环盐作为一种抗真菌剂:干扰氏菌种. 和 Cryptococcus neoformans 有毒性的机制
Fátima Cerqueira1,2,3, Rui Medeiros1,2,3, Inês Lopes3,4
1FP-I3ID, FP-BHS, GIT-LoSa, University Fernando Pessoa, Praça 9 de Abril, 349, 4249-004 Porto, Portugal.
Antibiotics (Basel, Switzerland)
|March 27, 2024
概括
一种新型的环盐通过抑制关键毒性因子,有效地对抗像Candida albicans和Cryptococcus neoformans这样的高优先级酵母菌. 这种化合物向生物膜形成和特定的真菌机制,而不会在抑制度下引起抗氧化作用.
科学领域:
- 医学真菌学 医学真菌学
- 抗微生物化学 抗微生物化学
背景情况:
- 酵母菌引起的真菌感染,如 *Candida albicans*, *Cryptococcus neoformans* 和 *Candida krusei* 构成越来越大的威胁,有几种物种被世界卫生组织 (WHO) 列为高优先级.
- 开发针对毒性机制的新抗真菌剂对于对抗耐药性真菌病原体至关重要.
研究的目的:
- 调查环盐H4[H2(4-CF3PhCH2) 2Cyclam]Cl4对世卫组织优先酵母的疗效.
- 确定该化合物对真菌毒性因子的干扰,包括生物膜生成,二形转变,黑色素合成和酶活性.
主要方法:
- 最低抑制度 (MIC) 的确定.
- 评估生物膜的产生,酶活性,二态过渡 (*C. albicans*) 和黑色素的产生 (*C. neoformans*).
- 对抗氧化活性的DPPH测定和在RAW264.7巨中检测氧化 (NO) 的格里斯反应.
主要成果:
- 环盐H4[H2(4-CF3PhCH2) 2Cyclam]Cl4在测试的酵母中显著抑制了生物膜的产生和催化酶活性.
- 该化合物干扰了*C. albicans*的二态转变和*C. neoformans*的黑色素产生.
- 在MIC值时没有观察到抗氧化作用. 虽然减少了巨细胞中NO的产生,但该化合物表现出显著的细胞毒性.
结论:
- 环盐H4[H2(4-CF3PhCH2) 2Cyclam]Cl4通过准高优先级酵母的关键毒性机制,表现出有希望的抗真菌活性.
- 需要进一步的研究来探索其治疗潜力,考虑到巨细胞模型中观察到的细胞毒性.
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