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Chi XT, Yang W, Zhang JB, Lei YT, Tao CC, Chen HN, Zheng ZK, Xin WJ, Xu T, Gao S, Zhang XQ. A Cross-Sectional and Longitudinal Integrated Study on Brain Functional Changes in a Neuropathic Pain Rat Model. eNeuro 2024; 11:ENEURO.0272-23.2024. [PMID: 38346901 PMCID: PMC10925899 DOI: 10.1523/eneuro.0272-23.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 12/25/2023] [Accepted: 01/24/2024] [Indexed: 03/10/2024] Open
Abstract
Human and animal imaging studies demonstrated that chronic pain profoundly alters the structure and the functionality of several brain regions and even causes mental dysfunctions such as depression and anxiety disorders. In this article, we conducted a multimodal study cross-sectionally and longitudinally, to evaluate how neuropathic pain affects the brain. Using the spared nerve injury (SNI) model which promotes long-lasting mechanical allodynia, results showed that neuropathic pain deeply modified the intrinsic organization of the brain functional network 2 weeks after injury. There are significant changes in the activity of the left thalamus (Th_L) and left olfactory bulb (OB_L) brain regions after SNI, as evidenced by both the blood oxygen level-dependent (BOLD) signal and c-Fos expression. Importantly, these changes were closely related to mechanical pain behavior of rats. However, it is worth noting that after morphine administration for analgesia, only the increased activity in the TH region is reversed, while the decreased activity in the OB region becomes more prominent. Functional connectivity (FC) and c-Fos correlation analysis further showed these two regions of interest (ROIs) exhibit different FC patterns with other brain regions. Our study comprehensively revealed the adaptive changes of brain neural networks induced by nerve injury in both cross-sectional and longitudinal dimensions and emphasized the abnormal activity and FC of Th_L and OB_L in the pathological condition. It provides reliable assistance in exploring the intricate mechanisms of diseases.
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Affiliation(s)
- Xin-Tian Chi
- The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), School of Health Management and Institute of Mental Psychology, Guangzhou Medical University, Guangzhou 511495, China
| | - Wu Yang
- The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), School of Health Management and Institute of Mental Psychology, Guangzhou Medical University, Guangzhou 511495, China
| | - Jian-Bo Zhang
- Department of Pain Management, State Key Specialty in Pain Medicine, Guangzhou Medical University Second Affiliated Hospital, Guangzhou 510260, China
| | - Yu-Tao Lei
- The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), School of Health Management and Institute of Mental Psychology, Guangzhou Medical University, Guangzhou 511495, China
| | - Chen-Chen Tao
- The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), School of Health Management and Institute of Mental Psychology, Guangzhou Medical University, Guangzhou 511495, China
| | - Hong-Ni Chen
- The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), School of Health Management and Institute of Mental Psychology, Guangzhou Medical University, Guangzhou 511495, China
| | - Zi-Kun Zheng
- Department of Electronic Engineering, Shantou University, Shantou 515063, China
| | - Wen-Jun Xin
- Guangdong Province Key Laboratory of Brain Function and Disease, Department of Physiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Ting Xu
- Guangdong Province Key Laboratory of Brain Function and Disease, Department of Physiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Shuang Gao
- The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), School of Health Management and Institute of Mental Psychology, Guangzhou Medical University, Guangzhou 511495, China
| | - Xue-Qin Zhang
- The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), School of Health Management and Institute of Mental Psychology, Guangzhou Medical University, Guangzhou 511495, China
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Wang JH, Wu C, Lian YN, Cao XW, Wang ZY, Dong JJ, Wu Q, Liu L, Sun L, Chen W, Chen WJ, Zhang Z, Zhuo M, Li XY. Single-cell RNA sequencing uncovers the cell type-dependent transcriptomic changes in the retrosplenial cortex after peripheral nerve injury. Cell Rep 2023; 42:113551. [PMID: 38048224 DOI: 10.1016/j.celrep.2023.113551] [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: 12/10/2021] [Revised: 05/14/2023] [Accepted: 11/20/2023] [Indexed: 12/06/2023] Open
Abstract
The retrosplenial cortex (RSC) is a vital area for storing remote memory and has recently been found to undergo broad changes after peripheral nerve injury. However, little is known about the role of RSC in pain regulation. Here, we examine the involvement of RSC in the pain of mice with nerve injury. Notably, reducing the activities of calcium-/calmodulin-dependent protein kinase type II-positive splenial neurons chemogenetically increases paw withdrawal threshold and extends thermal withdrawal latency in mice with nerve injury. The single-cell or single-nucleus RNA-sequencing results predict enhanced excitatory synaptic transmissions in RSC induced by nerve injury. Local infusion of 1-naphthyl acetyl spermine into RSC to decrease the excitatory synaptic transmissions relieves pain and induces conditioned place preference. Our data indicate that RSC is critical for regulating physiological and neuropathic pain. The cell type-dependent transcriptomic information would help understand the molecular basis of neuropathic pain.
