The effect of clostridium difficile Toxins Aand B on ligated rabbit IIeal loop and cultured cell link BK
محل انتشار: مجله دانشگاه علوم پزشکی کرمان، دوره: 6، شماره: 2
سال انتشار: 1378
نوع سند: مقاله ژورنالی
زبان: فارسی
مشاهده: 63
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شناسه ملی سند علمی:
JR_JKMU-6-2_004
تاریخ نمایه سازی: 19 اسفند 1402
چکیده مقاله:
clostridium difficile has been recognized as the major cause of pseudomembranous colitis.this bacterium produces two toxins(an enterotoxin -cytotoxin and a potent cytotoxin called toxin A and toxin B erespectively).these toxins have implicated in pathogenesis of the disease.however,histopathological effects of their molecular mass less than ۱۰۰KDa have been essayed.in the persent study,we examined the dose repsonse and time course of these toxins in ligated rebbit ileal loop and cell culture link BK (boving kidney).the ۱-۱۰ mg/ml toxin A, with molecullar weight of ۲۵ KDa,in ligated rabbit ileal loop(۶ rabbits with maximum of ۱۵ loopes in each animals) showed a series of histopathological changes leading to inflammation,fluid or bloody fluid accumulation,mucous and villi disraotion in lammina properia.different concentration of toxin B(MW=۶۰ KDa) had no effect on fluid accumulation in striped rabbit ileal loop but caused driness and necrosis intensively.cultured cells exposed to ۱mg/ml toxin B showed a series of cytopathologic changes leading to cell retraction and rounding accompanied by the marginalization of the cell membrane.Enhancement of toxin concentration caused increament of cytopathic effects.
کلیدواژه ها:
clostridium difficile ، pseudomembranouse coltitis ، Toxin Aand B ، rabbit ligated ileal loop ، cell culture
نویسندگان
R.A Ataei
Instructor
GH Behzadian nejhad
Associate professor