Placental superoxide dismutase 3 mediates benefits of maternal exercise on offspring health

Cell Metab. 2021 May 4;33(5):939-956.e8. doi: 10.1016/j.cmet.2021.03.004. Epub 2021 Mar 25.

Abstract

Poor maternal diet increases the risk of obesity and type 2 diabetes in offspring, adding to the ever-increasing prevalence of these diseases. In contrast, we find that maternal exercise improves the metabolic health of offspring, and here, we demonstrate that this occurs through a vitamin D receptor-mediated increase in placental superoxide dismutase 3 (SOD3) expression and secretion. SOD3 activates an AMPK/TET signaling axis in fetal offspring liver, resulting in DNA demethylation at the promoters of glucose metabolic genes, enhancing liver function, and improving glucose tolerance. In humans, SOD3 is upregulated in serum and placenta from physically active pregnant women. The discovery of maternal exercise-induced cross talk between placenta-derived SOD3 and offspring liver provides a central mechanism for improved offspring metabolic health. These findings may lead to novel therapeutic approaches to limit the transmission of metabolic disease to the next generation.

Keywords: AMPK; DNA methylation; TET; glucose metabolism; maternal exercise; placenta; pregnancy; superoxide dismutase 3; vitamin D.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • AMP-Activated Protein Kinases / metabolism
  • Animals
  • Cells, Cultured
  • DNA Demethylation
  • Diet, High-Fat
  • Exercise*
  • Female
  • Hepatocytes / cytology
  • Hepatocytes / metabolism
  • Humans
  • Liver / metabolism
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Mixed Function Oxygenases / genetics
  • Mixed Function Oxygenases / metabolism
  • Placenta / metabolism*
  • Pregnancy
  • Proto-Oncogene Proteins / genetics
  • Proto-Oncogene Proteins / metabolism
  • Receptors, Calcitriol / metabolism
  • Signal Transduction
  • Superoxide Dismutase / genetics
  • Superoxide Dismutase / metabolism*

Substances

  • Proto-Oncogene Proteins
  • Receptors, Calcitriol
  • Mixed Function Oxygenases
  • TET1 protein, human
  • SOD3 protein, human
  • Superoxide Dismutase
  • AMP-Activated Protein Kinases