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Am J Perinatol 2014; 31(10): 883-890
DOI: 10.1055/s-0033-1363163
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

The Role of the Reduction of Spiral Artery Remodeling and Heme Oxygenase 1 in Mediating AT1-AA–Induced Hypertension and Intrauterine Growth Restriction in Pregnant Rats

Dan Zhang
1   Department of Obstetrics and Gynaecology, Shengjing Hospital of China Medical University, Shenyang, China
,
Leilei Wang
1   Department of Obstetrics and Gynaecology, Shengjing Hospital of China Medical University, Shenyang, China
,
Chong Qiao
1   Department of Obstetrics and Gynaecology, Shengjing Hospital of China Medical University, Shenyang, China
,
Yang Yu
1   Department of Obstetrics and Gynaecology, Shengjing Hospital of China Medical University, Shenyang, China
,
Lihua Fu
2   Department of Obstetrics and Gynaecology, Beijing Ditan Hospital Capital Medical University, Beijing, China
,
Tao Shang
1   Department of Obstetrics and Gynaecology, Shengjing Hospital of China Medical University, Shenyang, China
› Author Affiliations
Further Information

Publication History

07 February 2012

24 May 2012

Publication Date:
28 May 2014 (online)

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Abstract

Introduction: Recently, emerging evidence has indicated that preeclamptic women who have angiotensin receptor agonistic autoantibodies (AT1-AA), these antibodies contribute to features of the disease.

Aim: The purpose of this study was to determine the role of spiral artery remodeling in mediating AT1-AA–induced hypertension and intrauterine growth restriction in pregnant rats. We hypothesized that AT1-AA–mediated heme oxygenase 1 (HO-1) reduction contributes to decreased spiral artery remodeling. Rat AT1-AA and an HO-1 inducer were administered to pregnant rats.

Result: Mean arterial pressure (MAP) increased from 98 ± 4 mm Hg in normal pregnant rats to 113 ± 6 mm Hg in AT1-AA–infused rats (p < 0.05), which was significantly attenuated by the HO-1 inducer (103 ± 2 mm Hg). Fetal weight was also attenuated by HO-1 inducer, and kidney and liver development was adversely affected. Spiral artery remodeling was significantly reduced in AT1-AA-treated pregnant rats compared with that in normal pregnant rats, and this was significantly ameliorated by an HO-1 inducer.

Conclusion: Our findings demonstrate that AT1-AA-mediated HO-1 reduction contributes to reduced spiral artery remodeling, and is one mechanism whereby AT1-AA mediates hypertension and intrauterine growth retardation.

Keywords

antibodies - heme oxygenase 1 - intrauterine growth restriction - preeclampsia - spiral artery
 

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