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温和噬菌体在A组链球菌产生致热外毒素中的作用

THE ROLE OF TEMPERATE BACTERIOPHAGE IN THE PRODUCTION OF ERYTHROGENIC TOXIN BY GROUP A STREPTOCOCCI.

作者信息

ZABRISKIE J B

出版信息

J Exp Med. 1964 May 1;119(5):761-80. doi: 10.1084/jem.119.5.761.

Abstract

Non-lysogenic, non-toxinogenic Group A streptococci when infected by temperate bacteriophages isolated from known scarlatinal toxin-producing strains acquire the capacity to form erythrogenic toxin. This toxin causes a characteristic erythematous reaction in the skin of rabbits and is readily neutralizable by standard scarlatinal antitoxins. The production of toxin appears to be related to the synthesis of mature phage particles since ultraviolet enhancement of phage production results in a concomitant increase in toxin titer. In contrast, there is no increase in the production of another extracellular product, deoxyribonuclease, by these lysogenized streptococci. Furthermore, cellular disruption studies indicate that the toxin probably does not exist in a preformed state within the cell. Double diffusion reactions in agar indicate that a newly formed protein appears in the lysogenic culture filtrate and is absent in the non-lysogenic filtrates.

摘要

当从已知能产生猩红热毒素的菌株中分离出的温和噬菌体感染非溶原性、不产生毒素的A组链球菌时,这些链球菌就获得了形成红斑毒素的能力。这种毒素会在兔皮肤上引起典型的红斑反应,并且很容易被标准的猩红热抗毒素中和。毒素的产生似乎与成熟噬菌体颗粒的合成有关,因为噬菌体产量的紫外线增强会导致毒素效价随之增加。相比之下,这些溶原化的链球菌产生的另一种细胞外产物——脱氧核糖核酸酶的产量并没有增加。此外,细胞破碎研究表明,毒素可能并非以预先形成的状态存在于细胞内。琼脂中的双向扩散反应表明,溶原性培养滤液中出现了一种新形成的蛋白质,而非溶原性滤液中则没有这种蛋白质。

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