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Pan Y, Cai Z, Wang Y, Zhang J, Sheng H, Shao D, Cui D, Guo X, Zheng P, Lai B. Formation of chronic morphine withdrawal memories requires C1QL3-mediated regulation of PSD95 in the mouse basolateral amygdala. Biochem Biophys Res Commun 2024; 720:150076. [PMID: 38772224 DOI: 10.1016/j.bbrc.2024.150076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 04/24/2024] [Accepted: 05/07/2024] [Indexed: 05/23/2024]
Abstract
Chronic morphine withdrawal memory formation is a complex process influenced by various molecular mechanisms. In this study, we aimed to investigate the contributions of the basolateral amygdala (BLA) and complement component 1, q subcomponent-like 3 (C1QL3), a secreted and presynaptically targeted protein, to the formation of chronic morphine (repeat dosing of morphine) withdrawal memory using conditioned place aversion (CPA) and chemogenetic methods. We conducted experiments involving the inhibition of the BLA during naloxone-induced withdrawal to assess its impact on CPA scores, providing insights into the significance of the BLA in the chronic morphine memory formation process. We also examined changes in C1ql3/C1QL3 expression within the BLA following conditioning. Immunofluorescence analysis revealed the colocalization of C1QL3 and the G protein-coupled receptor, brain-specific angiogenesis inhibitor 3 (BAI3) in the BLA, supporting their involvement in synaptic development. Moreover, we downregulated C1QL3 expression in the BLA to investigate its role in chronic morphine withdrawal memory formation. Our findings revealed that BLA inhibition during naloxone-induced withdrawal led to a significant reduction in CPA scores, confirming the critical role of the BLA in this memory process. Additionally, the upregulation of C1ql3 expression within the BLA postconditioning suggested its participation in withdrawal memory formation. The colocalization of C1QL3 and BAI3 in the BLA further supported their involvement in synaptic development. Furthermore, downregulation of C1QL3 in the BLA effectively hindered chronic morphine withdrawal memory formation, emphasizing its pivotal role in this process. Notably, we identified postsynaptic density protein 95 (PSD95) as a potential downstream effector of C1QL3 during chronic morphine withdrawal memory formation. Blocking PSD95 led to a significant reduction in the CPA score, and it appeared that C1QL3 modulated the ubiquitination-mediated degradation of PSD95, resulting in decreased PSD95 protein levels. This study underscores the importance of the BLA, C1QL3 and PSD95 in chronic morphine withdrawal memory formation. It provides valuable insights into the underlying molecular mechanisms, emphasizing their significance in this intricate process.
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Affiliation(s)
- Yan Pan
- MOE Frontiers Center for Brain Science, School of Basic Medical Sciences, Institutes of Brain Science, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China.
| | - Zhangyin Cai
- MOE Frontiers Center for Brain Science, School of Basic Medical Sciences, Institutes of Brain Science, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China
| | - Yingqi Wang
- MOE Frontiers Center for Brain Science, School of Basic Medical Sciences, Institutes of Brain Science, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China; Perelman School of Medicine, University of Pennsylvania, Philadelphia, United States
| | - Junfang Zhang
- MOE Frontiers Center for Brain Science, School of Basic Medical Sciences, Institutes of Brain Science, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China
| | - Huan Sheng
- MOE Frontiers Center for Brain Science, School of Basic Medical Sciences, Institutes of Brain Science, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China
| | - Da Shao
- MOE Frontiers Center for Brain Science, School of Basic Medical Sciences, Institutes of Brain Science, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China
| | - Dongyang Cui
- MOE Frontiers Center for Brain Science, School of Basic Medical Sciences, Institutes of Brain Science, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China
| | - Xinli Guo
- MOE Frontiers Center for Brain Science, School of Basic Medical Sciences, Institutes of Brain Science, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China
| | - Ping Zheng
- MOE Frontiers Center for Brain Science, School of Basic Medical Sciences, Institutes of Brain Science, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China
| | - Bin Lai
- MOE Frontiers Center for Brain Science, School of Basic Medical Sciences, Institutes of Brain Science, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China.
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2
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Duan Y, Jin L, Du W, Meng Y, Liang J, Zhang J, Sui N, Shen F. Distinctive roles of L-type calcium channels subtypes within the dorsal hippocampus in formation of morphine withdrawal-induced aversion in rats. Prog Neuropsychopharmacol Biol Psychiatry 2023; 127:110818. [PMID: 37348641 DOI: 10.1016/j.pnpbp.2023.110818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 06/10/2023] [Accepted: 06/19/2023] [Indexed: 06/24/2023]
Abstract
Although the negative effects coming along with opiate withdrawal are in part modulated by L-type calcium channels (LTCCs), the distinctive physiological properties and functions of LTCCs subtypes suggest differential roles of subtypes during withdrawal. The present study aimed to examine the contributions of LTCC subtypes, Cav1.2 and Cav1.3, within the dorsal hippocampus (DH) in naloxone-precipitated morphine withdrawal using the conditioned place aversion (CPA) paradigm. Firstly, we injected the non-specific LTCCs antagonist verapamil into the DH of morphine-dependent rats before conditioning an environment with naloxone-precipitated withdrawal. Our results showed that verapamil blocked the acquisition of CPA. Then, to explore the molecular mechanisms of LTCCs subtypes during withdrawal, we measured the protein expression of Cav1.2 and Cav1.3 in morphine-dependent rats under different conditions. In morphine-dependent rats, conditioning with withdrawal increased Cav1.2 expression in the membrane, while only acute naloxone injection increased the membrane expression of Cav1.3. To further determine the causal roles of LTCCs subtypes in the withdrawal process, we used Cav1.2 siRNA or Cav1.3 shRNA to knock down the expression of subtypes and detected the effects on CPA and somatic withdrawal signs in morphine-dependent rats. Cav1.2 siRNA, but not Cav1.3 shRNA, inhibited the acquirement of CPA and relieved somatic withdrawal symptoms. Together, our findings reveal that Cav1.2, but not Cav1.3 plays an important role in mediating morphine withdrawal, suggesting this subtype may serve as a potential therapeutic target for the treatment of negative effects in opiate dependence.
