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Li X, Zheng Y, Zhao X, Cui R, Li X. Relationship between the role of muscarinic M 3 receptors in morphine-induced conditioned place preference and the mesolimbic dopamine system. Neurosci Lett 2022; 786:136774. [PMID: 35809878 DOI: 10.1016/j.neulet.2022.136774] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 07/04/2022] [Accepted: 07/04/2022] [Indexed: 11/18/2022]
Abstract
Opioid use disorder mainly results from functional defects in the brain reward loop, which includs the ventral tegmental area (VTA) and nucleus accumbens (NAc; consisting of shell and core, NAcS and NAcC). Reward effects contribute to opioid use disorder. RMTg M3 receptors play a role in opioid reward by regulating the γ-aminobutyric acid (GABA) neuron activity. Dopamine D1 receptors expressed on GABA neurons regulate opioid reward by mediating the dopamine neuron activity in the VTA. Therefore, we investigated the effect of activating M3 receptors by microinjecting pilocarpine into the RMTg along with activating D1 receptors by microinjecting SKF38393 into the VTA on morphine-induced reward effect, using the conditioned place preference (CPP) paradigm (locomotion was also recorded). We also investigated whether the activation of M3 receptors in the RMTg influenced dopamine release in the NAcS. The results showed that the inhibitory role of RMTg pilocarpine (60 μg/rat) infusions in morphine-induced CPP was reversed by VTA SKF38393 (4 μg/rat) infusions. Moreover, morphine (5 mg/kg, i.p.) increased dopamine release in the NAcS, which was blunted by microinjecting pilocarpine (60 μg/rat) into the RMTg. These results indicate that RMTg M3 receptors mediate morphine-induced reward effect, which is probably related to the dopamine activity within the VTA and NAcS. The relationship between RMTg M3 receptors and the mesolimbic dopamine system could be a potential direction for the treatment of opioid use disorder, but further verification through more comprehensive techniques is needed.
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Affiliation(s)
- Xuhong Li
- Beijing Key Laboratory of Learning and Cognition, Capital Normal University, Beijing, China; Department of Education, Luliang University, Shanxi, China
| | - Yuqian Zheng
- Beijing Key Laboratory of Learning and Cognition, Capital Normal University, Beijing, China
| | - Xiaoxuan Zhao
- Beijing Key Laboratory of Learning and Cognition, Capital Normal University, Beijing, China; School of Education, Cangzhou Normal University, Hebei, China
| | - Ruisi Cui
- Beijing Key Laboratory of Learning and Cognition, Capital Normal University, Beijing, China.
| | - Xinwang Li
- Beijing Key Laboratory of Learning and Cognition, Capital Normal University, Beijing, China.
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Custodio RJP, Kim M, Sayson LV, Ortiz DM, Buctot D, Lee HJ, Cheong JH, Kim HJ. Regulation of clock and clock-controlled genes during morphine reward and reinforcement: Involvement of the period 2 circadian clock. J Psychopharmacol 2022; 36:875-891. [PMID: 35486444 DOI: 10.1177/02698811221089040] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Morphine abuse is a devastating disorder that affects millions of people worldwide, and literature evidence indicates a relationship between opioid abuse and the circadian clock. AIM We explored morphine reward and reinforcement using mouse models with Per2 gene modifications (knockout (KO); overexpression (OE)). METHODS Mice were exposed to various behavioral, electroencephalographic, pharmacological, and molecular tests to assess the effects of morphine and identify the underlying mechanisms with a focus on reward and reinforcement and the corresponding involvement of circadian and clock-controlled gene regulation. RESULTS Per2 deletion enhances morphine-induced analgesia, locomotor sensitization, conditioned place preference (CPP), and self-administration (SA) in mice, whereas its overexpression attenuated these effects. In addition, reduced withdrawal was observed in Per2 KO mice, whereas an augmented withdrawal response was observed in Per2 OE mice. Moreover, naloxone and SCH 23390 blocked morphine CPP in Per2 KO and wild-type (WT) mice. The rewarding (CPP) and reinforcing effects (SA) observed in morphine-conditioned and morphine self-administered Per2 KO and WT mice were accompanied by activated μ-opioid and dopamine D1 receptors and TH in the mesolimbic (VTA/NAcc) system. Furthermore, genetic modifications of Per2 in mice innately altered some clock genes in response to morphine. CONCLUSION These findings improve our understanding of the role of Per2 in morphine-induced psychoactive effects. Our data and those obtained in previous studies indicate that targeting Per2 may have applicability in the treatment of substance abuse.
