Title : Fasting And Stem Cell Function
link : Fasting And Stem Cell Function
Fasting And Stem Cell Function
In mice, a 24 hour fast improves the function of intestinal stem cells through effects on fatty acid oxidation (FAO). Genetic knockout experiments emphasize the importance of FAO in the fasting effects and suggest possibilities for boosting intestinal stem cell regeneration. Abstract:
Diet has a profound effect on tissue regeneration in diverse organisms, and low caloric states such as intermittent fasting have beneficial effects on organismal health and age-associated loss of tissue function. The role of adult stem and progenitor cells in responding to short-term fasting and whether such responses improve regeneration are not well studied. Here we show that a 24 hr fast augments intestinal stem cell (ISC) function in young and aged mice by inducing a fatty acid oxidation (FAO) program and that pharmacological activation of this program mimics many effects of fasting. Acute genetic disruption of Cpt1a, the rate-limiting enzyme in FAO, abrogates ISC-enhancing effects of fasting, but long-term Cpt1a deletion decreases ISC numbers and function, implicating a role for FAO in ISC maintenance. These findings highlight a role for FAO in mediating pro-regenerative effects of fasting in intestinal biology, and they may represent a viable strategy for enhancing intestinal regeneration.
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