Project description:We performed a factorial experiment examining the effects of calorie restriction (CR) and exercise (EX) in mice. CR mice received 70% of calories but 100% of all other nutrients compared to AL mice. Food consumption, weight gain, and physical activity levels were recorded for 6 weeks. Diet and exercise treatments, both alone and in combination, had significant effects on body composition and levels of physical activity. Affymetrix oligo microarrays were used to determine global gene expression patterns in mammary gland total RNA. CR and EX had some overlapping but primarily unique effects on mammary gene expression, with CR affecting a much larger number of genes. The gene changes presented suggest that CR and EX influence mammary gland development and potentially carcinogenesis through distinct pathways. Keywords: 2 X 2 factorial mouse experiment; ad lib; calorie restriction; exercise; exercise + calorie restriction. Endpoints: body composition; bone density; gene expression in mammary gland
Project description:Calorie restriction (CR) extends lifespan by modulating the mechanisms involved in aging. We quantified the hepatic proteome of male C57BL/6 mice exposed to graded levels of CR (0% to 40% CR) for three months, and evaluated which signaling pathways were most affected.
Project description:Caloric restriction is a robust intervention to increase life span. Giving less food (CR), or allowing free access to diluted diet with indigestible components (CD) are two methods to impose restriction. CD does not generate the same lifespan effect as CR. We compared responses of C57BL/6 mice to equivalent levels of CR and CD. Our study calorie restriction and calorie two restriction methods different effect on hypothamic gene expression pattern, RNA-seq was performed using hypothalamus of mice with 2 methods treatment as well as control group.
