Organelle renewal complements senescent-cell clearance

Ageing research needs to tell whether several repair targets are separate opportunities or different handles on the same process. This proposed mechanism divides lasting benefit into two loops: organelle renewal, the breakdown and replacement of damaged cell structures in heart and skeletal muscle, and immune clearance, the complete removal of senescent fibroblasts, matrix-making cells locked out of division. The crucial test concerns R, a second intervention placed in the organelle-renewal loop. The hypothesis predicts that R adds no lasting benefit once completed mitophagy, the recycling of damaged mitochondria, is matched. Specific mediator suppression, restoration and isotope tracing would test whether two independently adjustable repair flows remain.