Two new studies point to a wonderful way to ward off Alzheimer's disease and other forms of age-related memory loss.
By Tom Jacobs
Two new studies suggest that substances usually associated with dulling the mind -- marijuana and red wine -- may help ward off Alzheimer's disease and other forms of age-related memory loss. Their addition comes as another study dethrones folk remedy ginkgo biloba as proof against the disease.
At a November meeting of the Society of Neuroscience in Washington, D.C., researchers from Ohio State University reported that THC, the main psychoactive substance in the cannabis plant, may reduce inflammation in the brain and even stimulate the formation of new brain cells.
Meanwhile, in the Nov. 21 issue of the Journal of Biological Chemistry, neurologist David Teplow of the University of California, Los Angeles reported that polyphenols -- naturally occurring components of red wine -- block the formation of proteins that build the toxic plaques thought to destroy brain cells. In addition, these substances can reduce the toxicity of existing plaques, thus reducing cognitive deterioration.
Together, the studies suggest scientists are gaining a clearer understanding of the mechanics of memory deterioration and discovering some promising approaches to prevention.
Previous research has suggested that polyphenols -- which are found in high concentrations in tea, nuts and berries, as well as cabernets and merlots -- may inhibit or prevent the buildup of toxic fibers in the brain. These fibers, which are primarily composed of two specific proteins, form the plaques that have long been associated with Alzheimer's disease.
UCLA's Teplow and his colleagues monitored how these proteins folded up and stuck to each other to produce aggregates that killed nerve cells in mice. They then treated the proteins with a polyphenol compound extracted from grape seeds. They discovered the polyphenols blocked the formation of the toxic aggregates.
"What we found is pretty straightforward," Teplow declared. "If the amyloid beta proteins can't assemble, toxic aggregates can't form, and, thus, there is no toxicity." If this also proves true in human brains, it means administration of the compound to Alzheimer's patients could "prevent disease development and also ameliorate existing disease," he said. Human clinical trials are upcoming.
http://www.alternet.org/drugreporter/110806/attacking_alzheimer%27s_with_red_wine_and_marijuana/
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