Influence of Selective Dopamine Agonist Ropinirole on Conditioned Place Preference and Somatic Signs of Morphine Withdrawal in Rats
The underlying mechanism of dependence and rewarding effects of morphine is imperative to understand. The primary aim of this study was to investigate whether ropinirole D2/3 agonist affects the rewarding and reinforcing properties of morphine-induced conditioned place preference (CPP) and withdrawa...
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Frontiers Media S.A.
2022-06-01
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| Series: | Frontiers in Behavioral Neuroscience |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fnbeh.2022.855241/full |
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| author | Andleeb Shahzadi Oruc Yunusoglu Oruc Yunusoglu Enes Karabulut Enes Karabulut Haktan Sonmez Zeliha Yazici Zeliha Yazici |
| author_facet | Andleeb Shahzadi Oruc Yunusoglu Oruc Yunusoglu Enes Karabulut Enes Karabulut Haktan Sonmez Zeliha Yazici Zeliha Yazici |
| author_sort | Andleeb Shahzadi |
| collection | DOAJ |
| description | The underlying mechanism of dependence and rewarding effects of morphine is imperative to understand. The primary aim of this study was to investigate whether ropinirole D2/3 agonist affects the rewarding and reinforcing properties of morphine-induced conditioned place preference (CPP) and withdrawal syndromes in rats. On day one, the animals were randomly divided to conduct the pre-test. The morphine (10 mg/kg, i.p.) and/or saline was administered on alternate days in an 8-day CPP session. On day 10, 15 min prior to the post-conditioning test (expression), a single dose of ropinirole (1, 2, and 5 mg/kg, i.p.) was given to rats. In extinction session, ropinirole was injected daily, and CPP was extinguished by repeated testing, with intervals of 3 days. Finally, reinstatement was assessed by administering ropinirole (1, 2, and 5 mg/kg) 15 min before the morphine injection. Morphine dependence was developed by administering increasing doses of morphine (10–50 mg/kg, i.p.). To assess withdrawal symptoms, ropinirole (1, 2, and 5 mg/kg) was injected 15 min before naloxone (2 mg/kg, s.c.) administration. The present study confirms that ropinirole attenuates expression and reinstatement of CPP, while it precipitates the extinction of morphine-induced CPP. Naloxone-precipitated morphine withdrawal symptoms, including wet dog shakes and weight loss, were attenuated although jumping was increased by a single ropinirole injection. Thus, ropinirole was influential in attenuating expression, reducing drug seeking and weakening reinstatement via the dopaminergic system. These findings show that ropinirole might affect neuro-adaptive changes related to dependence. |
| first_indexed | 2024-12-12T08:12:51Z |
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| institution | Directory Open Access Journal |
| issn | 1662-5153 |
| language | English |
| last_indexed | 2024-12-12T08:12:51Z |
| publishDate | 2022-06-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Behavioral Neuroscience |
| spelling | doaj.art-9a9e0f09f80e488180a1b3f2f9d6ea002022-12-22T00:31:43ZengFrontiers Media S.A.Frontiers in Behavioral Neuroscience1662-51532022-06-011610.3389/fnbeh.2022.855241855241Influence of Selective Dopamine Agonist Ropinirole on Conditioned Place Preference and Somatic Signs of Morphine Withdrawal in RatsAndleeb Shahzadi0Oruc Yunusoglu1Oruc Yunusoglu2Enes Karabulut3Enes Karabulut4Haktan Sonmez5Zeliha Yazici6Zeliha Yazici7Department of Medical Pharmacology, Faculty of Medicine-Cerrahpasa, Istanbul University-Cerrahpasa, Istanbul, TurkeyDepartment of Medical Pharmacology, Faculty of Medicine-Cerrahpasa, Istanbul University-Cerrahpasa, Istanbul, TurkeyDepartment of Medical Pharmacology, Faculty of Medicine, Bolu Abant Izzet Baysal University, Bolu, TurkeyDepartment