نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد انگلشناسی و قارچشناسی، دانشکدة پزشکی، دانشگاه علوم پزشکی ایران، تهران، ایران

2 استاد انگل‌شناسی، دانشکدة علوم پزشکی، دانشگاه تربیت مدرس، تهران، ایران

3 استاد بیوشیمی، دانشکدة پزشکی، دانشگاه علوم پزشکی ایران، تهران، ایران

4 انشجوی دکتری انگل شناسی،دانشکدةپزشکی،دانشگاه علوم پزشکی ایران ، تهران ، ایران

5 دانشگاه علوم پزشکی سبزوار دانشکده پزشکی گروه ایمنی میکروبیولوژی و انگل شناسی

6 استادیار ایمونولوژی، مرکز بهداشت ارومیه، معاونت بهداشت، دانشگاه علوم پزشکی ارومیه، ارومیه، آذربایجان غربی، ایران

7 گروه انگل شناسی و قارچ شناسی دانشکده پزشکی دانشگاه علوم پزشکی ایران تهران ایران

چکیده

مقدمه: توکسوپلاسما گوندی یک انگل داخل سلولی اجباری و عامل عفونت توکسوپلاسموزیس و دارای دو فرم غیر مهاجم برادی زوئیت و مهاجم تاکی زوئیت می باشد . هدف این تحقیق برای اولین باربررسی تاثیر ویتامینهای Cو Eدربالا بردن سطح سرمی نیتریک اکساید و نقش فزاینده آن درکشتن تاکی زوئیتهای مهاجم انگل درموشهای حساسBALB/c می باشد.
روش کار: چهارده 14 گروه 5 تایی (70سر) موش BALB/cبطور تصادفی به دو گروه کنترل ومورد تقسیم شدند. هشت گروه کنترل عبات بودند از: یک گروه کنترل منفی که هیچ ویتامین ویا انگلی دریافت نکردند. سه گروه شامل دریافت فقط ویتامین C ، یا ویتامین E و یاهر دو ویتامین بودند. دوگروه کنترل مثبت که با دودوز مختلف 5×104 یا104 انگل آلوده شدندو دوگروه دیگر یکی سالین ودیگری متانول دریافت کردند. شش گروه مورد شامل : سه گروه دریافت کننده 5×104 انگل و سه گروه دریافت کننده 104انگل بودند. به هرکدام از موشها یکی ازویتامینها به تنهایی ویا همراه باهم تجویز شد. میزان ویتامین Eبه مقدار 100 میکرو لیتریک روز درمیان یا ویتامین C به مقدار 200 میکرو لیتر روزانه بصورت داخل صفاقی به مدت 5 روز تجویزشد. همین رژیم برای موشهائی که هردوویتامین را دریافت کردند اجرا شد. درروز ششم موشها با تاکی زوئیتهای انگل بصورت داخل صفاقی عفونی شدند. سه روز بعد ازتلقیح عفونت ، نمونه گیری انجام شد. سرمها درºC 20 – تا زمان انجام تستها ذخیره شدند. پس از جداسازی ماکروفاژهای صفاقی موشها ، تاکی زوئیتها شمارش شدند وسنجش نیتریک اکسایدنیزصورت گرفت .

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The Effect of Vitamins C and E on Nitric Oxide Elevation to enhance killing of phagocytised Tachizoites of Toxoplasma gondii in BALB/c mice

نویسندگان [English]

  • Behnaz Jalalizadegan 1
  • Fatemeh Ghaffarifar 2
  • Soudabeh Fallah 3
  • Taher Elmi 4
  • Mohammad Javad Namazi 5
  • Fatemeh Vafa Shoar 6
  • Fatemeh Tabatabaee 7

1 Department of Parasitology and Mycology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.

2 Department of Parasitology, Faculty of Medical Sciences, Tarbiat Modares University

3 Department of Biochemistry, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.

4 Department of Parasitology and Mycology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.

5 Department of Microbiology, Immunology and Parasitolgy, Faculty of Medicine, Sabzevar university of medical sciences, Sabzevar, Iran

6 Urmia city health center,Health deputy of west Azerbaijan, Urmia University of |Medical Sciences, Urmia ,Iran

7 Department of Parasitology and Mycology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.

چکیده [English]

Background: Toxoplasma gondii is an obligatory intracellular parasite causes toxoplasmosis. The parasite has two forms, noninvasive bradizoites and invasive tachizoites. The present study, for the first time, aimed to evaluate the effect of vitamins C and E on nitric oxide (NO) elevation to promote killing invasive tachizoites by macrophages in susceptible BALB/c mice.
Materials and Methods: Seventy BALB/c mice were recruited and randomly divided into fourteen groups of five (n=5). Control groups: one group left intact. Two groups were given saline or methanol. Two groups were infected with 104 or 5×104 parasites. The other groups were administrated only vitamin C, E, or both. The rest of sample and control groups were infected with either 104 or 5×104 tachizoites and supplemented with 100 µl vitamin E every other day, or 200 µl of vitamin C daily. Vitamins were intraperitoneally administered up to five days. On sixth day mice were intraperitoneally infected with tachyzoites. The blood samples were taken three days post infection, serum collected and stored at - 20 Cº until examinations. The peritoneal macrophages were isolated for counting phagocytised tachyzoites and nitric oxide assays.
Results: Tachyzoites were significantly decreased after vitamin C & E administration in the infected mice compared to the controls. In mice supplemented vitamins NO levels were significantly higher compared to controls.
Conclusion: Our findings showed that administration of vitamin C, E or both significantly enhanced killing invasive parasites through NO elevation produced by activated macrophages and may have therefore, complementary therapeutic effects.

کلیدواژه‌ها [English]

  • Toxoplasma gondii
  • Vitamin E
  • Vitamin C
  • Nitric Oxide
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