بررسی اثرات آنتیاکسیدانی عصاره چای سبز در برابر سمیّت کبدی ایزونیازید در موش صحرایی
محورهای موضوعی :
آسیب شناسی درمانگاهی دامپزشکی
تاریخ دریافت : 1390/08/20
تاریخ پذیرش : 1390/09/03
تاریخ انتشار : 1390/06/01
کلید واژه:
آنتی اکسیدان,
موش صحرایی,
چای سبز,
ایزونیازید,
سمّیت کبدی,
چکیده مقاله :
بیماری سلّ هم چنان به عنوان یک مسئله بهداشت عمومی در سراسر جهان مطرح است. ایزونیازید که به عنوان یک آنتی بیوتیک به طور معمول برای درمان بیماری سلّ مورد استفاده قرار می گیرد، یک عامل توکسیک قوی برای کبد به شمار می رود. هدف از این مطالعه، ارزیابی اثرات آنتی اکسیدانی عصاره چای سبز در مقابل سمیّت کبدی ایزونیازید در موش صحرایی می باشد. موش های صحرایی نر ویستار به طور تصادفی در موشها بهطور تصادفی به 4 گروه 10 سری شامل: 1-گروه شاهد سالم 2- گروه سالم تیمار با عصاره 3-گروه داروی سمی و 4- گروه تیمار با عصاره و داروی سمی تقسیم شدند. از زمان شروع آزمایش تا پایان 8 هفته در گروه های 2 و 4 از محلول عصاره 5/1% برای نوشیدن استفاده شد. در اواسط دوره آزمایش (هفته های چهارم و پنجم آزمایش) به گروه های 3 و 4 داروی ایزونیازید روزانه و به میزان mg/kg50 به صورت داخل صفاقی تزریق گردید. در پایان دوره آزمایش، ماحصل پراکسیداسیون لیپیدی (مالون دی آلدئید)، فعالیت سوپراکسید دسموتاز، کاتالاز، گلوتاتیون پراکسیداز و گلوتاتیون ردوکتاز جهت ارزیابی استرس اکسیداتیو در هموژنات بافت کبد مورد سنجش قرار گرفت. گروه ها توسط آزمون آماری آنالیز واریانس یک طرفه و آزمون تعقیبی توکی با هم مقایسه گردیدند. سطح معنی داری 05/0p< در نظر گرفته شد. عصاره چای سبز به طور معنی داری میزان پراکسیداسیون لیپیدی را کاهش و سطوح آنتی اکسیدان ها را در موش های تیمار شده با ایزونیازید افزایش داد. بررسی حاضر نشان داد که اثرات محافظتی عصاره چای سبز در آسیب اکسیداتیو کبدی ناشی از ایزونیازید، ممکن است با خواص آنتیاکسیدانی و زدایندگی رادیکال آزاد آن مرتبط باشد.
چکیده انگلیسی:
Tuberculosis continues to be a common health problem worldwide. Isoniazid, an antibiotic used routinely for tuberculosis chemotherapy is documented to be a potent hepatotoxicant. The aim of the present study was to assess the antioxidant activity of Green tea extract (GTE) against Isoniazid induced hepatotoxicity in the rats. Male Wistar rats were randomly assigned into 4 groups of 10 animals each including 1- normal healthy control rats, 2- healthy rats receiving (GTE) 3- toxicant control, and 4- toxicant drug+ GTE treatment group. In groups 2 and 4 GTE (1.5%, w/v) was given as only source of drinking for 8 weeks. In the midst stage of experiment (4th and 5th weeks), Isonizid (50 mg/kg b.w./day, i.p.) was administrated for groups 3 and 4 for a period of 2 weeks. At the end of experiment, product of lipid peroxidation (MDA), activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX) and glutathione reductase (GR) were assayed in liver homogenates to evaluate antioxidant activity. Significant differences among the groups were determined by one-way analysis of variance followed by Tukey post-test. Statistical significance was considered at p<0.05. In Isoniazid-treated rats, GTE (1.5%, w/v) significantly decreased the lipid peroxidation and elevated the levels of antioxidant enzymes. This study showed that the hepatoprotective effect of GTE in Isoniazd-induced oxidative damage may be related to its antioxidant and free radical scavenging activity.
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