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Affiliation(s)
- Ying Duan
- CAS key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lingtong Jin
- CAS key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenjie Du
- CAS key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yiming Meng
- CAS key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jing Liang
- CAS key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianjun Zhang
- CAS key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Nan Sui
- CAS key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fang Shen
- CAS key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China.
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3
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McGregor MS, LaLumiere RT. Still a "hidden island"? The rodent insular cortex in drug seeking, reward, and risk. Neurosci Biobehav Rev 2023; 153:105334. [PMID: 37524140 PMCID: PMC10592220 DOI: 10.1016/j.neubiorev.2023.105334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/06/2023] [Accepted: 07/28/2023] [Indexed: 08/02/2023]
Abstract
The insular cortex (IC) is implicated in risky decision making and drug-seeking behaviors, in a manner dissociable from natural reward seeking. However, evidence from rodent studies of motivated behaviors suggests that the role of the IC is not always consistent across procedures. Moreover, there is evidence of dissociation of function between posterior (pIC) and anterior (aIC) subregions in these behaviors. Under which circumstances, and by which mechanisms, these IC subregions are recruited to regulate motivated behaviors remains unclear. Here, we discuss evidence of rodent pIC and aIC function across drug-related behaviors, natural reward seeking, and decision making under risk and highlight procedural differences that may account for seemingly conflicting findings. Although gaps in the literature persist, we hypothesize that IC activity is broadly important for selection of appropriate behaviors based on learned action-outcome contingencies and that associated risk is sufficient, but not necessary, to recruit the aIC in reward seeking without involving the pIC.
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Affiliation(s)
- Matthew S McGregor
- Interdisciplinary Graduate Program in Neuroscience, University of Iowa, Iowa City, IA 52242, United States.
| | - Ryan T LaLumiere
- Interdisciplinary Graduate Program in Neuroscience, University of Iowa, Iowa City, IA 52242, United States; Department of Psychological and Brain Sciences, University of Iowa, Iowa City, IA 52242, United States; Iowa Neuroscience Institute, University of Iowa, Iowa City, IA 52242, United States
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4
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Zuzina AB, Vinarskaya AK, Balaban PM. DNA Methylation Inhibition Reversibly Impairs the Long-Term Context Memory Maintenance in Helix. Int J Mol Sci 2023; 24:14068. [PMID: 37762369 PMCID: PMC10531757 DOI: 10.3390/ijms241814068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/08/2023] [Accepted: 09/10/2023] [Indexed: 09/29/2023] Open
Abstract
This work aims to study the epigenetic mechanisms of regulating long-term context memory in the gastropod mollusk: Helix. We have shown that RG108, an inhibitor of DNA methyltransferase (DNMT), impaired long-term context memory in snails, and this impairment can be reversed within a limited time window: no more than 48 h. Research on the mechanisms through which the long-term context memory impaired by DNMT inhibition could be reinstated demonstrated that this effect depends on several biochemical mechanisms: nitric oxide synthesis, protein synthesis, and activity of the serotonergic system. Memory recovery did not occur if at least one of these mechanisms was impaired. The need for the joint synergic activity of several biochemical systems for a successful memory rescue confirms the assumption that the memory recovery process depends on the process of active reconsolidation, and is not simply a passive weakening of the effect of RG108 over time. Finally, we showed that the reactivation of the impaired memory by RG108, followed by administration of histone deacetylase inhibitor sodium butyrate, led to memory recovery only within a narrow time window: no more than 48 h after memory disruption.
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Affiliation(s)
| | | | - Pavel M. Balaban
- Cellular Neurobiology of Learning Lab, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerova St., Moscow 117485, Russia; (A.B.Z.); (A.K.V.)
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Liu P, Liang J, Jiang F, Cai W, Shen F, Liang J, Zhang J, Sun Z, Sui N. Gnas Promoter Hypermethylation in the Basolateral Amygdala Regulates Reconsolidation of Morphine Reward Memory in Rats. Genes (Basel) 2022; 13:genes13030553. [PMID: 35328106 PMCID: PMC8950747 DOI: 10.3390/genes13030553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 03/17/2022] [Accepted: 03/18/2022] [Indexed: 12/12/2022] Open
Abstract
Impairing reconsolidation may disrupt drug memories to prevent relapse, meanwhile long-term transcription regulations in the brain regions contribute to the occurrence of emotional memories. The basolateral amygdala (BLA) is involved in the drug-cue association, while the nucleus accumbens (NAc) responds to the drug reward. Here, we assessed whether DNA methyltransferases (Dnmts) in these two brain regions function identically in the reconsolidation of morphine reward memory. We show that Dnmts inhibition in the BLA but not in the NAc after memory retrieval impaired reconsolidation of a morphine reward memory. Moreover, the mRNA levels of Dnmt3a and Dnmt3b, rather than Dnmt1, in the BLA were continuously upregulated after retrieval. We further identified the differentially methylated regions (DMRs) in genes in the BLA after retrieval, and focused on the DMRs located in gene promoter regions. Among them were three genes (Gnas, Sox10, and Pik3r1) involved in memory modulation. Furthermore, Gnas promoter hypermethylation was confirmed to be inversely correlated with the downregulation of Gnas mRNA levels. The findings indicate that the specific transcription regulation mechanism in the BLA and NAc on reconsolidation of opiate-associated memories can be dissociable, and DNA hypermethylation of Gnas in the BLA is necessary for the reconsolidation of morphine reward memories.
