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Libido-boosting diet and lifestyle for men and women

ROCK HER WORLD AT BREAKFAST
From http://www.mensfitness.com

Eat this:
* 1 cup cooked oatmeal (make it with 1% milk, a spoonful of cocoa powder, artificial sweetener, and top with chopped walnuts)
* 1 cup plain yogurt mixed with 1 cup chopped strawberries
* 8 oz Welch’s 100% Concord Grape Juice
Why:
You want your arteries like your bed partner: healthy, flexible, and ready to pump at a moment’s notice.
How it works:
Arteries gummed up with plaque reduce the flow of blood down below, making it more difficult to get rock hard and stay that way. Our meal combines oatmeal, which has been linked to lower blood cholesterol concentrations, plus cocoa, which amplifies its effects while boosting good HDL cholesterol. Nuts like walnuts supply a shot of the amino acid arginine to pump up the production of nitric oxide, a compound involved in successful erections, while grape juice and strawberries fight sodium and help your blood vessels to relax, ensuring your blood pressure stays in check.


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AMP UP THOSE LOVING FEELINGS AT LUNCH

Eat this:
* A salad made with 2 cups of romaine lettuce, 1 medium chopped tomato, 1⁄2 cup of marinated artichokes (drained) plus balsamic vinegar and olive oil dressing
* A can of your favorite beef stew with 1 cup cooked, cooled barley added
Why:
To protect your nerves—so you feel maximum pleasure in the sack.
How it works:
A hearty stew tames elevated blood sugar levels, which can wreak havoc with nerves in your nether region, preventing you from enjoying sex to the fullest. Barley is brimming with a type of fiber that suppresses spikes in blood glucose. Meanwhile, the chromium in romaine and tomatoes boosts insulin activity, helping to keep blood levels on an even keel. And the magnesium in artichokes improves insulin sensitivity, preventing glucose buildup.

BOOST YOUR TESTOSTERONE AT DINNERTIME

Eat this:
* 6 oz grilled pork tenderloin
* 1 cup quinoa tossed with 1⁄4 cup chopped cashews
* 1 cup cooked broccoli drizzled with 1 tablespoon olive oil
Why:
To help your body hormone up.
How it works:
Cashews and pork are chock-full of zinc, a mineral that’s essential for testosterone production. The high-quality protein in pork and quinoa can also help you lose the love handles that may be holding you back beneath the sheets (or on the couch). That’s because excess fat prompts the body to tie up T, rendering it unavailable to stir sexual urges. Finally, olive oil and cashews provide a bit of good fat to your system, since very-low-fat diets sap testosterone.

For women, libido boosting lifestyle and nutrition
Dr. Laurie Steelsmith, author of “Great Sex, Naturally: Every Woman’s Guide to Enhancing Her Sexuality through the Secrets of Natural Medicine”

Nine strategies to get you started

Add super-libido foods to your diet. Foods and supplements unusually rich in nutrients, vitamins and minerals that have unique potential to promote your sexual well-being include flaxseeds, hemp seeds, chia seeds, pumpkin seeds, coconut oil, pomegranates, blueberry juice, acai juice, mangosteen juice, cruciferous vegetables, green tea and shiitake mushrooms.

Do sex-enhancing exercises

Balance is the key. You want to get the benefits of both aerobic exercises and resistance exercises like weight lifting. Do at least 20 minutes of each three to four times a week. You can also use the Chinese principle of yin and yang to achieve balance. Yin exercises include walking or swimming or slow ballroom dancing. Yang is more rigorous like running, tennis and weight lifting.

Detox your home for better sex drive

When your body is not bombarded with chemicals it can’t easily process, it doesn’t have to spend so much energy flushing out toxins. Go through every cabinet, drawer and shelf and swap chemical cleaning products and personal-care products for all-natural versions. Throw out Teflon pans and dump plastic containers.

Cleanse your body from the inside out

Do a 21-day dietary cleanse. For 21 days, eliminate all gluten and sugar. Consume only rice, quinoa, amaranth, tapioca or buckwheat for grains. Eat a multicolored raw salad daily. Increase your vegetable intake. Avoid dairy and eggs. Limit protein to organic poultry, wild salmon, beans and legumes. Minimize fruit intake. Drink 12 ounces of water with lemon juice added. Dry brush your body once a day before you bathe or shower. Try to visit a sauna weekly to sweat out toxins.

Supplement to support your midlife libido

Seaweed and cruciferous vegetables will noticeably improve your body’s ability to make friendly estrogen and eliminate “unfriendly” estrogen.

Try herbal aphrodisiacs

Because they vary from one person to the next, you may want to experiment. Try Chinese ginseng, cordyceps, rehmannia, epimedium, reishi, ginkgo biloba, catuaba, suma, muira puama, damiana, maca and yohimbine. My book explains more about how to take them.

Consume libido-enhancing foods and supplements

After the 21-day cleanse, these foods can pack an extra punch of pleasure potential: L-arginine, an amino acid; PEA, known as the “love supplement”; sweet potatoes; chocolate; oysters; chili peppers; and honey.

Minimize anti-aphrodisiac foods in your diet

They include alcohol; fatty foods that make you feel heavy and lethargic; trans-fats; sugar, which reduces your ability to become aroused; and caffeine, which breaks down testosterone.

Use your mind to create a sexy lifestyle

Manage your stress. Spend more time with your partner. Sharing intimate thoughts and feelings is a definite aphrodisiac. Work on building “sexual trust” – a woman’s capacity for pleasure is closely linked to her brain’s ability to release inhibition and suspend judgment. Add yoga, art, music, dance and spontaneous fun to your life.


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Health differences in Women and Men

Reference: Clinical Chemistry and Laboratory Medicine. Volume 51, Issue 4, Pages 713–727, ISSN (Online) 1437-4331, ISSN (Print) 1434-6621, DOI: 10.1515/cclm-2012-0849, March 2013

• Men: Increased rate of liver fibrosis progression: age at infection older than 40 years, daily alcohol consumption of 50 g or more and male sex. Liver in 25.8% of men and in 20.3% in females ; the mean age of males with fatty liver was 43.3±1.2 years versus 56.5±1.1 in women
• Men: Genetic hemochromatosis/Iron Overload , prevalence is higher in males than in females

• Women: Menstruation can play an important role in reducing the toxic effect of iron accumulation.
• Women are more prone to the development of side effects and different pharmacological response to drug treatment.

Women: Systemic Lupus Erythematosus. SLE is an autoimmune disorder characterized by the production of pathogenic autoantibodies, primarily to nuclear antigens, as well as dysregulation of both T and B cells. B cells display accelerated maturity. SLE patients exhibit monocyte-derived DCs, which display an activated, proinflammatory phenotype. SLE has a female preponderance of 9:1. Although there are X-chromosome abnormalities associated with SLE, estrogen itself is strongly implicated in SLE autoimmunity. SLE is associated with a disrupted sex hormone balance characterized by lower amounts of androgens and dramatically higher levels of the estrogen metabolite.

Women are more prone to drug side-effects: CYP3A4 ligands, enzymes involved in the metabolism of xenobiotics in the human body. Xenobiotics are potentially harm-ful, lipid-soluble chemicals that are foreign to the human body.
Following is a table of selected substrates/participants, inducers/increase and inhibitors/decrease of CYP3A4. Where classes of agents are listed, there may be exceptions within the class.
Inhibitors of CYP3A4 can be classified by their potency, such as:
• Strong inhibitor being one that causes at least a 5-fold increase in the plasma AUC values, or more than 80% decrease in clearance.
• Moderate inhibitor being one that causes at least a 2-fold increase in the plasma AUC values, or 50-80% decrease in clearance.
• Weak inhibitor being one that causes at least a 1.25-fold but less than 2-fold increase in the plasma AUC values, or 20-50% decrease in clearance.

