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Narrative review discusses dual role of senescent cells in cancer immunity and emerging therapeutic strategies.

Narrative review discusses dual role of senescent cells in cancer immunity and emerging therapeutic …
Photo by National Institute of Allergy and Infectious Diseases / Unsplash
Key Takeaway
Consider emerging senescence-targeted immunotherapies as a conceptual approach to harness senescence for cancer control.

This narrative review addresses the dual role of senescent cells within the context of tumor immunity and cancer control. The scope encompasses the mechanisms by which senescent cells influence the tumor microenvironment, including their potential to enhance immune surveillance through SASP-mediated effects and their inherent immunogenicity. Conversely, the authors discuss how these cells may promote tumorigenesis by fostering an immunosuppressive microenvironment and upregulating immune checkpoints to facilitate escape.

The review further explores systemic senescence induction, noting that such approaches can lead to off-target effects in healthy tissues. While the specific study populations and sample sizes are not reported, the qualitative synthesis suggests that selectively eliminating senescent populations remains a theoretical strategy. The authors acknowledge that the current understanding is based on mechanistic insights rather than pooled quantitative data from clinical trials.

Limitations of the evidence are inherent to the narrative format, which precludes the calculation of effect sizes or confidence intervals. Consequently, the practice relevance is framed as an emerging approach rather than an established standard. Clinicians should interpret these findings as a conceptual framework for next-generation immunotherapies rather than definitive clinical guidance, given the lack of reported adverse event rates or specific tolerability data.

Study Details

Study typeSystematic review
EvidenceLevel 1
PublishedApr 2026
View Original Abstract ↓
Cellular senescence represents a state of stable, often irreversible cell cycle arrest. Unlike apoptosis, senescent cells (SCs) remain metabolically active and engage in robust secretory activity, most notably through the senescence-associated secretory phenotype (SASP). The SASP exerts profound and context-dependent effects on tumor initiation and progression. This review analyzes the dual role of senescent cells in tumor immunity. On one hand, they can exhibit anti-tumorigenic effects through SASP-mediated enhancement of immune surveillance and their inherent high immunogenicity. On the other hand, they can promote tumorigenesis by fostering an immunosuppressive microenvironment, polarizing immune cells via the SASP, and upregulating senescence-associated immune checkpoints (SAICs) to facilitate immune escape. These dual characteristics inform promising therapeutic strategies: first, inducing senescence in tumor cells, and second, selectively eliminating the resulting senescent populations. Notably, systemic senescence induction can cause off-target effects in healthy tissues, underscoring the need for targeted delivery systems. In conclusion, we highlight emerging senescence-targeted immunotherapies as a next-generation approach to strategically harness senescence for cancer control.
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