What are the optimal delivery mechanisms for antisense oligonucleotides targeting RBP splicing defects across CNS regions?

While splicing correction was identified as mechanistically promising, the debate noted major delivery challenges to neurons. The differential accessibility of brain regions affected in ALS, FTD, and AD remains a critical therapeutic bottleneck.

Source: Debate session sess_sda-2026-04-01-gap-v2-68d9c9c1 (Analysis: sda-2026-04-01-gap-v2-68d9c9c1)

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Supporting evidence includes debate sess_SDA-2026-04-06-gap-pubmed-20260406-041423-3a6aa4ab_task_9aae8fc5.”, “match_counts”: {“hypothesis_matches”: 4, “debate_matches”: 5, “paper_matches”: 0}, “hypothesis_matches”: [{“id”: “h-72c719461c”, “title”: “C9orf72 ASO Treatment Reverses TDP-43 Pathology in ALS/FTD”, “score”: 0.39, “reason”: “6 token overlaps; entity overlap: als, ftd”, “analysis_id”: “test-hypothesis-fixtures-v1”, “target_gene”: “C9orf72”, “target_pathway”: null, “disease”: “neurodegeneration”, “composite_score”: 0.72, “confidence_score”: 0.88, “status”: “proposed”, “pubmed_evidence_ids”: [“21944792”, “28960178”, “29460270”, “39605053”, “40520109”]}, {“id”: “h-var-a0933e666d”, “title”: “Microglial AIM2 Inflammasome as the Primary Driver of TDP-43 Proteinopathy Neuroinflammation in ALS/FTD”, “score”: 0.33, “reason”: “15 token overlaps; entity overlap: als, ftd”, “analysis_id”: “SDA-2026-04-01-gap-20260401-225149”, “target_gene”: “AIM2, CASP1, IL1B, PYCARD, TARDBP”, “target_pathway”: “Microglial AIM2 inflammasome activation via phagocytosed neuron-derived mtDNA in TDP-43 proteinopathy”, “disease”: “neurodegeneration”, “composite_score”: 0.8240000000000001, “confidence_score”: 0.76, “status”: “proposed”, “pubmed_evidence_ids”: [“27519954”, “28506519”, “29263430”, “29643512”, “30610225”]}, {“id”: “897f3e4a-f96a-4a65-b3c8-61e20a1054da”, “title”: “Arginine Methylation Loss on FUS RGG Domains Drives Irreversible Phase Transition to Amyloid in ALS”, “score”: 0.311, “reason”: “3 token overlaps; entity overlap: als, rbp”, “analysis_id”: “52661eaf-79f8-4647-8f48-3389f5af4d59”, “target_gene”: “FUS”, “target_pathway”: “Arginine methylation / RBP phase separation”, “disease”: “ALS”, “composite_score”: 0.679653, “confidence_score”: 0.48, “status”: “open”, “pubmed_evidence_ids”: [“26317470”, “27600654”, “39167487”, “39494508”, “40700505”]}, {“id”: “ec8b839c-6440-45dc-aff6-5edea1fd2d6d”, “title”: “STMN2 Cryptic Exon Inclusion is the Earliest Loss-of-Function Marker of TDP-43 Nuclear Depletion in ALS Motor Neurons”, “score”: 0.237, “reason”: “5 token overlaps; entity overlap: als”, “analysis_id”: “0ed3c364-07fd-4620-8e90-8bd33c14e370”, “target_gene”: “TARDBP”, “target_pathway”: “TDP-43 splicing regulation / axon maintenance”, “disease”: “ALS”, “composite_score”: 0.720856, “confidence_score”: 0.6, “status”: “open”, “pubmed_evidence_ids”: [“30643292”, “34879411”, “34930382”, “36927019”, “38967083”]}], “debate_matches”: [{“id”: “sess_SDA-2026-04-06-gap-pubmed-20260406-041423-3a6aa4ab_task_9aae8fc5”, “title”: “The study shows TRIM21 and autophagy receptors can eliminate both physiological and pathological SGs, yet persistent stress granules are hallmarks of ALS/FTD. The mechanisms by which disease-associated SGs evade this clearance system remain unclear but are critical for therapeutic targeting.\n\nGap type: open_question\nSource paper: Stress granule homeostasis is modulated by TRIM21-mediated ubiquitination of G3BP1 and autophagy-dependent elimination of stress granules. 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