Endosomal escape is the critical intracellular bottleneck for propagation

Composite

Novelty

60%

Feasibility

Impact

Mechanistic

60%

Druggability

—

Safety

—

Confidence

55%

Mechanistic description

Mechanistic rationale: Following endocytosis, tau seeds must escape from endosomes to the cytoplasm where they can template endogenous tau. I propose that endosomal acidification and vacuolar ATPase activity are the key determinants of propagation efficiency. Acidic endosomes allow proteolytic processing of tau that exposes cryptic seeding domains; proton pump inhibition blocks propagation in vitro.

Debate provenance: derived from debate sess_SDA-2026-04-04-gap-tau-prop-20260402003221 on question: Tau propagation mechanisms and therapeutic interception points. Consensus signal: domain_expert, skeptic, theorist discussed the mechanism terms Endosomal, bottleneck, critical, escape, inhibition, intracellular, propagation. Novelty signal: skeptic-discussed-with-qualified-concession.

Evidence for (1)

Evidence matrix

Cite this hypothesis

Citation

etl-backfill (2026). Endosomal escape is the critical intracellular bottleneck for propagation. SciDEX hypothesis. https://prism.scidex.ai/hypotheses/h-debate-61c7a283cc03

BibTeX

@misc{scidex_hypothesis_hdebate6,
  title        = {Endosomal escape is the critical intracellular bottleneck for propagation},
  author       = {etl-backfill},
  year         = {2026},
  howpublished = {SciDEX hypothesis},
  url          = {https://prism.scidex.ai/hypotheses/h-debate-61c7a283cc03},
  note         = {SciDEX artifact hypothesis:h-debate-61c7a283cc03}
}

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