基于L-thyroxine和L-thyroxine的抗微生物药物可以对抗Streptococcus pneumoniae和其他格拉姆阳性细菌
Juan José Galano-Frutos1,2,3, Ritwik Maity2,3, Verónica Iguarbe2,3
1Institute of Chemical Sciences and Technologies "Giulio Natta" (SCITEC) - CNR, Largo Francesco Vito 1, 00168, Rome, Italy.
人类激素l-thyroxine及其衍生物对抗耐药细菌具有抗菌性. 这些化合物向细菌的flavodoxins,提供了一个有希望的新类抗微生物药物,具有低毒性.
科学领域:
- 微生物学 微生物学
- 药物发现 药物发现 药物发现
- 生物化学 生物化学
背景情况:
- 抗生素耐药的肺炎菌 (Streptococcus pneumoniae) 是一个重大的全球健康挑战.
- 迫切需要新的抗微生物策略来对抗耐药细菌感染.
研究的目的:
- 为了研究人类激素l-thyroxine的抗菌特性.
- 描述l-thyroxine类似物,并确定它们抗菌功效的结构性决定因素.
- 为了探索l-thyroxine作为潜在的抗菌剂的可用性.
主要方法:
- 人类批准的化合物的高通量选.
- 异热定位热量计 (ITC) 用 *Sp*-flavodoxin.toxin进行测定.
- 在体外对抗微生物敏感性测定对格拉姆阳性和格拉姆阴性细菌.
- 对HepG2细胞的毒性评估.
- 结构-活动关系和计算对接分析.
主要成果:
- L-甲状腺素与*Sp*-flavodoxin结合,具有较低的微分子解离常数 (Kd).
- L-甲状腺素特别抑制了 *Sp* 的生长.
- 某些l-甲状腺素衍生物对*黄金葡萄球菌*和*菌表菌*表现出活性,但对格拉姆阴性细菌没有.
- 在HepG2细胞中没有观察到对l-thyroxine或其衍生物的显著毒性.
结论:
- 针对细菌黄素的L-甲状腺素衍生物代表了一种新且有前途的抗微生物药物类别.
- 这些发现为开发针对抗生素耐药细菌的治疗方法开辟了新的途径.
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