Influence of choleretic therapy on the microRNA-4714-3p expression level in children with functional disorders of the gallbladder and Оddi's sphincter.

The high prevalence and possibility of transformation of functional disorders into organic pathology determine the relevance of the study of the cluster of functional disorders of the gallbladder and Oddi's sphincter (FD GB and OS) in children. Studies on the properties of ursodeoxycholic acid (UDCA) to alter the activity of generation of some microRNAs in various diseases of the hepatobiliary system have become important in view of the evidential impact on this process. The alm: to determine the effect of choleretic therapy with UDCA drugs addition on the microRNA-4714-3p expression level in functional disorders of the gallbladder and Oddi's sphincter in children. 70 children with FD GB and OS aged 4 to 14 years were examined. Main group included 50 children. They received standard therapy with UDCA combination. The comparison group included 20 patients receiving standard therapy without UDCA. A molecular genetic study was conducted to determine the microRNA-4714-3p expression level in serum before and after treatment by real-time polymerase chain reaction with reverse transcription according to TaqMan Gene Expression Assays. The correlation was established between the main anamnestic data, causative factors of development, clinical and paraclinical parameters of the FD GB and OS and the microRNA-4714-3p expression level in blood serum of children before therapy. The positive relationship of the microRNA-4714-3p expression profile with decrease in gallbladder contractility was determined (r=+0.36; p<0.05). It has been determined that in children with FD GB and OS after the combined therapy with UDCA, the mean value of the microRNA-4714-3p expression level in serum is significantly lower than before therapy (1.93±0.58 SU and 5.56±1.50 SU, respectively). A positive correlation was found between the microRNA-4714-3p expression level and the alkaline phosphatase activity level in the blood of children with FD GB and OS after therapy with UDCA addition (r=+0.33; p<0.05). There was no correlation between the microRNA-4714-3p expression level and the anamnestic, clinical-paraclinical parameters in children with FD GB and OS after treatment without UDCA. The effect of UDCA on the treatment of functional disorders of the gallbladder and Oddi's sphincter in children results in a decrease in the microRNA-4714-3p expression profile and is accompanied by the emergence of a direct correlation between low level of a microRNA-4714-3p expression and reduced alkaline phosphatase activity in serum