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BioMed Research International
Volume 2014 (2014), Article ID 982159, 6 pages
http://dx.doi.org/10.1155/2014/982159
Research Article

VEGF and eNOS Expression in Umbilical Cord from Pregnancy Complicated by Hypertensive Disorder with Different Severity

SRM Medical College Hospital & Research Center, Kattankulathur, Kanchipuram, Tamil Nadu 603203, India

Received 30 January 2014; Revised 30 March 2014; Accepted 16 April 2014; Published 14 May 2014

Academic Editor: Takashi Saku

Copyright © 2014 K. Bhavina et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Reduced blood flow in hypertensive pregnancy may influence the production vasoconstrictors; subsequently the vessel remains in highly contracted state. NO is a vasodilator; VEGF influences its synthesis by regulating eNOS production. Aim of our study was to evaluate the expression of VEGF and eNOS in different severity of hypertensive pregnancy. Methods. Study was conducted in 4 groups with 40 members: group 1—control, group 2—gestational hypertension, group 3—mild preeclampsia, and group 4—severe preeclampsia. Fetal end of umbilical cord was taken and follows IHC staining protocol for VEGF and eNOS antibody. Staining intensity were measured by semiquantitative scoring method. Mann Whitney U test was used to compare each group. Results. Decreased expression of both VEGF and eNOS was found in hypertensive condition than in normal condition. Among hypertensive group, severe preeclamptic group showed more intensity in staining than gestational hypertension and mild preeclampsia. Conclusion. Reduction of VEGF and eNOS in gestational hypertension may lead to hypoperfusion and subsequent hypoxia of fetus in hypertensive pregnancy. The developed hypoxic state may upregulate the synthesis of VEGF and thereby eNOS. Increased expression of VEGF and eNOS in severe group may be a compensatory mechanism to dilate the blood vessels and to improve blood flow of fetus.