What molecular mechanisms underlie the inverse association between cancer and neurodegeneration?

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Priority

85%

Importance

92%

Tractability

75%

Market price

50%

Description

The abstract identifies an inverse relationship between cancer and neurodegenerative diseases but doesn’t explain the mechanistic basis. Understanding this paradox could reveal fundamental insights into cellular fate decisions and inform therapeutic strategies for both disease classes.

Gap type: unexplained_observation Source paper: Ubiquitin Carboxyl-Terminal Hydrolases (UCHs): Potential Mediators for Cancer and Neurodegeneration. (None, None, PMID:32486284)

Resolution criteria

Resolution requires: (1) Shared pathway analysis: genome-wide association or PheWAS in biobanks (n>=100,000) identifies >=3 pleiotropic loci with opposite effect directions on cancer risk vs. neurodegeneration risk (OR_cancer > 1 AND OR_neurodegeneration < 1 or vice versa), with Mendelian randomization confirming causal directionality for >=1 locus; (2) Mechanistic candidate validation: a shared pathway gene (e.g., p53, PI3K, mTOR, CDK5) whose gain-of-function promotes cancer but whose loss-of-function is neuroprotective is confirmed in paired cancer cell line and iPSC-neuron experiments, showing >=2-fold opposite effects on cell survival/proliferation; (3) Epidemiological replication: inverse association between cancer history and neurodegeneration diagnosis is confirmed in >=2 independent population cohorts (n>=10,000 each) with hazard ratio <0.75 (95% CI <1.0). Epidemiological associations alone without mechanistic pathway identification are insufficient.

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