选择性STING协同效应剂的设计,合成和生物评估,可增强cGAMP-STING通路激活,没有固有的激进分子活动
Shi Hou1, Jiajia Chang1, Cheng Xing1
1State Key Laboratory of National Security Specially Needed Medicines, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China.
研究人员开发了新的STING协同剂,以选择性地提高对癌症的先天免疫力. 化合物67表现出强大的抗瘤作用,具有出色的安全性和药理动力学,为癌症免疫治疗提供治疗潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 药用化学 医学化学
背景情况:
- 循环GMP-AMP合成酶 (cGAS) 刺激干扰素基因 (STING) 途径对于先天免疫和抗瘤反应至关重要.
- 对患病组织的选择性向仍然是开发STING激动剂的挑战,限制了治疗应用.
- 目前的策略在区分健康和患病组织方面遇到了困难,需要新的方法.
研究的目的:
- 开发新的STING协同剂,可以选择性地准STING C终端域 (CTD) 的口袋.
- 增强cGAS-STING通路激活的协同作用,没有固有的激素活性.
- 为了确定癌症免疫疗法的强效和安全的STING协同剂.
主要方法:
- 设计和合成针对STING-CTD口袋的新型STING协同剂.
- 对cGAMP-STING通路激活的协同效应的评估.
- 通过对化合物12B的逆优化进行结构-活性关系研究.
- 在体外和体内对抗瘤疗效,安全性概况和药理动学的评估.
主要成果:
- 化合物12B证明了对cGAMP-STING通路的协同增强.
- 化合物55,66和67被确定为选择性的STING协同剂,放大cGAMP诱导的激活.
- 化合物67表现出高强度 (EC50 = 20.53μM),在STING-CTD等位基因中具有广泛的结合亲和力,并且在体内具有显著的抗瘤功效.
- 化合物67在体外和体外模型中显示出良好的安全性和药理动力学特征.
结论:
- 成功开发了针对STING-CTD口袋的新型STING协同剂.
- 化合物67是癌症免疫治疗的有希望的治疗候选者,因为它具有强度,选择性,安全性和药理动力学特性.
- 这些发现强调了STING协同剂在增强抗瘤免疫力的潜力,并要求进行进一步的临床研究.
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