Six readers
| reader | found | score |
|---|---|---|
| genetics Open Targets | no genetic evidence; overall 0.07 from other evidence | 0.00 |
| cell type Human Protein Atlas | cell type enhanced, including brain excitatory neurons; strongest in mast cells | 0.75 |
| chemistry Open Targets | reachable by antibody | 0.45 |
| trials ClinicalTrials.gov | no Parkinson's trials on record: an open field | 1.00 |
| literature PubMed | no papers tie it to Parkinson's yet | 1.00 |
| pathways Reactome | 4 pathways; mostly protein handling | 0.90 |
Knock down and overexpress COL13A1 in dopamine neurons; measure proteasome activity and the load of ubiquitinated protein 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
- proteasome activity and the load of ubiquitinated protein
- 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 proteasome activity 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 COL13A1 in iPSC-derived midbrain dopamine neurons (FOXA2+, LMX1A+, TH+); n = 3 differentiations; readouts: proteasome activity and the load of ubiquitinated protein; 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
- COL13A1 in dopamine neurons, braak-0.56 (p 0.116) → -0.17 (p 0.656)receipt 3717
Swarm cases
receipt 3717: COL13A1 in dopamine neurons, braak
- power
- full sample -0.36 (p 0.148, n 18), 95% CI -0.71 to +0.13. the interval is wide: not enough donors to tell.
- confounder
- adjusted for sex: -0.36 (p 0.148, n 18). does not hold up.
- composition
- dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.51 (p 0.032, n 18). not the mix.
- skeptic
- leave-one-out range -0.52 to -0.28, sign flips 0; without severely affected donors -0.36 (p 0.148, n 18). fragile.
- cell type
- no other cell group does better.
- axis
- no measure beats "tracks Braak Lewy-body stage" for COL13A1 in dopamine neurons.
case closed: nothing better to follow up.
Receipts
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