Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Gene record

DNAJC13

DnaJ heat shock protein family (Hsp40) member C13

translation score 0.55, read 2026-10-27; 3 sealed predictions, 0 held; 3 receipts.

Six readers

readerfoundscore
genetics
Open Targets		genetic association 0.66 (overall 0.58)0.66
cell type
Human Protein Atlas		expressed broadly, no clear home in brain cells0.40
chemistry
Open Targets		reachable by antibody0.45
trials
ClinicalTrials.gov		no Parkinson's trials on record: an open field1.00
literature
PubMed		41 Parkinson's papers of 700.51
pathways
Reactome		1 pathway; mostly other0.30
proposal for DNAJC13, translation score 0.55

Knock down and overexpress DNAJC13 in a dopamine neuron, astrocyte and microglia tri-culture; measure a transcriptome-wide state shift (bulk RNA-seq) and dopamine neuron survival after α-synuclein fibril challenge.

Cell type
a dopamine neuron, astrocyte and microglia tri-culture
Direction
Both arms: public data does not say which way helps.
Molecular readout
a transcriptome-wide state shift (bulk RNA-seq)
Functional readout
dopamine neuron survival after α-synuclein fibril challenge
Rule-out
If neither arm moves a transcriptome-wide state shift (bulk RNA-seq) 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 DNAJC13 in a tri-culture of iPSC dopamine neurons, astrocytes and microglia; n = 3 differentiations; readouts: a transcriptome-wide state shift (bulk RNA-seq); dopamine neuron survival after α-synuclein fibril challenge. Controls: non-targeting guide, empty vector. About 8 to 10 weeks, most of it differentiation.

Earlier readings: 2026-10-26 0.55; 2026-10-25 0.55; 2026-10-24 0.55; 2026-10-23 0.55.

Sealed predictions

  1. DNAJC13 in dopamine neurons, braak-0.21 (p 0.586) → +0.00 (p 1.000)receipt 0571
  2. DNAJC13 in dopamine neurons, resiliencen/a → n/areceipt 0104
  3. DNAJC13 in dopamine neurons, braakn/a → n/areceipt 0103

Swarm cases

receipt 0571: DNAJC13 in dopamine neurons, braak

power
full sample -0.14 (p 0.585, n 18), 95% CI -0.57 to +0.35. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.12 (p 0.627, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.10 (p 0.683, n 18). could be the mix.
skeptic
leave-one-out range -0.25 to -0.01, sign flips 0; without severely affected donors -0.14 (p 0.585, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for DNAJC13 in dopamine neurons.

case closed: nothing better to follow up.

receipt 0104: DNAJC13 in dopamine neurons, resilience

cell type
DNAJC13 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 DNAJC13 in dopamine neurons.

case closed: nothing better to follow up.

receipt 0103: DNAJC13 in dopamine neurons, braak

cell type
DNAJC13 is not measured in dopamine neurons; looking elsewhere.
cell type
strongest in oligodendrocytes: +0.60 (p 1.5e-9, n 84). proposing oligodendrocytes.
axis
no measure beats "tracks Braak Lewy-body stage" for DNAJC13 in dopamine neurons.

follow-up confirmed in ventral tegmental area.
follow-up DNAJC13 · oligodendrocytes · braak: ventral tegmental area +0.50 p 1.9e-6 (needs p < 0.0036)

Receipts

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