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The objective of improving health is intimately associated with preventing and delaying age-related diseases. Nutritional and pharmacological approaches aimed at retarding aging are uncovering mechanisms, whose definitive roles in cell and tissue physiology need to be defined. In this article we hypothesize that peroxisome proliferator activated receptor (PPAR)-modulation is a pivotal process that underlies the association between mitochondria and the renin-angiotensin system (RAS) in aging. This hypothesis is based on several lines of evidence suggesting that: a) mitochondrial function and oxidant production are active participants in the aging process; b) PPARs, by regulating mitochondrial function and uncoupling proteins (UCP), seem to play a major role in the age-retarding effects of caloric restriction; c) RAS inhibition delays the deleterious effects of aging and also upregulates PPARs; and d) a number of physiological and molecular events that occur in experimental caloric restriction, and experimental and clinical RAS inhibition, involve changes in mitochondrial functions.

frontiers in bioscience

The interaction between the renin-angiotensin system and peroxisome proliferator activated receptors: a hypothesis including the participation of mitochondria in aging