ارتباط بین پروتئین‌‌های شوک حرارتی و از دست رفتن آبستنی در گاوهای شیری هلشتاین

نوع مقاله : مقاله کامل

نویسندگان

گروه علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، مازندران، ایران

چکیده

هدف از پژوهش حاضر بررسی ارتباط بین بیان نسبی ژن‌‌های پروتئین‌‌های شوک حرارتی(HSPs) و مرگ ومیر رویانی و از دست رفتن آبستنی در گاوهای شیری هلشتاین طی فصل تابستان بود. برای انجام این پژوهش 32 رأس گاو هلشتاین(با تولید بیشتر از 30 کیلوگرم در روز و نوبت زایش 7/1±3/3) انتخاب شدند. تمام گاوها با استفاده از پروتکل همزمانی فحلی G7G تلقیح شدند. در روز 16 پس از تلقیح از تمام گاوها خونگیری و بیان ژن ISG15 اندازه‌‌گیری شد. بر مبنای نتایج ISG15 گاوهایی که مرگ و میر رویانی در آن‌‌ها اتفاق افتاده شناسایی شدند(14 راس). سپس با استفاده از دستگاه Real-Time PCR بیان نسبی ژن‌‌های مرتبط با پروتئین‌‌های شوک حرارتی(HSP27، HSP40، HSP60، HSP70 و HSP90) بین گاوهای سالم و گاوهای دارای مرگ و میر اولیه رویانی مورد بررسی قرار گرفتند. از ژن بتا اکتین به عنوان ژن استاندارد در این پژوهش استفاده شد. مقایسه بین دو گروه با استفاده از آزمون t انجام شد. نتایج نشان داد بیان نسبی ژن ISG15 در گاوهای آبستن به‌‌طور معنی‌‌داری بیشتر از گاوهای دارای مرگ و میر اولیه رویانی بود(6/6 برابر). در بین پروتئین‌‌های شوک حرارتی بیان نسبی ژن‌‌های HSP27 وHSP60 تفاوتی بین گاوهای آبستن و گاوهای دارای مرگ و میر اولیه رویانی نداشت(05/0<P). بیان نسبی ژن‌‌های HSP40،HSP70 و HSP90 در گاوهای آبستن به‌‌طور معنی‌‌داری کمتر از گاوهای دارای مرگ و میر اولیه رویانی بود(به ترتیب7/4، 6/3 و 2/5 برابر). به‌‌طور کلی نتایج پژوهش حاضر نشان داد در بین اعضای خانواده HSP، تنها HSP40، HSP70 و HSP90 با مرگ و اولیه رویانی در گاوهای شیری در ارتباط بودند.

کلیدواژه‌ها


عنوان مقاله [English]

The relationship between heat shock proteins and pregnancy loss in Holstein dairy cows

نویسندگان [English]

  • E. Dirandeh
  • Z. Ansari-pirsaraei
Department of Animal Science, Sari Agricultural Sciences and Natural Resources University, Sari, Mazandaran, Iran
چکیده [English]

The objective of this was to consider relationship between heat shock proteins (HSP) with early embryo loss and pregnancy loss in Holstein dairy cows during summer season. Thirsty-two Holstein cows (with milk production> 30 Kg/d and 3.3±1.7 in parity) were selected. All cows were synchronized by G7G heat synchronization protocol. Blood samples were collected from all cows at d 16 after timed artificial insemination (TAI) to measure ISG15 gene expression. According to ISG15 results, 16 cows showed early embryo loss, then HSP gene family (HSP27, HSP40, HSP60, HSP70 and HSP 90) were compared between healthy cows and those with early embryo loss using t-test. Beta-actin gene was used as a housekeeping gene to compare results. Results showed ISG15 gene expression were greater in pregnant cows compared to early embryo loss (6.6 fold). Among HSP family gene considered in present study, HSP27 and HSP60 gene expression were similar between groups (p < 0.05). HSP40, HSP70 and HSP 90 genes expression were lower in pregnant cows compared to early embryo loss (4.7, 3.6 and 5.2 fold, respectively). In conclusion present study results showed among HSP family, there was an association among HSP40, HSP70 and HSP 90 genes expression and early embryo loss.

کلیدواژه‌ها [English]

  • Gene expression
  • heat shock protein
  • dairy cow
  • early embryo loss
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