一个三掩饰的二氧化-cGAMP衍生物作为一个细胞透的刺痛激动剂
Anna-Lena J Halbritter1, Yasmin V Gärtner1, Jahongir Nabiev1
1Department of Chemistry, Institute for Chemical Epigenetics , Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377, Munich, Germany.
Angewandte Chemie (International ed. in English)
|November 12, 2024
概括
研究人员开发了一种新的细胞透性STING激动剂前药. 这种铁保护的循环GMP-AMP (cGAMP) 衍生物显著增强了对潜在抗癌疗法的免疫反应.
科学领域:
- 免疫学 免疫学 免疫学
- 生物化学 生化学
- 药用化学 医学化学
背景情况:
- 2',3'-循环GMP-AMP (cGAMP) 是一个第二信使,激活干扰素基因刺激器 (STING) 途径,对先天免疫至关重要.
- 刺痛激动剂在免疫瘤学中表现有前途,但它们的细胞透性受到负电荷二链接的限制.
- 开发细胞透性STING激动剂对于增强它们的抗癌功效至关重要.
研究的目的:
- 为了设计一种细胞透性STING激动剂,提高抗癌治疗潜力.
- 为了克服循环二核酸STING激动剂的细胞膜透障碍.
主要方法:
- 合成了cGAMP的二氧化衍生物作为三前药物.
- 通过修改硫,掩盖了基骨的负电荷.
- 评估了改性化合物的细胞功效.
主要成果:
- 铁保护的cGAMP衍生物显示细胞功率显著增加.
- 功效从EC50的5μM提高到25nM,这是一个显著的增强.
- 这种修改成功地掩盖了负电荷,改善了细胞的透性.
结论:
- 开发的铁受保护的cGAMP前药是一种高度有效的细胞透性STING激动剂.
- 这种化合物代表了基于STING激动剂的抗癌疗法的有希望的进步.
- 掩盖基电荷的策略为开发有效的免疫疗法提供了一条可行的途径.
更多相关视频
相关概念视频
01:11IP3/DAG Signaling Pathway
11.9K
Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
11.9K
01:09GPCRs Regulate Adenylyl Cylase Activity
5.3K
Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
5.3K