This study used grape seeds

An extract from grape seeds forces laboratory leukemia cells to self destruct, or commit cell suicide, according to researchers from the University of Kentucky. Within 24 hours of exposure to the extract, three-quarters of leukemia cells die off.

The researchers say that this proves the value of natural compounds. In making their discovery, they teased apart the cell signaling pathway associated with use of grape seed extract that led to the cell-suicide. This self-destructive process, known as apoptosis, normally gets rid of damaged or aberrant cells.

New research in an animal model suggests that a diet high in inorganic phosphates, which are found in a variety of processed foods including meats, cheeses, beverages, and bakery products, might speed growth of lung cancer tumors and may even contribute to the development of those tumors in individuals predisposed to the disease.

Karen Kaplan reports in the L.A. Times on the crushingly disappointing results from a series of clinical trials that have shown that daily doses of vitamins and minerals have no effect on preventing strokes, heart disease or other ailments and in some cases, even cause harm.

Laboratory tests and initial studies in people suggested that lowly vitamins could play a crucial role in preventing some of the most intractable illnesses, especially in an aging population. The National Institutes of Health gave them the same treatment as top-notch pharmaceutical drugs, investing hundreds of millions of dollars in elaborate clinical trials designed to quantify their disease-fighting abilities.

Now the results from those trials are rolling in, and nearly all of them fail to show any benefit from taking vitamin and mineral supplements.

This month, two long-term trials with more than 50,000 participants offered fresh evidence that vitamin C, vitamin E and selenium supplements don’t reduce the risk of prostate, colorectal, lung, bladder or pancreatic cancer. Other recent studies have found that over-the-counter vitamins and minerals offer no help in fighting other cancers, stroke or cardiovascular disease.

Kaplan interviews Jeffrey Blumberg, director of the U.S. Department of Agriculture’s Antioxidants Research Laboratory at Tufts University in Boston. His research, she notes, has been funded in part by supplement makers.

Blumberg says, “You really do need vitamin E. You really do need vitamin C. You really do need seleniun,” adding, “Without them, you die.”

This begs the question of whether taking them in supplement form fends off illnesses.

“Blumberg and others now believe.” Kaplan writes, “that a combination of factors — including the versions of vitamins that were tested and the populations they were tested in — probably doomed the studies from the start.”

Kaplan also interviews Dr. Mary L. Hardy, medical director of the Simms/Mann UCLA Center for Integrative Oncology, “who focuses on the importance of diet and supplements for cancer patients.”

“‘You don’t eat a food that just has beta carotene in it,’” Hardy tells Kaplan. “What’s more, she said, vitamins manufactured into pills are not identical to vitamins that occur naturally in foods, so the clinical trials don’t test the exact compounds that may have been key in earlier studies.

Full story from L. A. Times December 21, 2008

Prenatal exposure to famine can lead to changes in the embryo’s genes that may affect the adult person’s health into midlife, according to researchers at Columbia University Mailman School of Public Health and the Leiden University Medical Center in the Netherlands. Their findings show a trickle-down effect from pregnant women to the DNA of their unborn children and the timeframe over which such early damage can operate.

Previous studies have suggested that adult disease risk may be associated with unsuitable or adverse environmental conditions early in development. The data for this study are first to show that early-life environmental conditions can cause what are called epigenetic (epi= “on” + genetic) changes in humans that persist throughout life.

In Holland in 1944-45 during World War II a food embargo led to famine. Research indicates that children conceived during the Dutch Hunger Winter experienced detrimental health effects six decades later. Pre-natal exposure to the famine has been associated with cardiovascular disease and diabetes in later life.

Separate, related studies suggest possible associations of specific pre-natal nutritional imbalances and even of maternal over-nutrition with other health conditions including cancer.

An anti-cancer compound in broccoli and cabbage, indole-3-carbinol, is undergoing clinical trials in men with prostate cancer and women with breast cancer because it was found to stop the growth of these cancers in mice.

Now scientists have discovered more about how it works. They’ve found that in breast cancer it lowers the activity of an enzyme associated with rapidly advancing cancer growth, according to a University of California, Berkeley, study appearing this week in the online early edition of Proceedings of the National Academy of Sciences.

The new findings are claimed as the first to explain how indole-3-carbinol (I3C) stops cell growth. This new understanding is expected to speed designs for improved versions of the chemical that would be more effective as a drug and could work against a broader range of breast as well as prostate tumors.

Canadian researchers report that men who eat fish several times a week may protect themselves from prostate cancer, while men who eat meat, ham or sausage 5 times a week may have a 3-fold increased risk of prostate cancer. These findings add to a growing body of evidence suggesting a relationship between diet and prostate cancer risk.

“Many studies have suggested that nutritional factors may affect prostate cancer development,” says Armen Aprikian, MD. of the urology division McGill University Health Centre, Montréal, Que. ” The aim of our study was to evaluate the relationship between dietary habits and prostate cancer detection.”

A large-scale prevention trial has shown no protective effect from vitamin E on prostate cancer or vitamin C supplementation on total cancer.

Research at the University of California, San Diego School of Medicine, led by Ajit Varki, M.D., has shown a new mechanism for how human consumption of red meat and milk products could contribute to the increased risk of cancerous tumors. In brief, people who consume animal products expose their own tissues to close contact with animal molecules.  This may set up an immune response.

The new findings suggest that inflammation resulting from a molecule introduced through consumption of red meat and milk could promote tumor growth. The results are published online this week in advance of print publication in the Proceedings of the National Academy of Sciences (PNAS).

Tomato paste

Tomato paste made from dried tomato powder may not strike you as the most delicious way to prepare this nutritious food, but new research suggests that this is the form in which tomatoes have most prostate cancer-prevention potential.

A positive anti-prostate cancer effect for tomato products has been suggested in many studies. This effect has often been attributed to lycopene. But it’s starting to look as though lycopene is only part of the story.

New cancer research from the University of Missouri, published in the June 1 issue of Cancer Research, suggests that dehydrating tomatoes and rehydrating the powder is key.