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Affiliation(s)
- Jing-Hua Wang
- Department of Psychiatry of the Fourth Affiliated Hospital, International Institutes of Medicine, Zhejiang University School of Medicine, Yiwu, Zhejiang 322000, China; NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain, Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Cheng Wu
- Department of Psychiatry of the Fourth Affiliated Hospital, International Institutes of Medicine, Zhejiang University School of Medicine, Yiwu, Zhejiang 322000, China; NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain, Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China; Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Zhejiang University, Haining, Zhejiang 314400, China; Biomedical Sciences, College of Medicine and Veterinary Medicine, The University of Edinburgh, Edinburgh EH8 9JU, UK
| | - Yan-Na Lian
- Department of Psychiatry of the Fourth Affiliated Hospital, International Institutes of Medicine, Zhejiang University School of Medicine, Yiwu, Zhejiang 322000, China; NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain, Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xiao-Wen Cao
- Department of Psychiatry of the Fourth Affiliated Hospital, International Institutes of Medicine, Zhejiang University School of Medicine, Yiwu, Zhejiang 322000, China; NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain, Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Zi-Yue Wang
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain, Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Jia-Jun Dong
- Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Zhejiang University, Haining, Zhejiang 314400, China
| | - Qin Wu
- Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Zhejiang University, Haining, Zhejiang 314400, China
| | - Li Liu
- Core Facilities of the School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Li Sun
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain, Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Wei Chen
- Department of Psychiatry, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, China
| | - Wen-Juan Chen
- Department of Psychiatry, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310016, China
| | - Zhi Zhang
- Key Laboratory of Brain Functions and Diseases, School of Life Science, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Min Zhuo
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Xiang-Yao Li
- Department of Psychiatry of the Fourth Affiliated Hospital, International Institutes of Medicine, Zhejiang University School of Medicine, Yiwu, Zhejiang 322000, China; NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain, Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China; Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Zhejiang University, Haining, Zhejiang 314400, China; Biomedical Sciences, College of Medicine and Veterinary Medicine, The University of Edinburgh, Edinburgh EH8 9JU, UK.
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Bouguiyoud N, Xie WB, Bronchti G, Frasnelli J, Al Aïn S. Enhanced maternal behaviors in a mouse model of congenital blindness. Dev Psychobiol 2023; 65:e22406. [PMID: 37607896 DOI: 10.1002/dev.22406] [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: 07/18/2022] [Revised: 05/04/2023] [Accepted: 06/07/2023] [Indexed: 08/24/2023]
Abstract
In mammals, mothering is one of the most important prosocial female behavior to promote survival, proper sensorimotor, and emotional development of the offspring. Different intrinsic and extrinsic factors can initiate and maintain these behaviors, such as hormonal, cerebral, and sensory changes. Infant cues also stimulate multisensory systems and orchestrate complex maternal responsiveness. To understand the maternal behavior driven by complex sensory interactions, it is necessary to comprehend the individual sensory systems by taking out other senses. An excellent model for investigating sensory regulation of maternal behavior is a murine model of congenital blindness, the ZRDBA mice, where both an anophthalmic and sighted mice are generated from the same litter. Therefore, this study aims to assess whether visual inputs are essential to driving maternal behaviors in mice. Maternal behaviors were assessed using three behavioral tests, including the pup retrieval test, the home cage maternal behavior test, and the maternal aggression test. Our results show that blind mothers (1) took less time to retrieve their offspring inside the nest, (2) spent more time nursing and licking their offspring in the second- and third-week postpartum, and (3) exhibited faster aggressive behaviors when exposed to an intruder male, compared to the sighted counterparts. This study provides evidence that congenitally blind mothers show more motivation to retrieve the pups, care, and protection towards their pups than sighted ones, likely due to a phenomenon of sensory compensation.