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Affiliation(s)
- Peng Liu
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China; (P.L.); (F.J.); (F.S.); (J.L.); (N.S.)
- Department of Psychology, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Jialong Liang
- Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China; (J.L.); (W.C.)
| | - Fengze Jiang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China; (P.L.); (F.J.); (F.S.); (J.L.); (N.S.)
- Department of Psychology, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Wanshi Cai
- Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China; (J.L.); (W.C.)
| | - Fang Shen
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China; (P.L.); (F.J.); (F.S.); (J.L.); (N.S.)
- Department of Psychology, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Jing Liang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China; (P.L.); (F.J.); (F.S.); (J.L.); (N.S.)
- Department of Psychology, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Jianjun Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China; (P.L.); (F.J.); (F.S.); (J.L.); (N.S.)
- Department of Psychology, University of Chinese Academy of Sciences, Beijing 100101, China
- Correspondence: (J.Z.); (Z.S.)
| | - Zhongsheng Sun
- Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China; (J.L.); (W.C.)
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou 325000, China
- Correspondence: (J.Z.); (Z.S.)
| | - Nan Sui
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China; (P.L.); (F.J.); (F.S.); (J.L.); (N.S.)
- Department of Psychology, University of Chinese Academy of Sciences, Beijing 100101, China
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6
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Hong Q, Xu W, Lin Z, Liu J, Chen W, Zhu H, Lai M, Zhuang D, Xu Z, Fu D, Zhou W, Liu H. Role of GABRD Gene Methylation in the Nucleus Accumbens in Heroin-Seeking Behavior in Rats. Front Pharmacol 2021; 11:612200. [PMID: 33551813 PMCID: PMC7859445 DOI: 10.3389/fphar.2020.612200] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/27/2020] [Indexed: 11/13/2022] Open
Abstract
Epigenetic modifications such as DNA methylation play important roles in regulating gene expression and may mediate neuroplasticity and lead to drug-induced aberrant behaviors. Although several brain regions and neurobiological mechanisms have been suggested to be involved in these processes, there is remarkably little known about the effects of DNA methylation on heroin-seeking behavior. Using a Sprague-Dawley rat model, we show that heroin self-administration resulted in gamma-aminobutyric acid type A receptor subunit delta (GABRD) gene hypomethylation, which was associated with transcriptional upregulation of GABRD in the nucleus accumbens (NAc). Systemic l-methionine (MET) administration significantly strengthened the reinstatement of heroin-seeking behavior induced by heroin priming, whereas intra-NAc injections of the DNA methyltransferase (DNMT) inhibitor 5-aza-2'-deoxycytidine (5-Aza-dC) had the opposite effect on heroin-seeking. Meanwhile, 5-Aza-dC treatment decreased DNA methylation and upregulated the expression of GABRD in the NAc, whereas MET had the opposite effect. Our results also reveal that 5-Aza-dC might alter the methylation landscape of the GABRD gene by directly repressing DNMT1 and DNMT3A expression. Furthermore, reinstatement of heroin-seeking behavior was significantly inhibited by directly overexpressing GABRD and remarkably reinforced by GABRD gene silencing in the NAc. Collectively, these results suggest that targeting the GABRD gene and its methylation might represent a novel pharmacological strategy for treating heroin addiction and relapse.
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Affiliation(s)
- Qingxiao Hong
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
- Key Laboratory of Addiction Research of Zhejiang Province, Ningbo, China
| | - Wenjin Xu
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
- Key Laboratory of Addiction Research of Zhejiang Province, Ningbo, China
| | - Zi Lin
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
| | - Jing Liu
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
| | - Weisheng Chen
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
- Key Laboratory of Addiction Research of Zhejiang Province, Ningbo, China
| | - Huaqiang Zhu
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
- Key Laboratory of Addiction Research of Zhejiang Province, Ningbo, China
| | - Miaojun Lai
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
- Key Laboratory of Addiction Research of Zhejiang Province, Ningbo, China
| | - Dingding Zhuang
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
- Key Laboratory of Addiction Research of Zhejiang Province, Ningbo, China
| | - Zemin Xu
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
- Key Laboratory of Addiction Research of Zhejiang Province, Ningbo, China
| | - Dan Fu
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
- Key Laboratory of Addiction Research of Zhejiang Province, Ningbo, China
| | - Wenhua Zhou
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
- Key Laboratory of Addiction Research of Zhejiang Province, Ningbo, China
| | - Huifen Liu
- Laboratory of Behavioral Neuroscience, Ningbo Kangning Hospital, Ningbo Institute of Microcirculation and Henbane, School of Medicine, Ningbo University, Ningbo, China
- Key Laboratory of Addiction Research of Zhejiang Province, Ningbo, China
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7
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Jiang F, Zheng W, Wu C, Li Y, Shen F, Liang J, Li M, Zhang J, Sui N. Double dissociation of inhibitory effects between the hippocampal TET1 and TET3 in the acquisition of morphine self-administration in rats. Addict Biol 2021; 26:e12875. [PMID: 32031744 DOI: 10.1111/adb.12875] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 12/02/2019] [Accepted: 01/09/2020] [Indexed: 12/15/2022]
Abstract
The development of opioid addiction involves DNA methylation. Accordingly, the DNA demethylation, induced by ten-eleven translocation (Tet) enzymes, may represent a novel approach to prevent opioid addiction. The present study examined the role of TET1 and TET3 in the development of morphine-seeking behavior in rats. We showed that 1 day of morphine self-administration (SA) training upregulated TET3 but not TET1 expression in the hippocampal CA1. With 7 days of morphine SA training, the expression of TET3 in the CA1 returned to the baseline level, while the TET1 expression was downregulated. No change of TET1 and TET3 in the nucleus accumbens shell was observed in morphine SA trained rats, or in the yoked morphine rats, or in rats trained for saccharin SA. Furthermore, we found that knocking down TET3 expression in the CA1 accelerated the acquisition of morphine SA, while overexpression of the catalytic domain of TET1 in the CA1 attenuated the acquisition. Together, these findings suggest that TET1 and TET3 in the CA1 are important epigenetic modulators involved in the morphine-seeking behavior and provide a new strategy in the treatment of opioid addiction.
