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Gammoh O, Qnais E, Abu Alshaikh H, Mansour M, Al-Habahbeh S, Weshah F, Ennab W, Alotaibi BS, Alqudah A. "PTSD symptoms among patients with multiple sclerosis in Jordan during October 7th gaza war outbreak". Int J Psychiatry Med 2024:912174241272680. [PMID: 39106247 DOI: 10.1177/00912174241272680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
OBJECTIVE Clinicians have noted that the ongoing war on Gaza has had a psychological impact on people with multiple sclerosis (PwMS) whose mental health is particularly vulnerable during times such as these. The present study sought to examine the prevalence and correlates of posttraumatic stress disorder (PTSD) symptoms among PwMS in Jordan during the Gaza war outbreak. METHODS This was a cross-sectional study involving 171 patients (PwMS) out of 372 patients approached (46% response rate) who were being seen in the MS unit at Al Bashir Hospital, Ammann, Jordan. Inclusion criteria required that participants had been following daily news updates of the October 7 war in Gaza for the past 4 months. RESULTS Of participants, 125 (73.1%) were female, 98 (57.3%) were on therapy for less than five years, and 30 (17.5%) reported having a relapse during the past 6 months. Significant PTSD symptoms were identified in 58.5% (100 of 171 participants). Those at higher risk were the unemployed (OR = 2.14, 95% CI = 1.13-4.07, P = 0.02), whereas patients receiving dimethyl fumarate (19.9%) were at lower risk (OR = 0.43, 95% CI = 0.19-0.94, P = 0.02). CONCLUSION The high rate of significant PTSD symptoms among people with MS in this study underscores the need for attention by primary care providers and implementation of a comprehensive multidisciplinary approach to optimize the mental well-being of this fragile population.
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Affiliation(s)
- Omar Gammoh
- Department of Clinical Pharmacy and Pharmacy Practice, Faculty of Pharmacy, Yarmouk University, Irbid, Jordan
| | - Esam Qnais
- Department of Biology and Biotechnology, Faculty of Science, The Hashemite University, Zarqa, Jordan
| | | | | | | | - Feras Weshah
- Department of Neurology, Al-Bashir Hospital, Amman, Jordan
| | - Wail Ennab
- Department of Neurology, Al-Bashir Hospital, Amman, Jordan
| | - Badriyah S Alotaibi
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Abdelrahim Alqudah
- Department of Clinical Pharmacy and Pharmacy Practice, Faculty of Pharmaceutical Sciences, The Hashemite University, Zarqa, Jordan
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Asim M, Wang H, Waris A, Qianqian G, Chen X. Cholecystokinin neurotransmission in the central nervous system: Insights into its role in health and disease. Biofactors 2024. [PMID: 38777339 DOI: 10.1002/biof.2081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 05/08/2024] [Indexed: 05/25/2024]
Abstract
Cholecystokinin (CCK) plays a key role in various brain functions, including both health and disease states. Despite the extensive research conducted on CCK, there remain several important questions regarding its specific role in the brain. As a result, the existing body of literature on the subject is complex and sometimes conflicting. The primary objective of this review article is to provide a comprehensive overview of recent advancements in understanding the central nervous system role of CCK, with a specific emphasis on elucidating CCK's mechanisms for neuroplasticity, exploring its interactions with other neurotransmitters, and discussing its significant involvement in neurological disorders. Studies demonstrate that CCK mediates both inhibitory long-term potentiation (iLTP) and excitatory long-term potentiation (eLTP) in the brain. Activation of the GPR173 receptor could facilitate iLTP, while the Cholecystokinin B receptor (CCKBR) facilitates eLTP. CCK receptors' expression on different neurons regulates activity, neurotransmitter release, and plasticity, emphasizing CCK's role in modulating brain function. Furthermore, CCK plays a pivotal role in modulating emotional states, Alzheimer's disease, addiction, schizophrenia, and epileptic conditions. Targeting CCK cell types and circuits holds promise as a therapeutic strategy for alleviating these brain disorders.
