AIM: To investigate the mutations of the 5' noncoding region of BCL-6 gene in Chinese patients with primary gastric lymphomas. METHODS: PCR and direct DNA sequencing were used to identify BCL-6 gene mutations in t...AIM: To investigate the mutations of the 5' noncoding region of BCL-6 gene in Chinese patients with primary gastric lymphomas. METHODS: PCR and direct DNA sequencing were used to identify BCL-6 gene mutations in the 5' noncoding region in 29 cases of gastric diffuse large B-cell lymphoma (DLBCL) and 18 cases of gastric mucosa-associated lymphoid tissue (MALT) lymphoma as well as 10 cases of reactive hyperplasia of lymph node (LRH). RESULTS: Six of 29 gastric DLBCLs (20.7%), 4 of 18 gastric MALT lymphomas (22.2%) and 1 of 10 LRHs(10%) were found to have mutations. All mutations were single-base substitutions and the frequency of single-base changes was 0.20×1O^(-2)-1.02×1O^(-2)per bp. CONCLUSION: Point mutations in the 5' noncoding region of BCL-6 gene are found in Chinese patients with primary gastric DLBCLs and MALT lymphomas, suggesting that they may, in some extent, participate in the pathogenesis of primary gastric DLBCLs and MALT lymphomas.展开更多
目的:了解我国利福平敏感结核杆菌rpoB基因利福平耐药决定区(rifampicin resistancedetermining region,RRDR)序列的多态性特征。方法:采用"rpoB AND Mycobacterium tuberculosis AND(China OR Hong Kong OR Macon OR Taiwan)"...目的:了解我国利福平敏感结核杆菌rpoB基因利福平耐药决定区(rifampicin resistancedetermining region,RRDR)序列的多态性特征。方法:采用"rpoB AND Mycobacterium tuberculosis AND(China OR Hong Kong OR Macon OR Taiwan)"检索策略在Pubmed数据库中检索文献,循证分析Pubmed数据库中截止至2013年4月30日有关我国结核杆菌rpoB基因突变分子特征的研究文献。结果:36篇文献纳入研究,5 136株利福平敏感结核杆菌rpoB基因RRDR序列信息得以分析,38株(0.74%)rpoB基因RRDR序列呈现基因突变,涉及8个位点,分别为511(11株)、533(7株)、531(6株)、526(5株)、516(4株)、518(2株)、519(2株)、521(2株)等,其中1株涉及511/526双位点。结论:我国结核杆菌rpoB基因RRDR序列存在沉默突变现象,并非所有RRDR序列改变均与结核杆菌利福平药物敏感性有关。展开更多
基金Supported by National Natural Science Foundation of China,No.39900065
文摘AIM: To investigate the mutations of the 5' noncoding region of BCL-6 gene in Chinese patients with primary gastric lymphomas. METHODS: PCR and direct DNA sequencing were used to identify BCL-6 gene mutations in the 5' noncoding region in 29 cases of gastric diffuse large B-cell lymphoma (DLBCL) and 18 cases of gastric mucosa-associated lymphoid tissue (MALT) lymphoma as well as 10 cases of reactive hyperplasia of lymph node (LRH). RESULTS: Six of 29 gastric DLBCLs (20.7%), 4 of 18 gastric MALT lymphomas (22.2%) and 1 of 10 LRHs(10%) were found to have mutations. All mutations were single-base substitutions and the frequency of single-base changes was 0.20×1O^(-2)-1.02×1O^(-2)per bp. CONCLUSION: Point mutations in the 5' noncoding region of BCL-6 gene are found in Chinese patients with primary gastric DLBCLs and MALT lymphomas, suggesting that they may, in some extent, participate in the pathogenesis of primary gastric DLBCLs and MALT lymphomas.
文摘目的:了解我国利福平敏感结核杆菌rpoB基因利福平耐药决定区(rifampicin resistancedetermining region,RRDR)序列的多态性特征。方法:采用"rpoB AND Mycobacterium tuberculosis AND(China OR Hong Kong OR Macon OR Taiwan)"检索策略在Pubmed数据库中检索文献,循证分析Pubmed数据库中截止至2013年4月30日有关我国结核杆菌rpoB基因突变分子特征的研究文献。结果:36篇文献纳入研究,5 136株利福平敏感结核杆菌rpoB基因RRDR序列信息得以分析,38株(0.74%)rpoB基因RRDR序列呈现基因突变,涉及8个位点,分别为511(11株)、533(7株)、531(6株)、526(5株)、516(4株)、518(2株)、519(2株)、521(2株)等,其中1株涉及511/526双位点。结论:我国结核杆菌rpoB基因RRDR序列存在沉默突变现象,并非所有RRDR序列改变均与结核杆菌利福平药物敏感性有关。
