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Science 313 (5789): 971-975

Copyright © 2006 by the American Association for the Advancement of Science

Mutations That Increase the Life Span of C. elegans Inhibit Tumor Growth

Julie M. Pinkston, Delia Garigan, Malene Hansen, Cynthia Kenyon*

Abstract: Mutations in gld-1 cause lethal germline tumors in the nematode Caenorhabditis elegans. We find that a wide variety of mutations that extend C. elegans' life span confer resistance to these tumors. The long life spans of daf-2/insulin-receptor mutants were not shortened at all by gld-1 mutations; we attribute this finding to decreased cell division and increased DAF-16/p53–dependent apoptosis within the tumors. Mutations that increase life span by restricting food intake or inhibiting respiration did not affect apoptosis but reduced tumor cell division. Unexpectedly, none of these longevity mutations affected mitosis in normal germlines; this finding suggests that cellular changes that lead to longevity preferentially antagonize tumor cell growth.

Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94158, USA.

* To whom correspondence should be addressed. E-mail: ckenyon{at}

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