Mac Protein is not an Essential Virulence Factor for the Virulent Reference Strain Streptococcus suis P1/7

Mac Protein is not an Essential Virulence Factor for the Virulent Reference Strain Streptococcus suis P1/7
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Mac 蛋白不是毒力参考菌株猪链球菌 P1/7 的必需毒力因子

DOI:
10.1007/s00284-016-1160-3
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发表时间:
2016
影响因子:
2.6
通讯作者:
Chengping Lu
Chengping Lu
中科院分区:
生物学4区
文献类型:
--
作者:
Genhui Xiao;Zongfu Wu;Shouming Zhang;Huanyu Tang;Fengqiu Wang;Chengping Lu

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猪链球菌是猪的主要致病菌,也是人类重要的人兽共患病病原。色葡萄含有Mac-1结构域的suis蛋白(命名为Mac)是一种保护性抗原,专门切割猪IgM,并在存在高滴度的特异性猪抗-S的情况下有助于补体逃避。suis IgM,但其在S.在无特异性IgM的自然健康宿主中,尚未研究过猪的毒力。本研究通过在S.猪血清2型强毒参考株P1/7。mac的缺失没有显着影响小鼠巨噬细胞RAW 264.7内的吞噬作用或细胞内存活,或RAW 264.7和小鼠中性粒细胞的氧化爆发诱导。此外,在猪、小鼠和斑马鱼感染模型中,突变株与野生型菌株一样毒力强。我们的数据表明Mac对S不是必需的。P1/7株对自然健康宿主的毒力无特异性IgM,Mac的免疫原性与其毒力无关。
Streptococcus suis is a major pathogen of pigs and also an important zoonotic agent for humans. A S. suis protein containing Mac-1 domain (designated Mac) is a protective antigen, exclusively cleaves porcine IgM, and contributes to complement evasion with the presence of high titers of specific porcine anti-S. suis IgM, but its role in S. suis virulence has not been investigated in natural healthy host without specific IgM. In this study, a mac deletion mutant was constructed by homologous recombination in S. suis serotype 2 virulent reference strain P1/7. Deletion of mac did not significantly influence phagocytosis or intracellular survival within murine macrophages RAW264.7, or the oxidative-burst induction of RAW264.7 and murine neutrophils. Furthermore, the mutant is as virulent as the wild-type strain in pig, mouse, and zebrafish infection models. Our data suggest that Mac is not essential for S. suis virulence in strain P1/7 in natural healthy host without specific IgM, and the immunogenicity of Mac does not appear to correlate with its significance for virulence.
Mac 蛋白不是毒力参考菌株猪链球菌 P1/7 的必需毒力因子
DOI: 10.1007/s00284-016-1160-3
发表时间: 2016
影响因子: 2.6
作者:
Genhui Xiao;Zongfu Wu;Shouming Zhang;Huanyu Tang;Fengqiu Wang;Chengping Lu
通讯作者: Chengping Lu
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发表时间: 2013
期刊: PloS one
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影响因子: 2.2
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发表时间: 2009-12-15
影响因子: 1.8
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