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Gupta A, Vejapi M, Knezevic NN. The role of nitric oxide and neuroendocrine system in pain generation. Mol Cell Endocrinol 2024; 591:112270. [PMID: 38750811 DOI: 10.1016/j.mce.2024.112270] [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: 01/25/2024] [Revised: 03/13/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024]
Abstract
Previous studies have indicated a complex interplay between the nitric oxide (NO) pain signaling pathways and hormonal signaling pathways in the body. This article delineates the role of nitric oxide signaling in neuropathic and inflammatory pain generation and subsequently discusses how the neuroendocrine system is involved in pain generation. Hormonal systems including the hypothalamic-pituitary axis (HPA) generation of cortisol, the renin-angiotensin-aldosterone system, calcitonin, melatonin, and sex hormones could potentially contribute to the generation of nitric oxide involved in the sensation of pain. Further research is necessary to clarify this relationship and may reveal therapeutic targets involving NO signaling that alleviate neuropathic and inflammatory pain.
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Affiliation(s)
- Aayush Gupta
- Department of Anesthesiology, Advocate Illinois Masonic Medical Center, Chicago, IL, USA; Rosalind Franklin University of Medicine and Science, USA
| | - Maja Vejapi
- Department of Anesthesiology, Advocate Illinois Masonic Medical Center, Chicago, IL, USA
| | - Nebojsa Nick Knezevic
- Department of Anesthesiology, Advocate Illinois Masonic Medical Center, Chicago, IL, USA; Department of Anesthesiology, University of Illinois, Chicago, IL, USA; Department of Surgery, University of Illinois, Chicago, IL, USA.
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2
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Lei J, Tang LL, You HJ. Pathological pain: Non-motor manifestations in Parkinson disease and its treatment. Neurosci Biobehav Rev 2024; 161:105646. [PMID: 38569983 DOI: 10.1016/j.neubiorev.2024.105646] [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: 01/12/2024] [Revised: 03/13/2024] [Accepted: 03/26/2024] [Indexed: 04/05/2024]
Abstract
In addition to motor symptoms, non-motor manifestations of Parkinson's disease (PD), i.e. pain, depression, sleep disturbance, and autonomic disorders, have received increasing attention. As one of the non-motor symptoms, pain has a high prevalence and is considered an early pre-motor symptom in the development of PD. In relation to pathological pain and its management in PD, particularly in the early stages, it is hypothesized that the loss of dopaminergic neurons causes a functional deficit in supraspinal structures, leading to an imbalance in endogenous descending modulation. Deficits in dopaminergic-dependent pathways also affect non-dopaminergic neurotransmitter systems that contribute to the pathological processing of nociceptive input, the integration, and modulation of pain in PD. This review examines the onset and progression of pain in PD, with a particular focus on alterations in the central modulation of nociception. The discussion highlights the importance of abnormal endogenous descending facilitation and inhibition in PD pain, which may provide potential clues to a better understanding of the nature of pathological pain and its effective clinical management.
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Affiliation(s)
- Jing Lei
- Center for Translational Medicine Research on Sensory-Motor Diseases, Yan'an University, Yan'an 716000, China; Key Laboratory of Yan'an Sports Rehabilitation Medicine, Yan'an 716000, China
| | - Lin-Lin Tang
- Center for Translational Medicine Research on Sensory-Motor Diseases, Yan'an University, Yan'an 716000, China
| | - Hao-Jun You
- Center for Translational Medicine Research on Sensory-Motor Diseases, Yan'an University, Yan'an 716000, China; Key Laboratory of Yan'an Sports Rehabilitation Medicine, Yan'an 716000, China.
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3
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Sif-Eddine W, Ba-M'hamed S, Lefranc B, Leprince J, Boukhzar L, Anouar Y, Bennis M. Selenoprotein T, a potential treatment of attention-deficit/hyperactivity disorder and comorbid pain in neonatal 6-OHDA lesioned mice. Exp Mol Pathol 2024; 137:104905. [PMID: 38797131 DOI: 10.1016/j.yexmp.2024.104905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 05/21/2024] [Accepted: 05/22/2024] [Indexed: 05/29/2024]
Abstract
pathological pain and Attention-deficit/hyperactivity disorder (ADHD) are two complex multifactorial syndromes. The comorbidity of ADHD and altered pain perception is well documented in children, adolescents, and adults. According to pathophysiological investigations, the dopaminergic system's dysfunction provides a common basis for ADHD and comorbid pain. Growing evidence suggests that oxidative stress may be crucial in both pathologies. Recent studies revealed that a small peptide encompassing the redox-active site of selenoprotein T (PSELT), protects dopaminergic neurons and fibers as well as lesioned nerves in animal models. The current study aims to examine the effects of PSELT treatment on ADHD-like symptoms and pain sensitivity, as well as the role of catecholaminergic systems in these effects. Our results demonstrated that intranasal administration of PSELT reduced the hyperactivity in the open field, decreased the impulsivity displayed by 6-OHDA-lesioned male mice in the 5-choice serial reaction time task test and improved attentional performance. In addition, PSELT treatment significantly increased the nociception threshold in both normal and inflammatory conditions. Furthermore, anti-hyperalgesic activity was antagonized with sulpiride pre-treatment, but not by phentolamine, or propranolol pre-treatments. The present study suggests that PSELT reduces the severity of ADHD symptoms in mice and possesses potent antinociceptive effects which could be related to the involvement of D2/D3 dopaminergic receptors.
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Affiliation(s)
- Wahiba Sif-Eddine
- Laboratory of Pharmacology, Neurobiology, Anthropobiology, and Environment, Faculty of Sciences, Cadi Ayyad University, Marrakesh, Morocco
| | - Saadia Ba-M'hamed
- Laboratory of Pharmacology, Neurobiology, Anthropobiology, and Environment, Faculty of Sciences, Cadi Ayyad University, Marrakesh, Morocco
| | - Benjamin Lefranc
- Univ Rouen Normandie, INSERM, NorDiC, UMR 1239, Rouen, France; Institute for Research and Innovation in Biomedicine, Rouen, France
| | - Jérôme Leprince
- Univ Rouen Normandie, INSERM, NorDiC, UMR 1239, Rouen, France; Institute for Research and Innovation in Biomedicine, Rouen, France
| | - Loubna Boukhzar
- Laboratory of Pharmacology, Neurobiology, Anthropobiology, and Environment, Faculty of Sciences, Cadi Ayyad University, Marrakesh, Morocco; Univ Rouen Normandie, INSERM, NorDiC, UMR 1239, Rouen, France; Institute for Research and Innovation in Biomedicine, Rouen, France
| | - Youssef Anouar
- Univ Rouen Normandie, INSERM, NorDiC, UMR 1239, Rouen, France; Institute for Research and Innovation in Biomedicine, Rouen, France.
| | - Mohamed Bennis
- Laboratory of Pharmacology, Neurobiology, Anthropobiology, and Environment, Faculty of Sciences, Cadi Ayyad University, Marrakesh, Morocco
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4
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Sandoval A, Duran P, Corzo-López A, Fernández-Gallardo M, Muñoz-Herrera D, Leyva-Leyva M, González-Ramírez R, Felix R. The role of voltage-gated calcium channels in the pathogenesis of Parkinson's disease. Int J Neurosci 2024; 134:452-461. [PMID: 35993158 DOI: 10.1080/00207454.2022.2115905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 06/07/2022] [Accepted: 07/29/2022] [Indexed: 10/15/2022]
Abstract
Aim: Voltage-gated calcium (CaV) channels play an essential role in maintaining calcium homeostasis and regulating numerous physiological processes in neurons. Therefore, dysregulation of calcium signaling is relevant in many neurological disorders, including Parkinson's disease (PD). This review aims to introduce the role of CaV channels in PD and discuss some novel aspects of channel regulation and its impact on the molecular pathophysiology of the disease. Methods: an exhaustive search of the literature in the field was carried out using the PubMed database of The National Center for Biotechnology Information. Systematic searches were performed from the initial date of publication to May 2022. Results: Although α-synuclein aggregates are the main feature of PD, L-type calcium (CaV1) channels seem to play an essential role in the pathogenesis of PD. Changes in the functional expression of CaV1.3 channels alter Calcium homeostasis and contribute to the degeneration of dopaminergic neurons. Furthermore, recent studies suggest that CaV channel trafficking towards the cell membrane depends on the activity of the ubiquitin-proteasome system (UPS). In PD, there is an increase in the expression of L-type channels associated with a decrease in the expression of Parkin, an E3 enzyme of the UPS. Therefore, a link between Parkin and CaV channels could play a fundamental role in the pathogenesis of PD and, as such, could be a potentially attractive target for therapeutic intervention. Conclusion: The study of alterations in the functional expression of CaV channels will provide a framework to understand better the neurodegenerative processes that occur in PD and a possible path toward identifying new therapeutic targets to treat this condition.
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Affiliation(s)
- Alejandro Sandoval
- School of Medicine FES Iztacala, National Autonomous University of Mexico (UNAM), Tlalnepantla, Mexico
| | - Paz Duran
- Department of Cell Biology, Centre for Research and Advanced Studies (Cinvestav), Mexico City, Mexico
| | - Alejandra Corzo-López
- Department of Cell Biology, Centre for Research and Advanced Studies (Cinvestav), Mexico City, Mexico
| | | | - David Muñoz-Herrera
- Department of Cell Biology, Centre for Research and Advanced Studies (Cinvestav), Mexico City, Mexico
| | - Margarita Leyva-Leyva
- Department of Molecular Biology and Histocompatibility, "Dr. Manuel Gea González" General Hospital, Mexico City, Mexico
| | - Ricardo González-Ramírez
- Department of Molecular Biology and Histocompatibility, "Dr. Manuel Gea González" General Hospital, Mexico City, Mexico
| | - Ricardo Felix
- Department of Cell Biology, Centre for Research and Advanced Studies (Cinvestav), Mexico City, Mexico
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da Silva MDV, da Silva Bonassa L, Piva M, Basso CR, Zaninelli TH, Machado CCA, de Andrade FG, Miqueloto CA, Sant Ana DDMG, Aktar R, Peiris M, Aziz Q, Blackshaw LA, Verri WA, de Almeida Araújo EJ. Perineuronal net in the extrinsic innervation of the distal colon of mice and its remodeling in ulcerative colitis. J Neurochem 2024. [PMID: 38426587 DOI: 10.1111/jnc.16080] [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: 10/16/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 03/02/2024]
Abstract
The perineuronal net (PNN) is a well-described highly specialized extracellular matrix structure found in the central nervous system. Thus far, no reports of its presence or connection to pathological processes have been described in the peripheral nervous system. Our study demonstrates the presence of a PNN in the spinal afferent innervation of the distal colon of mice and characterizes structural and morphological alterations induced in an ulcerative colitis (UC) model. C57Bl/6 mice were given 3% dextran sulfate sodium (DSS) to induce acute or chronic UC. L6/S1 dorsal root ganglia (DRG) were collected. PNNs were labeled using fluorescein-conjugated Wisteria Floribunda (WFA) l lectin, and calcitonin gene-related peptide (CGRP) immunofluorescence was used to detect DRG neurons. Most DRG cell bodies and their extensions toward peripheral nerves were found surrounded by the PNN-like structure (WFA+), labeling neurons' cytoplasm and the pericellular surfaces. The amount of WFA+ neuronal cell bodies was increased in both acute and chronic UC, and the PNN-like structure around cell bodies was thicker in UC groups. In conclusion, a PNN-like structure around DRG neuronal cell bodies was described and found modulated by UC, as changes in quantity, morphology, and expression profile of the PNN were detected, suggesting a potential role in sensory neuron peripheral sensitization, possibly modulating the pain profile of ulcerative colitis.
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Affiliation(s)
- Matheus Deroco Veloso da Silva
- Laboratory of Neurogastroenterology, Department of Histology, State University of Londrina, Londrina, Paraná, Brazil
- Laboratory of Pain, Inflammation, Neuropathy and Cancer, Department of Pathology, State University of Londrina, Londrina, Paraná, Brazil
| | - Larissa da Silva Bonassa
- Laboratory of Neurogastroenterology, Department of Histology, State University of Londrina, Londrina, Paraná, Brazil
| | - Maiara Piva
- Laboratory of Pain, Inflammation, Neuropathy and Cancer, Department of Pathology, State University of Londrina, Londrina, Paraná, Brazil
| | - Camila Regina Basso
- Laboratory of Neurogastroenterology, Department of Histology, State University of Londrina, Londrina, Paraná, Brazil
| | - Tiago Henrique Zaninelli
- Laboratory of Pain, Inflammation, Neuropathy and Cancer, Department of Pathology, State University of Londrina, Londrina, Paraná, Brazil
| | - Camila Cristina Alves Machado
- Laboratory of Neurogastroenterology, Department of Histology, State University of Londrina, Londrina, Paraná, Brazil
| | - Fábio Goulart de Andrade
- Laboratory of Histopathological Analysis, Department of Histology, State University of Londrina, Londrina, Paraná, Brazil
| | - Carlos Alberto Miqueloto
- Laboratory of Neurogastroenterology, Department of Histology, State University of Londrina, Londrina, Paraná, Brazil
| | | | - Rubina Aktar
- Wingate Institute for Neurogastroenterology, Queen Mary University of London, London, UK
| | - Madusha Peiris
- Wingate Institute for Neurogastroenterology, Queen Mary University of London, London, UK
| | - Qasim Aziz
- Wingate Institute for Neurogastroenterology, Queen Mary University of London, London, UK
| | - L Ashley Blackshaw
- Wingate Institute for Neurogastroenterology, Queen Mary University of London, London, UK
| | - Waldiceu A Verri
- Laboratory of Pain, Inflammation, Neuropathy and Cancer, Department of Pathology, State University of Londrina, Londrina, Paraná, Brazil
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Buhidma Y, Lama J, Duty S. Insight gained from using animal models to study pain in Parkinson's disease. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2024; 174:99-118. [PMID: 38341233 DOI: 10.1016/bs.irn.2023.08.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2024]
Abstract
Pain is one of the key non-motor symptoms experienced by a large proportion of people living with Parkinson's disease (PD), yet the mechanisms behind this pain remain elusive and as such its treatment remains suboptimal. It is hoped that through the study of animal models of PD, we can start to unravel some of the contributory mechanisms, and perhaps identify models that prove useful as test beds for assessing the efficacy of potential new analgesics. However, just how far along this journey are we right now? Is it even possible to model pain in PD in animal models of the disease? And have we gathered any insight into pain mechanisms from the use of animal models of PD so far? In this chapter we intend to address these questions and in particular highlight the findings generated by others, and our own group, following studies in a range of rodent models of PD.
