乙化介导的可纳失活:一种新的抗真菌耐药机制
Ludmila Gouveia-Eufrasio1, Gustavo José Cota de Freitas1, Danielle Letícia da Silva1
1Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG 31270-901, Brazil.
概括
像Cryptococcus这样的真菌可以使用酶,一种新的抗真菌耐药机制来禁用可纳. 这一与农业化学品相关的发现提供了潜在的新型抗真菌疗法.
科学领域:
- 菌类学 菌类学是指菌类学.
- 抗微生物耐药性 抗微生物耐药性
- 生物化学 生物化学
背景情况:
- 抗真菌耐药性是一个日益增长的全球健康问题.
- 抗真菌药物的酶性失活是细菌中已知的机制,但在真菌中以前没有描述过.
- 密码球菌种类是密码球菌病的主要原因,密码球菌病是一种严重的真菌感染.
研究的目的:
- 调查真菌,特别是Cryptococcus物种,是否可以通过酶去活化fluconazole.
- 为了确定参与可纳失活的酶和机制.
- 探索这种抗药机制的临床相关性和潜在的治疗策略.
主要方法:
- 研究了由Cryptococcus deuterogattii和Cryptococcus neoformans对可纳的非活性化.
- 分析了基因表达的变化,以应对农业化学物质的暴露.
- 已确定负责可纳乙化的酶 (GCN5,NAT10).
- 评估了O-乙-可纳对14-α-脱甲基酶的结合亲和力的影响.
- 测试了GCN5和NAT10抑制剂在恢复可纳活性方面的疗效.
- 在患者脑脊液样本中检测到O-乙-可纳.
主要成果:
- 菌种类通过酶来使可纳不活化成O-乙-可纳.
- 农业化学品诱导GCN5和NAT10的过度表达,导致可纳的乙化.
- O-乙-可纳不能有效地与14-α-脱甲基酶结合,使可纳变得不活跃.
- GCN5和NAT10的抑制剂恢复了可纳的抗真菌活性.
- 在其他真菌物种中观察到相同的耐药机制.
- 在患有密码球菌脑膜炎的患者的脑脊液中检测到O-乙-可纳.
结论:
- 在真菌中发现了一种通过酶激活可纳来产生抗真菌耐药性的新机制.
- 环境因素,如农业化学品,可以通过保存的酶途径影响临床相关的抗真菌耐药性.
- GCN5和NAT10抑制剂显示出作为辅助剂的承诺,以克服在真菌感染中的弗卢可纳抗性.
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