Immune Clearance of Senescent Cells to Combat Ageing and Chronic Diseases
Ping Song1, Junqing An1, Ming-Hui Zou1
1Center for Molecular and Translational Medicine, Georgia State University, 157 Decatur Street SE, Atlanta, GA 30303, USA.
Abstract:
Senescent cells are generally characterized by permanent cell cycle arrest, metabolic alteration and activation, and apoptotic resistance in multiple organs due to various stressors. Excessive accumulation of senescent cells in numerous tissues leads to multiple chronic diseases, tissue dysfunction, age-related diseases and organ ageing. Immune cells can remove senescent cells. Immunaging or impaired innate and adaptive immune responses by senescent cells result in persistent accumulation of various senescent cells. Although senolytics-drugs that selectively remove senescent cells by inducing their apoptosis-are recent hot topics and are making significant research progress, senescence immunotherapies using immune cell-mediated clearance of senescent cells are emerging and promising strategies to fight ageing and multiple chronic diseases. This short review provides an overview of the research progress to date concerning senescent cell-caused chronic diseases and tissue ageing, as well as the regulation of senescence by small-molecule drugs in clinical trials and different roles and regulation of immune cells in the elimination of senescent cells. Mounting evidence indicates that immunotherapy targeting senescent cells combats ageing and chronic diseases and subsequently extends the healthy lifespan.
Insights
Senescent cells accumulate with age, causing chronic diseases. Immunotherapies that use immune cells to clear these cells show promise for treating age-related diseases and extending healthspan.
Area of Science:
- Cellular senescence
- Immunology
- Gerontology
Background:
- Senescent cells, characterized by cell cycle arrest and resistance to apoptosis, accumulate in tissues due to stressors.
- Excessive senescent cell accumulation contributes to chronic diseases, tissue dysfunction, and organ aging.
- Immune cells normally clear senescent cells, but impaired immune responses (immunaging) lead to persistent senescence.
Purpose of the Study:
- To review research on senescent cells and their role in chronic diseases and aging.
- To explore the regulation of senescence by small-molecule drugs.
- To discuss the role of immune cells in eliminating senescent cells and the potential of senescence immunotherapies.
Main Methods:
- Literature review of current research on cellular senescence.
- Analysis of senolytics and senescence immunotherapies.
- Examination of immune cell roles in senescent cell clearance.
Main Results:
- Senescent cells drive chronic diseases and tissue aging.
- Senolytics are emerging drugs for removing senescent cells.
- Senescence immunotherapies utilizing immune cell-mediated clearance are promising strategies.
Conclusions:
- Targeting senescent cells via immunotherapy can combat aging and chronic diseases.
- Enhancing immune cell-mediated clearance of senescent cells may extend healthy lifespan.
- Senescence immunotherapy represents a novel therapeutic avenue for age-related conditions.
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