of Medical Pharmacology, Faculty of Medicine-Cerrahpasa, Istanbul University-Cerrahpasa, Istanbul, TurkeyMehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, TurkeyDepartment of Medical Pharmacology, Faculty of Medicine-Cerrahpasa, Istanbul University-Cerrahpasa, Istanbul, TurkeyDepartment of Medical Pharmacology, Faculty of Medicine-Cerrahpasa, Istanbul University-Cerrahpasa, Istanbul, TurkeyDepartment of Medical Pharmacology, Faculty of Medicine, Biruni University, Istanbul, TurkeyThe underlying mechanism of dependence and rewarding effects of morphine is imperative to understand. The primary aim of this study was to investigate whether ropinirole D2/3 agonist affects the rewarding and reinforcing properties of morphine-induced conditioned place preference (CPP) and withdrawal syndromes in rats. On day one, the animals were randomly divided to conduct the pre-test. The morphine (10 mg/kg, i.p.) and/or saline was administered on alternate days in an 8-day CPP session. On day 10, 15 min prior to the post-conditioning test (expression), a single dose of ropinirole (1, 2, and 5 mg/kg, i.p.) was given to rats. In extinction session, ropinirole was injected daily, and CPP was extinguished by repeated testing, with intervals of 3 days. Finally, reinstatement was assessed by administering ropinirole (1, 2, and 5 mg/kg) 15 min before the morphine injection. Morphine dependence was developed by administering increasing doses of morphine (10–50 mg/kg, i.p.). To assess withdrawal symptoms, ropinirole (1, 2, and 5 mg/kg) was injected 15 min before naloxone (2 mg/kg, s.c.) administration. The present study confirms that ropinirole attenuates expression and reinstatement of CPP, while it precipitates the extinction of morphine-induced CPP. Naloxone-precipitated morphine withdrawal symptoms, including wet dog shakes and weight loss, were attenuated although jumping was increased by a single ropinirole injection. Thus, ropinirole was influential in attenuating expression, reducing drug seeking and weakening reinstatement via the dopaminergic system. These findings show that ropinirole might affect neuro-adaptive changes related to dependence.https://www.frontiersin.org/articles/10.3389/fnbeh.2022.855241/fullmorphineconditioned place preferenceropinirolewithdrawal syndromeexpressionreinstatement |
| spellingShingle | Andleeb Shahzadi Oruc Yunusoglu Oruc Yunusoglu Enes Karabulut Enes Karabulut Haktan Sonmez Zeliha Yazici Zeliha Yazici Influence of Selective Dopamine Agonist Ropinirole on Conditioned Place Preference and Somatic Signs of Morphine Withdrawal in Rats Frontiers in Behavioral Neuroscience morphine conditioned place preference ropinirole withdrawal syndrome expression reinstatement |
| title | Influence of Selective Dopamine Agonist Ropinirole on Conditioned Place Preference and Somatic Signs of Morphine Withdrawal in Rats |
| title_full | Influence of Selective Dopamine Agonist Ropinirole on Conditioned Place Preference and Somatic Signs of Morphine Withdrawal in Rats |
| title_fullStr | Influence of Selective Dopamine Agonist Ropinirole on Conditioned Place Preference and Somatic Signs of Morphine Withdrawal in Rats |
| title_full_unstemmed | Influence of Selective Dopamine Agonist Ropinirole on Conditioned Place Preference and Somatic Signs of Morphine Withdrawal in Rats |
| title_short | Influence of Selective Dopamine Agonist Ropinirole on Conditioned Place Preference and Somatic Signs of Morphine Withdrawal in Rats |
| title_sort | influence of selective dopamine agonist ropinirole on conditioned place preference and somatic signs of morphine withdrawal in rats |
| topic | morphine conditioned place preference ropinirole withdrawal syndrome expression reinstatement |
| url | https://www.frontiersin.org/articles/10.3389/fnbeh.2022.855241/full |
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