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Affiliation(s)
- Feng‐Ze Jiang
- CAS Key Laboratory of Mental Health, Institute of Psychology Beijing China
- Department of Psychology University of Chinese Academy of Sciences Beijing China
| | - Wei Zheng
- CAS Key Laboratory of Mental Health, Institute of Psychology Beijing China
- Department of Psychology University of Chinese Academy of Sciences Beijing China
| | - Chao Wu
- CAS Key Laboratory of Mental Health, Institute of Psychology Beijing China
- Department of Psychology University of Chinese Academy of Sciences Beijing China
| | - Yonghui Li
- CAS Key Laboratory of Mental Health, Institute of Psychology Beijing China
- Department of Psychology University of Chinese Academy of Sciences Beijing China
| | - Fang Shen
- CAS Key Laboratory of Mental Health, Institute of Psychology Beijing China
- Department of Psychology University of Chinese Academy of Sciences Beijing China
| | - Jing Liang
- CAS Key Laboratory of Mental Health, Institute of Psychology Beijing China
- Department of Psychology University of Chinese Academy of Sciences Beijing China
| | - Ming Li
- Department of Psychology University of Nebraska—Lincoln Lincoln Nebraska USA
| | - Jian‐Jun Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology Beijing China
- Department of Psychology University of Chinese Academy of Sciences Beijing China
| | - Nan Sui
- CAS Key Laboratory of Mental Health, Institute of Psychology Beijing China
- Department of Psychology University of Chinese Academy of Sciences Beijing China
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8
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Sun K, Xiao L, Wu Y, Zuo D, Zhang C, Liu S, He Z, Rong S, Wang F, Sun T. GABAergic neurons in the insular cortex play an important role in cue-morphine reward memory reconsolidation. Life Sci 2020; 254:117655. [DOI: 10.1016/j.lfs.2020.117655] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 03/29/2020] [Accepted: 04/06/2020] [Indexed: 01/26/2023]
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9
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Sun K, Mu Q, Chang H, Zhang C, Wang Y, Rong S, Liu S, Zuo D, He Z, Wan D, Yang H, Wang F, Sun T. Postretrieval Microinjection of Baclofen Into the Agranular Insular Cortex Inhibits Morphine-Induced CPP by Disrupting Reconsolidation. Front Pharmacol 2020; 11:743. [PMID: 32508658 PMCID: PMC7248341 DOI: 10.3389/fphar.2020.00743] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 05/04/2020] [Indexed: 12/15/2022] Open
Abstract
Environmental cues associated with drug abuse are powerful mediators of drug craving and relapse in substance-abuse disorders. Consequently, attenuating the strength of cue-drug memories could reduce the number of factors that cause drug craving and relapse. Interestingly, impairing cue-drug memory reconsolidation is a generally accepted strategy aimed at reducing the intensity of cues that trigger drug-seeking and drug-taking behaviors. In addition, the agranular insular cortex (AI) is an important component of the neural circuits underlying drug-related memory reconsolidation. GABAB receptors (GABABRs) are potential targets for the treatment of addiction, and baclofen (BLF) is the only prototypical GABAB agonist available for application in clinical addiction treatment. Furthermore, ΔFosB is considered a biomarker for the evaluation of potential therapeutic interventions for addiction. Here, we used the morphine-induced conditioned place preference (CPP) paradigm to investigate whether postretrieval microinjections of BLF into the AI could affect reconsolidation of drug-reward memory, reinstatement of CPP, and the level of ΔFosB in mice. Our results showed that BLF infused into the AI immediately following morphine CPP memory retrieval, but not 6 h postretrieval or following nonretrieval, could eliminate the expression of a morphine CPP memory. This effect persisted in a morphine-priming–induced reinstatement test, suggesting that BLF in the AI was capable of preventing the reconsolidation of the morphine CPP memory. Our results also showed that the elimination of morphine CPP memory was associated with reduced morphine-associated ΔFosB expression in the longer term. Taken together, the results of our research provide evidence to support that GABABRs in the AI have an important role in drug-cue memory reconsolidation and further our understanding of the role of the AI in drug-related learning and memory.
