مطالعه اثرات محافظتی کروسین بر آسیب ایسکمی-بازخونرسانی تجربی کبد در موش صحرایی

محورهای موضوعی : آسیب شناسی درمانگاهی دامپزشکی

بهرام عمواوغلی تبریزی ¹ ( دانشیار گروه آموزشی علوم درمانگاهی، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران. )
داریوش مهاجری ² ( استاد گروه آموزشی پاتوبیولوژی، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران. )

تاریخ دریافت : 1394/03/14 تاریخ پذیرش : 1394/06/28 تاریخ انتشار : 1394/06/01

کلید واژه: کبد, موش صحرایی, ایسکمی-بازخونرسانی, کروسین,

چکیده مقاله :

خونرسانی مجدد پس از ایسکمی ممکن است باعث بروز آسیب های متابولیکی و ساختاری در کبد شود. هدف از این مطالعه ارزیابی تاثیر کروسین بر آسیب ایسکمی-بازخونرسانی کبد در موش های صحرایی بود. بدین منظور 40 سر موش صحرایی نژاد ویستار به‌طور تصادفی به چهار گروه 10 تایی تقسیم شدند: 1- گروه شاهد: موش های دستکاری نشده؛ 2- گروه کنترل جراحی: موش هایی که تحت جراحی به جز ایسکمی-بازخونرسانی قرار گرفته و نرمال سالین دریافت کردند؛ 3- گروه ایسکمی-بازخونرسانی: موش هایی که 45 دقیقه تحت ایسکمی، سپس 45 دقیقه دیگر در معرض خونرسانی مجدد کبد قرار گرفتند؛ 4- گروه ایسکمی-بازخونرسانی و تیمار با کروسین: موش هایی که با کروسین (200 میلی گرم بر کیلوگرم، داخل صفاقی) مورد پیش درمانی قرار گرفتند. موش ها پس از اخذ نمونه های خون و بافت کبد آسان کشی شدند. آلانین آمینو ترانسفراز، آسپارتات آمینو ترانسفراز و لاکتات دهیدروژناز سرم اندازه گیری شد. مالون دی آلدئید و فعالیت آنزیم های سوپراکسید دیسموتاز، کاتالاز، گلوتاتیون پراکسیداز و گلوتاتیون ردوکتاز در هموژنات بافت کبد اندازه گیری شد. همچنین، آسیب شناسی بافتی کبد توسط میکروسکوپ نوری انجام شد. در گروه 4، کروسین به‌طور معنی‌داری (001/0>p) میزان افزایش یافته آنزیم‌های شاخص آسیب کبد را کاهش و به طور معنی داری (001/0>p) میزان پراکسیداسیون لیپیدی را کاهش و سطوح کاهش یافته آنتی اکسیدان های کبد را افزایش داد. آسیب بافتی به طور معنی داری در کبدهای تیمار شده با کروسین کاهش پیدا کرد. این نتایج نشان می دهد که کروسین با خواص آنتی‌اکسیدانی خود، دارای اثرات محافظتی در برابر آسیب ایسکمی-بازخونرسانی کبد بوده و انتخاب مناسبی برای درمان آسیب های مرتبط با ایسکمی-بازخونرسانی کبد می باشد.

چکیده انگلیسی:

   Ischemia followed by reperfusion (I/R) may cause metabolic and structural hepatic damage. The aim of this study was to investigate the effects of crocin on liver ischemia/reperfusion (I/R) injury in rats. For this purpose a total of 40 male Wistar rats were randomized into four groups of ten: (1) controls: including unmanipulated rats; (2) sham group: rats subjected to the surgical procedure, except for liver I/R, and given saline; (3) I/R group: rats underwent liver ischemia for 45 minutes followed by reperfusion for 45 minutes; (4) I-R/Crocin group: rats pretreated with crocin (200 mg/kg, ip). Blood samples and liver tissues were harvested from the rats, and then the rats were sacrificed. Serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), and lactate dehydrogenase (LDH) levels were determined. Malondialdehyde (MDA) and activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and glutathione reductase (GR) were assayed in liver homogenates. Also liver tissue histopathology was evaluated by light microscopy. In group 4, crocin significantly (p<0.001) decreased the elevated levels of serum biomarkers of hepatic injury and significantly (p<0.001) decreased the lipid peroxidation and elevated the decreased values of hepatic antioxidants. Histopathological changes were significantly attenuated in crocin-treated livers. These results suggest that crocin because of its anti-oxidant potential, has protective effects against hepatic I/R injury, and is a potential therapeutic drug for ischemia reperfusion-related liver injury.

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