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Ou CY, Yu YH, Wu CW, Kozłowska A, Shyu BC, Huang ACW. Neuronal activity of the medial prefrontal cortex, nucleus accumbens, and basolateral amygdala in conditioned taste aversion and conditioned place preference induced by different doses of morphine administrations in rats. Front Pharmacol 2023; 14:1062169. [PMID: 36762112 PMCID: PMC9902353 DOI: 10.3389/fphar.2023.1062169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 01/13/2023] [Indexed: 01/25/2023] Open
Abstract
To re-examine the paradoxical effect hypothesis of abused drugs, the present study concerned whether different doses of morphine disparately affect neuronal activity and associations among the subareas of the medial prefrontal cortex (mPFC: cingulate cortex 1-Cg1, prelimbic cortex-PrL, infralimbic cortex-IL), the subregions of the nucleus accumbens (NAc; both core and shell), and the basolateral amygdala (BLA) following conditioned taste aversion (CTA) and conditioned place preference (CPP). All rats were given a 0.1% saccharin solution for 15-min, and they were intraperitoneally injected with saline or 20, 30, or 40 mg/kg morphine to form the aversive CTA learning. Later, half of the rats were tested for CPP (including the CTA and then CPP tests) for 30-min. Finally, the immunohistochemical staining with c-Fos was conducted after the behavioral test. After the CTA test, c-Fos (%) in the Cg1 and PrL (but not the IL) was more in 20-40 mg/kg of the morphine groups; c-Fos (%) in the NAc core, NAc shell, and BLA was more in the 30-40 mg/kg morphine group. After the CPP test, the Cg1, PrL, IL, and BLA showed more c-Fos (%) in 20 mg/kg morphine; the NAc core showed fewer in c-Fos (%) in the 30-40 mg/kg morphine groups. The mPFC subregions (e.g., Cg1, PrL, and IL), NAc subareas (e.g., NAc core and NAc shell), and BLA were involved in the different doses of morphine injections. The correlation analysis showed that a positive correlation was observed between PrL and IL with NAc core with low doses of morphine and with NAc shell with increasing doses of morphine after the CTA test. After the CPP, an association between PrL and NAc core and NAc shell at low doses and between IL and BLA and NAc shell with increasing doses of morphine. Therefore, different neural substrates and the neural connectivity are observed following different doses of morphine and after the CTA and CPP tests. The present data extend the paradoxical effect hypothesis of abused drugs.
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Affiliation(s)
- Chen Yin Ou
- Department of Psychology, Fo GuangUniversity, Jiaoxi, Yilan County, Taiwan
| | - Ying Hao Yu
- Department of Psychology, Fo GuangUniversity, Jiaoxi, Yilan County, Taiwan,Department of Biotechnology and Animal Science, National ILan University, Yilan, Taiwan
| | - Chi-Wen Wu
- Department of Psychology, Fo GuangUniversity, Jiaoxi, Yilan County, Taiwan,Department of Pharmacy, Keelung Hospital, Ministry of Health and Welfare, Keelung City, Taiwan
| | - Anna Kozłowska
- Department of Human Physiology and Pathology, School Medicine, Collegium Medicum, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Bai-Chung Shyu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan,*Correspondence: Bai-Chung Shyu, ; Andrew Chih Wei Huang,
| | - Andrew Chih Wei Huang
- Department of Psychology, Fo GuangUniversity, Jiaoxi, Yilan County, Taiwan,*Correspondence: Bai-Chung Shyu, ; Andrew Chih Wei Huang,
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Heinsbroek JA, De Vries TJ, Peters J. Glutamatergic Systems and Memory Mechanisms Underlying Opioid Addiction. Cold Spring Harb Perspect Med 2021; 11:cshperspect.a039602. [PMID: 32341068 DOI: 10.1101/cshperspect.a039602] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Glutamate is the main excitatory neurotransmitter in the brain and is of critical importance for the synaptic and circuit mechanisms that underlie opioid addiction. Opioid memories formed over the course of repeated drug use and withdrawal can become powerful stimuli that trigger craving and relapse, and glutamatergic neurotransmission is essential for the formation and maintenance of these memories. In this review, we discuss the mechanisms by which glutamate, dopamine, and opioid signaling interact to mediate the primary rewarding effects of opioids, and cover the glutamatergic systems and circuits that mediate the expression, extinction, and reinstatement of opioid seeking over the course of opioid addiction.
