Objective To establish a sensitive and specific LC-MS/MS method for measurement of notoginsenoside R1, ginsenoside Rg1, ginsenoside Re, ginsenoside Rb1, ginsenoside Rd, tanshinone Ⅰ, astragaloside Ⅳ and harpagosidein of Fufang Xueshuantong Capsule in rat plasma. Methods The HPLC separation was performed on Thermo Hypersil GOLD column (2.1 mm× 100mm, 5 μm) at 30 ℃, injecting 10 μL and using acetonitrile-water (0.1% formic acid) as the mobile phrase (B was acetonitrile, A was 0.1%formic acid;0-10 min, 25%-55%B;10-20 min, 55%-70%B) with the flow rate of 0.2 mL/min. Detection was performed on a tandem quadrapole mass spectrometer using positive electrospray ionization, SRM scan mode. Results The eight compounds showed good linearity in wide ranges (notoginsenoside R1 1.00-800 ng/mL, ginsenoside Rg1 0.950-760 ng/mL, ginsenoside Re 1.44-1440 ng/mL, ginsenoside Rb1 1.33-1330 ng/mL, ginsenoside Rd 9.90-990 ng/mL, harpagosidein 1.01-1010 ng/mL, astragaloside Ⅳ 1.16-928 ng/mL, tanshinone Ⅰ 10.0-800 ng/mL). In addition, the accuracy and recovery were around 85%-115%and 50%-70%. The RSD of intra and inter day precision were lower than 15%. Conclusion The method is specific, rapid and sensitive. Therefore, it can be applied to pharmacokinetic study of eight effective compounds in Fufang Xueshuantong Capsule.

Objective:To construct the pregnancy risk prediction model of chronic kidney disease (CKD) pregnant women by analyzing their renal function and pregnancy outcome in the first trimester.Method:Totally 313 CKD women with 322 pregnancies who had deliveries in Peking University First Hospital from March 2009 to December 2018 were retrospectively analyzed. The history of kidney disease and renal function in the first trimester were collected, and the relationship between CKD and premature delivery, low birth weight infants, severe preeclampsia and fetal loss were analyzed.Result:Among 322 pregnancies with CKD, 120 (37.3%, 120/322) had adverse pregnancy outcomes. CKD stage, serum creatinine, urea, albumin, hemoglobin, 24-hour urine protein quantity and whether complicated with hypertension were independent predictors of adverse pregnancy outcome. A prediction model logit (P)=2.107+0.255×24-hour urine protein quantitative (g/24-hour)-0.107×albumin (g/L)+1.677×whether complicated with hypertension (1 or 0)+ 0.639×CKD stage was established. The area under curve value of the model was 0.812, the best threshold, sensitivity, specificity and Yoden index were 0.436, 0.658, 0.856 and 0.802, respectively.Conclusion:CKD stage, serum albumin, 24-hour urine protein quantity in the first trimester and hypertension are the main risk factors of adverse pregnancy outcome, which could predict the occurrence of adverse pregnancy outcome of CKD pregnant women and deserve further study.

Objectives To investigate the sanitary condition of the secondary water supply for passenger trains in the administration area, to evaluate the influencing factors of the secondary water supply system for passenger trains, and to put forward suggestions for improving the water quality of the secondary water supply for passenger trains. Methods The water quality of secondary water supply of 48 trains of 24 pairs of CRH type passenger trains and 160 trains of 10 pairs of type 22 passenger trains and 30 pairs of type 25 passenger trains in Lanzhou Railway Bureau in 2019 was analyzed and compared. Results The qualification rate of 208 samples tested was 73.08%. The qualification rate of secondary water supply quality of type 22 and 25 passenger trains was 62.50% and 66.67%, respectively, and the difference was not statistically significant（χ²=0.23 ，P＞0.05）. The qualification rate of secondary water supply of CRH passenger train was 97.92%, which was statistically significantly different compared with that of type 22 and 25 passenger trains（χ²=18.40, 18.15, P<0.05). The qualification rate of secondary water supply quality of type 22 and 25 passenger trains in different seats was 65.00%, 67.50%, 62.50% and 67.50%, respectively, and the difference was not statistically significant (χ²=0.056, 0.054, 0.056, 0.22, 0, and 0.22, P>0.05). The total number of bacterial colonies, total coliform, turbidity and iron in the secondary water supply of type 22 and 25 passenger trains did not meet the standard, while only one water sample for the secondary water supply of CRH passenger trains did not meet the standard. Conclusion The quality of secondary water supply of CRH passenger train is obviously better than that of type 22 and 25 passenger trains. Changing the position of defecation port and water injection pipe of type 22 and 25 passenger trains, selecting non direct train defecation collection system, or adding appropriate amount of chlorine disinfectant into the water supply hose can significantly improve the qualification rate of bacteriological indexes of secondary water supply of passenger trains.

OBJECTIVE: To investigate the effects of ALKBH5 on migration, invasion and epithelial-mesenchymal transition (EMT) of human trophoblast cells. METHODS: The expression plasmid of ALKBH5 or a negative control plasmid (ALKBH5-NC) was transfected in human trophoblast HTR-8 /SVneo cells, and the expressions of ALKBH5 mRNA and protein were detected by qRT-PCR and Western blotting. Transwell assay was used to assess the changes in migration and invasion abilities of the trophoblast cells after the transfection. Western blotting was performed to detect the expressions of EMT-related proteins in the cells including vimentin, fibronectin, E-cadherin, N-cadherin, MMP9 and MMP2. RESULTS: ALKBH5 mRNA and protein expressions were significantly higher in ALKBH5 group than in the control group ( CONCLUSIONS ALKBH5 is involved in the pathogenesis of preeclampsia by inhibiting EMT of trophoblast cells and hence reducing their migration and invasion abilities.
AlkB Homolog 5, RNA Demethylase ; Cell Line, Tumor ; Cell Movement ; Epithelial-Mesenchymal Transition ; Female ; Humans ; Pre-Eclampsia ; Pregnancy ; Trophoblasts ; Vimentin/genetics*