Selected inducers, inhibitors and substrates of CYP3A4

Substrates/Participants Inhibitors/Decrease Inducers/Increase
• some immunosuppressants
o ciclosporin (cyclosporin) [27][29]
o tacrolimus[27][29]
o sirolimus[27][29]
• many chemotherapeutic
o docetaxel[27][29]
o tamoxifen[27][29]
o paclitaxel[27][29]
o cyclophosphamide[29]
o doxorubicin[29]
o erlotinib[30]
o etoposide[29]
o ifosfamide[29]
o teniposide[29]
o vinblastine[29]
o vincristine[27]
o vindesine[29]
o imatinib[27]
o irinotecan[27]
o sorafenib[27]
o sunitinib[27]
o temsirolimus[27]
o anastrazole
o gefitinib
• azole antifungals
o ketoconazole[29]
o itraconazole[29]
• macrolides
o clarithromycin[27][29]
o erythromycin[27]
o telithromycin[27]
(not azithromycin)[27]
• dapsone[27] (in leprosy)
• tricyclic antidepressants
o amitriptyline[29]
o clomipramine[29]
o imipramine[29]
• SSRIs
o citalopram[29]
o norfluoxetine[29]
o sertraline[29]
• some other antidepressants
o mirtazapine[29] (NaSSA)
o nefazodone[29]
o reboxetine[29]
o venlafaxine[29] (SNRI)
o trazodone[27] (SARI
• buspirone[27][29] (anxiolytic)
• antipsychotics
o haloperidol[27][29]
o aripiprazole[27]
o risperidone[27]
o ziprasidone[27]
o pimozide[29]
o quetiapine[27]
• opioids (mainly analgesics)
o alfentanil[27][29]
o buprenorphine[31]
o codeine[27] (analgesic, antitussive, antidiarrheal)
o fentanyl[27]
o methadone[27] (analgesic, anti-addictive)
o levacetylmethadol[27]
• benzodiazepines
o alprazolam[27][29]
o midazolam[27][29]
o triazolam[27][29]
o diazepam[27]
• some hypnotics
o zopiclone[29]
o zaleplon[27]
o zolpidem[27]
• donepezil[29] (acetylcholinesterase inhibitor)
• statins
o atorvastatin[27][29]
o lovastatin[27][29]
o simvastatin[29]
o cerivastatin[27]
(not pravastatin)[27]
(not rosuvastatin)[27]
• calcium channel blockers
o diltiazem[27][29]
o felodipine[27][29]
o nifedipine[27][29]
o verapamil[27][29]
o amlodipine[27]
o lercanidipine[27]
o nitrendipine[27]
o nisoldipine[27]
• amiodarone[29] (class III antiarrhythmic)
• dronedarone[29] (class III antiarrhythmic)
• quinidine[27] (class I antiarrhythmic)
• PDE5 inhibitors
o sildenafil[27][29]
o tadalafil[32]
• kinins[29] (vasodilators, smooth muscle contractors)
• sex hormones agonists and antagonists
o finasteride[27][29] (antiandrogen)
o estradiol[27] (estrogen)
o progesterone[27]
o ethinylestradiol[29] (hormonal contraceptive)
o testosterone[27] (androgen)
o toremifene[29] (SERM)
o bicalutamide [33]
• H1-receptor antagonists
o terfenadine[27][29]
o astemizole[27][34]
o chlorphenamine[27]
• Protease inhibitors
o indinavir[27][29]
o ritonavir[27][29]
o saquinavir[27][29]
o nelfinavir[27][29]
• non-nucleoside reverse transcriptase inhibitors
o nevirapine[29]
• some glucocorticoids
o budesonide[29]
o hydrocortisone[27]
o dexamethasone[27]
• cisapride[27][29] (5-HT4 receptor agonist)
• aprepitant[27] (antiemetic)
• caffeine[27] (stimulant)
• cocaine[27] (stimulant)
• cilostazol[27] (phosphodiesterase inhibitor)
• dextromethorphan[27] (antitussive)
• domperidone[27] (antidopaminergic)
• eplerenone[27] (aldosterone antagonist)
• lidocaine[27] (local anesthetic, antiarrhythmic)
• ondansetron[27] (5-HT3 antagonist)
• propranolol[27] (beta blocker)
• salmeterol[27] (beta agonist)
• warfarin[35] (anticoagulant)
• clopidogrel, becoming bioactivated[36] (antiplatelet)
• esomeprazole[29] (proton pump inhibitor)
• nateglinide[27] (antidiabetic)
strong:
• protease inhibitors
o ritonavir[27][29][37]
o indinavir[27]
o nelfinavir[27]
o saquinavir[27]
• some macrolide antibiotics[37]
o clarithromycin[27][29]
o telithromycin[27]
• chloramphenicol (antibiotic)[38]
• some azole antifungals
o ketoconazole[27][29]
o itraconazole[27][29]
• nefazodone[27][29] (antidepressant)
moderate
• aprepitant[27] (antiemetic)
• some calcium channel blockers
o verapamil[27]
o diltiazem[27]
• some macrolide antibiotics
o erythromycin[27]
• some azole antifungals[37]
o fluconazole[27]
• bergamottin (constituent of grapefruit juice)[27]
• Valerian [39]
weak:
• cimetidine[27] (H2-receptor antagonist)
• buprenorphine (analgesic)[40]
• cafestol (in unfiltered coffee)[41]
unspecified potency:
• amiodarone[27] (antiarrhythmic)
• bicalutamide[33]
• ciprofloxacin[27] (antibiotic)
• dithiocarbamate[27] (functional group)
• voriconazole[27] (antifungal)
• imatinib[27] (anticancer)
• mifepristone[27] (abortifacient)
• norfloxacin[27] (antibiotic)
• some non-nucleoside reverse transcriptase inhibitors[42]
o delavirdine[27]
• gestodene[27] (hormonal contraceptive)
• mibefradil[27] (in angina pectoris)
• SSRIs
o fluoxetine/norfluoxetine[27]
o fluvoxamine[27]
• star fruit[27][43]
• milk thistle[44]
• ginko biloba[45]
• quercetin – Quercetin has been shown to act as an initial inhibitor and subsequent inducer.[46]
• piperine[47]
• anticonvulsants, mood stabilizers
o carbamazepine[27][29][37]
o phenytoin[27][29] (anticonvulsant)
o oxcarbazepine[27]
• barbiturates[37]
o phenobarbital[27][29]
• St. John’s wort[27][29]
• some bactericidals
o rifampicin[27][37]
o rifabutin[27][29]
• some non-nucleoside reverse transcriptase inhibitors [42]
o efavirenz[27]
o nevirapine[27]
• some hypoglycemics
o pioglitazone[27]
o troglitazone[27]
• glucocorticoids[27] (blood glucose increase, immunosuppressive)
Ref: http://en.wikipedia.org/wiki/CYP3A4

Eggs for happiness/joy

Eat your eggs to promote hypocretin/orexin since absence of these neurotransmitters for happiness/joy can lead to obesity, depression and narcolepy (irresistible sleepiness). Stress lowers levels of orexin while family/social support system and love increases levels of orexin.

Eggs

A little over a decade ago, scientists discovered that narcolepsy, the neurological disorder that leads to episodes of irresistible sleepiness, is caused by the loss of brain cells that produce hypocretin, a neurotransmitter that promotes wakefulness.
But the discovery did not shed light on two other mysterious problems associated with the disorder. Narcoleptics have profoundly high rates of depression — up to six times the rate in the general population — and they have a tendency to collapse when swept by some emotions, a phenomenon known as cataplexy.
Now research shows that in addition to regulating sleep, hypocretin also appears to govern emotion, particularly experiences of joy and happiness.
The study has implications that extend beyond narcolepsy. It suggests that the brain has several different arousal systems, and that one of them, driven by hypocretin, has the specific function of keeping people awake for pleasure.
A 2008 study indicated that orexin plays an essential role in mediating reduced depression-like symptoms induced by calorie restriction.
Food source: Eggs (hormone-free)
The Cambridge team found that protein components of the type found in egg whites stimulated the neurons much more than other nutrients, the amino acids in the egg whites appearing to stop glucose from blocking the cells.
Senior study author, Dr Denis Burdakov, says further: “We found that activity in the orexin/hypocretin system is regulated by macronutrient balance rather than simply by the caloric content of the diet, suggesting that the brain contains not only energy-sensing cells, but also cells that can measure dietary balance.”
British Egg Information Service nutritionist Dr Carrie Ruxton says: “This study provides yet more proof that eggs are a superfood. As well as being rich in vitamins, minerals and protein, eggs make us feel fuller for longer after meals, thus helping with weight control. This latest study confirms the benefits of the special proteins found in eggs. Another good reason to go to work on an egg!”

 Drugs

It also raises concerns that drugs that block hypocretin could potentially cause depression and other unexpected side effects. One such medication, a sleeping pill from Merck called suvorexant that works by blocking hypocretin, essentially causing narcolepsy for a night, is awaiting government approval.
The new research, published this month in the journal Nature Communications, involved a small group of patients with epilepsy who had special electrodes implanted in their brains that could directly monitor seizure activity and hypocretin levels around the clock.
“Apart from their seizure disorder, these patients were normal,” said Dr. Jerome Siegel of the V.A. greater Los Angeles Healthcare System, the study leader and a psychiatry professor at U.C.L.A. “They’re watching TV, they’re talking to their relatives, walking around the hospital, going to the bathroom. They’re not mentally handicapped in any way, and we are observing them with video and periodically asking them to complete forms indicating how they feel – whether they’re happy or sad, hungry or thirsty, in pain or not.”
Dr. Siegel, along with graduate student Ashley Blouin and their colleagues, expected to find that the ebb and flow of hypocretin mirrored the sleep cycle, rising in the morning and falling at night.
“But what we found was more complex,” Dr. Siegel said. “The maximal release of hypocretin was not really related to arousal in the usual way. It happened during waking for sure, but the maximal release was simply when people reported they were happy.”
The findings showed that hypocretin levels surged when the patients experienced joy and pleasure – while watching a favorite team win a baseball game, for example, or spending time with family. But when they experienced pain from their surgical implant, or anxiety about their medical situation, their levels of hypocretin fell.
Dr. Siegel has shown in animal studies that hypocretin is associated with reward-seeking behavior. Release a dog into a yard to run, dig and play, and its hypocretin levels soar. But force the same dog to run on a treadmill, and its hypocretin levels remain flat. Similarly, hypocretin levels fall when mice are forced to press a bar to escape an unpleasant shock, but spike when the same animals press a bar to obtain food.
“This shows that hypocretin is related to a particular kind of arousal,” said Dr. Siegel. “There is an arousal system in the brain whose function is keeping you awake for pleasure, to get rewards. It is related to positive affect, and in its absence you have a deficit in pleasure seeking.”
In narcoleptics, cataplexy is most frequently caused by sudden joy. It is not uncommon to see someone with narcolepsy abruptly lose all muscle tone and collapse when laughing.
But in some ways, we can all relate.
“In almost every culture there’s an expression equivalent to falling down with laughter,” Dr. Siegel said. “Normal individuals don’t actually fall down. They may brace themselves or sit down. But narcoleptics will feel weak and unable to speak. In some instances they’ll fall down and won’t be able to get up for a few minutes.”
In most people, laughter causes a surge of hypocretin, which maintains muscle tone. But in narcoleptics, the hormone is largely absent, and the system goes haywire.
In narcoleptics, the loss of this pleasure-seeking hormone has severe effects on mood. Narcoleptics are prone to depression, and they have a strange resistance to addiction. Some of the medications used to treat narcolepsy are notoriously addictive, like amphetamines and GHB, the so-called date-rape drug. Yet narcoleptics generally do not abuse them.
“They’re missing this working-for-pleasure system,” Dr. Siegel said. “When hypocretin is missing, you have a deficit in getting addicted and a deficiency in getting interested in things — that’s what depression is.”
So, could a sleep aid like suvorexant, which reduces hypocretin, lead to depression in a healthy person? In clinical trials involving thousands of patients, the drug helped people with insomnia fall asleep faster and stay asleep longer than placebo. And there were no signs that it induced depression or caused falls resembling cataplexy, said Dr. Darryle Schoepp, senior vice president at Merck.
“We had to measure psychiatric mood, including depression,” he said, “and we didn’t see anything worrisome there.”
But Dr. Siegel said it is too soon to say that tinkering with hypocretin will not create unwanted consequences.
“The initial reports are rosy,” he said. “But they come from a drug company with an enormous investment. And there is a long list of drugs acting on the brain whose severe problems were only identified after millions of people were taking them.”
Orexin, also called hypocretin, is a neurotransmitter that regulates arousal, wakefulness, and appetite.[1] The most common form of narcolepsy, in which the sufferer briefly loses muscle tone (cataplexy), is caused by a lack of orexin in the brain due to destruction of the cells that produce it.[2]
The brain contains very few cells that produce orexin; in a human brain, about 10,000 to 20,000 neurons[2] in the hypothalamus.[1] However, the axons from these neurons extend throughout the entire brain and spinal cord,[3] where there are also receptors for orexin.
Orexin was discovered almost simultaneously by two independent groups of rat-brain researchers.[4][5] One group named it orexin, from orexis, meaning “appetite” in Greek; the other group named it hypocretin, because it is produced in the hypothalamus and bears a weak resemblance to secretin, a hormone found in the gut.[2] The scientific community has not yet settled on a consensus for which word to use.

