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Updated: May 29, 2026
Deacetylation Assays to Unravel the Interplay between Sirtuins (SIRT2) and Specific Protein-substrates
Published on: February 27, 2016
The dual role of sirtuins in cancer
Laia Bosch-Presegué1, Alejandro Vaquero
1Chromatin Biology Laboratory, Cancer Epigenetics and Biology Program (PEBC), Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Barcelona, Spain.
Abstract:
Among the greatest challenges facing organisms is that of detecting and effectively responding to life-threatening environmental changes that are intimately associated with metabolic fluctuations and certain forms of stress. These conditions have been linked to the onset of many human pathologies, including cancer. Over the past decade, members of the Sir2 family, or sirtuins, have been described as major players in sensing and coordinating stress response. Evidence has imputed mammalian sirtuins in carcinogenesis, although the mechanisms involved seem to be more diverse and complex than previously anticipated. Some sirtuins, such as SirT2 and SirT6, seem to work as tumor suppressors, but others, such as SirT1, are apparently bifunctional: operating as both tumor suppressors and oncogenic factors depending on the context and the study conditions. The mechanisms underlying these apparently contradictory activities are not well understood, although recent findings suggest that they might actually be two sides of the same coin. In this review, the authors summarize current knowledge on the functional implications of sirtuins in cancer and discuss possible explanations for their functional duality.
Insights
Sirtuins (Sir2 family) are crucial for stress response and linked to cancer. Their roles in carcinogenesis are complex, with some acting as tumor suppressors and others having dual functions depending on context.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- Organisms face challenges responding to environmental changes and metabolic stress, linked to human pathologies like cancer.
- Sirtuins (Sir2 family) are key regulators of stress response.
- Mammalian sirtuins are implicated in carcinogenesis, with complex and diverse mechanisms.
Purpose of the Study:
- To review current knowledge on sirtuin functions in cancer.
- To discuss the dual roles of sirtuins in cancer development and progression.
- To explore potential explanations for the context-dependent activities of sirtuins.
Main Methods:
- Literature review of studies on sirtuins and cancer.
- Analysis of evidence implicating sirtuins in carcinogenesis.
- Synthesis of findings on the tumor-suppressive and oncogenic activities of sirtuins.
Main Results:
- Some sirtuins (e.g., SirT2, SirT6) function as tumor suppressors.
- Other sirtuins (e.g., SirT1) exhibit bifunctional roles, acting as both tumor suppressors and oncogenic factors.
- The dual activities of sirtuins may represent different facets of the same underlying mechanisms.
Conclusions:
- Sirtuins play significant, albeit complex, roles in cancer.
- Understanding the functional duality of sirtuins is crucial for cancer research.
- Further investigation is needed to elucidate the precise mechanisms behind sirtuin's context-dependent roles in cancer.
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