Evaluating pentraxin-3 and hypersensitivity CRP expression in obese pregnancies

This study was designed to evaluate the correlation between serum pentraxin-3 (PTX3)/hypersensitivity CRP (hs-CRP) expression and obesity during pregnancy and their application as inflammatory biomarkers in obese pregnant women.

Pregnant women scheduled to experience a single-birth at our hospital between 2016 and 2017 were selected for this nested case-control study. These patients were evaluated for age and gestational age in the first trimester (11-14 weeks), had their body mass index (BMI) calculated and were subjected to an OGTT between Week 24 and 28 of pregnancy. Obese patients with normal OGTT and a BMI of ≥30 kg/m² in the second trimester were selected as the obese group (OBE, n = 80), and non-obese pregnant women with normal OGTT with a BMI of <30 kg/m² were selected as the control group (CON, n = 80). ELISA was used to detect the expression of PTX3 and hs-CRP.

The expression of both PTX3 and hs-CRP increased in both groups, with increasing gestational age (P < 0.05). However, hs-CRP level in Group OBE was increased, compared to that in the healthy control (P < 0.01), during the second trimester. PTX3 expression was also significantly higher in OBE samples than in the control (P < 0.05), during the third trimester; correlation analysis demonstrated that PTX3 was positively correlated with hs-CRP, BMI, fasting plasma glucose and HOMA-IR.

The expression levels of both PTX3 and hs-CRP increased with increasing gestational age, and PTX3 expression was related to BMI, which serves to confirm the inflammatory response in these patients.