Compound from yeast shows promise in protecting against anthrax

BOSTON, Aug. 22 -- A compound from baker's yeast, used to make bread rise, may one day help protect people against deadly anthrax infections, according to researchers.

In laboratory tests, the compound, called WGP Beta Glucan, significantly increased the survival rate of mice infected with lethal anthrax spores. Researchers believe the compound can be developed into a potent drug that has a similar effect on humans. Their findings were presented today at the 224th national meeting of the American Chemical Society, the world's largest scientific society.

WGP Beta Glucan is a patented form of beta 1,3-glucan, a polysaccharide derived from the cell wall of baker's yeast and other natural sources. Beta 1,3-glucan's potential health benefits, particularly its immune-enhancing properties, have been the subject of numerous scientific studies.

The current study represents the first demonstration that a specific form of beta 1,3-glucan can enhance the immune system's ability to kill anthrax spores, and that it can do so orally, says Gary R. Ostroff, Ph.D., vice president of research and development at Biopolymer Engineering Inc., in Eagan, Minn.

The study involved 80 mice, all of which were infected with a lethal dose of deadly anthrax spores. Of the 20 that received a placebo treatment, 30 to 50 percent survived. Of the 60 mice given beta glucan, 75 to 100 percent survived, the researcher said.

Although the mechanism of the glucan compound is not completely understood, it appears to work by binding to and strengthening macrophages, immune cells that are the first line of defense against bacterial infection. As a result, the cells fight harder against infection. In the case of anthrax, the fortified macrophage cells appear to kill the bacterial spores before they have a chance to germinate and spawn the deadly toxins that can quickly overwhelm a less-protected immune system, the researcher explained.

Studies are planned to


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