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通过变异分析优化细菌EntV的抗真菌特性

Shantanu Guha¹, Shane A Cristy¹, Giuseppe Buda De Cesare¹

¹Department of Microbiology and Molecular Genetics, The University of Texas Health Science Center at Houston, Houston, Texas, USA.

|April 8, 2024

概括

研究人员通过修改来自Enterococcus faecalis的天然来开发新的抗真菌. 这些增强型对Candida albicans表现出强烈的活性,并在动物模型中有效,为抗药性真菌感染提供了新的希望.

科学领域:

微生物学与传染病的研究
类治疗药物类治疗药物
抗微生物耐药性抗微生物耐药性

背景情况:

由于抗真菌耐药性日益增加,真菌感染,特别是由Candida物种引起的真菌感染,是全球日益严重的健康问题.
现有的抗真菌药物越来越无效,需要开发新的治疗药物.
自然存在的抗微生物 (AMP) 是新的抗真菌药物发现的有希望的来源.

研究的目的:

为了识别之前描述的抗真菌 (EntV) 中的关键残留物,对其对Candida albicans的活性至关重要.
通过合成分子演化 (SME) 来产生和选具有增强抗真菌功能的新变体.
在临床前模型中评估最有前途的候选者的稳定性和体内疗效.

主要方法:

使用氨酸扫描突变发生法来确定抗真菌活性关键氨基酸残留物.
合成分子进化 (SME) 用于创建一个合理设计的变体库.
用生物膜和Caenorhabditis elegans感染试验选了类变体,然后进行化学修改 (D-氨基酸替代,碳化合物堆) 以提高稳定性.
有前途的候选人被测试在小鼠模型的口腔喉和全身疹.

主要成果:

在EntV的10氨基酸α螺旋域内识别关键残留物.
与母相比,发现了五种具有显著增强抗真菌活性的"功能获取"变体.
在小鼠模型中,最强大的改性在预防真菌感染方面已证明有效.
化学修改,包括D-氨基酸替代和碳化合物拼接,提高了的稳定性.

结论:

合成分子进化是一种有效的策略,用于增强自然存在的的抗真菌活性.
开发的变体对Candida表现出强烈的活性,并作为新型抗真菌疗法具有前景.
这些发现有助于制定新的策略,以打击耐药真菌感染日益增长的威胁.

关键词:

这是一种Candida Candida.这是Cryptococcus.抗真菌疗法是一种抗真菌疗法.抗微生物类的抗微生物.

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