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Affiliation(s)
- Yazead Buhidma
- King's College London, Institute of Psychiatry, Psychology & Neuroscience, Wolfson Sensory, Pain and Regeneration Centre, Guy's Campus, London, United Kingdom
| | - Joana Lama
- King's College London, Institute of Psychiatry, Psychology & Neuroscience, Wolfson Sensory, Pain and Regeneration Centre, Guy's Campus, London, United Kingdom
| | - Susan Duty
- King's College London, Institute of Psychiatry, Psychology & Neuroscience, Wolfson Sensory, Pain and Regeneration Centre, Guy's Campus, London, United Kingdom.
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da Silva MDV, Piva M, Martelossi-Cebinelli G, Stinglin Rosa Ribas M, Hoffmann Salles Bianchini B, K Heintz O, Casagrande R, Verri WA. Stem cells and pain. World J Stem Cells 2023; 15:1035-1062. [PMID: 38179216 PMCID: PMC10762525 DOI: 10.4252/wjsc.v15.i12.1035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 11/06/2023] [Accepted: 11/30/2023] [Indexed: 12/26/2023] Open
Abstract
Pain can be defined as an unpleasant sensory and emotional experience caused by either actual or potential tissue damage or even resemble that unpleasant experience. For years, science has sought to find treatment alternatives, with minimal side effects, to relieve pain. However, the currently available pharmacological options on the market show significant adverse events. Therefore, the search for a safer and highly efficient analgesic treatment has become a priority. Stem cells (SCs) are non-specialized cells with a high capacity for replication, self-renewal, and a wide range of differentiation possibilities. In this review, we provide evidence that the immune and neuromodulatory properties of SCs can be a valuable tool in the search for ideal treatment strategies for different types of pain. With the advantage of multiple administration routes and dosages, therapies based on SCs for pain relief have demonstrated meaningful results with few downsides. Nonetheless, there are still more questions than answers when it comes to the mechanisms and pathways of pain targeted by SCs. Thus, this is an evolving field that merits further investigation towards the development of SC-based analgesic therapies, and this review will approach all of these aspects.
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Affiliation(s)
- Matheus Deroco Veloso da Silva
- Department of Pathology, Laboratory of Pain, Inflammation, Neuropathy and Cancer, State University of Londrina, Londrina 86057-970, Paraná, Brazil
| | - Maiara Piva
- Department of Pathology, Laboratory of Pain, Inflammation, Neuropathy and Cancer, State University of Londrina, Londrina 86057-970, Paraná, Brazil
| | - Geovana Martelossi-Cebinelli
- Department of Pathology, Laboratory of Pain, Inflammation, Neuropathy and Cancer, State University of Londrina, Londrina 86057-970, Paraná, Brazil
| | - Mariana Stinglin Rosa Ribas
- Department of Pathology, Laboratory of Pain, Inflammation, Neuropathy and Cancer, State University of Londrina, Londrina 86057-970, Paraná, Brazil
| | - Beatriz Hoffmann Salles Bianchini
- Department of Pathology, Laboratory of Pain, Inflammation, Neuropathy and Cancer, State University of Londrina, Londrina 86057-970, Paraná, Brazil
| | - Olivia K Heintz
- Morningside Graduate School of Biomedical Sciences, University of Massachusetts Chan Medical School, Worcester, MA 01655, United States
| | - Rubia Casagrande
- Department of Pharmaceutical Sciences, Center of Health Science, State University of Londrina, Londrina 86038-440, Paraná, Brazil
| | - Waldiceu A Verri
- Department of Pathology, Laboratory of Pain, Inflammation, Neuropathy and Cancer, Center of Biological Sciences, State University of Londrina, Londrina 86057-970, Paraná, Brazil.
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Singh O, Carvalho DZ, Espay AJ, Benarroch EE, Grewal SS, Pagani-Estévez GL. Spinal cord stimulation for gait impairment in Parkinson Disease: scoping review and mechanistic considerations. PAIN MEDICINE (MALDEN, MASS.) 2023; 24:S11-S17. [PMID: 37833048 DOI: 10.1093/pm/pnad092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 05/20/2023] [Accepted: 06/27/2023] [Indexed: 10/15/2023]
Abstract
OBJECTIVE Advanced Parkinson's Disease (PD) is associated with Parkinson's Disease gait impairment (PDg), which increases the risk for falls and is often treatment-refractory. Subthalamic nucleus (STN) and globus pallidus pars interna (GPi) deep brain stimulation (DBS) often fails to improve axial symptoms like PDg. Spinal cord stimulation (SCS) has been suggested to improve PDg. SCS may benefit PDg by disrupting pathologic beta-oscillations and hypersynchrony in cortico-striatal-thalamic circuits to override excessive inhibition of brainstem locomotor regions. SCS may potentially improve locomotion by acting at any of these levels, either alone or in combination. METHODS We conducted a comprehensive literature search and scoping review, identifying 106 patients in whom SCS was evaluated for PDg. RESULTS Among the identified patients, 63% carried a pain diagnosis. Overall, the most common stimulation location was thoracic (78%), most commonly T9-T10. Burst (sub-perception) was the most common stimulation modality (59%). Prior treatment with DBS was used in 25%. Motor outcomes were assessed by the Unified Parkinson Disease Rating Scale (UPDRS) III-motor, UPDRS, the Timed Up and Go (TUG), and/or 10-/20-meter walking tests.Among these patients, 95 (90%) had PDg amelioration and improved motor outcomes. CONCLUSIONS Despite small sample sizes, patient heterogeneity, and unblinded evaluations complicating interpretations of efficacy and safety, SCS may be beneficial for at least a subset of PDg. Further research is required to clarify the role of SCS for PDg and the patients most suitable to benefit from this intervention.
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Affiliation(s)
- Omesh Singh
- Department of Physical Medicine and Rehabilitation, University of Cincinnati Medical Center, Cincinnati, OH 45219, United States
| | - Diego Z Carvalho
- Department of Neurology, Mayo Clinic, Rochester, MN 55905, United States
- Center for Sleep Medicine, Pulmonary and Critical Care Medicine Division, Department of Internal Medicine, Mayo Clinic, Rochester, MN 55905, United States
| | - Alberto J Espay
- James J and Joan A Gardner Center for Parkinson Disease and Movement Disorders, University of Cincinnati Medical Center, Cincinnati, OH 45219, United States
| | | | - Sanjeet S Grewal
- Department of Neurosurgery, Mayo Clinic, Jacksonville, FL 32224, United States
| | - Gabriel L Pagani-Estévez
- Interventional and Surgical Pain Management, Cincinnati Veterans Affairs Medical Center, Cincinnati, OH 45219, United States
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Zhang ZJ, Shao HY, Liu C, Song HL, Wu XB, Cao DL, Zhu M, Fu YY, Wang J, Gao YJ. Descending dopaminergic pathway facilitates itch signal processing via activating spinal GRPR + neurons. EMBO Rep 2023; 24:e56098. [PMID: 37522391 PMCID: PMC10561366 DOI: 10.15252/embr.202256098] [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: 09/06/2022] [Revised: 07/10/2023] [Accepted: 07/14/2023] [Indexed: 08/01/2023] Open
Abstract
A11 dopaminergic neurons regulate somatosensory transduction by projecting from the diencephalon to the spinal cord, but the function of this descending projection in itch remained elusive. Here, we report that dopaminergic projection neurons from the A11 nucleus to the spinal dorsal horn (dopaminergicA11-SDH ) are activated by pruritogens. Inhibition of these neurons alleviates itch-induced scratching behaviors. Furthermore, chemogenetic inhibition of spinal dopamine receptor D1-expressing (DRD1+ ) neurons decreases acute or chronic itch-induced scratching. Mechanistically, spinal DRD1+ neurons are excitatory and mostly co-localize with gastrin-releasing peptide (GRP), an endogenous neuropeptide for itch. In addition, DRD1+ neurons form synapses with GRP receptor-expressing (GRPR+ ) neurons and activate these neurons via AMPA receptor (AMPAR). Finally, spontaneous itch and enhanced acute itch induced by activating spinal DRD1+ neurons are relieved by antagonists against AMPAR and GRPR. Thus, the descending dopaminergic pathway facilitates spinal itch transmission via activating DRD1+ neurons and releasing glutamate and GRP, which directly augments GRPR signaling. Interruption of this descending pathway may be used to treat chronic itch.
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Affiliation(s)
- Zhi-Jun Zhang
- Institute of Pain Medicine and Special Environmental Medicine, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China
- Department of Human Anatomy, School of Medicine, Nantong University, Jiangsu, China
| | - Han-Yu Shao
- Department of Human Anatomy, School of Medicine, Nantong University, Jiangsu, China
| | - Chuan Liu
- Department of Human Anatomy, School of Medicine, Nantong University, Jiangsu, China
| | - Hao-Lin Song
- Department of Human Anatomy, School of Medicine, Nantong University, Jiangsu, China
| | - Xiao-Bo Wu
- Institute of Pain Medicine and Special Environmental Medicine, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China
| | - De-Li Cao
- Institute of Pain Medicine and Special Environmental Medicine, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China
| | - Meixuan Zhu
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Yuan-Yuan Fu
- Institute of Pain Medicine and Special Environmental Medicine, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China
| | - Juan Wang
- Department of Human Anatomy, School of Medicine, Nantong University, Jiangsu, China
| | - Yong-Jing Gao
- Institute of Pain Medicine and Special Environmental Medicine, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China
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10
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Wang J, Li Z, Tu Y, Gao F. The Dopaminergic System in the Ventral Tegmental Area Contributes to Morphine Analgesia and Tolerance. Neuroscience 2023; 527:74-83. [PMID: 37286162 DOI: 10.1016/j.neuroscience.2023.05.026] [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: 09/26/2022] [Revised: 05/17/2023] [Accepted: 05/27/2023] [Indexed: 06/09/2023]
Abstract
Morphine has a strong analgesic effect and is suitable for various types of pain, so it is widely used. But long-term usage of morphine can lead to drug tolerance, which limits its clinical application. The complex mechanisms underlying the development of morphine analgesia into tolerance involve multiple nuclei in the brain. Recent studies reveal the signaling at the cellular and molecular levels as well as neural circuits contributing to morphine analgesia and tolerance in the ventral tegmental area (VTA), which is traditionally considered a critical center of opioid reward and addiction. Existing studies show that dopamine receptors and μ-opioid receptors participate in morphine tolerance through the altered activities of dopaminergic and/or non-dopaminergic neurons in the VTA. Several neural circuits related to the VTA are also involved in the regulation of morphine analgesia and the development of drug tolerance. Reviewing specific cellular and molecular targets and related neural circuits may provide novel precautionary strategies for morphine tolerance.
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Affiliation(s)
- Jihong Wang
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zheng Li
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ye Tu
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Feng Gao
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Singh A, Smith PF, Zheng Y. Targeting the Limbic System: Insights into Its Involvement in Tinnitus. Int J Mol Sci 2023; 24:9889. [PMID: 37373034 DOI: 10.3390/ijms24129889] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/05/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Tinnitus is originally derived from the Latin verb tinnire, which means "to ring". Tinnitus, a complex disorder, is a result of sentient cognizance of a sound in the absence of an external auditory stimulus. It is reported in children, adults, and older populations. Patients suffering from tinnitus often present with hearing loss, anxiety, depression, and sleep disruption in addition to a hissing and ringing in the ear. Surgical interventions and many other forms of treatment have been only partially effective due to heterogeneity in tinnitus patients and a lack of understanding of the mechanisms of tinnitus. Although researchers across the globe have made significant progress in understanding the underlying mechanisms of tinnitus over the past few decades, tinnitus is still deemed to be a scientific enigma. This review summarises the role of the limbic system in tinnitus development and provides insight into the development of potential target-specific tinnitus therapies.
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Affiliation(s)
- Anurag Singh
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand
- Brain Health Research Centre, University of Otago, Dunedin 9016, New Zealand
- The Eisdell Moore Centre for Research in Hearing and Balance Disorders, University of Auckland, Auckland 1023, New Zealand
| | - Paul F Smith
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand
- Brain Health Research Centre, University of Otago, Dunedin 9016, New Zealand
- The Eisdell Moore Centre for Research in Hearing and Balance Disorders, University of Auckland, Auckland 1023, New Zealand
| | - Yiwen Zheng
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand
- Brain Health Research Centre, University of Otago, Dunedin 9016, New Zealand
- The Eisdell Moore Centre for Research in Hearing and Balance Disorders, University of Auckland, Auckland 1023, New Zealand
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12
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Abd Elmaaboud MA, Awad MM, El-Shaer RAA, Kabel AM. The immunomodulatory effects of ethosuximide and sodium butyrate on experimentally induced fibromyalgia: The interaction between IL-4, synaptophysin, and TGF-β1/NF-κB signaling. Int Immunopharmacol 2023; 118:110061. [PMID: 36989891 DOI: 10.1016/j.intimp.2023.110061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/01/2023] [Accepted: 03/18/2023] [Indexed: 03/29/2023]
Abstract
BACKGROUND AND AIMS Fibromyalgia is a widespread chronic pain syndrome associated with several comorbid conditions that affect the quality of patients' life. Its pathogenesis is complex, and the treatment strategies are limited by partial efficacy and potential adverse effects. So, our aim was to investigate the possible ameliorative effects of ethosuximide and sodium butyrate on fibromyalgia and compare their effects to pregabalin. MATERIALS AND METHODS In a mouse model of reserpine induced fibromyalgia, the effect of ethosuximide, sodium butyrate, and pregabalin was investigated. Evaluation of mechanical allodynia, cold hypersensitivity, anxiety, cognitive impairment, and depression was performed. Also, the brain and spinal cord tissue serotonin, dopamine and glutamate in addition to the serum levels of interleukin (IL)-4 and transforming growth factor beta 1 (TGF-β1) were assayed. Moreover, the expression of nuclear factor kappa B (NF-κB) synaptophysin was immunoassayed in the hippocampal tissues. KEY FINDINGS Ethosuximide and sodium butyrate restored the behavioral tests to the normal values except for the antidepressant effect which was evident only with ethosuximide. Both drugs elevated the levels of the anti-inflammatory cytokines IL-4 and TGF-β1, reduced the hippocampal NF-κB, and increased synaptophysin expression with superiority of sodium butyrate. Ethosuximide reduced only spinal cord and brain glutamate while improved brain dopamine while sodium butyrate elevated spinal cord dopamine and serotonin with no effect on glutamate. Also, sodium butyrate elevated brain serotonin and reduced glutamate with no effect on brain dopamine. SIGNIFICANCE Each of sodium butyrate and ethosuximide would serve as a promising therapeutic modality for management of fibromyalgia and its comorbid conditions.
