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Am J Obstet Gynecol. 2011 Apr;204(4):332.e1-7. doi: 10.1016/j.ajog.2011.01.012. Epub 2011 Feb 23.

Role of HIF-1α in maternal hyperglycemia-induced embryonic vasculopathy.

Author information

1
Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA.

Abstract

OBJECTIVE:

Maternal diabetes adversely impacts embryonic vasculogenesis, which results in embryonic vasculopathy. The purpose of our study is to determine whether hypoxia inducible factor (HIF)-1α plays a role in diabetic embryonic vasculopathy.

STUDY DESIGN:

Levels of HIF-1α were determined in mouse conceptuses. Conceptuses on day 7 of pregnancy were cultured under euglycemic (150 mg/dL glucose) and hyperglycemic (300 mg/dL) conditions with or without AdCA5, or in the presence or absence of 2.0 μg/mL human recombinant thioredoxin, an endogenous antioxidant protein. AdCA5 is an adenovirus encoding a constitutively active form of HIF-1α.

RESULTS:

Maternal diabetes significantly reduced HIF-1α protein expression. The administration of 1 μL (1 × 10(7) infectious units/mL) per 1 mL culture medium AdCA5 completely reversed hyperglycemia-reduced vasculature morphological scores and vascular endothelial growth factor expression. Thioredoxin treatment reversed hyperglycemia-reduced HIF-1α levels.

CONCLUSION:

We conclude that reduced HIF-1α plays a critical role in the induction of diabetic embryonic vasculopathy, and that oxidative stress is implicated in hyperglycemia-induced HIF-1α reduction.

PMID:
21345401
PMCID:
PMC3198784
DOI:
10.1016/j.ajog.2011.01.012
[Indexed for MEDLINE]
Free PMC Article

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