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Affiliation(s)
- Muhammad Asim
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, Hong Kong
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, Hong Kong
- Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Chinese Academy of Sciences, Pak Shek Kok, Hong Kong
| | - Huajie Wang
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, Hong Kong
| | - Abdul Waris
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, Hong Kong
| | - Gao Qianqian
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, Hong Kong
| | - Xi Chen
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, Hong Kong
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, Hong Kong
- Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Chinese Academy of Sciences, Pak Shek Kok, Hong Kong
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Asim M, Wang H, Chen X. Shedding light on cholecystokinin's role in hippocampal neuroplasticity and memory formation. Neurosci Biobehav Rev 2024; 159:105615. [PMID: 38437975 DOI: 10.1016/j.neubiorev.2024.105615] [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: 01/18/2024] [Revised: 02/26/2024] [Accepted: 03/01/2024] [Indexed: 03/06/2024]
Abstract
The hippocampus is a crucial brain region involved in the process of forming and consolidating memories. Memories are consolidated in the brain through synaptic plasticity, and a key mechanism underlying this process is called long-term potentiation (LTP). Recent research has shown that cholecystokinin (CCK) plays a role in facilitating the formation of LTP, as well as learning and memory consolidation. However, the specific mechanisms by which CCK is involved in hippocampal neuroplasticity and memory formation are complicated or poorly understood. This literature review aims to explore the role of LTP in memory formation, particularly in relation to hippocampal memory, and to discuss the implications of CCK and its receptors in the formation of hippocampal memories. Additionally, we will examine the circuitry of CCK in the hippocampus and propose potential CCK-dependent mechanisms of synaptic plasticity that contribute to memory formation.
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Affiliation(s)
- Muhammad Asim
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, Hong Kong; Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, Hong Kong; Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Chinese Academy of Sciences, Hong Kong.
| | - Huajie Wang
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, Hong Kong
| | - Xi Chen
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, Hong Kong; Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, Hong Kong; Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Chinese Academy of Sciences, Hong Kong
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4
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Asim M, Wang H, Chen X, He J. Potentiated GABAergic neuronal activities in the basolateral amygdala alleviate stress-induced depressive behaviors. CNS Neurosci Ther 2024; 30:e14422. [PMID: 37715582 PMCID: PMC10915993 DOI: 10.1111/cns.14422] [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: 12/13/2022] [Revised: 05/22/2023] [Accepted: 08/14/2023] [Indexed: 09/17/2023] Open
Abstract
AIMS Major depressive disorder is a severe psychiatric disorder that afflicts ~17% of the world population. Neuroimaging investigations of depressed patients have consistently reported the dysfunction of the basolateral amygdala in the pathophysiology of depression. However, how the BLA and related circuits are implicated in the pathogenesis of depression is poorly understood. METHODS Here, we combined fiber photometry, immediate early gene expression (c-fos), optogenetics, chemogenetics, behavioral analysis, and viral tracing techniques to provide multiple lines of evidence of how the BLA neurons mediate depressive-like behavior. RESULTS We demonstrated that the aversive stimuli elevated the neuronal activity of the excitatory BLA neurons (BLACAMKII neurons). Optogenetic activation of CAMKII neurons facilitates the induction of depressive-like behavior while inhibition of these neurons alleviates the depressive-like behavior. Next, we found that the chemogenetic inhibition of GABAergic neurons in the BLA (BLAGABA ) increased the firing frequency of CAMKII neurons and mediates the depressive-like phenotypes. Finally, through fiber photometry recording and chemogenetic manipulation, we proved that the activation of BLAGABA neurons inhibits BLACAMKII neuronal activity and alleviates depressive-like behavior in the mice. CONCLUSION Thus, through evaluating BLAGABA and BLACAMKII neurons by distinct interaction, the BLA regulates depressive-like behavior.
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Affiliation(s)
- Muhammad Asim
- Department of NeuroscienceCity University of Hong KongKowloon TongPeople's Republic of China
- Department of Biomedical ScienceCity University of Hong KongKowloon TongPeople's Republic of China
| | - Huajie Wang
- Department of NeuroscienceCity University of Hong KongKowloon TongPeople's Republic of China
- Department of Biomedical ScienceCity University of Hong KongKowloon TongPeople's Republic of China
| | - Xi Chen
- Department of NeuroscienceCity University of Hong KongKowloon TongPeople's Republic of China
- City University of Hong Kong Shenzhen Research InstituteShenzhenPeople's Republic of China
| | - Jufang He
- Department of NeuroscienceCity University of Hong KongKowloon TongPeople's Republic of China
- City University of Hong Kong Shenzhen Research InstituteShenzhenPeople's Republic of China
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Zhang X, Asim M, Fang W, Md Monir H, Wang H, Kim K, Feng H, Wang S, Gao Q, Lai Y, He J. Cholecystokinin B receptor antagonists for the treatment of depression via blocking long-term potentiation in the basolateral amygdala. Mol Psychiatry 2023; 28:3459-3474. [PMID: 37365241 DOI: 10.1038/s41380-023-02127-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 06/01/2023] [Accepted: 06/13/2023] [Indexed: 06/28/2023]
Abstract
Depression is a common and severe mental disorder. Evidence suggested a substantial causal relationship between stressful life events and the onset of episodes of major depression. However, the stress-induced pathogenesis of depression and the related neural circuitry is poorly understood. Here, we investigated how cholecystokinin (CCK) and CCKBR in the basolateral amygdala (BLA) are implicated in stress-mediated depressive-like behavior. The BLA mediates emotional memories, and long-term potentiation (LTP) is widely considered a trace of memory. We identified that the cholecystokinin knockout (CCK-KO) mice impaired LTP in the BLA, while the application of CCK4 induced LTP after low-frequency stimulation (LFS). The entorhinal cortex (EC) CCK neurons project to the BLA and optogenetic activation of EC CCK afferents to BLA-promoted stress susceptibility through the release of CCK. We demonstrated that EC CCK neurons innervate CCKBR cells in the BLA and CCK-B receptor knockout (CCKBR-KO) mice impaired LTP in the BLA. Moreover, the CCKBR antagonists also blocked high-frequency stimulation (HFS) induced LTP formation in the BLA. Notably, CCKBR antagonists infusion into the BLA displayed an antidepressant-like effect in the chronic social defeat stress model. Together, these results indicate that CCKBR could be a potential target to treat depression.
