Archive for the ‘Antioxidant’ Category
- In: Antioxidant | Cancer | Diet | Vegetables
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A compound found in soybeans almost completely prevented the spread of human prostate cancer in mice, according to a study published in the March 15 issue of Cancer Research, a journal of the American Association for Cancer Research. Researchers say that the amount of the chemical, an antioxidant known as genistein, used in the experiments was no higher than what a human would eat in a soybean-rich diet.
To get more out of your next cup of tea, just add juice. A study found that citrus juices enable more of green tea’s unique antioxidants to remain after simulated digestion, making the pairing even healthier than previously thought. The study compared the effect of various beverage additives on catechins, naturally occurring antioxidants found in tea. Results suggest that complementing green tea with either citrus juices or vitamin C likely increases the amount of catechins available for the body to absorb. 
- In: Antioxidant | Diet | Fat | Fruits | health | Obesity | Vegetables
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Scientists in Taiwan are reporting new insights into why diets rich in fruits and vegetables reduce the risk of obesity. Their study focuses on healthful natural antioxidant compounds called flavonoids and phenolic acids.
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Selenium, an antioxidant included in multivitamin tablets thought to have a possible protective effect against the development of type 2 diabetes, may actually increase the risk of developing the disease, an analysis by researchers at the University at Buffalo has shown.
Results of a randomized clinical trial using 200 micrograms of selenium alone showed that 55 percent more cases of type 2 diabetes developed among participants randomized to receive selenium than in those who received a placebo pill.
- In: Anti-aging | Antioxidant | Diabetes | Diet | Life Extension | Longevity | Supplements
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Researchers said today they have identified the mechanism of action of lipoic acid, a remarkable compound that in animal experiments appears to slow down the process of aging, improve blood flow, enhance immune function and perform many other functions.
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- In: Antioxidant | Cancer | Diet | Green Tea | health | Supplements
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Researchers are adding to the list of cancer types for which pomegranates seem to halt growth. A recent study at the University of Wisconsin–Madison using a mouse model shows that consuming pomegranates could potentially help reduce the growth and spread of lung cancer cells or even prevent lung cancer from developing.
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Antioxidant found in many foods and red wine is potent and selective killer of leukemia cells
Posted on: April 26, 2007
- In: Antioxidant | Cancer | Diet | lymphoma | Supplements | Vegetables
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A naturally occurring compound found in many fruits and vegetables as well as red wine, selectively kills leukemia cells in culture while showing no discernible toxicity against healthy cells, according to a study by researchers at the University of Pittsburgh School of Medicine. These findings, which were published online March 20 in the Journal of Biological Chemistry and will be in press on May 4, offer hope for a more selective, less toxic therapy for leukemia.
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- In: Antioxidant | Cancer | Diet | Fruits | health | Supplements
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A compound found in blueberries shows promise of preventing colon cancer in animals, according to a joint study by scientists at Rutgers University and the U.S. Department of Agriculture. The compound, pterostilbene, is a potent antioxidant that could be developed into a pill with the potential for fewer side effects than some commercial drugs that are currently used to prevent the disease. Colon cancer is considered the second leading cause of cancer death in the United States, the researchers say.
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- In: Aging | Anti-aging | Antioxidant | caloric restriction | Diet | health | Life Extension | Longevity | metabolism | Mitochondria
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Caloric Restriction in non-obese people translates into less oxidative damage in muscle cells, according to a new study by scientists at Pennington Biomedical Research Center. As oxidative damage has been linked to aging, this could explain how limiting calorie intake without malnutrition extends life span.
Civitarese and colleagues found that indeed fewer calories can improve whole body metabolism in conjunction with an increase in SIRT1 gene expression in skeletal muscle. These results raise the possibility that SIRT1 may contribute to more efficient metabolism, less oxidative stress, and increase longevity in humans as it does in lower organism. (Credit: Image courtesy of Public Library of Science)
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Deep red tomatoes get their rich color from lycopene, a disease-fighting antioxidant. A new study, however, suggests that a special variety of orange-colored tomatoes provide a different form of lycopene, one that our bodies may more readily use.
