Cited by 39Pregnancy and preeclampsia studiesReproductive System and PregnancyNeonatal and fetal brain pathology

Preserved placental oxygenation and development during severe systemic hypoxia

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Schäffer, Leonhard, Vogel, Johannes, Breymann, Christian, Gassmann, Max, Marti, Hugo H.·2006·American Journal of Physiology-Regulatory, Integrative and Comparative Physiology

Abstract

Local tissue oxygenation profoundly influences placental development. To elucidate the impact of hypoxia on cellular and molecular adaptation in vivo, pregnant mice at embryonic days 7.5–11.5 were exposed to reduced environmental oxygen (6–7% O 2 ) for various periods of time. Hypoxia-inducible factor (HIF)-1α mRNA was highly expressed in the placenta, whereas HIF-2α was predominantly found in the decidua, indicating that HIF-1 is a relevant oxygen-dependent factor involved in placental development. During severe hypoxia, HIF-1α protein was strongly induced in the periphery but, however, not in the labyrinth layer of the placenta. Accordingly, no indication for tissue hypoxia in this central area was detected with 2-(2-nitro-1 H-imidazol-1-yl)- N-(2,2,3,3,3-pentafluoropropyl)acetamide staining and VEGF expression as hypoxic markers. The absence of significant tissue hypoxia was reflected by preserved placental architecture and trophoblast differentiation. In the search for mechanisms preventing local hypoxia, we found upregulation of endothelial nitric oxide synthase (NOS) expression in the labyrinth layer. Inhibition of NOS activity by N ω -nitro-l-arginine methyl ester application resulted in ubiquitous placental tissue hypoxia. Our results show that placental oxygenation is preserved even during severe systemic hypoxia and imply that NOS-mediated mechanisms are involved to protect the placenta from maternal hypoxia.

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Crossref · 10.1152/ajpregu.00237.2005

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  • Earlier in gestation, there appears to be little, if any, change in placental morphology during severe hypoxia of the mouse dam.

    “Earlier in gestation, there appears to be little, if any, change in placental morphology during severe hypoxia of the mouse dam (483).”

    From Placental Origins of Chronic Disease (2016) · cites this paper as [483]

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Authors
Schäffer, L., Vogel, J., Breymann, C., Gassmann, M., & Marti, H. H.
Affiliations
  • University Hospital Zurich (CH)
  • University of Zurich (CH)
  • Heidelberg University (DE)
Venue
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology
Published
2006-03
Volume
290
Issue
3
Pages
R844-R851
ISSN
  • 0363-6119 (ISSN-L)
  • 1522-1490
OpenAlex
W1981254978
Cited by
39
References
53
Citations by year
2023: 1 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 2 · 2017: 2 · 2016: 3 · 2015: 4 · 2014: 2 · 2013: 3 · 2012: 3
FWCI
2.42
Type
journal article
Language
en
Open access
Locations
  • American Journal of Physiology-Regulatory, Integrative and Comparative Physiology (publishedVersion)
  • PubMed (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
  • Ministerul Cercetării, Inovării şi Digitalizării
  • Foundation for Research in Science and the Humanities
  • Abramson Family Cancer Research Institute
Topics
  • Health Sciences › Medicine › Obstetrics and Gynecology › Pregnancy and preeclampsia studies
  • Life Sciences › Immunology and Microbiology › Immunology › Reproductive System and Pregnancy
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Neonatal and fetal brain pathology
Keywords
placental oxygenation, systemic hypoxia, placental development, hypoxia-inducible factor-1α, HIF-2α, decidua, endothelial nitric oxide synthase, nitric oxide, trophoblast differentiation, vascular endothelial growth factor, nitric oxide synthase inhibition, L-NAME, maternal hypoxia, fetal development
MeSH terms
Animals, Hypoxia, Female, Oxygen, Placenta, Pregnancy, Tissue Distribution, Mice, Hypoxia-Inducible Factor 1

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