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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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Xie C, Kessi M, Yin F, Peng J. Roles of KCNA2 in Neurological Diseases: from Physiology to Pathology. Mol Neurobiol 2024:10.1007/s12035-024-04120-9. [PMID: 38517617 DOI: 10.1007/s12035-024-04120-9] [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: 03/31/2023] [Accepted: 03/10/2024] [Indexed: 03/24/2024]
Abstract
Potassium voltage-gated channel subfamily a member 2 (Kv1.2, encoded by KCNA2) is highly expressed in the central and peripheral nervous systems. Based on the patch clamp studies, gain-of function (GOF), loss-of-function (LOF), and a mixed type (GOF/LOF) variants can cause different conditions/disorders. KCNA2-related neurological diseases include epilepsy, intellectual disability (ID), attention deficit/hyperactive disorder (ADHD), autism spectrum disorder (ASD), pain as well as autoimmune and movement disorders. Currently, the molecular mechanisms for the reported variants in causing diverse disorders are unknown. Consequently, this review brings up to date the related information regarding the structure and function of Kv1.2 channel, expression patterns, neuronal localizations, and tetramerization as well as important cell and animal models. In addition, it provides updates on human genetic variants, genotype-phenotype correlations especially highlighting the deep insight into clinical prognosis of KCNA2-related developmental and epileptic encephalopathy, mechanisms, and the potential treatment targets for all KCNA2-related neurological disorders.
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Affiliation(s)
- Changning Xie
- Department of Pediatrics, Xiangya Hospital, Central South University, Xiangya Road 87, Hunan, Changsha, 410008, China
| | - Miriam Kessi
- Department of Pediatrics, Xiangya Hospital, Central South University, Xiangya Road 87, Hunan, Changsha, 410008, China
| | - Fei Yin
- Department of Pediatrics, Xiangya Hospital, Central South University, Xiangya Road 87, Hunan, Changsha, 410008, China
| | - Jing Peng
- Department of Pediatrics, Xiangya Hospital, Central South University, Xiangya Road 87, Hunan, Changsha, 410008, China.
- Hunan Intellectual and Development Disabilities Research Center, Hunan, Changsha, 410008, China.
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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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Borgogna NC, Owen T, Vaughn J, Johnson DAL, Aita SL, Hill BD. So how special is special K? A systematic review and meta-analysis of ketamine for PTSD RCTs. Eur J Psychotraumatol 2024; 15:2299124. [PMID: 38224070 PMCID: PMC10791091 DOI: 10.1080/20008066.2023.2299124] [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: 07/21/2023] [Accepted: 12/13/2023] [Indexed: 01/16/2024] Open
Abstract
Background: PTSD is a significant mental health problem worldwide. Current evidence-based interventions suffer various limitations. Ketamine is a novel agent that is hoped to be incrementally better than extant interventions.Objective: Several randomized control trials (RCTs) of ketamine interventions for PTSD have now been published. We sought to systematically review and meta-analyse results from these trials to evaluate preliminary evidence for ketamine's incremental benefit above-and-beyond control interventions in PTSD treatment.Results: Omnibus findings from 52 effect sizes extracted across six studies (n = 221) yielded a small advantage for ketamine over control conditions at reducing PTSD symptoms (g = 0.27, 95% CI = 0.03, 0.51). However, bias-correction estimates attenuated this effect (adjusted g = 0.20, 95%, CI = -0.08, 0.48). Bias estimates indicated smaller studies reported larger effect sizes favouring ketamine. The only consistent timepoint assessed across RCTs was 24-hours post-initial infusion. Effects at 24-hours post-initial infusion suggest ketamine has a small relative advantage over controls (g = 0.35, 95% CI = 0.06, 0.64). Post-hoc analyses at 24-hours post-initial infusion indicated that ketamine was significantly better than passive controls (g = 0.44, 95% CI = 0.03, 0.85), but not active controls (g = 0.24, 95% CI = -0.30, 0.78). Comparisons one-week into intervention suggested no meaningful group differences (g = 0.24, 95% CI = 0.00, 0.48). No significant differences were evident for RCTs that examined effects two-weeks post initial infusion (g = 0.17, 95% CI = -0.10, 0.44).Conclusions: Altogether, ketamine-for-PTSD RCTs reveal a nominal initial therapeutic advantage relative to controls. However, bias and heterogeneity appear problematic. While rapid acting effects were observed, all control agents (including saline) also evidenced rapid acting effects. We argue blind penetration to be a serious concern, and that placebo is the likely mechanism behind reported therapeutic effects.