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Affiliation(s)
| | - Marwa M Awad
- Department of physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Rehab A A El-Shaer
- Department of physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Ahmed M Kabel
- Department of pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt.
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13
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Nickols JER, Dursun SM, Taylor AMW. Preclinical evidence for the use of the atypical antipsychotic, brexpiprazole, for opioid use disorder. Neuropharmacology 2023; 233:109546. [PMID: 37068603 DOI: 10.1016/j.neuropharm.2023.109546] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/24/2023] [Accepted: 04/12/2023] [Indexed: 04/19/2023]
Abstract
Opioid addiction is characterized by adaptations in the mesolimbic dopamine system that occur during chronic opioid use. Alterations in dopaminergic transmission contribute to pathological drug-seeking behavior and other symptoms associated with opioid withdrawal following drug discontinuation, making drug abstinence challenging and contributing to high rates of relapse among those suffering from substance use disorder. Recently, the use of dopamine partial agonists has been proposed as a potential strategy to restore dopaminergic signalling during drug withdrawal, while avoiding the adverse side effects associated with stronger modulators of dopaminergic transmission. We investigated the effects of the atypical antipsychotic brexpiprazole, which is a partial agonist at dopamine D2 and D3 receptors, in a mouse model of opioid dependence. The development of opioid dependence in mice is characterized by locomotor sensitization, analgesic tolerance, opioid-induced hyperalgesia, and drug-seeking behavior. We set up four paradigms to model the effects of brexpiprazole on each of these adaptations that occur during chronic opioid use in male and female C57BL/6J mice. Concomitant treatment of brexpiprazole during chronic morphine administration attenuated the development of locomotor sensitization. Brexpiprazole treatment abolished morphine place preference and blocked reinstatement of this behavior following extinction. Brexpiprazole treatment did not alter morphine analgesia, nor did it impact the development of morphine tolerance. However, brexpiprazole treatment did prevent the expression of opioid-induced hyperalgesia in a tail-withdrawal assay, while failing to improve somatic withdrawal symptoms. Altogether, these results provide preclinical evidence for the efficacy of brexpiprazole as a modulator of dopamine-dependent behaviors during opioid use and withdrawal.
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Affiliation(s)
| | - Serdar M Dursun
- Department of Psychiatry, University of Alberta, Edmonton, Canada; Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada
| | - Anna M W Taylor
- Department of Pharmacology, University of Alberta, Edmonton, Canada; Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada; Department of Anesthesiology and Pain Medicine, University of Alberta, Edmonton, Canada.
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14
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Esancy K, Conceicao LL, Curtright A, Tran T, Condon L, Lecamp B, Dhaka A. A novel small molecule, AS1, reverses the negative hedonic valence of noxious stimuli. BMC Biol 2023; 21:69. [PMID: 37013580 PMCID: PMC10071644 DOI: 10.1186/s12915-023-01573-7] [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: 10/03/2022] [Accepted: 03/17/2023] [Indexed: 04/05/2023] Open
Abstract
BACKGROUND Pain is the primary reason people seek medical care, with chronic pain affecting ~ 20% of people in the USA. However, many existing analgesics are ineffective in treating chronic pain, while others (e.g., opioids) have undesirable side effects. Here, we describe the screening of a small molecule library using a thermal place aversion assay in larval zebrafish to identify compounds that alter aversion to noxious thermal stimuli and could thus serve as potential analgesics. RESULTS From our behavioral screen, we discovered a small molecule, Analgesic Screen 1 (AS1), which surprisingly elicited attraction to noxious painful heat. When we further explored the effects of this compound using other behavioral place preference assays, we found that AS1 was similarly able to reverse the negative hedonic valence of other painful (chemical) and non-painful (dark) aversive stimuli without being inherently rewarding. Interestingly, targeting molecular pathways canonically associated with analgesia did not replicate the effects of AS1. A neuronal imaging assay revealed that clusters of dopaminergic neurons, as well as forebrain regions located in the teleost equivalent of the basal ganglia, were highly upregulated in the specific context of AS1 and aversive heat. Through a combination of behavioral assays and pharmacological manipulation of dopamine circuitry, we determined that AS1 acts via D1 dopamine receptor pathways to elicit this attraction to noxious stimuli. CONCLUSIONS Together, our results suggest that AS1 relieves an aversion-imposed "brake" on dopamine release, and that this unique mechanism may provide valuable insight into the development of new valence-targeting analgesic drugs, as well as medications for other valence-related neurological conditions, such as anxiety and post-traumatic stress disorder (PTSD).
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Affiliation(s)
- Kali Esancy
- Department of Biological Structure, University of Washington, Seattle, USA
| | - Lais L Conceicao
- Department of Biological Structure, University of Washington, Seattle, USA
| | - Andrew Curtright
- Department of Biological Structure, University of Washington, Seattle, USA
| | - Thanh Tran
- Department of Biological Structure, University of Washington, Seattle, USA
| | - Logan Condon
- Department of Biological Structure, University of Washington, Seattle, USA
| | - Bryce Lecamp
- Department of Biological Structure, University of Washington, Seattle, USA
| | - Ajay Dhaka
- Department of Biological Structure, University of Washington, Seattle, USA.
- Graduate Program in Neuroscience, University of Washington, Seattle, USA.
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15
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Yang Q, Jiang M, Xu S, Yang L, Yang P, Song Y, Zhu H, Wang Y, Sun Y, Yan C, Yuan Z, Liu X, Bai Z. Mirror image pain mediated by D2 receptor regulation of astrocytic Cx43 phosphorylation and channel opening. Biochim Biophys Acta Mol Basis Dis 2023; 1869:166657. [PMID: 36716897 DOI: 10.1016/j.bbadis.2023.166657] [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: 09/26/2022] [Revised: 12/21/2022] [Accepted: 01/20/2023] [Indexed: 01/29/2023]
Abstract
Mirror image pain (MIP), a clinical syndrome of contralateral pain hypersensitivity caused by unilateral injury, has been identified in various neuropathological conditions. Gap junctional protein Connexin 43 (Cx43), its phosphorylation levels and dopamine D2 receptor (DRD2) play key integrating roles in pain processing. We presume D2DR activity may affect Cx43 hemichannel opening via Cx43 phosphorylation levels to regulate MIP. This study shows that spinal astrocytic Cx43 directly interacts with DRD2 to mediate MIP. DRD2 and Cx43 expression levels were asymmetrically elevated in bilateral spinal during MIP, and DRD2 modulated the opening of primary astrocytic Cx43 hemichannels. Furthermore, Cx43 phosphorylation at Ser373 was increased during MIP, but decreased in DRD2 knockout (KO) mice. Finally, activation of spinal protein kinase A (PKA) altered the expression of Cx43 and its phosphorylation bilaterally, thus reversing the analgesic effect in DRD2 KO mice. Together, these data reveal that spinal Cx43 phosphorylation and channel opening are regulated by DRD2 via PKA activation, and that spinal Cx43 and DRD2 are key molecular sensors mediating mirror image pain.
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Affiliation(s)
- Qinghu Yang
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China; Yanan Engineering & Technological Research Centre for Resource Peptide Drugs, Yanan 716000, China; Yanan Key Laboratory for Neural Immuno-Tumor and Stem Cell, Yanan 716000, China
| | - Ming Jiang
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China; Yanan Engineering & Technological Research Centre for Resource Peptide Drugs, Yanan 716000, China; Yanan Key Laboratory for Neural Immuno-Tumor and Stem Cell, Yanan 716000, China
| | - Sen Xu
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China
| | - Liang Yang
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China; Yanan Engineering & Technological Research Centre for Resource Peptide Drugs, Yanan 716000, China; Yanan Key Laboratory for Neural Immuno-Tumor and Stem Cell, Yanan 716000, China
| | - Pan Yang
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China
| | - Yutian Song
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China
| | - Hongni Zhu
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China
| | - Yu Wang
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China
| | - Yahan Sun
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China
| | - Chengxiang Yan
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China
| | - Zhaoyue Yuan
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China
| | - Xia Liu
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China; Yanan Engineering & Technological Research Centre for Resource Peptide Drugs, Yanan 716000, China; Yanan Key Laboratory for Neural Immuno-Tumor and Stem Cell, Yanan 716000, China.
| | - Zhantao Bai
- School of Life Science & Research Center for Natural Peptide Drugs, Shaanxi Engineering & Technological Research Centre for Conservation & Utilization of Regional Biological Resources, Yanan University, Yanan 716000, China; Yanan Engineering & Technological Research Centre for Resource Peptide Drugs, Yanan 716000, China; Yanan Key Laboratory for Neural Immuno-Tumor and Stem Cell, Yanan 716000, China.
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16
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Patel S. Cardiovascular Drug Administration Errors During Neuraxial Anesthesia or Analgesia-A Narrative Review. J Cardiothorac Vasc Anesth 2023; 37:291-298. [PMID: 36443173 DOI: 10.1053/j.jvca.2022.10.016] [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: 09/12/2022] [Revised: 10/13/2022] [Accepted: 10/19/2022] [Indexed: 11/07/2022]
Abstract
The prevalence and harm associated with inadvertent neuraxial cardiovascular (CV) medication administration errors are unknown. This review aims to analyze neuraxial CV drug administration errors and associated clinical consequences. The secondary objective is to identify the causes and contributory factors in order to prevent future incidents. The author reviewed reports of accidental administration of CV medications via neuraxial routes during spinal or epidural anesthesia or analgesia published in the last 5 decades (1972-2022). Twenty-seven publications reported neuraxial administration of 10 different CV drugs among patients aged 1 to 81. Seventeen of the 33 errors occurred via the epidural route. Digoxin (9 patients), ephedrine (6), metaraminol (4), labetalol (4), and dopamine (3) were frequently involved in the incidents. Intrathecal digoxin (8 patients) was associated with paraplegia and encephalopathy, of whom 4 pregnant women scheduled for elective cesarean delivery sustained permanent lower limb neurologic deficits. Reversible systemic hemodynamic changes were predominant following the administration of epidural inotropes (dobutamine, dopamine, and epinephrine) and vasopressors (ephedrine and metaraminol). Most administrations (30 out of 32) were only bolus injections. All were preventable skill-based errors. The human factor analysis classification system (HFACS) identified poor organizational climate, inadequate supervision of junior doctors, deficiencies in neuraxial task processes, and incorrect visual perception of objects. The HFACS suggests CV medication safety strategies should include better education and training of junior doctors, modifications in neuraxial anesthesia practices, and careful handling of the CV drug ampoules and syringes.
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Affiliation(s)
- Santosh Patel
- Department of Anaesthesia, Tawam Hospital, Al Ain, Abu Dhabi, United Arab Emirates.
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17
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Salberg S, Doshen A, Yamakawa GR, Miller JV, Noel M, Henderson L, Mychasiuk R. The waiting game: investigating the neurobiological transition from acute to persistent pain in adolescent rats. Cereb Cortex 2023; 33:6382-6393. [PMID: 36610738 PMCID: PMC10183733 DOI: 10.1093/cercor/bhac511] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 01/09/2023] Open
Abstract
Persistent postsurgical pain affects 20% of youth undergoing a surgical procedure, with females exhibiting increased prevalence of chronic pain compared with males. This study sought to examine the sexually-dimorphic neurobiological changes underlying the transition from acute to persistent pain following surgery in adolescence. Male and female Sprague Dawley rats were randomly allocated to a sham or injury (plantar-incision surgery) condition and assessed for pain sensitivity while also undergoing magnetic resonance imaging at both an acute and chronic timepoint within adolescence. We found that injury resulted in persistent pain in both sexes, with females displaying most significant sensitivity. Injury resulted in significant gray matter density increases in brain areas including the cerebellum, caudate putamen/insula, and amygdala and decreases in the hippocampus, hypothalamus, nucleus accumbens, and lateral septal nucleus. Gray matter density changes in the hippocampus and lateral septal nucleus were driven by male rats whereas changes in the amygdala and caudate putamen/insula were driven by female rats. Overall, our results indicate persistent behavioral and neurobiological changes following surgery in adolescence, with sexually-dimorphic and age-specific outcomes, highlighting the importance of studying both sexes and adolescents, rather than extrapolating from male adult literature.
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Affiliation(s)
- Sabrina Salberg
- Department of Neuroscience, Monash University, 99 Commercial Road, Melbourne, VIC, 3004, Australia
| | - Angela Doshen
- School of Medical Sciences (Neuroscience), Brain and Mind Centre, University of Sydney, 94 Mallett St, Camperdown, NSW, 2050, Australia
| | - Glenn R Yamakawa
- Department of Neuroscience, Monash University, 99 Commercial Road, Melbourne, VIC, 3004, Australia
| | - Jillian Vinall Miller
- Department of Anesthesiology, Perioperative & Pain Medicine, Cumming School of Medicine, University of Calgary, 29 Street NW, Calgary, AB, T2N 2T9, Canada
| | - Melanie Noel
- Department of Psychology, Alberta Children's Hospital Research Institute, Hotchkiss Brain Institute, The University of Calgary, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Luke Henderson
- School of Medical Sciences (Neuroscience), Brain and Mind Centre, University of Sydney, 94 Mallett St, Camperdown, NSW, 2050, Australia
| | - Richelle Mychasiuk
- Department of Neuroscience, Monash University, 99 Commercial Road, Melbourne, VIC, 3004, Australia
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18
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Abanoz Y, Gülen Abanoz Y, Gündüz A, Karadeniz D, Erdemir Kızıltan M. Long latency trigemino-cervical reflex in restless legs syndrome. Int J Neurosci 2022:1-7. [PMID: 36533413 DOI: 10.1080/00207454.2022.2158826] [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: 01/31/2022] [Revised: 10/27/2022] [Accepted: 12/10/2022] [Indexed: 12/23/2022]
Abstract
OBJECTIVE The trigemino-cervical complex (TCC) seems under dopaminergic inhibitory control and the abnormalities of trigemino-cervical reflex (TCR) have been reported in disorders associated with the dopaminergic system and various pain disorders. If the inhibitory response in TCC is likely dopaminergic, we hypothesized that TCR, which has never been evaluated in restless legs syndrome (RLS) patients before, would be also abnormal. METHODS TCR was recorded from bilateral sternocleidomastoid and splenius capitis muscles in consecutive 15 drug-naive RLS patients and 16 age- and sex-matched healthy subjects. The right and left infraorbital branches of the trigeminal nerve were stimulated by percutaneous electrical stimulation separately. The presence rates, onset latencies, amplitudes, and durations of responses were measured and compared between patients with RLS and controls. RESULTS The presence rates, onset latencies and amplitudes of TCR responses were similar between RLS patients and controls, however, the durations of responses were bilaterally longer in RLS patients compared to healthy volunteers. CONCLUSIONS Hyperexcitability of TCR suggests defective sensory processing in the brainstem probably due to impairment of descending inhibitory dopaminergic system in RLS. The sensitization of TCC in RLS patients may also be a possible factor that might explain the association of RLS and pain disorders.
