1. Polygenic transcriptome risk scores for COPD and lung function improve cross-ethnic portability of prediction in the NHLBI TOPMed program
- Author
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Hu, Xiaowei, Qiao, Dandi, Kim, Wonji, Moll, Matthew, Balte, Pallavi P, Lange, Leslie A, Bartz, Traci M, Kumar, Rajesh, Li, Xingnan, Yu, Bing, Cade, Brian E, Laurie, Cecelia A, Sofer, Tamar, Ruczinski, Ingo, Nickerson, Deborah A, Muzny, Donna M, Metcalf, Ginger A, Doddapaneni, Harshavardhan, Gabriel, Stacy, Gupta, Namrata, Dugan-Perez, Shannon, Cupples, L Adrienne, Loehr, Laura R, Jain, Deepti, Rotter, Jerome I, Wilson, James G, Psaty, Bruce M, Fornage, Myriam, Morrison, Alanna C, Vasan, Ramachandran S, Washko, George, Rich, Stephen S, O’Connor, George T, Bleecker, Eugene, Kaplan, Robert C, Kalhan, Ravi, Redline, Susan, Gharib, Sina A, Meyers, Deborah, Ortega, Victor, Dupuis, Josée, London, Stephanie J, Lappalainen, Tuuli, Oelsner, Elizabeth C, Silverman, Edwin K, Barr, R Graham, Thornton, Timothy A, Wheeler, Heather E, Group, TOPMed Lung Working, Cho, Michael H, Im, Hae Kyung, and Manichaikul, Ani
- Subjects
Epidemiology ,Biological Sciences ,Health Sciences ,Genetics ,Clinical Research ,Lung ,Prevention ,Tobacco ,Chronic Obstructive Pulmonary Disease ,Tobacco Smoke and Health ,Respiratory ,Good Health and Well Being ,Humans ,National Heart ,Lung ,and Blood Institute (U.S.) ,Pulmonary Disease ,Chronic Obstructive ,Risk Factors ,Transcriptome ,United States ,TOPMed Lung Working Group ,cross-ethnic portability ,gene expression ,integrative analysis ,polygenic transcriptome risk score ,pulmonary disease ,risk prediction ,Medical and Health Sciences ,Genetics & Heredity ,Biological sciences ,Biomedical and clinical sciences ,Health sciences - Abstract
While polygenic risk scores (PRSs) enable early identification of genetic risk for chronic obstructive pulmonary disease (COPD), predictive performance is limited when the discovery and target populations are not well matched. Hypothesizing that the biological mechanisms of disease are shared across ancestry groups, we introduce a PrediXcan-derived polygenic transcriptome risk score (PTRS) to improve cross-ethnic portability of risk prediction. We constructed the PTRS using summary statistics from application of PrediXcan on large-scale GWASs of lung function (forced expiratory volume in 1 s [FEV1] and its ratio to forced vital capacity [FEV1/FVC]) in the UK Biobank. We examined prediction performance and cross-ethnic portability of PTRS through smoking-stratified analyses both on 29,381 multi-ethnic participants from TOPMed population/family-based cohorts and on 11,771 multi-ethnic participants from TOPMed COPD-enriched studies. Analyses were carried out for two dichotomous COPD traits (moderate-to-severe and severe COPD) and two quantitative lung function traits (FEV1 and FEV1/FVC). While the proposed PTRS showed weaker associations with disease than PRS for European ancestry, the PTRS showed stronger association with COPD than PRS for African Americans (e.g., odds ratio [OR] = 1.24 [95% confidence interval [CI]: 1.08-1.43] for PTRS versus 1.10 [0.96-1.26] for PRS among heavy smokers with ≥ 40 pack-years of smoking) for moderate-to-severe COPD. Cross-ethnic portability of the PTRS was significantly higher than the PRS (paired t test p
- Published
- 2022