اثرات تزریق عوامل دوپامینرژیک گیرنده‌های D2 در هسته لوکوس سرولئوس بر علائم قطع مصرف نالوکسان در موشهای صحرایی وابسته به مرفین
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Background: Opiate-induced addiction is a main social problem in Iran. As treatment of this problem is a health priority among the medical community, studies on this topic are very crucial. The exact mechanism of dependence on opiates and their withdrawal syndrome remain unclear. It seems that dopaminergic system and locus coeruleus (LC) have an important role in the expression of somatic signs during opioids withdrawal. The LC has been shown to contain significant levels of dopamine (DA). In the present study, the effects of different D2 dopaminergic receptor agonist and antagonist administration in the LC on withdrawal sign expression in morphine dependence is investigated in rats. Methods: Adult male Wistar rats, weighing 220–280 g were divided into eight groups (n=8). Two cannulae were stereotaxically implanted bilaterally into the LC of each rat. After a one-week recovery, seven groups were rendered dependent on morphine by subcutaneous injection during a seven-day period. Non-dependent control animals received saline according to the same protocol. Animals received bilateral intra-LC injections of saline (1 μg/site) and quinpirole (0.1, 0.3 and 0.5 μg/site, a D2 agonist) 15 min and sulpiride (5, 15 and 30 μg/site, a D2 antagonist) 30 min prior to naloxone injection about 24 hours after the last dose of morphine or saline according to their respective group. To calculate the total withdrawal score, as an index of withdrawal syndrome, 20 different withdrawal signs were assessed and the scores of the intensity of these withdrawal signs were added. Results: Total withdrawal scores were significantly decreased by quinpirole (0.1µg/site) and sulpiride (15 and 30 µg/site).Conclusion: The D2 dopaminergic system in the LC may be involved in the morphine-induced dependency in rats. Further studies are needed to define the mechanism of this dependency in order to improve methods for the rehabilitation of addicts.
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اثر بربرین در تنظیم آستروسیتهای Gfap+ ناحیه هیپوکمپ موشهای صحرایی دیابتی شده با استرپتوزوتوسین
Background: Diabetes mellitus increases the risk of central nervous system (CNS) disorders such as stroke, seizures, dementia, and cognitive impairment. Berberine, a natural isoquinolne alkaloid, is reported to exhibit beneficial effect in various neurodegenerative and neuropsychiatric disorders. Moreover astrocytes are proving critical for normal CNS function, and alterations in their activity...
full textاثر بربرین در تنظیم آستروسیتهای Gfap+ ناحیه هیپوکمپ موشهای صحرایی دیابتی شده با استرپتوزوتوسین
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full textتزریق اورکسین A به داخل هسته لوکوس سرولئوس در موشهای صحرایی غیر وابسته به مورفین
Introduction: Orexin neuropeptide has a role in opioid withdrawal behaviors. Orexin-expressing neurons that are present in the hypothalamic nuclei send dense projections to the Locus Coeruleus (LC). Withdrawal syndrome is temporally associated with hyperactivity of LC neurons. LC neurons do not show withdrawal-induced hyperactivity in brain slices from morphine-dependent rats. Thus, it has been...
full textاثر تزریق کلونیدین به درون هسته پاراژیگانتوسلولاریس جانبی بر علائم قطع مصرف مرفین در موش صحرایی نر وابسته به مرفین
خلاصهسابقه و هدف: هسته پاراژیگانتوسلولاریس (lpgi) در بصل النخاع قرار داشته و در اعمال مختلف فیزیولوژیک نقش دارد. در پژوهش حاضر به بررسی اثر تزریق کلونیدین به درون هسته پاراژیگانتوسلولاریس بر سندرم ترک مرفین پرداخته شده است.مواد و روش ها: بعد از اعمال جراحی و کانول گذاری در هسته lpgi، وابستگی به مرفین طی چهار روز و هر روز دوبار به ترتیب 35،30،25و40 میلی گرم بر کیلوگرم مرفین به صورت داخل صفاقی تز...
full textاثرات تزریق عصاره بابونه به درون هسته پاراژیگانتوسلولاریس مغز بر علایم قطع مصرف مرفین در موش سفید صحرایی
سابقه و هدف: گزارش های قبلی نشان داده اند که استفاده از عصاره گیاه بابونه همراه با مرفین، وابستگی به مرفین را به میزان زیادی کاهش می دهد و تزریق آن قبل از نالوکسان، از بروز سندرم ترک جلوگیری می کند. هسته های لکوس سرولئوس (Lc) و پاراژیگانتوسلولاریس (PGi) در بروز علایم ترک اعتیاد نقش مهمی دارند. این مطالعه به منظور تعین اثرات تزریق عصاره بابونه به درون هسته پاراژیگانتوسلولاریس مغز بر علایم قطع مص...
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Journal title
volume 65 issue None
pages 7- 12
publication date 2007-06
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