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Reproductive Health
Published in: Reproductive Health 1/2021

01-12-2021 | Pre-Eclampsia | Research

Association of endothelial nitric oxide synthase gene variants with preeclampsia

Authors: Ghazala Shaheen, Sarwat Jahan, Nousheen Bibi, Asmat Ullah, Rani Faryal, Ali Almajwal, Tayyaba Afsar, Dara Al-disi, Mahmoud Abulmeaty, Abdulaziz Abdullah Al Khuraif, Mohammed Arshad, Suhail Razak

Published in: Reproductive Health | Issue 1/2021

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Abstract

Background

Preeclampsia (PE) is a complex pregnancy hypertensive disorder with multifaceted etiology. The endothelial nitric oxide synthase (eNOS) gene and nitric oxide (NO) levels has been reported to be associated with PE predisposition in various populations. Therefore, present study was designed to investigate the role of NO levels and eNOS gene variants in preeclamptic women in Pakistan.

Methods

A total of 600 women were evaluated, 188 of PE with mild features, 112 of PE with severe features and 300 normotensive pregnant women. NO levels were detected by Greiss reaction method and genotyping following sequencing was conducted for eNOS gene variants. Further insilico studies were performed to get insights into the structural and functional impact of identifies mutation on eNOS protein as well as on protein regulation.

Results

Reduced concentrations of NO were reported in all PE groups (p < 0.05) as compared to controls. The frequency of c.894 T (p.298Asp) and g.-786C alleles were significantly associated with PE. In addition, novel homozygous variant g.2051G > A was also significantly associated with PE when compared to normotensive women. Dynamic simulation studies revealed that Glu298Asp mutation destabilize the protein molecule and decrease the overall stability of eNOS protein. Molecular docking analysis of mutant promoter with transcription factors STAT3 and STAT6 proposed changes in protein regulation upon these reported mutations in upstream region of the gene.

Conclusion

Considering the results of current study, the functional alterations induced by these variants may influence the bioavailability of NO and represents a genetic risk factor for increased susceptibility to PE. However, large studies or meta-analysis are necessary to validate these findings.
Appendix
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Metadata
Title
Association of endothelial nitric oxide synthase gene variants with preeclampsia
Authors
Ghazala Shaheen
Sarwat Jahan
Nousheen Bibi
Asmat Ullah
Rani Faryal
Ali Almajwal
Tayyaba Afsar
Dara Al-disi
Mahmoud Abulmeaty
Abdulaziz Abdullah Al Khuraif
Mohammed Arshad
Suhail Razak
Publication date
01-12-2021
Publisher
BioMed Central
Keyword
Pre-Eclampsia
Published in
Reproductive Health / Issue 1/2021
Electronic ISSN: 1742-4755
DOI
https://doi.org/10.1186/s12978-021-01213-9

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