目的分析中国大陆地区2004-2016年柯萨奇病毒A组10型(coxsackievirus group A type 10,CA10)流行毒株基因型分布概况和进化规律,为手足口病防控提供数据支撑。方法利用MEGA 6.0软件对GenBank核酸数据库收录的流行于中国大陆地区的CA10毒...目的分析中国大陆地区2004-2016年柯萨奇病毒A组10型(coxsackievirus group A type 10,CA10)流行毒株基因型分布概况和进化规律,为手足口病防控提供数据支撑。方法利用MEGA 6.0软件对GenBank核酸数据库收录的流行于中国大陆地区的CA10毒株VP1区基因序列进行分析,构建系统进化树,并对毒株彼此间的核苷酸和氨基酸同源性进行计算。结果纳入本研究的中国大陆地区CA10毒株共计218株,中国大陆地区CA10流行毒株的基因型以C型为主。与原型株CA10-Kowalik相比,中国大陆地区CA10毒株核苷酸和氨基酸的同源性分别为69.4%~73.9%和90.6%~93.6%;中国大陆地区CA10毒株内部的核苷酸和氨基酸同源性分别为76.4%~100.0%和92.9%~100.0%。结论本研究提示应针对CA10毒株流行趋势和基因型分布情况,采取有效措施防控手足口病。展开更多
AIM: In hepatocellular carcinoma (HCC) prevalent areas of China, the point mutation of p53 exon7 is highly correlated with Hepatitis B virus(HBV) infection and aflatoxin B intake. While in non-HCC-prevalent areas of C...AIM: In hepatocellular carcinoma (HCC) prevalent areas of China, the point mutation of p53 exon7 is highly correlated with Hepatitis B virus(HBV) infection and aflatoxin B intake. While in non-HCC-prevalent areas of China, these factors are not so important in the etiology of HCC. Therefore, the point mutation of p53 exon7 may also be different than that in HCC-prevalent areas of China. The aim of this study is to investigate the status and carcinogenic role of the point mutation of p53 gene exon7 in hepatocellular carcinoma from Anhui Province, a non-HCC-prevalent area in China. METHODS: PCR PCR-SSCP and PCR-RFLP were applied to analyze the homozygous deletion and point mutation of p53 exon7 in HCC samples from Anhui, which were confirmed by DNA sequencing and Genbank comparison. RESULTS: In the 38 samples of hepatocellular carcinoma, no homozygous deletion of p53 exon7 was detected and point mutations of p53 exon7 were found in 4 cases, which were found to be heterozygous mutation of codon 249 with a mutation rate of 10.53%(4/38). The third base mutation(G-T) of p53 codon 249 was found by DNA sequencing and Genbank comparison. CONCLUSION: The incidence of point mutation of p53 codon 249 is lower in hepatocellular carcinoma and the heterozygous mutation of p53 exon7 found in these patients only indicate that they have genetic susceptibility to HCC. p53 codon 249 is a hotspot of p53 exon7 point mutation, suggesting that the point mutation of p53 exon 7 may not play a major role in the carcinogenesis of HCC in Anhui Province, a non-HCC-prevalent area in China.展开更多
目的:鉴定凡纳滨对虾分子质量40 k D过敏原,并分析其在有壳水产食物中的免疫交叉反应。方法:运用基质辅助激光解析串联飞行时间质谱仪(matrix assisted laser desorption ionization/time of flight mass spectrometry,MALDI-TOF/TOF-MS...目的:鉴定凡纳滨对虾分子质量40 k D过敏原,并分析其在有壳水产食物中的免疫交叉反应。方法:运用基质辅助激光解析串联飞行时间质谱仪(matrix assisted laser desorption ionization/time of flight mass spectrometry,MALDI-TOF/TOF-MS)鉴定凡纳滨对虾40 k D过敏原组分;使用软件BLAST、Clustal X2、MEGA 5.0分析该蛋白氨基酸序列的种间同源性;制备抗凡纳滨对虾过敏原精氨酸激酶的多克隆抗体,并与17种常见有壳水生动物粗提液进行Western blotting,以分析该过敏原的免疫交叉反应。结果:凡纳滨对虾40 k D过敏原为精氨酸激酶(arginine kinase,AK);其氨基酸序列同源性分析显示AK在虾类(96%~100%)、蟹类(91%~93%)、贝类(49%~52%)、蟑螂(83%)中具有很高的同源性;Western blotting结果显示抗AK多抗与17种不同虾类、蟹类、贝类的AK均能发生反应。结论:精氨酸激酶在甲壳类动物、软体动物、甚至昆虫中具有高度保守性,且能引起强免疫交叉反应,是有壳水生动物中的一种泛过敏原。展开更多