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Affiliation(s)
- Xu Zhang
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
| | - Muhammad Asim
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
| | - Wei Fang
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
| | - Hossain Md Monir
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
| | - Huajie Wang
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
| | - Kyuhee Kim
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
| | - Hemin Feng
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Shujie Wang
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
| | - Qianqian Gao
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
| | - Yuanying Lai
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China
| | - Jufang He
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China.
- Department of Biomedical Science, City University of Hong Kong, Kowloon Tong, 0000, Hong Kong SAR, PR China.
- City University of Hong Kong Shenzhen research institute, Shenzhen, 518507, PR China.
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Gou L, Li Y, Liu S, Sang H, Lan J, Chen J, Wang L, Li C, Lian B, Zhang X, Sun H, Sun L. (2R,6R)-hydroxynorketamine improves PTSD-associated behaviors and structural plasticity via modulating BDNF-mTOR signaling in the nucleus accumbens. J Affect Disord 2023; 335:129-140. [PMID: 37137411 DOI: 10.1016/j.jad.2023.04.101] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 04/16/2023] [Accepted: 04/28/2023] [Indexed: 05/05/2023]
Abstract
BACKGROUND Post-traumatic stress disorder (PTSD) is a mental illness caused by either experiencing or observing a traumatic event that is perceived to pose a serious risk to one's life. (2R,6R)-HNK has an alleviating effect on negative emotions, nevertheless, the mechanism of (2R,6R)-HNK action is unclear. METHODS In this study, the single prolonged stress and electric foot shock (SPS&S) method was used to establish a rat model of PTSD. After determining the validity of the model, (2R,6R)-HNK was administered to the NAc by microinjection using a concentration gradient of 10, 50, and 100 μM, and the effects of the drug in the SPS&S rat model were evaluated. Moreover, our study measured changes in related proteins in the NAc (BDNF, p-mTOR/mTOR, and PSD95) and synaptic ultrastructure. RESULTS In the SPS&S group, the protein expression of brain-derived neurotrophic factor (BDNF), mammalian target of rapamycin (mTOR), and PSD95 was reduced and synaptic morphology was damaged in the NAc. In contrast, after the administration of 50 μM (2R,6R)-HNK, SPS&S-treated rats improved their exploration and depression-linked behavior, while protein levels and synaptic ultrastructure were also restored in the NAc. With the administration of 100 μM (2R,6R)-HNK, locomotor behavior, and social interaction improved in the PTSD model. LIMITATIONS The mechanism of BDNF-mTOR signaling after (2R,6R)-HNK administration was not explored. CONCLUSION (2R,6R)-HNK may ameliorate negative mood and social avoidance symptoms in PTSD rats by regulating BDNF/mTOR-mediated synaptic structural plasticity in the NAc, providing new targets for the development of anti-PTSD drugs.
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Affiliation(s)
- Luping Gou
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Yu Li
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Shiqi Liu
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Haohan Sang
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Jiajun Lan
- School of Clinical Medical, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Jinhong Chen
- College of Extended Education, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Ling Wang
- Clinical Competency Training Center, Medical Experiment and Training Center, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong, 261053, China
| | - Changjiang Li
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Bo Lian
- Department of Bioscience and Technology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Xianqiang Zhang
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China; National Clinical Research Center for Mental Disorders, Peking University Sixth Hospital/Institute of Mental Health and the Key Laboratory of Mental Health, Ministry of Health (Peking University), Beijing, China
| | - Hongwei Sun
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China.
| | - Lin Sun
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China.
