Project description:The effect of a short-term calorie restricted diet was evaluated in heart in seven strains of mice The dietary intervention was initiated at 8 weeks of age and continued until 22 weeks of age
Project description:The effect of a short-term calorie restricted diet was evaluated in six strains of mice The dietary intervention was initiated at 8 weeks of age and continued until 22 weeks of age
Project description:The effect of a short-term calorie restricted diet was evaluated in six strains of mice The dietary intervention was initiated at 8 weeks of age and continued until 22 weeks of age Tissues were collected from mice at 22 weeks of age; there were 96 microarrays used in total: for each of the 6 strains of mice, there were 8 control-fed mice and 8 calorie restricted mice (one individual mouse per microarray)
Project description:The effect of a short-term calorie restricted diet was evaluated in gastrocnemius muscle (GASTROC) in seven strains of mice The dietary intervention was initiated at 8 weeks of age and continued until 22 weeks of age
Project description:The effect of a short-term calorie restricted diet was evaluated in cerebral cortex in seven strains of mice The dietary intervention was initiated at 8 weeks of age and continued until 22 weeks of age
Project description:The effect of a short-term calorie restricted diet was evaluated in epididymal white adipose tissue (WAT) in seven strains of mice The dietary intervention was initiated at 8 weeks of age and continued until 22 weeks of age
Project description:Calorie restriction (CR) extends life span and ameliorates age-related pathologies in most species studied, yet the mechanisms underlying these effects remain unclear. Using mouse skeletal muscle as a model, we show that CR acts in part by enhancing the function of tissue-specific stem cells. Even short-term CR significantly enhanced stem cell availability and activity in the muscle of young and old animals, in concert with an increase in mitochondrial abundance and induction of conserved metabolic and longevity regulators. Moreover, CR enhanced endogenous muscle repair and CR initiated in either donor or recipient animals improved the contribution of donor cells to regenerating muscle after transplant. These studies indicate that metabolic factors play a critical role in regulating stem cell function and that this regulation can influence the efficacy of recovery from injury and the engraftment of transplanted cells.
Project description:Animals have to adjust their activities when faced with caloric restriction (CR) to deal with reduced energy intake. If CR is pronounced, allostasis can push individuals into alternate physiological states which can result in important health benefits across a wide range of taxa. Here we developed a new approach to determine the changes in behavioural phenotype associated with different levels of CR. We exposed C57BL/6 male mice to graded CR (from 0 to 40%) for three months and defined their behavioural phenotype using hidden Markov models of their movement and body temperature. All 40% CR mice exhibited a state-shift in behavioural phenotype and only some exposed to 30% CR did. We show for the first time that mice changed their activity characteristics rather than changed their activities. This new phenotyping approach provides an avenue to determine the mechanisms linking CR to healthspan.