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Research in Pharmaceutical Sciences، جلد ۱۴، شماره ۱، صفحات ۴۶-۵۴
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عنوان انگلیسی Acute and chronic effects of morphine on Low-Mg2+ ACSF-induced epileptiform activity during infancy in mice hippocampal slices
چکیده انگلیسی مقاله Interaction of morphine and seizure is complex. Mouse brain hippocampal slices were used to estimate how acute and chronic morphine treatment alters the low-magnesium artificial cerebrospinal fluid (LM-ACSF)-induced seizure activity. Hippocampal slices were taken from the normal and morphine-treated mice. The normal mice received saline while the other group (morphine-treated mice) received morphine daily for 5 consecutive days. Saline/morphine administration was performed subcutaneously (s.c, 0.1 mL) at postnatal days 14-18. Hippocampal slices of all animals were perfused with LM-ACSF followed by different morphine concentrations (0, 10, 100, and 1000 µM) or naloxone (10 µM). Changes in the spike count were considered as indices for quantifying the seizure activity in the slices. In hippocampus of both groups perfused with 10 or 1000 µM morphine, epileptiform activity was suppressed while it was potentiated at 100 µM morphine. The excitatory effect of morphine at 100 µM was stronger in normal mice (acute exposure) than in dependent mice (chronic exposure). Naloxone suppressed the epileptiform activities in both groups. Suppressive effect of naloxone was more significant in morphine-treated mice than in normal mice. The seizure activity in morphine-dependent mice was more labile than that of normal mice. It can be concluded that morphine had a biphasic effect on LM-ACSF-induced epileptiform activities in both groups. The occurrence of seizure was comparable in acute and chronic exposure of morphine but strength of the effect was considerably robust in normal mice. The down regulation of opioid receptors in chronic exposure is likely to be responsible for these differences.
کلیدواژه‌های انگلیسی مقاله Epilepsy,Infancy,Morphine,Neonatal,Seizure.
نویسندگان مقاله | Yousef Panahi
2Neurophysiology Research Center, Urmia University of Medical Sciences, Urmia, I.R. Iran.


| Ehsan Saboory
3Department of physiology, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, I.R. Iran.


| Shiva Roshan-Milani
2Neurophysiology Research Center, Urmia University of Medical Sciences, Urmia, I.R. Iran.


| Leila Drafshpoor
4Cellular and Molecular Research Center, Urmia University of Medical Sciences, Urmia, I.R. Iran.


| Yousef Rasmi
1Department of Pharmacology, Faculty of Veterinary Medicine, University of Tehran, Tehran, I.R. Iran.


| Ali Rassouli
1Department of Pharmacology, Faculty of Veterinary Medicine, University of Tehran, Tehran, I.R. Iran.


| Goudarz Sadeghi-Hashjin


نشانی اینترنتی http://rps.mui.ac.ir/index.php/jrps/article/view/1877
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/115/article-115-1262570.pdf
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Original Article
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