简介：目的观察“热敷药”对硬皮病小鼠模型I型胶原、Ⅲ型胶原（COL—I、COL—III）含量的影响。方法60只BALB／c小鼠按照随机原则分为空白组、模型组、西药组、小浓度组、中浓度组、大浓度组各10只，采用博莱霉素皮下注射形成硬皮病模型，造模完成后，根据分组分别给予10％、20％、40％“热敷药”药糊及肝素钠软膏外用，1次/d，连续1个月，空白组及模型组不用药。完成后观察各组皮肤组织病理变化，免疫组化检测皮损COL—I、COL—III蛋白含量。结果与模型组相比较，高、中浓度组硬皮病小鼠模型COL—I、COL—III蛋白含量明显降低，差异较显著（P〈0．05）；结论“热敷药”具有改善硬皮病小鼠模型皮肤硬化，降低COL—I、COL—III的作用。

简介：Objective:Todevelopasensitive,specificandsimplemethodfordetectionofextremelylownumbersofT.palliduminclinicalspecimens,asasignificantadditiontotheserologictestsforsyphilisdiagnosis.Methods:Double-tubenestedPCR(DN-PCR)andsingle-tubenestedPCR(SN-PCR)assayswereperformedtoamplifyspecificfragmentsoftheDNApolymeraseIgene(polA)ofT.pallidum.SensitivityandspecificityofthetwoPCRassaysweretested.EightysixwholebloodspecimensfrompersonswithsuspectedsyphilisweredetectedbythetwonestedPCRmethods.TheTPPAtestwasusedasacomparisonfordetectingsyphilisinserafromcorrespondingpatients.Results:OnlyspecificampliconscouldbeobtainedduringamplificationoftheT.pallidumpolAgeneandthedetectionlimitwasapproximately1organismwhenanalyzedongelbythetwoPCRmethods.Of86clinicalspecimens,62werepositivebyTPPA.Ofthese,54and51werepositivebytheDN-PCRandSN-PCR,respectively,whichdoesnotrepresentastatisticallysignificantdifferencebetweenthetwoPCRtests.Of24TPPA-negativespecimens,5werepositivebybothDN-PCRassayandSN-PCRassay.Conclusion:TheSN-polAPCRmethodisextremelysensitive,specificandeasytoperformfordetectinglownumbersofT.palliduminclinicalbloodspecimensasacomplementarytoserologyforsyphilisdiagnosis.

简介：目的：探讨penAX基因在淋球菌中对头孢曲松敏感性的影响。方法：构建重组质粒pET-28a-penAX,将重组质粒转化到淋球菌WHOP标准株,通过PCR进行鉴定。采用琼脂稀释法测定菌株对头孢曲松的最小抑菌浓度（MIC）,观察转化了pET-28a-penAX质粒的淋球菌对头孢曲松敏感性的变化。结果：成功构建pET-28a-penAX重组质粒,并成功转化了淋球菌WHOP标准株。药敏结果显示转化了pET-28a-penAX质粒的淋球菌比对照株（pET-28a-penA和pET-28a转化株）对头孢曲松的MIC值提高了3.75倍。结论：penAX基因降低了淋球菌WHOP标准株对头孢曲松的敏感性。