1.Expression and its correlations of caudal type homeobox transcription factor-2, heparin-binding epidermal growth factor-like growth factor and bone morphogenetic protein-4 in Barrett's esophagus
Xin CHEN ; Anwei WEI ; Shu LI ; Kui JIANG ; Bangmao WANG
Chinese Journal of Digestion 2015;35(5):323-327
Objective To explore the function and significance of caudal type homeobox transcription factor-2 (CDX)-2,heparin-binding epidermal growth factor-like growth factor (HB-EGF) and bone morphogenetic protein 4 (BMP-4) of esophageal stromal tissues in the pathogenesis of Barrett's esophagus (BE).Methods A total of 116 patients were divided into groups according to gastroscopic finds and hematoxylin-eosin (H &E) staining of biopsy samples.They were divided into control group (n=29),RE group (n=32),BE group (n=35),RE treatment group (n=10) and BE treatment group (n=10).The expression of CDX 2,HB-EGF and BMP-4 in different esophageal mucosal lesions was detected by immunohistochemical staining and the changes of positive expression levels of CDX-2,HBEGF and BMP 4 were compared among groups.Variance analysis and chi-square analysis were performed to analyze the correlation among the three factors.Results The CDX-2 positive cell number of control group ((0.0±0.0)/high power field(HPF)),RE group ((43.1±10.6)/HPF),and BE group ((67.8±11.3)/HPF) increased in turn,and the differences among three groups were statistically significant (F=67.664,P<0.01).The HBEGF positive ((6.4±1.4)/HPF,(39.4±13.5)/HPF,(55.8±13.9)/HPF) and BMP 4 positive ((0.0±0.0)/HPF,(22.6±6.4)/HPF and ((25.1± 10.3)/HPF) cell number of three groups had the same trend and the differences among three groups were statistically significant (F HB-EGF =22.925,FBMP-4 =10.463,both P<0.01).Except the expression of BMP-4 between RE group and BE group,there were significant differences between every other two groups (LSD test,all P< 0.01).The expression of CDX 2,HB EGF,BMP-4 in RE treatment group ((21.7±1.7)/HPF,(16.6±5.0)/HPF and (9.2±1.0)/HPF) and BE treatment group ((51.4±8.7)/HPF,(31.0± 10.4)/HPF and (12.7±3.9)/HPF) were lower than those in RE group and BE group respectively,the differences were also statistically significant (LSD test,all P<0.05).In RE group,the positive rate of CDX-2 (31.2% (10/32)) was significantly lower than that of HBEGF and BMP4 (62.5% (20/32) and 56.2%(18/32)),and the differences were statistically significant (x2=6.275 and 4.063,both P<0.05).However in BE group,there was no statistically significant difference in the positive rate among CDX-2(85.7%(30/35)),HB-EGF (88.6%(31/35)) and BMP-4 (74.3%(26/35),all P>0.05).Conclusions CDX-2,HB-EGF and BMP-4 may play an important role in the pathogenesis of RE and BE.HB-EGF and BMP-4 may be involved in the early episodes of BE genesis and have promotion effects on CDX-2 expression.HB-EGF and BMP-4 may be the new target in the research and treatment of BE.
3.Evaluation of cystatin C with two kinds of detection systems
Hai-Xia LI ; Xue-Jing WANG ; Guo-Bin XU ; Shu-Kui LI ; Tie-An XIA ;
Chinese Journal of Laboratory Medicine 2003;0(11):-
Objective To evaluate the performance of Cys C results among two detection system.Methods The particle-enhanced immunonephrometic assay was used in Dade Behring BNII. Immunoturbic assay was used in Hitachi 7170 to evaluate the JING' YUAN reagents.We compared the precison,linearity,interference,correlation,and calibrators agreement with Dade Behring BNII.Results The total CV of the samples that contain 0.6-5.0 mg/L was less than 10%.The Dade Behring and JING'YUAN method showed good linearity.Haemoglobin(10 g/L),Bilirubin(300 mg/L), Vitamin C(5 g/L)in the tested sample had no significant interference in the assay(interference 0.05) between JING' YUAN and Dade Behring reagents.Values were slightly lower than that from the Dade Behring BNII method,the mean bias was-0.16.The bias range was 1.1%-23% between JING'YUAN and Dade Behring for one sample.Conclusions The precision,linearity and interference test were suitable for routine Cys C measurement on automated biochemistry analyzer,but results has bias.
