甲基化C5赋予了可访问性,稳定性和选择性的皮克罗毒素
Guanghu Tong1, Samantha Griffin2, Avery Sader2
1Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California, 92037, USA.
Nature communications
|December 14, 2023
概括
引入具有对昆虫而不是哺乳动物离子通道增强选择性的新型皮克素 (PXN) 类似物. 这些通过先进合成实现的发现为有针对性的害虫控制策略提供了新的途径.
科学领域:
- 药用化学 医学化学
- 神经科学是一个神经科学.
- 合成有机化学 合成有机化学
背景情况:
- 皮克素 (PXN) 是一种已知的影响离子通道的神经毒素.
- 由于合成复杂性,对于PXN存在有限的结构-活性关系 (SAR) 研究.
- 总合成的进步使PXN类似物的新探索成为可能.
研究的目的:
- 探索用于选择性准哺乳动物与昆虫离子通道的PXN类似物.
- 通过利用现代合成技术,对PXN进行第一个SAR研究.
- 为了识别PXN修改,提高选择性无脊椎动物GABA-gated化物通道 (RDL) 超过脊椎动物GABAA受体.
主要方法:
- 合成两个平行系列的PXN类似物.
- 研究结构变化的影响,特别是C5甲基化对PXN特性的影响.
- 评估类似物对哺乳动物GABAA和无脊椎动物RDL受体的功能活性.
主要成果:
- 一个C5甲基显著稳定PXN,防止二次水解和增加血半衰期.
- C5甲基化降低了对哺乳动物GABAA受体的功效,但维持或增强了对无脊椎动物RDL受体的活性.
- 最佳的5-甲基PXN类似物改变GABAARs中的结合姿势,破坏结网络.
结论:
- 甲基组C5对于提高哺乳动物和昆虫离子通道之间的选择性至关重要.
- 这些发现代表了第一项SAR研究,以确定改善GABAA-RDL选择性指数的PXN修饰.
- 五甲基PXN类型的合成可访问性促进了进一步的研究和开发.
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