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Affiliation(s)
- Kuisheng Sun
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, The People's Hospital of Gaozhou, Gaozhou, China
| | - Qingchun Mu
- Department of Neurosurgery, The People's Hospital of Gaozhou, Gaozhou, China
| | - Haigang Chang
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Chun Zhang
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Yehua Wang
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Shikuo Rong
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Shenhai Liu
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Di Zuo
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Zhenquan He
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Ding Wan
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Hua Yang
- Department of Critical Care Medicine, The People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, China
| | - Feng Wang
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Tao Sun
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, China
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10
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Malboosi N, Nasehi M, Hashemi M, Vaseghi S, Zarrindast MR. The neuroprotective effect of NeuroAid on morphine-induced amnesia with respect to the expression of TFAM, PGC-1α, ΔfosB and CART genes in the hippocampus of male Wistar rats. Gene 2020; 742:144601. [PMID: 32198124 DOI: 10.1016/j.gene.2020.144601] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 02/16/2020] [Accepted: 03/16/2020] [Indexed: 02/07/2023]
Abstract
Morphine is a natural alkaloid which derived from the opium poppy Papaver somniferum. Many studies have reported the effect of morphine on learning, memory and gene expression. CART (cocaine-amphetamine regulated transcript)is an important neuropeptide which has a critical role in physiological processes including drug dependence and antioxidant activity. ΔfosB is a transcription factor which modulates synaptic plasticity and affects learning and memory. TFAM (the mitochondrial transcription factor A) and PGC-1α (Peroxisome proliferator-activated receptor γ coactivator-1α) are critically involved in mitochondrial biogenesis and antioxidant pathways. NeuroAid is a Chinese medicine that induces neuroprotective and anti-apoptotic effects. In this research, we aimed to investigate the effect of NeuroAid on morphine-induced amnesia with respect to the expression of TFAM, PGC-1α, ΔfosB and CART in the rat's hippocampus. In this study, Morphine sulfate (at increasing doses), Naloxone hydrochloride (2.5 mg/kg) and NeuroAid (2.5 mg/kg) were administered intraperitoneal and real-time PCR reactions were done to assess gene expression. The results showed, morphine impaired memory of step-through passive avoidance, while NeuroAid had no effect. NeuroAid attenuated (but not reversed) morphine-induced memory impairment in morphine-addicted rats. Morphine increased the expression of PGC-1α and decreased the expression of CART. However, NeuroAid increased the expression of TFAM, PGC-1α, ΔfosB and CART. NeuroAid restored the effect of morphine on the expression of CART and PGC-1α. In conclusion, morphine impaired memory of step-through passive avoidance and NeuroAid attenuated this effect. The effect of NeuroAid on morphine-induced memory impairment/gene expression may be related to its anti-apoptotic and neuroprotective effects.
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Affiliation(s)
- Nasrin Malboosi
- Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mohammad Nasehi
- Cognitive and Neuroscience Research Center (CNRC), Amir-Almomenin Hospital, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Mehrdad Hashemi
- Department of Genetics, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Salar Vaseghi
- Cognitive and Neuroscience Research Center (CNRC), Amir-Almomenin Hospital, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Institute for Cognitive Science Studies (ICSS), Tehran, Iran
| | - Mohammad-Reza Zarrindast
- Institute for Cognitive Science Studies (ICSS), Tehran, Iran; Department of Pharmacology School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Department of Neuroendocrinology, Endocrinology and Metabolism Research Institute, Tehran University of Medical Sciences, Tehran, Iran
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11
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Zhang J, Jiang F, Zheng W, Duan Y, Jin S, Shen F, Liang J, Li M, Sui N. DNMT3a in the hippocampal CA1 is crucial in the acquisition of morphine self-administration in rats. Addict Biol 2020; 25:e12730. [PMID: 30950138 DOI: 10.1111/adb.12730] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 01/11/2019] [Accepted: 01/24/2019] [Indexed: 12/17/2022]
Abstract
Drug-reinforced excessive operant responding is one fundamental feature of long-lasting addiction-like behaviors and relapse in animals. However, the transcriptional regulatory mechanisms responsible for the persistent drug-specific (not natural rewards) operant behavior are not entirely clear. In this study, we demonstrate a key role for one of the de novo DNA methyltransferase, DNMT3a, in the acquisition of morphine self-administration (SA) in rats. The expression of DNMT3a in the hippocampal CA1 region but not in the nucleus accumbens shell was significantly up-regulated after 1- and 7-day morphine SA (0.3 mg/kg/infusion) but not after the yoked morphine injection. On the other hand, saccharin SA did not affect the expression of DNMT3a or DNMT3b. DNMT inhibitor 5-aza-2-deoxycytidine (5-aza) microinjected into the hippocampal CA1 significantly attenuated the acquisition of morphine SA. Knockdown of DNMT3a also impaired the ability to acquire the morphine SA. Overall, these findings suggest that DNMT3a in the hippocampus plays an important role in the acquisition of morphine SA and may be a valid target to prevent the development of morphine addiction.
