Androgen regulation of pulmonary AR, TMPRSS2 and ACE2 with implications for sex-discordant COVID-19 outcomes

Sci Rep. 2021 May 27;11(1):11130. doi: 10.1038/s41598-021-90491-1.

Abstract

The sex discordance in COVID-19 outcomes has been widely recognized, with males generally faring worse than females and a potential link to sex steroids. A plausible mechanism is androgen-induced expression of TMPRSS2 and/or ACE2 in pulmonary tissues that may increase susceptibility or severity in males. This hypothesis is the subject of several clinical trials of anti-androgen therapies around the world. Here, we investigated the sex-associated TMPRSS2 and ACE2 expression in human and mouse lungs and interrogated the possibility of pharmacologic modification of their expression with anti-androgens. We found no evidence for increased TMPRSS2 expression in the lungs of males compared to females in humans or mice. Furthermore, in male mice, treatment with the androgen receptor antagonist enzalutamide did not decrease pulmonary TMPRSS2. On the other hand, ACE2 and AR expression was sexually dimorphic and higher in males than females. ACE2 was moderately suppressible with enzalutamide administration. Our work suggests that sex differences in COVID-19 outcomes attributable to viral entry are independent of TMPRSS2. Modest changes in ACE2 could account for some of the sex discordance.

Publication types

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

MeSH terms

  • Androgen Receptor Antagonists / pharmacology
  • Androgens
  • Angiogenesis Inhibitors / pharmacology*
  • Angiotensin-Converting Enzyme 2 / genetics
  • Angiotensin-Converting Enzyme 2 / metabolism*
  • Animals
  • Benzamides / pharmacology
  • COVID-19 / genetics
  • COVID-19 / metabolism*
  • Cell Line, Tumor
  • Chromatin Immunoprecipitation Sequencing
  • Female
  • Gene Expression Regulation / drug effects
  • Gene Expression Regulation / genetics
  • Humans
  • Immunohistochemistry
  • Lung / drug effects*
  • Lung / metabolism
  • Lung / virology
  • Male
  • Mice
  • Nitriles / pharmacology
  • Phenylthiohydantoin / pharmacology
  • Receptors, Androgen / metabolism*
  • Serine Endopeptidases / genetics
  • Serine Endopeptidases / metabolism*
  • Smokers

Substances

  • Androgen Receptor Antagonists
  • Androgens
  • Angiogenesis Inhibitors
  • Benzamides
  • Nitriles
  • Receptors, Androgen
  • Phenylthiohydantoin
  • enzalutamide
  • Angiotensin-Converting Enzyme 2
  • Serine Endopeptidases
  • TMPRSS2 protein, human