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Related Concept Videos

Aging01:26

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
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Related Experiment Video

Updated: Jul 10, 2026

Techniques to Induce and Quantify Cellular Senescence
06:51

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

HSF1 in aging: The output selection model.

Saba Khatatneh1, Csaba Sőti1, Milán Somogyvári1

  • 1Department of Molecular Biology, Semmelweis University, Budapest, Hungary.

Mechanisms of Ageing and Development
|July 8, 2026
PubMed
Summary

Heat shock transcription factor HSF1 maintains proteome integrity. Aging reduces its stress response, but basal functions persist, with selective activation strategies proposed for health and disease.

Keywords:
AgingHSF1Heat-shockProteostasisStress responses

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Area of Science:

  • Molecular Biology
  • Cellular Biology
  • Aging Research

Background:

  • Heat shock transcription factor HSF1 is crucial for maintaining proteome integrity by inducing heat shock proteins.
  • HSF1 function and regulation are conserved across multiple organisms.
  • Aging is associated with reduced inducibility of the heat shock response.

Purpose of the Study:

  • To provide a comprehensive overview of HSF1 structure, function, and regulation.
  • To summarize aging-associated changes in HSF1 function and propose a model for age-related activity decline.
  • To review basal, non-canonical HSF1 functions and propose a mechanistic framework for their programmed remodeling.

Main Methods:

  • Comprehensive literature review.
  • Analysis of HSF1 function in multiple organisms, with a focus on C. elegans.
  • Integration of transcriptomic, chromatin, and post-translational data.

Main Results:

  • Aging leads to stochastic decline in HSF1 activity and reduced heat shock response.
  • HSF1 regulates distinct basal transcriptional outputs supporting development, reproduction, and anabolic processes.
  • A novel framework explains differential HSF1 output regulation coupled to life history.

Conclusions:

  • Selective restoration of protective HSF1 outputs is a promising therapeutic strategy.
  • Understanding HSF1's dual role in stress response and basal functions is key for treating proteotoxic diseases and cancer.
  • The HSF1 output selection model reconciles diminished stress inducibility with sustained basal activity.