OBJECTIVE To study 39 kinds of resistant-related genes in a pan-resistant Burkholderia cenocepacia(BCE) strain,in the sputum from a severe hepatitis B patient.METHODS To detect the susceptibility to antimicrobial agents by MIC,16S rRNA,39 resistant-related genes including 29 ?-lactamases genes,6 aminoglycoside-modifying enzymes(AMEs) genes,chlorhexidine/sulfadiazine resistant gene(qacE△1-sul1),integron(intⅠ1,2,3),et al,of 1 strain of BCE in the sputum from a severe hepatitis B patient,were measured by PCR,and verified by DNA sequencing.RESULTS The strain was BCE conformed by 16S rRNA-PCR-DNA sequencing.It was susceptible to ceftazidime,cefepime,ciprofloxacin,levofloxacin,and trimethoprim/sulfamethoxazole,but resistant to piperacillin,aztreonam,cefotaxime,cefoxitin,meropenem,imipenem,nitrofurantoin,gentamicin and amikacin.There were positive of 6 kinds of resistant-related genes(blaTEM-116,aac(6′)-Ⅰb,aac(3)-Ⅰ,ant(2″)-Ⅰ,ant(3″)-Ⅰ,and intⅠ1),28 kinds of ?-lactamases genes,2 kinds of AMEs genes(aac(6′)-Ⅱ and aac(3)-Ⅱ),2 kinds genes of intⅠ(intⅠ2 and intⅠ3) were negative.CONCLUSIONS The multi-resistant BCE is with its multiple resistant mechanisms,and mainly relates to 6 kinds of resistant-related genes(blaTEM-116,aac(6′)-Ⅰb,aac(3)-Ⅰ,ant(2″)-Ⅰ,ant(3″)-Ⅰ and intⅠ1.

OBJECTIVE To study 39 kinds of resistant-related genes in a pan-resistant Alcaligenes xylosoxidans subsp xylosoxidans(AXXxx) in the sputum isolated from a severe hepatitis B patient.METHODS The susceptibility to antimicrobial agents were detected by MIC.16S rRNA and 39 resistant-related genes including 29 ?-lactamases genes,6 aminoglycoside-modifying enzymes(AMEs)genes,1 chlorhexidine-sulfadiazine resistant gene(qacE△1-sul1)and 3 intergron genes separated(intⅠ1,2,3) an AXXxx strain in the sputum of a severe hepatitis B patient were measured by PCR,and verified by DNA sequencing.RESULTS Among the strains,7 kinds of resistant-related genes(blaTEM-116,blaCARB-8,aac(6′)-Ⅱ,aac(3)-Ⅱ,ant(3″)-Ⅰ,qacE△1-sul1,and intI1)detected out.But other 27 kinds of ?-lactamases genes,3 kinds of AMEs(aac(6′)-Ⅰb,aac(3)-Ⅰ,ant(2″)-Ⅰ) genes,and 2 kinds of intⅠ(intⅠ2 and intⅠ3) genes were negative.CONCLUSIONS The pan-resistant A.xylosoxidans,mainly relates to 7 kinds of resistant-related genes(blaTEM-116,blaCARB-8,aac(6′)-Ⅱ,aac(3)-Ⅱ,ant(3″)-Ⅰ,qacE△1-sul1,and intⅠ1).

Objective To study the effect of an angiogenesis inhibitor TNP-470 (TNP )used alone and in combination with cytoxan(CTX) in the treatment of human ovarian cancer transplanted s.c. in nude mice. Methods Human ovarian cancer transplanted s.c. in nude mice model was established, then divided into 5 groups: control group, vehicle group, TNP group,CTX group and TNP+CTX group, different treatments were served from day 8 after transplantation and all mice were sacrificed after 28 days. The weights of the mice and the volumes of the tumors were measured respectively during the therapy time. Moreover, microscopy was done after H&E staining. Results The growth inhibiting rates in the TNP and CTX group were 26.1% and 33.9% respectively; After combined, the rate was increased to 70.5%. There were no obvious decrease in the weight of all treated mice. Conclusions Treatment with TNP is an potentially useful method of antitumor therapy in ovarian cancer, although the inhibition effects were not obvious in small doses. Moreover,TNP could enhance the effectiveness of antitumor drug.

