Objective To compare the ratios of neuron and glia differentiated from the embryonic human neural stem cells(hNSCs) at different times in vitro. Methods The cells from hippocampus of aborted human embryo tissue(8-12 weeks after conception) were mechanically dissociated and cultured with DMEM/F 12 medium containing h-EGF,h-bFGF,h-LIF.The NSCs were induced to differentiate by 1%FBS and identified by Musashil,?-Ⅲ Tubulin,GFAP and Galc immuno-cytochemical staining at different times. Results The cell spheres were Musashil positive at the 12th hour after differentiation.On the 2nd day after differentiation,a few cells exhibited ?-Ⅲ Tubulin and GFAP immunoreactivities,but no Galc positive cells.The number of ?-Ⅲ Tubulin immuno-positive cells reached the highest on the 7(th) day and the percent was 48.2%.The number of GFAP immuno-positive cells increased from the 2nd to the 23rd day and the positive ratio reached 65.3%.A few Galc immuno-positive cells were detected with time passing.Conclusion 1% FBS may promote human NSCs to differentiate into three cell types of central nervous system,and the ratios of differentiated neuron and glia are significantly different at various times.

Objective To investigate whether association of the genotype at the HLA A,B and DRB1, B3 B4 B5 loci with the Susceptipility to hemorrhagic fever with renal syndrome (HFRS) in Chinese Hans. Methods HLA A,B antigen types were detected by immunoserologic method and the genotypes of HLA DRB were identified by PCR/SSP method. Results The results showed that The Frequencies of A1, HLA DRB1 * (15,16) and DRB5 were increased in patients as compared to the healthy controls ( P

Objective To explore analysis method of repeated measurements in single-sample. Methods Mixed linear model was presented and an example of repeated measurements in single-sample was analyzed. Results The reasonable results were obtained for repeated measurements in single-sample by the methods of mixed linear model. Conclusion Mixed linear model can be used to analyze repeated measurement data in single-sample.

Objective To investigate the gene expression of methyl-CpG-binding protein 2 (MeCP2) and methyl-CpG-binding domain 2 (mbd2) in patients with systemic lupus erythematosus(SLE) and their significance in the pathogenesis of SLE. Methods Semiquantitative reverse transcriptase-PCR was applied to detect the mRNA expression of MeCP2 and mbd2 in PBMCs obtained from relieved (n=17), active (n=17) SLE patients and healthy controls (n=17). The correlations were further analyzed among these parameters. Results No significant difference was observed in the expression level of MeCP2 mRNA among active SLE patients, relieved SLE patients and healthy controls (P>0.05). The expression of mbd2 in relieved SLE patients was significantly higher than that in health controls (t=12.8, P<0.01), but lower than that in active SLE patients (t=20.0, P<0.01). The expression of mbd2 positively correlated with SLEDAI (r=0.737, P=0.0001) of patients with SLE, and a positive correlation was also observed between the expression of mbd2 and MeCP2 in healthy controls (r=0.550, P=0.0222). Conclusions The expression of MeCP2 and mbd2 may be mutually constrained in normal human, but this relationship seems to be disturbed in patients with SLE.

Objective To investigate the effects of HIF-1α expression regulated by Tet-on gene expression system on cell proliferation and cell cycle of hepatoma cells in vitro. Methods The change of human hepatocellular carcinoma cell lines HepG2 cell cycle and cell proliferation was measured after HIF-1 α expression of HepG2 in vitro was regulated by Tet-on expression system. Results Amplified products were confirmed as the cDNA of HIF-1α by DNA sequencing, and pTRE-HIF-1α obtained by edonuclease digestion,capable of expression in HepG2 Tet-on cells. After being incubated under different concentrations of doxycycline for 48 h, MTT assays showed that up-regulation of HIF-1α expression increased HepG2 cell proliferation activities. The cell index of S and G2/M phase was significantly higher and that of G0/G1 phase reduced with the increasing concentrations of doxycycline. The mRNA expression of Cyclin A increased with the increasing concentrations of doxycycline ( P ＜ 0. 001 ), CyclinD1 and CyclinE did not change ( P ＞0. 05). Conclusion HIF-1 α gene promotes cell proliferation and cell cycle of hcpatoma cells in vitro, and this effects increased with the increasing of HIF-1α expression possibly through influencing the expression of CyclinA.

15.0%.CONCLUSIONS The most common pathogens causing nosocomial infection are Gram-negative bacteria.The resistance rates are high.Antibiotics policy is urgently needed in order to delay the resistance onset development.