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Affiliation(s)
- Jasper A Heinsbroek
- Department of Anesthesiology, University of Colorado School of Medicine, Aurora, Colorado 80045, USA
| | - Taco J De Vries
- Amsterdam Neuroscience, Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Faculty of Earth and Life Sciences, VU University, 1081HV Amsterdam, The Netherlands.,Amsterdam Neuroscience, Department of Anatomy and Neurosciences, VU University Medical Center, 1081HZ Amsterdam, The Netherlands
| | - Jamie Peters
- Department of Anesthesiology, University of Colorado School of Medicine, Aurora, Colorado 80045, USA
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Abstract
This paper is the forty-first consecutive installment of the annual anthological review of research concerning the endogenous opioid system, summarizing articles published during 2018 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides and receptors as well as effects of opioid/opiate agonists and antagonists. The review is subdivided into the following specific topics: molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors (2), the roles of these opioid peptides and receptors in pain and analgesia in animals (3) and humans (4), opioid-sensitive and opioid-insensitive effects of nonopioid analgesics (5), opioid peptide and receptor involvement in tolerance and dependence (6), stress and social status (7), learning and memory (8), eating and drinking (9), drug abuse and alcohol (10), sexual activity and hormones, pregnancy, development and endocrinology (11), mental illness and mood (12), seizures and neurologic disorders (13), electrical-related activity and neurophysiology (14), general activity and locomotion (15), gastrointestinal, renal and hepatic functions (16), cardiovascular responses (17), respiration and thermoregulation (18), and immunological responses (19).
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, Flushing, NY, 11367, United States.
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Zhu Z, Ye Z, Wang H, Hua T, Wen Q, Zhang C. Theta-gamma coupling in the prelimbic area is associated with heroin addiction. Neurosci Lett 2019; 701:26-31. [PMID: 30769004 DOI: 10.1016/j.neulet.2019.02.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 02/02/2019] [Accepted: 02/11/2019] [Indexed: 01/27/2023]
Abstract
The medial prefrontal cortex (mPFC) is implicated in the regulation of drug-seeking behavior, but the specific contributions of the mPFC prelimbic (PL) subdivision and the precise mechanisms underlying heroin abuse remain largely unclear. In the present study, we examined changes in the rhythmic ensemble activity of PL neurons after induction of heroin addiction in rats. Rats were injected daily with saline (control group) or heroin (addiction group) in the light chamber of a light-dark shuttle box, and a video tracking system was used to measure conditioned place preference (CPP) as a sign of addiction. A wireless telemetry system was used to record local field potentials (LFPs) from the PL area during expression of CPP. Before treatment, there was no difference in CPP between groups (P > 0.05). However, rats in the experimental group exhibited significant CPP (P < 0.05) in the light chamber after heroin treatment compared to before treatment and compared to control rats. During CPP, addicted rats demonstrated substantial alterations in relative θ and γ frequency band power (Ps < 0.05); moreover, the θ wave alteration was strongly coupled to γ waves in heat map analyses (P < 0.05). Collectively, these findings implicate heroin-induced alterations in PL area neural activity and θ-γ coupling in heroin addiction.
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Affiliation(s)
- Zaiman Zhu
- College of Life Sciences, Anhui Normal University, Wuhu 241000, China; Department of Physiology, Wannan Medical College, Wuhu 241000, China
| | - Zheng Ye
- Department of Physiology, Wannan Medical College, Wuhu 241000, China
| | - Hui Wang
- Department of Physiology, Wannan Medical College, Wuhu 241000, China
| | - Tianmiao Hua
- College of Life Sciences, Anhui Normal University, Wuhu 241000, China.
| | - Qingyun Wen
- Department of Psychology & Key Laboratory of Psychological Assessment and Rehabilitation for Exceptional Children, Lingnan Normal University, Zhanjiang 524048, China
| | - Changzheng Zhang
- Department of Psychology & Key Laboratory of Psychological Assessment and Rehabilitation for Exceptional Children, Lingnan Normal University, Zhanjiang 524048, China.
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