重组葡萄球菌抗原-F(r-ScaF),一种新型抗耐甲氧西林金黄色葡萄球菌感染的候选疫苗:效力和疗效研究。

Recombinant Staphylococcal Antigen-F (r-ScaF), a novel vaccine candidate against methicillin resistant Staphylococcus aureus infection: Potency and efficacy studies.

作者信息

Majelan Peyman Avakh, Mahdavi Mehdi, Yazdi Mohammad Hossein, Salimi Elaheh, Pourmand Mohammad Reza

机构信息

Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.

Biotechnology Research Center, Tehran University of Medical Sciences, Tehran, Iran; Recombinant Vaccine Research Center, Tehran University of Medical Sciences, Tehran, Iran.

出版信息

Microb Pathog. 2019 Feb;127:159-165. doi: 10.1016/j.micpath.2018.11.036. Epub 2018 Dec 3.

Abstract

Staphylococcus aureus is a human commensal and pathogen, its clinical importance is exacerbated by the spread of multi-drug resistant strains. The potential future failure of antibiotic therapy necessitates the development of novel control regimes, including new immunotherapeutic approaches. S. aureus has a large repertoire of surface components with potential for immunological targeting. The aim of this study was to evaluate the efficacy of a novel member of staphylococcal conserved antigen family (ScaF) as a factor to elicit cellular and humoral immunity. To determine the ScaF potential as a vaccine candidate, experimental groups of mice were immunized with recombinant Scaf (r-ScaF) formulated in Freund's and alum adjuvants or PBS and subsequently challenged in the sepsis model of S. aureus disease. The vaccine formulations induced robust cellular cytokines responses, including IFN-γ and IL-17, as well as increased production of IgG2a rather than other subclass of IgGs. Active immunization with r-ScaF with adjuvants led to decreased mortality of infected mice and a lower associated bacterial burden in the internal organs in comparison to the control group. Taken together, our Results indicate to the possibility of the r-ScaF protein to be considered as an important component of a multivalent prophylactic vaccine candidate.

摘要

金黄色葡萄球菌是一种人体共生菌和病原体,多重耐药菌株的传播加剧了其临床重要性。抗生素治疗未来可能出现的失效情况使得开发新的控制方案成为必要,包括新的免疫治疗方法。金黄色葡萄球菌有大量具有免疫靶向潜力的表面成分。本研究的目的是评估葡萄球菌保守抗原家族的一个新成员(ScaF)作为引发细胞免疫和体液免疫的因素的功效。为了确定ScaF作为候选疫苗的潜力,将用弗氏佐剂和明矾佐剂或PBS配制的重组ScaF(r-ScaF)免疫小鼠实验组,随后在金黄色葡萄球菌疾病的败血症模型中进行攻毒。疫苗制剂诱导了强大的细胞细胞因子反应,包括IFN-γ和IL-17,以及IgG2a而非其他IgG亚类的产量增加。与对照组相比,用佐剂r-ScaF进行主动免疫导致感染小鼠的死亡率降低,内脏中的相关细菌载量也更低。综上所述,我们的结果表明r-ScaF蛋白有可能被视为多价预防性候选疫苗的重要组成部分。

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