Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Gene record

SMPD1

sphingomyelin phosphodiesterase 1

translation score 0.46, read 2026-10-27; 3 sealed predictions, 0 held; 15 receipts.

Six readers

readerfoundscore
genetics
Open Targets
no genetic evidence; overall 0.55 from other evidence0.00
cell type
Human Protein Atlas
expressed broadly, no clear home in brain cells0.40
chemistry
Open Targets
a small-molecule pocket0.60
trials
ClinicalTrials.gov
no Parkinson's trials on record: an open field1.00
literature
PubMed
42 Parkinson's papers of 3740.51
pathways
Reactome
2 pathways; mostly lysosome and autophagy1.00

No case: the score is under the bar. Receipt 11461

Earlier readings: 2026-10-26 0.46; 2026-10-25 0.46; 2026-10-24 0.46; 2026-10-23 0.46.

Sealed predictions

  1. SMPD1 in dopamine neurons, braak+0.52 (p 0.152) → -0.45 (p 0.227)receipt 0588
  2. SMPD1 in dopamine neurons, braakn/a → n/areceipt 0130
  3. SMPD1 in dopamine neurons, resiliencen/a → n/areceipt 0131

Swarm cases

receipt 0588: SMPD1 in dopamine neurons, braak

power
full sample -0.09 (p 0.735, n 18), 95% CI -0.53 to +0.40. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.11 (p 0.677, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.12 (p 0.640, n 18). could be the mix.
skeptic
leave-one-out range -0.23 to +0.02, sign flips 2; without severely affected donors -0.09 (p 0.735, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for SMPD1 in dopamine neurons.

case closed: nothing better to follow up.

receipt 0131: SMPD1 in dopamine neurons, resilience

cell type
SMPD1 is not measured in dopamine neurons; looking elsewhere.
cell type
no other cell group does better.
axis
no measure beats "differs in resilient donors (Lewy pathology, no parkinsonism)" for SMPD1 in dopamine neurons.

case closed: nothing better to follow up.

receipt 0130: SMPD1 in dopamine neurons, braak

cell type
SMPD1 is not measured in dopamine neurons; looking elsewhere.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for SMPD1 in dopamine neurons.

case closed: nothing better to follow up.

Receipts

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