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副溶血性弧菌神奈川现象相关溶血素的简化纯化及生物物理化学特性

Simplified purification and biophysicochemical characteristics of Kanagawa phenomenon-associated hemolysin of Vibrio parahaemolyticus.

作者信息

Miyamoto Y, Obara Y, Nikkawa T, Yamai S, Kato T, Yamada Y, Ohashi M

出版信息

Infect Immun. 1980 May;28(2):567-76. doi: 10.1128/iai.28.2.567-576.1980.

DOI:10.1128/iai.28.2.567-576.1980
PMID:7399675
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC550972/
Abstract

Kanagawa phenomenon-associated hemolysin (K-hemolysin) was purified by Sephadex gel and ion-exchange column chromatography, after the culture supernatant had been adsorbed on and eluted from diethylaminoethyl-Sepharose CL-6B, and acid precipitated. K-hemolysin was a heat-stable and trypsin-susceptible protein with an apparent molecular weight of 44,000, the subunit of which was 22,000. The isoelectric point was 4.9. The minimum hemolytic dose was 0.1 mug/ml. The fifty percent lethal dose by intravenous injection was 1.4 mug. Electron microscopy of the small intestine of suckling mice orally challenged with the highest dose (50 mug) not only showed disappearance of epithelial cell microvilli, but also structural disturbances of the endoplasmic reticulum and mitochondrial swelling. One blueing dose representing permeability factor activity was 0.3 mug, and positive reaction in the rabbit ileal loop appeared at above 125 mug. Besides these data in experimental models, we discovered the appearance of an antibody in patients which neutralizes K-hemolysin during the course of the disease. This finding reinforces our view that K-hemolysin plays a most significant role in the pathogenesis of this enteric human disease.

摘要

将培养上清液吸附于二乙氨基乙基 - 琼脂糖CL - 6B并洗脱,然后进行酸沉淀后,通过葡聚糖凝胶和离子交换柱色谱法纯化神奈川现象相关溶血素(K - 溶血素)。K - 溶血素是一种热稳定且对胰蛋白酶敏感的蛋白质,表观分子量为44,000,其亚基为22,000。等电点为4.9。最小溶血剂量为0.1微克/毫升。静脉注射的半数致死剂量为1.4微克。用最高剂量(50微克)经口攻击的乳鼠小肠的电子显微镜检查不仅显示上皮细胞微绒毛消失,还显示内质网结构紊乱和线粒体肿胀。代表通透因子活性的一个致蓝剂量为0.3微克,在兔回肠袢中,125微克以上出现阳性反应。除了这些实验模型中的数据外,我们还发现患者在疾病过程中出现了中和K - 溶血素的抗体。这一发现强化了我们的观点,即K - 溶血素在这种人类肠道疾病的发病机制中起最重要作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d85/550972/a5832ddac38b/iai00173-0272-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d85/550972/706f49aa69dc/iai00173-0269-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d85/550972/09fd150979ac/iai00173-0269-b.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d85/550972/49b16a691f82/iai00173-0269-c.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d85/550972/d7e2a454fd4c/iai00173-0271-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d85/550972/a5832ddac38b/iai00173-0272-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d85/550972/706f49aa69dc/iai00173-0269-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d85/550972/09fd150979ac/iai00173-0269-b.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d85/550972/49b16a691f82/iai00173-0269-c.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d85/550972/d7e2a454fd4c/iai00173-0271-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d85/550972/a5832ddac38b/iai00173-0272-a.jpg

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