具有PDE稳定的2'3'-cGAMP类似物,含有5'-S-基结,作为STING激动剂
Simpa K Yeboah1,2, Herman O Sintim1,2,3
1Department of Chemistry 560 Oval Drive West Lafayette Indiana 47907-2084 USA.
RSC medicinal chemistry
|May 24, 2024
概括
针对STING (干扰素基因刺激剂) 的新型循环二核酸相似物为癌症免疫治疗提供了增强的稳定性. 这些内分-S-酸化合物避免了二聚体问题,并保持了免疫刺激活性.
科学领域:
- 免疫学 免疫学 免疫学
- 药用化学 医学化学
- 生物化学 生物化学
背景情况:
- 干扰素基因刺激剂 (STING) 是癌症免疫疗法的关键标.
- 像2'3'-cGAMP这样的天然STING激动剂是不稳定的 *in vivo* 由于酶降解.
- 目前临床的STING激动剂使用exo-S-phosphorothioate修饰,导致二聚体分离的挑战.
研究的目的:
- 设计和合成具有改善水解稳定性的新型2'3'-cGAMP类似物.
- 制造STING激动剂,以避免合成期间的二聚体形成.
- 为了评估endo-S-phosphorothioate类似物的稳定性和STING激活潜力.
主要方法:
- 设计和合成5'-endo-phosphorothioate替代的2'3'cGAMP类似物.
- 对乙核酸化酶I (ENPP1) 和毒素病毒免疫核酶 (毒素) 的水解稳定性的评估.
- 在THP1单细胞中评估STING-TBK1-IRF通路的激活.
主要成果:
- 成功合成了新型的5'-endo-phosphorothioate 2'3'cGAMP类似物.成功合成了新的5'-endo-phosphorothioate 2'3'cGAMP类似物.
- 这些类似物显示出对ENPP1和毒素的水解稳定性.
- 这些化合物保留了STING-TBK1-IRF激活,与临床候选ADU-S100.相比.
结论:
- 5'-内二酸盐替代提供了一个可行的策略,用于创建稳定的STING激动剂.
- 这种方法绕过了与外S-酸酸盐相关的二聚体分离问题.
- 这些新型类似物代表了开发下一代癌症免疫疗法的有希望的候选者.
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