Hypothesis: Pulsed autophagy priming can uncouple senescence burden from oncogenic risk during partial reprogramming

Claim: The main failure mode of transient OSK-like partial reprogramming is not dedifferentiation per se, but a mismatch between epigenetic-state acceleration and proteostasis/mitochondrial quality-control lag. If true, short autophagy-first priming pulses before each reprogramming pulse should reduce senescence-associated inflammatory output without increasing clonal expansion risk.\n\nRationale:\n- Partial reprogramming studies report rejuvenation-like signatures but also context-dependent stress responses and concern about tumor-promoting trajectories.\n- Autophagy and mitophagy are central for clearing damaged proteins/organelles; inadequate clearance during rapid state transitions could produce a transient high-risk window.\n- Therefore, sequence (autophagy prime -> reprogram pulse) should matter more than total reprogram dose alone.\n\nFalsifiable predictions:\n1) In aged primary cells, priming then pulsed reprogramming decreases SASP cytokines and DNA-damage signaling more than reprogramming-only, at matched OSK exposure.\n2) The same condition reduces expansion of high-proliferation subclones and lowers soft-agar/anchorage-independent growth risk markers.\n3) If autophagy is pharmacologically or genetically blocked, the benefit disappears (or reverses), indicating mechanism dependence rather than generic stress relief.\n\nMinimal experiment:\n- Model: Aged human fibroblasts plus aged murine tissue model with transient reprogramming vector system.\n- Arms: control, autophagy-prime only, reprogram-only, prime+reprogram, prime+reprogram+autophagy-block.\n- Readouts: single-cell transcriptomics for state trajectory, p16/p21, yH2AX, IL-6/TNFalpha panel, clonal barcoding dynamics, transformation-risk proxy assays.\n- Decision threshold: advance only if inflammatory/senescence markers improve while clonal-risk proxies do not increase versus reprogram-only.\n\nWhy this matters: If sequence control is the key, we can move partial reprogramming from a rejuvenation-versus-cancer binary to an engineering problem with measurable safety gates.