Abstract:Objective To analyze the expressions of miR-122 and vascular endothelial growth factor (VEGF) in serum of patients with gestational diabetes mellitus (GDM) and their relationship with perinatal outcome.Methods A total of 80 patients with GDM admitted from May 2018 to January 2020 in the Department of Obstetrics and Gynecology of the Affiliated Hospital of North Sichuan Medical College were selected as the study group. In addition, 70 healthy pregnant women receiving the antenatal care in the hospital during the same period were included as the control group. The levels of blood glucose, miR-122 and VEGF were compared between the two groups, and the correlation between the levels of blood glucose and those of miR-122 and VEGF was analyzed. The levels of miR-122 and VEGF were also compared between patients with different perinatal outcomes, and the value of miR-122 and VEGF in predicting perinatal outcomes was determined by receiver operating characteristic (ROC) curve analysis.Results The levels of blood glucose, miR-122 and VEGF were higher in the study group than those in the control group (P < 0.05), and the levels of miR-122 and VEGF in patients with poor perinatal outcomes were higher compared with those with favorable perinatal outcomes (P < 0.05). Pearson correlation analysis showed that the levels of miR-122 (r = 0.605, 0.752 and 0.542, all P <0.05) and VEGF (r =0.532, 0.623 and 0.596, all P <0.05) were positively correlated with FGB, 2 hPG and HbA1c. As demonstrated in the ROC curve analysis, the area under the ROC curve (AUC) of miR-122, VEGF and the combination of the two indicators for predicting adverse perinatal outcomes in GDM patients were 0.787 (95% CI: 0.687, 0.887), 0.755 (95% CI: 0.658, 0.851), and 0.842 (95% CI: 0.760, 0.923), respectively.Conclusions Serum miR-122 and VEGF are dysregulated in GDM patients and they are positively correlated with the level of blood glucose. The combined detection of serum miR-122 and VEGF can effectively predict the occurrence of adverse perinatal outcomes.