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Affiliation(s)
- Jian‐Jun Zhang
- CAS Key Laboratory of Mental HealthInstitute of Psychology Beijing China
- Department of PsychologyUniversity of Chinese Academy of Sciences Beijing China
| | - Feng‐Ze Jiang
- CAS Key Laboratory of Mental HealthInstitute of Psychology Beijing China
- Department of PsychologyUniversity of Chinese Academy of Sciences Beijing China
| | - Wei Zheng
- CAS Key Laboratory of Mental HealthInstitute of Psychology Beijing China
- Department of PsychologyUniversity of Chinese Academy of Sciences Beijing China
| | - Ying Duan
- CAS Key Laboratory of Mental HealthInstitute of Psychology Beijing China
- Department of PsychologyUniversity of Chinese Academy of Sciences Beijing China
| | - Shu‐Bo Jin
- CAS Key Laboratory of Mental HealthInstitute of Psychology Beijing China
- Department of PsychologyUniversity of Chinese Academy of Sciences Beijing China
| | - Fang Shen
- CAS Key Laboratory of Mental HealthInstitute of Psychology Beijing China
- Department of PsychologyUniversity of Chinese Academy of Sciences Beijing China
| | - Jing Liang
- CAS Key Laboratory of Mental HealthInstitute of Psychology Beijing China
- Department of PsychologyUniversity of Chinese Academy of Sciences Beijing China
| | - Ming Li
- Department of PsychologyUniversity of Nebraska–Lincoln Lincoln Nebraska USA
| | - Nan Sui
- CAS Key Laboratory of Mental HealthInstitute of Psychology Beijing China
- Department of PsychologyUniversity of Chinese Academy of Sciences Beijing China
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12
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Abstract
This paper is the fortieth consecutive installment of the annual anthological review of research concerning the endogenous opioid system, summarizing articles published during 2017 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 (1), the roles of these opioid peptides and receptors in pain and analgesia in animals (2) and humans (3), opioid-sensitive and opioid-insensitive effects of nonopioid analgesics (4), opioid peptide and receptor involvement in tolerance and dependence (5), stress and social status (6), learning and memory (7), eating and drinking (8), drug abuse and alcohol (9), sexual activity and hormones, pregnancy, development and endocrinology (10), mental illness and mood (11), seizures and neurologic disorders (12), electrical-related activity and neurophysiology (13), general activity and locomotion (14), gastrointestinal, renal and hepatic functions (15), cardiovascular responses (16), respiration and thermoregulation (17), and immunological responses (18).
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, CUNY, 65-30 Kissena Blvd., Flushing, NY, 11367, United States.
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13
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Listos J, Łupina M, Talarek S, Mazur A, Orzelska-Górka J, Kotlińska J. The Mechanisms Involved in Morphine Addiction: An Overview. Int J Mol Sci 2019; 20:ijms20174302. [PMID: 31484312 PMCID: PMC6747116 DOI: 10.3390/ijms20174302] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/23/2019] [Accepted: 08/29/2019] [Indexed: 12/22/2022] Open
Abstract
Opioid use disorder is classified as a chronic recurrent disease of the central nervous system (CNS) which leads to personality disorders, co-morbidities and premature death. It develops as a result of long-term administration of various abused substances, along with morphine. The pharmacological action of morphine is associated with its stimulation of opioid receptors. Opioid receptors are a group of G protein-coupled receptors and activation of these receptors by ligands induces significant molecular changes inside the cell, such as an inhibition of adenylate cyclase activity, activation of potassium channels and reductions of calcium conductance. Recent data indicate that other signalling pathways also may be involved in morphine activity. Among these are phospholipase C, mitogen-activated kinases (MAP kinases) or β-arrestin. The present review focuses on major mechanisms which currently are considered as essential in morphine activity and dependence and may be important for further studies.
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Affiliation(s)
- Joanna Listos
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, Chodzki 4a St., 20-093 Lublin, Poland.
| | - Małgorzata Łupina
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, Chodzki 4a St., 20-093 Lublin, Poland.
| | - Sylwia Talarek
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, Chodzki 4a St., 20-093 Lublin, Poland.
| | - Antonina Mazur
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, Chodzki 4a St., 20-093 Lublin, Poland.
| | - Jolanta Orzelska-Górka
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, Chodzki 4a St., 20-093 Lublin, Poland.
| | - Jolanta Kotlińska
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, Chodzki 4a St., 20-093 Lublin, Poland.
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14
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Marie-Claire C, Jourdaine C, Lépine JP, Bellivier F, Bloch V, Vorspan F. Pharmacoepigenomics of opiates and methadone maintenance treatment: current data and perspectives. Pharmacogenomics 2017; 18:1359-1372. [DOI: 10.2217/pgs-2017-0040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Current treatments of opioid addiction include primarily maintenance medications such as methadone. Chronic exposure to opiate and/or long-lasting maintenance treatment induce modulations of gene expression in brain and peripheral tissues. There is increasing evidence that epigenetic modifications underlie these modulations. This review summarizes published results on opioid-induced epigenetic changes in animal models and in patients. The epigenetic modifications observed with other drugs of abuse often used by opiate abusers are also outlined. Specific methadone maintenance treatment induced epigenetic modifications at different treatment stages may be combined with the ones resulting from patients’ substance use history. Therefore, research comparing groups of addicts with similar history and substances use disorders but contrasting for well-characterized treatment phenotypes should be encouraged.
