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Sex-dimorphic genetic effects and novel loci for fasting glucose and insulin variability

Lagou, Vasiliki ; Krus, Ulrika LU ; Groop, Leif LU ; Tuomi, Tiinamaija LU ; Lyssenko, Valeriya LU and Prokopenko, Inga (2021) In Nature Communications 12(1).
Abstract
Differences between sexes contribute to variation in the levels of fasting glucose and insulin. Epidemiological studies established a higher prevalence of impaired fasting glucose in men and impaired glucose tolerance in women, however, the genetic component underlying this phenomenon is not established. We assess sex-dimorphic (73,089/50,404 women and 67,506/47,806 men) and sex-combined (151,188/105,056 individuals) fasting glucose/fasting insulin genetic effects via genome-wide association study meta-analyses in individuals of European descent without diabetes. Here we report sex dimorphism in allelic effects on fasting insulin at IRS1 and ZNF12 loci, the latter showing higher RNA expression in whole blood in women compared to men. We... (More)
Differences between sexes contribute to variation in the levels of fasting glucose and insulin. Epidemiological studies established a higher prevalence of impaired fasting glucose in men and impaired glucose tolerance in women, however, the genetic component underlying this phenomenon is not established. We assess sex-dimorphic (73,089/50,404 women and 67,506/47,806 men) and sex-combined (151,188/105,056 individuals) fasting glucose/fasting insulin genetic effects via genome-wide association study meta-analyses in individuals of European descent without diabetes. Here we report sex dimorphism in allelic effects on fasting insulin at IRS1 and ZNF12 loci, the latter showing higher RNA expression in whole blood in women compared to men. We also observe sex-homogeneous effects on fasting glucose at seven novel loci. Fasting insulin in women shows stronger genetic correlations than in men with waist-to-hip ratio and anorexia nervosa. Furthermore, waist-to-hip ratio is causally related to insulin resistance in women, but not in men. These results position dissection of metabolic and glycemic health sex dimorphism as a steppingstone for understanding differences in genetic effects between women and men in related phenotypes. © 2021, The Author(s). (Less)
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Nature Communications
volume
12
issue
1
article number
24
publisher
Nature Publishing Group
external identifiers
  • scopus:85099096262
  • pmid:33402679
ISSN
2041-1723
DOI
10.1038/s41467-020-19366-9
language
English
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yes
id
552b88a0-b694-4dd6-afd2-b25ccd8b584f
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2021-01-19 09:24:58
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2021-01-20 03:00:14
@article{552b88a0-b694-4dd6-afd2-b25ccd8b584f,
  abstract     = {Differences between sexes contribute to variation in the levels of fasting glucose and insulin. Epidemiological studies established a higher prevalence of impaired fasting glucose in men and impaired glucose tolerance in women, however, the genetic component underlying this phenomenon is not established. We assess sex-dimorphic (73,089/50,404 women and 67,506/47,806 men) and sex-combined (151,188/105,056 individuals) fasting glucose/fasting insulin genetic effects via genome-wide association study meta-analyses in individuals of European descent without diabetes. Here we report sex dimorphism in allelic effects on fasting insulin at IRS1 and ZNF12 loci, the latter showing higher RNA expression in whole blood in women compared to men. We also observe sex-homogeneous effects on fasting glucose at seven novel loci. Fasting insulin in women shows stronger genetic correlations than in men with waist-to-hip ratio and anorexia nervosa. Furthermore, waist-to-hip ratio is causally related to insulin resistance in women, but not in men. These results position dissection of metabolic and glycemic health sex dimorphism as a steppingstone for understanding differences in genetic effects between women and men in related phenotypes. © 2021, The Author(s).},
  author       = {Lagou, Vasiliki and Krus, Ulrika and Groop, Leif and Tuomi, Tiinamaija and Lyssenko, Valeriya and Prokopenko, Inga},
  issn         = {2041-1723},
  language     = {eng},
  number       = {1},
  publisher    = {Nature Publishing Group},
  series       = {Nature Communications},
  title        = {Sex-dimorphic genetic effects and novel loci for fasting glucose and insulin variability},
  url          = {http://dx.doi.org/10.1038/s41467-020-19366-9},
  doi          = {10.1038/s41467-020-19366-9},
  volume       = {12},
  year         = {2021},
}