The Relationship between Serum Neuropeptide FFR2, Serum Smoothelin and Pregnancy Outcomes in Pregnant Women with Gestational Hypertension

Objective: Gestational hypetension is a major public health concern due to its links with cardiovascular disease, stroke and neonatal morbidity and mortality. Timely diagnosis and effective management of gestational hypertension are essential for both maternal and neonatal health. Neuropeptide FF Receptor 2 (NPFFR2) is a protein secreted by the brain and placenta, involved in pain regulation, water balance, and the modulation of cardiovascular effects. This study aims to conduct a comparative analysis of NPFFR2, smoothelin (SMTH), echocardiographic results and pregnancy outcomes in pregnant women with and without gestational hypertension. Method: This study included 78 pregnant participants, which were grouped into women with gestational hypertension (n = 39) and those without gestational hypetension (n = 39). The gestational hypertension population was classified into two groups, i.e., dipper and non-dipper groups, based on the 24-hour ambulatory blood pressure monitoring results. Smoothelin and NPFFR2 analyses were performed using the blood samples and placental tissue samples collected from all participants, along with echocardiography and 24-hour ambulatory blood pressure monitoring. Results: The study group comprised 78 pregnant women with a mean age of 28.8 years and mean gestational age of 27.7 weeks. The gestational hypertension group had a significantly higher NPFFR2 levels, lower SMTH levels and gestational age at birth and higher all 24-hour ambulatory blood pressure monitoring findings. The left atrial-to-aortic ratio and Tricuspid annular plane systolic excursion (TAPSE) were significantly higher in G & Idot;H group than in the control group. NPFFR2 and gestational age at birth were found to be independently associated with neonatal intensive care unit admission. Conclusion: Serum NPFFR2 levels were increased in women with gestational hypertension, SMTH levels were decreased, and pregnancy prognosis was found to be associated with NPFFR2 levels.