Vegetable compound could have a key role in ‘beeting’ Alzheimer’s disease
Note to journalists: Please report that this research will be presented at a meeting of the American Chemical Society.
A press conference on this topic will be held Tuesday, March 20, at 9 a.m. Central time in the Ernest N. Morial Convention Center. Reporters may check-in at the press center, Great Hall B, or watch live on YouTube http://bit.ly/ACSLive_NOLA. To ask questions online, sign in with a Google account.
NEW ORLEANS, March 20, 2018 — A compound in beets that gives the vegetable its distinctive red color could eventually help slow the accumulation of misfolded proteins in the brain, a process that is associated with Alzheimer’s disease. Scientists say this discovery could lead to the development of drugs that could alleviate some of the long-term effects of the disease, the world’s leading cause of dementia.
The researchers are presenting their work today at the 255th National Meeting & Exposition of the American Chemical Society (ACS). ACS, the world’s largest scientific society, is holding the meeting here through Thursday. It features more than 13,000 presentations on a wide range of science topics.
“Our data suggest that betanin, a compound in beet extract, shows some promise as an inhibitor of certain chemical reactions in the brain that are involved in the progression of Alzheimer’s disease,” says Li-June Ming, Ph.D. “This is just a first step, but we hope that our findings will encourage other scientists to look for structures similar to betanin that could be used to synthesize drugs that could make life a bit easier for those who suffer from this disease.”
More than 5 million Americans have Alzheimer’s disease, according to the National Institute on Aging. Its incidence rises with age, affecting one in 10 Americans 65 and older, and one in three by age 85. Scientists are still trying to figure out what causes this progressive and irreversible brain disorder. But one prime suspect is beta-amyloid, a sticky protein fragment, or peptide, that accumulates in the brain, disrupting communication between brain cells called neurons. Much of this damage occurs, Ming says, when beta-amyloid attaches itself to metals such as iron or copper. These metals can cause beta-amyloid peptides to misfold and bind together in clumps that can promote inflammation and oxidation — a process similar to rusting — in nearby neurons, eventually killing them.
Previous research conducted by other scientists suggests that beetroot juice can improve oxygen flow to the aging brain and possibly improve cognitive performance. Building on this work, Ming, Darrell Cole Cerrato and colleagues at the University of South Florida wanted to find out if betanin, a beet compound used in commercial dyes that readily binds to metals, could block the effects of copper on beta-amyloid and, in turn, prevent the misfolding of these peptides and the oxidation of neurons.
In laboratory studies, the researchers conducted a series of experiments involving 3,5 di-tert-butylcatechol, or DTBC, a compound that is used as a model substance for tracking the chemistry of oxidation. Using visible spectrophotometry, the scientists measured the oxidative reaction of DTBC when exposed to beta-amyloid only, beta-amyloid bound to copper, and copper-bound beta-amyloid in a mixture containing betanin.
On its own, beta-amyloid caused little or no oxidation of DTBC. However, as expected, beta-amyloid bound to copper induced substantial DTBC oxidation. But when betanin was added to the copper-bound beta-amyloid mixture, the researchers found oxidation dropped by as much as 90 percent, suggesting that misfolding of the peptides was potentially suppressed.
“We can’t say that betanin stops the misfolding completely, but we can say that it reduces oxidation,” Cerrato says. “Less oxidation could prevent misfolding to a certain degree, perhaps even to the point that it slows the aggregation of beta-amyloid peptides, which is believed to be the ultimate cause of Alzheimer’s.”
Ming acknowledges funding from the National Science Foundation.
The American Chemical Society, the world’s largest scientific society, is a not-for-profit organization chartered by the U.S. Congress. ACS is a global leader in providing access to chemistry-related information and research through its multiple databases, peer-reviewed journals and scientific conferences. ACS does not conduct research, but publishes and publicizes peer-reviewed scientific studies. Its main offices are in Washington, D.C., and Columbus, Ohio.This is something I just ‘picked up’ when reading “The Week” news magazine! There was a short write-up that suggests new breakthroughs in medical brain studies (April 6, p. 21) to help ward off Alzheimer’s disease. The article states that:Scientists at the University of South Florida found that betanin,the compound that gives the beet root vegetable its rich red color,could help prevent protein pieces called beta-amyloid from forming harmful plaque in the brain—a hallmark of the neuro-degenerative disease. This plaque usually occurs when beta-amyloid binds to metals in the brain such as iron and copper; these metals cause the protein to form clumps that can trigger inflammation and oxidation,which destroys nerve cells. In a series of esperiments, the researchers found that when beta-amyloid bound to copper was exposed to betanin, oxidation dropped by up to 90 percent.They are hopeful that other scientists look further into thislNow my footnote! I have always had an appreciation of pickled beets and keep an open jar in my frig. Very often I will eat a few—almost as an appetizer while cooking dinner, as Andy doesn’t care for beets! This might be a glimmer of a reason why I have been spared up to this point!!