Researchers found that eating spaghetti covered in sauce made from these orange tomatoes, called Tangerine tomatoes, caused a noticeable boost in this form of lycopene in participants’ blood.
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Oxidative damage in newly synthesized DNA plays a role in Parkinson’s disease
Posted on: February 27, 2007
- In: Aging | Antioxidant | DNA
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Oxygen is the quintessential two-edged sword of molecular biology: essential for (animal) life, but at the same time a perennial source of damage to macromolecules. Reactive oxygen species (ROS), arising from both external sources and the intrinsic metabolic machinery of the cell itself, have been implicated in many aspects of cellular aging.
Of particular interest to human beings, especially those living in the rapidly aging post-industrial Western nations, is the relationship between oxidative damage and neurodegenerative illness. While most of the age-related neurodegenerative diseases are caused by accumulation of protein aggregates, it is becoming evident that ROS play an important role in exacerbating the underlying pathologies: e.g., DNA oxidation arises early in the pathogenesis of Alzheimer’s disease; and oxidative damage to a key anti-oxidant defense protein may generate a pernicious positive-feedback loop in the initiating events of Parkinson’s disease.
Read rest of the story at Ouroboros site.
- In: Alzheimer's | Antioxidant | Brain | Neurons | Supplements | Vitamins
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Alzheimer’s disease (AD) is one of a number of neurodegenerative disorders in which brain cells damaged by naturally occurring chemicals known as reactive oxygen species (ROS) have been observed. However, whether this oxidative damage causes neurodegeneration or is a consequence of it has not been previously determined. A study appearing online on December 14, in advance of publication in the January print issue of the Journal of Clinical Investigation, indicates that oxidative damage is a factor contributing to neurodegeneration in a Drosophila model of neurodegenerative disorders such as AD.
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- In: Antioxidant | Cardiovascular | Diet | Green Tea | health | Heart Disease
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Research published online today in the European Heart Journal has found that the protective effect that tea has on the cardiovascular system is totally wiped out by adding milk.
Tests on volunteers showed that black tea significantly improves the ability of the arteries to relax and expand, but adding milk completely blunts the effect. Supporting tests on rat aortas (aortic rings) and endothelial (lining) cells showed that tea relaxed the aortic rings by producing nitric oxide, which promotes dilation of blood vessels. But, again, adding milk blocked the effect.
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Study Shows Abnormal Colon Growths Less Likely in Those Who Drink Red Wine
Posted on: November 9, 2006
- In: Antioxidant | Cancer | Diet | Resveratrol | Supplements
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People who drink three or more glasses of red wine a week are less likely to get the abnormal colon growths that can lead to cancer, according to a new study.
The study doesn’t prove red wine prevents or treats colon cancer, and the researchers aren’t recommending red wine for colon cancer prevention. But they suggest that a compound found in grapes and red wine – the antioxidant resveratrol — may cut the odds of getting abnormal colon growths that can become cancerous.
Read rest of the story at WebMD
- In: Aging | Alzheimer's | Anti-aging | Antioxidant | Diet | Memory | Vitamins
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A diet containing curry may help protect the aging brain, according a study of elderly Asians in which increased curry consumption was associated with better cognitive performance on standard tests.
Curcumin, found in the curry spice turmeric, possesses potent antioxidant and anti-inflammatory properties.
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- In: Alzheimer's | Antioxidant | Diet | Fruits | Memory | Neurons | Neuroscience
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Mothers have long exhorted their children to eat their fruit and vegetables. But once kids are beyond mom’s watchful eye, the hated greens often go the way of Barbie dolls and power rangers. Now, there’s another reason to reach for colorful fruits past adolescence.
Fisetin, a naturally occurring flavonoid commonly found in strawberries and other fruits and vegetables, stimulates signaling pathways that enhance long-term memory, report researchers at the Salk Institute for Biological Studies in this week’s Online Early Edition of the Proceedings of the National Academy of Sciences.