 Isoforms

There are two types of orexin: orexin-A and -B (hypocretin-1 and -2). They are excitatory neuropeptide hormones with approximately 50% sequence identity, are produced by cleavage of a single precursor protein. Orexin-A is 33 amino acid residues long and has two intrachain disulfide bonds; orexin-B is a linear 28 amino acid residue peptide. Studies suggest that orexin-A may be of greater biological importance than orexin-B. Although these peptides are produced by a very small population of cells in the lateral and posterior hypothalamus, they send projections throughout the brain. The orexin peptides bind to the two G-protein coupled orexin receptors, OX1 and OX2, with orexin-A binding to both OX1 and OX2 with approximately equal affinity while orexin-B binds mainly to OX2 and is 5 times less potent at OX1.[6]
The orexins are strongly conserved peptides, found in all major classes of vertebrates.[citation needed]
Function
The orexin system was initially suggested to be primarily involved in the stimulation of food intake, based on the finding that central administration of orexin-A increases food intake. In addition, it stimulates wakefulness and energy expenditure.
Brown fat activation
Obesity in orexin knockout mice is a result of inability of brown preadipocytes to differentiate into brown adipose tissue (BAT), which in turn reduces BAT thermogenesis. BAT differentiation can be restored in these knockout mice through injections of orexin. Deficiency in orexin has also been linked to narcolepsy, a sleep disorder. Furthermore narcoleptic people are more likely to be obese. Hence obesity in narcoleptic patients may be due to orexin deficiency leading to brown-fat hypo activity and reduced energy expenditure.[7]

 Wakefulness

Orexin seems to promote wakefulness. Recent studies indicate that a major role of the orexin system is to integrate metabolic, circadian and sleep debt influences to determine whether an animal should be asleep or awake and active. Orexin neurons strongly excite various brain nuclei with important roles in wakefulness including the dopamine, norepinephrine, histamine and acetylcholine systems[8][9] and appear to play an important role in stabilizing wakefulness and sleep.
The discovery that an orexin receptor mutation causes the sleep disorder canine narcolepsy[10] in Doberman Pinschers subsequently indicated a major role for this system in sleep regulation. Genetic knockout mice lacking the gene for orexin were also reported to exhibit narcolepsy.[11] Transitioning frequently and rapidly between sleep and wakefulness, these mice display many of the symptoms of narcolepsy. Researchers are using this animal model of narcolepsy to study the disease.[12] Narcolepsy results in excessive daytime sleepiness, inability to consolidate wakefulness in the day (and sleep at night), and cataplexy, which is the loss of muscle tone in response to strong, usually positive, emotions. Dogs that lack a functional receptor for orexin have narcolepsy, while animals and people lacking the orexin neuropeptide itself also have narcolepsy.
Central administration of orexin-A strongly promotes wakefulness, increases body temperature, locomotion and elicits a strong increase in energy expenditure. Sleep deprivation also increases orexin-A transmission. The orexin system may thus be more important in the regulation of energy expenditure than food intake. In fact, orexin-deficient narcoleptic patients have increased obesity rather than decreased BMI, as would be expected if orexin were primarily an appetite stimulating peptide. Another indication that deficits of orexin cause narcolepsy is that depriving monkeys of sleep for 30–36 hours and then injecting them with the neurochemical alleviates the cognitive deficiencies normally seen with such amount of sleep loss.[13][14]
In humans, narcolepsy is associated with a specific variant of the human leukocyte antigen (HLA) complex.[15] Furthermore, genome-wide analysis shows that, in addition to the HLA variant, narcoleptic humans also exhibit a specific genetic mutation in the T-cell receptor alpha locus.[16] In conjunction, these genetic anomalies cause the autoimmune system to attack and kill the critical orexin neurons. Hence the absence of orexin-producing neurons in narcoleptic humans may be the result of an autoimmune disorder.[17]

 Food Intake

Orexin increases the craving for food, and correlates with the function of the substances that promote its production.
Leptin is a hormone produced by fat cells and acts as a long-term internal measure of energy state. Ghrelin is a short-term factor secreted by the stomach just before an expected meal, and strongly promotes food intake.
Orexin-producing cells have recently been shown to be inhibited by leptin (through the leptin receptor pathway), but are activated by ghrelin and hypoglycemia (glucose inhibits orexin production). Orexin, as of 2007, is claimed to be a very important link between metabolism and sleep regulation.[citation needed] Such a relationship has been long suspected, based on the observation that long-term sleep deprivation in rodents dramatically increases food intake and energy metabolism, i.e., catabolism, with lethal consequences on a long-term basis.

 Pharmacologic potential

The research on orexin mimics is still in an early phase, although many scientists believe that orexin-based drugs could help narcoleptics and increase alertness in the brain without the side effects of amphetamines.
Merck reported at the Sleep 2012 conference that insomniacs taking an orexin blocker, suvorexant, fell asleep faster and slept an hour longer. Suvorexant was tested for three months on over a thousand patients in a phase III trial.
Preliminary research has been conducted that shows potential for orexin blockers in the treatment of alcoholism. Lab rats given drugs which targeted the orexin system lost interest in alcohol despite being given free access in experiments.[18][19]
A study has reported that transplantation of orexin neurons into the pontine reticular formation in rats is feasible, indicating the development of alternative therapeutic strategies in addition to pharmacological interventions to treat narcolepsy.[20]
Because orexin-A receptors have been shown to regulate relapse to cocaine seeking, a new study investigated its relation to nicotine by studying rats. By blocking the orexin-A receptor with low doses of the selective antagonist SB-334,867, nicotine self-administration decreased and also the motivation to seek and obtain the drug. The study showed that blocking of receptors in the insula decreased self-administration, but not blocking of receptors in the adjacent somatosensory cortex. The greatest decrease in self-administration was found when blocking all orexin-A receptors in the brain as a whole. A rationale for this study was the fact that the insula has been implicated in regulating feelings of craving. The insula contains orexin-A receptors. It has been reported that smokers who sustained damage to the insula lost the desire to smoke.[21]

 Lipid metabolism

Orexin-A (OXA) has been recently demonstrated to have direct effect on a part of the lipid metabolism. OXA stimulates glucose uptake in 3T3-L1 adipocytes and that increased energy uptake is stored as lipids (triacylglycerol). OXA thus increases lipogenesis. It also inhibits lipolysis and stimulates the secretion of adiponectin. These effects are thought to be mostly conferred via the PI3K pathway because this pathway inhibitor (LY294002) completely blocks OXA effects in adipocytes.[22] The link between OXA and the lipid metabolism is new and currently under more research.
Obesity in orexin-knockout mice is associated with impaired brown adipose tissue thermogenesis.[7]

 Mood

High levels of orexin-A have been associated with happiness in human subjects, while low levels have been associated with sadness.[23] The finding suggests that boosting levels of orexin-A could elevate mood in humans, being thus a possible future treatment for disorders like depression. Likewise, it helps explain the incidence of depression associated with narcolepsy.

