RESEARKA

Additional corpus sources included animal/preclinical evidence; the endpoint scope across the corpus is narrow relative to the clinical breadth of immunosenescence. Most included sources report biomarker-level or transcriptomic outcomes—such as SA-β-gal staining, senescence-associated secretory phenotype (SASP) gene expression, or CD4+ T-cell subset frequencies—rather than hard clinical endpoints (Ioannidis 2005). No study in the curated set reported incident infections, vaccine non-response rates, cancer incidence, or time-to-death as a primary outcome, so the synthesis cannot bridge the gap between observed immunological changes and downstream patient-centered events. Additionally, mechanistic evidence from Aiello 2019 and Park 2026 describes pathways by which senolytic or immunomodulatory agents may attenuate senescent-cell accumulation, yet no corresponding translational trial in this corpus validates those pathways clinically. This mechanism-to-clinic gap means that while biological plausibility is established, the magnitude and durability of any clinical benefit remain unknown.

Citation Support

• source_1 Shimizu 2025
• source_2 Rastgoo 2025
• source_3 Padhiar 2024
• source_4 Park 2026
• source_5 Seah 2026