{"id":4608,"date":"2025-12-17T14:34:10","date_gmt":"2025-12-17T07:34:10","guid":{"rendered":"https:\/\/www2.si.mahidol.ac.th\/department\/biochemistry\/?p=4608"},"modified":"2025-12-17T14:34:55","modified_gmt":"2025-12-17T07:34:55","slug":"single-cell-rna-sequencing-of-peripheral-blood-links-cell-type-specific-regulation-of-splicing-to-autoimmune-and-inflammatory-diseases","status":"publish","type":"post","link":"https:\/\/www2.si.mahidol.ac.th\/department\/biochemistry\/en\/single-cell-rna-sequencing-of-peripheral-blood-links-cell-type-specific-regulation-of-splicing-to-autoimmune-and-inflammatory-diseases\/","title":{"rendered":"Single-cell RNA sequencing of peripheral blood links cell-type-specific regulation of splicing to autoimmune and inflammatory diseases"},"content":{"rendered":"
Alternative splicing contributes to complex traits, but whether this differs in trait-relevant cell types across diverse genetic ancestries is unclear. Here we describe cell-type-specific, sex-biased and ancestry-biased alternative splicing in ~1 M peripheral blood mononuclear cells from 474 healthy donors from the Asian Immune Diversity Atlas. We identify widespread sex-biased and ancestry-biased differential splicing, most of which is cell-type-specific. We identify 11,577 independent cis-splicing quantitative trait loci (sQTLs), 607 trans-sGenes and 107 dynamic sQTLs. Colocalization between cis-eQTLs and trans-sQTLs revealed a cell-type-specific regulatory relationship between HNRNPLL and PTPRC. We observed an enrichment of cis-sQTL effects in autoimmune and inflammatory disease heritability. Specifically, we functionally validated an Asian-specific sQTL disrupting the 5′ splice site of TCHP exon 4 that putatively modulates the risk of Graves’ disease in East Asian populations. Our work highlights the impact of ancestral diversity on splicing and provides a roadmap to dissect its role in complex diseases at single-cell resolution.<\/p>\n