目的建立一种低成本、高效率、操作简便的单核苷酸多态性(SNP)检测技术。方法采用自行设计的"ShineRoar 探针",结合融解曲线技术检测目的基因 SNP。并根据其工作原理分别对肿瘤坏死因子受体Ⅱ(TNFRⅡ)和载脂蛋白 M(apoM)的基...目的建立一种低成本、高效率、操作简便的单核苷酸多态性(SNP)检测技术。方法采用自行设计的"ShineRoar 探针",结合融解曲线技术检测目的基因 SNP。并根据其工作原理分别对肿瘤坏死因子受体Ⅱ(TNFRⅡ)和载脂蛋白 M(apoM)的基因多态性进行检测;同时用 DNA 测序技术鉴定 ShineRoar 探针技术的准确性。结果融解曲线分析结果显示,某一基因的野生型及突变型纯合子分别在2个不同的融解温度出现融解谷。TNFRⅡ基因第6外显子196位突变(ATG→AGG)所产生的 T 和 G 等位基因的融解温度分别为(52.84±0.75)℃和(58.38±0.61)℃;apoM T-778C 突变所产生的 T 和 C 等位基因的融解温度分别为(42.55±0.73)℃和(49.19±0.57)℃。一致性 Kappa 检验显示 ShineRoar 探针技术与 DNA 测序技术的 SNP 检测结果一致(Kappa=1,P=0.000)。结论ShineRoar 探针技术简单、快速、准确,适用于大批量基因分型的研究。展开更多
Waardenburg syndrome typeⅡ（WS2） is associated with syndromic deafness.A subset of WS2,WS2A,accounting for approximately 15%of patients,is attributed to mutations in the microphthalmia-associated transcription facto...Waardenburg syndrome typeⅡ（WS2） is associated with syndromic deafness.A subset of WS2,WS2A,accounting for approximately 15%of patients,is attributed to mutations in the microphthalmia-associated transcription factor（MITF） gene.We examined the genetic basis of WS2 in a large Chinese family.All 9 exons of the MITF gene,the single coding exon（exon 2） of the most common hereditary deafness gene GJB2 and the mitochondrial DNA（mtDNA） 12S rRNA were sequenced.A novel heterozygous mutation c.[742_743delAAinsT;746_747delCA]in exon 8 of the MITF gene co-segregates with WS2 in the family.The MITF mutation results in a premature termination codon and a truncated MITF protein with only 247 of the 419 wild type amino acids.The deaf proband had this MITF gene heterozygous mutation as well as a c.[109G〉A]＋ [235delC]compound heterozygous pathogenic mutation in the GJB2 gene.No pathogenic mutation was found in mtDNA 12S rRNA in this family.Thus,a novel compound heterozygous mutation,c.[742_743delAAinsT;746_747delCA]in MITF exon 8 was the key genetic reason for WS2 in this family,and a digenic effect of MITF and GJB2 genes may contribute to deafness of the proband.展开更多
文摘目的建立一种低成本、高效率、操作简便的单核苷酸多态性(SNP)检测技术。方法采用自行设计的"ShineRoar 探针",结合融解曲线技术检测目的基因 SNP。并根据其工作原理分别对肿瘤坏死因子受体Ⅱ(TNFRⅡ)和载脂蛋白 M(apoM)的基因多态性进行检测;同时用 DNA 测序技术鉴定 ShineRoar 探针技术的准确性。结果融解曲线分析结果显示,某一基因的野生型及突变型纯合子分别在2个不同的融解温度出现融解谷。TNFRⅡ基因第6外显子196位突变(ATG→AGG)所产生的 T 和 G 等位基因的融解温度分别为(52.84±0.75)℃和(58.38±0.61)℃;apoM T-778C 突变所产生的 T 和 C 等位基因的融解温度分别为(42.55±0.73)℃和(49.19±0.57)℃。一致性 Kappa 检验显示 ShineRoar 探针技术与 DNA 测序技术的 SNP 检测结果一致(Kappa=1,P=0.000)。结论ShineRoar 探针技术简单、快速、准确,适用于大批量基因分型的研究。
基金supported by the grants from the National Basic Research Program of China(Nos.2011CB504500, 2011CB504506 and 2010CB945503)the National Basic Research Program of China(No.2011504502)+1 种基金the Shanghai Municipal Commission of Science and Technology Program (No.09DJ140061)the National Natural Science Foundation of China(No.81070793)
文摘Waardenburg syndrome typeⅡ（WS2） is associated with syndromic deafness.A subset of WS2,WS2A,accounting for approximately 15%of patients,is attributed to mutations in the microphthalmia-associated transcription factor（MITF） gene.We examined the genetic basis of WS2 in a large Chinese family.All 9 exons of the MITF gene,the single coding exon（exon 2） of the most common hereditary deafness gene GJB2 and the mitochondrial DNA（mtDNA） 12S rRNA were sequenced.A novel heterozygous mutation c.[742_743delAAinsT;746_747delCA]in exon 8 of the MITF gene co-segregates with WS2 in the family.The MITF mutation results in a premature termination codon and a truncated MITF protein with only 247 of the 419 wild type amino acids.The deaf proband had this MITF gene heterozygous mutation as well as a c.[109G〉A]＋ [235delC]compound heterozygous pathogenic mutation in the GJB2 gene.No pathogenic mutation was found in mtDNA 12S rRNA in this family.Thus,a novel compound heterozygous mutation,c.[742_743delAAinsT;746_747delCA]in MITF exon 8 was the key genetic reason for WS2 in this family,and a digenic effect of MITF and GJB2 genes may contribute to deafness of the proband.
