对人类基因表达的全基因组变异进行遗传分析
Michael Morley1, Cliona M Molony, Teresa M Weber
1Department of Pediatrics, University of Pennsylvania, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA.
Nature
|July 23, 2004
概括
遗传因素显著影响人类基因表达变异. 这项研究利用大家庭的全基因组链接分析绘制了1000多种表达表现型的遗传决定因素.
科学领域:
- 遗传学 是一个遗传学.
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- 基因表达的自然变异是人类的一个显著的遗传性特征.
- 了解基因表达变异的遗传基础对于人类遗传学研究至关重要.
研究的目的:
- 确定控制人类定量基因表达特征 (表达表现型) 的遗传决定因素 (位置).
- 为了绘制这些遗传调节者的染色体位置.
主要方法:
- 利用微阵列技术测量3,554个基因的基因表达水平.
- 在14个大家族中进行了全基因组链接分析,以确定与表达表现型相关的遗传位置.
主要成果:
- 对于大约1000个不同的表达表现型,发现了显著的联系证据.
- 确定了 cis 和 trans 作用的调节位点,其中 trans 作用的位点更为普遍.
- 发现了多个表达表现型聚合的监管热点,表明共享的遗传控制.
- 观察到相同调节区域内的基因表达水平的显著相关性.
结论:
- 该研究成功地绘制了影响人类基因表达变异的遗传决定因素.
- 基于微阵列的表型化与链接分析相结合,对基因表达调节者的基因映射有效.
- 基因表达受到多种遗传因素的控制,它们通常在变态中起作用,并聚集在监管热点中.
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