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Grape seed extract halts cell cycle, checking growth of colorectal tumors in mice
Posted on: October 21, 2006
- In: Antioxidant | Cancer | Diet | proteins | Supplements
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Chemicals found in grape seeds significantly inhibited growth of colorectal tumors in both cell cultures and in mice, according to researchers who have already demonstrated the extract’s anti-cancer effects in other tumor types.
Their study, published in the October 18 issue of Clinical Cancer Research, documented a 44 percent reduction of advanced colorectal tumors in the animals, and also revealed, for the first time, the molecular mechanism by which grape seed extract works to inhibit cancer growth. The authors found that it increases availability of a critical protein, Cip1/p21, in tumors that effectively freezes the cell cycle, and often pushes a cancer cell to self destruct.
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An article published in the August, 2006 issue of the American Diabetes Association journal Diabetes reported the findings of Xianwen Yi and Nobuyo Maeda of the University of North Carolina at Chapel Hill that giving alpha-lipoic acid to mice in whom diabetes was induced prevented the increase in cholesterol, atherosclerotic lesions and health deterioration that the disease would otherwise cause. Alpha-lipoic acid is a potent antioxidant nutrient that has been used to treat diabetic neuropathy, however, its effects in diabetic cardiovascular disease have not been completely evaluated.
- In: Alzheimer's | Antioxidant | Biotechnology | Brain | Diet | health | Memory | Nervous system
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If you think that your daily cups of coffee only provide you with alertness after you wake up or during the day, think again. Long-term intake of caffeine, the major constituent in coffee and tea, has been shown to reduce the risk of Alzheimer’s in mice that develop the disease.
In a study just published on-line in the Journal Neuroscience, researchers at the Byrd Alzheimer’s Institute in Tampa, Florida, are reporting that caffeine intake equivalent to five cups of coffee a day in humans, protects Alzheimer’s mice against otherwise certain memory impairment and reduces Alzheimer’s pathology in their brains.
- In: Antioxidant | Biotechnology | Cardiovascular | Diet | Nervous system | Supplements | Vitamins
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Two recent studies offer new evidence suggesting an alternative form of natural vitamin E can be taken by mouth and will reach the blood in humans at levels determined to protect against stroke and other diseases.
Vitamin E occurs naturally in eight different forms. The primary vitamin E on drugstore shelves is called tocopherol, or TCP. But another natural form of vitamin E surfacing as a potent neuroprotective agent in repeated Ohio State University Medical Center studies is tocotrienol, or TCT.
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Green tea and the ‘Asian Paradox’
Posted on: June 18, 2006
- In: Antioxidant | Cancer | Cardiovascular | Diet | Green Tea | Heart Disease
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There is a lower incidence of cardiovascular disease and cancer in Asia where people smoke heavily, which may be accounted for by high consumption of tea, particularly green tea, according to a review article published by a Yale School of Medicine researcher.
- In: Aging | Antioxidant | Biotechnology | Cell Biology | Cell Signaling | Genes | Neurons
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"A common molecular denominator in aging and many age-related diseases is oxidative stress," says the study's lead author Azad Bonni, MD, PhD, HMS associate professor of pathology. The skin of a bitten apple will brown because of its exposure to air, and in some ways that is a good metaphor for the damage that oxidative stress is causing to neurons and other types of cells over time.
How the oxidative-stress signals trigger these profound effects in cells has remained unclear. But Bonni and his research team, have now defined how a molecular chain-of-events links oxidative-stress signals to cell death in brain neurons.
Selenium, an essential dietary mineral that can act as an antioxidant when incorporated into proteins, has been shown in many studies to reduce the incidence of cancers — notably lung, colorectal and prostate.
Alan Diamond, professor of human nutrition at the University of Illinois at Chicago, and his colleagues report in the May 23 issue of the Proceedings of the National Academy of Sciences on research findings using specially bred transgenic mice that suggest it is the level of selenium-containing proteins in the body that is instrumental in preventing cancer, and that dietary selenium plays a role in stimulating the body's level of these selenoproteins.
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