Aging Clinical and Experimental Research

, Volume 10, Issue 6, pp 463–470

Effects of caloric restriction or augmentation in adult rats: Longevity and lesion biomarkers of aging

  • R. D. Lipman
  • D. E. Smith
  • J. B. Blumberg
  • R. T. Bronson
Original Article

DOI: 10.1007/BF03340160

Cite this article as:
Lipman, R.D., Smith, D.E., Blumberg, J.B. et al. Aging Clin Exp Res (1998) 10: 463. doi:10.1007/BF03340160

Abstract

Caloric restriction (CR) initiated in young rodents has been thoroughly documented to enhance longevity, but its efficacy when introduced at older ages has not been well investigated. Cohorts of 18- and 26-month-old male F344 × BN F1 hybrid rats were fed either: 1) NIH-31 meal (C); 2) vitamin and mineral fortified NIH-31 meal (R); or 3) vitamin and mineral fortified NIH-31 meal supplemented with corn oil and sweetened condensed milk (S). The C control rats were fed ad libitum, R rats were restricted to 32% of the caloric intake of the controls, and S rats were allowed to consume not more than 8% more calories than C rats. After 6 weeks, the average weights were significantly different between all diet and age groups. Although calorie manipulation altered body weight, no significant effect of the dietary intervention on longevity was found. The average lesion burden, including tumor burden and prevalence of nearly all commonly occurring lesions, were comparable between the groups. Thus, the manipulation of weight at ages beyond middle age has a much less profound impact than similar interventions during growth and maturation in rats.

Key words

Biomarkers of aging calorie augmentation calorie restriction longevity 

Copyright information

© Springer Internal Publishing Switzerland 1998

Authors and Affiliations

  • R. D. Lipman
    • 1
  • D. E. Smith
    • 1
  • J. B. Blumberg
    • 1
  • R. T. Bronson
    • 1
  1. 1.Jean Mayer USDA Human Nutrition Research Center on AgingTufts UniversityBostonUSA

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