香虫 (Candida albicans) 增强铁的吸收,以保持对可纳的耐药性
Rishabh Sharma1, Anubhav Nahar1, Sumant Puri1
1Oral Microbiome Research Laboratory, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA.
Infection and immunity
|February 7, 2025
概括
耐可纳的Candida物种积累更多的铁,增加耐药性. 铁化剂deferasirox (DFX) 与可纳结合有效地杀死耐药菌株,提供了一种新的治疗策略.
科学领域:
- 菌群学和抗菌素耐药性 菌群学和抗菌素耐药性
- 分子生物学和真菌病原发生学
- 药理学和药物发现
背景情况:
- 随着富可纳的广泛使用,产生了耐药的Candida物种,复杂化了临床管理.
- 铁的平衡在真菌中至关重要,影响膜组成和抗真菌药物的敏感性.
- 可纳针对真菌膜中的厄戈斯特,这种途径可能因铁的可用性而受到调节.
研究的目的:
- 为了研究铁在Candida albicans中对可纳耐药性的作用.
- 为了评估铁化剂deferasirox (DFX) 在克服富可纳耐药性的有效性.
- 探索DFX作为独立或组合疗法的潜力,以对抗耐药真菌感染.
主要方法:
- 产生和表征一种抗可纳 (FR) 的Candida albicans菌株.
- 确定可纳和DFX的最小抑制度 (MIC).
- 细胞内铁水平的量化和铁吸收和厄戈斯特醇生物合成途径的基因表达分析.
- 使用小鼠模型进行体内研究,以评估高铁与低铁条件下的治疗疗效.
主要成果:
- 与敏感菌株相比,FR菌株表现出明显更高的细胞内铁积累和高调铁吸收基因.
- FR菌株表现出埃尔戈斯特水平的增加和埃尔戈斯特生物合成基因的增强表达,与可纳耐药性相关.
- 一次致命剂量的DFX与可纳协同作用,以有效地杀死FR菌株,在体外和体外,特别是在高铁环境中.
结论:
- 抗可纳的Candida albicans活跃吸收铁以支持抵抗机制,包括改变的厄戈斯特生物合成.
- 德费拉西洛克斯显示出作为辅助疗法的潜力,通过向铁积累来克服可纳耐药性.
- 结合DFX和可纳的联合治疗提供了一种有前途的策略,用于对抗具有挑战性的耐药性真菌感染.
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