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Type of Food Consumed can Influence Body’s Internal Biological Clock

by Kathy Jones on July 11, 2014 at 10:47 PM
 Type of Food Consumed can Influence Body’s Internal Biological Clock

A new study published in the journal Cell Reports has found that the type of food that you eat may affect the body's internal biological clock, with the researchers suggesting that their findings prove that dietary manipulation can be used to help patients with various conditions.

An internal biological or 'circadian' clock plays an important role in preferred sleep times, times of peak alertness, and the timing of certain physiological processes. The clock enables maximum expression of genes at appropriate times of the day, allowing organisms to adapt to the earth's rotation. "Chronic desynchronization between physiological and environmental rhythms not only decreases physiological performance but also carries a significant risk of diverse disorders such as diabetes, cardiovascular diseases, sleep disorders, and cancer," says Dr. Makoto Akashi, of Yamaguchi University, in Japan.

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The circadian clock involves two major pathways. The first, which responds to light, has been well characterized. The second, which responds to food, is less understood. Through experiments in cells and mice, Dr. Akashi and his colleagues found, using cell culture, that insulin, a pancreatic hormone that is secreted in response to feeding, may be involved in resetting the circadian clock. "Insulin-mediated phase adjustment of the clock in feeding-relevant tissues may enable the synchronization between mealtime and tissue function, leading to effective digestion and absorption," he says. "In short, insulin may help the stomach clock synchronize with mealtime."

The researchers' findings provide valuable information on how to adjust the circadian clock through dietary manipulation. "For example, for jet lag, dinner should be enriched with ingredients promoting insulin secretion, which might lead to a phase advance of the circadian clock, whereas breakfast would be the opposite," says Dr. Akashi. The findings also suggest that clock adjustments through feeding might not work well in individuals with insulin resistance, a characteristic of patients with type 2 diabetes. Also, there may be side effects related to the circadian clock when treating patients with insulin.



Source: Eurekalert
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