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Affiliation(s)
| | - Tyler Owen
- Department of Psychological Sciences, Texas Tech University, Lubbock, TX, USA
| | - Jacob Vaughn
- Department of Psychological Sciences, Texas Tech University, Lubbock, TX, USA
| | - David A. L. Johnson
- Department of Psychological Sciences, Texas Tech University, Lubbock, TX, USA
| | | | - Benjamin D. Hill
- Department of Psychology, University of South Alabama, Mobile, AL, USA
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Ahmadi J, Mansoori A, Mosavat SH, Bazrafshan A. Comparison of ketamine with buprenorphine as adjunctive therapy in the treatment of comorbid major depressive disorder and opium use disorders: A randomized controlled trial. Int J Psychiatry Med 2023:912174231225087. [PMID: 38140979 DOI: 10.1177/00912174231225087] [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: 12/24/2023]
Abstract
BACKGROUND Comorbid major depressive disorder (MDD) and opium use disorder (OUD) are known to increase the risk of suicide. The purpose of this study was to compare the efficacy and safety of adjunctive therapy with either ketamine or buprenorphine as a fast-acting treatment in patients with comorbid MDD and OUD. METHODS This was a randomized double-blind controlled trial in adults admitted to a hospital in Iran. Sixty-six participants were enrolled and received ketamine or buprenorphine, along with current antidepressant therapy. The primary outcome was change in depressive symptoms assessed using Beck Depression Inventory (BDI) after 2 hours, 24 hours, and 7 days. Secondary outcomes included changes in suicidal ideation, evaluated by the Beck Scale for Suicidal Ideation (BSSI). RESULTS Both groups experienced a significant decrease in the severity of depression compared to before the study (P < .05). However, there was no significant difference in the between-group comparison (P > .05). Both groups also exhibited a significant reduction in suicidal ideation compared to before the study, with the severity of this decrease being over 85% in both groups (P < .05). CONCLUSION Both ketamine and buprenorphine appear to be equally effective in reducing symptoms of depression and suicidal ideation among individuals with MDD and OUD.
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Affiliation(s)
- Jamshid Ahmadi
- Substance Abuse Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- IMCES (Institute for Multicultural Counseling and Educational Services), Los Angeles, CA, USA
| | - Arash Mansoori
- Research Center for Psychiatry and Behavioral Science, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Hamdollah Mosavat
- Research Center for Traditional Medicine and History of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Amir Bazrafshan
- Substance Abuse Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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Marazziti D, Carmassi C, Cappellato G, Chiarantini I, Massoni L, Mucci F, Arone A, Violi M, Palermo S, De Iorio G, Dell’Osso L. Novel Pharmacological Targets of Post-Traumatic Stress Disorders. Life (Basel) 2023; 13:1731. [PMID: 37629588 PMCID: PMC10455314 DOI: 10.3390/life13081731] [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: 05/14/2023] [Revised: 08/04/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
Post-traumatic stress disorder (PTSD) is a psychopathological condition with a heterogeneous clinical picture that is complex and challenging to treat. Its multifaceted pathophysiology still remains an unresolved question and certainly contributes to this issue. The pharmacological treatment of PTSD is mainly empirical and centered on the serotonergic system. Since the therapeutic response to prescribed drugs targeting single symptoms is generally inconsistent, there is an urgent need for novel pathogenetic hypotheses, including different mediators and pathways. This paper was conceived as a narrative review with the aim of debating the current pharmacological treatment of PTSD and further highlighting prospective targets for future drugs. The authors accessed some of the main databases of scientific literature available and selected all the papers that fulfilled the purpose of the present work. The results showed that most of the current pharmacological treatments for PTSD are symptom-based and show only partial benefits; this largely reflects the limited knowledge of its neurobiology. Growing, albeit limited, data suggests that the hypothalamic-pituitary-adrenal axis, opioids, glutamate, cannabinoids, oxytocin, neuropeptide Y, and microRNA may play a role in the development of PTSD and could be targeted for novel treatments. Indeed, recent research indicates that examining different pathways might result in the development of novel and more efficient drugs.
