Blocking PD-L2 prevents senescent cell accumulation and age-related dysfunction.

Blocking PD-L2 reduces senescent cell accumulation by 50% in aged mice, improving insulin sensitivity and physical strength, highlighting a new target for age-related dysfunction.

• Why it matters: Senescent cells build up with age and drive disorders like metabolic issues and frailty, but their immune evasion mechanisms are not fully understood, limiting therapeutic options.
• What they did: The study examined PD-L2 expression in human senescent cells and aged mice, using genetic knockout and antibody treatments to assess effects on senescent cell burden and functional health.
• The result: Inhibiting PD-L2 decreased senescent cell levels and enhanced metabolic and physical functions in aged mice, suggesting that targeting PD-L2 can mitigate age-related decline.