Objective To detect the expression of Survivin ,PTEN and to discuss the correlations between them and the clinico-pathological characteristic of rectal carcinoma ,evaluate their effects on the development of rectal carcinoma .Methods SP immuno-histochemical was used to detect the expression level of Survivin and PTEN in 72 rectal carcinoma samples ,and randomly selected 20 cases of normal paraneoplastic tissues as control group .Results The positive rate of Survivin and PTEN in normal paraneoplas-tic tissues were 0 and 85 .0% respectively ;The positive rate in rectal carcinoma samples were 61 .1% and 41 .7% respectively .Posi-tive expressions of Survivin and PTEN did not had no correlation with gender ,age ,but correlated with differentiation ,dukes staging and lymph node metastasis .PTEN expression was negatively correlated with Survivin expression in rectal carcinoma .Conclusion The low expression of Survivin and high expression of PTEN might promote tumor genesis and progression of rectal carcinoma , which could be used to judge the rectal cancer clinical staging and pathologic grading .

Objective To investigate the proportion of CD4+CD25highTreg and CD4+CD25+CD127low/-Treg in peripheral blood in patients with chronic hepatitis B(CHB) and determine the relationship between the proportion of CD4+CD25+Treg and clinical parameters.Methods Fresh isolated peripheral blood mononuclear cells(PBMCs) of 28 patients with CHB and 24 healthy donors were analyzed for the proportion of CD4+CD25+Treg using flow cytometry by surface staining for CD4-PC5,CD25-FITC,CD127-PE.HBsAg,HBsAb,HBeAg,HBeAb and HBcAb were evaluated.HBV DNA levels were measured using real-time RT-PCR.Results The proportions of CD4+CD25highTreg to CD4+ T cells(3.36%?2.59%) and CD4+CD25+CD127low/-Treg(4.05%?1.63%) to CD4+ T cells in patients with CHB were higher than those in health controls(1.60%?0.66%,1.75%?0.83%,P100U?L-1) had a higher fraction(4.26%?3.10%) of CD4+CD25highTreg in peripheral blood than those patients with low level ALT(ALT

ObjectiveTo investigate the role of T helper (Th) 22 and Th17 cells in the pathogenesis of severe preeclampsia.MethodsThirty women with severe preeclampsia who delivered in the Third Affiliated Hospital of Zhengzhou University from October 2014 to February 2016 were enrolled in the study. Thirty healthy pregnant women matched for age and gestational weeks were recruited as the control group. The frequencies of Th22 and Th17 cells in peripheral whole blood were determined by flow cytometry. The concentrations of interleukin (IL)-22 and IL-17A in plasma were detected by enzyme-linked immunosorbent assay. Independent two samplest-test, non-parametric test and Spearman correlation analysis were used for statistical analysis.ResultsThe percentage of Th22 and Th17 cells in the severe preeclampsia group were significantly higher than those in the control group, respectively[Th22 cells: 0.59% (0.39%-1.13%) vs 0.40%(0.23%-0.57%),Z=2.530,P=0.010; Th17 cells: 3.24% (3.02%-3.97%) vs 1.87% (1.53%-2.64%),Z=5.046, P=0.000]. So were the plasma levels of IL-22 and IL-17A[IL-22: 285.72 (247.63-306.69) vs 233.85 (184.92-258.38) pg/ml,Z=4.341,P=0.001; IL-17A: 27.53 (23.84-32.78) vs 17.36 (15.58-19.13) pg/ml,Z=4.924, P=0.000]. There was a positive correlation between circulating Th22 and Th17 cells in the severe preeclampsia group (r=0.534,P=0.015), while no correlation was found in the control group (r=0.345,P=0.136). Positive correlation was found in plasma level of IL-22 with Th22 cells (r=0.600,P=0.005), but not with Th17 cells (r=0.398,P=0.082) in the severe preeclampsia group.ConclusionsIncreased Th22 cells and high IL-22 concentrations in the peripheral blood of severe preeclampsia patients may indicate a self-defense mechanism in the maternal body. Th22 cells and Th17 cells may interact with each other.

