Genetic variation near IRS1 is associated with adiposity and a favorable metabolic profile in U.S. Hispanics/Latinos

Qibin Qi, Stephanie M. Gogarten, Leslie S. Emery, Tin Louie, Adrienne Stilp, Jianwen Cai, Neil Schneiderman, M. Larissa Avilés-Santa, Robert C. Kaplan, Kari E. North, Cathy C. Laurie, Ruth J.F. Loos, Carmen R. Isasi

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Objective: Associations of IRS1 genetic variation with adiposity and metabolic profile in U.S. Hispanic/Latino individuals of diverse backgrounds were examined. Methods: Previously genome-wide association study-identified IRS1 variants (rs2943650, rs2972146, rs2943641, and rs2943634) as related to body fat percentage (BF%) and multiple metabolic traits were tested among up to 12,730 adults (5,232 men; 7,515 women) from the Hispanic Community Health Study/Study of Latinos. Results: The C-allele (frequency = 26%) of rs2943650 was significantly associated with higher BF% overall (β = 0.34 ± 0.11% per allele; P = 0.002) and in women (β = 0.41 ± 0.14% per C-allele; P = 0.003), but not in men (β = 0.28 ± 0.18% per C-allele; P = 0.11), though there was no significant sex difference. Using the inverse normal-transformed data to compare effect sizes, it was found that the association with BF% was stronger in Hispanic/Latino women than that previously reported in European women (β = 0.054 ± 0.018SD vs. β = 0.008 ± 0.011SD per C-allele; P = 0.03). The BF%-increasing allele of rs2943650 was significantly associated with lower levels of fasting insulin, homeostatic model assessment of insulin resistance, hemoglobin A1c, and triglycerides and higher high-density lipoprotein cholesterol (P < 0.05). Conclusions: This study confirmed and extended previous findings of IRS1 variation associated with increased adiposity but a favorable metabolic profile in U.S. Hispanics/Latinos, with a relatively stronger genetic effect on BF% in Hispanic/Latino women compared with European women.

Original languageEnglish (US)
Pages (from-to)2407-2413
Number of pages7
JournalObesity
Volume24
Issue number11
DOIs
StatePublished - Nov 1 2016

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology
  • Nutrition and Dietetics

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    Qi, Q., Gogarten, S. M., Emery, L. S., Louie, T., Stilp, A., Cai, J., Schneiderman, N., Avilés-Santa, M. L., Kaplan, R. C., North, K. E., Laurie, C. C., Loos, R. J. F., & Isasi, C. R. (2016). Genetic variation near IRS1 is associated with adiposity and a favorable metabolic profile in U.S. Hispanics/Latinos. Obesity, 24(11), 2407-2413. https://doi.org/10.1002/oby.21624