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 th...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 0.20x10-2-1.02x10-2 per bp.CONCLUSION: Point mutations in the 5' noncoding region of BCL-6gene 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
目的探究轴突蛋白1(neurexin 1,NRXN1)基因在Tourette综合征(Tourette syndrome,TS)患儿中的突变特点。方法纳入524例TS患儿,采集外周血提取DNA,进行NRXN1基因全部外显子靶向测序(target region sequencing)后进行Sanger测序验证,应用DN...目的探究轴突蛋白1(neurexin 1,NRXN1)基因在Tourette综合征(Tourette syndrome,TS)患儿中的突变特点。方法纳入524例TS患儿,采集外周血提取DNA,进行NRXN1基因全部外显子靶向测序(target region sequencing)后进行Sanger测序验证,应用DNAMAN软件、SIFT、PolyPhen2、Mutation Taster、FATHMM和ClinPred对可疑变体的危害性进行生物信息学分析,最后对携带NRXN1基因变体的患儿进行基因型及表型分析。结果13例TS患者携带13个NRXN1基因变体,包括11个点突变及2个缺失突变。其中2个点突变,c.79G>T(p.A27S)和c.58G>T(p.G20C),为新发现的变体,其他9个点突变及2个缺失突变包括c.3523A>G(p.I1175V)、c.4180A>T(p.T1394S)、c.1697A>T(p.H566L)、c.3715G>A(p.A1239T)、c.878A>C(p.N293T)、c.475C>T(p.P159S)、c.320C>T(p.T107M)、c.365A>G(p.Q122R)、c.611T>A(p.L204Q)、c.68_79del(p.G23_G26del)、c.65_79del(p.G22_G26del)。生物信息学分析表明c.58G>T、c.1697A>T、c.475C>T、c.365A>G、c.878A>C、c.79G>T等6种基因变体的危害性可能相对较高。13例患儿中有6例采集到临床表现的信息,该6例患儿有不同部位的抽动,1例伴随强迫症状,1例出现情绪不稳,3例表现易激惹,6例患儿未出现重复语言、注意缺陷、多动障碍、睡眠障碍及抑郁症状的表现。结论TS患儿中检测到NRXN1基因突变位点,拓展了NRXN1突变谱。携带不同基因变体的患儿临床表现不相同,基因型及表型之间的关系需要进一步探索。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 0.20x10-2-1.02x10-2 per bp.CONCLUSION: Point mutations in the 5' noncoding region of BCL-6gene 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。