4.Evaluation of the glomerular filtration function in type 2 diabetic patients
Yan KONG ; Jian-Mei YANG ; Guo-Bin XU ; Shu-Kui LI ; Chun-Li ZHANG ; Xiao-Hui GUO ;
Chinese Journal of Laboratory Medicine 2003;0(11):-
Objective To evaluate the value of serum creatinine(Scr),creatinine clearance (Ccr),MDRD equation 7(MDRD 7),~(99)Tc~m-DTPA renal dynamic imaging(gGFR)and cystatin C in screening changed glomerular filtration function in type 2 diabetic patients.Methods The ~(99)Tc~m-Diethylene Triamine Pentaacetic Acid(~(99)Tc~m-DTPA)plasma clearance(rGFR)obtained with the dual plasma sampling method was used as a reference with which Scr,Ccr,MDRD 7,gGFR and Cystatin C were compared.Results Sixty of type 2 diabetic patients were selected,including 35 male and 25 female.The average age was(62.4?11.7)years and the average diabetic history was(10.66?9.35)years.Scr,Ccr, MDRD 7,gGFR were all correlated significantly with rGFR.Correlation coefficients were 0.675 for Ccr, -0.588 for Cystatin C,-0.500 for Scr,O.428 for MDRD 7,0.367 for gGFR(P values all
5.Comparison of serum creatinine,Cystatin C and estimated glomerular filtration rate on evaluation of glomerular filtration function in chronic kidney disease patients
Xue-Jing WANG ; Guo-Bin XU ; Hai-Xia LI ; Shu-Kui LI ; Jin-Rong ZHAO ; Tie-An XIA ;
Chinese Journal of Laboratory Medicine 2001;0(04):-
Objective To compare the coherence of serum creatinine,creatinine clearance(Ccr), Cystatin C,and estimated glomerular filtration rate(eGFR)in each stage of chronic kidney disease(CKD) patients.Methods Creatinine in serum and urine were determined by Jaffe method;serum Cystatin C was measured by particle enhanced turbidimetric method,while eGFR was calculated using the abbreviated Modification of Diet in Renal Disease(MDRD)equation which was mainly based on the serum creatinine concentration.According to the American national kidney foundation-Kidney Disease Outcome Quality Initiative(NKF-K/DOQI)guideline,all cases were grouped by eGFR into 5 stages.Results In these 228 cases,as eGFR decreased gradually,the average levels of creatinine and Cystatin C increased,while Ccr decreased.The level of each items showed a statistic difference among each stage(P0.05);in eGFR 60-89 ml/min group,the average level of creatinine was 83.3 ?mol/L,the abnormal rate was only 6.8%,it was not a sensitive marker to detect the slightly damaged GFR,the levels of Ccr and Cystatin C showed a marginal decrease and increase,with an abnormal rates of 70% and 86%,there was a statistic difference among the three abnormal rates(P
6.Reference method applied to assigning values for calibrators in serum gamma-glutamyltransferase assays
Shu-Kui LI ; Zhen-Kun HE ; Guo-Bin XU ; Hai-Xia LI ; Tao WANG ; Wan-Chun DAN ;
Chinese Journal of Laboratory Medicine 2000;0(06):-
Objective To investigate the efficacy of using a calibrator with values assigned with the reference method for improving the comparability of serum gamma-glutamyltransferase (GGT) measurements.Methods The IFCC reference method for GGT was established and the performance was verified by testing a certified reference material (CRM).A calibrator was prepared and its value for GGT was assigned with the reference method.Forty serum samples were measured on different (including HITACHI 7600,7060,7170,7180 and BECKMAN LX20,OLYMPUS AU 400) chemistry analyzers with Zhongsheng GGT reagent kits calibrated with the calibrator.The samples were also measured on the same analyzers using a theoretical factor.Biases of results obtained with the calibration and with the theoretical factor based calculation were compared.Results The reference method resuhs on the CRM agreed the certified value within the stated uncertainty.Serum results calculated from the theoretical factor showed various biases and inter-analyzer variations.When the analyzers were calibrated with the calibrator,the number of results with biases less than 10% became significantly higher and those with biases more than 20% significantly lower.The variation of the results on 5 serum samples was reduced from 11.0%~14.0% to less than 5% by using the calibrator.Conclusion Accuracy and comparability of GGT measurements with of ZhongSheng GGT kits can be improved by using a calibrator that has a value assigned with the reference method.
8.The correlation of HBeAg expression and HBV-DNA in serum or peripheral blood mononuclear cells in patients with chronic hepatitis B.
