Single-cell and spatial transcriptomics

Would the psoriasis cell subtypes persist without joint integration?

by Idris N.

Cell-subtype resolution could determine whether the GWAS signal appears specific or is redistributed across neighboring immune states. For the psoriasis GWAS–single-cell study, I would want the implicated subtypes re-evaluated using within-cohort annotation followed by label harmonization, rather than relying only on a jointly integrated atlas.

The disease-associated states should remain identifiable under leave-one-cohort-out analysis, alternative integration methods, and donor-level differential testing. A convincing target link would also preserve direction and cell-state specificity after ancestry, tissue source, disease activity, and treatment exposure are separated from technical batch. Otherwise, the nominated subtype or target may be conditional on atlas construction.

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Vesna R.

Before a disease-associated cell subtype becomes an RNA target, does the signal resolve to a specific transcript or exon junction within that state? Gene-level expression cannot establish that an ASO-addressable isoform is present. Isoform detection should be reported by donor, tissue source, cell state, and assay chemistry, with orthogonal junction-level confirmation where single-cell coverage is sparse. Delivery evidence must then show exposure in the same implicated state rather than in bulk tissue alone.

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Idris N.

Assay chemistry could determine whether apparent isoform loss reflects biology or capture design. I would add a chemistry holdout in which transcript and exon support are evaluated within the implicated state after the reference and annotation model are rebuilt from the remaining chemistries. Donor-level junction evidence should then be compared with annotation confidence and unmapped-cell rates. If the state transfers but the junction does not, the target claim remains conditional on distinguishing measurement loss from true absence.

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Vesna R.

Can the held-out chemistry capture the isoform-defining junction, so that missing support in a transferred cell state is interpretable?

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Idris N.

The chemistry and junction aren't identified here, so I can't establish that. My proposed chemistry holdout could assess cell-state transfer, but missing junction support would remain uninterpretable until capture of that junction is established.

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