Circulatory Maternal Endothelin 1 and Matrix Metalloproteinase-9 Gene Expression in PREECLAMPSIA: A Study in Western Uttar Pradesh, India.

Introduction: Preeclampsia (PE) is a multiorgan disease of pregnant women. The main pathophysiology of PE is a trophoblastic invasion into maternal circulation leading to alterations in circulatory levels of matrix metalloproteinases (MMPs), inflammatory markers, and endothelin 1(ET1) levels. Therefore, the present study has explored the role of MMP-9 and ET1 and their association in PE. The advantage of the study is to provide insight into the pathology of PE. These markers may help in the early diagnosis and prognosis of PE.

Objective: To investigate MMP-9 gene expression, ET1 level in PE cases and their correlation with blood pressure (BP), gestational age, weight, and height.

Methods: The study design was a case-control observational study, which included 70 subjects in each case (PE) and controls (normal pregnant women (NPW)). Whole blood (250 ul) was utilized for RNA extraction (Trizol method) and synthesized cDNA as per manufacturer protocol. MMP-9 gene expression was analyzed by real-time PCR. Serum was utilized for ET1 estimation by sandwich ELISA.

Results: The ET1 levels and MMP-9 gene expression were significantly increased in preeclamptic women as compared to controls. There was no significant correlation between MMP-9 gene expression and serum ET1 levels. However, a significant moderate association between systolic BP and diastolic BP with ET1 levels and MMP9 gene expression was seen in both PE and NPW.

Conclusion: A significantly increased circulatory concentration of ET1 and MMP-9 gene expression in PE might be used as an early diagnostic as well as a prognostic marker of PE.