Yu-Qiang MI ; Shu-Ren LIANG ; Hong ZHANG ; Shu-Wen ZHENG ; Shun-Tian LI ; Wu-Kui CAO
Chinese Journal of Experimental and Clinical Virology 2007;21(3):261-263
OBJECTIVETo study the relationship between HBeAg expression and HBV-DNA in serum and peripheral blood mononuclear cells (PBMCs).
METHODS208 patients with chronic hepatitis B were included in this present study. HBV-DNA in the PBMCs were performed by polymerase chain reaction (PCR), with the serum HBV-DNA level being determined by the way of fluoresces quantities PCR (FQ-PCR). Meanwhile, HBV-GM was also detected via enzyme-linked immunosorbent assay (ELISA).
RESULTSThere were 106 patients for positivity in the HBV-DNA level of PBMCs with 102 for negativity, in which the HBV-DNA high levels (HBV DNA load > or = 1.0E5) in serum were 91.5%, 45.1% (chi2=52.12, P>0.01) respectively, with 76.4% and 50.9% (chi2=21.55, P>0.01) for the positive percentage of HBeAg expression.
CONCLUSIONA significantly positive correlation was found between HBV-DNA in PBMCs and serum HBV-DNA along with the positive percentage of HBeAg, indicating that obvious PBMCs' increase infected by HBV in patients with positivity of HBeAg and high level of serum HBV-DNA.
Adolescent ; Adult ; Aged ; Antibodies, Viral ; blood ; DNA, Viral ; blood ; genetics ; Enzyme-Linked Immunosorbent Assay ; Female ; Hepatitis B ; genetics ; immunology ; Hepatitis B e Antigens ; immunology ; Hepatitis B, Chronic ; blood ; virology ; Humans ; Leukocytes, Mononuclear ; virology ; Male ; Middle Aged ; Reverse Transcriptase Polymerase Chain Reaction ; methods ; Young Adult
9.Construction of the recombinant varicella zoster virus carrying 3xflag gene
Ke ZHANG ; Li-Xin WANG ; Kui YU ; Fang ZHANG ; Ji LI ; Ai-Hua LIU ; Shu-Ying LI
Journal of Xi'an Jiaotong University(Medical Sciences) 2018;39(4):584-588
Objective To construct the recombinant varicella zoster virus (VZV)carrying 3xflag gene,3xflag was added to the VZV open reading frame 7 (ORF7)using GalK-based homologous recombination.Methods GalK and 3xflag gene fragments with 50 bp VZV ORF7 homologous arms were amplified by PCR.The obtained fragments were purified and transferred to the competent cells of VZV bacterial artificial chromosome (SW102-VZVWTBAC). The clones of VZV ORF7 with 3xflag (SW102-VZV ORF7-3xflag-BAC)were obtained by homologous recombination and selection from medium containing GalK and replaced GalK. The recombinant plasmids were extracted and transfected into ARPE-19 cells.The effect of VZV ORF7-3xflag on ARPE-19 cells was observed.Results The clones of VZV ORF7 with 3xflag (SW102-VZV ORF7-3xflag-BAC)were obtained.The virus patches with green fluorescence were observed three days after SW102-VZVWTBAC and SW102-VZV ORF7-3xflag-BAC were transfected into ARPE-19 cells.Western blot showed that ORF7 expression was effectively enhanced with 3xflag.Conclusion The recombinant VZV carrying 3xflag gene was obtained,which suggests that GalK-based homologous recombination is convenient,efficient and accurate in manipulating the gene virus of interest.
10.The three-dimensional nonlinear finite element analysis of force system of the "rocking-chair archwire".
Li CHEN ; Ding ZHANG ; Min-kui FU ; Shu-li SUN ; Ying LIANG
Chinese Journal of Stomatology 2004;39(3):239-241
OBJECTIVEThe purpose of this study was to qualitatively and quantitatively analyze the initial force system of "rocking-chair archwire" on every tooth.
METHODSThree-dimensional finite element model of "rocking-chair archwire" was set up, and nonlinear method was used to analyze the force system.
RESULTSThe archwire exerted intruding force, labial force, lingual-root torque and mesial-labial moment on incisors; Extruding force, lingual-root torque and mesial-labial moment were applied on canines and premolars; The archwire also created intruding force, buccal force, buccal-root torque and mesial-labial moment on molars.
CONCLUSIONS"rocking-chair archwire" produced a complicated force system. While intruding incisors, molars and extruding premolars. It has a tendency to induce tooth rotation and tipping.
Dental Stress Analysis ; Finite Element Analysis ; Humans ; Malocclusion ; therapy ; Orthodontic Appliance Design ; Orthodontic Wires ; Orthodontics, Corrective ; methods