 Interaction with other neurotransmitter systems

Orexinergic neurons have been shown to be sensitive to inputs from Group III metabotropic glutamate receptors,[27] adenosine A1 receptors,[28] muscarinic M3 receptors,[29] serotonin 5-HT1A receptors,[30] neuropeptide Y receptors,[31] cholecystokinin A receptors,[32] and catecholamines,[33][34] as well as to ghrelin, leptin, and glucose.[35] Orexinergic neurons themselves regulate release of acetylcholine,[36][37] serotonin and noradrenaline,[38] so despite the relatively small number of orexinergic neurons compared to other neurotransmitter systems in the brain, this system plays a key regulatory role and extensive research will be required to unravel the details. Orexins act on Gq-protein-coupled receptors signaling through phospholipase C (PLC) and calcium-dependent as well as calcium-independent transduction pathways. These include activation of electrogenic sodium-calcium exchangers (NCX) and a non-specific cationic conductance, likely channels of the transient receptor potential canonical-(TRPC) type activation of L-type voltage-dependent calcium channels, closure of G-protein-activated inward rectifier potassium channels (GIRK), and activation of protein kinases, including protein kinase C (PKC), protein kinase A (PKA), and mitogen-associated protein kinase, also called mitogen-activated protein kinase (MAPK). Postsynaptic actions of orexins on their numerous neuronal targets throughout the CNS are almost entirely excitatory.[39]
References
1. ^ a b “Orexigenic Hypothalamic Peptides Behavior and Feeding”, pp. 361–2, Jon F. Davis, Derrick L. Choi, and Stephen C. Benoit, in Handbook of Behavior, Food and Nutrition, Victor R. Preedy, Ronald Ross Watson, and Colin R. Martin, eds. Springer, 2011
2. ^ a b c Stanford Center for Narcolepsy FAQ (retrieved 27-Mar-2012)
3. ^ “Orexin Projections and Localization of Orexin Receptors”, Jacob N. Marcus and Joel K. Elmquist, chapter 3, The Orexin/Hypocretin System: Physiology and Pathophysiology, Seiji Nishino and Takeshi Sakurai, eds. Springer, 2006
4. ^ a b Sakurai T, Amemiya A, Ishii M, Matsuzaki I, Chemelli RM, Tanaka H, Williams SC, Richardson JA, Kozlowski GP, Wilson S, Arch JR, Buckingham RE, Haynes AC, Carr SA, Annan RS, McNulty DE, Liu WS, Terrett JA, Elshourbagy NA, Bergsma DJ, Yanagisawa M (1998). “Orexins and orexin receptors: a family of hypothalamic neuropeptides and G protein-coupled receptors that regulate feeding behavior”. Cell 92 (4): 573–85. doi:10.1016/S0092-8674(00)80949-6. PMID 9491897.
5. ^ a b de Lecea L, Kilduff TS, Peyron C, Gao X, Foye PE, Danielson PE, Fukuhara C, Battenberg EL, Gautvik VT, Bartlett FS, Frankel WN, van den Pol AN, Bloom FE, Gautvik KM, Sutcliffe JG (1998). “The hypocretins: Hypothalamus-specific peptides with neuroexcitatory activity”. Proc. Natl. Acad. Sci. U.S.A. 95 (1): 322–7. doi:10.1073/pnas.95.1.322. PMC 18213. PMID 9419374.
6. ^ Langmead CJ, Jerman JC, Brough SJ, Scott C, Porter RA, Herdon HJ (January 2004). “Characterisation of the binding of 3H-SB-674042, a novel nonpeptide antagonist, to the human orexin-1 receptor”. Br. J. Pharmacol. 141 (2): 340–6. doi:10.1038/sj.bjp.0705610. PMC 1574197. PMID 14691055.
7. ^ a b Sellayah D, Bharaj P, Sikder D (October 2011). “Orexin is required for brown adipose tissue development, differentiation, and function”. Cell Metab. 14 (4): 478–90. doi:10.1016/j.cmet.2011.08.010. PMID 21982708. Lay summary – ScienceDaily.
8. ^ Sherin JE, Elmquist JK, Torrealba F, Saper CB (June 1998). “Innervation of histaminergic tuberomammillary neurons by GABAergic and galaninergic neurons in the ventrolateral preoptic nucleus of the rat”. J. Neurosci. 18 (12): 4705–21. PMID 9614245.
9. ^ Lu J, Bjorkum AA, Xu M, Gaus SE, Shiromani PJ, Saper CB (June 2002). “Selective activation of the extended ventrolateral preoptic nucleus during rapid eye movement sleep”. J. Neurosci. 22 (11): 4568–76. PMID 12040064.
10. ^ Lin L, Faraco J, et. al. (1999). “The sleep disorder canine narcolepsy is caused by a mutation in the hypocretin (orexin) receptor 2 gene”. Cell 98 (3): 365–376. doi:10.1016/S0092-8674(00)81965-0. PMID 10458611.
11. ^ Chemelli RM, Willie JT, et. al. (1999). “Narcolepsy in orexin knockout mice: molecular genetics of sleep regulation”. Cell 98 (4): 437–451. doi:10.1016/S0092-8674(00)81973-X. PMID 10481909.
12. ^ Mochizuki T, Crocker A, McCormack S, Yanagisawa M, Sakurai T, Scammell TE (July 2004). “Behavioral state instability in orexin knock-out mice”. J. Neurosci. 24 (28): 6291–300. doi:10.1523/JNEUROSCI.0586-04.2004. PMID 15254084.
13. ^ Alexis Madrigal (2007-12-28). “Snorting a Brain Chemical Could Replace Sleep”. Wired News, Condé Nast. Retrieved 2008-02-05.
14. ^ Deadwyler SA, Porrino L, Siegel JM, Hampson RE (2007). “Systemic and nasal delivery of orexin-A (Hypocretin-1) reduces the effects of sleep deprivation on cognitive performance in nonhuman primates”. J. Neurosci. 27 (52): 14239–47. doi:10.1523/JNEUROSCI.3878-07.2007. PMID 18160631.
15. ^ Klein J, Sato A (September 2000). “The HLA system. Second of two parts”. N. Engl. J. Med. 343 (11): 782–6. doi:10.1056/NEJM200009143431106. PMID 10984567.
16. ^ Hallmayer J, Faraco J, Lin L, et al. (June 2009). “Narcolepsy is strongly associated with the TCR alpha locus”. Nat. Genet. 41 (6): 708–11. doi:10.1038/ng.372. PMC 2803042. PMID 19412176.
17. ^ “Narcolepsy is an autoimmune disorder, Stanford researcher says”. EurekAlert. American Association for the Advancement of Science. 2009-05-03. Retrieved 2009-05-31.
18. ^ Helen Puttick (2006-12-26). “Hope in fight against alcoholism”. The Herald.
19. ^ Lawrence AJ, Cowen MS, Yang HJ, Chen F, Oldfield B (2006). “The orexin system regulates alcohol-seeking in rats”. Br. J. Pharmacol. 148 (6): 752–9. doi:10.1038/sj.bjp.0706789. PMC 1617074. PMID 16751790.
20. ^ Arias-Carrión O, Murillo-Rodriguez E, Xu M, Blanco-Centurion C, Drucker-Colín R, Shiromani PJ (2004). “Transplantation of Hypocretin Neurons into the Pontine Reticular Formation: Preliminary Results”. Sleep 27 (8): 1465–70. PMC 1201562. PMID 15683135.
21. ^ “Blocking A Neuropeptide Receptor Decreases Nicotine Addiction”. ScienceDaily LLC. 2008-12-01. Retrieved 2009-02-11.
22. ^ Skrzypski M, T Le T, Kaczmarek P, Pruszynska-Oszmalek E, Pietrzak P, Szczepankiewicz D, Kolodziejski PA, Sassek M, Arafat A, Wiedenmann B, Nowak KW, Strowski MZ (2011 Jul). “Orexin A stimulates glucose uptake, lipid accumulation and adiponectin secretion from 3T3-L1 adipocytes and isolated primary rat adipocytes”. Diabetologia 5 (47): 1841–52. doi:10.1007/s00125-011-2152-2. PMID 21505958.
23. ^ Ashley M. Blouin, Itzhak Fried, Charles L. Wilson, Richard J. Staba, Eric J. Behnke, Hoa A. Lam, Nigel T. Maidment, Karl Æ. Karlsson, Jennifer L. Lapierre, Jerome M. Siegel (2013). “Human hypocretin and melanin-concentrating hormone levels are linked to emotion and social interaction.”. Nature Communications (4): 1547. doi:10.1038/ncomms2461. Lay summary – Science Daily.
24. ^ a b Gautvik KM, de Lecea L, et. al. (1996). “Overview of the most prevalent hypothalamus-specific mRNAs, as identified by directional tag PCR subtraction”. PNAS 93 (16): 8733–8738. doi:10.1073/pnas.93.16.8733. PMC 38742. PMID 8710940.
25. ^ Heifetz A, Morris GB, Biggin PC, Barker O, Fryatt T, Bentley J, Hallett D, Manikowski DP, Pal S, Reifegerste R, Slack M, Law R (2012). “Study of Human Orexin-1 and -2 G-Protein-Coupled Receptors with Novel and Published Antagonists by Modeling, Molecular Dynamics Simulations, and Site-Directed Mutagenesis”. Biochemistry 51 (15): 3178–3197. doi:10.1021/bi300136h.
26. ^ Baxter CA, Cleator ED, Karel MJ, Edwards JS, Reamer RA, Sheen FJ, Stewart GW, Strotman NA, Wallace DJ (2011). “The First Large-Scale Synthesis of MK-4305: A Dual Orexin Receptor Antagonist for the Treatment of Sleep Disorder”. Organic Process Research & Development 15 (2): 367–375. doi:10.1021/op1002853.
27. ^ Acuna-Goycolea C, Li Y, Van Den Pol AN (March 2004). “Group III metabotropic glutamate receptors maintain tonic inhibition of excitatory synaptic input to hypocretin/orexin neurons”. J. Neurosci. 24 (12): 3013–22. doi:10.1523/JNEUROSCI.5416-03.2004. PMID 15044540.
28. ^ Liu ZW, Gao XB (January 2007). “Adenosine inhibits activity of hypocretin/orexin neurons via A1 receptor in the lateral hypothalamus: a possible sleep-promoting effect”. J. Neurophysiol. 97 (1): 837–48. doi:10.1152/jn.00873.2006. PMC 1783688. PMID 17093123.
29. ^ Ohno K, Hondo M, Sakurai T (March 2008). “Cholinergic regulation of orexin/hypocretin neurons through M(3) muscarinic receptor in mice”. J. Pharmacol. Sci. 106 (3): 485–91. doi:10.1254/jphs.FP0071986. PMID 18344611.[dead link]
30. ^ Muraki Y, Yamanaka A, Tsujino N, Kilduff TS, Goto K, Sakurai T (August 2004). “Serotonergic regulation of the orexin/hypocretin neurons through the 5-HT1A receptor”. J. Neurosci. 24 (32): 7159–66. doi:10.1523/JNEUROSCI.1027-04.2004. PMID 15306649.
31. ^ Fu LY, Acuna-Goycolea C, van den Pol AN (October 2004). “Neuropeptide Y inhibits hypocretin/orexin neurons by multiple presynaptic and postsynaptic mechanisms: tonic depression of the hypothalamic arousal system”. J. Neurosci. 24 (40): 8741–51. doi:10.1523/JNEUROSCI.2268-04.2004. PMID 15470140.
32. ^ Tsujino N, Yamanaka A, Ichiki K, Muraki Y, Kilduff TS, Yagami K, Takahashi S, Goto K, Sakurai T (August 2005). “Cholecystokinin activates orexin/hypocretin neurons through the cholecystokinin A receptor”. J. Neurosci. 25 (32): 7459–69. doi:10.1523/JNEUROSCI.1193-05.2005. PMID 16093397.
33. ^ Li Y, van den Pol AN (January 2005). “Direct and indirect inhibition by catecholamines of hypocretin/orexin neurons”. J. Neurosci. 25 (1): 173–83. doi:10.1523/JNEUROSCI.4015-04.2005. PMID 15634779.
34. ^ Yamanaka A, Muraki Y, Ichiki K, Tsujino N, Kilduff TS, Goto K, Sakurai T (July 2006). “Orexin neurons are directly and indirectly regulated by catecholamines in a complex manner”. J. Neurophysiol. 96 (1): 284–98. doi:10.1152/jn.01361.2005. PMID 16611835.
35. ^ Ohno K, Sakurai T (January 2008). “Orexin neuronal circuitry: role in the regulation of sleep and wakefulness”. Front Neuroendocrinol 29 (1): 70–87. doi:10.1016/j.yfrne.2007.08.001. PMID 17910982.

