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首页> 外文期刊>Infection and immunity >Preferential induction of septic arthritis and mortality by superantigen-producing staphylococci.
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Preferential induction of septic arthritis and mortality by superantigen-producing staphylococci.

机译:产生超抗原的葡萄球菌对败血性关节炎的优先诱导和死亡率。

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Staphylococcal enterotoxins A through D (SEA through SED) and toxic shock syndrome toxin-1 display superantigen properties, i.e., they stimulate a great fraction of T cells expressing certain T-cell receptor V beta sequences. Using a newly established rat model of septic Staphylococcus aureus arthritis, we have recently shown that an S. aureus strain producing SEA showed marked arthritogenic properties. In the present study we decided to employ another five S. aureus strains, each one producing a distinct exotoxin. Almost all rats injected with superantigen-producing strains developed arthritis. In contrast, only 20% of rats injected with an S. aureus strain lacking superantigen production displayed mild and transient arthritis. Mortality was preferentially induced among the rats inoculated with the S. aureus strains producing SEB and SED. This study emphasizes that superantigen production is an important virulence factor in the development of septic S. aureus arthritis. Differences concerning mortality between staphylococcal strains producing different exotoxins may be dependent on the degree of activation of the immune system.
机译:金黄色葡萄球菌肠毒素A到D(SEA到SED)和中毒性休克综合症毒素1显示出超抗原特性,即它们刺激表达某些T细胞受体Vβ序列的大部分T细胞。使用新建立的败血性金黄色葡萄球菌关节炎大鼠模型,我们最近显示,产生SEA的金黄色葡萄球菌菌株显示出明显的致关节炎特性。在本研究中,我们决定采用另外五种金黄色葡萄球菌菌株,每一种都产生不同的外毒素。几乎所有注射产生超抗原的菌株的大鼠都患有关节炎。相比之下,仅20%注射缺乏超抗原产生的金黄色葡萄球菌菌株的大鼠显示出轻度和短暂性关节炎。在接种产生SEB和SED的金黄色葡萄球菌菌株的大鼠中优先诱导死亡率。这项研究强调,超抗原的产生是化脓性金黄色葡萄球菌关节炎发展的重要毒力因子。产生不同外毒素的葡萄球菌菌株之间关于死亡率的差异可能取决于免疫系统的激活程度。

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