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Affiliation(s)
- Nouhaila Bouguiyoud
- Department of Anatomy, Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada
- CogNAC Research Group, Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada
| | - Wen Bin Xie
- Department of Anatomy, Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada
| | - Gilles Bronchti
- Department of Anatomy, Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada
| | - Johannes Frasnelli
- Department of Anatomy, Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada
- CogNAC Research Group, Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada
| | - Syrina Al Aïn
- Department of Anatomy, Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada
- CogNAC Research Group, Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada
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Steele AG, Manson GA, Horner PJ, Sayenko DG, Contreras-Vidal JL. Effects of transcutaneous spinal stimulation on spatiotemporal cortical activation patterns: A proof-of-concept EEG study. J Neural Eng 2022; 19. [PMID: 35732141 DOI: 10.1088/1741-2552/ac7b4b] [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: 03/06/2022] [Accepted: 06/22/2022] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Transcutaneous spinal cord stimulation (TSS) has been shown to be a promising non-invasive alternative to epidural spinal cord stimulation (ESS) for improving outcomes of people with spinal cord injury (SCI). However, studies on the effects of TSS on cortical activation are limited. Our objectives were to evaluate the spatiotemporal effects of TSS on brain activity, and determine changes in functional connectivity under several different stimulation conditions. As a control, we also assessed the effects of functional electrical stimulation (FES) on cortical activity. APPROACH Non-invasive scalp electroencephalography (EEG) was recorded during TSS or FES while five neurologically intact participants performed one of three lower-limb tasks while in the supine position: (1) A no contraction control task, (2) a rhythmic contraction task, or (3) a tonic contraction task. After EEG denoising and segmentation, independent components were clustered across subjects to characterize sensorimotor networks in the time and frequency domains. Independent components of the event related potentials (ERPs) were calculated for each cluster and condition. Next, a Generalized Partial Directed Coherence (gPDC) analysis was performed on each cluster to compare the functional connectivity between conditions and tasks. RESULTS Independent Component analysis of EEG during TSS resulted in three clusters identified at Brodmann areas (BA) 9, BA 6, and BA 4, which are areas associated with working memory, planning, and movement control. Lastly, we found significant (p < 0.05, adjusted for multiple comparisons) increases and decreases in functional connectivity of clusters during TSS, but not during FES when compared to the no stimulation conditions. SIGNIFICANCE The findings from this study provide evidence of how TSS recruits cortical networks during tonic and rhythmic lower limb movements. These results have implications for the development of spinal cord-based computer interfaces, and the design of neural stimulation devices for the treatment of pain and sensorimotor deficit.
