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将家族胸前动脉动脉瘤和剖析 (TAAD2) 的位置映射到3p24-25的位置
Sumera N Hasham1, Marcia C Willing, Dong-chuan Guo
1Department of Internal Medicine, University of Texas Medical School at Houston, USA.
Circulation
|June 25, 2003
概括
研究人员在染色体3p24-25上发现了一个新的基因位点,TAAD2,与家族胸前大动脉动脉瘤和解剖 (TAAD) 有关. 这一发现促进了对这种危及生命的疾病的理解,并有助于在症状前诊断.
科学领域:
- 遗传学 遗传学 是一个
- 心血管医学 心血管医学
- 医学研究 医学研究
背景情况:
- 亲属胸前动脉动脉瘤和剖析 (TAAD) 可以独立于已知的综合征,如马尔凡综合征.
- 之前的研究已经确定了与家族性TAAD相关的两个遗传位置 (TAAD1和FAA1).
- 由于TAAD病例与已确定的位置无关,因此怀疑遗传异质性.
研究的目的:
- 为了确定负责非综合征性家族TAAD的新型遗传基因位点.
- 为了研究TAAD在一个家族的遗传基因,具有自体主导遗传模式.
- 为改善TAAD的诊断和病因学理解做出贡献.
主要方法:
- 在一个四代家族中进行了全基因组扫描,该家族表现出TAAD的主导遗传.
- 受影响的个体是基于大动脉扩张,手术史,或死于大动脉剖析.
- 在启动全基因组扫描之前,已知的家族TAAD位点被排除在外.
主要成果:
- 对非综合征性TAAD的新型位点被映射到染色体3p24-25上的25cM区域.
- 这个新位置的最大几率 (LOD) 多点对数得分达到4.28.
- 这种新发现的位置被指定为TAAD2.2.
结论:
- 在染色体3p24-25上发现了非综合征性TAAD的第三个位点,称为TAAD2.
- TAAD2位点与与马凡综合征相关的MFS2位点重叠.
- 鉴定TAAD2基因可能使得预症状诊断和阐明TAAD的发病因子.
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