ABSTRACT
Objective:To investigate the changes and to establish a reference interval of bile acid profile of healthy pregnant women in the second and third trimesters of pregnancy in our hospital.Methods:A total of 298 healthy singleton pregnant women who underwent prenatal examination in the Department of Obstetrics of Zhejiang Provincial People′s Hospital from July 2019 to August 2020 were enrolled in this study. The overnight fasting serum samples were collected from all subjects during their second and third trimesters of pregnancy. The concentrations of 15 bile acids(cholic acid, chenodeoxycholic acid, deoxycholic acid, ursodeoxycholic acid, lithocholic acid and their glycine-and taurine-conjugated types)were analyzed by liquid chromatography tandem mass spectrometry (LC-MS/MS). The characteristics of changes were analyzed and the reference intervals were determined for the second and third trimesters. The concentrations of 15 bile acids and total bile acids were skewed-distributed, and 99 percentiles (P 99) were used to represent the unilateral upper limit of the reference interval. Results:There was significant difference in the serum levels of glycine cholic acid (GCA), taurocholic acid (TCA), glycine ursodeoxycholic acid (GUDCA) and lithocholic acid (LCA) between the second and third trimesters healthy pregnant females ( P<0.05). For other 11 bile acids, there was no significant difference. The levels of total bile acids, primary or secondary bile acids, free or conjugated bile acids (glycine-bound and taurine-bound bile acids) were stable with gestation. Conclusion:Primary, secondary or free, and conjugated bile acids in healthy pregnant women remained stable at T 2 and T 3, with significant differences in only a few subtypes of bile acids. While the correlation between glycine-bound and taurine-bound bile acids showed a weakening trend at T 3 ( P<0.05). It is necessary to establish reference intervals of bile acids for healthy pregnant women in this area. This study provided data support for future research on related diseases during pregnancy.
ABSTRACT
OBJECTIVE To investigate the affinity of 20 Klebsiella pneumoniae(KPN)strains.METHODS Twenty nine genes were detected from 20 KPN strains.They were sixteen kinds of beta-lactamase genes,six kinds of aminoglycosides modification enzyme genes,chlorhexidine-sulphanilamide drug resistance genes,TMP drug resistance genes;three kinds of integrase genes and Tn21/Tn501 transposon genetic mark were detected.And they were used as molecule marker for the sample clustering analysis and assay of the detected results.RESULTS The beta-lactamase genes,aminoglycosides modification enzyme genes,chlorhexidine-sulphanilamide drug resistance gene,TMP drug resistance gene,integrase genes and Tn21/Tn501 transposon genetic mark were all detectable.Clone transmission was shown through the sample clustering analysis.CONCLUSIONS The resistance to the beta-lactam and aminoglycoside antibiotics of the 20 KPN strains is intimately correlated to the generation of beta-lactamases and amino glycosides modification enzymes,which could be clone transmitted.