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Affiliation(s)
- Donatella Marazziti
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, 56100 Pisa, Italy (L.D.)
- Saint Camillus International University of Health and Medical Sciences, 00131 Rome, Italy
| | - Claudia Carmassi
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, 56100 Pisa, Italy (L.D.)
| | - Gabriele Cappellato
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, 56100 Pisa, Italy (L.D.)
| | - Ilaria Chiarantini
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, 56100 Pisa, Italy (L.D.)
| | - Leonardo Massoni
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, 56100 Pisa, Italy (L.D.)
| | - Federico Mucci
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, 56100 Pisa, Italy (L.D.)
| | - Alessandro Arone
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, 56100 Pisa, Italy (L.D.)
| | - Miriam Violi
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, 56100 Pisa, Italy (L.D.)
| | - Stefania Palermo
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, 56100 Pisa, Italy (L.D.)
| | - Giovanni De Iorio
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, 56100 Pisa, Italy (L.D.)
| | - Liliana Dell’Osso
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, 56100 Pisa, Italy (L.D.)
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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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Cheng S, Xu J, Wang W, Wang R, Li H, Jiang Z, Liu D, Pan F. Inhibition of mGluR5 alters BDNF/TrkB and GLT-1 expression in the prefrontal cortex and hippocampus and ameliorates PTSD-like behavior in rats. Psychopharmacology (Berl) 2023; 240:837-851. [PMID: 36725696 DOI: 10.1007/s00213-023-06325-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 01/23/2023] [Indexed: 02/03/2023]
Abstract
RATIONALE AND OBJECTIVE Post-traumatic stress disorder (PTSD) is a prevalent and debilitating psychiatric disorder. However, its specific etiological mechanism remains unclear. Previous studies have shown that traumatic stress changes metabotropic glutamate receptor 5 (mGluR5) expression in the hippocampus (HIP) and prefrontal cortex (PFC). More importantly, mGluR5 expression is often accompanied by alterations in brain-derived neurotrophic factor (BDNF). Furthermore, BDNF/tropomyosin-associated kinase B (TrkB) signaling plays multiple roles, including roles in neuroplasticity and antidepressant activity, by regulating glutamate transporter-1 (GLT-1) expression. This study aims to explore the effects of inhibiting mGluR5 on PTSD-like behaviors and BDNF, TrkB, and GLT-1 expression in the HIP and PFC of inevitable foot shock (IFS)-treated rats. METHODS Seven-day IFS was used to establish a PTSD rat model, and 2-methyl-6-(phenylethynyl)-pyridine (MPEP) (10 mg/kg, intraperitoneal injection) was used to inhibit the activity of mGluR5 during IFS in rats. After modeling, behavioral changes and mGluR5, BDNF, TrkB, and GLT-1 expression in the PFC and HIP were examined. RESULTS First, the IFS procedure induced PTSD-like behavior. Second, IFS increased the expression of mGluR5 and decreased BDNF, TrkB, and GLT-1 expression in the PFC and HIP. Third, the mGluR5 antagonist blocked the above behavioral and molecular alterations. CONCLUSIONS mGluR5 was involved in IFS-induced PTSD-like behavior by changing BDNF, TrkB, and GLT-1 expression.
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Affiliation(s)
- Shuyue Cheng
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Jingjing Xu
- Department of Clinical Psychology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, 758 Hefei Road, Qingdao, 266035, Shandong, China
| | - Wei Wang
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Rui Wang
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Haonan Li
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Zhijun Jiang
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Dexiang Liu
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Fang Pan
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China.
