Proteostasis and longevity: when does aging really begin?
Open accessAbstract
Aging is a complex process regulated by multiple cellular pathways, including the proteostasis network.The proteostasis network consists of molecular chaperones, stress-response transcription factors, and protein degradation machines that sense and respond to proteotoxic stress and protein misfolding to ensure cell viability.A loss of proteostasis is associated with aging and age-related disorders in diverse model systems, moreover, genetic or pharmacological enhancement of the proteostasis network has been shown to extend lifespan and suppress age-related disease.However, our understanding of the relationship between aging, proteostasis, and the proteostasis network remains unclear.Here, we propose, from studies in Caenorhabditis elegans, that proteostasis collapse is not gradual but rather a sudden and early life event that triggers proteome mismanagement, thereby affecting a multitude of downstream processes.Furthermore, we propose that this phenomenon is not stochastic but is instead a programmed re-modeling of the proteostasis network that may be conserved in other species.As such, we postulate that changes in the proteostasis network may be one of the earliest events dictating healthy aging in metazoans. Aging, proteome integrity, and the proteostasis networkAging is inextricably linked to the world around us and regularly pervades everyday life.Despite this, why organisms age remains a complex mystery that if understood could have profound implications for the quality of human health.While the physiological decline associated with old age is easily recognizable, the mechanisms that determine aging are poorly understood; however, widescale loss of protein homeostasis (proteostasis) is proposed to be one of the "primary hallmarks of aging" [1].
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In invertebrates and mammals, HSF1 activates protein-folding chaperone expression in response to elevated unfolded proteins.
“In invertebrates and mammals, the transcription factor HSF1 activates expression of protein-folding chaperones in response to elevated levels of unfolded proteins (Labbadia and Morimoto, 2014; Mahat et al., 2016).”
From The Aging Epigenome (2016) · cites this paper as Labbadia and Morimoto, 2014
Proteostasis and the HSF-1 response decline with age.
“Proteostasis and the HSF-1 response decline with age (Labbadia and Morimoto, 2014).”
From The Aging Epigenome (2016) · cites this paper as Labbadia and Morimoto, 2014
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- Authors
- Labbadia, J., & Morimoto, R. I.
- Affiliations
- Northwestern University (US)
- Corresponding author
- Morimoto, Richard I.
- Venue
- F1000Prime Reports
- Publisher
- H1 Connect
- Published
- 2014-02-03
- Volume
- 6
- ISSN
- 2051-7599 (ISSN-L)
- OpenAlex
- W4252872000
- Cited by
- 100
- References
- 49
- Citations by year
- 2026: 4 · 2025: 3 · 2024: 6 · 2023: 6 · 2022: 8 · 2021: 3 · 2020: 5 · 2019: 8 · 2018: 10 · 2017: 6 · 2016: 17 · 2015: 10 · 2014: 13
- FWCI
- 5.24
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- F1000Prime Reports (publishedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
- Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
- Keywords
- proteostasis, aging, proteostasis network, molecular chaperones, protein degradation, proteotoxic stress, protein misfolding, lifespan extension, age-related diseases, Caenorhabditis elegans
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