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A normal gene in overdrive is culprit for Leukemia, treated with drug for kidney cancer, now patient’s cancer is in remission

ST. LOUIS — Genetics researchers at Washington University, one of the world’s leading centers for work on the human genome, were devastated. Dr. Lukas Wartman, a young, talented and beloved colleague, had the very cancer he had devoted his career to studying. He was deteriorating fast. No known treatment could save him. And no one, to their knowledge, had ever investigated the complete genetic makeup of a cancer like his.
So one day last July, Dr. Timothy Ley, associate director of the university’s genome institute, summoned his team. Why not throw everything we have at seeing if we can find a rogue gene spurring Dr. Wartman’s cancer, adult acute lymphoblastic leukemia, he asked? “It’s now or never,” he recalled telling them. “We will only get one shot.”
Dr. Ley’s team tried a type of analysis that they had never done before. They fully sequenced the genes of both his cancer cells and healthy cells for comparison, and at the same time analyzed his RNA, a close chemical cousin to DNA, for clues to what his genes were doing.
The researchers on the project put other work aside for weeks, running one of the university’s 26 sequencing machines and supercomputer around the clock. And they found a culprit — a normal gene that was in overdrive, churning out huge amounts of a protein that appeared to be spurring the cancer’s growth.
Even better, there was a promising new drug that might shut down the malfunctioning gene — a drug that had been tested and approved only for advanced kidney cancer. Dr. Wartman became the first person ever to take it for leukemia.
And now, against all odds, his cancer is in remission and has been since last fall.
While no one can say that Dr. Wartman is cured, after facing certain death last fall, he is alive and doing well. Dr. Wartman is a pioneer in a new approach to stopping cancer. What is important, medical researchers say, is the genes that drive a cancer, not the tissue or organ — liver or brain, bone marrow, blood or colon — where the cancer originates.
One woman’s breast cancer may have different genetic drivers from another woman’s and, in fact, may have more in common with prostate cancer in a man or another patient’s lung cancer.
Under this new approach, researchers expect that treatment will be tailored to an individual tumor’s mutations, with drugs, eventually, that hit several key aberrant genes at once. The cocktails of medicines would be analogous to H.I.V. treatment, which uses several different drugs at once to strike the virus in a number of critical areas.
Ref: http://www.nytimes.com/2012/07/08/health/in-gene-sequencing-treatment-for-leukemia-glimpses-of-the-future.html?_r=0

Connie’s Comments
Normal genes in overdrive: What makes a normal gene in overdrive and behave abnormally making cancer cells grow? Can we stop normal genes from behaving in this manner, going overdrive? Can factors such as exitotoxicity and inflammation drive normal genes to overdrive?
Kidney cancer drugs are also used for other cancer types: Can we use it for other types of cancers? They did for a patient with leukemia after a complete analysis of his genes.
Personalized gene analysis: The story above was a result of detailed analysis/mapping of one patient’s gene which costs around $100,000. The public could not afford this price. But, the story above tells us that cancer cure is specific to the person’s gene make-up

Valproic acid for cell regeneration and for slowing tumors

Posted on 7. September 2010 by Vincent Giuliano

Note: In March 2013, some studies have shown that Valproic acid can be used to slow the progression of some tumors.

The chemical valproic acid has been around for a very long time. It was first synthesized in 1882 and for a great many years it seemed to be not very useful. However, over its 128 year history valproic acid has periodically risen in importance from the ashes like the phoenix bird* as new properties of it were discovered and new important applications found for it. In 1962 it was found to be a powerful anticonvulsant and it soon evolved to become a favorite mood stabilizer. Currently valproic acid seems to have strong potential applications for treating cancers and Alzheimer’s disease, and for guiding stem cell regeneration of nerves in cases of spinal cord injuries. This blog entry briefly covers the history of valproic acid and its major traditional applications and then focuses on important newfound properties of this substance and potential new applications for it.

History of valproic acid

Valerian (Valeriana officinalis) is a perennial plant of European and Asian origin. Dietary supplements have traditionally been made from its roots and have been used as a sedative for dealing with insomnia(ref). My wife tells me that back in the 60s valerian was often found in hippy cookbooks, and has been thought to have magical powers. “Its magical reputation is Evil and Protective, and it is used to Force Love. It is burned in Black Arts Incense for hexing, but added to Uncrossing Incense to destroy jinxes if burned with a yellow candle(ref).” Magic apart, research in the 1990s suggests that valerian achieves its effects through acting on the GABAA (gamma-aminobutyric acid) receptor, promoting the expression of GABA(ref).

“In conclusion, our data show that the extent of GABAA receptor modulation by Valerian extracts is related to the content of valeric acid(ref).” Valproic acid (also known as valproate and abbreviated VPA) is a synthetic substance, not present in the valerian plant. “Valproic acid (by its official name 2-propylvaleric acid) was first synthesized in 1882 by Burton as an analogue of valeric acid, found naturally in valerian.[1] (ref)” As we shall see, VPA too is a strong modulator of the GABA receptor. Although mostly not known to be evil, it is also strongly protective.
For the first 88 years of its history valproic acid did not seem to be good for very much except as a laboratory solvent. “In 1962, the French researcher Pierre Eymard serendipitously discovered the anticonvulsant properties of valproic acid while using it as a vehicle for a number of other compounds that were being screened for anti-seizure activity. He found that it prevented pentylenetetrazol-induced convulsions in rodents.[2] It was approved as an antiepileptic drug in 1967 in France and has become the most widely prescribed antiepileptic drug worldwide(ref).3”

By 2005, research showed that “Its pharmacological effects involve a variety of mechanisms, including increased gamma-aminobutyric acid (GABA)-ergic transmission, reduced release and/or effects of excitatory amino acids, blockade of voltage-gated sodium channels and modulation of dopaminergic and serotoninergic transmission(ref).” As described in a 2005 review paper, Valproate, a simple chemical with so much to offer, “Valproate is generally regarded as a first-choice agent for most forms of idiopathic and symptomatic generalized epilepsies.”
Soon after VPA started to be used to control seizures in the late 60s and early 70s, research was initiated on possible use of VPA for treatment of bipolar disorders,. By 1989 VPA’s role in treating psychiatric disorders was becoming well established. The 1989 publication Valproate in psychiatric disorders: literature review and clinical guidelines reported “A growing literature suggests that the anticonvulsant medication valproate may be effective and well tolerated in the acute and prophylactic treatment of some mood and psychotic disorders, particularly the manic phase of bipolar disorder and schizoaffective disorder.

Valproate may sometimes be effective even in those patients who have not responded to conventional somatic therapies.” Approved by the FDA for the treatment of manic or mixed episodes, with or without psychotic features , valproic acid is currently marketed as a mood stabilizer under various trade names such as Depakote and Depakene. “Besides its clinical use as an anticonvulsant and mood-stabilizing drug [9], VPA presents beneficial effects in clinical depression [10], absence seizures [11, 12], tonic-clonic seizures, complex partial seizures [13], juvenile myoclonic epilepsy [14], seizures associated with Lennox-Gastaut syndrome [15], migraine headaches, and schizophrenia(ref).” There are ten different branded valproic acid products sold by ten different pharma companies or their branches worldwide.

Additional potential applications of valproic acid

As time has progressed, one after another potential new medical application of valproic acid has emerged, and that process has been continuing until today. For example a July 2910 report indicates Valproic acid shown to halt vision loss in patients with retinitis pigmentosa. “WORCESTER, MASS. – Researchers at the University of Massachusetts Medical School (UMMS) believe they may have found a new treatment for retinitis pigmentosa (RP), a severe neurodegenerative disease of the retina that ultimately results in blindness.