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11
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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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12
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Elwyn R, Mitchell J, Kohn MR, Driver C, Hay P, Lagopoulos J, Hermens DF. Novel ketamine and zinc treatment for anorexia nervosa and the potential beneficial interactions with the gut microbiome. Neurosci Biobehav Rev 2023; 148:105122. [PMID: 36907256 DOI: 10.1016/j.neubiorev.2023.105122] [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: 11/01/2022] [Revised: 03/04/2023] [Accepted: 03/07/2023] [Indexed: 03/13/2023]
Abstract
Anorexia nervosa (AN) is a severe illness with diverse aetiological and maintaining contributors including neurobiological, metabolic, psychological, and social determining factors. In addition to nutritional recovery, multiple psychological and pharmacological therapies and brain-based stimulations have been explored; however, existing treatments have limited efficacy. This paper outlines a neurobiological model of glutamatergic and γ-aminobutyric acid (GABA)-ergic dysfunction, exacerbated by chronic gut microbiome dysbiosis and zinc depletion at a brain and gut level. The gut microbiome is established early in development, and early exposure to stress and adversity contribute to gut microbial disturbance in AN, early dysregulation to glutamatergic and GABAergic networks, interoceptive impairment, and inhibited caloric harvest from food (e.g., zinc malabsorption, competition for zinc ions between gut bacteria and host). Zinc is a key part of glutamatergic and GABAergic networks, and also affects leptin and gut microbial function; systems dysregulated in AN. Low doses of ketamine in conjunction with zinc, could provide an efficacious combination to act on NMDA receptors and normalise glutamatergic, GABAergic and gut function in AN.
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Affiliation(s)
- Rosiel Elwyn
- Thompson Institute, University of the Sunshine Coast, Birtinya, QLD, Australia; SouthWest Sydney Local Health District, Liverpool Hospital, Liverpool, NSW, Australia.
| | - Jules Mitchell
- Thompson Institute, University of the Sunshine Coast, Birtinya, QLD, Australia; SouthWest Sydney Local Health District, Liverpool Hospital, Liverpool, NSW, Australia
| | - Michael R Kohn
- AYA Medicine Westmead Hospital, CRASH (Centre for Research into Adolescent's Health) Western Sydney Local Health District, Sydney University, Australia; SouthWest Sydney Local Health District, Liverpool Hospital, Liverpool, NSW, Australia
| | - Christina Driver
- Thompson Institute, University of the Sunshine Coast, Birtinya, QLD, Australia; SouthWest Sydney Local Health District, Liverpool Hospital, Liverpool, NSW, Australia
| | - Phillipa Hay
- Translational Health Research Institute (THRI) School of Medicine, Western Sydney University, Campbelltown, NSW, Australia; SouthWest Sydney Local Health District, Liverpool Hospital, Liverpool, NSW, Australia
| | - Jim Lagopoulos
- Thompson Institute, University of the Sunshine Coast, Birtinya, QLD, Australia; SouthWest Sydney Local Health District, Liverpool Hospital, Liverpool, NSW, Australia
| | - Daniel F Hermens
- Thompson Institute, University of the Sunshine Coast, Birtinya, QLD, Australia; SouthWest Sydney Local Health District, Liverpool Hospital, Liverpool, NSW, Australia
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13
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Peixoto Brito ML, Reis Macedo LF, de Siqueira Coelho Lisboa KW, dos Santos Sales V, de Lima Pinto S, Felix Silva DS. Neurocritical Patients: Review of the Scope of Nursing Diagnoses and Care in the Intensive Care Unit. SAGE Open Nurs 2023; 9:23779608231158978. [PMID: 36861053 PMCID: PMC9969437 DOI: 10.1177/23779608231158978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/29/2023] [Accepted: 02/05/2023] [Indexed: 03/03/2023] Open
Abstract
Objective To identify the diagnoses and nursing care for neurocritical patients in the intensive care unit. Method This is a scope review study, based on the Joanna Briggs Institute, led by the following guiding question: what are the diagnoses and nursing care for neurocritical patients in the intensive care unit? Data collection was carried out in February 2022 in a paired manner, in the following databases: EMBASE, MEDLINE, PubMed, and SCOPUS. For sample selection, the following search strategy was used: "Neurology" AND "Nursing Care" OR "Nursing Diagnosis" AND "Critical Care." Studies were independently selected, blinded by two reviewers. Result It was possible to identify 854 studies, which after analysis by title and abstract, only 27 articles passed the eligibility, of which 10 were part of this review. Conclusion According to the analysis of the studies, it was found that nursing care, combined with a care plan for neurocritical patients, allows for better results, with a view to the quality of life and health promotion.
