摘要
为了探讨癌细胞 ｍｔ Ｄ Ｎ Ａ 控制区序列的变化特征， 采用 Ｐ Ｃ Ｒ 产物限制性片段长度多态性（ Ｐ Ｃ Ｒ－ Ｒ Ｆ Ｌ Ｐ） 分析与直接测序相结合的方法， 对比分析６ 株人癌细胞系、６ 例癌患者及４ 例健康成人白细胞ｍｔ Ｄ Ｎ Ａ 控制区序列。发现第１６５１９ 位 Ｔ→ Ｃ、１６ ５３４ 位 Ａ→ Ｇ、４６ 位 Ｔ→ Ｇ 和４９ 位 Ａ→ Ｃ 突变，在癌细胞系和癌患者白细胞ｍｔ Ｄ Ｎ Ａ 中分别占５０ ％ （３／６） 和３３３ ％ （２／６） ， 健康成人白细胞ｍｔ Ｄ Ｎ Ａ 中未见此类型突变； 第１６ ２７８ 位 Ｃ→ Ｔ 突变， 在癌细胞系 ｍｔ Ｄ Ｎ Ａ 中占５０ ％ （３／６） ， 显著高于正常人群ｍｔ Ｄ Ｎ Ａ 中此位点的多态性变异。表明癌细胞和癌患者白细胞 ｍｔ Ｄ Ｎ Ａ 重链复制起点及其 相邻 Ｄ 环区的特征性突变可能与细胞癌变／ 或癌的易感性有关。
To explore the sequence feature of mitochondrial DNA(mtDNA) control region in human carcinoma cells, polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP) and direct sequence techniques were used to analyze the sequence of mtDNA control region of 6 human carcinoma cell lines versus white blood cells which from 6 tumor patients and 4 normal adults The T to C mutation at np 16 519, A to G mutation at np 16 534, T to G mutation at np 46, and A to C mutation at np 49 was found in 50% (3/6 cases) of carcinoma cell lines and in 33 3%(2/6 cases) of tumor patients, but it was not found in normal adults The C to T mutation at np 16 278 was found in 50%(3/6 cases) of carcinoma cell lines, it was significantly higher than that of the polymorphism of normal population These findings suggest that the typical mutation in the starting area of heavy-strand replication and the first half of D-loop region might probably be associated with carcinogenesis or susceptibility of carcinoma
出处
《遗传》
CAS
CSCD
北大核心
1999年第4期1-5,共5页
Hereditas（Beijing)
基金
国家自然科学基金
关键词
人癌细胞系
线粒体DNA
控制区
核苷酸序列
突变
Human carcinoma cell line
mtDNA
Control region
Nucleotide sequence
Mutation