OBJECTIVE To study the antimicrobial susceptibility and distribution of the ?-lactamases producing Escherichia coli from hepatopathy patients.METHODS Thirty-six ?-lactamases producing E.coli strains from hepatopathy patients were detected with a multi-disk test(synergy test,antagonized test for the inducible AmpC ?-lactamases(IABLs)),AmpC ?-lactamases(ABLs)phenotype test and extended-spectrum ?-lactamases(ESBLs) comfirmation test,and the susceptibility of antimicrobial agents with K-B test.RESULTS Twenty-six strains of 38 strains produced the ?-lactamases(68.4%),13(34.2%)strains produced penicillinases,5(13.2%)strains produced broad-spectrum ?-lactamases or penicillinases and 8(21.1%)strains produced ESBLs alone.All were not detected out to produce ABLs and carbapenem-hydrolyzing ?-lactamases(CHBLs);All nonnproducing ?-lactamases strains were sensitive to 9 kinds of antimicrobial agents;but in the 26 strains producing ?-lactamases,the resistant rate to AMP,KZ,FTX,IMP,AK,CN,CIP,SXT and TET were 100.0%,50.0%,30.8%,0,61.5%,15.4%,73.1%,61.5%,and 69.2%,respectively.CONCLUSIONS The rate of ?-lactamases producing E.coli from hepatopathy patients is high.The main types of ?-lactamases are penicillinases and ESBLs.Most strains producing ?-lactamases are susceptible to imipenem and amikacin.

Objective To observe the effect of endothelin-1 (ET-1) on the cell growth, adhesion, migration and expression of intercellular adhesion molecule 1 (ICAM-1) by A375 human malignant melanoma cells. Methods A375 cells were cultured in the presence of ET-1 of various concentrations (0.002, 0.02, 0.2, 2 μg/mL) for different periods. MTT method and flow cytometry were applied to detect the proliferation and ICAM-1 expression of these cells, respectively, after 24-, 48-, and 72-hour treatment. After 24-hour treatment, the cell adhesion and migration of A375 cells were assessed with cell adhesion assay and Transwell chambers, respectively. Results In the case of ET-1 from 0.002 to 0.2 μg/mL, it enhanced the proliferation, adhesion, migration of A375 cells and inhibited the expression of ICAM-1 by A375 cells in a dose dependent manner (P<0.01 or<0.05); however, for ET-1 of 2 μg/mL, the situation was the opposite. Moreover, after 24-hour culture with ET-1 of 0.2 μg/mL, the metabolic activity, cell adhesion rate, and expression of ICAM-1 peaked at 0.327±0.009, (163.31±4.05)% and 4.667±0.551, respectively. Conclusion ET-1 may enhance cellular metabolism and pigmentation by suppressing the expression of ICAM-1 and promoting the proliferation, adhesion and migration of melanoma cells.

Objective To compare the clinical effectiveness,safety,cost-effectiveness of Targeting Gene Therapy with conventional therapy on patients with Essential Hypertension by metoprolol.Methods 300 cases of patients with Essential Hypertension were included.165 cases were chosen and assigned to conventional therapy group(Group A)at random.The subjects of Group A were administrated with metoprolol for 100 mg,twice per day.Polymorphism of CYP2D6 and ?1 adenoreceptor gene of the remain 135 subjects were detected,133 cases with of ?1-AR gene carrying Arg 389 allele were devided into three groups according to CYP2D6 genetype:the poor metabolism group(PM,43 cases),intermediate metabolism group(IM,54 cases)and extensive metabolism group(EM,36 cases).The subjects of PM,IM and EM were administrated with metoprolol for 25,100,200 mg/d respectively,twice per day.Blood pressures and side effects were observed during 8-week following-up.The health economic evaluation on Gene Targeting Therapy was determined by using the cost-effectiveness analysis.Results Total effective rate in Group PM,IM or EM were obviously higher than that in Group A(P

