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一个用于小鼠粉红眼稀释位和人类II型眼皮白化病的基因
E M Rinchik1, S J Bultman, B Horsthemke
1Biology Division, Oak Ridge National Laboratory, Tennessee 37831.
Nature
|January 7, 1993
概括
P基因是小鼠粉红眼稀释 (p) 基因的人类同类,被确定为一个完整的膜载体. 它的表达变化与色素相关,突变与普拉德-威利综合征和安吉尔曼综合征的眼皮白化和低色素化有关.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 皮肤病学 皮肤病学
背景情况:
- 鼠标的粉红眼稀释 (p) 位点通过影响eumelanin生产和黑色素体形态来影响皮肤,眼睛和毛皮色素.
- 鼠标p基因的突变减少了黑棕色素 (eumelanin),对黄红色素 (pheomelanin) 的影响很小.
研究的目的:
- 确定小鼠p基因的人类同类,并研究其在色素和相关疾病中的作用.
- 在小鼠模型和人类遗传条件中分析已识别的人类P基因的表达模式.
主要方法:
- 人类补充DNA (DN10) 用于识别人类P基因,是小鼠p基因的同类.
- 基因表达模式和信使RNA (mRNA) 尺寸在各种老鼠突变和回归者中进行了分析.
- 绘制了人类P基因的染色体位置,并研究了它与人类遗传综合征的关联.
主要成果:
- 人类P基因被确定为一个完整的膜载体,其表达模式与小鼠色素表现型相关.
- 在一个特定的老鼠突变体 (p(un)) 中检测到一个异常大小的mRNA,该突变体在复原体中正常化.
- 人类P基因位于15q11-q13染色体段,在普拉德-威利综合征和安吉尔曼综合征中被删除的区域,在眼皮白化病例中发现了突变.
结论:
- 人类P基因是色素的关键调节者,类似于小鼠p基因.
- 删除或P基因突变与与普拉德-威利症候群,安吉尔曼综合征和眼皮白化相关的低颜色发生有关.
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