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Affiliation(s)
- Alexander G Steele
- Department of Neurosurgery, Houston Methodist Research Institute, 6670 Bertner Ave, Houston, Texas, 77030-2707, UNITED STATES
| | - Gerome A Manson
- Department of Neurosurgery, Houston Methodist Research Institute, 6670 Bertner Ave, Houston, Texas, 77030-2707, UNITED STATES
| | - Philip J Horner
- Department of Neurosurgery, Houston Methodist Research Institute, 6670 Bertner Ave, Houston, Texas, 77030-2707, UNITED STATES
| | - Dimitry G Sayenko
- Department of Neurosurgery, Houston Methodist Research Institute, 6670 Bertner Ave, Houston, Texas, 77030-2707, UNITED STATES
| | - Jose L Contreras-Vidal
- Electrical and Computer Engineering, University of Houston, N308 Engineering Building I, Houston, Texas, 77204-4005, UNITED STATES
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Motanis H, Khorasani LN, Giza CC, Harris NG. Peering into the Brain through the Retrosplenial Cortex to Assess Cognitive Function of the Injured Brain. Neurotrauma Rep 2021; 2:564-580. [PMID: 34901949 PMCID: PMC8655812 DOI: 10.1089/neur.2021.0044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The retrosplenial cortex (RSC) is a posterior cortical area that has been drawing increasing interest in recent years, with a growing number of studies studying its contribution to cognitive and sensory functions. From an anatomical perspective, it has been established that the RSC is extensively and often reciprocally connected with the hippocampus, neocortex, and many midbrain regions. Functionally, the RSC is an important hub of the default-mode network. This endowment, with vast anatomical and functional connections, positions the RSC to play an important role in episodic memory, spatial and contextual learning, sensory-cognitive activities, and multi-modal sensory information processing and integration. Additionally, RSC dysfunction has been reported in cases of cognitive decline, particularly in Alzheimer's disease and stroke. We review the literature to examine whether the RSC can act as a cortical marker of persistent cognitive dysfunction after traumatic brain injury (TBI). Because the RSC is easily accessible at the brain's surface using in vivo techniques, we argue that studying RSC network activity post-TBI can shed light into the mechanisms of less-accessible brain regions, such as the hippocampus. There is a fundamental gap in the TBI field about the microscale alterations occurring post-trauma, and by studying the RSC's neuronal activity at the cellular level we will be able to design better therapeutic tools. Understanding how neuronal activity and interactions produce normal and abnormal activity in the injured brain is crucial to understanding cognitive dysfunction. By using this approach, we expect to gain valuable insights to better understand brain disorders like TBI.
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Affiliation(s)
- Helen Motanis
- UCLA Brain Injury Research Center, Department of Neurosurgery, Geffen Medical School, UCLA Mattel Children's Hospital, University of California at Los Angeles, Los Angeles, California, USA
| | - Laila N. Khorasani
- UCLA Brain Injury Research Center, Department of Neurosurgery, Geffen Medical School, UCLA Mattel Children's Hospital, University of California at Los Angeles, Los Angeles, California, USA
| | - Christopher C. Giza
- UCLA Brain Injury Research Center, Department of Neurosurgery, Geffen Medical School, UCLA Mattel Children's Hospital, University of California at Los Angeles, Los Angeles, California, USA
- Department of Pediatrics, UCLA Mattel Children's Hospital, University of California at Los Angeles, Los Angeles, California, USA
| | - Neil G. Harris
- UCLA Brain Injury Research Center, Department of Neurosurgery, Geffen Medical School, UCLA Mattel Children's Hospital, University of California at Los Angeles, Los Angeles, California, USA
- Intellectual Development and Disabilities Research Center, UCLA Mattel Children's Hospital, University of California at Los Angeles, Los Angeles, California, USA
- *Address correspondence to: Neil G. Harris, PhD, Department of Neurosurgery, University of California at Los Angeles, Wasserman Building, 300 Stein Plaza, Room 551, Los Angeles, CA 90095, USA;
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Huo BB, Zheng MX, Hua XY, Shen J, Wu JJ, Xu JG. Metabolic Brain Network Analysis With 18F-FDG PET in a Rat Model of Neuropathic Pain. Front Neurol 2021; 12:566119. [PMID: 34276529 PMCID: PMC8284720 DOI: 10.3389/fneur.2021.566119] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 05/05/2021] [Indexed: 11/16/2022] Open
Abstract
Neuropathic pain has been found to be related to profound reorganization in the function and structure of the brain. We previously demonstrated changes in local brain activity and functional/metabolic connectivity among selected brain regions by using neuroimaging methods. The present study further investigated large-scale metabolic brain network changes in 32 Sprague–Dawley rats with right brachial plexus avulsion injury (BPAI). Graph theory was applied in the analysis of 2-deoxy-2-[18F] fluoro-D-glucose (18F-FDG) PET images. Inter-subject metabolic networks were constructed by calculating correlation coefficients. Global and nodal network properties were calculated and comparisons between pre- and post-BPAI (7 days) status were conducted. The global network properties (including global efficiency, local efficiency and small-world index) and nodal betweenness centrality did not significantly change for all selected sparsity thresholds following BPAI (p > 0.05). As for nodal network properties, both nodal degree and nodal efficiency measures significantly increased in the left caudate putamen, left medial prefrontal cortex, and right caudate putamen (p < 0.001). The right entorhinal cortex showed a different nodal degree (p < 0.05) but not nodal efficiency. These four regions were selected for seed-based metabolic connectivity analysis. Strengthened connectivity was found among these seeds and distributed brain regions including sensorimotor area, cognitive area, and limbic system, etc. (p < 0.05). Our results indicated that the brain had the resilience to compensate for BPAI-induced neuropathic pain. However, the importance of bilateral caudate putamen, left medial prefrontal cortex, and right entorhinal cortex in the network was strengthened, as well as most of their connections with distributed brain regions.
