BloodVariome: a high-resolution atlas of inherited genetic effects in human immune cells
Lopez de Lapuente Portilla, A.; Ekdahl, L.; Thorleifsson, G.; Ali, Z.; Lamarca Arrizabalaga, A.; Cafaro, C.; Saevarsdottir, S.; Thorlacius, G. E.; Halldorsson, G. H.; Stefansdottir, L.; Melsted, P.; Ugidos Damboriena, N.; Pertesi, M.; Sulem, P.; Gudbjartsson, D. F.; Stefansson, K.; Thorsteinsdottir, U.; Jonsdottir, I.; Olafsdottir, T.; Nilsson, B.
Show abstract
Genome-wide association studies have linked thousands of sequence variants to immune-mediated diseases, yet their cellular mechanisms remain largely unresolved. Here we present BloodVariome, a high-resolution atlas of genetic effects across the human immune cell hierarchy. Combining deep immunophenotyping with automated pattern-recognition, we quantified 1,533 traits across 127 immune cell populations in 11,983 individuals. We identified 259 significant associations, the vast majority of which are not captured by conventional bulk blood trait studies. Most associations were restricted to single immune lineages or cell populations, revealing a fine-grained genetic compartmentalization of the immune system. By linking known disease risk alleles to specific immune cell phenotypes, BloodVariome illuminates cellular mechanisms underlying autoimmunity, immunodeficiency, and hematologic malignancy. Moreover, we implicate novel regulators of human immune cell development and function. By bridging the gap between cohort size and phenotypic depth, BloodVariome establishes a high-resolution framework for interpreting how genetic variation shapes cellular immunity at population-scale.
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