Long-live euthymic BALB/c-nu mice. I. Survival study suggests body weight as a life span predictor

L. Piantanelli, A. Zaia, G. Rossolini, A. Piantanelli, A. Basso, V. N. Anisimov

Research output: Contribution to journalArticlepeer-review


This paper is the first of a series aimed to show the main physiological and pathological characteristics of male euthymic BALB/c-nu mice, a long-live strain of BALB/c mice bred in our own Institute. In particular, the first two paired papers are respectively devoted to general survival information and disease characteristics, also taking into account very old animals that are of high interest for studies on successful aging. In this paper we report the analysis of survival kinetics, the time course of body weight and the correlation between body weight and time-at-death. The longitudinal study has been performed on 88 male mice, checking individually their body weight and date of death and analyzing survival data by a model built by our own. Survival analysis shows quite higher longevity (median age: about 29 months) in this population when compared with other BALB/c strains. The most relevant finding on body weight is its correlation with longevity until the age of 22 months: thinner subjects live longer and lose weight at a lower rate than their heavier mates. Results have formed the basis on which to plan the cross-sectional experiment to study pathologies and biological parameters at different ages, including a group of mice at very advanced ages (34 months).

Original languageEnglish
Pages (from-to)463-475
Number of pages13
JournalMechanisms of Ageing and Development
Issue number5
Publication statusPublished - Apr 30 2001


  • Body weight
  • Euthymic BALB/c-nu mice
  • Long-live animals
  • Longevity prediction
  • Mathematical models
  • Survivorship

ASJC Scopus subject areas

  • Ageing
  • Biochemistry
  • Developmental Biology
  • Developmental Neuroscience


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