Six readers
| reader | found | score |
|---|---|---|
| genetics Open Targets | no genetic evidence; overall 0.09 from other evidence | 0.00 |
| cell type Human Protein Atlas | cell type enhanced, including brain inhibitory neurons; strongest in cardiomyocytes | 0.75 |
| chemistry Open Targets | compounds already reach it: capeserod, piboserod, prucalopride succinate +22 | 1.00 |
| trials ClinicalTrials.gov | no Parkinson's trials on record: an open field | 1.00 |
| literature PubMed | 1 Parkinson's papers of 179 | 0.91 |
| pathways Reactome | 2 pathways; mostly other | 0.30 |
Knock down and overexpress HTR4 in dopamine neurons; measure a transcriptome-wide state shift (bulk RNA-seq) 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; existing compounds already reach the inhibition arm.
- Molecular readout
- a transcriptome-wide state shift (bulk RNA-seq)
- 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 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 HTR4 in iPSC-derived midbrain dopamine neurons (FOXA2+, LMX1A+, TH+); n = 3 differentiations; readouts: a transcriptome-wide state shift (bulk RNA-seq); 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
- HTR4 in dopamine neurons, braak+0.40 (p 0.288) → +0.43 (p 0.251)receipt 2923
Swarm cases
receipt 2923: HTR4 in dopamine neurons, braak
- power
- full sample +0.44 (p 0.069, n 18), 95% CI -0.04 to +0.75. the interval is wide: not enough donors to tell.
- confounder
- adjusted for sex: +0.42 (p 0.080, n 18). does not hold up.
- composition
- dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: +0.37 (p 0.135, n 18). could be the mix.
- skeptic
- leave-one-out range +0.36 to +0.55, sign flips 0; without severely affected donors +0.44 (p 0.069, n 18). robust.
- cell type
- no other cell group does better.
- axis
- no measure beats "tracks Braak Lewy-body stage" for HTR4 in dopamine neurons.
case closed: nothing better to follow up.
Receipts
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