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Affiliation(s)
- Maria Luiza Peixoto Brito
- Center for Health and Biological Sciences, Laboratory of Nursing in
Neurosciences, Regional University of Cariri, Ceará, Brazil
| | - Luis Fernando Reis Macedo
- Center for Health and Biological Sciences, Laboratory of Nursing in
Neurosciences, Regional University of Cariri, Ceará, Brazil,Luis Fernando Reis Macedo, Center for
Health and Biological Sciences, Laboratory of Nursing in Neurosciences, Regional
University of Cariri, Ceará, Brazil.
| | | | - Valterlúcio dos Santos Sales
- Center for Health and Biological Sciences, Laboratory of Nursing in
Neurosciences, Regional University of Cariri, Ceará, Brazil
| | | | - Darly Suyane Felix Silva
- Center for Health and Biological Sciences, Laboratory of Nursing in
Neurosciences, Regional University of Cariri, Ceará, Brazil
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14
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Tian Y, Ullah H, Gu J, Li K. Immune-metabolic mechanisms of post-traumatic stress disorder and atherosclerosis. Front Physiol 2023; 14:1123692. [PMID: 36846337 PMCID: PMC9944953 DOI: 10.3389/fphys.2023.1123692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 01/30/2023] [Indexed: 02/10/2023] Open
Abstract
The interaction of post-traumatic stress disorder (PTSD) and atherosclerosis (AS) increase the risk of mortality. Metabolism and immunity play important roles in the comorbidity associated with PTSD and AS. The adenosine monophosphate-activated protein kinase/mammalian target of rapamycin and phosphatidylinositol 3-kinase/Akt pathways are attractive research topics in the fields of metabolism, immunity, and autophagy. They may be effective intervention targets in the prevention and treatment of PTSD comorbidity with AS. Herein, we comprehensively review metabolic factors, including glutamate and lipid alterations, in PTSD comorbidity with AS and discuss the possible implications in the pathophysiology of the diseases.
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Affiliation(s)
- Yali Tian
- West China School of Nursing/West China Hospital, Sichuan University, Chengdu, China
| | - Hanif Ullah
- West China School of Nursing/West China Hospital, Sichuan University, Chengdu, China
| | - Jun Gu
- Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Ka Li
- West China School of Nursing/West China Hospital, Sichuan University, Chengdu, China,*Correspondence: Ka Li,
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15
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Albuquerque TRD, Macedo LFR, Delmondes GDA, Rolim Neto ML, Almeida TM, Uchida RR, Cordeiro Q, Lisboa KWDSC, Menezes IRAD. Evidence for the beneficial effect of ketamine in the treatment of patients with post-traumatic stress disorder: A systematic review and meta-analysis. J Cereb Blood Flow Metab 2022; 42:2175-2187. [PMID: 35891578 PMCID: PMC9670007 DOI: 10.1177/0271678x221116477] [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: 12/14/2022]
Abstract
Post-traumatic stress disorder (PTSD) is an anxiety disorder with manifestations somatic resulting from reliving the trauma. The therapy for the treatment of PTSD has limitations, between reduced efficacy and "PTSD pharmacotherapeutic crisis". Scientific evidence has shown that the use of ketamine has benefits for the treatment of depressive disorders and other symptoms present in PTSD compared to other conventional therapies. Therefore, this study aims to analyze the available evidence on the effect of ketamine in the treatment of post-traumatic stress. The systematic review and the meta-analysis were conducted following PRISMA guidelines and RevManager software, using randomized controlled trials and eligible studies of quality criteria for data extraction and analysis. The sample design evaluated included the last ten years, whose search resulted in 594 articles. After applying the exclusion criteria, 35 articles were selected, of which 14 articles were part of the sample, however, only six articles were selected the meta-analysis. The results showed that the ketamine is a promising drug in the management of PTSD with effect more evident performed after 24 h evaluated by MADRS scale. However, the main limitations of the present review demonstrate that more high-quality studies are needed to investigate the influence of therapy, safety, and efficacy.