One of the more common retinal degenerative diseases, RP is caused by the death of photoreceptor cells and affects 1 in 4,000 people in the United States. RP typically manifests in young adulthood as night blindness or a loss of peripheral vision and in many cases progresses to legal blindness by age 40. — In the July 20 online edition of the British Journal of Ophthalmology, Shalesh Kaushal, MD, PhD, chair of ophthalmology and associate professor of ophthalmology and cell biology at UMMS, and his team, describe a potential new therapeutic link between valproic acid and RP, which could have tremendous benefits for patients suffering from the disease. In a retrospective study, valproic acid – approved by the FDA to reduce seizures, treat migraines and manage bipolar disorder – appeared to have an effect in halting vision loss in patients with RP and in many cases resulted in an improved field of vision.

Results from this study, in conjunction with prior in vitro data, suggest valproic acid may be an effective treatment for photoreceptor loss associated with RP. — UMass Medical School will be the coordinating site for a $2.1 million, three-year clinical trial funded by the Foundation Fighting Blindness/National Neurovision Research Institute quantifying the potential of valproic acid as a treatment for RP.” The August 2010 paper in the British Journal of Ophthalmology Therapeutic potential of valproic acid for retinitis pigmentosa concludes “Treatment with VPA (valproic acid)_is suggestive of a therapeutic benefit to patients with RP. A placebo-controlled clinical trial will be necessary to assess the efficacy and safety of VPA for RP rigorously.”
In a quite different dimension, VPA might be very useful for treating Alzheimer’s Disease. The 2008 paper Valproic acid inhibits Aβ production, neuritic plaque formation, and behavioral deficits in Alzheimer’s disease mouse models relates to another action of the versatile substance. “Neuritic plaques in the brains are one of the pathological hallmarks of Alzheimer’s disease (AD).

Amyloid β-protein (Aβ), the central component of neuritic plaques, is derived from β-amyloid precursor protein (APP) after β- and γ-secretase cleavage. The molecular mechanism underlying the pathogenesis of AD is not yet well defined, and there has been no effective treatment for AD. Valproic acid (VPA) is one of the most widely used anticonvulsant and mood-stabilizing agents for treating epilepsy and bipolar disorder. We found that VPA decreased Aβ production by inhibiting GSK-3β–mediated γ-secretase cleavage of APP both in vitro and in vivo. VPA treatment significantly reduced neuritic plaque formation and improved memory deficits in transgenic AD model mice. We also found that early application of VPA was important for alleviating memory deficits of AD model mice. Our study suggests that VPA may be beneficial in the prevention and treatment of AD.”
The 2010 review article Valproic acid as a promising agent to combat Alzheimer’s disease furthers the advocacy of valproic acid as a treatment for AD, and provides an explanation of its actions that are highly relevant for treatment of AD. “Alzheimer’s disease (AD) is one of the most threatening diseases to the elderly population at present. However, there is no yet efficient therapeutic method to AD. Recently, accumulating evidence indicates that valproic acid (VPA), a widely used mood stabilizer and antiepileptic drug, has neuroprotective potential relevant to AD.

Moreover, VPA can induce neurogenesis of neural progenitor/stem cells both in vitro and in vivo via multiple signaling pathways. Therefore, it is suggested that VPA is a promising agent to combat AD.” The operant word here that I will return to is “neurogenesis,” the birth of new neurons through differentiation of neural progenitor cells.

Molecular biology, genetic and epigenetic properties of VPA

So what is going on with valproic acid? Starting out with a sleep-helping plant extract going on to control of seizures and then on to mood stabilization and to possible control of retinitis pigmentosa and further to possible control of Alzheimer’s Disease – what else can it do? What else it can do as we will see includes possible treatment of Parkinson’s Disease and multiple cancers and assistance in regenerating damaged spinal cords through promoting the proper kind of stem cell differentiation. But first I want to discuss a few of the more newly-discovered biochemical properties of valproic acid that gives it such versatile pluripotency.
The major properties of valproic acid that make it interesting to today’s researchers were not known to exist more than 10 to 30 years ago. They are: a) valproic acid increases the activity of the neurotransmitter Gamma Amino Butyrate (GABA through several mechanisms, b) VPA is a histone deacetylase inhibitor, c) VPA induces the mobilization of heat shock proteins, HSP70 in particular , and d) VPA promotes the selective differentiation of certain stem and progenitor cells.

 

Alzheimer’s Death Rate Steadily Increasing

Alzheimer’s Death Rate Steadily Increasing; FDA Offers New Guidance
Mortality from Alzheimer’s disease has steadily increased during the last 30 years based on data compiled by the Centers for Disease Control and Prevention (CDC). In 2010, Alzheimer’s disease was the underlying cause for a total of 83,494 deaths and was classified as a contributing cause for an additional 26,488 deaths.
An estimated 5.4 million Americans have Alzheimer’s disease. The cost of health care for people with Alzheimer’s disease and other dementias was estimated to be 200 billion dollars in 2012, including 140 billion dollars in costs to Medicare and Medicaid. This cost is expected to reach up to 1.1 trillion dollars in 2050.
The risk of dying from Alzheimer’s disease significantly increases with age. Alzheimer’s disease is the sixth leading cause of death in the U.S. and is the fifth leading cause among people over the age of 65 years. Data from the National Vital Statistics System demonstrates that age-adjusted death rate from Alzheimer’s disease increased by 39% from 2000–2010 in the U.S.
In 2010, the population aged 85 years and older was 50 times more likely to die from Alzheimer’s disease than individuals aged 65–74 years. Americans 85 years and older were five times more likely to die from Alzheimer’s disease than those between the ages of 75 and 84 years.
Overall, women had a 30% higher risk of dying (27.3 per 100,000 population) from Alzheimer’s disease than men (21). The highest mortality rate from Alzheimer’s disease was observed in non-Hispanic white women (28.9) and non-Hispanic white men (22) compared to other races of the same gender. Among the non-Hispanic white population the risk of dying from Alzheimer’s disease is 26% higher than among the non-Hispanic black population. Similarly, the age-adjusted death rate is 43% higher for the non-Hispanic white population compared to the Hispanic origin population.
Alzheimer’s disease death rates vary widely across states. In 2010, among all the states and the District of Columbia, thirty one states showed death rates from Alzheimer’s disease that were above the national rate (25.1). States with the highest age-adjusted death rates were Washington (43.6), Tennessee (38.5), and North Dakota (37.2).
According to data collected from 2000–2010, Alzheimer’s disease mortality varies by age, sex, race, Hispanic origin, and geographic area.
Currently there is no cure for Alzheimer’s disease but there are pharmacological treatments to help with cognitive and behavioral symptoms. Reversible cholinesterase inhibitors such as Aricept, Exelon, and Razadyne increase the levels of acetylcholine in the brain by inhibiting acetylcholinesterase. Namenda, an N-methyl-D-aspartate receptor antagonist, is approved to treat moderate to severe Alzheimer’s disease. Keeping in mind the different needs for this population, these medications are available in other formulations besides pills such as the Exelon Patch and Namenda Oral Solution.
With regards to early detection, In April 2012, the FDA approved Eli Lilly and Company’s Amyvid (florbetapir F 18 injection), a radioactive diagnostic agent indicated for brain imaging of beta-amyloid plaques in patients with cognitive impairment who are being evaluated for Alzheimer’s disease and other causes of cognitive decline. A positive Amyvid scan indicates moderate to frequent amyloid plaques are present; this amount of amyloid plaque is present in patients with Alzheimer’s disease, but may also be present in patients with other types of neurologic conditions and in older people with normal cognition.
Despite this progress more measures need to be taken for this patient population. The FDA recently issued a proposal to assist companies developing new treatments for patients in the early stages of Alzheimer’s disease, before the onset of noticeable (overt) dementia. The new guidance explains the FDA’s current thinking about the way researchers can identify and select patients with early Alzheimer’s disease, or those who are at risk of developing the disease, for participation in clinical trials.
In recent years, the research community has tried to find ways to identify these patients using criteria that are based on biological indicators. Researchers have also tried to develop sensitive clinical measures that can detect subtle mental decline. However, because patients with early Alzheimer’s disease have little-to-no impairment of global functioning, it is difficult to assess changes in function in these patients. This can make it difficult to determine if a given treatment’s effect is clinically important.
For more information visit http://www.cdc.gov/nchs/data/databriefs/db116.htm.

True Story
In care homes in the bayarea, I have experienced and saw how Alzheimer’s disease (AD) condition worsens each day. Seniors with AD have an average of 8 medications per day. Agitation and mental decline are prevalent. Some of them have problems sleeping while some of them have limited body movements depending on the severity of their condition. Some of the male AD clients have more adverse effects with medications. Before being admitted to a carehomes, most of them have been living at their homes with chronic issues such as constipation, sleep disorders, obesity, skin problems and heart and vascular-related problems.
Connie Dello Buono, Motherhealth Inc, caregiving for bayarea homebound seniors 408-854-1883

Viral infection affects the vascular system and the brain

Past infections (Chlamydia pneumoniae, Helicobacter pylori, cytomegalovirus, and herpes simplex virus 1 and 2) may contribute to vascular risks and cognitive impairment (brain, behavior and computation)
Objective: We hypothesized that infectious burden (IB), a composite serologic measure of exposure to common pathogens (i.e., Chlamydia pneumoniae, Helicobacter pylori, cytomegalovirus, and herpes simplex virus 1 and 2) associated with vascular risk in the prospective Northern Manhattan Study (NOMAS), would also be associated with cognition.
Methods: Cognition was assessed using the Mini-Mental State Examination (MMSE) at enrollment and the modified Telephone Interview for Cognitive Status (TICS-m) at annual follow-up visits. Adjusted linear and logistic regressions were used to measure the association between IB index and MMSE. Generalized estimating equation models were used to evaluate associations with TICS-m and its change over time.
Conclusion: A measure of IB associated with stroke risk and atherosclerosis was independently associated with cognitive performance in this multiethnic cohort. Past infections may contribute to cognitive impairment.
Reference: Neurology March 26, 2013 vol. 80 no. 13 1209-1215 http://www.neurology.org/content/80/13/1209.abstract

Background
Circulatory_system
CIRCULATORY SYSTEM FUNCTION
Transportation of the substances necessary to maintain cellular metabolism is one of two main functions of the circulatory system. In conjunction with the respiratory system, red blood cells by the name of erythrocytes are responsible for the transportation of oxygen which are systematically delivered to the cells waiting throughout the body. The human body takes a breath, which enters the lungs. In the lungs, the oxygen molecules attach themselves to hemoglobin molecules, which reside within the erythrocytes, and then make their way via transport by these cells to cells in need of oxygen. Once the cells have used the oxygen which has been delivered, the carbon dioxide that they have produced are then transported back to the lungs and expelled in exhaled air.