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Affiliation(s)
- Bei-Bei Huo
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Mou-Xiong Zheng
- Department of Traumatology and Orthopedics, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xu-Yun Hua
- Department of Traumatology and Orthopedics, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jun Shen
- Department of Orthopedics, Guanghua Hospital of Integrative Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jia-Jia Wu
- Department of Rehabilitation Medicine, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jian-Guang Xu
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Genaro K, Prado WA. The role of the anterior pretectal nucleus in pain modulation: A comprehensive review. Eur J Neurosci 2021; 54:4358-4380. [PMID: 33909941 DOI: 10.1111/ejn.15255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 04/16/2021] [Accepted: 04/18/2021] [Indexed: 11/27/2022]
Abstract
Descending pain modulation involves multiple encephalic sites and pathways that range from the cerebral cortex to the spinal cord. Behavioral studies conducted in the 1980s revealed that electrical stimulation of the pretectal area causes antinociception dissociation from aversive responses. Anatomical and physiological studies identified the anterior pretectal nucleus and its descending projections to several midbrain, pontine, and medullary structures. The anterior pretectal nucleus is morphologically divided into a dorsal part that contains a dense neuron population (pars compacta) and a ventral part that contains a dense fiber band network (pars reticulata). Connections of the two anterior pretectal nucleus parts are broad and include prominent projections to and from major encephalic systems associated with somatosensory processes. Since the first observation that acute or chronic noxious stimuli activate the anterior pretectal nucleus, it has been established that numerous mediators participate in this response through distinct pathways. Recent studies have confirmed that at least two pain inhibitory pathways are activated from the anterior pretectal nucleus. This review focuses on rodent anatomical, behavioral, molecular, and neurochemical data that have helped to identify mediators of the anterior pretectal nucleus and pathways related to its role in pain modulation.
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Affiliation(s)
- Karina Genaro
- Department of Anesthesiology, University of California, Irvine, CA, USA
| | - Wiliam A Prado
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil
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Brain orchestration of pregnancy and maternal behavior in mice: A longitudinal morphometric study. Neuroimage 2021; 230:117776. [PMID: 33516895 DOI: 10.1016/j.neuroimage.2021.117776] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 01/10/2023] Open
Abstract
Reproduction induces changes within the brain to prepare for gestation and motherhood. However, the dynamic of these central changes and their relationships with the development of maternal behavior remain poorly understood. Here, we describe a longitudinal morphometric neuroimaging study in female mice between pre-gestation and weaning, using new magnetic resonance imaging (MRI) resources comprising a high-resolution brain template, its associated tissue priors (60-µm isotropic resolution) and a corresponding mouse brain atlas (1320 regions of interest). Using these tools, we observed transient hypertrophies not only within key regions controlling gestation and maternal behavior (medial preoptic area, bed nucleus of the stria terminalis), but also in the amygdala, caudate nucleus and hippocampus. Additionally, unlike females exhibiting lower levels of maternal care, highly maternal females developed transient hypertrophies in somatosensory, entorhinal and retrosplenial cortices among other regions. Therefore, coordinated and transient brain modifications associated with maternal performance occurred during gestation and lactation.
