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The effect of late onset, short‐term caloric restriction on the core temperature and physical activity in mice
Author(s) -
Golightly Andrew,
Boys Richard J.,
Cameron Kerry M.,
Zglinicki Thomas von
Publication year - 2012
Publication title -
journal of the royal statistical society: series c (applied statistics)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.205
H-Index - 72
eISSN - 1467-9876
pISSN - 0035-9254
DOI - 10.1111/j.1467-9876.2012.01045.x
Subject(s) - caloric theory , core (optical fiber) , animal model , term (time) , bayesian probability , constant (computer programming) , random effects model , endocrinology , medicine , mathematics , statistics , computer science , physics , telecommunications , meta analysis , quantum mechanics , programming language
Summary. Caloric restriction (CR) has been shown to delay the onset of cancer and other diseases that are associated with aging. Currently there are very few studies examining the whole‐animal physiological response to late onset CR. We study the ways by which mice physiologically compensate for reduced availability of food given exposure to late onset CR and compare these with mice fed ad libitum . The data arise from a 70‐day experiment that was undertaken by the authors. A joint model is developed to describe core body temperature and levels of activity and the model parameters assessed for temporal dependence by using dynamic linear models. A Bayesian approach is used throughout. The dynamic parameters are shown to be plausibly constant over time and the constant parameter model is then embedded within a random‐effects structure to explore differences between the responses of CR and ad libitum mice. This model is shown to provide a good description of the data.