بررسی غلظت هورمون‌های تیروئیدی و کورتیزول در گاوهای هلشتاین قبل و بعد از زایمان

نوع مقاله : مقاله پژوهشی

نویسندگان
مصطفی رجایی‌نیا 1
سیده ام‌البنین قاسمیان 2
1 گروه دامپزشکی، واحد شوشتر، دانشگاه آزاد اسلامی، شوشتر- ایران
2 گروه دامپزشکی، واحد بهبهان، دانشگاه آزاد اسلامی، بهبهان- ایران
10.22034/IJVCS.2024.14899.1104
چکیده
مطالعه تغییرات غلظت هورمون‌های کورتیزول و تیروئید سرم خون به‌عنوان گامی مؤثر در پایش سلامت دام‌ها به شمار می‌رود. مطالعه حاضر باهدف بررسی غلظت هورمون‌های تیروئیدی و کورتیزول در گاوهای هلشتاین دو هفته قبل و دو هفته بعد از زایمان صورت گرفت.  پژوهش حاضر یک مطالعه شبه‌آزمایشی بود که روی  60 رأس گاو ماده سه‌ساله با نژاد هلشتاین انجام شد. نمونه‌‌های خون 14 روز پیش از زایش و 14 روز بعد از زایش از ورید دمی گرفته شدند. غلظت هورمون‌های تیروئید و کورتیزول با استفاده از کیت الایزا مورد بررسی قرار گرفتند. سطح هورمون تحریک‌کننده تیروئید (TSH)، تیروکسین (T4 و T3) و کورتیزول در سه گروه تلیسه‌ها، یک شکم زایش‌‌ها‌‌ و دو شکم زایش‌ها مورد مقایسه قرار گرفت. سطح هورمون T4 پس از زایمان حیوانات (26/3 ± 07/7 نانوگرم بر دسی‌لیتر) به طور معنی‌داری بالاتر از سطح آن پیش از زایمان (83/1 ± 98/4 نانوگرم بر دسی‌لیتر) بود (05/0>P). بااین‌حال، سطح T3 و TSH پیش و پس از زایمان تفاوت معنی‌داری نداشتند. به نظر می‌‌رسد که غلظت T4 پیش از زایش پایین‌تر از غلظت این هورمون پس از زایش است. نتایج به‌دست‌آمده در این پژوهش بیانگر آن است که هورمون‌های کورتیزول، T3 و TSH پیش و پس از زایمان به لحاظ آماری یکسان است. بااین‌حال، غلظت هورمون تیروکسین دو هفته پس از زایش بالاتر از دو هفته قبل از زایش بود. 
کلیدواژه‌ها
دوره انتقال
تیروئید
کورتیزول
گاو شیری

عنوان مقاله English

Investigating the Concentrations of Thyroid Hormones and Cortisol in Holstein Cows Before and After Parturition

نویسندگان English

Mostafa Rajaeinia 1
Seyedeh Ommolbanin Ghasemian 2
1 Department of Veterinary Medicine, Shoushtar Branch, Islamic Azad University, Shoushtar- Iran.
2 Department of Veterinary Medicine, Behbahan Branch, Islamic Azad University, Behbahan- Iran
چکیده English

Studying the changes in the concentration of cortisol and thyroid hormones in blood serum is considered an effective step in monitoring the health of animals. The purpose of this study was to investigate the concentration of thyroid hormones and cortisol in Holstein cows two weeks before and two weeks after calving. This research was a quasi-experimental study conducted on 60 three-year-old Holstein cows. Blood samples were taken from tail vein 14 days before birth and 14 days after birth. The concentration of thyroid hormones and cortisol were investigated using an ELISA kit. The levels of thyroid-stimulating hormone (TSH), thyroxine (T4 and T3), and cortisol were compared in three groups of heifers: one pregnant and two pregnant heifers. The level of T4 hormone after the birth of animals (7.07±3.26 ng/dL) was significantly higher than its level before this event (4.98±1.83 ng/dL) (P<0.05). However, T3 and TSH levels were not significantly different before and after parturition. It seems that the concentration of T4 before parturition is lower than the concentration of this hormone after parturition. The results of this research indicate that cortisol, T3, and TSH hormone levels before and after parturition are statistically the same. However, the concentration of thyroxine hormone two weeks after parturition was higher than it was two weeks before parturition

کلیدواژه‌ها English

Transition Period
Thyroid
Cortisol
Dairy Cow
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علوم درمانگاهی دامپزشکی ایران
دوره 18، شماره 2 - شماره پیاپی 31
پاییز و زمستان 1403
دی 1403
صفحه 59-65