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Nasseef MT, Ma W, Singh JP, Dozono N, Lançon K, Séguéla P, Darcq E, Ueda H, Kieffer BL. Chronic generalized pain disrupts whole brain functional connectivity in mice. Brain Imaging Behav 2021; 15:2406-2416. [PMID: 33428113 DOI: 10.1007/s11682-020-00438-9] [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] [Accepted: 12/20/2020] [Indexed: 12/30/2022]
Abstract
Fibromyalgia (FM) is a generalized chronic pain condition whose pathophysiology is poorly understood, and both basic and translational research are needed to advance the field. Here we used the Sluka model to test whether FM-like pain in mice would produce detectable brain modifications using resting-state (rs) functional Magnetic Resonance Imaging (fMRI). Mice received intramuscular acid saline treatment, images were acquired at 7 T 5 days post-treatment, and pain thresholds tested 3 weeks post-scanning. Data-driven Independent Component Analysis revealed significant reduction of functional connectivity (FC) across several component pairs, with major changes for the Retrosplenial cortex (RSP) central to the default mode network, and to a lesser extent the Periaqueductal gray (PAG), a key pain processing area. Seed-to-seed analysis focused on 14 pain-related areas showed strongest FC reduction for RSP with several cortical areas (somatosensory, prefrontal and insular), and for PAG with both cortical (somatosensory) and subcortical (habenula, thalamus, parabrachial nucleus) areas. RSP-PAG FC was also reduced, and this decreased FC tended to be positively correlated with pain levels at individual subject level. Finally, seed-voxelwise analysis focused on PAG confirmed seed-to-seed findings and, also detected reduced PAG FC with the anterior cingulate cortex, increasingly studied in aversive pain effects. In conclusion, FM-like pain triggers FC alterations in the mouse, which are detected by rs-fMRI and are reminiscent of some human findings. The study reveals the causal fingerprint of FM-like pain in rodents, and indicates that both RSP and PAG connectional patterns could be suitable biomarkers, with mechanistic and translational value, for further investigations.
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Affiliation(s)
- Md Taufiq Nasseef
- Douglas Hospital Research Center, Department of Psychiatry, School of Medicine, McGill University, Montreal, Quebec, Canada
| | - Weiya Ma
- Douglas Hospital Research Center, Department of Psychiatry, School of Medicine, McGill University, Montreal, Quebec, Canada
| | - Jai Puneet Singh
- Douglas Hospital Research Center, Department of Psychiatry, School of Medicine, McGill University, Montreal, Quebec, Canada
| | - Naoki Dozono
- Department of Molecular Pharmacology, Kyoto University Graduate School of Pharmaceutical Sciences, Kyoto, 606-8501, Japan
| | - Kevin Lançon
- Montreal Neurological institute, Department of Neurology & Neurosurgery, the Alan Edwards Centre for Research on Pain, Montreal Neurological Institute, Dept. Neurology & Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Philippe Séguéla
- Montreal Neurological institute, Department of Neurology & Neurosurgery, the Alan Edwards Centre for Research on Pain, Montreal Neurological Institute, Dept. Neurology & Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Emmanuel Darcq
- Douglas Hospital Research Center, Department of Psychiatry, School of Medicine, McGill University, Montreal, Quebec, Canada
| | - Hiroshi Ueda
- Department of Molecular Pharmacology, Kyoto University Graduate School of Pharmaceutical Sciences, Kyoto, 606-8501, Japan
| | - Brigitte L Kieffer
- Douglas Hospital Research Center, Department of Psychiatry, School of Medicine, McGill University, Montreal, Quebec, Canada. .,Douglas Hospital Research Center, Perry Pavilion Room E-3317.1, 6875 boulevard LaSalle, Montreal, Quebec, H4H 1R3, Canada.
