目的为了便于食管癌大规模流行病学筛查工作的开展,探讨一种能快速敏感地检测口腔牙龈卟啉单胞菌(Porphyromonas gingivalis,P.gingivalis)DNA的免核酸抽提直接PCR方法。方法收集我院门诊100例体检人员的200份口腔拭子(每人双份),以TE b...目的为了便于食管癌大规模流行病学筛查工作的开展,探讨一种能快速敏感地检测口腔牙龈卟啉单胞菌(Porphyromonas gingivalis,P.gingivalis)DNA的免核酸抽提直接PCR方法。方法收集我院门诊100例体检人员的200份口腔拭子(每人双份),以TE buffer(10 mM Tris,0.1 mM EDTA,pH 8.0)、商品化裂解液以及核酸抽提试剂盒等作为基因组提取试剂,使用P.gingivalis特异引物探针进行直接定量PCR检测。结果与裂解液-直接qPCR法相比,TE-直接qPCR法的灵敏度为94.12%,特异性为100%;与试剂盒-qPCR法相比,TE-直接qPCR法的灵敏度与特异性均为100%;TE-直接qPCR法与裂解液-直接qPCR法以及与试剂盒-qPCR法检测P.gingivalis均具有高度一致性(分别为Kappa=0.954,Kappa=1);TE-直接qPCR法与试剂盒-qPCR法检测阳性P.gingivalis的Ct均值无显著差异(P=0.907)。结论TE-直接qPCR法检测口腔P.gingivalis灵敏度高、特异性强,是快速高效检测口腔P.gingivalis的理想方法,可用于食管癌大规模分子流行病学研究。展开更多
Background Control of hypersecretion of certain hormones is one of the key targets in the treatment of pituitary adenomas. RNA interference has been shown to inhibit protein expression, and thus it may represent a pro...Background Control of hypersecretion of certain hormones is one of the key targets in the treatment of pituitary adenomas. RNA interference has been shown to inhibit protein expression, and thus it may represent a promising method for the treatment of pituitary adenomas. In the present study, transfection efficiency of small interfering RNA （siRNA） was optimized in human prolactinoma cells. Methods First, a method was optimized to extract highly purified human prolactinoma cells in vitro. The extracted cells were verified to retain the physiological features of prolactin （PRL） secretion. Second, three conditions for siRNA transfection were tested by the evaluation of transfectfon efficiency and cell viability. The proper transfection condition was verified for human prolactinoma cells. Third, the siRNA for prolactin was transfected into the human prolactinoma cells, and the suppression of PRL mRNA was evaluated by quantitative real-time reverse transcription-PCR. Results The siRNA of 100 pmol with Lipofectamine 2000 of 5 μl for 1×10^6 cells was proved preferable, with transfection efficiency being 53.3% and cell viability being 69.7%. In the preliminary experiment the siRNA against PRL decreased the mRNA of PRL by 34.0%. Conclusion It is possible to inhibit hormone hypersecretion by RNA interference, that may eventually enable therapeutic siRNA drugs developed.展开更多
Background Tumor intrinsic chemoradiotherapy resistance is the primary factor in concomitant chemoradiotherapy failure in advanced uterine cervical squamous cell carcinoma. This study aims to identify a set of genes a...Background Tumor intrinsic chemoradiotherapy resistance is the primary factor in concomitant chemoradiotherapy failure in advanced uterine cervical squamous cell carcinoma. This study aims to identify a set of genes and molecular pathways related to this condition.展开更多
文摘目的为了便于食管癌大规模流行病学筛查工作的开展,探讨一种能快速敏感地检测口腔牙龈卟啉单胞菌(Porphyromonas gingivalis,P.gingivalis)DNA的免核酸抽提直接PCR方法。方法收集我院门诊100例体检人员的200份口腔拭子(每人双份),以TE buffer(10 mM Tris,0.1 mM EDTA,pH 8.0)、商品化裂解液以及核酸抽提试剂盒等作为基因组提取试剂,使用P.gingivalis特异引物探针进行直接定量PCR检测。结果与裂解液-直接qPCR法相比,TE-直接qPCR法的灵敏度为94.12%,特异性为100%;与试剂盒-qPCR法相比,TE-直接qPCR法的灵敏度与特异性均为100%;TE-直接qPCR法与裂解液-直接qPCR法以及与试剂盒-qPCR法检测P.gingivalis均具有高度一致性(分别为Kappa=0.954,Kappa=1);TE-直接qPCR法与试剂盒-qPCR法检测阳性P.gingivalis的Ct均值无显著差异(P=0.907)。结论TE-直接qPCR法检测口腔P.gingivalis灵敏度高、特异性强,是快速高效检测口腔P.gingivalis的理想方法,可用于食管癌大规模分子流行病学研究。
文摘Background Control of hypersecretion of certain hormones is one of the key targets in the treatment of pituitary adenomas. RNA interference has been shown to inhibit protein expression, and thus it may represent a promising method for the treatment of pituitary adenomas. In the present study, transfection efficiency of small interfering RNA （siRNA） was optimized in human prolactinoma cells. Methods First, a method was optimized to extract highly purified human prolactinoma cells in vitro. The extracted cells were verified to retain the physiological features of prolactin （PRL） secretion. Second, three conditions for siRNA transfection were tested by the evaluation of transfectfon efficiency and cell viability. The proper transfection condition was verified for human prolactinoma cells. Third, the siRNA for prolactin was transfected into the human prolactinoma cells, and the suppression of PRL mRNA was evaluated by quantitative real-time reverse transcription-PCR. Results The siRNA of 100 pmol with Lipofectamine 2000 of 5 μl for 1×10^6 cells was proved preferable, with transfection efficiency being 53.3% and cell viability being 69.7%. In the preliminary experiment the siRNA against PRL decreased the mRNA of PRL by 34.0%. Conclusion It is possible to inhibit hormone hypersecretion by RNA interference, that may eventually enable therapeutic siRNA drugs developed.
文摘Background Tumor intrinsic chemoradiotherapy resistance is the primary factor in concomitant chemoradiotherapy failure in advanced uterine cervical squamous cell carcinoma. This study aims to identify a set of genes and molecular pathways related to this condition.
