人类的α-B-晶突变会在小鼠中引起氧化还原应激和蛋白质聚合心肌病
Namakkal S Rajasekaran1, Patrice Connell, Elisabeth S Christians
1Center for Cardiovascular Translational Biomedicine, Division of Cardiology, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT 84132, USA.
Cell
|August 19, 2007
概括
在alphaB-crystallin基因的突变导致心脏病. 在小鼠中降低葡萄糖-6-酸盐脱酶 (G6PD) 活性可以预防这种心肌病,这表明G6PD是治疗标.
科学领域:
- 心血管生物学 心血管生物学
- 分子遗传学 分子遗传学
- 生物化学 生物化学
背景情况:
- 阿尔法B晶体基因 (R120G) 的自体主导突变会导致多系统蛋白聚合疾病,包括心肌病.
- 在hR120GCryAB突变体中驱动心肌病的精确机制尚未完全理解.
研究的目的:
- 为了研究hR120GCryAB诱导心肌病的发病因子.
- 为了确定R120GCryAB心肌病的潜在治疗点.
主要方法:
- 产生过基因小鼠过度表达心脏特异的hR120GCryAB.
- 分析心脏组织以寻找减小压力的迹象和谷氨代谢的变化.
- 交叉hR120GCryAB小鼠与具有降低葡萄糖-6-酸脱酶 (G6PD) 水平的小鼠.
主要成果:
- 转基因小鼠表现出反映人类状况的心肌病,并表现出减轻压力的迹象.
- 肌病性心脏显示,由于葡萄糖-6-酸盐脱酶 (G6PD),葡萄糖缩酶和葡萄糖过氧酶的升高,葡萄糖的循环循环增加.
- 在hR120GCryAB小鼠中降低G6PD水平,挽救心脏缩和蛋白质聚合.
结论:
- 在R120GCryAB心肌病症中,G6PD活动的失调对不适应性减轻性压力至关重要.
- 准G6PD活动为R120GCryAB心肌病和人类心力衰竭提供了一个新的治疗策略.
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