Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Gene record

PTPN5

protein tyrosine phosphatase non-receptor type 5

translation score 0.60, read 2026-10-24; 1 sealed predictions, 0 held; 1 receipts.

Six readers

readerfoundscore
genetics
Open Targets
no genetic evidence; overall 0.01 from other evidence0.00
cell type
Human Protein Atlas
group enriched in brain inhibitory neurons (164 nCPM)1.00
chemistry
Open Targets
a small-molecule pocket0.60
trials
ClinicalTrials.gov
no Parkinson's trials on record: an open field1.00
literature
PubMed
3 Parkinson's papers of 560.82
pathways
Reactome
1 pathway; mostly immune signalling0.90
proposal for PTPN5, translation score 0.60

Knock down and overexpress PTPN5 in dopamine neurons; measure IL-1β and TNF release and surface HLA-DR and survival of TH-positive neurons and phospho-α-synuclein (pS129) inclusions after seeding with α-synuclein fibrils.

Cell type
dopamine neurons
Direction
Both arms: public data does not say which way helps.
Molecular readout
IL-1β and TNF release and surface HLA-DR
Functional readout
survival of TH-positive neurons and phospho-α-synuclein (pS129) inclusions after seeding with α-synuclein fibrils
Rule-out
If neither arm moves IL-1β by 20% or more against non-targeting and empty-vector controls, across three independent differentiations, the hypothesis is wrong.
Lab request
CRISPRi knockdown and lentiviral overexpression of PTPN5 in iPSC-derived midbrain dopamine neurons (FOXA2+, LMX1A+, TH+); n = 3 differentiations; readouts: IL-1β and TNF release and surface HLA-DR; survival of TH-positive neurons and phospho-α-synuclein (pS129) inclusions after seeding with α-synuclein fibrils. Controls: non-targeting guide, empty vector. About 8 to 10 weeks, most of it differentiation.

Sealed predictions

  1. PTPN5 in dopamine neurons, braak-0.38 (p 0.315) → +0.27 (p 0.489)receipt 8684

Swarm cases

receipt 8684: PTPN5 in dopamine neurons, braak

power
full sample -0.15 (p 0.555, n 18), 95% CI -0.58 to +0.34. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.15 (p 0.555, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.31 (p 0.207, n 18). could be the mix.
skeptic
leave-one-out range -0.28 to -0.04, sign flips 0; without severely affected donors -0.15 (p 0.555, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PTPN5 in dopamine neurons.

case closed: nothing better to follow up.

Receipts

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