Coordinated regulatory variation associated with gestational hyperglycaemia regulates expression of the novel hexokinase HKDC1.

Journal Article

Maternal glucose levels during pregnancy impact the developing fetus, affecting metabolic health both early and later on in life. Both genetic and environmental factors influence maternal metabolism, but little is known about the genetic mechanisms that alter glucose metabolism during pregnancy. Here, we report that haplotypes previously associated with gestational hyperglycaemia in the third trimester disrupt regulatory element activity and reduce expression of the nearby HKDC1 gene. We further find that experimentally reducing or increasing HKDC1 expression reduces or increases hexokinase activity, respectively, in multiple cellular models; in addition, purified HKDC1 protein has hexokinase activity in vitro. Together, these results suggest a novel mechanism of gestational glucose regulation in which the effects of genetic variants in multiple regulatory elements alter glucose homeostasis by coordinately reducing expression of the novel hexokinase HKDC1.

Full Text

Duke Authors

Cited Authors

  • Guo, C; Ludvik, AE; Arlotto, ME; Hayes, MG; Armstrong, LL; Scholtens, DM; Brown, CD; Newgard, CB; Becker, TC; Layden, BT; Lowe, WL; Reddy, TE

Published Date

  • February 4, 2015

Published In

Volume / Issue

  • 6 /

Start / End Page

  • 6069 -

PubMed ID

  • 25648650

Electronic International Standard Serial Number (EISSN)

  • 2041-1723

International Standard Serial Number (ISSN)

  • 2041-1723

Digital Object Identifier (DOI)

  • 10.1038/ncomms7069

Language

  • eng