凯类固醇抗生素细胞选择性的起源
Bangwei Ding1, Ning Yin, Yang Liu
1Contribution from the Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA.
Journal of the American Chemical Society
|October 21, 2004
概括
阴性类固醇抗生素对格拉姆阴性细菌比其他细胞具有很高的选择性. 它们对脂质A的亲和力有助于这种关键特征的潜在临床用途.
科学领域:
- 微生物学 微生物学
- 药用化学 医学化学
- 生物化学 生物化学
背景情况:
- 细胞选择性对于膜活性抗生素来说至关重要,以向原核生物而不是真核生物.
- 阴阳性类固醇抗生素 (CSA) 的设计是为了模仿多素B的脂质A结合.
- 脂质A是格兰阴性细菌外膜的主要组成部分.
研究的目的:
- 为了评估皮质类固醇抗生素的细胞选择性.
- 为了研究脂质A亲和力在CSA选择性中的作用.
主要方法:
- 开发模仿多素B的脂质A结合的CSAs.
- 亲和度测试比较CSA和聚素B与脂质A衍生物的结合.
- 使用光附加的CSA来评估不同细胞类型 (阴性,阳性,真核) 的膜选择性.
主要成果:
- CSAs对脂质A衍生物的结合亲和力比polymyxin B.的结合亲和力更高.
- 一种被光素标记的CSA对格兰负细菌膜表现出显著的选择性.
- 这种选择性扩展到对格拉姆阳性细菌和真核细胞膜的差异化.
结论:
- 阴性类固醇抗生素对格兰负细菌具有很高的选择性.
- 观察到的细胞选择性可能是由化合物对脂质A的强烈亲和力介导的.
- 由于其有针对性的作用,CSA代表了一类有前途的抗生素,具有潜在的临床实用性.
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