伦卡西瓜特通过必要的基因激活可溶性甘烯酸环酶,这对于血红素结合和氧化激活至关重要
Theresa Wittrien1, Anne Rühle1, Christin Elgert1
1Department of Pharmacology, Toxicology and Clinical Pharmacy, University of Braunschweig - Institute of Technology, Germany.
Biochemical pharmacology
|January 6, 2025
概括
像runcaciguat这样的第二代可溶性瓜尼利环酶 (sGC) 激活剂,需要histidine 105来激活,与早期的药物不同. 这一发现需要重新评估使用histidine突变体的sGC研究和药物开发.
科学领域:
- 药理学和生物化学 药理学和生物化学
- 心血管研究研究心血管研究
- 药物发现和开发 药物发现和开发
背景情况:
- 溶性甘基环酶 (sGC) 是心血管疾病的关键点,包括肺高血压和心力衰竭.
- 在sGC的血口袋中存在的105 (H105) 胺对于氧化物 (NO) 介导的激活至关重要.
- 没有血红素的sGC突变 (H105F,H105A) 曾被用于研究NO独立激活剂.
研究的目的:
- 通过不同代的sGC激活剂来研究histidine 105在sGC激活中的作用.
- 在药物查中重新评估无血红蛋白sGC胺突变物的实用性.
- 根据其作用机制,提出SGC激活剂的新分类.
主要方法:
- 使用野生型和H105突变sGC (α1/β1) 与各种sGC激活剂 (cinaciguat,BAY 60-2770,runcaciguat,BAY 543) 的酶活性测定.
- 在体内验证使用β1 H105F用runcaciguat治疗的试验小鼠.
- 对第一代和第二代sGC激活剂对依赖histidine和独立sGC变体的疗效进行比较分析.
主要成果:
- 第一代激活剂 (cinaciguat,BAY 60-2770) 激活了野生类型和H105突变的sGC.
- 第二代激活剂 (runcaciguat,BAY 543) 选择性激活野生类型的sGC,需要β1 H105残留物.
- 在体内研究证实了在β1 H105F敲进小鼠中runcaciguat激活的依赖histidine.
结论:
- 建议对sGC激活剂进行新型分类:依赖histidine的 (runcaciguat,BAY 543) 和依赖histidine的 (cinaciguat,BAY 60-2770,BI703704).
- 某些sGC激活剂的胺依赖性需要重新评估使用sGC胺突变体的先前研究.
- 这种新分类的治疗影响需要进一步研究.
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