Effects of houttuyfonate sodium on eliminating adhesion of Psedomonas aeruginosa and forming biofilms / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the effect of houttuyfonate sodium (HS) on eliminating adhesion of Psedomonas aeruginosa (Pa) and forming biofilms.</p><p><b>METHOD</b>Pa biofilms were established in 96-hold plates. MTT assay was used to evaluate the changes in metabolism of biofilms and assess the minimum eliminating concentration and minimum biofilm inhibitory concentration for adherent Pa. The colony counting method was used to observe the effect of HS on Pa adhesion and biomass in biofilms. SEM was employed to examine the effect of HS on adhesion of tested Pa and morphology of biofilms.</p><p><b>RESULT</b>MEC80 and MEC50 of HS for adherent Pa was 500 mg x L(-1) and 125 mg x L(-1), respectively. Meanwhile, its SMIC80 for either early or mature biofilms of Pa was 500 mg x L(-1), and SMIC50 for early and mature biofilms of Pa were 31.25, 1.95 mg x L(-1), respectively. At the concentration of 250 mg x L(-1), the number of viable bacteria in the state of adhesion and in initial and mature biofilms decreased significantly, compared with the control group (P < 0.05). The number of bacteria on adherent carriers notably reduced under SEM. Following the continuous administration, there were no visible biofilms on carriers in the mature biofilm phase, with the biomass remarkably shrinking and the bacterial morphology changing from bacillus into coccobacillus.</p><p><b>CONCLUSION</b>HS displayed powerful effect on eliminating adherent Pa, and can inhibit Pa biofilm from being formed through continuous administration.</p>

Clinical research of HPV DNA detection and HPV RNA detection in single time / 中华实验和临床病毒学杂志

<p><b>OBJECTIVE</b>To research the application of the single time detection of HPV E6/E7 mRNA and HC2-HPV-DNA in cervical screening project.</p><p><b>METHODS</b>We detected both HPV E6/E7 mRNA and HC2-HPV-DNA of each sample which collected from 130 cervical disease patients' cervix during Jan. 2008 and July. 2009. TCT results were taken as standard to evaluate the diagnostic accuracy of the above two test methods in detecting high-grade cervical disease.</p><p><b>RESULTS</b>82.3% (107/130)women were confirmed to infect HPV by HC2-HPV-DNA detection, and 40.0% (52/130) women were confirmed to infect HPV by HPV E6/E7 mRNA detection, there was no significant difference between the two results (chi2 = 24.5, P < 0.05). The sensitivity, specificity, positive predictive value, negative predictive value of HC2-HPV-DNA detection were 90.1%, 22.1%, 37.4% and 82.6%, respectively. The sensitivity, specificity, positive predictive value, negative predictive value of HPV E6/E7 mRNA detection were 65.9%, 73.3%, 55.8% and 80.8%, respectively.</p><p><b>CONCLUSION</b>In clinical cervical screening project of single time, the combination of HC2-HPV-DNA detection and HPV E6/E7 mRNA detection wick take on more potential value than applying each of them alone. RNA;</p>