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Affiliation(s)
- Cynthia Marie-Claire
- Variabilité de réponse aux psychotropes, INSERMU1144/Faculté de Pharmacie de Paris/Université Paris Descartes/Université ParisDiderot/Université Sorbonne Paris Cité, Paris, France
| | - Clément Jourdaine
- AP-HP, GH Saint-Louis – Lariboisière – F. Widal, Pôle de Psychiatrie et de Médecine Addictologique, 75475 Paris cedex 10, France
| | - Jean-Pierre Lépine
- AP-HP, GH Saint-Louis – Lariboisière – F. Widal, Pôle de Psychiatrie et de Médecine Addictologique, 75475 Paris cedex 10, France
| | - Frank Bellivier
- Variabilité de réponse aux psychotropes, INSERMU1144/Faculté de Pharmacie de Paris/Université Paris Descartes/Université ParisDiderot/Université Sorbonne Paris Cité, Paris, France
- AP-HP, GH Saint-Louis – Lariboisière – F. Widal, Pôle de Psychiatrie et de Médecine Addictologique, 75475 Paris cedex 10, France
| | - Vanessa Bloch
- Variabilité de réponse aux psychotropes, INSERMU1144/Faculté de Pharmacie de Paris/Université Paris Descartes/Université ParisDiderot/Université Sorbonne Paris Cité, Paris, France
| | - Florence Vorspan
- Variabilité de réponse aux psychotropes, INSERMU1144/Faculté de Pharmacie de Paris/Université Paris Descartes/Université ParisDiderot/Université Sorbonne Paris Cité, Paris, France
- AP-HP, GH Saint-Louis – Lariboisière – F. Widal, Pôle de Psychiatrie et de Médecine Addictologique, 75475 Paris cedex 10, France
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15
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Arguello AA, Wang R, Lyons CM, Higginbotham JA, Hodges MA, Fuchs RA. Role of the agranular insular cortex in contextual control over cocaine-seeking behavior in rats. Psychopharmacology (Berl) 2017; 234:2431-2441. [PMID: 28462472 PMCID: PMC5538945 DOI: 10.1007/s00213-017-4632-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 04/15/2017] [Indexed: 11/30/2022]
Abstract
RATIONALE Environmental stimulus control over drug relapse requires the retrieval of context-response-cocaine associations, maintained in long-term memory through active reconsolidation processes. Identifying the neural substrates of these phenomena is important from a drug addiction treatment perspective. OBJECTIVES The present study evaluated whether the agranular insular cortex (AI) plays a role in drug context-induced cocaine-seeking behavior and cocaine memory reconsolidation. METHODS Rats were trained to lever press for cocaine infusions in a distinctive context, followed by extinction training in a different context. Rats in experiment 1 received bilateral microinfusions of vehicle or a GABA agonist cocktail (baclofen and muscimol (BM)) into the AI or the overlying somatosensory cortex (SSJ, anatomical control region) immediately before a test of drug-seeking behavior (i.e., non-reinforced lever presses) in the previously cocaine-paired context. The effects of these manipulations on locomotor activity were also assessed in a novel context. Rats in experiment 2 received vehicle or BM into the AI after a 15-min reexposure to the cocaine-paired context, intended to reactivate context-response-cocaine memories and initiate their reconsolidation. The effects of these manipulations on drug context-induced cocaine-seeking behavior were assessed 72 h later. RESULTS BM-induced pharmacological inactivation of the AI, but not the SSJ, attenuated drug context-induced reinstatement of cocaine-seeking behavior without altering locomotor activity. Conversely, AI inactivation after memory reactivation failed to impair subsequent drug-seeking behavior and thus cocaine memory reconsolidation. CONCLUSIONS These findings suggest that the AI is a critical element of the neural circuitry that mediates contextual control over cocaine-seeking behavior.
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Affiliation(s)
- Amy A. Arguello
- Department of Psychology, Michigan State University, East Lansing, MI, 48824, USA
| | - Rong Wang
- Integrative Physiology and Neuroscience, Washington State University, VBRB #231 Pullman, WA, 99164-7620, USA
| | - Carey M. Lyons
- Integrative Physiology and Neuroscience, Washington State University, VBRB #231 Pullman, WA, 99164-7620, USA
| | - Jessica A. Higginbotham
- Integrative Physiology and Neuroscience, Washington State University, VBRB #231 Pullman, WA, 99164-7620, USA
| | - Matthew A. Hodges
- Integrative Physiology and Neuroscience, Washington State University, VBRB #231 Pullman, WA, 99164-7620, USA
| | - Rita A. Fuchs
- Integrative Physiology and Neuroscience, Washington State University, VBRB #231 Pullman, WA, 99164-7620, USA,Corresponding Author: Dr. Rita A. Fuchs, Washington State University, College of Veterinary Medicine, Integrative Physiology and Neuroscience, P.O. Box 647620, Pullman, WA 99164-7620, USA, Phone: 509-335-6164, Fax: 509-335-4650,
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16
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Qiao X, Yin F, Ji Y, Li Y, Yan P, Lai J. 5-Aza-2'-deoxycytidine in the medial prefrontal cortex regulates alcohol-related behavior and Ntf3-TrkC expression in rats. PLoS One 2017; 12:e0179469. [PMID: 28614398 PMCID: PMC5470731 DOI: 10.1371/journal.pone.0179469] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 05/31/2017] [Indexed: 12/16/2022] Open
Abstract
Recent studies have indicated that DNA methylation plays an important role in the development of alcohol abuse. 5-Aza-2'-deoxycytidine (5-Aza-dc), an inhibitor of DNA methyltransferases, was FDA approved for myelodysplastic syndrome treatment. However, it is unclear whether 5-Aza-dc is involved in alcohol abuse. In this study, using a chronic alcohol exposure model in rats, 5-Aza-dc was injected into the medial prefrontal cortex (mPFC). Alcohol-drinking behavior and the anxiety related behavior were evaluated by two-bottle choice and open field test. We found that 5-Aza-dc injection into the mPFC significantly decreased alcohol consumption and alcohol preference in alcohol-exposure rats, corresponding to the reduced blood alcohol levels. Although 5-Aza-dc potentiated the anxiety-like behavior of alcohol-exposure rats, it had no effect on the locomotor activity. Moreover, both of the mRNA and protein levels of DNA Methyltransferase 3A (DNMT3A) and DNMT3B in the mPFC were upregulated after 35 days of alcohol exposure and this upregulation could be reversed by 5-Aza-dc treatment. Additionally, 5-Aza-dc reversed the alcohol-induced downregulation of neurotrophin-3 (Ntf3), correspondingly the expression of its receptor-TrkC was reduced. These findings identified a functional role of 5-Aza-dc in alcohol-related behavioral phenotypes and one of the potential target genes, Ntf3. We also provide novel evidence for DNA methyltransferases as potential therapeutic targets in alcohol abuse.