文摘目的分析中国大陆地区2004-2016年柯萨奇病毒A组10型(coxsackievirus group A type 10,CA10)流行毒株基因型分布概况和进化规律,为手足口病防控提供数据支撑。方法利用MEGA 6.0软件对GenBank核酸数据库收录的流行于中国大陆地区的CA10毒株VP1区基因序列进行分析,构建系统进化树,并对毒株彼此间的核苷酸和氨基酸同源性进行计算。结果纳入本研究的中国大陆地区CA10毒株共计218株,中国大陆地区CA10流行毒株的基因型以C型为主。与原型株CA10-Kowalik相比,中国大陆地区CA10毒株核苷酸和氨基酸的同源性分别为69.4%~73.9%和90.6%~93.6%;中国大陆地区CA10毒株内部的核苷酸和氨基酸同源性分别为76.4%~100.0%和92.9%~100.0%。结论本研究提示应针对CA10毒株流行趋势和基因型分布情况,采取有效措施防控手足口病。
基金the Natural Science Foundation of Anhui Province,No.99044312(WY) and No.9741006(LX)Natural Science Foundation of Anhui Educational Commission,No.JL-97-077(WY).
文摘AIM: In hepatocellular carcinoma (HCC) prevalent areas of China, the point mutation of p53 exon7 is highly correlated with Hepatitis B virus(HBV) infection and aflatoxin B intake. While in non-HCC-prevalent areas of China, these factors are not so important in the etiology of HCC. Therefore, the point mutation of p53 exon7 may also be different than that in HCC-prevalent areas of China. The aim of this study is to investigate the status and carcinogenic role of the point mutation of p53 gene exon7 in hepatocellular carcinoma from Anhui Province, a non-HCC-prevalent area in China. METHODS: PCR PCR-SSCP and PCR-RFLP were applied to analyze the homozygous deletion and point mutation of p53 exon7 in HCC samples from Anhui, which were confirmed by DNA sequencing and Genbank comparison. RESULTS: In the 38 samples of hepatocellular carcinoma, no homozygous deletion of p53 exon7 was detected and point mutations of p53 exon7 were found in 4 cases, which were found to be heterozygous mutation of codon 249 with a mutation rate of 10.53%(4/38). The third base mutation(G-T) of p53 codon 249 was found by DNA sequencing and Genbank comparison. CONCLUSION: The incidence of point mutation of p53 codon 249 is lower in hepatocellular carcinoma and the heterozygous mutation of p53 exon7 found in these patients only indicate that they have genetic susceptibility to HCC. p53 codon 249 is a hotspot of p53 exon7 point mutation, suggesting that the point mutation of p53 exon 7 may not play a major role in the carcinogenesis of HCC in Anhui Province, a non-HCC-prevalent area in China.
文摘目的:鉴定凡纳滨对虾分子质量40 k D过敏原,并分析其在有壳水产食物中的免疫交叉反应。方法:运用基质辅助激光解析串联飞行时间质谱仪(matrix assisted laser desorption ionization/time of flight mass spectrometry,MALDI-TOF/TOF-MS)鉴定凡纳滨对虾40 k D过敏原组分;使用软件BLAST、Clustal X2、MEGA 5.0分析该蛋白氨基酸序列的种间同源性;制备抗凡纳滨对虾过敏原精氨酸激酶的多克隆抗体,并与17种常见有壳水生动物粗提液进行Western blotting,以分析该过敏原的免疫交叉反应。结果:凡纳滨对虾40 k D过敏原为精氨酸激酶(arginine kinase,AK);其氨基酸序列同源性分析显示AK在虾类(96%~100%)、蟹类(91%~93%)、贝类(49%~52%)、蟑螂(83%)中具有很高的同源性;Western blotting结果显示抗AK多抗与17种不同虾类、蟹类、贝类的AK均能发生反应。结论:精氨酸激酶在甲壳类动物、软体动物、甚至昆虫中具有高度保守性,且能引起强免疫交叉反应,是有壳水生动物中的一种泛过敏原。
