December 19, 2013
Science Daily/University of California - Irvine
A high-fat diet affects the molecular mechanism controlling the internal body clock that regulates metabolic functions in the liver, UC Irvine scientists have found. Disruption of these circadian rhythms may contribute to metabolic distress ailments, such as diabetes, obesity and high blood pressure.
The researchers also discovered that returning to a balanced, low-fat diet normalized the rhythms. This study reveals that the circadian clock is able to reprogram itself depending on a diet's nutritional content -- which could lead to the identification of novel pharmacological targets for controlled diets.
A high-fat diet reprograms the liver clock through two main mechanisms. One blocks normal cycles by impeding the clock regulator genes called CLOCK:BMAL1. The other initiates a new program of oscillations by activating genes that normally do not oscillate, principally through a factor called PPAR-gamma. Previously implicated in inflammatory responses and the formation of fatty tissue, this factor oscillates with a high-fat diet.
Science Daily/SOURCE :http://www.sciencedaily.com/releases/2013/12/131219134453.htm