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Published on: January 2, 2017
Senotherapy: Implications for Transplantation
Martin Jaros1,2, Anette Melk1,3
1Interdisciplinary Transplantation, Children's Hospital, Hannover Medical School, Hannover, Germany.
Abstract:
Cellular senescence has been identified as a potential driver of age-associated loss of organ function and as a mediator of age-related disease. Novel strategies in targeting senescent cells have shown promise in several organ systems to counteract functional decline, chronic inflammation, and age-dependent loss of repair capacity. Transgenic models have provided proof of principle that senolysis, the elimination of senescent cells, is an attractive strategy to overcome many age-related pathologies. The translation into clinical application is now possible with the emergence of drug-based senotherapies. In this review, we will discuss different senotherapeutic approaches and their modes of action. Senolytics eliminate senescent cells preferentially through the induction of apoptosis in senescent but not in normal cells, whereas senomorphics rather interact with the proinflammatory profile present in senescent cells. In the context of transplantation, the natural clearance of senescent cells might be reduced because of dysfunctional immune surveillance under immunosuppression. The transplantation setting allows for different applications of senotherapies. Conditioning donor organs before and during the ex situ phase offers the opportunity to interfere with accumulating senescence, ultimately reducing the burden of life-limiting comorbidities in chronically ill recipients.
Insights
Cellular senescence drives aging and disease. Senotherapeutic drugs, like senolytics and senomorphics, target these cells to improve organ function and reduce age-related pathologies, showing promise in transplantation.
Area of Science:
- Gerontology and Regenerative Medicine
- Cell Biology and Molecular Medicine
- Transplantation Science
Background:
- Cellular senescence is implicated in age-related organ dysfunction and disease.
- Targeting senescent cells shows potential to counteract aging effects and restore repair capacity.
- Senolysis, the elimination of senescent cells, is a promising strategy for age-related pathologies.
Purpose of the Study:
- To review senotherapeutic approaches and their mechanisms of action.
- To explore the application of senotherapies in organ transplantation.
- To discuss how pre-transplant conditioning can mitigate senescence in donor organs.
Main Methods:
- Discussion of senolytic drugs that induce apoptosis in senescent cells.
- Explanation of senomorphic drugs that modulate the inflammatory profile of senescent cells.
- Analysis of senescent cell clearance in the context of immunosuppression during transplantation.
Main Results:
- Senolytics selectively eliminate senescent cells, while senomorphics modify their inflammatory secretions.
- Reduced natural clearance of senescent cells may occur in transplant recipients due to immunosuppression.
- Pre-conditioning donor organs can reduce senescence accumulation, potentially improving transplant outcomes.
Conclusions:
- Senotherapeutics offer novel strategies to combat age-related diseases by targeting cellular senescence.
- Senotherapies hold significant potential for application in organ transplantation to improve graft function and recipient health.
- Interfering with senescence in donor organs before transplantation may reduce the burden of comorbidities in recipients.
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