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Affiliation(s)
- Yasin Abanoz
- Department of Electroneurophysiology, Advanced Vocational School, Doğuş University, Istanbul, Turkey
| | - Yeşim Gülen Abanoz
- Department of Electroneurophysiology, Advanced Vocational School, Doğuş University, Istanbul, Turkey
| | - Ayşegül Gündüz
- Department of Neurology, School of Medicine, İstanbul University-Cerrahpaşa, Istanbul, Turkey
| | - Derya Karadeniz
- Department of Neurology, School of Medicine, İstanbul University-Cerrahpaşa, Istanbul, Turkey
| | - Meral Erdemir Kızıltan
- Department of Neurology, School of Medicine, İstanbul University-Cerrahpaşa, Istanbul, Turkey
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19
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Piña-Leyva C, Lara-Lozano M, Rodríguez-Sánchez M, Vidal-Cantú GC, Barrientos Zavalza E, Jiménez-Estrada I, Delgado-Lezama R, Rodríguez-Sosa L, Granados-Soto V, González-Barrios JA, Florán-Garduño B. Hypothalamic A11 Nuclei Regulate the Circadian Rhythm of Spinal Mechanonociception through Dopamine Receptors and Clock Gene Expression. Life (Basel) 2022; 12:life12091411. [PMID: 36143447 PMCID: PMC9506518 DOI: 10.3390/life12091411] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/05/2022] [Accepted: 09/07/2022] [Indexed: 11/26/2022] Open
Abstract
Several types of sensory perception have circadian rhythms. The spinal cord can be considered a center for controlling circadian rhythms by changing clock gene expression. However, to date, it is not known if mechanonociception itself has a circadian rhythm. The hypothalamic A11 area represents the primary source of dopamine (DA) in the spinal cord and has been found to be involved in clock gene expression and circadian rhythmicity. Here, we investigate if the paw withdrawal threshold (PWT) has a circadian rhythm, as well as the role of the dopaminergic A11 nucleus, DA, and DA receptors (DR) in the PWT circadian rhythm and if they modify clock gene expression in the lumbar spinal cord. Naïve rats showed a circadian rhythm of the PWT of almost 24 h, beginning during the night–day interphase and peaking at 14.63 h. Similarly, DA and DOPAC’s spinal contents increased at dusk and reached their maximum contents at noon. The injection of 6-hydroxydopamine (6-OHDA) into the A11 nucleus completely abolished the circadian rhythm of the PWT, reduced DA tissue content in the lumbar spinal cord, and induced tactile allodynia. Likewise, the repeated intrathecal administration of D1-like and D2-like DA receptor antagonists blunted the circadian rhythm of PWT. 6-OHDA reduced the expression of Clock and Per1 and increased Per2 gene expression during the day. In contrast, 6-OHDA diminished Clock, Bmal, Per1, Per2, Per3, Cry1, and Cry2 at night. The repeated intrathecal administration of the D1-like antagonist (SCH-23390) reduced clock genes throughout the day (Clock and Per2) and throughout the night (Clock, Per2 and Cry1), whereas it increased Bmal and Per1 throughout the day. In contrast, the intrathecal injection of the D2 receptor antagonists (L-741,626) increased the clock genes Bmal, Per2, and Per3 and decreased Per1 throughout the day. This study provides evidence that the circadian rhythm of the PWT results from the descending dopaminergic modulation of spinal clock genes induced by the differential activation of spinal DR.
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Affiliation(s)
- Celia Piña-Leyva
- · Department of Physiology, Biophysics, and Neurosciences, CINVESTAV, Av. No. 2508 National Polytechnic Institute, Mexico City 06760, Mexico
| | - Manuel Lara-Lozano
- · Department of Physiology, Biophysics, and Neurosciences, CINVESTAV, Av. No. 2508 National Polytechnic Institute, Mexico City 06760, Mexico
- Genomic Medicine Laboratory, Regional Hospital “October 1st”, ISSSTE, Av. No. 1669 National Polytechnic Institute, Mexico City 07760, Mexico
| | - Marina Rodríguez-Sánchez
- · Department of Physiology, Biophysics, and Neurosciences, CINVESTAV, Av. No. 2508 National Polytechnic Institute, Mexico City 06760, Mexico
| | - Guadalupe C. Vidal-Cantú
- Neurobiology of Pain Laboratory, Departamento de Farmacología, Cinvestav, Sede Sur, México City 14330, Mexico
| | - Ericka Barrientos Zavalza
- Doctorado en Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana, Unidad Iztapalapa, Mexico City 09340, Mexico
| | - Ismael Jiménez-Estrada
- · Department of Physiology, Biophysics, and Neurosciences, CINVESTAV, Av. No. 2508 National Polytechnic Institute, Mexico City 06760, Mexico
| | - Rodolfo Delgado-Lezama
- · Department of Physiology, Biophysics, and Neurosciences, CINVESTAV, Av. No. 2508 National Polytechnic Institute, Mexico City 06760, Mexico
| | - Leonardo Rodríguez-Sosa
- Department of Physiology, Medicine Faculty, National Autonomous University of Mexico, University City, Mexico City 04510, Mexico
| | - Vinicio Granados-Soto
- Neurobiology of Pain Laboratory, Departamento de Farmacología, Cinvestav, Sede Sur, México City 14330, Mexico
| | - Juan Antonio González-Barrios
- Genomic Medicine Laboratory, Regional Hospital “October 1st”, ISSSTE, Av. No. 1669 National Polytechnic Institute, Mexico City 07760, Mexico
- Correspondence: (J.A.G.-B.); (B.F.-G.); Tel.: +52-55-81077971 (J.A.G.-B.); +52-55-13848283 (B.F.-G.)
| | - Benjamín Florán-Garduño
- · Department of Physiology, Biophysics, and Neurosciences, CINVESTAV, Av. No. 2508 National Polytechnic Institute, Mexico City 06760, Mexico
- Correspondence: (J.A.G.-B.); (B.F.-G.); Tel.: +52-55-81077971 (J.A.G.-B.); +52-55-13848283 (B.F.-G.)
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20
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Szlaga A, Sambak P, Gugula A, Trenk A, Gundlach AL, Blasiak A. Catecholaminergic innervation and D2-like dopamine receptor-mediated modulation of brainstem nucleus incertus neurons in the rat. Neuropharmacology 2022; 218:109216. [PMID: 35973599 DOI: 10.1016/j.neuropharm.2022.109216] [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: 05/10/2022] [Revised: 08/01/2022] [Accepted: 08/08/2022] [Indexed: 11/19/2022]
Abstract
Nucleus incertus (NI) is a brainstem structure involved in the control of arousal, stress responses and locomotor activity. It was reported recently that NI neurons express the dopamine type 2 (D2) receptor that belongs to the D2-like receptor (D2R) family, and that D2R activation in the NI decreased locomotor activity. In this study, using multiplex in situ hybridization, we observed that GABAergic and glutamatergic NI neurons express D2 receptor mRNA, and that D2 receptor mRNA-positive neurons belong to partially overlapping relaxin-3- and cholecystokinin-positive NI neuronal populations. Our immunohistochemical and viral-based retrograde tract-tracing studies revealed a dense innervation of the NI area by fibers containing the catecholaminergic biosynthesis enzymes, tyrosine hydroxylase (TH) and dopamine β-hydroxylase (DBH), and indicated the major sources of the catecholaminergic innervation of the NI as the Darkschewitsch, raphe and hypothalamic A13 nuclei. Furthermore, using whole-cell patch clamp recordings, we demonstrated that D2R activation by quinpirole produced excitatory and inhibitory influences on neuronal activity in the NI, and that both effects were postsynaptic in nature. Moreover, the observed effects were cell-type specific, as type I NI neurons were either excited or inhibited, whereas type II NI neurons were mainly excited by D2R activation. Our results reveal that rat NI receives a strong catecholaminergic innervation and suggest that catecholamines acting within the NI are involved in the control of diverse processes, including locomotor activity, social interaction and nociceptive signaling. Our data also strengthen the hypothesis that the NI acts as a hub integrating arousal-related neuronal information.
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Affiliation(s)
- Agata Szlaga
- Department of Neurophysiology and Chronobiology, Jagiellonian University, Krakow, Poland
| | - Patryk Sambak
- Department of Neurophysiology and Chronobiology, Jagiellonian University, Krakow, Poland
| | - Anna Gugula
- Department of Neurophysiology and Chronobiology, Jagiellonian University, Krakow, Poland
| | - Aleksandra Trenk
- Department of Neurophysiology and Chronobiology, Jagiellonian University, Krakow, Poland
| | - Andrew L Gundlach
- The Florey Institute of Neuroscience and Mental Health, Florey Department of Neuroscience and Mental Health and Department of Anatomy and Physiology, The University of Melbourne, Victoria, Australia
| | - Anna Blasiak
- Department of Neurophysiology and Chronobiology, Jagiellonian University, Krakow, Poland.
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21
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Park SE, Neupane C, Noh C, Sharma R, Shin HJ, Pham TL, Lee GS, Park KD, Lee CJ, Kang DW, Lee SY, Kim HW, Park JB. Antiallodynic effects of KDS2010, a novel MAO-B inhibitor, via ROS-GABA inhibitory transmission in a paclitaxel-induced tactile hypersensitivity model. Mol Brain 2022; 15:41. [PMID: 35526002 PMCID: PMC9078011 DOI: 10.1186/s13041-022-00924-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 04/18/2022] [Indexed: 11/10/2022] Open
Abstract
Monoamine oxidase (MAO) inhibitors have been investigated for the treatment of neuropathic pain. Here, we assessed the antiallodynic effects of a novel MAO-B inhibitor, KDS2010, on paclitaxel (PTX)-induced mechanical hypersensitivity. Oral administration of KDS2010 effectively relieved PTX-induced mechanical hypersensitivity in a dose-dependent manner. KDS2010 (25 mg/Kg) significantly prevented and suppressed PTX-induced pain responses with minimal effects on the body weight, motor activity, and working memory. KDS2010 significantly reduced reactive astrocytosis and reactive oxygen species (ROS) level in the L4–L6 spinal cord of PTX-treated mice. Furthermore, KDS2010 reversed the attenuation of GABAergic spontaneous inhibitory postsynaptic current (sIPSC) frequency in spinal dorsal horn neurons, although it failed to restore the reduced tonic GABAA inhibition nor the increased GABA transporter 1 (GAT1) expression in PTX-treated mice. In addition, bath application of a reactive oxygen species (ROS) scavenger (PBN) restored the sIPSC frequency in PTX-treated mice but not in control and PTX + KDS2010-treated mice. These results indicated that the antiallodynic effect of KDS2010 is not due to a MAO-B-dependent GABA production. Finally, PBN alone also exerted a similar analgesic effect as KDS2010, but a co-treatment of PBN with KDS2010 showed no additive effect, suggesting that inhibition of MAO-B-dependent ROS production is responsible for the analgesic effect by KDS2010 on PTX-induced allodynia. Overall, KDS2010 attenuated PTX-induced pain behaviors by restoring the altered ROS level and GABAergic inhibitory signaling in the spinal cord, suggesting that KDS2010 is a promising therapeutic strategy for chemotherapy-induced peripheral neuropathy.
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Affiliation(s)
- Su Eun Park
- Department of Medical Sciences, Graduate School, Chungnam National University, Daejeon, 35015, Korea.,Department of Physiology, College of Medicine and Brain Research Institute, Chungnam National University, Daejeon, 35015, Korea
| | - Chiranjivi Neupane
- Department of Medical Sciences, Graduate School, Chungnam National University, Daejeon, 35015, Korea.,Department of Physiology, College of Medicine and Brain Research Institute, Chungnam National University, Daejeon, 35015, Korea.,Laboratory of Veterinary Pharmacology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, 08826, Korea
| | - Chan Noh
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, 35015, South Korea
| | - Ramesh Sharma
- Department of Medical Sciences, Graduate School, Chungnam National University, Daejeon, 35015, Korea.,Department of Physiology, College of Medicine and Brain Research Institute, Chungnam National University, Daejeon, 35015, Korea.,Laboratory of Veterinary Pharmacology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, 08826, Korea
| | - Hyun Jin Shin
- Department of Medical Sciences, Graduate School, Chungnam National University, Daejeon, 35015, Korea.,Department of Physiology, College of Medicine and Brain Research Institute, Chungnam National University, Daejeon, 35015, Korea
| | - Thuy Linh Pham
- Department of Medical Sciences, Graduate School, Chungnam National University, Daejeon, 35015, Korea.,Department of Physiology, College of Medicine and Brain Research Institute, Chungnam National University, Daejeon, 35015, Korea
| | - Gyu-Seung Lee
- Department of Medical Sciences, Graduate School, Chungnam National University, Daejeon, 35015, Korea.,Dong-Gu Health Promotion Center 301-01, 30 Bogeunso Avenue, Samseung-Dong, Dong-gu, Daejeon, South Korea
| | - Ki Duk Park
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, Korea
| | - C Justin Lee
- Center for Cognition and Sociality, Institute for Basic Science, Daejeon, 34126, Korea
| | - Dong-Wook Kang
- Department of Medical Sciences, Graduate School, Chungnam National University, Daejeon, 35015, Korea.,Department of Physiology, College of Medicine and Brain Research Institute, Chungnam National University, Daejeon, 35015, Korea
| | - So Yeong Lee
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, 08826, Korea
| | - Hyun-Woo Kim
- Department of Medical Sciences, Graduate School, Chungnam National University, Daejeon, 35015, Korea.,Department of Physiology, College of Medicine and Brain Research Institute, Chungnam National University, Daejeon, 35015, Korea
| | - Jin Bong Park
- Department of Medical Sciences, Graduate School, Chungnam National University, Daejeon, 35015, Korea. .,Department of Physiology, College of Medicine and Brain Research Institute, Chungnam National University, Daejeon, 35015, Korea. .,Laboratory of Veterinary Pharmacology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, 08826, Korea.
