选择的基化合物在翻译后调节HTRA1的丰度和活性,可能通过在三元体接口的相互作用
John D Hulleman1, Seungje Jeon2, Sofia Bali3,4
1Department of Ophthalmology and Visual Neurosciences, University of Minnesota, 2001 6 St. SE, Minneapolis, Minnesota, 55455, United States.
bioRxiv : the preprint server for biology
|June 4, 2025
概括
高温要求蛋白A1 (HTRA1) 对于眼睛健康至关重要,并与与年龄相关的黄斑退行症 (AMD) 有关. 研究人员选化合物,发现芝加哥天空蓝6B增强HTRA1水平,为AMD提供潜在的治疗途径.
科学领域:
- 分子生物学分子生物学
- 神经科学是一个神经科学.
- 眼科医生 眼科 眼科
背景情况:
- 高温要求蛋白A1 (HTRA1) 是一种涉及神经退行性疾病的血清蛋白酶,包括与年龄相关的黄斑退行 (AMD).
- 遗传研究将含有HTRA1的10q26位点与AMD易感性联系起来,风险等位基因可能会导致视网膜HTRA1合成中的与年龄相关的缺陷.
研究的目的:
- 使用高通量选方法识别增强HTRA1转录或蛋白质水平的小分子.
- 通过针对HTRA1.1来探索AMD的潜在治疗策略.
主要方法:
- 使用CRISPR/Sp.Cas9基因编辑,在ARPE-19细胞中用HiBiT标记HTRA1.
- 研究人员对1920种化合物的库进行了选,以检测它们对HTRA1分泌和细胞内水平的影响.
- 使用了反选,HiBiT涂抹,基于酸酶活性的蛋白质概况 (SH-ABPP) 和计算建模.
主要成果:
- 芝加哥天空蓝6B (CSB),一种基化合物,显著增强HTRA1分泌 (2.0倍) 和细胞内水平 (1.7倍),而不改变转录或酶活性.
- 另一种基化合物 - - 刚果红色 - - 增加了细胞内HTRA1 (3.6倍),但影响了它的酶活性.
- 计算机建模表明CSB和刚果红结合HTRA1的三元体接口.
结论:
- 包括CSB在内的选择性色剂可以作为化学探针来调节HTRA1水平.
- 这些发现确定了开发针对AMD和其他相关疾病的HTRA1的新型小分子疗法的潜在起点.
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