OBJECTIVE:To systematically review the effect of CYP2C19 genetic polymorphism on lansoprazole pharmacoki-netics,and provide evidence-based reference for clinical individualized medication of lansoprazole. METHODS:Retrieved from PubMed,EMBase,Web of science,Cochrane Library and CJFD,retrospective studies about the effect of CYP2C19 genetic poly-morphism on lansoprazole pharmacokinetics were collected,Meta-analysis was performed by Rev Man 5.2 software after data ex-tract and quality evaluation. RESULTS:Totally 11 retrospective studies were included,involving 200 patients. The gene type in-cluded homozygote express metabolizers (EM),heterozygous express metabolizers (HEM) and slow metabolizers (PM). Results of Meta-analysis showed CYP2C19 polymorphism significantly affected cmax,AUC,t1/2,tmax and CL/F. The cmax and AUC in group PM were higher than group HEM and group EM;CL/F in group EM was higher than group HEM and group PM;t1/2 in group PM was higher than group HEM and group EM,while there was no significant difference in the t1/2 between group HEM and group EM;tmax in HEM and group PM were higher than group EM,while there was no significant difference in the tmax between group PM and group HEM. CONCLUSIONS:CYP2C19 genetic polymorphism shows obvious effect on lansoprazole pharmacokinetics, which is the key factor for causing efficacy of lansoprazole and individual differences among adverse reactions,and clinic should take into account individualized dose regimen of lansoprazole.

Objective To investigate the effects of stromal cell-derived factor 1 (SDF-1) and an CXC chemokine receptor 4 (CXCR4) antagonist (AMD3100) on the invasion and migration capabilities of the huaman choriocarcinoma cell line JAR for further elucidating the role of SDF-1/CXCR4 axis in the pathogenesis of preeclampsia.Methods JAR cells were divided into four groups: SDF-1 group (treated with 50 ng/ml of SDF-1),SDF-1+AM3100 mixed group (first treated with 100 ng/ml of AMD3100 for 2 hours and then treated with 50 ng/ml of SDF-1),AMD3100 group (treated with 100 ng/ml of AMD3100) and blank control group (without any treatment).RT-PCR was performed to detect the expression of CXCR4 at mRNA level in JAR cells.Western blot assay was used to measure the expression of CXCR4 and p-AKT at protein level.MTT assay was used to analyze the effects of different concentrations of SDF-1 (10,30,50 and 100 ng/ml) on the proliferation of JAR cells at different time points (0,24,48,72 h).Transwell invasion assay and wound-healing assay were used to test the changes in invasion and migration capabilities of JAR cells after different treatments.Results (1) Results of the RT-PCR showed that the expression of CXCR4 at mRNA level in JAR cells was increased in the SDF-1 group (1.839±0.083) as compared with that in the blank control group (1.372±0.086),AMD3100 group (0.694±0.045) or SDF-1+AM3100 mixed group (0.703±0.093).Moreover,the differences between the SDF-1 group and the other three groups were statistically significant (F=30.67,P<0.05).Compared with the blank control group,the expression of CXCR4 at mRNA level in JAR cells was decreased in the AMD3100 group (P<0.01).(2) Results of the Western blot assay showed that the expression of CXCR4 and p-AKT at protein level in JAR cells were enhanced in the SDF-1 group as compared with that in the blank control group,AMD3100 group or SDF-1+AM3100 mixed group.Compared with the blank control group,the expression of CXCR4 and p-AKT at protein level in JAR cells were inhibited in the AMD3100 group.(3) Results of the MTT assay showed that SDF-1,especially at the concentration of 50 ng/ml,could enhance the proliferation of JAR cells (P<0.05) and its best effect on proliferation was seen at 48 h.(4) Results of the Transwell invasion assay showed that the number of transmembrane cells in the SDF-1 group (70.49±2.42) was more than that in the blank control group (54.36±2.26),AMD3100 group (21.68±8.31),or SDF-1+AMD3100 mixed group (28.18±4.61).The differences between the SDF-1 group and the other three groups were statistically significant (F=116.26,P<0.01).Compared with the blank control group,the number of transmembrane cells was reduced in the AMD3100 group (P<0.05).(5) Results of the wound-healing assay showed that the relative migration distance was increased in the SDF-1 group (1.162±0.034) as compared with that in the blank control group (0.823±0.101),AMD3100 group (0.160±0.047),or SDF-1+AMD3100 mixed group (0.183±0.064).The differences between the SDF-1 group and the other three groups were statistically significant (F=30.500,P<0.05).Compared with the blank control group,the relative migration distance was decreased in the AMD3100 group (P<0.01).Conclusion The invasion and migration of huaman choriocarcinoma JAR cells can be enhanced by SDF-1,but inhibited by AMD3100.This study indicates that the blocked biological axis of SDF-1/CXCR4 may play an important role in the pathogenesis of preeclampsia through inducing abnormal activation of PI3K/AKT pathway,which results in inhibited invasion and migration of trophoblast cells and placenta abnormality.

