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Regulation of Aging and Age-Related Disease by DAF-16 and Heat-Shock Factor
Ao-Lin Hsu,Coleen T. Murphy,Cynthia Kenyon*
The Caenorhabditis elegans transcription factor HSF-1, whichregulates the heat-shock response, also influences aging. Reducinghsf-1 activity accelerates tissue aging and shortens life-span,and we show that hsf-1 overexpression extends lifespan. We findthat HSF-1, like the transcription factor DAF-16, is requiredfor daf-2insulin/IGF-1 receptor mutations to extend life-span.Our findings suggest this is because HSF-1 and DAF-16 togetheractivate expression of specific genes, including genes encodingsmall heat-shock proteins, which in turn promote longevity.The small heat-shock proteins also delay the onset of polyglutamine-expansionprotein aggregation, suggesting that these proteins couple thenormal aging process to this type of age-related disease.
Department of Biochemistry and Biophysics, University of California, San Francisco, CA 941432200, USA.
* To whom correspondence should be addressed. E-mail: ckenyon{at}biochem.ucsf.edu
FOXO3a Is Broadly Neuroprotective In Vitro and In Vivo against Insults Implicated in Motor Neuron Diseases.
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PNAS
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Genetics
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From the Cover: Age-related changes of nuclear architecture in Caenorhabditis elegans.
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PNAS
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Pharmacological induction of heat-shock proteins alleviates polyglutamine-mediated motor neuron disease.
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PNAS
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Mechanism of Chaperone Function in Small Heat Shock Proteins: DISSOCIATION OF THE HSP27 OLIGOMER IS REQUIRED FOR RECOGNITION AND BINDING OF DESTABILIZED T4 LYSOZYME.
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The L-Type Cyclin CYL-1 and the Heat-Shock-Factor HSF-1 Are Required for Heat-Shock-Induced Protein Expression in Caenorhabditis elegans.
Y. M. Hajdu-Cronin, W. J. Chen, and P. W. Sternberg (2004)
Genetics
168, 1937-1949
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Shared Transcriptional Signature in Caenorhabditis elegans Dauer Larvae and Long-lived daf-2 Mutants Implicates Detoxification System in Longevity Assurance.
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What Can Progeroid Syndromes Tell Us About Human Aging?.
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Science
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PNAS
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PNAS
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From The Cover: Genome-wide RNA interference screen identifies previously undescribed regulators of polyglutamine aggregation.
E. A. A. Nollen, S. M. Garcia, G. van Haaften, S. Kim, A. Chavez, R. I. Morimoto, and R. H. A. Plasterk (2004)
PNAS
101, 6403-6408
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The Identity of Proteins Associated with a Small Heat Shock Protein during Heat Stress in Vivo Indicates That These Chaperones Protect a Wide Range of Cellular Functions.
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Exceptional Longevity in Pet Dogs Is Accompanied by Cancer Resistance and Delayed Onset of Major Diseases.
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OutFOXing the Grim Reaper: Novel Mechanisms Regulating Longevity by Forkhead Transcription Factors.