14螺旋抗微生物β-的结构-活性研究:探讨构造稳定性和抗微生物功效之间的关系
Tami L Raguse1, Emilie A Porter, Bernard Weisblum
1Department of Chemistry and Department of Pharmacology, University of Wisconsin, Madison 53706, USA.
Journal of the American Chemical Society
|October 24, 2002
概括
具有不同螺旋稳定的β-具有与细菌相比较的抗微生物活性. 虽然螺旋倾向影响溶血活性,但这些β为研究宿主防御中的结构-活性关系提供了一个独特的平台.
科学领域:
- 生物化学 生物化学
- 药用化学 医学化学
- 酸科学 酸科学
背景情况:
- 抗菌性α螺旋对宿主防御和对抗生素耐药细菌的潜在疗法至关重要.
- 能够形成稳定的14-螺旋环的β-已经显示出抗菌活性,这促使进一步研究它们的结构-活性关系.
研究的目的:
- 合成和评估具有调节的14-螺旋稳定性的阴离子β-.
- 研究14-螺旋稳定性对抗微生物和溶血活性的影响.
- 探索β-在剖析形状稳定性和生物功能之间的关系中的实用性.
主要方法:
- 设计和合成两个系列的9和10残留的阴离子双胞胎β-.
- 调节14-螺旋稳定性,通过改变刚性跨-2-氨基氨基环素碳酸 (ACHC) 和柔性非循环残留物的比率.
- 循环二极化谱法用于评估水性缓冲体中的14-螺旋体群.
- 针对四种细菌菌株的抗菌试验和血液溶解试验.
主要成果:
- 在水溶液中观察到广泛的14-螺旋体种群,但螺旋体倾向与抗菌活性没有显著相关.
- 几种9-残留β-呈现出与合成magainin衍生物相比的抗菌活性.
- 血液溶解活性随着14-螺旋倾向的增强而略有增加,但所有测试的9-mers都比magainin衍生物更少的血液溶解.
结论:
- 贝塔提供了一种多功能系统,可以在水溶液中实现广泛的螺旋稳定性,与传统的α不同.
- 这项研究表明,β-螺旋稳定性的显著变化不一定转化为抗菌效率的变化.
- β-作为一种有价值的工具,用于阐明抗微生物药物的结构动态和生物活性之间的复杂相互作用.
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