Objective:To investigate the effect on the CXCR4/PI3K/AKT pathway after the transfection of miR-155 mimics and miR-155 inhibitor combined with the research on the ability of invasion and migration of human chorionic JEG-3 trophoblast cells. Methods:Chemically synthesized miR-155 mimics and miR-155 inhibitor were transfected into JEG-3 cells. The effect on the ability of invasion and migration were analyzed by Transwell migration assay and Wound healing assay. The expression of CXCR4 mRNA was detected by Real-time PCR. The expression of CXCR4 and p-AKT protein were detected by Western blot. Results: Transfection with miR-155 mimics significantly down-regulated the expression of CXCR4 as compared with the control group(P<0. 05);JEG-3 cells transfected miR-155 mimics had lower levels of migration and invasion capacity than cells in the control group(P<0. 05). However, transfection with miR-155 inhibitor significantly up-regulated the expression of CXCR4 as compared with the control group(P<0. 05);JEG-3 cells transfected miR-155 inhibitor had higher levels of migration and invasion capacity than cells in the control group ( P<0.05).Addition,the expression of p-AKT protein of JEG-3 cells was down-regulated after transfected miR-155 mimics,and the expression of p-AKT protein of JEG-3 cells was up-regulated after transfected miR-155 inhibitor. Conclusion:miR-155 may inhibits the invasion and migration of trophoblast cells by regulating CXCR4/PI3K/AKT pathway contributing to the development of preeclampsia.

Objective To investigate the expression changes and clinical significance of microRNA-155(miR-155) and chemokine receptor 4(CXCR4) in placental tissue from the patients with preeclampsia(PE).Methods Thirty pregnant women with severe PE(sPE) in the Third Affiliated Hospital of Zhengzhou University from December 2015 to February 2016 served as the sPE group,and contemporaneous 30 healthy pregnant women undergoing cesarean section due to the social factors served as the healthy control group(N).The real-time fluorescent quantitative PCR(RT-PCR) was used to detect the expression of miR-155 and CXCR4 mRNA in placental tissue and the relationship between miR-155 and CXCR4 levels was analyzed.The immunohistochemistry SABC methods were used to detect the expression of CXCR4 protein in villous cytotrophoblast(VCT) tissue microarray(TMA,42 cases in the normal control group 1,56 cases in the PE group) and extravillous cytotrophoblast(EVCT) TMA(29 cases in the normal control group 2,47 cases in the PE group) constructed by the same research group.Results (1) There was no statistically significant difference in the age,gestational age and pre-pregnancy body mass index(BMI) between the two groups(P>0.05).The differences of blood pressure between the two groups were statistically significant(P<0.05).The neonatal birthweight in the sPE group was significantly lower than that in the control group with statistically significant differences(P<0.05).The urine protein in the sPE group was significantly higher than that in the control group with statistically significant differences(P<0.05).(2)In the placental VCTand EVCT TMA,the age had no statistical difference between the two groups(P>0.05).The gestational weeks of the PE group were earlier than those in the N group 1,the systolic/diastolic blood pressure and urine protein were higher than those in the N group,the differences all were statistically significant(P<0.05),the neonatal birthweight was significantly lower than that in the N group with statistically significant differences(P<0.05).(3)The expression level of miR-155 mRNA in placental tissue in the sPE group was 1.53±0.92,which was significantly higher than 0.87±0.73 in the control group,the difference between the two groups was statistically significant(P<0.05).(4) The expression level of CXCR4 mRNA in the N group was 1.51±1.85,which in the sPE group was 0.54±0.38,the difference between the two groups was statistically significant(P<0.05).(5) In the sPE group,the miR-155 level and CXCR4 level in placntal tissue had a significant correlation(r=-0.773,P<0.05).(6) CXCR4 protein was expressed in VCT and EVCT TMA;the CXCR4 positive expression rate of the PE group in VCT TMA was 48.21%(27/56),which in the sPE group was 47.92%(23/48) and which in the early onset PE group was 53.66%(22/41),which all were significantly lower than 83.33%(35/42)in the normal control group,the differences all were statistically significant(P<0.05).(7)The positive expression rate of CXCR4 in the PE group in placent EVCT TMA was 48.94%(23/47),which in the sPE group was 50.00%(22/44) and which in the early PE onset group was 52.63%(20/38),which all significantly lower than 79.31%(23/29) in the normal control group,the differences all were statistically significant(P<0.05).Conclusion The level of placental tissue miR-155 is increased in the patients with sPE,while the level of CXCR4 is decreases obviously,both have a negative correlation,which may be associated with the pathogenesis of PE.