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22
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White KM, LaRowe LR, Powers JM, Paladino MB, Maisto SA, Zvolensky MJ, Glatt SJ, Ditre JW. Family History of Alcohol Use Disorder as a Predictor of Endogenous Pain Modulation Among Moderate to Heavy Drinkers. THE JOURNAL OF PAIN 2022; 23:864-875. [PMID: 34974175 PMCID: PMC9086107 DOI: 10.1016/j.jpain.2021.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 11/01/2021] [Accepted: 12/13/2021] [Indexed: 05/03/2023]
Abstract
Family history of alcohol use disorder (AUD) is frequently endorsed by persons with chronic pain. Although individuals with a family history of AUD have demonstrated enhanced sensitivity to painful stimulation, previous research has not examined endogenous pain modulation in this population. The goal of this study was to test family history of AUD as a predictor of conditioned pain modulation, offset analgesia, and temporal summation among a sample of moderate and heavy drinkers. Adults with no current pain (N = 235; 58.3% male; Mage = 34.3; 91.9% non-Hispanic; 60% white) were evaluated for family history of AUD at baseline and pain modulatory outcomes were assessed via quantitative sensory testing. Participants with a family history of AUD (relative to those without) evinced a pro-nociceptive pain modulation profile in response to experimental pain. Specifically, family history of AUD was associated with deficits in pain-inhibitory processes. Approximately 4% of the variance in endogenous pain modulation was accounted for by family history, and exploratory analyses suggested these effects may be driven by paternal AUD. PERSPECTIVE: The current findings suggest individuals with a family history of AUD demonstrate pain modulatory function that may predispose them to the development of chronic pain. Clinically, these data may inform pain management approaches for individuals with a family history of AUD.
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Affiliation(s)
- Kyle M White
- Department of Psychology, Syracuse University, Syracuse, New York
| | - Lisa R LaRowe
- Department of Behavioral and Social Sciences, School of Public Health, Brown University, Providence, Rhode Island
| | - Jessica M Powers
- Department of Psychology, Syracuse University, Syracuse, New York
| | | | - Stephen A Maisto
- Department of Psychology, Syracuse University, Syracuse, New York
| | - Michael J Zvolensky
- Department of Psychology, University of Houston, Houston, Texas.; Department of Behavioral Science, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Stephen J Glatt
- Department of Psychiatry and Behavioral Sciences, The State University of New York (SUNY) Upstate Medical University, Syracuse, New York
| | - Joseph W Ditre
- Department of Psychology, Syracuse University, Syracuse, New York..
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23
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Queiroz BFG, Fonseca FCS, Ferreira RCM, Romero TRL, Perez AC, Duarte IDG. Analgesia and pain: Dual effect of dopamine on the peripheral nociceptive system is dependent on D 2-or D 1-like receptor activation. Eur J Pharmacol 2022; 922:174872. [PMID: 35300994 DOI: 10.1016/j.ejphar.2022.174872] [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: 12/17/2021] [Revised: 02/24/2022] [Accepted: 03/07/2022] [Indexed: 11/29/2022]
Abstract
In this study, a pharmacological approach, together with the paw pressure test, was used to investigate the role of dopamine and its receptors in the peripheral processing of the nociceptive response in mice. Initially, the administration of dopamine (5, 20, and 80 ng/paw) in the hind paw of male Swiss mice (30-40 g) promoted antinociceptive effects in a dose-dependent manner. This was considered a peripheral effect, as it did not produce changes in the nociceptive threshold of the contralateral paw. The D2, D3, and D4 dopamine receptor antagonists remoxipride (4 μg/paw), U99194 (16 μg/paw), and L-745,870 (16 μg/paw), respectively, reversed the dopamine-mediated antinociception in mice with PGE2-induced hyperalgesia. The D1 and D5 dopamine receptor antagonists SKF 83566 (2 μg/paw) and SCH 23390 (1.6 μg/paw), respectively, did not alter dopamine antinociception. In contrast, dopamine at higher doses (0.1, 1, and 10 μg/paw) caused hyperalgesia in the animals, and the D1 and D5 receptor antagonists reversed this pronociceptive effect (10 μg/paw), whereas the D2 receptor antagonist remoxipride did not. Our data suggest that dopamine has a dual effect that depends on the dose, as it causes peripheral antinociceptive effects at small doses via the activation of D2-like receptors and nociceptive effects at higher doses via the activation of D1-like receptors.
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Affiliation(s)
- B F G Queiroz
- Department of Pharmacology, Federal University of Minas Gerais (UFMG), Brazil
| | - F C S Fonseca
- Department of Pharmacology, Federal University of Minas Gerais (UFMG), Brazil
| | - R C M Ferreira
- Department of Pharmacology, Federal University of Minas Gerais (UFMG), Brazil
| | - T R L Romero
- Department of Pharmacology, Federal University of Minas Gerais (UFMG), Brazil
| | - A C Perez
- Department of Pharmacology, Federal University of Minas Gerais (UFMG), Brazil
| | - I D G Duarte
- Department of Pharmacology, Federal University of Minas Gerais (UFMG), Brazil.
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24
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Morgese MG, Bove M, Di Cesare Mannelli L, Schiavone S, Colia AL, Dimonte S, Mhillaj E, Sikora V, Tucci P, Ghelardini C, Trabace L. Precision Medicine in Alzheimer's Disease: Investigating Comorbid Common Biological Substrates in the Rat Model of Amyloid Beta-Induced Toxicity. Front Pharmacol 2022; 12:799561. [PMID: 35046821 PMCID: PMC8763383 DOI: 10.3389/fphar.2021.799561] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 12/01/2021] [Indexed: 12/30/2022] Open
Abstract
Alzheimer's disease (AD), one of the most widespread neurodegenerative disorder, is a fatal global burden for the elder population. Although many efforts have been made, the search of a curative therapy is still ongoing. Individuating phenotypic traits that might help in investigating treatment response is of growing interest in AD research. AD is a complex pathology characterized by many comorbidities, such as depression and increased susceptibility to pain perception, leading to postulate that these conditions may rely on common biological substrates yet to be determined. In order to investigate those biological determinants to be associable with phenotypic traits, we used the rat model of amyloid beta-induced toxicity. This established model of early phase of AD is obtained by the intracerebroventricular injection of soluble amyloid beta1-42 (Aβ) peptide 7 days before performing experiments. In this model, we have previously reported increased immobility in the forced swimming test, reduced cortical serotonin levels and subtle alterations in the cognitive domain a depressive-like phenotype associated with subtle alteration in memory processes. In light of evaluating pain perception in this animal model, we performed two different behavioral tests commonly used, such as the paw pressure test and the cold plate test, to analyze mechanical hyperalgesia and thermal allodynia, respectively. Behavioural outcomes confirmed the memory impairment in the social recognition test and, compared to sham, Aβ-injected rats showed an increased selective susceptibility to mechanical but not to thermal stimulus. Behavioural data were then corroborated by neurochemical and biochemical biomarker analyses either at central or peripheral level. Data showed that the peptide injection evoked a significant increase in hypothalamic glutamate, kynurenine and dopamine content, while serotonin levels were reduced. Plasma Cystatin-C, a cysteine protease, was increased while serotonin and melatonin levels were decreased in Aβ-injected rats. Urinary levels paralleled plasma quantifications, indicating that Aβ-induced deficits in pain perception, mood and cognitive domain may also depend on these biomarkers. In conclusion, in the present study, we demonstrated that this animal model can mimic several comorbid conditions typical of the early phase of AD. Therefore, in the perspective of generating novel therapeutic strategies relevant to precision medicine in AD, this animal model and the biomarkers evaluated herein may represent an advantageous approach.
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Affiliation(s)
- Maria Grazia Morgese
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Maria Bove
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Lorenzo Di Cesare Mannelli
- Pharmacology and Toxicology Section, Department of Neuroscience, Psychology, Drug Research and Child Health (NEUROFARBA), University of Firenze, Firenze, Italy
| | - Stefania Schiavone
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Anna Laura Colia
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Stefania Dimonte
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Emanuela Mhillaj
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Vladyslav Sikora
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
- Department of Pathology, Sumy State University, Sumy, Ukraine
| | - Paolo Tucci
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Carla Ghelardini
- Pharmacology and Toxicology Section, Department of Neuroscience, Psychology, Drug Research and Child Health (NEUROFARBA), University of Firenze, Firenze, Italy
| | - Luigia Trabace
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
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25
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Martins CP, Paes RS, Baldasso GM, Ferrarini EG, Scussel R, Zaccaron RP, Machado-de-Ávila RA, Lock Silveira PC, Dutra RC. Pramipexole, a dopamine D3/D2 receptor-preferring agonist, attenuates reserpine-induced fibromyalgia-like model in mice. Neural Regen Res 2022; 17:450-458. [PMID: 34269222 PMCID: PMC8463993 DOI: 10.4103/1673-5374.317984] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Fibromyalgia (FM) is a complex pathology described as persistent hyperalgesia including somatic and mood dysfunctions, depression and anxiety. Although the etiology of FM is still unknown, a significant decrease in biogenic amines is a common characteristic in its pathogenesis. Here, our main objective was to investigate the role of dopamine D3/D2 receptor during the reserpine-induced pain in mice. Our results showed that pramipexole (PPX) - a dopaminergic D3/D2 receptor agonist - inhibited mechanical allodynia and thermal sensitivity induced by reserpine. Relevantly, PPX treatment decreased immobility time and increased the number of grooming in the forced swimming test and splash test, respectively. Animals that received PPX remained longer in the open arms than the reserpine group using elevated plus-maze apparatus. The repeated PPX administration, given daily for 4 days, significantly blocked the mechanical and thermal allodynia during FM model, similarly to pregabalin, although it failed to affect the reserpine-induced thermal nociception. Reserpine administration induced significant downregulation of dopamine concentration in the central nervous system, and repeated treatment with PPX restored dopamine levels in the frontal cortex and spinal cord tissues. Moreover, PPX treatment inhibited oxidants production such as DCFH (2',7'-dichlorodihydrofluorescein) and nitrite, also decreased oxidative damage (carbonyl), and upregulated the activity of superoxide dismutase in the spinal cord. Together, our findings demonstrated the ability of dopamine D3/D2 receptor-preferring agonist in reducing pain and mood dysfunction allied to FM in mice. All experimental protocols were approved by the Universidade Federal de Santa Catarina (UFSC) Ethics Committee (approval No. 2572210218) on May 10, 2018.
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Affiliation(s)
- Carlos Pereira Martins
- Laboratory of Autoimmunity and Immunopharmacology, Department of Health Sciences, Campus Araranguá, Universidade Federal de Santa Catarina, Araranguá; Post-Graduate Program of Neuroscience, Center of Biological Sciences, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Rodrigo Sebben Paes
- Laboratory of Autoimmunity and Immunopharmacology, Department of Health Sciences, Campus Araranguá, Universidade Federal de Santa Catarina, Araranguá, SC, Brazil
| | - Gabriela Mantovani Baldasso
- Laboratory of Autoimmunity and Immunopharmacology, Department of Health Sciences, Campus Araranguá, Universidade Federal de Santa Catarina, Araranguá, SC, Brazil
| | - Eduarda Gomes Ferrarini
- Laboratory of Autoimmunity and Immunopharmacology, Department of Health Sciences, Campus Araranguá, Universidade Federal de Santa Catarina, Araranguá; Post-Graduate Program of Neuroscience, Center of Biological Sciences, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Rahisa Scussel
- Laboratory of Experimental Physiopathology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - Rubya Pereira Zaccaron
- Laboratory of Experimental Physiopathology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - Ricardo Andrez Machado-de-Ávila
- Laboratory of Experimental Physiopathology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - Paulo Cesar Lock Silveira
- Laboratory of Experimental Physiopathology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - Rafael Cypriano Dutra
- Laboratory of Autoimmunity and Immunopharmacology, Department of Health Sciences, Campus Araranguá, Universidade Federal de Santa Catarina, Araranguá; Post-Graduate Program of Neuroscience, Center of Biological Sciences, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
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26
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Ferri R, Mogavero MP, Bruni O, Picchietti DL, Kapoor V, Del Rosso LM. Leg Movements during Sleep in Children Treated with Serotonergic Antidepressants. Sleep 2021; 45:6372262. [PMID: 34536283 DOI: 10.1093/sleep/zsab236] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 08/05/2021] [Indexed: 11/13/2022] Open
Abstract
STUDY OBJECTIVES To evaluate leg movements during sleep (LMS) in children taking serotonergic antidepressants, compared to those of children with restless legs syndrome (RLS) and controls, and to assess the time structure of intermovement intervals (IMI). METHODS Twenty-three children (12 girls, mean age 14.1 years) on antidepressants and with a total LMS index ≥15/hour, 21 drug-naïve RLS children (11 girls, mean age 13.6 years) also with total LMS index ≥15/hour, and 35 control children (17 girls, mean age 14.3 years) were recruited. LMS were scored and a series of parameters was calculated, along with the analysis of their time structure. RESULTS Children taking antidepressants showed higher total and periodic LMS (PLMS) indexes than both controls and RLS children, as well as higher short-interval and isolated LMS indexes than controls. LMS periodicity was highest in children on antidepressants. In children taking antidepressants, a well-defined PLMS IMI peak corresponding to ~10-60 s, with a maximum at ~20 s was present, which was much less evident in RLS patients and absent in controls. A progressive decrease of PLMS during the night and more frequent arousals were found in children on antidepressants and with RLS. CONCLUSIONS Children taking serotonergic antidepressants show higher periodicity LMS than children with RLS or controls and have a higher number of PLMS through the night. Antidepressant-associated PLMS in children seem to have features similar to PLMS of adults with RLS. Whether this is a marker of an increased risk to develop RLS later in life needs to be determined.
