在大型多中心样本中的染色体1q上没有检测到主要的精神分裂症位点
Douglas F Levinson1, Peter A Holmans, Claudine Laurent
1Department of Psychiatry, University of Pennsylvania, Philadelphia, PA 19104, USA. dfl@mail.med.upenn.edu
概括
这项研究发现,在一大批家庭中,精神分裂症和染色体1q之间没有显著的遗传联系. 这些发现表明,如果精神分裂症易感基因存在于1q染色体上,它们的影响可能是最小的.
科学领域:
- 遗传学 是一个遗传学.
- 精神病学是一个精神病学.
- 分子生物学分子生物学
背景情况:
- 以前的报道表明,精神分裂症和染色体1q之间存在遗传联系.
- 鉴定精神分裂症的遗传因素对于理解其病因至关重要.
研究的目的:
- 严格评估精神分裂症与1q.染色体的遗传联系.
- 调查不同家族样本的链接信号的潜在异质性.
主要方法:
- 16个DNA标记物的基因定型,跨越了染色体1q的107个厘米.
- 一个多中心样本的分析,包括779个有信息的精神分裂症血统.
- 分层分析包括欧洲血统家庭,衰退遗传模型和多个受影响个体的家庭.
主要成果:
- 没有发现精神分裂症和染色体1q之间存在遗传联系的重要证据.
- 在八个单个样本中,没有检测到代基因共享的显著异质性.
- 亚组分析也未能提供有关联系的重要证据.
结论:
- 对精神分裂症与1q染色体的关联有实质性证据,这项大规模研究并不支持.
- 如果精神分裂症的易感基因位于1q染色体上,它们对疾病的总体贡献可能很小.
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