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Blueberries, red grapes may boost body's immune function

Updated: Sep 17, 2013 02:22 PM
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TUESDAY, Sept. 17 (HealthDay News) -- Red grapes and blueberries may give your immune system a boost, according to a new study.

Researchers found that both fruits contain compounds called stilbenoids, which work with vitamin D to increase expression of the human cathelicidin antimicrobial peptide (CAMP) gene, which is involved in immune function.

The stilbenoid compounds included resveratrol in red grapes and pterostilbene in blueberries.

"Out of a study of hundreds of compounds, just these two popped right out," Adrian Gombart, a principal investigator at the Linus Pauling Institute at Oregon State University, said in a university news release.

"Their synergy with vitamin D to increase CAMP gene expression was significant and intriguing," said Gombart, an associate professor in the university's college of science. "It's a pretty interesting interaction."

Gombart and colleagues noted, however, that these findings were made in laboratory cell cultures and do not prove that eating blueberries and red grapes would boost a person's immune function.

The study was published Sept. 17 in the journal Molecular Nutrition and Food Research.

The CAMP gene has been shown to play a key role in the innate immune system -- the body's first line of defense that gives it the ability to fight bacterial infection. The response is especially crucial as many antibiotics become less effective.

Previous research has found a strong association between adequate vitamin D levels and the function of the CAMP gene. This new study suggests that certain other compounds may play a role as well.

More information

The U.S. National Institute of Allergy and Infectious Diseases has more about the immune system.

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