Rd. Lipman et al., Effects of genotype and diet on age-related lesions in ad libitum fed and calorie-restricted F344, BN, and BNF3F1 rats, J GERONT A, 54(11), 1999, pp. B478-B491
Citations number
26
Categorie Soggetti
Public Health & Health Care Science","Medical Research General Topics
Journal title
JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES
The effects of calorie restriction (CR) on age-related lesions in Brown Nor
way, Fischer 344, and BNF3F1 hybrid rats are presented. A logistic regressi
on analysis of data from histologic samples from rats of each genotype, sex
, and diet at 12, 18, 24, 30, and 36 months of age demonstrated the effects
of age, diet, and sex on lesion prevalence in all three genotypes. CR redu
ced the prevalence of neoplastic, nonneoplastic proliferative and degenerat
ive lesions. All genotype-sex-age cohorts demonstrated a reduced average le
sion burden with CR. Importantly some lesions common to Brown Norway rats s
eldom occurred in Fischer 344 rats and vice versa. Some lesions that occurr
ed in only one parental strain also occurred in BNF3F1 rats. Many traits oc
curred in all three genotypes but at significantly different prevalence rat
es. We suggest that the diseases and lesions that rats develop as they age
are controlled by genes and environmental factors such as CR.