Base by Base12 Nov 2025

196: Impact of Chromatin Accessibility QTLs Across Immune Contexts

Impact of Chromatin Accessibility QTLs Across Immune Contexts

Music:
Enjoy the music based on this article at the end of the episode.

License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/

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Episode link: https://basebybase.com/episodes/impact-of-chromatin-accessibility-qtls-across-immune-contexts

QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2025-11-12.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited core caQTL biology and context: PBMC-wide caQTL mapping; dynamic caQTLs along cell trajectories; COVID-19 contexts and heritability enrichment; caQTL–eQTL–GWAS integration; ABC-based distal linking; CARD9 case in monocytes; emphasis on triple convergence for causal inference.
- transcript topics: Single-cell caQTL mapping in PBMCs across healthy, COVID-19, convalescent; caQTL–eQTL–GWAS integration and interpretability; Topic modeling and cell-state trajectories of caQTLs; Dynamic caQTLs during activation (k17 CD8 TEM); COVID-19 cellular context and heritability enrichment; Distal caQTLs and ABC-based enhancer–gene linking

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- caQTL count across PBMCs: 37,390
- dynamic caQTLs identified: 4,200
- caQTL sharing: less than 20% confined to a single context
- increase in GWAS-loci explainable when incorporating caQTLs (from ~32.9% to ~57.3%)
- COVID-19 cell-state k17 enriched for disease-relevant heritability (severe COVID-19)
- triple convergence (GWAS locus + caQTL + eQTL) in the same cellular context

QC result: Pass.

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