Objective To perform a meta-analysis on the association of of genotype B/C and HBV DNA conversion of negative or HBeAg clearance to lamivudine therapy.Methods Several databases (PubMed, Web of Science, Science Direct, and CNKI Database) were searched from 1966 to 2012 for all publications on the association between genotype B/C and response to LAM therapy.The articles were selected according to the protocol previously designed.Meta analysis using Revman 5 software.Results Finally, 19 RCTs were retrieved involving 3148 patients for the subsequent meta-analysis. Among them, 10 articles (n=1860) look at HBV DNA and 9 (n=1288) at HbeAg clearance.For HBV DNA conversion of negative, the overall RR (95% CI) associated with genotype B/C was 1.07(0.98-1.17). Of the nine analyzed trials, HBeAg clearance was observed in genotype B group as compared with that genotype C group, the overall RR (95% CI) was 1.27 (0.94-1.71).Conclusion Meta-analysis indicates that genotype B/C is not associated with response to LAM therapy.Further mechanism researches are required to clarify.Large-scale population studies in multicountries are also necessary to evaluate the influence of HBV genotypes in hepatitis B progression and antiviral treatment.

Toll-like receptor 4(TLR4)is a member of the TLRs superfamily,mainly capable of identifying bacterial endotoxin,lipopolysaccharides and lipooligosaccharides of Gram-negative bacte?ria cell walls to prevent microbial invasion. Activation of TLR4 can induce production of proinflammato?ry cytokines and inflammatory chemokines and regulate natural immunity. However,dysregulation of TLR4 can lead to autoimmune diseases. This review summarized the biological structure of TLR4 and recognition mechanisms between TLR4 and its ligands,surveyed TLR4 ligands including lipid A ana?logues,natural products and synthetic small molecules,discussed the structure-activity relationship of TLR4 modulators and the ligand-receptor and protein-protein interactions in the complex,and outlined the prospect of future research and development of TLR4 ligands.

10.3969/j.issn.2095-4344.2013.24.013

Objective To explore the efficacy of calmodulin antagonist berbamine(BBM)on multidrug resistance(MDR)reversal and its mechanism. Methods Human breast cancer cell line MCF7 and its adriamycin-resistant counterpart MCF7/ADR were used in the study.The cells were cultured with ADR and different concentration of BBM. MTT assay was used to analyze the effect of BBM on cell growth inhibition.According to the MTT assay,the 50% inhibitory concentration(IC 50 ),the multiples of drug resistance and increased sensitivity of ADR were calculated.The concentration of intracellular ADR and expression level of P-glycoprotein(P-gp)were detected by flowcytometry(FCM).The mRNA expression level of mdr1 gene was detected by semi-quantitative reverse transcriptase polymerase chain reaction(RT-PCR)with ?-actin as internal reference. Results The IC 50 of ADR in MCF7 and MCF7/ADR cells were(0.98?0.06)?mol/L and(101.20?5.72)?mol/L,respectively.The resistant multiple of MCF/ADR cells to ADR was 103 folds higher than that of MCF7 cells.BBM increased the chemo-sensitivity of ADR in MCF7/ADR cells with dose-dependent relationship,i.e.when 5*!?mol/L ,10*!?mol/L and 20*!?mol/L BBM was added into the culture the chemo-sensitivity of ADR was increased to 2.76,5.88,and 28.26 folds(P

Objective To investigate the role of the clock gene promoter methylation in aging. Methods C57BL mice of 4- (young, n=9) and 20- (old, n=10) month-old were determined the promoter methylation level of clock genes (Per1/2, Bmal1/2, Cry1/2, Clock, Npas2) in the stomach, spleen, vascular, kidney and striatum with methylation-specific polymerase chain reaction (MSP). Results The incidence of promoter methylation of Cry1, Bmal2 and Npas2 in spleen increased in old mice (P<0.05), while the promoter methylation of Per1 in stomach decreased (P<0.05), and the promoter methylation of Bmal1 in vascular increased (P<0.05). Conclusion Promoter methylation of some clock genes is involved in process of aging in a tissue-specific way.

Catheter Ablation ; Cold Temperature ; Cysts ; congenital ; Humans ; Tongue ; pathology ; surgery

Objective To investigate the current status of healthcare-associated infection (HAI),community-associated infection(CAD,and antimierobial use in hospitalized patients in medical institutions of Guizhou Province.Methods In September 2014,infection status of hospitalized patients in 174 second level hospitals and above in Guizhou Province were performed cross-sectional survey.Results A total of 68 419 patients were surveyed,the actual survey rate was 99.65％.1 581 patients developed 1 684 cases of HAI,HAI prevalence rate and HAI case prevalence rate were 2.31％ and 2.46％ respectively,18 571 patients developed 19 191 cases of HAI,CAI prevalence rate and CAI case prevalence rate were 27.14％ and 28.05％ respectively;patients in general intensive care unit(ICU) and pediatric department(non-neonatal group) had the highest HAI and CAI prevalence rates respectively.Constituent ratios of HAI and CAI sites was significantly different(x2 =17 325.44,P＜0.01);Escherichia coli was the main pathogen causing HAI and CAI.Utilization rate of antimicrobial agents on the survey day was 39.82 ％,ICU (80.47 ％) and pediatric department (76.67 ％) were the highest.Therapeutic antimicrobial use accounted for 67.48 ％ (n =18 386),single antimicrobial use accounted for 79.55 ％ (n =21 672).Pathogenic detection rate of specimens from patients receiving therapeutic antimicrobial agents was 31.76％.Conclusion This survey is helpful for understanding the high risk departments and sites of HAI and CAI in Guizhou Province,as well as pathogenic detection rate of specimens from patients receiving therapeutic antimicrobial agents,which provides basis for further prevention and control of HAI.

