通过亚抑制性抗生素暴露来对Streptococcus pyogenes毒性的分子重编程
Amrita Bhagwat1, Sunil D Saroj2
1Symbiosis School of Biological Sciences (SSBS),, Symbiosis International (Deemed University) (SIU), Lavale, Pune, 412115, Maharashtra, India.
Molecular biology reports
|January 27, 2026
概括
细胞壁活性抗生素 (CWA) 的亚抑制度可以意外地增强Streptococcus pyogenes的毒性,促进免疫逃避和持久性. 这表明CWA可能无意中导致侵袭性疾病,超出其直接的抗菌作用.
科学领域:
- 微生物学 微生物学
- 病变的发生和发病.
- 抗生素耐药性 抗生素耐药性
背景情况:
- 细菌在体内和环境中会遇到低抑制的抗生素度.
- 这些次抑制水平可以作为调节信号,影响细菌的行为.
- 杆菌pyogenes的发病过程涉及复杂的毒性调节和应激反应.
研究的目的:
- 为了研究亚抑制性细胞壁活性 (CWA) 抗生素对Streptococcus pyogenes毒性的影响.
- 了解CWA抗生素如何调节S. pyogenes中的毒性因子和应激反应.
- 评估CWA抗生素对S. pyogenes病原性的临床相关性.
主要方法:
- 对S. pyogenes暴露于青素,细素和胆固醇的低于最低抑制度 (MIC) 的情况.
- 对囊形成,生物膜发育和巨细胞相互作用的表型评估.
- 对毒性基因 (speB, slo, hasA) 和氧化应激基因 (sodA, ahpC, gpo) 的转录分析.
- 使用小鼠巨细胞的粘附和入侵测定.
- 检查氨酸/氨酸激酶 (stk) 和氧化应激调节器 (spx) 的活性.
主要成果:
- 亚MIC CWA 抗生素显著改变了囊形成并增强了生物膜发育.
- 观察到巨细胞的粘附和入侵增加,这表明免疫逃避.
- 检测到病毒性相关和氧化应激防御基因的升级.
- 关键调控蛋白质smk和spx的活性增加.
结论:
- 亚抑制性CWA抗生素作为环境线索,重编程细菌调节网络.
- 这些抗生素可以促进从殖民到入侵性疾病表型的过渡.
- 除了抗微生物作用之外,CWA可能无意中增强S. pyogenes的持续性和致病性.
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