Production of Shiga toxin and other cytotoxins by serogroups of Shigella.

Production of Shiga toxin and other cytotoxins by serogroups of Shigella.
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志贺氏菌血清群产生志贺毒素和其他细胞毒素。

DOI:
10.1093/infdis/154.6.996
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发表时间:
1986
期刊:
The Journal of infectious diseases
影响因子:
--
通讯作者:
Pickering,LK
Pickering,LK
中科院分区:
--
文献类型:
--
作者:
Bartlett3rd,AV;Prado,D;Cleary,TG;Pickering,LK

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我们用[~ 3 H]胸腺嘧啶标记的HeLa细胞定量法测定了119株志贺氏菌的细胞毒活性。检测了13株志贺菌、18株沙门氏菌、18株耐药菌株。志贺菌2型和3型;宋内志贺菌、福氏志贺菌和鲍氏志贺菌88株。S. dysenteriae 1表现出高水平的细胞毒性(几何平均值,105.04CD50/mg蛋白质;范围,103.95-106.10)。非1型菌株的细胞毒活性。志贺氏菌群的平均菌数为S的1/1,000。大肠杆菌1株(范围,101.09- 103.11CD 50/mg蛋白)。用纯化的滋贺毒素的兔抗血清中和细胞毒性,结果表明,在所有的S.大肠杆菌1,99.5%的细胞毒活性归因于滋贺毒素。与此相反,88个其他志贺氏菌株仅产生不可中和的细胞毒活性。18株非1 S型菌株中有6株。88株志贺菌中12株同时产生滋贺毒素和非中和毒素。
We measured the cytotoxic activity of 119 strains ofShigellaby using a quantitative [3H]thymidine-labeled HeLa cell assay. We assayed 13 strains ofShigella dysenteriae1; 18 strains ofS. dysenteriaetypes 2 and 3; and 88 strains ofShigella sonnei,Shigella flexneri, andShigella boydii. Strains ofS. dysenteriae1 demonstrated high levels of cytotoxicity (geometric mean, 105.04CD50/mg of protein; range, 103.95–106.10). Cytotoxic activities of the non-type 1 strains ofS. dysenteriaeand of the otherShigellaserogroups were ∼1/1,000 that of theS. dysenteriae1 strains (range, 101.09–103.11CD50/mg of protein). Neutralization of cytotoxicity by using rabbit antiserum to purified Shiga toxin revealed that in all strains ofS. dysenteriae1, ⩾99.5% of cytotoxic activity was attributable to Shiga toxin. In contrast, 88 of the otherShigellastrains produced only nonneutralizable cytotoxic activity. Six of 18 strains of non-type 1S. dysenteriaeand 12 of 88 strains from otherShigellaserogroups produced both Shiga toxin and nonneutralizable toxin.
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