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Titolo:
Increasing Saccharomyces cerevisiae stress resistance, through the overactivation of the heat shock response resulting from defects in the Hsp90 chaperone, does not extend replicative life span but can be associated with slower chronological ageing of nondividing cells
Autore:
Harris, N; MacLean, M; Hatzianthis, K; Panaretou, B; Piper, PW;
Indirizzi:
Univ London Univ Coll, Dept Biochem & Mol Biol, London WC1E 6BT, England Univ London Univ Coll London England WC1E 6BT , London WC1E 6BT, England
Titolo Testata:
MOLECULAR GENETICS AND GENOMICS
fascicolo: 2, volume: 265, anno: 2001,
pagine: 258 - 263
SICI:
1617-4615(200104)265:2<258:ISCSRT>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
CAENORHABDITIS-ELEGANS; C-ELEGANS; MOLECULAR CHAPERONE; PODOSPORA-ANSERINA; OXIDATIVE-STRESS; MOTHER CELLS; YEAST; LONGEVITY; EXPRESSION; PROTEIN;
Keywords:
ageing; stress resistance; replicative senescence; chronological life span; Saccharomyces cerevisiae; Hsp90; yeast;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Piper, PW Univ London Univ Coll, Dept Biochem & Mol Biol, Gower St, LondonWC1E 6BT,England Univ London Univ Coll Gower St London England WC1E 6BT ,England
Citazione:
N. Harris et al., "Increasing Saccharomyces cerevisiae stress resistance, through the overactivation of the heat shock response resulting from defects in the Hsp90 chaperone, does not extend replicative life span but can be associated with slower chronological ageing of nondividing cells", MOL GENET G, 265(2), 2001, pp. 258-263

Abstract

Recent studies on Drosophila and Caenorhabditis elegans indicate that increases in stress resistance result in a longer chronological life span, an effect that must operate primarily on the postmitotic tissues of the adult. Stress resistance can be increased through decreases In Hsp90 chaperone activity, since Hsp90 acts to downregulate the activity of heat shock transcription factor. This study investigated whether the increases in stress resistance associated with reduced Hsp90 chaperone activity influence ageing in the budding yeast Saccharomyces cerevisiae, ageing being measured either asthe replicative (nonchronological) senescence of budding cells or as the chronological ageing of non-dividing (stationary phase) cultures. Overactivation of the heat shock response caused no slowing of replicative senescence. In some situations though it was associated with a longer chronological life span of stationary cells, the yeast equivalent of the postmitotic state. This is consistent With the idea that stress resistance exerts its life span-extending effects primarily in postmitotic cells and tissues.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 00:37:37