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10
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Barrière DA, Boumezbeur F, Dalmann R, Cadeddu R, Richard D, Pinguet J, Daulhac L, Sarret P, Whittingstall K, Keller M, Mériaux S, Eschalier A, Mallet C. Paracetamol is a centrally acting analgesic using mechanisms located in the periaqueductal grey. Br J Pharmacol 2020; 177:1773-1792. [PMID: 31734950 DOI: 10.1111/bph.14934] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 10/01/2019] [Accepted: 10/24/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND AND PURPOSE We previously demonstrated that paracetamol has to be metabolised in the brain by fatty acid amide hydrolase enzyme into AM404 (N-(4-hydroxyphenyl)-5Z,8Z,11Z,14Z-eicosatetraenamide) to activate CB1 receptors and TRPV1 channels, which mediate its analgesic effect. However, the brain mechanisms supporting paracetamol-induced analgesia remain unknown. EXPERIMENTAL APPROACH The effects of paracetamol on brain function in Sprague-Dawley rats were determined by functional MRI. Levels of neurotransmitters in the periaqueductal grey (PAG) were measured using in vivo 1 H-NMR and microdialysis. Analgesic effects of paracetamol were assessed by behavioural tests and challenged with different inhibitors, administered systemically or microinjected in the PAG. KEY RESULTS Paracetamol decreased the connectivity of major brain structures involved in pain processing (insula, somatosensory cortex, amygdala, hypothalamus, and the PAG). This effect was particularly prominent in the PAG, where paracetamol, after conversion to AM404, (a) modulated neuronal activity and functional connectivity, (b) promoted GABA and glutamate release, and (c) activated a TRPV1 channel-mGlu5 receptor-PLC-DAGL-CB1 receptor signalling cascade to exert its analgesic effects. CONCLUSIONS AND IMPLICATIONS The elucidation of the mechanism of action of paracetamol as an analgesic paves the way for pharmacological innovations to improve the pharmacopoeia of analgesic agents.
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Affiliation(s)
- David André Barrière
- Université Clermont Auvergne, INSERM, CHU, NEURO-DOL Basics and Clinical Pharmacology of Pain, Clermont-Ferrand, France.,Analgesia Institute, Faculty of Medicine, Clermont-Ferrand, France.,NeuroSpin, CEA, Université Paris-Saclay, Gif-sur-Yvette, France
| | | | - Romain Dalmann
- Université Clermont Auvergne, INSERM, CHU, NEURO-DOL Basics and Clinical Pharmacology of Pain, Clermont-Ferrand, France.,Analgesia Institute, Faculty of Medicine, Clermont-Ferrand, France
| | - Roberto Cadeddu
- Université Clermont Auvergne, INSERM, CHU, NEURO-DOL Basics and Clinical Pharmacology of Pain, Clermont-Ferrand, France.,Analgesia Institute, Faculty of Medicine, Clermont-Ferrand, France
| | - Damien Richard
- Université Clermont Auvergne, INSERM, CHU, NEURO-DOL Basics and Clinical Pharmacology of Pain, Clermont-Ferrand, France.,Analgesia Institute, Faculty of Medicine, Clermont-Ferrand, France
| | - Jérémy Pinguet
- Université Clermont Auvergne, INSERM, CHU, NEURO-DOL Basics and Clinical Pharmacology of Pain, Clermont-Ferrand, France.,Analgesia Institute, Faculty of Medicine, Clermont-Ferrand, France
| | - Laurence Daulhac
- Université Clermont Auvergne, INSERM, CHU, NEURO-DOL Basics and Clinical Pharmacology of Pain, Clermont-Ferrand, France.,Analgesia Institute, Faculty of Medicine, Clermont-Ferrand, France
| | - Philippe Sarret
- Département de Physiologie et Biophysique/Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Kevin Whittingstall
- Département de Radiologie Diagnostique, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Matthieu Keller
- UMR Physiologie de la Reproduction et des Comportements, INRA/CNRS/Université de Tours/IFCE, Nouzilly, France
| | | | - Alain Eschalier
- Université Clermont Auvergne, INSERM, CHU, NEURO-DOL Basics and Clinical Pharmacology of Pain, Clermont-Ferrand, France.,Analgesia Institute, Faculty of Medicine, Clermont-Ferrand, France
| | - Christophe Mallet
- Université Clermont Auvergne, INSERM, CHU, NEURO-DOL Basics and Clinical Pharmacology of Pain, Clermont-Ferrand, France.,Analgesia Institute, Faculty of Medicine, Clermont-Ferrand, France
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