cDNA expression arrays reveal incomplete reversal of age-related changes in gene expression by calorie restriction

Eun Soo Han, Susan G. Hilsenbeck, Arlan Richardson, James F. Nelson

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Calorie restriction (CR) extends life span and retards many age-related cellular and molecular changes in laboratory rodents. However, neither the breadth of its effects, its underlying mechanisms, nor the limits of its action is fully understood. Expression levels of 588 genes in livers from 3- and 24-month-old ad libitum-fed (AL), and 24-month-old CR (60% of AL intake) male C57BL/6J mice (four per group) were measured. Six genes met the statistical criteria for differential expression in old AL compared to young AL mice. Only one of these age-related changes was attenuated by CR. Four additional gene products, that did not change with age in AL mice, were differentially expressed in old CR compared to old AL mice. Northern and RT-PCR analyses confirmed differential expression of four of the six candidate genes identified by the array results. Many of the identified genes have not previously been reported to be affected by CR or aging. Some of the age-related changes in gene expression are consistent with an increased vulnerability of the aged liver to carcinogenic or other insults, with only partial protection against insult by CR. Incomplete reversal by CR of age-related changes in gene expression provides a potentially important path for probing the limits of CR action. These results also show the importance of independent confirmation in expression array profiling of age-related changes in gene expression. Copyright (C) 2000 Elsevier Science Ireland Ltd.

Original languageEnglish (US)
Pages (from-to)157-174
Number of pages18
JournalMechanisms of Ageing and Development
Volume115
Issue number3
DOIs
StatePublished - Jun 20 2000

Keywords

  • Aging
  • Calorie restriction
  • Gene expression

ASJC Scopus subject areas

  • Aging
  • Developmental Biology

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