{"ranked_hypotheses": [{"title": "Radiation drives pericyte senescence through lysosome acidification failure and stalled late-stage autophagy", "description": "Autophagosomes still form after irradiation, but damaged lysosomes cannot clear cargo, sustaining ROS and SASP output.", "target_gene": "TFEB", "dimension_scores": {"evidence_strength": 0.61, "novelty": 0.6, "feasibility": 0.77, "therapeutic_potential": 0.65, "mechanistic_plausibility": 0.76, "druggability": 0.58, "safety_profile": 0.56, "competitive_landscape": 0.61, "data_availability": 0.72, "reproducibility": 0.66}, "composite_score": 0.652, "evidence_for": [{"claim": "Flux and lysosomal pH assays can sharply test a late-stage autophagy block.", "pmid": ""}], "evidence_against": [{"claim": "Static LC3/SQSTM1 accumulation can be misread without direct flux data.", "pmid": ""}]}, {"title": "Mitophagy collapse via PINK1-PRKN is the primary autophagy lesion after irradiation", "description": "Persistent damaged mitochondria sustain senescence and inflammatory signaling because selective mitochondrial clearance fails.", "target_gene": "PINK1", "dimension_scores": {"evidence_strength": 0.56, "novelty": 0.63, "feasibility": 0.71, "therapeutic_potential": 0.67, "mechanistic_plausibility": 0.69, "druggability": 0.55, "safety_profile": 0.55, "competitive_landscape": 0.58, "data_availability": 0.61, "reproducibility": 0.59}, "composite_score": 0.614, "evidence_for": [{"claim": "Radiation-sensitive mitochondrial damage provides a biologically coherent entry point.", "pmid": ""}], "evidence_against": [{"claim": "Mitophagy failure may be secondary to broader lysosomal dysfunction.", "pmid": ""}]}, {"title": "Chronic mTORC1-ULK1 signaling blocks autophagy initiation in irradiated pericytes", "description": "DNA damage and SASP signaling keep initiation suppressed, producing a durable upstream autophagy defect.", "target_gene": "MTOR", "dimension_scores": {"evidence_strength": 0.49, "novelty": 0.49, "feasibility": 0.74, "therapeutic_potential": 0.58, "mechanistic_plausibility": 0.58, "druggability": 0.69, "safety_profile": 0.47, "competitive_landscape": 0.53, "data_availability": 0.66, "reproducibility": 0.55}, "composite_score": 0.578, "evidence_for": [{"claim": "The pathway is experimentally accessible with strong pharmacology.", "pmid": ""}], "evidence_against": [{"claim": "mTOR activation may be transient and not the durable causal lesion.", "pmid": ""}]}], "knowledge_edges": [{"source_id": "TFEB", "source_type": "gene", "target_id": "lysosomal_clearance", "target_type": "process", "relation": "regulates"}, {"source_id": "PINK1", "source_type": "gene", "target_id": "pericyte_senescence", "target_type": "phenotype", "relation": "modulates"}], "synthesis_summary": "The debate centered on where autophagy fails: initiation, selective mitophagy, or late lysosomal clearance. Late-stage lysosome dysfunction ranked first because it can unify persistent ROS, cargo accumulation, and senescence maintenance without requiring an initial failure to form autophagosomes.\n\nThe critical next step is a time-resolved flux map rather than endpoint marker collection. That map should determine whether mitochondrial QC defects precede lysosome collapse or arise downstream of it, because the therapeutic program depends on that ordering."}