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Affiliation(s)
- Raffaele Ferri
- Sleep Research Centre, Department of Neurology I.C., Oasi Research Institute - IRCCS, Troina, Italy
| | - Maria P Mogavero
- Istituti Clinici Scientifici Maugeri, IRCCS, Scientific Institute of Pavia, Italy
| | - Oliviero Bruni
- Department of Social and Developmental Psychology, Sapienza University, Rome, Italy
| | - Daniel L Picchietti
- University of Illinois School of Medicine, Carle Illinois College of Medicine, and Carle Foundation Hospital, Urbana, IL, USA
| | - Vidhi Kapoor
- Seattle Children's Hospital and University of Washington, Seattle, WA, USA
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27
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Day-Night Variations in the Concentration of Neurotransmitters in the Rat Lumbar Spinal Cord. J Circadian Rhythms 2021; 19:9. [PMID: 34326881 PMCID: PMC8300578 DOI: 10.5334/jcr.215] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 05/27/2021] [Indexed: 12/20/2022] Open
Abstract
The purpose of this study was to analyze the light-dark variations in the concentrations of several neurotransmitters in the lumbar spinal cord of rats. Six groups of male Wistar rats were exposed to a 12 h light-12 h dark cycle for 70 days. At different time points of the experimental day (8, 12, 16, 20, 24 and 4 h), one of the groups of rats was randomly selected to be sacrificed, and the spinal cords were removed. The gamma-aminobutyric acid (GABA), glutamate (GLU), dopamine, serotonin, epinephrine (E), and norepinephrine (NE) levels in each extracted spinal cord were measured with high-pressure liquid chromatography (HPLC)-EQ and HPLC-fluorescence systems. Our results indicate that the spinal concentrations of GABA and GLU showed sinusoidal variation in a 24 h cycle, with the highest peak in the dark period (~20 h). Dopamine and serotonin also fluctuated in concentration but peaked in the light period (between 8 and 12 h), while E and NE concentrations showed no significant fluctuations. The possible relationship between neurotransmitter spinal concentration and sensitivity to pain and locomotor activity is discussed. It was concluded that most of the neurotransmitter levels in the lumbar spinal cord showed circadian fluctuations coupled to a light-dark cycle.
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28
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Elma Ö, Lebuf E, Marnef AQ, Tümkaya Yilmaz S, Coppieters I, Clarys P, Nijs J, Malfliet A, Deliens T. Diet can exert both analgesic and pronociceptive effects in acute and chronic pain models: a systematic review of preclinical studies. Nutr Neurosci 2021; 25:2195-2217. [PMID: 34096825 DOI: 10.1080/1028415x.2021.1934956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Although diet is an essential aspect of human health, the link between diet and pain is still not well understood. Preclinical animal research provides information to understand underlying mechanisms that allow identifying the needs for human research. OBJECTIVES This study aims to give a systematic overview of the current evidence from preclinical studies regarding the analgesic and pronociceptive effects of various diets in non-neuropathic, non-cancer, or non-visceral acute and chronic pain models. STUDY DESIGN A systematic Review. SETTING This study examined studies that investigate the analgesic and pronociceptive effects of various diets in non-neuropathic, non-cancer, or non-visceral acute and chronic pain models. METHODS This review was conducted following the PRISMA guidelines and was registered in PROSPERO with the registration number CRD42019133473. The certainty of evidence was examined by a modified GRADE approach. RESULTS After the screening process twenty-four eligible papers were included in this review. Nineteen studies examined acute pain, nine studies chronic inflammatory pain, and four studies assessed both acute and chronic pain models. LIMITATIONS Due to the heterogeneity of the included studies, a meta-analysis was not included in this study. CONCLUSIONS In animal models, excessive saturated, monounsaturated or omega-6 polyunsaturated fat ingestion and diets rich in fats and carbohydrates can decrease pain sensitivity in acute nociceptive pain, whereas it can induce mechanical allodynia and heat hyperalgesia in chronic inflammatory pain. Additionally, diets rich in anti-inflammatory ingredients, as well as a calorie-restricted diet can promote recovery from primary mechanical allodynia and heat hyperalgesia in chronic inflammatory pain.
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Affiliation(s)
- Ömer Elma
- Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Pain in Motion international research group, Vrije Universiteit Brussel, Brussels, Belgium
| | - Elien Lebuf
- Department of Rehabilitation Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Arturo Quiroz Marnef
- Department of Rehabilitation Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Sevilay Tümkaya Yilmaz
- Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Pain in Motion international research group, Vrije Universiteit Brussel, Brussels, Belgium
| | - Iris Coppieters
- Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Pain in Motion international research group, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Medicine and Physiotherapy, University Hospital Brussels, Brussels, Belgium.,Department of Rehabilitation Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Peter Clarys
- Department of Movement and Sport Sciences, Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Jo Nijs
- Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Pain in Motion international research group, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Medicine and Physiotherapy, University Hospital Brussels, Brussels, Belgium.,Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden
| | - Anneleen Malfliet
- Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education & Physiotherapy, Pain in Motion international research group, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Medicine and Physiotherapy, University Hospital Brussels, Brussels, Belgium
| | - Tom Deliens
- Department of Movement and Sport Sciences, Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium
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29
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Driving effect of BDNF in the spinal dorsal horn on neuropathic pain. Neurosci Lett 2021; 756:135965. [PMID: 34022262 DOI: 10.1016/j.neulet.2021.135965] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/30/2021] [Accepted: 05/11/2021] [Indexed: 12/11/2022]
Abstract
Neuropathic pain (NP) is caused by direct or indirect damage to the nervous system and is a common symptom of many diseases. The mechanisms underlying the onset and persistence of NP are unclear. Therefore, research concerning these mechanisms has become an important focus in the medical field. Brain-derived neurotrophic factor (BDNF) is a member of the neurotrophic factor family of signaling molecules. BDNF is an important regulator of neuronal development, synaptic transmission, and cellular and synaptic plasticity, which are essential for nerve maintenance and repair. However, BDNF is upregulated in the spinal dorsal horn and can promote NP by activating glial cells, reducing inhibitory functions and enhancing excitement after nociceptive stimulation. This review considers the relationship between NP and BDNF signaling in the spinal dorsal horn and discusses potentially related pathological mechanisms.
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30
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de Corde-Skurska A, Krzascik P, Lesniak A, Sacharczuk M, Nagraba L, Bujalska-Zadrozny M. Disulfiram Abrogates Morphine Tolerance-A Possible Role of µ-Opioid Receptor-Related G-Protein Activation in the Striatum. Int J Mol Sci 2021; 22:4057. [PMID: 33919998 PMCID: PMC8071001 DOI: 10.3390/ijms22084057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/30/2021] [Accepted: 04/06/2021] [Indexed: 12/22/2022] Open
Abstract
One of the key strategies for effective pain management involves delaying analgesic tolerance. Early clinical reports indicate an extraordinary effectiveness of off-label disulfiram-an agent designed for alcohol use disorder-in potentiating opioid analgesia and abrogation of tolerance. Our study aimed to determine whether sustained µ-opioid signaling upon disulfiram exposure contributes to these phenomena. Wistar rats were exposed to acute and chronic disulfiram and morphine cotreatment. Nociceptive thresholds were assessed with the mechanical Randal-Selitto and thermal tail-flick tests. µ-opioid receptor activation in brain structures important for pain processing was carried out with the [35S]GTPγS assay. The results suggest that disulfiram (12.5-50 mg/kg i.g.) augmented morphine antinociception and diminished morphine (25 mg/kg, i.g.) tolerance in a supraspinal, opioid-dependent manner. Disulfiram (25 mg/kg, i.g.) induced a transient enhancement of µ-opioid receptor activation in the periaqueductal gray matter (PAG), rostral ventromedial medulla (RVM), hypothalamus, prefrontal cortex and the dorsal striatum at day 1 of morphine treatment. Disulfiram rescued µ-opioid receptor signaling in the nucleus accumbens and caudate-putamen 14 days following morphine and disulfiram cotreatment. The results of this study suggest that striatal µ-opioid receptors may contribute to the abolition of morphine tolerance following concomitant treatment with disulfiram.
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Affiliation(s)
- Anna de Corde-Skurska
- Department of Pharmacodynamics, Centre for Preclinical Research and Technology, Medical University of Warsaw, Banacha 1b Str., 02-097 Warsaw, Poland; (A.d.C.-S.); (A.L.)
| | - Pawel Krzascik
- Department of Experimental and Clinical Pharmacology, Centre for Preclinical Research and Technology, Medical University of Warsaw, Banacha 1b Str., 02-097 Warsaw, Poland;
| | - Anna Lesniak
- Department of Pharmacodynamics, Centre for Preclinical Research and Technology, Medical University of Warsaw, Banacha 1b Str., 02-097 Warsaw, Poland; (A.d.C.-S.); (A.L.)
| | - Mariusz Sacharczuk
- Department of Experimental Genomics, Institute of Genetics and Animal Biotechnology in Jastrzebiec, Polish Academy of Sciences, Postepu 36A Str., 05-552 Magdalenka, Poland;
| | - Lukasz Nagraba
- Department of Orthopaedics and Rehabilitation, Medical University of Warsaw, Bursztynowa 2 Str., 04-749 Warsaw, Poland;
| | - Magdalena Bujalska-Zadrozny
- Department of Pharmacodynamics, Centre for Preclinical Research and Technology, Medical University of Warsaw, Banacha 1b Str., 02-097 Warsaw, Poland; (A.d.C.-S.); (A.L.)
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The Distinct Functions of Dopaminergic Receptors on Pain Modulation: A Narrative Review. Neural Plast 2021; 2021:6682275. [PMID: 33688340 PMCID: PMC7920737 DOI: 10.1155/2021/6682275] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 02/06/2021] [Accepted: 02/09/2021] [Indexed: 12/18/2022] Open
Abstract
Chronic pain is considered an economic burden on society as it often results in disability, job loss, and early retirement. Opioids are the most common analgesics prescribed for the management of moderate to severe pain. However, chronic exposure to these drugs can result in opioid tolerance and opioid-induced hyperalgesia. On pain modulation strategies, exploiting the multitarget drugs with the ability of the superadditive or synergistic interactions attracts more attention. In the present report, we have reviewed the analgesic effects of different dopamine receptors, particularly D1 and D2 receptors, in different regions of the central nervous system, including the spinal cord, striatum, nucleus accumbens (NAc), and periaqueductal gray (PAG). According to the evidence, these regions are not only involved in pain modulation but also express a high density of DA receptors. The findings can be categorized as follows: (1) D2-like receptors may exert a higher analgesic potency, but D1-like receptors act in different manners across several mechanisms in the mentioned regions; (2) in the spinal cord and striatum, antinociception of DA is mainly mediated by D2-like receptors, while in the NAc and PAG, both D1- and D2-like receptors are involved as analgesic targets; and (3) D2-like receptor agonists can act as adjuvants of μ-opioid receptor agonists to potentiate analgesic effects and provide a better approach to pain relief.
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Bao YN, Dai WL, Fan JF, Ma B, Li SS, Zhao WL, Yu BY, Liu JH. The dopamine D1-D2DR complex in the rat spinal cord promotes neuropathic pain by increasing neuronal excitability after chronic constriction injury. Exp Mol Med 2021; 53:235-249. [PMID: 33558591 PMCID: PMC8080784 DOI: 10.1038/s12276-021-00563-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 12/08/2020] [Accepted: 12/14/2020] [Indexed: 01/30/2023] Open
Abstract
Dopamine D1 receptor (D1DR) and D2 receptor (D2DR) are closely associated with pain modulation, but their exact effects on neuropathic pain and the underlying mechanisms remain to be identified. Our research revealed that intrathecal administration of D1DR and D2DR antagonists inhibited D1-D2DR complex formation and ameliorated mechanical and thermal hypersensitivity in chronic constriction injury (CCI) rats. The D1-D2DR complex was formed in the rat spinal cord, and the antinociceptive effects of D1DR and D2DR antagonists could be reversed by D1DR, D2DR, and D1-D2DR agonists. Gαq, PLC, and IP3 inhibitors also alleviated CCI-induced neuropathic pain. D1DR, D2DR, and D1-D2DR complex agonists all increased the intracellular calcium concentration in primary cultured spinal neurons, and this increase could be reversed by D1DR, D2DR antagonists and Gαq, IP3, PLC inhibitors. D1DR and D2DR antagonists significantly reduced the expression of p-PKC γ, p-CaMKII, p-CREB, and p-MAPKs. Levo-corydalmine (l-CDL), a monomeric compound in Corydalis yanhusuo W.T. Wang, was found to obviously suppress the formation of the spinal D1-D2DR complex to alleviate neuropathic pain in CCI rats and to decrease the intracellular calcium concentration in spinal neurons. l-CDL-induced inhibition of p-PKC γ, p-MAPKs, p-CREB, and p-CaMKII was also reversed by D1DR, D2DR, and D1-D2DR complex agonists. In conclusion, these results indicate that D1DR and D2DR form a complex and in turn couple with the Gαq protein to increase neuronal excitability via PKC γ, CaMKII, MAPK, and CREB signaling in the spinal cords of CCI rats; thus, they may serve as potential drug targets for neuropathic pain therapy.
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Affiliation(s)
- Yi-Ni Bao
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China
| | - Wen-Ling Dai
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China
| | - Ji-Fa Fan
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China
| | - Bin Ma
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China
| | - Shan-Shan Li
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China
| | - Wan-Li Zhao
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China
| | - Bo-Yang Yu
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China.
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China.
| | - Ji-Hua Liu
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China.
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China.
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Tang DL, Luan YW, Zhou CY, Xiao C. D2 receptor activation relieves pain hypersensitivity by inhibiting superficial dorsal horn neurons in parkinsonian mice. Acta Pharmacol Sin 2021; 42:189-198. [PMID: 32694753 DOI: 10.1038/s41401-020-0433-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 05/08/2020] [Indexed: 02/07/2023] Open
Abstract
Chronic pain is a common and undertreated nonmotor symptom in Parkinson's disease (PD). Although chronic pain is improved by L-dopa in some PD patients, the underlying mechanisms remain unclear. In this study, we established PD mice by unilateral microinjection of 6-OHDA in the medial forebrain bundle to investigate the contribution of spinal cord dopamine receptors to parkinsonian pain hypersensitivity. The von Frey filament tests and thermal pain tests revealed that these PD mice displayed decreased nociceptive thresholds in both hindpaws; intrathecal injection of L-dopa or apomorphine significantly increased the mechanical and thermal nociceptive thresholds, and the analgesic effect was mimicked by ropinirole (a D2 receptor agonist), but not SKF38393 (a D1/D5 receptor agonist), and blocked by sulpiride (a D2 receptor antagonist), but not SKF83566 (a D1/D5 receptor antagonist). Whole-cell recordings in lumber spinal cord slices showed that superficial dorsal horn (SDH) neurons in PD mice exhibited hyperexcitability, including more depolarized resting membrane potentials and more action potentials evoked by depolarizing current steps, which were mitigated by ropinirole. Furthermore, ropinirole inhibited the frequency of spontaneous excitatory postsynaptic currents (sEPSCs) in SDH neurons more strongly in PD mice than in control mice. However, sulpiride caused less disinhibition of sEPSCs in PD mice than in control mice. Taken together, our data reveal that pain hypersensitivity in PD mice is associated with hyperexcitability of SDH neurons, and both events are reversed by activation of spinal D2 receptors. Therefore, spinal D2 receptors can be promising therapeutic targets for the treatment of PD pain.
