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SP-CHAP是一种内素,具有针对生物膜肺炎球菌和鼻殖民的增强活性

Adit B Alreja¹, Amanda E Appel², Jinyi C Zhu³

¹Institute for Bioscience and Biotechnology Research, University of Maryland, Rockville, Maryland, USA.

|March 12, 2024

概括

一种新兴的酶SP-CHAP显示出强大的抗菌活性,可以对抗Streptococcus pneumoniae (Spn),为抗生素提供一个有希望的替代品. 这种内素有效地对抗包括生物膜在内的SPN感染,并减少小鼠模型中的殖民.

科学领域:

微生物学微生物学
生物化学生物化学
药物发现药物发现药物发现

背景情况:

* *肺炎菌 (Spn) 引起侵入性感染,抗生素耐药性增加需要新的治疗方法.
* 细菌衍生的内素正在作为抗菌替代品进行探索.
* 固氨酸,氨酸依赖的氨基化酶/化酶 (CHAP) 域在内素中很常见,但在肺炎球菌内素中以前没有报道过.

研究的目的:

* 为了描述SP-CHAP,第一个具有CHAP催化域的肺炎球菌内溶素.
* 评估SP-CHAP对*Spn*的抗菌活性,对生物膜的有效性,以及在小鼠殖民模式中的性能.
* 评估SP-CHAP作为对*Spn*感染的潜在治疗选择.

主要方法:

* 克隆,生产和净化SP-CHAP内溶素.
* 生物化学表征和抗微生物测定对 *Spn* 血清和共生生物的测定.
*评估SP-CHAP对*Spn*生物膜的有效性 *in vitro*和小鼠鼻殖民模式.

主要成果:

*SP-CHAP证明了对所有测试的*Spn*血清病毒的抗菌活性,超过了CPL-1的疗效.
*SP-CHAP在低度 (1.56μg/mL) 时有效地消除了*Spn*生物膜.
* *体内*研究表明,SP-CHAP在小鼠模型中显著减少了 *Spn* 殖民,表现优于 Cpl-1.

结论:

*SP-CHAP是一种强大的肺炎球菌内溶酶,具有新的CHAP催化域.
*SP-CHAP对包括生物膜在内的*Spn*表现出广泛的活性,并显示出*in vivo*的治疗潜力.
*SP-CHAP代表了一种有前途的抗生素替代品,用于对抗 *Streptococcus pneumoniae* 感染.

关键词:

在CHAP域名中,您可以使用CHAP域名.抗生素耐药性抗生素耐药性细菌菌体是一种菌体.这种内分泌物是endolysin.这是肺炎球菌.

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