• Ahter Tanay Tayyar, Ahmet Tayyar, Sukran Kozali, Resul Karakus, Nadiye Koroglu, Ilkbal Temel Yuksel, Gonca Yetkin Yildirim, Ismail Dag, and Mustafa Eroglu.
• Department of Obstetrics and Gynecology, Health Sciences University Zeynep Kamil Maternity and Children's Research Hospital, Istanbul, Turkey.
• Arch Med Sci. 2019 Jan 1; 15 (1): 113-119.

IntroductionFibroblast growth factor-19 (FGF-19) and its co-receptor, beta-klotho, regulate bile acid synthesis in the liver as an enterohepatic feedback mechanism. In this study, our aim was to investigate the circulating FGF-19 and β-klotho levels in intrahepatic cholestasis of pregnancy (ICP) cases.Material And MethodsA cross-sectional study including 40 women whose pregnancies were complicated with ICP were recruited for the study group. Forty randomly selected healthy pregnant women comprised the control group. The patient characteristics, including maternal age, gravidity, parity, gestational age at the time of diagnosis, body mass index (BMI), and obstetric history, were recorded. The serum FGF-19 and β-klotho concentrations were measured using an enzyme-linked immunosorbent assay.ResultsMaternal age, gravidity, parity, body mass index at assessment, and gestational age at blood sampling were similar between the two groups (p > 0.05). Moreover, there were no significant differences in the FGF-19 and β-klotho concentrations between the two groups (p = 0.341 and p = 0.086, respectively). A positive correlation was detected between the β-klotho and FGF-19 levels, as well as between the FGF-19 level and BMI (r = 0.368, p = 0.020 and r = 0.389, p = 0.013, respectively).ConclusionsThe serum FGF-19 and β-klotho concentrations did not differ between the pregnancies with ICP and the healthy controls. However, in some cases, abnormalities in the FGF-19, β-klotho, and FGFR4 signaling system may play roles in the pathogenesis of ICP.

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