Primary biliary cholangitis (PBC) is a chronic cholestatic liver disease with unknown etiology, and patients with poor response to ursodeoxycholic acid and obeticholic acid may eventually progress to liver cirrhosis and even liver failure. Liver transplantation is the only effective treatment method for PBC at present. This article elaborates on liver transplantation, survival time after liver transplantation, complications, recurrence of PBC after liver transplantation, and prospects and challenges of liver transplantation in patients with PBC, so as to provide a reference for clinical outcome and treatment after liver transplantation for PBC.

Objective To investigate the potential tigecycline resistance of Klebsiella pneumoniae during treatment.Methods The minimum inhibitory concentrations (MICs) and the mutant prevention concentrations (MPCs) of tigecycline were determined for K.pneumoniae isolates with four different resistant profiles.Corr.elations between MICs and MPCs were analyzed.We combined with the pharmacokinetic parameters of tigecycline to estimate the potential of emerging resistance to tigecycline monotherapy in K.pneumoniae.Results The MPCs of tigecycline for the carbapenem-and fluoroquinolone-resistant isolates were found to be 8-fold higher than those for carbapenem-and quinolones-susceptible isolates.Our data showed that the MPCs range and MPC90 values of tigecycline were 4-512 mg/L and 64 mg/L,respectively,which were much higher than the therapeutic concentrations of tigecycline in serum and tissues.Conclusions Long-term tigecycline monotherapy may predispose the emergence of resistance in K.pneumoniae,which is not recommended.It is desirable to carry out ongoing monitoring of K.pneumoniae susceptibility and tigecycline treatment effect.

Objective: To describe online learning and eye strain situation of college students during the COVID-19 outbreak, to provide a scientific basis for guiding students eye health. Methods: A self-filled electronic questionnaire survey through questionnaire star was administered to college students across China. Information about online learning and eye strain of 1 046 college students during the epidemic was collected in Hefei, Anhui Province from March 16 to 20, 2020. The univariate and multivariate Logistic regression analysis were performed to analyze the association between online learning and eye strain of college students. Results: The rate of eye strain during online learning was 72.1%, totally of 68.4% in 421 male students and 74.6% in 625 female students. Boys with online learning time <6 h/d, slow internet access，difficulty in understanding online class reported higher rate of eye strain than girls( χ 2=17.36,8.72,7.02, P ＜0.05). Freshmen reported the highest rate of slow internet access occasionally and active online class( χ 2=15.26,16.11, P ＜0.05), junior students reported highest rate of online learning time <6 h/d, and easy understandable online class( χ 2=15.33,32.59, P ＜0.05), medical college students reported higher rate of slow internet access, inactive online class than non-medical college students( χ 2=11.79,11.03, P ＜0.05). Multivariate Logistic regression analysis showed that odds ratio( OR ) of eye strain in females was 1.40 (1.06-1.87), compared with males; the OR of eye strain were 1.43 (1.01-2.03) and 1.54 (1.10-2.15) in the groups with online learning time 6-<8 h/d and ≥8 h/d, respectively, compared with the group with online learning time <6 h/d, the OR of eye strain in the groups with slow internet access was 2.28 (1.25-4.14), compared with students without slow internet access, the OR of eye strain in the capable to understand and difficult to understand group were 2.54 (1.73-3.74) and 5.40 (2.70-10.80) respectively, compared with the easy to understand group. Conclusion Female students, online learing time ≥ 8 h/d, slow internet access, difficult to understand class content were positively related with college students eye strain. Attention should be paid to the eye health of college students to reduce the adverse effects of online learning on vision.during the COVID-19 epidemic.