Fructose and glucose can regulate mammalian target of rapamycin complex 1 and lipogenic gene expression via distinct pathways.

Published

Journal Article

Although calorically equivalent to glucose, fructose appears to be more lipogenic, promoting dyslipidemia, fatty liver disease, cardiovascular disease, and diabetes. To better understand how fructose induces lipogenesis, we compared the effects of fructose and glucose on mammalian target of rapamycin complex 1 (mTORC1), which appeared to have both positive and negative effects on lipogenic gene expression. We found that fructose acutely and transiently suppressed mTORC1 signaling in vitro and in vivo The constitutive activation of mTORC1 reduced hepatic lipogenic gene expression and produced hypotriglyceridemia after 1 week of fructose feeding. In contrast, glucose did not suppress mTORC1, and the constitutive activation of mTORC1 failed to suppress plasma triglycerides after 1 week of glucose feeding. Thus, these data reveal fundamental differences in the signaling pathways used by fructose and glucose to regulate lipid metabolism.

Full Text

Duke Authors

Cited Authors

  • Hu, Y; Semova, I; Sun, X; Kang, H; Chahar, S; Hollenberg, AN; Masson, D; Hirschey, MD; Miao, J; Biddinger, SB

Published Date

  • February 9, 2018

Published In

Volume / Issue

  • 293 / 6

Start / End Page

  • 2006 - 2014

PubMed ID

  • 29222328

Pubmed Central ID

  • 29222328

Electronic International Standard Serial Number (EISSN)

  • 1083-351X

Digital Object Identifier (DOI)

  • 10.1074/jbc.M117.782557

Language

  • eng

Conference Location

  • United States