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Affiliation(s)
- Raly James Perez Custodio
- School of Pharmacy, Jeonbuk National University, Jeonju-si, Republic of Korea.,Uimyung Research Institute for Neuroscience, Department of Pharmacy, Sahmyook University, Seoul, Republic of Korea
| | - Mikyung Kim
- Department of Chemistry & Life Science, Sahmyook University, Seoul, Republic of Korea
| | - Leandro Val Sayson
- Uimyung Research Institute for Neuroscience, Department of Pharmacy, Sahmyook University, Seoul, Republic of Korea
| | - Darlene Mae Ortiz
- Uimyung Research Institute for Neuroscience, Department of Pharmacy, Sahmyook University, Seoul, Republic of Korea
| | - Danilo Buctot
- Uimyung Research Institute for Neuroscience, Department of Pharmacy, Sahmyook University, Seoul, Republic of Korea
| | - Hyun Jun Lee
- Uimyung Research Institute for Neuroscience, Department of Pharmacy, Sahmyook University, Seoul, Republic of Korea
| | - Jae Hoon Cheong
- School of Pharmacy, Jeonbuk National University, Jeonju-si, Republic of Korea
| | - Hee Jin Kim
- Uimyung Research Institute for Neuroscience, Department of Pharmacy, Sahmyook University, Seoul, Republic of Korea
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Bae EH, Lim SY, Jung JH, Oh TR, Choi HS, Kim CS, Ma SK, Han KD, Kim SW. Obesity, Abdominal Obesity and Chronic Kidney Disease in Young Adults: A Nationwide Population-Based Cohort Study. J Clin Med 2021; 10:jcm10051065. [PMID: 33806552 PMCID: PMC7962022 DOI: 10.3390/jcm10051065] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 02/25/2021] [Indexed: 11/17/2022] Open
Abstract
Obesity has become a pandemic. It is one of the strongest risk-factors of new-onset chronic kidney disease (CKD). However, the effects of obesity and abdominal obesity on the risk of developing CKD in young adults has not been elucidated. From a nationwide health screening database, we included 3,030,884 young adults aged 20–39 years without CKD during a baseline examination in 2009–2010, who could follow up during 2013–2016. Patients were stratified into five levels based on their baseline body mass index (BMI) and six levels based on their waist circumference (WC; 5-cm increments). The primary outcome was the development of CKD. During the follow up, until 2016, 5853 (0.19%) participants developed CKD. Both BMI and WC showed a U-shaped relationship with CKD risk, identifying the cut-off values as a BMI of 21 and WC of 72 cm in young adults. The obesity group (odd ratio [OR] = 1.320, 95% confidence interval [CI]: 1.247–1.397) and abdominal obesity group (male WC ≥ 90, female WC ≥ 85) (OR = 1.208, 95%CI: 1.332–1.290) showed a higher CKD risk than the non-obesity or non-abdominal obesity groups after adjusting for covariates. In the CKD risk by obesity composite, the obesity displayed by the abdominal obesity group showed the highest CKD risk (OR = 1.502, 95%CI: 1.190–1.895), especially in those under 30 years old. During subgroup analysis, the diabetes mellitus (DM) group with obesity or abdominal obesity paradoxically showed a lower CKD risk compared with the non-obesity or non-abdominal obesity group. Obesity and abdominal obesity are associated with increased risk of developing CKD in young adults but a decreased risk in young adults with diabetes.
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Affiliation(s)
- Eun Hui Bae
- Department of Internal Medicine, Chonnan National University Medical School, Gwangju 61469, Korea; (E.H.B.); (T.R.O.); (H.S.C.); (C.S.K.); (S.K.M.)
- Department of Internal Medicine, Chonnam National University Hospital, Gwangju 61469, Korea
| | - Sang Yeob Lim
- Department of Internal Medicine, Korea University Ansan Hospital, Ansan 15459, Korea;
| | - Jin-Hyung Jung
- Department of Medical Statistics, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea;
| | - Tae Ryom Oh
- Department of Internal Medicine, Chonnan National University Medical School, Gwangju 61469, Korea; (E.H.B.); (T.R.O.); (H.S.C.); (C.S.K.); (S.K.M.)
- Department of Internal Medicine, Chonnam National University Hospital, Gwangju 61469, Korea
| | - Hong Sang Choi
- Department of Internal Medicine, Chonnan National University Medical School, Gwangju 61469, Korea; (E.H.B.); (T.R.O.); (H.S.C.); (C.S.K.); (S.K.M.)
- Department of Internal Medicine, Chonnam National University Hospital, Gwangju 61469, Korea
| | - Chang Seong Kim
- Department of Internal Medicine, Chonnan National University Medical School, Gwangju 61469, Korea; (E.H.B.); (T.R.O.); (H.S.C.); (C.S.K.); (S.K.M.)
- Department of Internal Medicine, Chonnam National University Hospital, Gwangju 61469, Korea
| | - Seong Kwon Ma
- Department of Internal Medicine, Chonnan National University Medical School, Gwangju 61469, Korea; (E.H.B.); (T.R.O.); (H.S.C.); (C.S.K.); (S.K.M.)
- Department of Internal Medicine, Chonnam National University Hospital, Gwangju 61469, Korea
| | - Kyung-Do Han
- Department of Statistics and Actuarial Science, Soongsil Universithy, Seoul 06978, Korea
- Correspondence: (K.-D.H.); (S.W.K.); Tel.: +82-2-820-7025 (K.-D.H.); +82-62-220-6271 (S.W.K.)
| | - Soo Wan Kim
- Department of Internal Medicine, Chonnan National University Medical School, Gwangju 61469, Korea; (E.H.B.); (T.R.O.); (H.S.C.); (C.S.K.); (S.K.M.)
- Department of Internal Medicine, Chonnam National University Hospital, Gwangju 61469, Korea
- Correspondence: (K.-D.H.); (S.W.K.); Tel.: +82-2-820-7025 (K.-D.H.); +82-62-220-6271 (S.W.K.)
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