تولید ایمونوگلوبولینY اختصاصی در زرده تخم مرغ علیه برخی پاتوژن‌های اسهال گوساله

نوع مقاله : مقاله کامل

نویسندگان

گروه علوم دامی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران

چکیده

بیماری اسهال در گوساله‌های شیری یکی از مشکلات عمده در صنعت دامپروری است که اغلب استفاده از آنتی‌بیوتیک‌ها برای درمان آن کارآمد نیستند و نیز ممکن است باعث ایجاد مشکلاتی نظیر مقاومت به آنتی‌بیوتیک شوند، در نتیجه استفاده از جایگزینی طبیعی برای آن‌ها همانند ایمونوگلوبولین (Y (IgY زرده‌ی تخم مرغ ممکن است راه حل مناسبی باشد. هدف از تحقیق حاضر، تولید ایمونوگلوبولین‌های اختصاصی Y علیه پاتوژن‌های مهم اسهال گوساله از قبیل کروناویروس، روتاویروس، اشریشیا کلی و کلستریدیوم پرفرجنس در زرده تخم مرغ بود. این آزمایش بر روی مرغان تخم‌گذار نژاد‌های لاین W36 با دو تیمار (گروه شاهد و گروه واکسینه شده با واکسن سه گانه‌ی کروناویروس، روتاویروس، اشرشیا کلی و همچنین واکسن کلستریدیوم پرفرجنس) و هفت تکرار در هر گروه انجام شد. از SDS-PAGE جهت بررسی کیفی و از روش بردفورد به منظور بررسی کمی ایمونوگلوبولین Y استفاده گردید. نتایج نشان داد، باندهای مربوط به زنجیره‌ی سبک و سنگین IgY در گروه تیمار نسبت به گروه شاهد اختلاف قابل مشاهده‌ای داشت. بررسی با روش بردفورد نشان داد که غلظت IgY ترشح شده در زرده‌ی تخم‌مرغ گروه تیمار mg/mL 4.729 بود. نتایج مربوط به روش‌های پودر کردن نیز نشان داد که خشک نمودن پاششی موجب تخریب ولی خشک نمودن انجمادی باعث حفظ IgY زرده‌ی تخم‌مرغ شد. مطالعات تکمیلی در مورد سنجش فعالیت زیستی IgY اختصاصی تولید شده در این تحقیق ضروری است.

کلیدواژه‌ها


عنوان مقاله [English]

Production of Specific Immunoglobulin Y in Egg Yolk Against Some Calf Diarrhea Pathogens

نویسندگان [English]

  • Z. Mousavi
  • M. Azghandi
  • S. Asadzahe
  • E. Shahriyari
  • V. Kazemi
  • F. Garajian
  • A. Kazemi
  • A. Javadmanesh
Animal Breeding and Genetics, Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
چکیده [English]

Calf diarrhea is a commonly reported disease and a major problem to the livestock industry. Although, antibiotics are used to treat diarrhea in calves, they are not effective against viruses as well as they may cause some other problems such as antibiotic resistance. As a result, natural antibodies such as immunoglobulin Y (IgY) from egg yolk could be a possible replacement for traditional antibiotics with less side effects. The objective of this research was production of specific IgY againt major calf diarrhea pathogens such as coronavirus, rotavirus, E. coli, and Clostridium perfringens in the egg yolk. For this purpose, this experiment was performed with two treatments (control and vaccinated group with the trivalent vaccine of coronavirus, rotavirus, and E. coli as well as Clostridium perfringens vaccine) and seven replicates in each group on W-36 Hy-Line laying hens. SDS-PAGE and Bradford methods were used for quality and quantity evaluations of IgY, respectively. Finally, the effect of freeze-drying and spray drying on IgY degradation was assessed by SDS-PAGE. The results showed that heavy and light chains of IgY were visible in the treatment group. The control group did not show any visible IgY fragments. Furthermore, the quantity of IgY secreted in egg yolk was estimated at 4.729 mg/ml. Finally, the comparison between two drying methods showed that freeze-drying did not damage IgY although spray-drying caused a substantial damage. Furthur experiments are required to validate the biological activity of the specific IgY produced in this study.

کلیدواژه‌ها [English]

  • Diarrhea
  • Calf
  • Antibiotic
  • Egg yolk immunoglobulin
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