1
|
Dai J, Xie R, Sun ZN, Kou XL, Zhang JQ, Qi C, Liu R, Gao X, Wang J, Gao J. Protein phosphatase 2A deficiency in hippocampal CA1 inhibits priming effect of morphine on conditioned place preference in mice. Cereb Cortex 2023:6982733. [PMID: 36627245 DOI: 10.1093/cercor/bhac527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 01/12/2023] Open
Abstract
Studies have shown that protein phosphorylation plays an important role in morphine abuse. However, the neurobiological mechanism of protein phosphatase 2A (PP2A) underlying the morphine-priming process is still unclear. Here we constructed T29-2-Cre; PP2Afl/fl conditional knockout mice (KO) and investigated the role of hippocampal PP2A in morphine priming. We observed that the deficit of PP2A inhibited the priming behavior of morphine and blocked the priming-induced long-term potentiation (LTP) in the hippocampus of KO mice. Moreover, the expression levels of Rack1 and the membrane GluN2B were significantly reduced in the nucleus accumbens of KO mice compared with those in the control mice, which may be attributed to the decreased HDAC4 in the hippocampus of KO mice. Consistent with it, the similar inhibited priming effects were also observed in the wild-type mice treated with sodium butyrate (NaB)-a nonspecific inhibitor of histone deacetylases-3 h after morphine administration. Taken together, our results suggest that hippocampal PP2A may be involved in morphine priming through the PP2A/HDAC4/Rack1 pathway.
Collapse
Affiliation(s)
- Jing Dai
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Ran Xie
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Zhou-Na Sun
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Xiao-Lin Kou
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Jia-Qi Zhang
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Cui Qi
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Rui Liu
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Xiang Gao
- SKL of Pharmaceutical Biotechnology and Model Animal Research Center, Collaborative Innovation Center for Genetics and Development, Nanjing Biomedical Research Institute, Nanjing University, Xianlin Avenue 163, Qixia District, Nanjing 210061, China
| | - Jing Wang
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China
| | - Jun Gao
- Department of Neurobiology, School of Basic Medical Science, Nanjing Medical University, Longmian Road 101, Jiangning District, Nanjing 211166, China.,Department of Rehabilitation Medicine, The Affiliated Jiangsu Shengze Hospital to Nanjing Medical University, Shichang West Road 1399, Wujiang District, Suzhou 215228, China
| |
Collapse
|
2
|
Mukhara D, Banks ML, Neigh GN. Stress as a Risk Factor for Substance Use Disorders: A Mini-Review of Molecular Mediators. Front Behav Neurosci 2018; 12:309. [PMID: 30622460 PMCID: PMC6308626 DOI: 10.3389/fnbeh.2018.00309] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 11/28/2018] [Indexed: 12/15/2022] Open
Abstract
The extant literature supports the role of stress in enhancing the susceptibility of drug abuse progressing to a substance use disorder diagnosis. However, the molecular mediators by which stress enhances the progression from cocaine abuse to cocaine use disorder via the mesolimbic pathway remain elusive. In this mini-review article, we highlight three mechanisms by which glucocorticoids (GCs) and the dopaminergic system interact. First, GCs upregulate tyrosine hydroxylase (TH), the rate-limiting enzyme in dopamine (DA) synthesis. Second, GCs downregulate monoamine-oxidase (MAO), an enzyme responsible for DA removal. Lastly, GCs are hypothesized to decrease DA reuptake, subsequently increasing synaptic DA. Based on these interactions, we review preclinical literature highlighting how stress modulates the mesolimbic pathway, including the ventral tegmental area (VTA) and nucleus accumbens (NAcs), to alter cocaine abuse-related effects. Taken together, stress enhances cocaine's abuse-related effects at multiple points along the VTA mesolimbic projection, and uniquely in the NAcs through a positive feedback type mechanism. Furthermore, we highlight future directions to elucidate the interaction between the prefrontal cortex (PFC) and key intermediaries including ΔFosB, cAMP response element binding protein (CREB) and cyclin-dependent kinase 5 (CDK5) to highlight possible mechanisms that underlie stress-induced acceleration of the progression to a cocaine use disorder diagnosis.
Collapse
Affiliation(s)
- Deepika Mukhara
- Department of Anatomy & Neurobiology, Virginia Commonwealth University, Richmond, VA, United States
| | - Matthew L. Banks
- Department of Pharmacology & Toxicology, Virginia Commonwealth University, Richmond, VA, United States
| | - Gretchen N. Neigh
- Department of Anatomy & Neurobiology, Virginia Commonwealth University, Richmond, VA, United States
| |
Collapse
|
3
|
Orso R, Creutzberg KC, Centeno-Silva A, Carapeços MS, Levandowski ML, Wearick-Silva LE, Viola TW, Grassi-Oliveira R. NFκB1 and NFκB2 gene expression in the prefrontal cortex and hippocampus of early life stressed mice exposed to cocaine-induced conditioned place preference during adolescence. Neurosci Lett 2017; 658:27-31. [DOI: 10.1016/j.neulet.2017.08.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 08/09/2017] [Accepted: 08/13/2017] [Indexed: 11/29/2022]
|
4
|
Affiliation(s)
- Hailan Hu
- Interdisciplinary Institute of Neuroscience and Technology, Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou 310012, People's Republic of China;
- Center for Neuroscience, School of Medicine, Zhejiang University, Hangzhou 310058, People's Republic of China
| |
Collapse
|
5
|
Britt JP, Bonci A. Optogenetic interrogations of the neural circuits underlying addiction. Curr Opin Neurobiol 2013; 23:539-45. [PMID: 23375167 DOI: 10.1016/j.conb.2013.01.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 01/10/2013] [Accepted: 01/11/2013] [Indexed: 11/26/2022]
Abstract
Exposure to addictive drugs can result in maladaptive alterations in neural circuit function. This review highlights recent progress made in identifying the organization, function, and cellular plasticity of the ventral tegmental area (VTA) and nucleus accumbens (NAc), two brain regions strongly implicated in substance use disorders. Emphasis is given to advances made with new research methodologies, particularly optogenetics, which have provided scientists with an unprecedented ability to map neural circuitry and pinpoint drug-induced synaptic modifications. A better understanding of these adaptive events will aid the development of pharmacological treatments for drug addiction and, more generally, further our understanding of motivated behaviors.
Collapse
Affiliation(s)
- Jonathan P Britt
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD 21224, USA
| | | |
Collapse
|
6
|
Abstract
Excitatory afferents to the nucleus accumbens (NAc) are thought to facilitate reward seeking by encoding reward-associated cues. Selective activation of different glutamatergic inputs to the NAc can produce divergent physiological and behavioral responses, but mechanistic explanations for these pathway-specific effects are lacking. Here, we compared the innervation patterns and synaptic properties of ventral hippocampus, basolateral amygdala, and prefrontal cortex input to the NAc. Ventral hippocampal input was found to be uniquely localized to the medial NAc shell, where it was predominant and selectively potentiated after cocaine exposure. In vivo, bidirectional optogenetic manipulations of this pathway attenuated and enhanced cocaine-induced locomotion. Challenging the idea that any of these inputs encode motivationally neutral information, activation of each discrete pathway reinforced instrumental behaviors. Finally, direct optical activation of medium spiny neurons proved to be capable of supporting self-stimulation, demonstrating that behavioral reinforcement is an explicit consequence of strong excitatory drive to the NAc.
Collapse
|