RESUMO
Objective To study the non-fermenter isolation rate and its drug resistance to more than 10 kinds of antibiotics at the First Affiliated Hospital to Xinxiang Medical University from the year of 2010 to 2012 in order to offer evidences for reasonable use of drugs by doctors and to prevent nonfermenters from becoming common pathogenic bacteria.Methods The infection and drug resistance of different Nonfermenters (Pseudomonas aeruginosa,Acinetobacter baumannii,Pseudomon as mahophilia,Los non Acinetobacter,Pseudomonas stutzeri,Achromobacter,Bacillus steady short,onions Bock cepacia,meningitis septicemia Elizabeth Kim bacteria)during present 3 years were analyzed by using WHONET 5.5 software.Results The infection rate from non-fermenters as pathogenic bacteria was gradually increased,with the rate from 18.2％ to 27.2％,until 31.2％ ; Acinetobacter Baumannii were isolated as higher infection rate and multiple drug resistance (7.1％ to 18.5％ until 28.7％) in pathogenic bacteria; the infection rate of other non-fermenter with infection rate of high and multiple drug resistance in pathogenic bacteria were gradually increased,such as infection rate or the precedence of Achromobacter xylosoxidans and Pseudomonas maltophilia,especially the precedence of Pseudomonas maltophilia ranged the third in non-fermenters,and Pseudomonas maltophiliai had a higher and multiple drug resistance to many antibiotics; infection rate of non-fermenters with low drug resistance gradually decreased,such as Pseudomonas fluorescens; the drug resistance rate of Acinetobacter Baumannii was higher than that of Pseudomonas aeruginosa and its drug resistance rate was over 50％ to common antibiotics used clinically,as well as Pseudomonas maltophiliai and Empedobacter brevis,especially the resistance rate of Pseudomonas maltophiliai to many commonly used antibiotics was more than 90.0％.Conclusions Non-fermenter isolation rate is becoming higher clinically and its drug resistance becomes more severe,so the sanitation administration department should pay more attention to the use of antibiotics in order to prevent and control drug resistance and higher infection rate caused by non-fermenters as a serious consequence.
RESUMO
Objective:To establish the RPB5-mediating protein (RMP)-silenced stable cell lines and study the inhibitory effects of small interfering RNA (siRNA) targeting RMP gene on the proliferation and migration of human hepatoma SMMC-7721 cells. Methods:Three RMPi siRNAs were designed and synthesized in vitro and transfected into SMMC-7721 cells. The inhibitory effect of siRNA on RMP gene expression was measured by RT-PCR to select the best siRNA. The expression vector pGPU6-Neo-RMP-484 was transfected into SMMC-7721 cells by the lipofectamine and the cells stably expressing the siRNA were selected by G418. RT-PCR was used to detect the interference efficacy against RMP gene. Cell proliferation and adhesion were measured by MTT assay. Wound healing test was used to observe the migration ability of cells. Results:The SMMC-7721 cell lines with down-regulated RMP expression were established by using RNA interference technology. Compared with the negative control cells, expression of RMP mRNA was down-regulated by(83.67±2.56)% .The proliferation of stable-transfected cells was inhibited by(74.33±0.58)% . The adhesion capability of stable-transfected cells was enhanced but the migration capacity was decreased compared with the negative control cells. Conclusion:The pGPU6-Neo-RMP-484 cell lines with stable transfection of RMP siRNA recombinant vector are successfully screened,which can be used as a cellular model for studying the molecular mechanism of RMP. Down-regulation of RMP gene expression can effectively inhibit the proliferation, enhance the adhesion, and decrease the migration of SMMC-7721 cells.