在临床Pseudomonas aeruginosa分离物中mexB,mexY和oprD表达的变化
Yoshimi Matsumoto1, Seiji Yamasaki1,2,3, Kouhei Hayama1
1SANKEN (The Institute of Scientific and Industrial Research), Osaka University.
概括
排泄抑制剂与诸如西普罗素或阿兹特雷诺南之类的抗生素相结合,在治疗多药耐药性Pseudomonas aeruginosa (MDRP) 感染方面表现有前途. 这种方法针对mexY和oprD等关键基因,增强药物易感性.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- Pseudomonas aeruginosa 是一个重要的机会性病原体.
- 在P. aeruginosa中,多药耐药性 (MDRP) 构成了重大的临床挑战.
- 排泄和毛细菌通道是抗生素耐药性的关键机制.
研究的目的:
- 为了研究排泄基因 (mexB, mexY) 和基因 (oprD) 在MDRP中的作用.
- 评估排泄抑制剂 (Phe-Arg-β-naphthylamide) 在恢复抗生素敏感性的有效性.
- 为了确定金属β-乳糖酶 (MBL) 和AAC(6') -Iae在MDRP菌株中的流行率.
主要方法:
- 在MDRP,药物敏感和单抗生素耐药菌株中对基因表达的比较分析.
- 实时定量逆转录聚合酶链反应 (RT-qPCR) 用于基因表达分析.
- 在排泄抑制剂治疗之前和之后确定抗生素敏感性.
主要成果:
- 排泄抑制剂治疗使MDRP对西普罗夫洛克萨 (71%),阿兹特雷诺纳姆 (73%) 和伊米佩内姆 (29%) 重新敏感.
- 在69%和62%的MDRP菌株中,MBL和AAC(6') -Iae的流行率分别为69%和62%.
- 在MDRP中观察到,mexY表达升高 (76%的菌株) 和 oprD表达降低 (69%的菌株).
结论:
- 在MDRP中,mexY的过度表达和oprD的不足表达显著.
- 与排泄抑制剂和抗生素 (如西普罗夫洛克萨或阿兹特雷诺南) 的联合治疗可能是治疗MDRP感染的可行策略.
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