目的了解山东省济宁市诺如病毒的分子流行病学特征及诺如病毒的优势基因型,为诺如病毒感染防控提供科学依据。方法按照《山东省病毒性腹泻监测方案》,2018年1月-2020年12月从山东省济宁市每县(市、区)每月采集3~5份病毒性腹泻标本,进行...目的了解山东省济宁市诺如病毒的分子流行病学特征及诺如病毒的优势基因型,为诺如病毒感染防控提供科学依据。方法按照《山东省病毒性腹泻监测方案》,2018年1月-2020年12月从山东省济宁市每县(市、区)每月采集3~5份病毒性腹泻标本,进行流行病学调查,采用Real time RT-PCR方法检测诺如病毒GI/GⅡ组,对阳性样本进行基因型别鉴定。结果共采集粪便标本1230份,诺如病毒阳性165份(其中GⅠ8份、GⅡ157份),检出率为13.41%(165/1230)。每年除2月份外,其他月份均检出诺如病毒,以6月、7月检出率高。基因型分别为GⅡ.4型25份,占32.05%;GⅡ.2型18份,占23.08%;GⅡ.6型14份,占17.95%;GⅡ.3型13份,占16.67%。3年间优势毒株不同,2018年为GⅡ.3型9份,占69.23%;2019年为GⅡ.2型14份,占43.75%;2020年为GⅡ.4型17份,占53.13%。结论山东省济宁市诺如病毒感染6月和7月流行强度较强,以GⅡ组为主,基因型存在多样性,处于动态变化中,以GⅡ.2[P16]型和GⅡ.4[P31]型为主要型别。展开更多
Background The treatment of patients with small cell lung cancer （SCLC） is based on chemotherapy. However, the treatment is limited by the development of drug resistance. Emodin has been shown to exhibit an anti-can...Background The treatment of patients with small cell lung cancer （SCLC） is based on chemotherapy. However, the treatment is limited by the development of drug resistance. Emodin has been shown to exhibit an anti-cancer effect. But the molecular mechanism remains unclear. This study was conducted to investigate the effect of emodin on the gene expression profile changes in SCLC NCI-H446 cells. Methods NCI-H446 cells were treated with emodin and cell viability was determined by MTT assay. Cell apoptosis was determined by both flow cytometry and caspase-3 activity assay. The effect of emodin on the gene expression profile of NCI-H446 cells was analyzed using cDNA microarray. Semi-quantitative reverse transcriptase-polymerase chain reaction （RT-PCR） was used to validate the microarray results. Results Emodin suppressed viability, induced apoptosis and changed cell cycle of NCI-H446 cells. Among the 1262 genes, 10 genes were up-regulated and 8 genes were down-regulated more than 2 folds in NCI-H446 cells when compared with the control cells after treatment with emodin for 12 hours, while 12 genes were up-regulated and 24 genes were down-regulated after treatment with emodin for 24 hours. These genes were involved in metabolism, signal transduction, transcription regulation, cytoskeleton organization, immune response, transport, protein synthesis, cell cycle control, cell adhesion and RNA processing. The RT-PCR results were consistent with those obtained by the microarray. Conclusions Emodin affects the expression of genes involved in various cellular functions and plays important roles in cell apoptosis, tumor metastasis and chemotherapy-resistance, which suggests emodin might become an effective chemopreventive or chemotherapeutic agent for SCLC.展开更多
文摘目的了解山东省济宁市诺如病毒的分子流行病学特征及诺如病毒的优势基因型,为诺如病毒感染防控提供科学依据。方法按照《山东省病毒性腹泻监测方案》,2018年1月-2020年12月从山东省济宁市每县(市、区)每月采集3~5份病毒性腹泻标本,进行流行病学调查,采用Real time RT-PCR方法检测诺如病毒GI/GⅡ组,对阳性样本进行基因型别鉴定。结果共采集粪便标本1230份,诺如病毒阳性165份(其中GⅠ8份、GⅡ157份),检出率为13.41%(165/1230)。每年除2月份外,其他月份均检出诺如病毒,以6月、7月检出率高。基因型分别为GⅡ.4型25份,占32.05%;GⅡ.2型18份,占23.08%;GⅡ.6型14份,占17.95%;GⅡ.3型13份,占16.67%。3年间优势毒株不同,2018年为GⅡ.3型9份,占69.23%;2019年为GⅡ.2型14份,占43.75%;2020年为GⅡ.4型17份,占53.13%。结论山东省济宁市诺如病毒感染6月和7月流行强度较强,以GⅡ组为主,基因型存在多样性,处于动态变化中,以GⅡ.2[P16]型和GⅡ.4[P31]型为主要型别。
基金The study was supported by a grant from the Key Projects of Science and Technology Agency of Shandong Province,China (No.003100104).
文摘Background The treatment of patients with small cell lung cancer （SCLC） is based on chemotherapy. However, the treatment is limited by the development of drug resistance. Emodin has been shown to exhibit an anti-cancer effect. But the molecular mechanism remains unclear. This study was conducted to investigate the effect of emodin on the gene expression profile changes in SCLC NCI-H446 cells. Methods NCI-H446 cells were treated with emodin and cell viability was determined by MTT assay. Cell apoptosis was determined by both flow cytometry and caspase-3 activity assay. The effect of emodin on the gene expression profile of NCI-H446 cells was analyzed using cDNA microarray. Semi-quantitative reverse transcriptase-polymerase chain reaction （RT-PCR） was used to validate the microarray results. Results Emodin suppressed viability, induced apoptosis and changed cell cycle of NCI-H446 cells. Among the 1262 genes, 10 genes were up-regulated and 8 genes were down-regulated more than 2 folds in NCI-H446 cells when compared with the control cells after treatment with emodin for 12 hours, while 12 genes were up-regulated and 24 genes were down-regulated after treatment with emodin for 24 hours. These genes were involved in metabolism, signal transduction, transcription regulation, cytoskeleton organization, immune response, transport, protein synthesis, cell cycle control, cell adhesion and RNA processing. The RT-PCR results were consistent with those obtained by the microarray. Conclusions Emodin affects the expression of genes involved in various cellular functions and plays important roles in cell apoptosis, tumor metastasis and chemotherapy-resistance, which suggests emodin might become an effective chemopreventive or chemotherapeutic agent for SCLC.
