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胆固醇通过与宿主防御系统的协同相互作用,对mcr+ Enterobacteriaceae产生强大的活性

Monika Kumaraswamy¹, Angelica Riestra², Anabel Flores³

¹Division of Infectious Diseases, UT Tyler, Tyler, United States of America.

The Journal of clinical investigation

|April 22, 2025

概括

胆固醇在生理条件下保留了对抗胆固醇耐药格拉姆阴性细菌的活性,这挑战了标准测试. 这表明素可能有利于患有mcr+感染的患者.

科学领域:

微生物学微生物学
传染性疾病传染性疾病
药理学药理学是指药理学的学科.

背景情况:

胆固醇 (COL) 是针对多药耐药性格拉姆阴性细菌感染的最后手段抗生素.
塑体传播的胆固醇抗性 (mcr) 基因的传播威胁到COL的有效性.
标准抗微生物敏感性测试 (AST) 介质不反映体内条件.

研究的目的:

在生理学上相关的背景下评估对mcr+ 阴性细菌的COL活性.
为了研究COL与宿主免疫因子 (如血清补充) 的相互作用.
在感染的临床前模型中评估COL的治疗潜力.

主要方法:

使用碳酸盐在组织培养基中对mcr+ Escherichia coli,Klebsiella pneumoniae和Salmonella enterica进行COL测试.
评估COL对血清补充体沉积的影响以及与人体血清的协同作用.
在大肠杆菌病的小鼠模型和人类血液中评估COL疗效.

主要成果:

在含二碳酸盐的介质中,COL对mcr+菌株表现出杀菌活性.
COL促进了补充沉积,并与人体血清协同,以增强细菌杀死.
在可达到的度下,COL在人类血液和小鼠细菌病模型中有效.

结论:

标准AST可能低估了对mcr+菌株的COL活性.
当在生理学上评估时,COL可能是mcr + 格兰阴性感染的可行的治疗选择.
对于具有有限治疗选择的高风险患者,需要进行进一步的临床研究.

关键词:

细菌感染细菌感染药物治疗是药物治疗.传染性疾病传染性疾病.微生物学微生物学

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