OBJECTIVE To strengthen the management for preventing and controlling nosocomial infection.METHODS The normal work in this field according to the standards of Ministry of Health was summarized.RESULTS Changing the cognition of management of nosocomial infection to comprehend the meaning of management of nosocomial infection.CONCLUSIONS We can control nosocomial infection and ensure medical safety with the recognition of the leader,consummating organization,perfecting system,normalizing management,cooperating among departments,staff's effort and ensuring supply.

To investigate the prevalence of Toxoplasma gondii infection among hepatitis B virus (HBV) patients in northern Shaanxi Province,139 patients and 43 healthy controls were recruited.All the plasma was screened for IgG antibody of Toxoplasma gondii.Then,the association between Toxoplasma gondii infection and HBV were analyzed.Results showed that the prevalence of Toxoplasma gondii infection was relative low with just 5.04％ in HBV patients but zero in healthy control.Most of those infected with toxoplasma gondii were male,HBeAg positive or with higher HBV viral load.However,no significant relationship was found between Toxoplasma gondii infection and gender,HBeAg status or viral load in univariate analyses.This study indicated the relative low infection rate of Toxoplasma gondii,which had no association with HBV infection in northern Shaanxi Province.

Objective:To observe the effect of different TCM prescriptions of JinKuiYaoLve on levels of noradrenaline(NE), dopamine(DA) and 5-hydroxytryptamine(5-HT) in lung and brain tissues of pulmonary fibrosis in the early stages. To investigate the effect and mechanism of TCM prescriptions and the nature of prescription-syndrome. Methods: The wistar rats were divided into groups randomly. Pulmonary fibrosis was induced by bleomycin A5 in all groups except normal group. Rats in drug group were killed after 7 days' treatment. The levels of NE, DA and 5-HT in the lung and brain tissues were detected. Results: The level of NE in the lung tissue of model group was higher than that of normal group, Gualouxiebai decoction(GLXB) group and prednisone group. The level of 5-HT of model group was lower than that of Shenqi Pills(SQW) group and prednisone group. The level of DA of SQW group was lower than that of GLXB group. The level of NE in the brain tissue of model group was higher than that of normal group, but the level of DA was lower than that of normal group, GLXB group and Maimendong decoction(MMD) group. The level of 5-HT of Dahuangzhechong pills (DHZCW) group was higher than that of other groups(P

Objective To investigate the noninvasive indicators of indications for antiviral therapy in HBeAg-negative chronic hepatitis B virus (HBV) infection patients with alanine aminotransferase (ALT) ≤40 U/L under the guidance of liver pathology. MethodsA retrospective analysis was performed for the clinical data of 377 HBeAg-negative chronic HBV infection patients with ALT ≤40 U/L who were hospitalized in Affiliated Hospital of Yan’an University, from October 2013 to August 2018 and underwent liver biopsy, among whom the patients with inflammatory activity ＜A2 and fibrosis stage ＜F2 were enrolled as non-antiviral therapy group(n=266), and the patients with inflammatory activity ≥A2 or fibrosis stage ≥F2 were enrolled as antiviral therapy group(n=111). The chi-square test was used for comparison of categorical data between two groups; the t-test was used for comparison of normally distributed continuous data between two groups, and the Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups; univariate and multivariate binary logistic regression analyses were used to screen out the influencing factors for the initiation of antiviral therapy; the receiver operating characteristic (ROC) curve was plotted to evaluate the diagnostic efficiency of each indicator in determining the need for antiviral therapy in HBeAg-negative chronic HBV infection patients with ALT ≤40 U/L. ResultsOf all 377 patients, 266 (70.6%) did not need antiviral therapy for the time being, and 111 (29.4%) had marked liver damage and thus needed active antiviral therapy. The multivariate analysis showed that liver stiffness measurement (LSM) (odds ratio ［HR］=2.003, 95% confidence interval ［CI］: 1.647-2.437, P＜005), HBsAg (HR=1.563, 95% CI: 1.110-2.200, P＜0.05), HBV DNA (HR=1.519, 95% CI: 1173-1.966, P＜0.05), and albumin (HR=0.939, 95% CI: 0.884-0.998, P＜0.05) were independent influencing factors for the initiation of antiviral therapy. The ROC curve analysis showed that the area under the ROC curve (AUC) was 0.749 (95% CI: 0.699-0799) for LSM, 0642 (95% CI: 0.586-0.699) for HBV DNA, and 0.565 (95% CI: 0.507-0.623) for HBsAg, and the combination of LSM, HBV DNA, and HBsAg had a larger AUC of 0.779 (95% CI: 0.732-0.827). ConclusionThe levels of LSM, HBV DNA, and HBsAg have a reference value in determining the initiation of antiviral therapy in HBeAg-negative chronic HBV infection patients with ALT≤40 U/L.