1.Alarm failure and its countermeasure when measuring high-concentration enzyme by biochemical analyzer
Chinese Medical Equipment Journal 1989;0(02):-
Modern fully automatic biochemical analyzer makes enzyme measurement accurate, specific and practical, but alarm failure happens sometimes and thus determinate error appears. To find out the inducement to alarm failure, Olympus AU2700 and ADVIA 1650 fully automatic biochemical analyzer are used to measure the serum liver enzyme from 450 cases of post-liver-transplantation patients.
2.Detection of peripheral blood T lymphocyte subpopulations among patients positive for both hepatitis B virus surface antigen and surface antibody
Dan CHEN ; Qiu-bo WANG ; Dan-dan SHEN
China Tropical Medicine 2022;22(12):1130-
Abstract: Objective To investigate the frequency of peripheral blood T cells among patients positive for both hepatitis B virus surface antigen (HBsAg) and surface antibody (HBsAb). Methods Thirty six patients with co-existence of HBsAg and HBsAb diagnosed were enrolled as the experimental group, who were admitted by Shanghai tenth people's hospital and Wuxi 9th people's hospital from 2014 to 2020. while 40 patients tested positive for HBsAg and negative for HBsAb served as controls, who were admitted by Wuxi 9th people's hospital. Flow cytometry was used to detect and compare the proportions of peripheral blood CD3+, CD4+ and CD8+ T cells between the experimental and control groups. In addition, the associations of serum HBsAb level with peripheral blood T cell proportions, serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels were examined among chronic hepatitis B patients with co-existence of HBsAg and HBsAb using Pearson correlation analysis. Results The median age, gender distribution, mean ALT and AST concentrations, proportion of HBV DNA viral load>103 copies/mL, seroprevalence of HBV E antigen (HBeAg), seroprevalence of HBV E antibody (HBeAb), seroprevalence of HBV core antibody (HBcAb) were comparable between the experimental and control groups, and there were no significant difference in them (P>0.05). There were no significant difference between the experimental and control groups in terms of CD3+ T cell proportion [(71.83±1.50)% vs (72.75±1.47)%; t=0.66, P>0.05], CD4+ T cell proportion [(36.81±1.53)% vs (39.88±1.57)%; t=1.43, P>0.05] and CD8+ T cell proportion [(33.17±2.04)% vs (32.40±1.75)%; t=0.77, P>0.05]. Pearson correlation analysis revealed that the serum HBsAb level did not significantly correlate with peripheral blood CD3+ (r=0.026, P=0.65), CD4+ (r=‒0.08, P=0.16) and CD8+ T cell proportions (r=0.09, P=0.24), CD4+/CD8+ T proportion (r=‒0.005, P=0.35), serum ALT (r=0.04, P=0.56) and AST levels (r=0.002, P=0.69) among chronic hepatitis B patients with co-existence of HBsAg and HBsAb. Conclusions There are no significant differences between HBsAg+/HBsAb+ and HBsAg+/HBsAb- CHB patients in terms of peripheral blood CD3+, CD4+ and CD8+ T cell proportions.
3.Disordered Eating Attitudes and Behaviors and Related Mood States among Female University Students in Beijing
Dan-Dan FU ; Jian-Ping WANG ; Wei CHEN ; Al ET ;
Chinese Mental Health Journal 2002;0(08):-
Objective:To investigate the eating disorder and mood among students of a female university in Beijing.Methods:352 female students from a same-sex college in Beijing,between the age of 17-25 years were in- vestigated by Eating Disorder Inventory(EDI)and Profile of Mood States-Short Form(POMS-SF).Their weight and height were also collected for calculating for their body mass index(BMI).Results:Female university students showed serious tendency of eating disorder.The negative attitudes to body and body satisfaction were serious among normal BMI female university students.The behaviors and attitudes to eating disorders among the students of fresh-woman and senior were significantly higher than other grades(x~2=17.94,P
6.Development of heliox-recirculating respirator based on ADuC848
Yanan CHEN ; Dan ZHOU ; Weidong WANG
Chinese Medical Equipment Journal 1989;0(03):-
From the treatment of respiratory failure, the method of breathing heliox is presented. This paper introduces the heliox-recirculating respirator based on ADuC848 which realizes PID control of heliox output through the measurements of the pressure in gas path, oxygen concentration, temperature and so on. The electronic measurement & control unit is described in detail.
