Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Gene record

GRB2

growth factor receptor bound protein 2

translation score 0.52, read 2026-10-22; 1 sealed predictions, 0 held; 2 receipts.

Six readers

readerfoundscore
genetics
Open Targets
no genetic evidence; overall 0.03 from other evidence0.00
cell type
Human Protein Atlas
expressed broadly, no clear home in brain cells0.40
chemistry
Open Targets
a small-molecule pocket: prexigebersen0.60
trials
ClinicalTrials.gov
no Parkinson's trials on record: an open field1.00
literature
PubMed
5 Parkinson's papers of 3,6780.76
pathways
Reactome
97 pathways; mostly vesicle traffic1.00

No case: the score is under the bar. Receipt 6703

Sealed predictions

  1. GRB2 in dopamine neurons, braak-0.16 (p 0.682) → +0.40 (p 0.284)receipt 6711

Swarm cases

receipt 6711: GRB2 in dopamine neurons, braak

power
full sample -0.01 (p 0.962, n 18), 95% CI -0.48 to +0.46. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: +0.00 (p 0.990, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: +0.02 (p 0.928, n 18). could be the mix.
skeptic
leave-one-out range -0.16 to +0.13, sign flips 6; without severely affected donors -0.01 (p 0.962, n 18). fragile.
cell type
strongest in OPCs: +0.60 (p 0.0086, n 18) vs -0.01 in dopamine neurons. proposing OPCs.
axis
no measure beats "tracks Braak Lewy-body stage" for GRB2 in dopamine neurons.

follow-up registered; not confirmed in substantia nigra, an independent cohort.
follow-up GRB2 · OPCs · braak: substantia nigra, an independent cohort (Parkinson's or LBD vs controls) -0.70 p 0.013 (needs p < 3.1e-4)

Receipts

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