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Affiliation(s)
| | | | - Gyllyandeson de Araújo Delmondes
- Laboratory of Pharmacology and Molecular Chemistry, Department of Biological Chemistry, Regional University of Cariri-URCA, Crato, Brazil
| | | | - Thales Marcon Almeida
- Mental Health Department, Santa Casa de São Paulo School of Medical Sciences, São Paulo, Brazil
| | - Ricardo Riyoiti Uchida
- Mental Health Department, Santa Casa de São Paulo School of Medical Sciences, São Paulo, Brazil
| | - Quirino Cordeiro
- Mental Health Department, Santa Casa de São Paulo School of Medical Sciences, São Paulo, Brazil
| | | | - Irwin Rose Alencar de Menezes
- Laboratory of Pharmacology and Molecular Chemistry, Department of Biological Chemistry, Regional University of Cariri-URCA, Crato, Brazil
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16
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Circuits regulating pleasure and happiness - focus on potential biomarkers for circuitry including the habenuloid complex. Acta Neuropsychiatr 2022; 34:229-239. [PMID: 35587050 DOI: 10.1017/neu.2022.15] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION The multiplicity and complexity of the neuronal connections in the central nervous system make it difficult to disentangle circuits that play an essential role in the development or treatment of (neuro)psychiatric disorders. By choosing the evolutionary development of the forebrain as a starting point, a certain order in the connections can be created. The dorsal diencephalic connection (DDC) system can be applied for the development of biomarkers that can predict treatment response. MATERIALS AND METHODS After providing a brief introduction to the theory, we examined neuroanatomical publications on the connectivity of the DDC system. We then searched for neurochemical components that are specific for the habenula. RESULTS AND DISCUSSION The best strategy to find biomarkers that reflect the function of the habenular connection is to use genetic variants of receptors, transporters or enzymes specific to this complex. By activating these with probes and measuring the response in people with different functional genotypes, the usefulness of biomarkers can be assessed. CONCLUSIONS The most promising biomarkers in this respect are those linked to activation or inhibition of the nicotine receptor, dopamine D4 receptor, μ-opioid receptor and also those of the functioning of habenular glia cells (astrocytes and microglia).
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17
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Ketamine attenuates the PTSD-like effect via regulation of glutamatergic signaling in the nucleus accumbens of mice. Mol Cell Neurosci 2022; 120:103723. [PMID: 35351607 DOI: 10.1016/j.mcn.2022.103723] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/28/2022] [Accepted: 03/23/2022] [Indexed: 01/29/2023] Open
Abstract
Post-traumatic stress disorder (PTSD) is a devastating mental illness with high morbidity and major social and economic burden. Currently, there is no promising therapy available for the treatment of PTSD. Some clinical studies showed that ketamine could effectively alleviate PTSD symptoms. However, it is still unclear which brain region ketamine targets and how it attenuates the PTSD-like effects. In this study, we examined the effect of ketamine on fear generalization (a core symptom of PTSD) by using a mice model of fear generalization induced by fear conditioning procedure. Before retrieval, ketamine was locally infused into the nucleus accumbens (a brain region closely associated with PTSD). Fear generalization mice were subjected to behavioral testing and biochemical assessments, following ketamine infusion. The results showed that the foot shock strength-dependently induced fear generalization in mice with increased c-fos activity, and a lower level of GluR1(S845), GluR1(S831) protein, and a higher level of P-GluN2B protein in the nucleus accumbens (NAc). Local infusion of ketamine into NAc decreased the fear generalization together with an increased level of GluR1(S845), GluR1(S831) protein, and decreased level of P-GluN2B protein. Altogether, these results conclude that ketamine might affect the glutamatergic signaling in the NAc to attenuate the fear generalization in mice.
