Prenatal hypoxia increases susceptibility to kidney injury

PLoS One. 2020 Feb 21;15(2):e0229618. doi: 10.1371/journal.pone.0229618. eCollection 2020.

Abstract

Prenatal hypoxia is a gestational stressor that can result in developmental abnormalities or physiological reprogramming, and often decreases cellular capacity against secondary stress. When a developing fetus is exposed to hypoxia, blood flow is preferentially redirected to vital organs including the brain and heart over other organs including the kidney. Hypoxia-induced injury can lead to structural malformations in the kidney; however, even in the absence of structural lesions, hypoxia can physiologically reprogram the kidney leading to decreased function or increased susceptibility to injury. Our investigation in mice reveals that while prenatal hypoxia does not affect normal development of the kidneys, it primes the kidneys to have an increased susceptibility to kidney injury later in life. We found that our model does not develop structural abnormalities when prenatally exposed to modest 12% O2 as evident by normal histological characterization and gene expression analysis. Further, adult renal structure and function is comparable to mice exposed to ambient oxygen throughout nephrogenesis. However, after induction of kidney injury with a nephrotoxin (cisplatin), the offspring of mice housed in hypoxia exhibit significantly reduced renal function and proximal tubule damage following injury. We conclude that exposure to prenatal hypoxia in utero physiologically reprograms the kidneys leading to increased susceptibility to injury later in life.

Publication types

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

MeSH terms

  • Acute Kidney Injury / embryology
  • Acute Kidney Injury / etiology*
  • Animals
  • Cisplatin / adverse effects
  • Cisplatin / pharmacology
  • Female
  • Fetal Hypoxia / physiopathology
  • Hemodynamics
  • Hypoxia / metabolism*
  • Hypoxia / physiopathology
  • Kidney / embryology
  • Kidney / metabolism*
  • Kidney Tubules, Proximal / drug effects
  • Kidney Tubules, Proximal / metabolism
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Oxygen / metabolism
  • Pregnancy
  • Prenatal Exposure Delayed Effects / metabolism

Substances

  • Cisplatin
  • Oxygen