Determinants of mosaic chromosomal alteration fitness

Yash Pershad, Taralynn Mack, Hannah Poisner, Yasminka A. Jakubek, Adrienne M. Stilp, Braxton D. Mitchell, Joshua P. Lewis, Eric Boerwinkle, Ruth J.F. Loos, Nathalie Chami, Zhe Wang, Kathleen Barnes, Nathan Pankratz, Myriam Fornage, Susan Redline, Bruce M. Psaty, Joshua C. Bis, Ali Shojaie, Edwin K. Silverman, Michael H. ChoJeong H. Yun, Dawn DeMeo, Daniel Levy, Andrew D. Johnson, Rasika A. Mathias, Margaret A. Taub, Donna Arnett, Kari E. North, Laura M. Raffield, April P. Carson, Margaret F. Doyle, Stephen S. Rich, Jerome I. Rotter, Xiuqing Guo, Nancy J. Cox, Dan M. Roden, Nora Franceschini, Pinkal Desai, Alex P. Reiner, Paul L. Auer, Paul A. Scheet, Siddhartha Jaiswal, Joshua S. Weinstock, Alexander G. Bick

Research output: Contribution to journalArticlepeer-review

Abstract

Clonal hematopoiesis (CH) is characterized by the acquisition of a somatic mutation in a hematopoietic stem cell that results in a clonal expansion. These driver mutations can be single nucleotide variants in cancer driver genes or larger structural rearrangements called mosaic chromosomal alterations (mCAs). The factors that influence the variations in mCA fitness and ultimately result in different clonal expansion rates are not well understood. We used the Passenger-Approximated Clonal Expansion Rate (PACER) method to estimate clonal expansion rate as PACER scores for 6,381 individuals in the NHLBI TOPMed cohort with gain, loss, and copy-neutral loss of heterozygosity mCAs. Our mCA fitness estimates, derived by aggregating per-individual PACER scores, were correlated (R2 = 0.49) with an alternative approach that estimated fitness of mCAs in the UK Biobank using population-level distributions of clonal fraction. Among individuals with JAK2 V617F clonal hematopoiesis of indeterminate potential or mCAs affecting the JAK2 gene on chromosome 9, PACER score was strongly correlated with erythrocyte count. In a cross-sectional analysis, genome-wide association study of estimates of mCA expansion rate identified a TCL1A locus variant associated with mCA clonal expansion rate, with suggestive variants in NRIP1 and TERT.

Original languageEnglish
Article number3800
JournalNature Communications
Volume15
Issue number1
DOIs
StatePublished - Dec 2024

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