Senescent cells accumulate in aging kidneys alongside localized immune cell infiltration, with macrophages clustering preferentially around senescent tubular cells. Senolytic treatment reduces senescent cell burden and overall immune infiltration, though macrophages persist near residual senescent structures, suggesting incomplete resolution of senescence-associated inflammatory niches.
Key Points
- Senescent kidney cells create localized inflammatory microenvironments attracting immune cells
- Macrophages remain enriched around residual senescent cells after senolytic treatment
- p16 Ink4a burden correlates more closely with senescence than chronological age
Longevity Analysis
The spatial organization of senescent cells and their associated immune responses represents a measurable target in renal aging. Rather than treating senescence and inflammation as systemic phenomena, this work reveals localized microenvironments where failed cellular repair intersects with persistent macrophage activity. Incomplete clearance of senescent cells after senolytic intervention indicates that therapeutic efficacy depends not only on reducing senescent cell burden but on disrupting the inflammatory niches that sustain them. This distinction matters: identifying and addressing what sustains these microenvironments—whether through refined senolytic strategies, immune modulation, or removal of factors that prevent repair—becomes necessary for meaningful slowing of kidney aging.
Original published by Wiley Aging Cell, by Martin Jaros, Marco Schmidt, Lavinia Neubert, Jan‐Christopher Kamp, Sibylle von Vietinghoff, Jan Hinrich Bräsen, Roland Schmitt, Anette Melk .