7.Retroperitoneal laparoscopic Anderson-Hynes pyeloplasty (report of 6 cases)
Shuo WANG ; Dan XIA ; Geming CHEN
Chinese Journal of Urology 2001;0(08):-
Objective To evaluate retroperitoneal laparoscopic Anderson-Hynes pyeloplasty. Methods 6 patients underwent laparoscopic and 10 patients underwent open Anderson-Hynes pyeloplasty.The clinic outcome including subjective and objective findings was compared between the two groups. Results All the procedures were successfully completed.The mean operating time was 279 minutes for laparoscopic pyeloplasty being much longer than the open procedure 121 minutes(P0.05).No severe postoperative complications were found.3 months after the procedure,the pain-free rate was about the same between the two groups.However the open surgery group had much pain and prolonged convalescence due to the flank incision. Conclusions Laparoscopic pyeloplasty is a minimally invasive technique that provides similar clinical and radiographic results as open pyeloplasty.
8.DNA — anti — DNA IMMUNE COMPLEXES ENHANCE IL— 6 PRODUCTION BY MOUSE MESANQIAL CELLS
Yongxiong CHEN ; Dan WANG ; Rengao YE
Chinese Journal of Nephrology 1994;0(04):-
Using the IL—6 dependent hybridoma cell line KD83, we investigated the relationship between KNA—anti—DNA immune complexes(DNA—anti—DNAICs)from the sera of lupus nephritis patients and interleukin 6 (IL—6) production by mouse glomerular mesangial cells cultured in vitro. The results show that DNA—anti—DNA IgM and DNA—anti—DNA IgG and DNA—anti—DNA IgM all enhance IL—6 production by mesangial cells; of those DNA—anti—DNA IC, the effect of DNA—anti—DNA IgM on IL—6 production by mesangial cells was significant. This enhanced production of IL—6 by mesangial cells was dependent on concentration of DAN—anti—DNA ICs.
9.Preparation and Properties of Oxymatrine Pellets
Yang CHEN ; Baohua WANG ; Dan WU
China Pharmacy 2007;0(33):-
OBJECTIVE:To prepare oxymatrine pellets and study the pellets' properties.METHODS:Oxymatrine pellets were prepared using an experimental low-temperature extrusion-spheronization granulator.L9(34)orthogonal design was used to obtain optimal formulation.The micromeritic properties and in vitro dissolution of the pellets at different dosage were determined.RESULTS:Oxymatrine pellets prepared by extrusion-spheronization were round and smooth and well-distributed.The optimal technical conditions were as follows:water∶MCC=0.90∶1;spheronization velocity=35 Hz;spheroniza-tion time=5 min;extrusion velocity=40 Hz.The in vitro dissolution was more than 75% within 30 minutes.CONCLUSION:The process of preparing pellets by extrusion-spheronization was simple and feasible and the quality of pellets was excellent.
10.Effects of eicosapentaenoic acid on the growth of human cholangiocarcinoma cell lines FRH-0201
Xiangqun WANG ; Dan WU ; Lijuan CHEN
Chinese Journal of Hepatobiliary Surgery 2012;18(4):302-304
Objective To evaluate the effect of eicosapentaenoic acid (EPA) on the inhibition of proliferation and the induction of apoptosis of human cholangiocarcinoma cell lines FRH-0201.Methods Exponentially growing human cholangiocarcinoma cell lines FRH-0201 were exposed to EPA in vitro and cell growth was assessed by methylthiazolyl tetrazolium assay (MTT) assay,agarose gel electrophoresis and flow cytometry.Results After adding EPA,the proliferation of FRH-0201 cells were inhibited in a dose-dependent manner while apoptosis was induced.Flow cytometry detected apoptosis peaks and we found that superoxide dismutase (SOD) activity reduced significantly (P<0.05,respectively; P<0.001) while malondialdehyde (MDA) rose significantly (P < 0.01,respectively; P<0.001) after adding EPA with differing concentrations to human cholangiocarcinoma cell lines FRH-0201.Conclusions EPA can induce apoptosis of FRH-0201 cells in vitro and inhibit proliferation,possibly through increasing the lipid peroxidation.