The blood and lymph vessels work in conjunction with the digestive system in order for the circulatory system to perform the delivery of nutrition. When food is eaten it is broken down by the digestive system and the nutrients are absorbed through the wall of the intestines, which is then picked up by the blood vessels and carried off to the cells requiring the nutrition with a pit stop through the liver for nutrient absorption and toxic cleansing.

The wastes associated with excess waters, ions, plasma, and metabolic waste produced by the cells which were delivered their nutrients, are then filtered through capillaries which belong to the kidneys. From there wastes enter the kidney tubes and are excreted in urine.

The circulatory system is also responsible for the transportation of hormones through the blood stream. This contributes to the regulatory process of maintaining health of the endocrine system.

The second basic function associated with the circulatory system involves protection. It effectively protects against both injury and disease through clotting, white blood cells, and the process of phagocytosis. White blood cells called leukocytes fight off disease and foreign material in the body. The body becomes feverish in this action as it works harder to produce a greater number of leukocytes.

The body’s natural ability to clot prevents excessive bleeding when blood vessels are harmed or damaged. Excessive damage may cause bleeding faster than the body can create clotting agents, but in most cases the clotting agents cease bleeding for long periods of time.

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Barley Grass Neutralizes Pesticides In Vitro

Clinical Research: Barley Grass Supports Cardiovascular Function

Bob Terry, PhD

OXNARD, CA, May 9, 2003 – People who regularly consume powdered organic barley grass juice supplements could be providing a boost to their cardiovascular system, according to research recently published in the peer-reviewed scientific journal, Diabetes and Metabolism (2002, Vol. 28, 107-114).

Ya-Mei Yu and Chingmin E. Tsai from Fu Jen University in Taipei together with fellow Taiwanese researchers from China Medical College in Taichung found in a clinical study that supplementation with barley grass helped reduce the levels of cholesterol and oxygen free-radicals in the blood of type 2 diabetics.

In the study, 36 randomly selected type 2 diabetics were randomly assigned to receive daily supplements of barley grass, a combination of vitamin C and E or a combination of barley grass and vitamins C and E for four weeks. Past research has indicated that antioxidants vitamin C and E when taken together may promote cardiovascular function.

The researchers found that supplementation with barley grass reduced the levels of total cholesterol, LDL-cholesterol, and oxygen free-radicals, in addition to protecting LDL-vitamin E content and inhibiting LDL oxidation. The authors noted that barley grass “acts as a free radical scavenger.” Particularly noteworthy are the data showing barley grass, when taken with vitamins C and E, more effectively lowers the level of free radicals than either barley grass or the vitamins when taken alone. The researchers concluded that supplementation with barley grass in combination with antioxidative vitamins may have a protective effect and promote healthy cardiovascular function.

The results of ongoing clinical studies appear to support and extend the findings that barley grass supplementation may lower blood levels of cholesterol and free radicals.

“For individuals concerned about their cardiovascular health, this study indicates that they would be well advised to focus on a diet with lots of green foods, particularly organic barley grass.” said Dr. Richard M. Gold, Ph.D., L.Ac., author and Professor at Pacific College of Oriental Medicine.

YH Products Co. of Oxnard, California provided the barley grass supplements for this study. YH Products Co. manufactures Green Magma (distributed by Green Foods Corporation). Green Magma is made with powdered organic barley grass juice, containing vitamins, minerals, antioxidants, amino acids, proteins, active enzymes and chlorophyll.

Clinical Research: Green Magma Helps Lower LDL Oxidation and Free Radical Activity in the Blood, and Supports Normal Levels of Cholesterol

Bob Terry, PhD

(August 16, 2005) In the last twenty-five years researchers have published a number of in vitro and in vivo laboratory studies demonstrating that Green Magma and its constituents exhibit potent antioxidant activity, cleansing actions, and cardiovascular support properties. In addition, a series of clinical studies have been published showing evidence that Green Magma provides support for the cardiovascular system in both healthy individuals in those with blood sugar or blood lipid concerns.

Clinical studies performed since 2002 by Dr. Ching-Min Tsai from the Graduate Institute of Nutrition and Food Science at Fu Jen University and the Department of Bioscience Technology at Chung Yuan University (both in Taipei, Taiwan) and colleagues have demonstrated that dietary changes including daily supplementation with Green Magma may provide several important benefits for cardiovascular function.

Normal blood flow through our bodies is essential for optimal health. While dietary, lifestyle, and genetic factors all play a role in cardiovascular function, dietary changes may offer a relatively convenient means of promoting cardiovascular function, normal blood flow, and enhanced quality of life.

I. Support for Normal Cholesterol Levels and Inhibition of LDL Oxidation with a Diet Rich in Poly- or Mono-unsaturated Fatty Acids and Barley Grass Juice Powder.

Liu WC, Tsai CE. Young Barley Leaf Prevents LDL Oxidation in Humans. Food Science and Agricultural Chemistry [published by The Chinese Institute of Food Science and Technology] Vol. 4 (3): 110-116 (2002).

SUMMARY: The results show that daily consumption of a diet rich in poly-unsaturated fatty acids (PUFA) from soybean oil reduces serum total cholesterol, LDL-C and HDL-C, but not the level of LDL oxidation. Adding barley grass juice powder to the soybean oil-enriched diet enhances its cholesterol-lowering effect and lowers LDL oxidation. While mono-unsaturated fatty acids (MUFA) from olive oil had no effect on total serum cholesterol, LDL-C or HDL-C, MUFA lowered the oxidation of LDL and this effect was enhanced by the addition of barley grass juice powder. Therefore, together with a diet rich in poly- or mono-unsaturated fatty acids, 15 g of barley grass juice powder per day as part of the diet may help support cardiovascular activity by promoting normal cholesterol levels and reducing the oxidation of LDL.

II. LDL Cholesterol and LDL Oxidation Reduced in Type 2 Diabetic Patients Receiving an Olive Oil-enriched Diet Supplemented with Barley Grass Juice.

Yu YM and Tsai CE. LDL cholesterol and oxidation are significantly reduced in type 2 diabetic patients receiving a barley leaf essence supplemented olive oil diet. Food Science and Agricultural Chemistry [published by The Chinese Institute of Food Science and Technology] Vol. 5 (1): 1-6 (2003).

SUMMARY: An intake of olive oil together with a dietary supplement of young barley grass juice may be useful as part of the nutritional management of patients with type 2 diabetes since it increases the monounsaturated fatty acid composition of LDL, decreases whole blood free radical activities, increases the vitamin E content of LDL, and reduces the susceptibility of LDL to oxidation.

III. Barley Grass Juice Powder, Alone or in Combination with Vitamins C and E, Lowers Free Radical Activity and Inhibits LDL Oxidation in Type 2 Diabetes.

Yu YM, Chang WC, Chang CT, Hsieh CL, and Tsai CE. Effects of barley leaf extract and antioxidative vitamins on LDL oxidation and free radical scavenging activities in type 2 diabetes. Diabetes Metab Vol. 28 (2): 107-114 (2002).

SUMMARY: The results indicate that supplementation with barley grass juice may help to lower cholesterol, scavenge oxygen free radicals, spare the LDL-vitamin E content, and inhibit LDL oxidation. Furthermore, there appears to be a synergistic inhibition of small, dense-LDL oxidation with the combination of barley grass juice and vitamins C and E, an effect that may promote good vascular function.

IV. Barley Grass Juice or Adlay Reduces Plasma Lipids and LDL Oxidation in Hyperlipidemic Smokers and Non-Smokers.

Yu YM, Chang WC, Liu CS and Tsai CM. Effects of young barley leaf extract and adlay on plasma lipids and LDL oxidation in hyperlipidemic smokers. Biol. Pharm. Bull. Vol. 27 (6): 802-805 (2004).

SUMMARY: Supplementation with either BL or adlay can decrease total and LDL cholesterol as well as susceptibility of LDL-C to oxidation in hyperlipidemic smokers and non-smokers. Barley leaf extract (barley grass juice) had a stronger antioxidative effect than adlay and the effects of either BL or adlay are less pronounced in smokers

Note: The barley grass juice powder (referred to as “barley leaf essence”, “barley leaf extract”, or “barley leaf”) used in all four of the studies described was provided by YH Products, the manufacturing division of Green Foods Corporation, located in Oxnard, California.

Barley Grass Neutralizes Pesticides In Vitro

Bob Terry, PhD

Health conscious consumers today are looking for more than wholesome, nutritious food to maintain good health, they also want to avoid the ever-increasing levels of pesticides and other chemicals in our environment. While periodic use of internal cleansing programs may help to eliminate pesticide residues, the best solution is to gently cleanse our bodies every day through our diet. Therefore, optimal nutrition requires foods that supply us with all the nutrients necessary for cellular metabolism and that also help us cleanse our bodies daily.