OBJECTIVE To study resistant mechanisms in a pan-resistant Pseudomonas putida strain.METHODS To detect the susceptibility of antimicrobial agents by MIC,6 aminoglycoside-modifying enzymes(AMEs) genes of 1 strain of P.putida were measured by PCR,and verified by DNA sequencing and similarity searches of DNA sequencing data banks using BLAST.RESULTS In the strain,there were 4 positive kinds of AMEs resistant genes(aac(6′)-Ⅰb,aac(3)-Ⅱ,ant(3″)-Ⅰand ant(2″)-Ⅰ).Sequence analysis revealed that the 4 PCR products were AMEs,the aac(6′)-Ⅰb was a new type(GenBank EU 137667).CONCLUSIONS The mechanisms of resistance to aminoglycosides of the pan-resistant P.putida are mainly related to 4 kinds of AMEs,the aac(6′)-Ⅰb is a new type.

OBJECTIVE To study 6 kinds of aminoglycoside-modifying enzymes (AMEs) genes in Chryseobacterium spp isolates. METHODS The isolates were identified by API20NE Gram-negative identification cards,and the susceptibility of antimicrobial agents was detected by MIC kits ( bioM?rieux ) 6 AMEs genes of 2 strains of Chryseobacterium spp were measured by PCR,and verified by DNA sequencing and sequence analysis. RESULTS In the 2 strains,2 kinds of resistant genes [aac(6′)-Ⅱ and ant(2″)-Ⅰ] were positive,and 4 kinds genes of AMEs [aac (6′)-Ⅰb,aac(3)-Ⅱ,ant(3″)-Ⅰ and aac(3)-Ⅰ] were negative.The amplicons were purified,sequenced and analyzed with BLAST 2.0 and found to be identical to aac(6′)-Ⅱ and ant(2″)-Ⅰ. CONCLUSIONS There are AMEs in Chryseobacterium spp isolates. This is the first report on AMEs genes [coexistance of aac(6′)-Ⅱ and ant(2″)-Ⅰ] in Chryseobacterium spp.

OBJECTIVE To study 40 kinds of resistant-related genes in a pan-resistant Pseudomonas aeruginosa.METHODS To detect the susceptibility of antimicrobial agents by MIC,40 resistant-related genes including 29 ?-lactamases genes,porin oprD2 genes,6 aminoglycoside-modifying enzymes(AMEs)genes,chlorhexidine/sulfadiazine resistant gene(qacE△1-sul1)and intergron(intⅠ1,2,3),etc,form 1 strain of P.aeruginosa were measured by PCR,and verified by DNA sequencing.RESULTS In the strain,there were positive of 6 kinds of resistant-related genes(blaTEM,blaOXA10,aac(6′)-Ⅱ,aac(3)-Ⅱ,qacE△1-sul1 and intⅠ1),but without oprD2 genes.Twenty-seven kinds of ?-lactamases genes,4 kinds of AMEs(aac(6′)-Ⅰb,aac(3)-Ⅰ,ant(3″)-Ⅰ and ant(2″)-Ⅰ),and 2 kinds of intⅠ(intⅠ2 and intⅠ3) were negative.CONCLUSIONS The multi-resistant mechanisms of pan-resistant P.aeruginosa are mainly related to 7 kinds of resistant-related genes(blaTEM,blaOXA10,oprD2,aac(6′)-Ⅱ,aac(3)-Ⅱ,qacE△1-sul1 and intⅠ1).

Chikungunya virus ; genetics ; isolation & purification ; China ; Genome, Viral ; RNA, Viral ; genetics ; Sequence Analysis, RNA