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Asim M, Wang H, Waris A. Altered neurotransmission in stress-induced depressive disorders: The underlying role of the amygdala in depression. Neuropeptides 2023; 98:102322. [PMID: 36702033 DOI: 10.1016/j.npep.2023.102322] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 12/30/2022] [Accepted: 01/18/2023] [Indexed: 01/22/2023]
Abstract
Depression is the second leading cause of disability in the world population, for which currently available pharmacological therapies either have poor efficacy or have some adverse effects. Accumulating evidence from clinical and preclinical studies demonstrates that the amygdala is critically implicated in depressive disorders, though the underlying pathogenesis mechanism needs further investigation. In this literature review, we overviewed depression and the key role of Gamma-aminobutyric acid (GABA) and Glutamate neurotransmission in depression. Notably, we discussed a new cholecystokinin-dependent plastic changes mechanism under stress and a possible antidepressant response of cholecystokinin B receptor (CCKBR) antagonist. Moreover, we discussed the fundamental role of the amygdala in depression, to discuss and understand the pathophysiology of depression and the inclusive role of the amygdala in this devastating disorder.
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Affiliation(s)
- Muhammad Asim
- Department of Biomedical science, City University of Hong Kong, Kowloon Tong 0000, Hong Kong; City University of Hong Kong Shenzhen research institute, Shenzhen 518507, PR China; Department of Neuroscience, City University of Hong Kong, Kowloon Tong 0000, Hong Kong.
| | - Huajie Wang
- City University of Hong Kong Shenzhen research institute, Shenzhen 518507, PR China; Department of Neuroscience, City University of Hong Kong, Kowloon Tong 0000, Hong Kong
| | - Abdul Waris
- Department of Biomedical science, City University of Hong Kong, Kowloon Tong 0000, Hong Kong; City University of Hong Kong Shenzhen research institute, Shenzhen 518507, PR China
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Li J, Tong L, Schock BC, Ji LL. Post-traumatic Stress Disorder: Focus on Neuroinflammation. Mol Neurobiol 2023; 60:3963-3978. [PMID: 37004607 DOI: 10.1007/s12035-023-03320-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 03/09/2023] [Indexed: 04/04/2023]
Abstract
Post-traumatic stress disorder (PTSD), gaining increasing attention, is a multifaceted psychiatric disorder that occurs following a stressful or traumatic event or series of events. Recently, several studies showed a close relationship between PTSD and neuroinflammation. Neuroinflammation, a defense response of the nervous system, is associated with the activation of neuroimmune cells such as microglia and astrocytes and with changes in inflammatory markers. In this review, we first analyzed the relationship between neuroinflammation and PTSD: the effect of stress-derived activation of the hypothalamic-pituitary-adrenal (HPA) axis on the main immune cells in the brain and the effect of stimulated immune cells in the brain on the HPA axis. We then summarize the alteration of inflammatory markers in brain regions related to PTSD. Astrocytes are neural parenchymal cells that protect neurons by regulating the ionic microenvironment around neurons. Microglia are macrophages of the brain that coordinate the immunological response. Recent studies on these two cell types provided new insight into neuroinflammation in PTSD. These contribute to promoting comprehension of neuroinflammation, which plays a pivotal role in the pathogenesis of PTSD.
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Affiliation(s)
- Jimeng Li
- Department of 2nd Clinical College, China Medical University, Shenyang, Liaoning, China
| | - Lei Tong
- Department of Anatomy, College of Basic Sciences, China Medical University, Shenyang, Liaoning, China
| | - Bettina C Schock
- The Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast Faculty of Medicine Health and Life Sciences, Belfast, UK
| | - Li-Li Ji
- Department of Anatomy, College of Basic Sciences, China Medical University, Shenyang, Liaoning, China.