In 1978, Dr. Yoshihide Hagiwara revealed the ability of our barley grass extract Green Magma to degrade an insecticide (malathion), and two chemical food additives (sorbic acid and BHT) [1] when mixed directly with these substances in an aqueous solution. Heating Green Magma caused it to lose its ability to breakdown either malathion or sorbic acid indicating that enzyme activity in Green Magma may be responsible for its actions. However, heat treatment does not affect Green Magma’s ability to degrade BHT, which led Dr. Hagiwara to suggest that the BHT molecule may be adsorbed onto proteins in Green Magma rather being metabolized through enzyme activity. The following year, Dr. Hagiwara and colleagues reported that barley grass juice contained numerous enzymes including superoxide dismutase, cytochrome oxidase, peroxidase, catalase, fatty acid oxidase, and transhydrogenase [2] some of which may play a role in neutralizing pesticides and chemical additives in the body.

In the 1990’s, Dr. Shibamoto and Dr. Hagiwara isolated, identified, and studied the properties of a potent bioflavonoid antioxidant, named glycosylisovitexin (GIV), in young barley grass [3]. They showed that GIV was particularly effective in preventing the free radical oxidation of fatty acids, fish oils, and lecithin caused by ultraviolet light or by chemically induced oxidative reactions in blood [4]. GIV was also found to be effective in preventing the formation of two oxidation products of alcohol, acetaldehyde and malonaldehyde [5]. These two substances may be responsible for some of the unwanted effects of alcohol consumption.

Subsequent research published by Dr. Shibamoto along with Dr. Hagiwara and colleagues, demonstrated that young barley grass juice effectively degraded a variety of organophosphorus pesticides in vitro including malathion, chlorpyrifos, guthion, diazinon, methidathion, and parathion [6]. Incubation of the individual pesticides with a 3% solution of barley grass juice for several hours resulted in the complete degradation of both malathion and chlorpyrifos along with breakdown of parathion by 75%; diazinon by 54%; guthion by 41%; and methidathion by 23%. They also confirmed Dr. Hagiwara’s previous finding that barley grass juice’s ability to break down malathion is lost when barley grass is heated to 120O C, most likely due to destruction of enzyme activity by heat. Further research is necessary to understand the manner in which barley grass juice degrades pesticides.

Dr. Shibamoto and colleagues are continuing their research on the possible ways in which organic Green Magma may help us cleanse our bodies in a natural and effective manner.

In summary, research is helping to better understand why Green Magma provides the many benefits that thousands of regular consumers of Green Magma already know about — increased energy levels, improved digestion, better looking hair, skin and nails – all indications of good nutrition.

References:

  1. Hagiwara, Y. Study on green juice powder of young barley (Hordeum vulgare L) leaves II: Effect on several food additives, agricultural chemicals, and a carcinogen. Presented at the 98th National Meeting of the Japanese Society of Pharmaceutical Science (1978).
  2. Hagiwara, Y., Sayuki, S., Miyauchi, T., Otake,H., Abe, S., Kuramoto, M., and Takada, K. Study on green barley extract. Presented at the 99th National Meeting of the Japanese Society of Pharmaceutical Science, Sapporo (1979).
  3. Osawa, T., Katsuzaki, H., Hagiwara, Y., and Shibamoto, T. A novel antioxidant isolated from young green barley leaves. 1992, J. of Agricultural and Food Chemistry, Vol. 40 (7): 1135-1138.
  4. Miyake, T. and Shibamoto, T. Inhibition of Malonaldehyde and acetaldehyde formation from blood plasma oxidation by naturally occurring antioxidants. 1998, J. of Agricultural and Food Chemistry, Vol. 46 (9): 1135-1138.
  5. Nakajima, S., Hagiwara, Y., Hagiwara, H., and Shibamoto, T. Effect of the Antioxidant 2″-O-Glycosylisovitexin from young green barley leaves on acetaldehyde formation in beer stored at 50 degree C for 90 days. 1998, Journal of Agricultural and Food Chemistry, Vol. 46 (4): 1529-1531.
  6. Durham, J., Ogata, J., Nakajima, S., Hagiwara, Y., and Shibamoto, T. Degradation of organophosphorus pesticides in aqueous extracts of young green barley leaves (Hordeum vulgare L). 1999, J. of the Science of Food and Agriculture, Vol. 79: 1311-1314.

Reference: www.greenfoods.com

Leucine is one of the 8 essential amino acids esp good for athletes

Leucine is one of the 8 essential amino acids that needs to be supplied from dietary sources.

Evidences from several studies, mostly conducted on rats, suggest that leucine is involved in protein synthesis in skeletal muscles, and can inhibit protein degradation in skeletal muscles and liver. It is also an important component of hemoglobin.

Leucine rich food sources include legumes such as soy beans and cowpea and animal products such as beef and fish. Below is a list of select food sources which contain leucine with estimates of their leucine content. The foods are ordered from high to low content.

 

Leucine food sources

Leucine content (grams/ 100 gram food)

Soybeans, mature seeds, raw

2.97

lentils, raw

2.03

cowpea, catjang, mature seeds, raw

1.83

Beef, round, top round, separable lean and fat, trimmed to 1/8″ fat, select, raw

1.76

Beef, top sirloin, separable lean only, trimmed to 1/8″ fat, choice, raw

1.74

Peanuts, all types, raw

1.67

Salami, Italian, pork

1.63

Fish, salmon, pink, raw

1.62

Crustaceans, shrimp, mixed species, raw

1.61

Chicken, broilers or fryers, thigh, meat only, raw

1.48

Nuts, almonds

1.47

Egg, yolk, raw, fresh

1.40

Chickpeas (garbanzo beans, bengal gram), mature seeds, raw

1.37

Seeds, sesame butter, tahini, from raw and stone ground kernels

1.36

Chicken, broilers or fryers, wing, meat and skin, raw

1.29

flax seed, raw

1.24

Nuts, walnuts, english

1.17

Egg, whole, raw, fresh

1.09

Egg, white, raw, fresh

1.02

Sausage, Italian, pork, raw

0.96

Milk, sheep, fluid

0.59

Pork, fresh, separable fat, raw

0.40

Hummus

0.35

Milk, goat, fluid

0.31

Milk, whole, 3.25% milkfat

0.27

Soy milk, fluid

0.24

asparagus

0.13

Snap beans, green, raw

0.11

Milk, human, mature, fluid

0.10

 

Cashew Apple Juice supplementation enhanced fat oxidation during exercise

During the exercise in both trained and untrained groups, there were lower carbohydrate (CHO) and higher fat oxidation rates and contributions to total energy expenditure after the CAJ supplementation compared to the PLA supplementation (p<0.05). These values were greater in the trained group than the untrained group except CHO oxidation rates (p<0.05), which were not significantly different. Moreover, in both trained and untrained groups, resting plasma vitamin C concentrations were significantly higher after the CAJ supplementation compared to the PLA supplementation, without any change after the PLA supplementation. These values were greater in the trained group than the untrained group (p<0.05). There were no significant differences in glucose, insulin or lipid concentrations between the groups’ blood samples.

Conclusion

The findings of this study suggest that CAJ supplementation enhanced fat oxidation during exercise may enhance endurance performance, but specific studies are needed to assess this possibility.

Keywords:

Vitamin C; Leucine; Endurance; Fat oxidation rate; Athletes

Background

Carbohydrate (CHO) plays a major role as an energy source for active muscle during high-intensity exercise [1]. Moreover, the increased capacity of fat utilization is known to improve exercise capacity [2]. Therefore, an intervention which increases fat utilization may be important for endurance of athletes. Diet and exercise training are known to increase fat utilization during exercise [3]. It is not known whether this can be enhanced further by dietary supplement interventions which increase fat oxidation in untrained individuals.

Endurance training has been shown to improve fat utilization [4]. Possible mechanisms proposed by a recent study involve changes in fatty acid transport protein content in whole muscle (FAT/CD36 and FABPpm), sarcolemmal (FABPpm) and mitochondrial (FAT/CD36) membranes in female human skeletal muscles [5].

Diets containing antioxidants and branch chain amino acids (BCAAs) are reported to have potential effects on fat utilization [6,7]. The antioxidant, vitamin C is perhaps one of the most widely used vitamins in the world today. Johnston et al. [6] reported that vitamin C is important for fat oxidation. This may be due to ascorbic acid (vitamin C) being a co-factor for the biosynthesis of carnitine, a molecule required for fatty acid oxidation [8]. This may contribute to increased utilization of fatty acids in triglycerides as a fat source for muscle contraction, resulting in lower serum triglyceride levels [9]. Leucine, the most utilized BCAA, was found to enhance fat oxidation in obese animals and overweight or obese subjects [10,11]. De Araujo et al. [12] showed that supplementation with BCAAs (i.e. leucine, isoleucine, or valine) increases hepatic and muscle glycogen concentrations in exercised rats, suggesting greater fat utilization during exercise [7]. A previous study, however, reported an opposite result [13]. This discrepancy may be due to a different nutritional status, as the rats in Cheng’s study were leucine deficient whereas animals or subjects in other studies were supplemented with leucine. Cheng’s study reported that leucine deficiency increased triglyceride lipolysis, leading to increased fat mobilization via cAMP-PKA-HSL in white adipose tissue [13]. This was supported by the results of upregulation of AdrB3 expression, of AdrB3, the main isoform of β-adrenoceptors in the adipose tissue [13]. Together with the effects on energy expenditure (EE) enhancement in brown adipose tissue and lipogenesis suppression, the leucine deficiency contributed to fatty acid mobilization, resulting in increased fat loss.

Cashew apple is a product of cashew nut manufacturing. It is popularly consumed in the orm of juice which comprises many nutritional components, including vitamin C and BCAAs [14,15]. For this study it was hypothesized that cashew apple juice (CAJ) would further enhance fat oxidation during high-intensity exercise, adding to the effects of training. Therefore, the effect of CAJ supplementation on substrate utilization during high-intensity exercise in trained and untrained subjects was investigated.

 

Reference: http://www.jissn.com/content/10/1/13