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 relationship between the polymorphism of cytochrome P450 19 (CYP19) gene rs10046 and the risk of colon and rectal cancer.Methods Using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) to analyze gene polymorphism in CYP 19 gene rs10046 in 198 cases of colon and rectal cancer patients (case group) and 309 cases of healthy controls (control group).The genotype frequency and relative risk of CYP19 gene rs10046 between the two groups were compared and the relationship with the clinicopathological features of colorectal cancer was analyzed.Results In case group,the prevalence rates of CYP19 rs10046 genotypes C/C,C/T and T/T were 28.3％,44.4％ and 27.3％,respectively,and 17.2％,51.8％ and 31.1％ in the control group,respectively,with statistical significant difference (P ＜ 0.05).Compared with wild-type C/C,the susceptibility of colorectal cancer with the genotypes of C/T and T/T was decreased by 0.521 (95％ CI:0.330-0.822)and 0.532 (95 ％ CI:0.322-0.880) respectively.Moveover,in the non-smoking group,the risk of colorectal cancer with genotype T/T or C/T was decreased by 0.409 (95％ CI:0.210-0.798) compared with genotype C/C.The interaction was not exist in smoking group.Conclusions The polymorphism of CYP19 gene rs10046 is related to the susceptibility of colon and rectal cancer.The T/T,C/T genotype of CYP19 rs10046 decrease the risk of colon and rectal cancer,and which might be the protective factor of colon and rectal cancer.