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18
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Ragnhildstveit A, Slayton M, Jackson LK, Brendle M, Ahuja S, Holle W, Moore C, Sollars K, Seli P, Robison R. Ketamine as a Novel Psychopharmacotherapy for Eating Disorders: Evidence and Future Directions. Brain Sci 2022; 12:brainsci12030382. [PMID: 35326338 PMCID: PMC8963252 DOI: 10.3390/brainsci12030382] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 03/02/2022] [Accepted: 03/09/2022] [Indexed: 02/01/2023] Open
Abstract
Eating disorders (EDs) are serious, life-threatening psychiatric conditions associated with physical and psychosocial impairment, as well as high morbidity and mortality. Given the chronic refractory nature of EDs and the paucity of evidence-based treatments, there is a pressing need to identify novel approaches for this population. The noncompetitive N-methyl-D-aspartate receptor (NMDAr) antagonist, ketamine, has recently been approved for treatment-resistant depression, exerting rapid and robust antidepressant effects. It is now being investigated for several new indications, including obsessive–compulsive, post-traumatic, and substance use disorder, and shows transdiagnostic potential for EDs, particularly among clinical nonresponders. Hence, the aim of this review is to examine contemporary findings on the treatment of EDs with ketamine, whether used as a primary, adjunctive, or combination psychopharmacotherapy. Avenues for future research are also discussed. Overall, results are encouraging and point to therapeutic value; however, are limited to case series and reports on anorexia nervosa. Further empirical research is thus needed to explore ketamine efficacy across ED subgroups, establish safety profiles and optimize dosing, and develop theory-driven, targeted treatment strategies at the individual patient level.
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Affiliation(s)
- Anya Ragnhildstveit
- Department of Psychology and Neuroscience, Duke University, Durham, NC 27708, USA; (M.S.); (P.S.)
- Integrated Research Literacy Group, Draper, UT 84020, USA; (L.K.J.); (M.B.); (W.H.)
- Correspondence: ; Tel.: +1-(801)-448-3331
| | - Matthew Slayton
- Department of Psychology and Neuroscience, Duke University, Durham, NC 27708, USA; (M.S.); (P.S.)
- Integrated Research Literacy Group, Draper, UT 84020, USA; (L.K.J.); (M.B.); (W.H.)
| | - Laura Kate Jackson
- Integrated Research Literacy Group, Draper, UT 84020, USA; (L.K.J.); (M.B.); (W.H.)
- Novamind, Draper, UT 84020, USA; (S.A.); (C.M.); (K.S.); (R.R.)
| | - Madeline Brendle
- Integrated Research Literacy Group, Draper, UT 84020, USA; (L.K.J.); (M.B.); (W.H.)
- Novamind, Draper, UT 84020, USA; (S.A.); (C.M.); (K.S.); (R.R.)
- Department of Pharmacotherapy, University of Utah College of Pharmacy, Salt Lake City, UT 84112, USA
| | - Sachin Ahuja
- Novamind, Draper, UT 84020, USA; (S.A.); (C.M.); (K.S.); (R.R.)
| | - Willis Holle
- Integrated Research Literacy Group, Draper, UT 84020, USA; (L.K.J.); (M.B.); (W.H.)
| | - Claire Moore
- Novamind, Draper, UT 84020, USA; (S.A.); (C.M.); (K.S.); (R.R.)
| | - Kellie Sollars
- Novamind, Draper, UT 84020, USA; (S.A.); (C.M.); (K.S.); (R.R.)
| | - Paul Seli
- Department of Psychology and Neuroscience, Duke University, Durham, NC 27708, USA; (M.S.); (P.S.)
| | - Reid Robison
- Novamind, Draper, UT 84020, USA; (S.A.); (C.M.); (K.S.); (R.R.)
- Department of Psychiatry, University of Utah School of Medicine, Salt Lake City, UT 84108, USA
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19
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Keeler JL, Treasure J, Juruena MF, Kan C, Himmerich H. Ketamine as a Treatment for Anorexia Nervosa: A Narrative Review. Nutrients 2021; 13:4158. [PMID: 34836413 PMCID: PMC8625822 DOI: 10.3390/nu13114158] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 11/16/2021] [Accepted: 11/18/2021] [Indexed: 02/05/2023] Open
Abstract
Anorexia nervosa (AN) is a highly complex disorder to treat, especially in severe and enduring cases. Whilst the precise aetiology of the disorder is uncertain, malnutrition and weight loss can contribute to reductions in grey and white matter of the brain, impairments in neuroplasticity and neurogenesis and difficulties with cognitive flexibility, memory and learning. Depression is highly comorbid in AN and may be a barrier to recovery. However, traditional antidepressants are often ineffective in alleviating depressive symptoms in underweight patients with AN. There is an urgent need for new treatment approaches for AN. This review gives a conceptual overview for the treatment of AN with ketamine. Ketamine has rapid antidepressant effects, which are hypothesised to occur via increases in glutamate, with sequelae including increased neuroplasticity, neurogenesis and synaptogenesis. This article provides an overview of the use of ketamine for common psychiatric comorbidities of AN and discusses particular safety concerns and side effects. Potential avenues for future research and specific methodological considerations are explored. Overall, there appears to be ample theoretical background, via several potential mechanisms, that warrant the exploration of ketamine as a treatment for adults with AN.