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Raymundi AM, Batista Sohn JM, Salemme BW, Cardoso NC, Silveira Guimarães F, Stern CA. Effects of delta-9 tetrahydrocannabinol on fear memory labilization and reconsolidation: A putative role of GluN2B-NMDA receptor within the dorsal hippocampus. Neuropharmacology 2023; 225:109386. [PMID: 36549374 DOI: 10.1016/j.neuropharm.2022.109386] [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: 10/24/2022] [Revised: 12/14/2022] [Accepted: 12/17/2022] [Indexed: 12/23/2022]
Abstract
Cannabis preparations could be an effective reconsolidation-based treatment for post-traumatic stress disorder. However, the effects of Δ9-tetrahydrocannabinol (THC) in fear memory labilization, a critical condition for retrieval-induced reconsolidation, are undetermined. We sought to investigate the effect of a conventional and an ultra-low dose of THC in memory labilization of adult male Wistar rats submitted to contextual fear conditioning. Pretreatment with THC 0.002, but not THC 0.3 mg/kg, i. p., before memory retrieval, did not change memory expression during the retrieval but impaired reconsolidation. No treatment changed freezing expression in an unpaired context. Before retrieval, THC 0.3, but not THC 0.002, decreased GluN2A-NMDA expression and the GluN2A/GluN2B ratio in the dorsal hippocampus (DH) 24 h later. No changes were observed immediately after retrieval. Pretreatment with THC 0.3 abolished the reconsolidation-impairing effect of anisomycin injected into the DH, suggesting an impairment in memory labilization. This effect was associated with an increased freezing expression in the unpaired context and was not observed with the THC ultra-low dose. The GluN2B-NMDA antagonism increased fear generalization in the anisomycin-treated group but restored its reconsolidation-impairing effect and reduced fear generalization when animals were pretreated with THC 0.3. GluN2A-NMDA antagonism or inhibition of the ubiquitin-proteasome system in the DH did not interfere with the effects of THC 0.3. Our findings indicate that THC causes a bidirectional effect on fear memory labilization that depends on hippocampal GluN2B-NMDA receptors' involvement in fear memory generalization.
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Affiliation(s)
- Ana Maria Raymundi
- Department of Pharmacology, Federal University of Parana, Curitiba, PR, Brazil
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10
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Thompson SM. Plasticity of synapses and reward circuit function in the genesis and treatment of depression. Neuropsychopharmacology 2023; 48:90-103. [PMID: 36057649 PMCID: PMC9700729 DOI: 10.1038/s41386-022-01422-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 07/18/2022] [Accepted: 08/01/2022] [Indexed: 11/08/2022]
Abstract
What changes in brain function cause the debilitating symptoms of depression? Can we use the answers to this question to invent more effective, faster acting antidepressant drug therapies? This review provides an overview and update of the converging human and preclinical evidence supporting the hypothesis that changes in the function of excitatory synapses impair the function of the circuits they are embedded in to give rise to the pathological changes in mood, hedonic state, and thought processes that characterize depression. The review also highlights complementary human and preclinical findings that classical and novel antidepressant drugs relieve the symptoms of depression by restoring the functions of these same synapses and circuits. These findings offer a useful path forward for designing better antidepressant compounds.
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Affiliation(s)
- Scott M Thompson
- Department of Psychiatry, University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, 80045, CO, USA.
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11
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Miao HC, Liu M, Wu F, Li HB. Expression changes of c-Fos and D1R/p-ERK1/2 signal pathways in nucleus accumbens of rats after ketamine abuse. Biochem Biophys Res Commun 2022; 629:183-188. [PMID: 36152451 DOI: 10.1016/j.bbrc.2022.08.091] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/05/2022] [Accepted: 08/30/2022] [Indexed: 11/19/2022]
Abstract
Ketamine is a commonly used dissociative anesthetic in clinical applications. However, the abuse potential has posted limits to its use and the mechanism remains to be studied. We aimed to investigate the changes of dopamine D1 receptors (D1R), phosphorylation of extracellular-regulated protein kinase 1/2 (p-ERK1/2), and c-Fos expression in the nucleus accumbens (NAc) of ketamine abuse rats. Ketamine induced severe anxiety in rats, as shown by an open field test. Nissl staining demonstrated clearly different morphologies between neurons of ketamine abuse rats and normal rats. The molecular expression changes were examined using immunohistochemistry assay and western blotting. D1R, p-ERK1/2, and c-Fos were significantly highly-expressed in NAc during ketamine exposure and were decreased by D1R antagonist SCH23390 and MAPK kinases inhibitor U0126. Taken together, the results suggest that ketamine abuse may induce the overexpression of c-Fos in NAc by up-regulating the expression of D1R and p-ERK1/2.
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Affiliation(s)
- Hua-Chun Miao
- Department of Human Anatomy, School of Basic Medical Sciences, Wannan Medical College, 22 West Wenchang Road, Wuhu, 241002, China
| | - Min Liu
- Department of Human Anatomy, School of Basic Medical Sciences, Wannan Medical College, 22 West Wenchang Road, Wuhu, 241002, China
| | - Feng Wu
- Department of Human Anatomy, School of Basic Medical Sciences, Wannan Medical College, 22 West Wenchang Road, Wuhu, 241002, China
| | - Huai-Bin Li
- Department of Human Anatomy, School of Basic Medical Sciences, Wannan Medical College, 22 West Wenchang Road, Wuhu, 241002, China.
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