颅内海绵状血管瘤CCM1基因第12外显子及其5′端内含子新突变位点  

New mutations of the 12th exon of CCM1 gene in Chinese patients with intracranial cavernous angiomas

作　　者：谢嵘[1] 陈衔城[1] 樊永峰[2] 任惠民[2] 夏鹰[3] 季耀东[3] 胡军[4] 

机构地区：[1]复旦大学附属华山医院神经外科,上海200040 [2]复旦大学神经病学研究所,上海200040 [3]复旦大学附属金山医院神经外科,上海200040 [4]上海市华东医院神经外科

出　　处：《中华医学遗传学杂志》2004年第3期264-266,共3页Chinese Journal of Medical Genetics

摘　　要：目的　探讨 CCM1基因突变在中国人颅内海绵状血管瘤 ( intracranial cavernous angiomas,ICCA)发病中所起的作用。方法　收集我院神经外科 2 0 0 2年 6月～ 2 0 0 3年 2月收治并经手术病理证实的2 1例 ICCA患者及 15名正常健康对照者 ,从外周静脉血中提取 DNA,PCR法扩增 CCM1基因第 12外显子及其两侧部分内含子序列 ,应用 DNA直接测序技术对扩增产物进行检测。结果　 5例患者中检测出 3处 CCM1基因突变 ,均为首次发现。其中 ,5例患者中均存在 1172 C→ T的错义突变 ,使编码 KRIT1蛋白391位的氨基酸由丝氨酸变成苯丙氨酸。另有 1例患者存在 116 0 A→ C的错义突变 ,使编码 KRIT1蛋白387位氨基酸的谷氨酰胺变成脯氨酸。另一个突变发生在第 12外显子 5′端内含子区域 ,5例患者中有 4例第 4个碱基 C被 T取代。对照组检测结果无异常。结论　中国 ICCA患者存在 CCM1基因第 12外显子的突变 ,并与Objective To study the effect of CCM1 gene mutations in Chinese patients with intracranial cavernous angiomas(ICCA). Methods Twenty-one ICCA patients confirmed by pathology after operations in hospital from June 2002 to Feb.2003 and 15 healthy individuals as contrast were recruited. The peripheral venous blood samples of all the individuals were collected, and then DNA was extracted from the blood samples followed by amplification of exon 12 and some of its intron sequence using PCR. After purification, the PCR products were directly sequenced by ABI PRISM377 sequencing instrument. Results Three mutations of CCM1 gene were found in 5 patients and reported firstly. There existed a missense mutation of 1172C→T in exon 12 in 5 patients, which led the No.391 amino acid of KRIT1 protein, serine, to phenyalanine. There existed a missense mutation of 1160A→C in one patient, which led the No.387 amino acid, glutamine, to proline. Another mutation was an intronic mutation of IVS12-4C→T in 4 patients.In contrast no mutations were found. Conclusion The authors firstly report that mutations of CCM1 gene in exon 12 also exist in Chinese ICCA patients and those mutations are related with the occurring of ICCA.

关 键 词：颅内海绵状血管瘤 CCMI基因 基因突变 神经外科 

分 类 号：R739.4[医药卫生—肿瘤]