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Affiliation(s)
- Johanna Louise Keeler
- Section of Eating Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London SE5 8AF, UK; (J.T.); (H.H.)
| | - Janet Treasure
- Section of Eating Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London SE5 8AF, UK; (J.T.); (H.H.)
- South London and Maudsley NHS Foundation Trust, Bethlem Royal Hospital, Monks Orchard Road, Beckenham BR3 3BX, UK;
| | - Mario F. Juruena
- South London and Maudsley NHS Foundation Trust, Bethlem Royal Hospital, Monks Orchard Road, Beckenham BR3 3BX, UK;
- Centre for Affective Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London SE5 8AF, UK
| | - Carol Kan
- Eating Disorder Service, Central and North West London NHS Foundation Trust, 1 Nightingale Place, Kensington & Chelsea, London SW10 9NG, UK;
| | - Hubertus Himmerich
- Section of Eating Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London SE5 8AF, UK; (J.T.); (H.H.)
- South London and Maudsley NHS Foundation Trust, Bethlem Royal Hospital, Monks Orchard Road, Beckenham BR3 3BX, UK;
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20
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Philipp-Muller AE, Reshetukha T, Vazquez G, Milev R, Armstrong D, Jagayat J, Alavi N. Combining Ketamine and Internet-Based Cognitive Behavioral Therapy for the Treatment of Posttraumatic Stress Disorder: Protocol for a Randomized Controlled Trial. JMIR Res Protoc 2021; 10:e30334. [PMID: 34092549 PMCID: PMC8335614 DOI: 10.2196/30334] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 01/23/2023] Open
Abstract
Background Over one third of patients with posttraumatic stress disorder (PTSD) do not respond to current interventions. Ketamine presents a potential treatment option; however, its effects are temporary. Administering ketamine alongside psychotherapy is one potential means of prolonging its effects; however, only a few studies have investigated this treatment method to date, and none have tested ketamine with internet-based or electronically delivered cognitive behavioral therapy (e-CBT). Objective This open-label randomized controlled trial aims to assess the efficacy of a combined treatment method of subanesthetic intravenous ketamine and e-CBT for treating patients with PTSD. Methods In total, 20 patients with refractory PTSD recruited from a community clinic will be randomly assigned to either an experimental group (n=10), receiving a combination of ketamine and therapist-administered e-CBT over 14 weeks, or a waitlist control group (n=10), receiving the experimental treatment after 14 weeks. Both groups will be assessed for the symptoms of PTSD and comorbid disorders before treatment, at two midway points, and at the end of the experiment. Results PTSD symptoms of participants in the experimental group are expected to improve significantly more than those of participants in the waitlist control group (P=.05) with a large effect size (η2=0.14). Conclusions This is the first study to assess the relationship between e-CBT and ketamine and their combined ability to treat refractory PTSD. If successful, this study will open web-based, asynchronous therapeutic options for patients with PTSD and will provide new insights into the functional role of glutamate in trauma-related disorders as well as in learning, memory, and fear extinction. Trial Registration ClinicalTrials.gov NCT04771767; https://clinicaltrials.gov/ct2/show/NCT04771767. International Registered Report Identifier (IRRID) PRR1-10.2196/30334
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Affiliation(s)
| | - Taras Reshetukha
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada.,Department of Psychiatry, Queen's University, Kingston, ON, Canada
| | - Gustavo Vazquez
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada.,Department of Psychiatry, Queen's University, Kingston, ON, Canada
| | - Roumen Milev
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada.,Department of Psychiatry, Queen's University, Kingston, ON, Canada
| | - Dawn Armstrong
- Department of Psychiatry, Queen's University, Kingston, ON, Canada
| | - Jasleen Jagayat
- Department of Psychiatry, Queen's University, Kingston, ON, Canada
| | - Nazanin Alavi
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada.,Department of Psychiatry, Queen's University, Kingston, ON, Canada
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