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Alterations of Dopamine-Related Transcripts in A11 Diencephalospinal Pathways after Spinal Cord Injury. Neural Plast 2021; 2021:8838932. [PMID: 33510781 PMCID: PMC7822663 DOI: 10.1155/2021/8838932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/04/2020] [Accepted: 01/05/2021] [Indexed: 12/15/2022] Open
Abstract
The diencephalic A11 nuclei are the primary source of spinal dopamine (DA). Neurons in this region project to all levels of the spinal cord. Traumatic spinal cord injury (SCI) often interrupts descending and ascending neuronal pathways and further elicits injury-induced neuronal plasticity. However, it is unknown how A11 neurons and projections respond to SCI-induced axotomy. Based on preliminary observation, we hypothesized that A11 DA-ergic neurons rostral to the lesion site might change their capacity to synthesize DA after SCI. Adult rats received a complete spinal cord transection at the 10th thoracic (T10) level. After 3 or 8 weeks, rostral (T5) and caudal (L1) spinal cord tissue was collected to measure mRNA levels of DA-related genes. Meanwhile, A11 neurons in the brain were explicitly isolated by laser capture microdissection, and single-cell qPCR was employed to evaluate mRNA levels in the soma. Histological analysis was conducted to assess the number of A11 DA-ergic neurons. The results showed that, compared to naïve rats, mRNA levels of tyrosine hydroxylase (TH), dopamine decarboxylase (DDC), and D2 receptors in the T5 spinal segment had a transient decrease and subsequent recovery. However, dopamine-β-hydroxylase (DBH), D1 receptors, and DA-associated transcription factors did not change following SCI. Furthermore, axon degeneration below the lesion substantially reduced mRNA levels of TH and D2 in the L1 spinal segment. However, DDC transcript underwent only a temporary decrease. Similar mRNA levels of DA-related enzymes were detected in the A11 neuronal soma between naïve and SCI rats. In addition, immunostaining revealed that the number of A11 DA neurons did not change after SCI, indicating a sustention of capacity to synthesize DA in the neuroplasm. Thus, impaired A11 diencephalospinal pathways following SCI may transiently reduce DA production in the spinal cord rostral to the lesion but not in the brain.
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Wang ML, Song Y, Liu JX, Du YL, Xiong S, Fan X, Wang J, Zhang ZD, Mao LQ, Ma FR. Role of the caudate-putamen nucleus in sensory gating in induced tinnitus in rats. Neural Regen Res 2021; 16:2250-2256. [PMID: 33818509 PMCID: PMC8354105 DOI: 10.4103/1673-5374.310692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Tinnitus can be described as the conscious perception of sound without external stimulation, and it is often accompanied by anxiety, depression, and insomnia. Current clinical treatments for tinnitus are ineffective. Although recent studies have indicated that the caudate-putamen nucleus may be a sensory gating area involved in noise elimination in tinnitus, the underlying mechanisms of this disorder are yet to be determined. To investigate the potential role of the caudate-putamen nucleus in experimentally induced tinnitus, we created a rat model of tinnitus induced by intraperitoneal administration of 350 mg/kg sodium salicylate. Our results revealed that the mean spontaneous firing rate of the caudate-putamen nucleus was increased by sodium salicylate treatment, while dopamine levels were decreased. In addition, electrical stimulation of the caudate-putamen nucleus markedly reduced the spontaneous firing rate of neurons in the primary auditory cortex. These findings suggest that the caudate-putamen nucleus plays a sensory gating role in sodium salicylate-induced tinnitus. This study was approved by the Institutional Animal Care and Use Committee of Peking University Health Science Center (approval No. A2010031) on December 6, 2017.
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Affiliation(s)
- Meng-Lin Wang
- Department of Otolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing, China
| | - Yu Song
- Department of Otolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing, China
| | - Jun-Xiu Liu
- Department of Otolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing, China
| | - Ya-Li Du
- Department of Otolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing, China
| | - Shan Xiong
- Department of Otolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing, China
| | - Xin Fan
- Department of Otolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing, China
| | - Jiang Wang
- Department of Otolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing, China
| | - Zhi-Di Zhang
- Department of Otolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing, China
| | - Lan-Qun Mao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, the Chinese Academy of Sciences, Beijing, China
| | - Fu-Rong Ma
- Department of Otolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing, China
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Cui ZK, Li SY, Liao K, Wang ZJ, Guo YL, Tang LS, Tang SB, Ma JH, Chen JS. Characteristics of neural growth and cryopreservation of the dorsal root ganglion using three-dimensional collagen hydrogel culture versus conventional culture. Neural Regen Res 2021; 16:1856-1864. [PMID: 33510093 PMCID: PMC8328787 DOI: 10.4103/1673-5374.306097] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
In vertebrates, most somatosensory pathways begin with the activation of dorsal root ganglion (DRG) neurons. The development of an appropriate DRG culture method is a prerequisite for establishing in vitro peripheral nerve disease models and for screening therapeutic drugs. In this study, we compared the changes in morphology, molecular biology, and transcriptomics of chicken embryo DRG cultured on tissue culture plates (T-DRG) versus three-dimensional collagen hydrogels (C-DRG). Our results showed that after 7 days of culture, the transcriptomics of T-DRG and C-DRG were quite different. The upregulated genes in C-DRG were mainly related to neurogenesis, axon guidance, and synaptic plasticity, whereas the downregulated genes in C-DRG were mainly related to cell proliferation and cell division. In addition, the genes related to cycles/pathways such as the synaptic vesicle cycle, cyclic adenosine monophosphate signaling pathway, and calcium signaling pathway were activated, while those related to cell-cycle pathways were downregulated. Furthermore, neurogenesis- and myelination-related genes were highly expressed in C-DRG, while epithelial–mesenchymal transition-, apoptosis-, and cell division-related genes were suppressed. Morphological results indicated that the numbers of branches, junctions, and end-point voxels per C-DRG were significantly greater than those per T-DRG. Furthermore, cells were scattered in T-DRG and more concentrated in C-DRG, with a higher ratio of 5-ethynyl-2′-deoxyuridine (EdU)-positive cells in T-DRG compared with C-DRG. C-DRG also had higher S100 calcium-binding protein B (S100B) and lower α-smooth muscle actin (α-SMA) expression than T-DRG, and contained fewer terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL)-positive cells after 48 hours of serum starvation. After cryopreservation, C-DRG maintained more intact morphological characteristics, and had higher viability and less TUNEL-positive cells than T-DRG. Furthermore, newly formed nerve bundles were able to grow along the existing Schwann cells in C-DRG. These results suggest that C-DRG may be a promising in vitro culture model, with better nerve growth and anti-apoptotic ability, quiescent Schwann cells, and higher viability. Results from this study provide a reference for the construction, storage, and transportation of tissue-engineered nerves. The study was approved by the Ethics Committee of Aier School of Ophthalmology, Central South University, China (approval No. 2020-IRB16), on March 15, 2020.
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Affiliation(s)
- Ze-Kai Cui
- Department of Ophthalmology, the Second Xiangya Hospital, Central South University; Aier Eye Institute; Aier School of Ophthalmology, Central South University, Changsha, Hunan Province, China
| | - Shen-Yang Li
- Aier School of Ophthalmology, Central South University, Changsha, Hunan Province, China
| | - Kai Liao
- Aier School of Ophthalmology, Central South University, Changsha, Hunan Province, China
| | - Zhi-Jie Wang
- Aier School of Ophthalmology, Central South University, Changsha, Hunan Province, China
| | - Yong-Long Guo
- Institute of Ophthalmology, Medical College, Jinan University; Department of Ophthalmology, First Affiliated Hospital of Jinan University; Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, Guangdong Province, China
| | - Luo-Sheng Tang
- Department of Ophthalmology, the Second Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Shi-Bo Tang
- Aier Eye Institute; Aier School of Ophthalmology, Central South University, Changsha, Hunan Province; CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China
| | - Jacey Hongjie Ma
- Department of Ophthalmology, the Second Xiangya Hospital, Central South University; Aier Eye Institute, Changsha, Hunan Province; Imaging and Functional Center, Guangzhou Aier Eye Hospital, Guangzhou, Guangdong Province, China
| | - Jian-Su Chen
- Aier Eye Institute; Aier School of Ophthalmology, Central South University, Changsha, Hunan Province; Institute of Ophthalmology, Medical College, Jinan University; Department of Ophthalmology, First Affiliated Hospital of Jinan University; Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, Guangdong Province, China
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Afridi B, Khan H, Akkol EK, Aschner M. Pain Perception and Management: Where do We Stand? Curr Mol Pharmacol 2021; 14:678-688. [PMID: 32525788 PMCID: PMC7728656 DOI: 10.2174/1874467213666200611142438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 04/18/2020] [Accepted: 04/29/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Pain is often flammable, sharp and sometimes described as an electrical shock. It can be categorized in three different ways as nociceptive, neuropathic and inflammatory. Nociceptive pain always originates in specific situations such as in trauma. Neuropathic pain results in nerve damage. In inflammatory pain, inflammatory mediators are involved in the sensitization of nociceptors. It is important to control the pain as it affects the individual physically, mentally, and socially. OBJECTIVE Recognizing pain physiopathology and pain pathways, defining the relationship between receptor and transmitter is critical in developing new treatment strategies. In this review, current information on the definitions, classifications, and physiological and chemical mechanisms involved in pain are reviewed. METHODS Various search engines were used to gather related articles/information. Only peer-reviewed journals were considered. Additional, books/chapters of standard publishers were also included in the article. RESULTS With a better understanding of the physiological and chemical mechanisms that play a role in pain, significant improvements have been made in pain treatment. Various oral or intravenous drugs, local injection treatments, physical and occupational therapy, electrical stimulation, alternative medicine applications, psychological support, and surgical applications are routinely performed in the treatment, dependent upon the type, severity and cause of the pain. CONCLUSION Improved understanding of pain physiopathology will serve as the basis for future improvements in the delivery of efficacious and reliable treatments, and is likely to rely on novel technological innovations.
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Affiliation(s)
- Bilal Afridi
- Department of Pharmacy, Abdul Wali Khan University Mardan 23200, Pakistan
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University Mardan 23200, Pakistan
| | - Esra Kupeli Akkol
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University 06330, Etiler/Ankara, Turkey
| | - Michael Aschner
- Department of Molecular Pharmacognosy, Albert Einstein College of Medicine, Bronx, NY 10463, USA
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Horii K, Ehara Y, Shiina T, Naitou K, Nakamori H, Horii Y, Shimaoka H, Saito S, Shimizu Y. Sexually dimorphic response of colorectal motility to noxious stimuli in the colorectum in rats. J Physiol 2020; 599:1421-1437. [PMID: 33347601 DOI: 10.1113/jp279942] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 12/02/2020] [Indexed: 12/17/2022] Open
Abstract
KEY POINTS This study showed a remarkable sex difference in responses of colorectal motility to noxious stimuli in the colorectum in rats: colorectal motility was enhanced in response to intracolonic administration of a noxious stimulant, capsaicin, in male rats but not in female rats. The difference in descending neurons from the brain to spinal cord operating after noxious stimulation could be responsible for the sex difference. In male rats, serotoninergic and dopaminergic neurons are dominantly activated, both of which activate the spinal defaecation centre. In female rats, GABAergic neurons in addition to serotoninergic neurons are activated. GABA may compete for facilitative action of 5-HT in the spinal defaecation centre, and thereby colorectal motility is not enhanced in response to intracolonic administration of capsaicin. The findings provide a novel insight into pathophysiological mechanisms of sex differences in functional defaecation disorders such as irritable bowel syndrome. ABSTRACT We previously demonstrated that noxious stimuli in the colorectum enhance colorectal motility through activation of descending pain inhibitory pathways in male rats. It can be expected that the regulatory mechanisms of colorectal motility differ in males and females owing to remarkable sex differences in descending pain inhibitory pathways. Thus, we aimed to clarify sex differences in responses of colorectal motility to noxious stimuli in rats. Colorectal motility was measured in vivo in anaesthetized rats. Administration of a noxious stimulant, capsaicin, into the colorectal lumen enhanced colorectal motility in male rats but not in female rats. Quantitative PCR and immunohistochemistry showed that TRPV1 expression levels in the dorsal root ganglia and in the colorectal mucosa were comparable in male and female rats. When a GABAA receptor inhibitor was intrathecally administered to the L6-S1 level of the spinal cord, colorectal motility was facilitated in response to intracolonic capsaicin even in female rats. The capsaicin-induced response in the presence of the GABA blocker in female rats was inhibited by intrathecal administration of 5-HT2 and -3 receptor antagonists but not by a D2-like dopamine receptor antagonist. Our findings demonstrate that intracolonic noxious stimulation activates GABAergic and serotoninergic descending neurons in female rats, whereas serotoninergic and dopaminergic neurons are dominantly activated in male rats. Thus, the difference in the descending neurons operating after noxious stimulation would be responsible for the sexually dimorphic responses of colorectal motility. Our findings provide a novel insight into pathophysiological mechanisms of sex differences in functional defaecation disorders such as irritable bowel syndrome.
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Affiliation(s)
- Kazuhiro Horii
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Yuka Ehara
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Takahiko Shiina
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Kiyotada Naitou
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Hiroyuki Nakamori
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Yuuki Horii
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Hiroki Shimaoka
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Shouichiro Saito
- Department of Basic Veterinary Science, Laboratory of Anatomy, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Yasutake Shimizu
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan.,Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, Gifu, Japan
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Intravenous Administration of Vitamin C in the Treatment of Herpes Zoster-Associated Pain: Two Case Reports and Literature Review. Pain Res Manag 2020; 2020:8857287. [PMID: 33335639 PMCID: PMC7723478 DOI: 10.1155/2020/8857287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 11/16/2020] [Indexed: 01/28/2023]
Abstract
Background Herpes zoster (HZ) is an acute inflammatory neurocutaneous disease caused by the reactivation of varicella-zoster virus. It is estimated that the incidence of postherpetic neuralgia following HZ is 10–20%. The leading risk factors of the prognosis are aging and immunity dysfunction. Vitamin C plays a pivoted role in enhancing white blood cell function. Epidemiological evidence and clinical studies have indicated an association between pain and suboptimal vitamin C status. At present, vitamin C has been used as an additional option in the treatment of HZ-associated pain. Despite the current controversy, case reports and randomized controlled studies have indicated that both acute- and postherpetic neuralgia can be dramatically alleviated following intravenous vitamin C infusions. Case Presentation. Two patients (male aged 72 and female 78 years) with HZ did not respond well to antiviral therapy and analgesics. Skin lesions in the right groin and front thigh healed after early antiviral therapy, but the outbreak of pain persisted in the male patient. The female patient presented to our clinic with clusters of rashes in the right forehead with severe edema of her right upper eyelid. Because nerve blockade could not be conducted for both patients, intravenous infusion of vitamin C was applied and resulted in an immediate remission of the breakthrough pain in the male patient and cutaneous lesions in the female patient. Conclusions The use of vitamin C appears to be an emerging treatment alternative for attenuating HZ and PHN pain. Hence, we recommend the addition of concomitant use of intravenously administered vitamin C into therapeutic strategies in the treatment of HZ-associated pain, especially for therapy-resistant cases. Furthermore, animal studies are required to determine analgesic mechanisms of vitamin C, and more randomized clinical trials are essential to further determine the optimal dose and timing of administration of vitamin C.
