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Updated: Aug 8, 2026
Techniques to Induce and Quantify Cellular Senescence
Published on: May 1, 2017
Meta-analysis of senescent cell secretomes to identify common and specific features of the different senescent
Yo Oguma1, Nicola Alessio2, Domenico Aprile2
1Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai, Japan.
Abstract:
DNA damage resulting from genotoxic injury can initiate cellular senescence, a state characterized by alterations in cellular metabolism, lysosomal activity, and the secretion of factors collectively known as the senescence-associated secretory phenotype (SASP). Senescence can have beneficial effects on our bodies, such as anti-cancer properties, wound healing, and tissue development, which are attributed to the SASP produced by senescent cells in their intermediate stages. However, senescence can also promote cancer and aging, primarily due to the pro-inflammatory activity of SASP.Studying senescence is complex due to various factors involved. Genotoxic stimuli cause random damage to cellular macromolecules, leading to variations in the senescent phenotype from cell to cell, despite a shared program. Furthermore, senescence is a dynamic process that cannot be analyzed as a static endpoint, adding further complexity.Investigating SASP is particularly intriguing as it reveals how a senescence process triggered in a few cells can spread to many others, resulting in either positive or negative consequences for health. In our study, we conducted a meta-analysis of the protein content of SASP obtained from different research groups, including our own. We categorized the collected omic data based on: i) cell type, ii) harmful agent, and iii) senescence stage (early and late senescence).By employing Gene Ontology and Network analysis on the omic data, we identified common and specific features of different senescent phenotypes. This research has the potential to pave the way for the development of new senotherapeutic drugs aimed at combating the negative consequences associated with the senescence process. Video Abstract.
Insights
Cellular senescence, triggered by DNA damage, involves a complex secretory phenotype (SASP) with both beneficial and detrimental health effects. Our meta-analysis reveals common and specific SASP features across different conditions, aiding senotherapeutic development.
Area of Science:
- Cellular and Molecular Biology
- Aging Research
- Genomics and Proteomics
Background:
- Genotoxic injury induces cellular senescence, a state marked by metabolic shifts and the senescence-associated secretory phenotype (SASP).
- SASP mediates beneficial roles in development and wound healing but also promotes aging and cancer via inflammation.
- Studying senescence is challenging due to cell-to-cell variability and its dynamic nature.
Discussion:
- Investigating SASP is crucial for understanding how localized senescence impacts broader tissue health.
- A meta-analysis of SASP protein content was performed, categorizing data by cell type, inducing agent, and senescence stage.
- Gene Ontology and Network analyses identified conserved and distinct SASP features.
Key Insights:
- Common and specific molecular signatures characterize SASP across diverse experimental contexts.
- Senescence phenotypes exhibit heterogeneity influenced by cell type and genotoxic insult.
- The study provides a comprehensive overview of SASP composition and its variations.
Outlook:
- This research lays the groundwork for developing targeted senotherapeutic interventions.
- Understanding SASP heterogeneity is key to mitigating senescence-associated pathologies.
- Future studies can leverage these findings to design drugs that modulate SASP for therapeutic benefit.