Objective:To investigate the synergistic killer effect of natural killer cells(NK cells) combined with tamoxifen(TAM) on breast cancer cells(BCC)through the experiment in vitro,and to explore its mechanism.Methods:Three kinds of BCC with different receptor expression levels were selected for the experiment.Blank control group, different concentrations of TAM groups and different time groups were set up.MTT assay was used to detect the inhibitory rates of proliferation of cells,and the final experiment concentration of 5 μmol·L-1 was determined.The cells were divided into natural-release group,largest-release group,TAM group,NK cells group, and combined-experimental group(BCC+NK cells+TAM),and the synergistic killer effect of NK cells combined with TAM in different effector-target ratios were detected with Calcein-AM release assay.In ELISA assay the cells were divided into blank control group (NK cells),NK cells+TAM group, NK cells+BCC group and combined-experimental group,and the levels of IFN-γ and TNF-α in the NK cells in various groups were measured.In flow cytometry detection the cells were divided into blank control group (NK cells),NK cells+TAM group,NK cells+ BCC group, and combined-experimental group,and the expression levels of NKp46,CD158a,CD158b,CD158b2,and CD158e were determined;while the cells were divided into blank control group (BCC),BCC+TAM group,BCC + NK cells group, and combined-experimental group,and the expression levels of the MICA,ULBP1 and ULBP2 were detected.Results: The MTT assay results showed that the inhibitory rates of proliferation of 3 kinds of BCC had obvious time-and concentration-dependence (P<0.05).The Calcein-AM release assay results showed that the killing-rates of BCC in TAM groups were increased with the increase effector-target ratios of compared with NK cells group;and the killing-rate in combined experimental group was obviously higher than those in NK cells and TAM groups(P<0.05).The ELISA assay results showed that the levels of TNF-α and IFN-γ of NK cells in various experimental groups with BCC or not were increased compared with blank control group(P<0.05 or P<0.01);the levels were significantly increased when combined with TAM (P<0.05).The flow cytometry results showed that the NKp46 expression levels in various experimental groups were elevated compared with blank control group(P<0.05);the expression levels of CD158a, CD158b,CD158b2, and CD158e were significantly decreased(P<0.05);the expression levels MICA,ULBP1, and ULBP2 in BCC were significantly increased (P<0.05).Conclusion:The NK cells combined with TAM has the synergistic killer effect on the BCC in vitro.The synergetic mechanism may be as follows: TAM could increase the secretion of TNF-α and IFN-γ of NK cells to enhance their cytotoxicity;TAM also could up-regulate the expression levels of activating receptors and activating ligands,and down-regulate the expression levels of inhibitory receptors to increase the killing ability of NK cells.

The aim of this study was to explore the effects of ZGXF decoction on amphetamine-induced rotation in PD rats with syndrome of liver-yang hyperactivity,and its mechanism involved.Rats received 6-OHDA administration via intra-substantia nigra injection and were intragastrically treated by Fu Zi decoction to establish the PD model with the syndrome of liver-yang hyperactivity.Three doses of ZGXF decoction or selegiline were given by a 28-day intragastric administration.The rats were tested for amphetamine-induced rotation asymmetry.In addition,real-time PCR were adopted to analyze the expressions of Nfe212 and Hmox1 mRNAs,while western blot to analyze the expression of Keap1 protein.As a result,it was found that ZGXF decoction dose-dependently attenuated amphetamine-induced rotation,up-regulated the expressions of Nfe212 and Hmox-1 mRNAs,and down-regulated the expression of Keap1 protein in the substantia nigra in PD rats with syndrome of liver-yang hyperactivity.It was suggested that anti-PD effects of ZGXF decoction be attributed to the up-regulation of Nfe212 and Hmox-1 mRNAs and the down-regulation of Keap1 protein,being associated with oxidative stress,in the substantia nigra of PD rats with syndrome of liver-yang hyperactivity.

Objective To investigate the relationship on the excision repair cross complementing gene 1(ERCC1)‐4533/8092 site single nucleotide polymorphisms(SNPs) and the susceptibility to hepatocellular carcinoma(HCC) in Guangxi Zhuang population . Methods Polymerase chain reaction‐restriction fragment length polymorphism (PCR‐RFLP) method was used to detect the ER‐CC1‐4533/8092 gene polymorphism in 88 cases with primary liver cancer and 82 cases of normal controls .Results There was no difference in the frequency distribution of ERCC1‐4533 in the case group and the control group ,the frequency distribution of the ERCC1‐8092 in the case group and the control group was different(P< 0 .05) .Compared with ERCC1‐8092 CC ,ERCC1‐C8092 CA/AA had higher risk of primary hepatocellular carcinoma(CA :OR=2 .556 ,95% CI:1 .345 -4 .855;AA :OR= 8 .667 ,95% CI:1 .000-75 .092) .ERCC1‐8092 C allele as a reference ,ERCC1‐8092 A allele can increase the risk of primary liver cancer (OR=2 .387 ,95% CI:1 .428-3 .992) .Conclusion The genetic polymorphisms of ERCC1‐8092 sites are associated with susceptibility to hepatocellular carcinoma in Guangxi Zhuang population .