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Azizi SA. Monoamines: Dopamine, Norepinephrine, and Serotonin, Beyond Modulation, "Switches" That Alter the State of Target Networks. Neuroscientist 2020; 28:121-143. [PMID: 33292070 DOI: 10.1177/1073858420974336] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
How do monoamines influence the perceptual and behavioral aspects of brain function? A library of information regarding the genetic, molecular, cellular, and function of monoamines in the nervous system and other organs has accumulated. We briefly review monoamines' anatomy and physiology and discuss their effects on the target neurons and circuits. Monoaminergic cells in the brain stem receive inputs from sensory, limbic, and prefrontal areas and project extensively to the forebrain and hindbrain. We review selected studies on molecular, cellular, and electrophysiological effects of monoamines on the brain's target areas. The idea is that monoamines, by reversibly modulating the "primary" information processing circuits, regulate and switch the functions of brain networks and can reversibly alter the "brain states," such as consciousness, emotions, and movements. Monoamines, as the drivers of normal motor and sensory brain operations, including housekeeping, play essential roles in pathogenesis of neuropsychiatric diseases.
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Affiliation(s)
- Sayed Ausim Azizi
- Department of Neurology, Global Neuroscience Institute, Chester, PA, USA
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Antihyperalgesic effects of intrathecal perospirone in a rat model of neuropathic pain. Pharmacol Biochem Behav 2020; 195:172964. [DOI: 10.1016/j.pbb.2020.172964] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/15/2020] [Accepted: 06/01/2020] [Indexed: 12/21/2022]
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The role of spinally located dopamine D 2 receptors in the regulation of the blood glucose level in mice. Pharmacol Rep 2020; 72:1666-1675. [PMID: 32627115 DOI: 10.1007/s43440-020-00126-x] [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: 02/05/2020] [Revised: 06/22/2020] [Accepted: 07/01/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND The possible role of dopamine D2 receptors located in the spinal cord in the regulation of the blood glucose level have not been investigated before. METHODS In the present study, the effect of D2 receptor agonist and antagonist administered intrathecal (it) injection on the blood glucose level were examined in the Institute of Cancer Research (ICR) mice. RESULTS We found that it injection with carmoxirole (D2 receptor agonist) caused an elevation of the blood glucose level in a dose-dependent manner. Carmoxirole-induced increase of the blood glucose was significantly attenuated by L-741,626 (D2 receptor antagonist). Previously, we indicated that intrathecal (it) treatment with 0.1 μg/5 μl pertussis toxin (PTX, a Gi/Go inhibitor) produces a hypoglycemic effect in ICR in a long-term manner. In the present study, it pretreatment with PTX for 6 days almost abolished the hyperglycemic effect induced by carmoxirole. The plasma insulin level was elevated by carmoxirole, and L-741,626 or PTX pretreatment reduced carmoxirole-induced increment of the insulin level. In addition, the plasma corticosterone level was increased by carmoxirole but it pretreatment with L-741,626 or PTX did not affect carmoxirole-induced increment of the corticosterone level. CONCLUSION Our results suggest that D2 receptors located in the spinal cord play an important role in the elevation of the blood glucose level. Spinally located inhibitory G-proteins appear to be involved in hyperglycemic effect induced by carmoxirole.
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Sun W, Yang Y, Zhou F, Huang L, You C. Characteristics of sympathetic skin response in patients with Parkinson's disease accompanied by lower limb edema. Neurophysiol Clin 2020; 50:41-45. [DOI: 10.1016/j.neucli.2019.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 11/18/2019] [Accepted: 11/19/2019] [Indexed: 10/25/2022] Open
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Dolgorukova A, Osipchuk AV, Murzina AA, Sokolov AY. The Influence of Metoclopramide on Trigeminovascular Nociception: Possible Anti-migraine Mechanism of Action. Neuroscience 2019; 425:123-133. [PMID: 31785356 DOI: 10.1016/j.neuroscience.2019.11.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 11/05/2019] [Accepted: 11/15/2019] [Indexed: 12/20/2022]
Abstract
Metoclopramide is widely used as an abortive migraine therapy due to the advantage of having not only antiemetic, but also analgesic properties. Despite the proven clinical efficacy of metoclopramide in acute migraine, the mechanism of its anti-cephalalgic action has not been entirely elucidated. Taking into account the key role of the trigeminovascular system activation in migraine pathophysiology, we aimed to investigate metoclopramide effects on the excitability of central trigeminovascular neurons and neurogenic dural vasodilation using valid electrophysiological and neurovascular models of trigeminovascular nociception. Extracellular recordings of the activity of second-order dura-sensitive neurons were made in the trigeminocervical complex (TCC) of 16 anaesthetised rats. Cumulative metoclopramide infusion (three steps in 30 min intervals, 5 mg/kg i.v. per step, n = 8) significantly and dose-dependently suppressed both ongoing firing of the TCC neurons and their responses to dural electrical stimulation, maximally to 30%[0-49%] (median[Q1-Q3]) and 4%[0-30%] of the initial level, respectively (both p = 0.001, compared to saline (n = 8)). By contrast, the neurogenic dural vasodilation studied in a separate group of 12 rats was not significantly affected by cumulative infusion of metoclopramide (5 mg/kg i.v. per step, n = 6) compared to both baseline values and the vehicle group (n = 6) (all p > 0.05). These results provide evidence that metoclopramide is unable to affect the peripheral response to trigeminovascular activation, but it does suppress the central response, which is highly predictive of anti-migraine action. Thus, here we show the neurophysiological mechanism underlying the therapeutic efficacy of metoclopramide in migraine.
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Affiliation(s)
- Antonina Dolgorukova
- Department of Neuropharmacology, Valdman Institute of Pharmacology, Pavlov First Saint Petersburg State Medical University, L'va Tolstogo str. 6-8, 197022 Saint Petersburg, Russia.
| | - Anastasiia V Osipchuk
- Department of Neuropharmacology, Valdman Institute of Pharmacology, Pavlov First Saint Petersburg State Medical University, L'va Tolstogo str. 6-8, 197022 Saint Petersburg, Russia
| | - Anna A Murzina
- Department of Neuropharmacology, Valdman Institute of Pharmacology, Pavlov First Saint Petersburg State Medical University, L'va Tolstogo str. 6-8, 197022 Saint Petersburg, Russia
| | - Alexey Y Sokolov
- Department of Neuropharmacology, Valdman Institute of Pharmacology, Pavlov First Saint Petersburg State Medical University, L'va Tolstogo str. 6-8, 197022 Saint Petersburg, Russia; Laboratory of Cortico-Visceral Physiology, Pavlov Institute of Physiology of the Russian Academy of Sciences, Nab. Makarova 6, 199034 Saint Petersburg, Russia
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Cellular Mechanisms for Antinociception Produced by Oxytocin and Orexins in the Rat Spinal Lamina II-Comparison with Those of Other Endogenous Pain Modulators. Pharmaceuticals (Basel) 2019; 12:ph12030136. [PMID: 31527474 PMCID: PMC6789548 DOI: 10.3390/ph12030136] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 08/31/2019] [Accepted: 09/12/2019] [Indexed: 01/23/2023] Open
Abstract
Much evidence indicates that hypothalamus-derived neuropeptides, oxytocin, orexins A and B, inhibit nociceptive transmission in the rat spinal dorsal horn. In order to unveil cellular mechanisms for this antinociception, the effects of the neuropeptides on synaptic transmission were examined in spinal lamina II neurons that play a crucial role in antinociception produced by various analgesics by using the whole-cell patch-clamp technique and adult rat spinal cord slices. Oxytocin had no effect on glutamatergic excitatory transmission while producing a membrane depolarization, γ-aminobutyric acid (GABA)-ergic and glycinergic spontaneous inhibitory transmission enhancement. On the other hand, orexins A and B produced a membrane depolarization and/or a presynaptic spontaneous excitatory transmission enhancement. Like oxytocin, orexin A enhanced both GABAergic and glycinergic transmission, whereas orexin B facilitated glycinergic but not GABAergic transmission. These inhibitory transmission enhancements were due to action potential production. Oxytocin, orexins A and B activities were mediated by oxytocin, orexin-1 and orexin-2 receptors, respectively. This review article will mention cellular mechanisms for antinociception produced by oxytocin, orexins A and B, and discuss similarity and difference in antinociceptive mechanisms among the hypothalamic neuropeptides and other endogenous pain modulators (opioids, nociceptin, adenosine, adenosine 5’-triphosphate (ATP), noradrenaline, serotonin, dopamine, somatostatin, cannabinoids, galanin, substance P, bradykinin, neuropeptide Y and acetylcholine) exhibiting a change in membrane potential, excitatory or inhibitory transmission in the spinal lamina II neurons.
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Reynolds JA, Henwood MK, Turtle JD, Baine RE, Johnston DT, Grau JW. Brain-Dependent Processes Fuel Pain-Induced Hemorrhage After Spinal Cord Injury. Front Syst Neurosci 2019; 13:44. [PMID: 31551720 PMCID: PMC6746957 DOI: 10.3389/fnsys.2019.00044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 08/15/2019] [Indexed: 12/15/2022] Open
Abstract
Pain (nociceptive) input caudal to a spinal contusion injury can undermine long-term recovery and increase tissue loss (secondary injury). Prior work suggests that nociceptive stimulation has this effect because it fosters the breakdown of the blood-spinal cord barrier (BSCB) at the site of injury, allowing blood to infiltrate the tissue. The present study examined whether these effects impact tissue rostral and caudal to the site of injury. In addition, the study evaluated whether cutting communication with the brain, by means of a rostral transection, affects the development of hemorrhage. Eighteen hours after rats received a lower thoracic (T11-12) contusion injury, half underwent a spinal transection at T2. Noxious electrical stimulation (shock) was applied 6 h later. Cellular assays showed that, in non-transected rats, nociceptive stimulation increased hemoglobin content, activated pro-inflammatory cytokines and engaged signals related to cell death at the site of injury. These effects were not observed in transected animals. In the next experiment, the spinal transection was performed at the time of contusion injury. Nociceptive stimulation was applied 24 h later and tissue was sectioned for microscopy. In non-transected rats, nociceptive stimulation increased the area of hemorrhage and this effect was blocked by spinal transection. These findings imply that the adverse effect of noxious stimulation depends upon spared ascending fibers and the activation of rostral (brain) systems. If true, stimulation should induce less hemorrhage after a severe contusion injury that blocks transmission to the brain. To test this, rats were given a mild, moderate, or severe, injury and electrical stimulation was applied 24 h later. Histological analyses of longitudinal sections showed that nociceptive stimulation triggered less hemorrhage after a severe contusion injury. The results suggest that brain-dependent processes drive pain-induced hemorrhage after spinal cord injury (SCI).
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Affiliation(s)
- Joshua A Reynolds
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, United States
| | - Melissa K Henwood
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, United States
| | - Joel D Turtle
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, United States
| | - Rachel E Baine
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, United States
| | - David T Johnston
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, United States
| | - James W Grau
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, United States
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Mercado-Reyes J, Almanza A, Segura-Chama P, Pellicer F, Mercado F. D2-like receptor agonist synergizes the μ-opioid agonist spinal antinociception in nociceptive, inflammatory and neuropathic models of pain in the rat. Eur J Pharmacol 2019; 853:56-64. [PMID: 30876975 DOI: 10.1016/j.ejphar.2019.03.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 02/25/2019] [Accepted: 03/12/2019] [Indexed: 11/19/2022]
Abstract
Opioids are potent analgesic drugs, but their use has been limited due to their side effects. Antinociceptive effects of D2-like receptor agonists such as quinpirole have been shown at the spinal cord level; however, their efficacy is not as high as that of opioids. Dopaminergic agonists are long-prescribed and well-tolerated drugs that have been useful to treat clinically and experimentally painful conditions. Because current pain treatments are not completely effective, the aim of this work was to determine if a D2-like receptor agonist improves the antinociceptive effects of a μ-opioid receptor agonist. Drugs were intrathecally administered in adult rats; mechanonociceptive and thermonociceptive tests were carried out. Intraplantar injection of complete Freund's adjuvant (CFA) and sciatic loose ligation (SLL) were used for inflammatory and neuropathic models of pain, respectively. In intact animals, D-Ala2, N-MePhe4, Gly-ol-enkephalin (DAMGO; a µ-opioid receptor agonist) increased the paw withdrawal latencies (PWL) in thermal and mechanical nociceptive tests in a dose-dependent manner. Quinpirole (D2-like receptor agonist) increased PWL only in mechanonociception. In the presence of quinpirole (1 nmol), the ED50 of the mechanical antinociceptive effect of DAMGO was significantly decreased (8-fold). Coadministration of 1 nmol quinpirole and 30 pmol DAMGO completely reversed hyperalgesia in the CFA model, whereas 100 pmol DAMGO plus 1 nmol quinpirole reversed the allodynia in the SLL model. This work offers evidence about a synergistic antinociceptive effect between opioidergic and dopaminergic drugs. This combination may relieve painful conditions resistant to conventional treatments, and it may reduce the adverse effects of chronic opioid administration.
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Affiliation(s)
- Jonathan Mercado-Reyes
- Laboratorio de Fisiología Celular, Dirección de Investigaciones en Neurociencias. Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, Mexico
| | - Angélica Almanza
- Laboratorio de Fisiología Celular, Dirección de Investigaciones en Neurociencias. Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, Mexico
| | - Pedro Segura-Chama
- Laboratorio de Fisiología Celular, Dirección de Investigaciones en Neurociencias. Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, Mexico; Cátedras CONACyT - Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, Mexico
| | - Francisco Pellicer
- Laboratorio de Neurofisiología Integrativa, Dirección de Investigaciones en Neurociencias. Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, Mexico
| | - Francisco Mercado
- Laboratorio de Fisiología Celular, Dirección de Investigaciones en Neurociencias. Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, Mexico.
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