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Affiliation(s)
- Xiaomeng Qiao
- College of Forensic Science, School of Medicine, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Fangyuan Yin
- College of Forensic Science, School of Medicine, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Yuanyuan Ji
- College of Forensic Science, School of Medicine, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Yunxiao Li
- College of Forensic Science, School of Medicine, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Peng Yan
- College of Forensic Science, School of Medicine, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Jianghua Lai
- College of Forensic Science, School of Medicine, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi’an, Shaanxi, China
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17
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Rothwell CM, Lukowiak KD. Impairing DNA methylation obstructs memory enhancement for at least 24 hours in Lymnaea. Commun Integr Biol 2017; 10:e1306616. [PMID: 28702126 PMCID: PMC5501202 DOI: 10.1080/19420889.2017.1306616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 03/08/2017] [Accepted: 03/09/2017] [Indexed: 11/30/2022] Open
Abstract
Stressor-induced memory enhancement has previously been shown to involve DNA methylation in the mollusc Lymnaea stagnalis. Specifically, injection of the DNA methylation inhibitor 5-AZA one hour before exposure to a memory-enhancing stressor obstructs memory augmentation. However, the duration of the influence of 5-AZA on this memory enhancement has not yet been examined. In this study, 2 memory-enhancing stressors (a thermal stress and exposure to the scent of a predator) were used to examine whether injection of the DNA methylation inhibitor 5-AZA 24 hours before stress exposure would still impair memory enhancement. Indeed, it was observed that memory is still obstructed when 5-AZA is injected 24 hours before exposure to either of these stressors in Lymnaea. Understanding that 5-AZA still effectively impairs memory enhancement after a period of 24 hours is valuable because it indicates that experimental manipulations do not need to be made within one hour after the injection of this DNA methylation inhibitor and can instead be made within one day (i.e. 24 hours). These results will allow for a future examination of the possible involvement of DNA methylation in memory enhancement related to longer-term stressors or environmental changes. This study further elucidates the involvement of epigenetic changes in memory enhancement in Lymnaea, providing insight into the process of memory formation in this mollusc.
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Affiliation(s)
- Cailin M Rothwell
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Ken D Lukowiak
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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18
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Webb WM, Sanchez RG, Perez G, Butler AA, Hauser RM, Rich MC, O'Bierne AL, Jarome TJ, Lubin FD. Dynamic association of epigenetic H3K4me3 and DNA 5hmC marks in the dorsal hippocampus and anterior cingulate cortex following reactivation of a fear memory. Neurobiol Learn Mem 2017; 142:66-78. [PMID: 28232238 DOI: 10.1016/j.nlm.2017.02.010] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 01/28/2017] [Accepted: 02/15/2017] [Indexed: 12/20/2022]
Abstract
Epigenetic mechanisms such as DNA methylation and histone methylation are critical regulators of gene transcription changes during memory consolidation. However, it is unknown how these epigenetic modifications coordinate control of gene expression following reactivation of a previously consolidated memory. Here, we found that retrieval of a recent contextual fear conditioned memory increased global levels of H3 lysine 4-trimethylation (H3K4me3) and DNA 5-hydroxymethylation (5hmC) in area CA1 of the dorsal hippocampus. Further experiments revealed increased levels of H3K4me3 and DNA 5hmC within a CpG-enriched coding region of the Npas4, but not c-fos, gene. Intriguingly, retrieval of a 30-day old memory increased H3K4me3 and DNA 5hmC levels at a CpG-enriched coding region of c-fos, but not Npas4, in the anterior cingulate cortex, suggesting that while these two epigenetic mechanisms co-occur following the retrieval of a recent or remote memory, their gene targets differ depending on the brain region. Additionally, we found that in vivo siRNA-mediated knockdown of the H3K4me3 methyltransferase Mll1 in CA1 abolished retrieval-induced increases in DNA 5hmC levels at the Npas4 gene, suggesting that H3K4me3 couples to DNA 5hmC mechanisms. Consistent with this, loss of Mll1 prevented retrieval-induced increases in Npas4 mRNA levels in CA1 and impaired fear memory. Collectively, these findings suggest an important link between histone methylation and DNA hydroxymethylation mechanisms in the epigenetic control of de novo gene transcription triggered by memory retrieval.
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Affiliation(s)
- William M Webb
- Department of Neurobiology, The University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Richard G Sanchez
- Department of Neurobiology, The University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Gabriella Perez
- Department of Neurobiology, The University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Anderson A Butler
- Department of Neurobiology, The University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Rebecca M Hauser
- Department of Neurobiology, The University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Megan C Rich
- Department of Neurobiology, The University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Aidan L O'Bierne
- Department of Neurobiology, The University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Timothy J Jarome
- Department of Neurobiology, The University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - Farah D Lubin
- Department of Neurobiology, The University of Alabama at Birmingham, Birmingham, AL 35294, United States.
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