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Jiang X, Kuang H, Lv H, Xiong J, Li J, Hong S, Yan YI, Gu L, Jiang J. Aberrant functional and causal connectivity of the amygdala in herpes zoster and post-herpetic neuralgia patients. Br J Radiol 2023; 96:20230338. [PMID: 37750852 PMCID: PMC10646639 DOI: 10.1259/bjr.20230338] [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: 04/15/2023] [Revised: 07/08/2023] [Accepted: 08/10/2023] [Indexed: 09/27/2023] Open
Abstract
OBJECTIVE Resting-state functional magnetic resonance imaging (rs-fMRI) and Granger causality analysis (GCA) were used to observe the characteristics of amygdala and whole-brain effect connections in patients with herpes zoster (HZ) and post-herpetic neuralgia (PHN) and to determine their relationship with clinical features. METHODS Rs-fMRI scans were performed on 50 HZ; 50 PHN; and 50 age-, sex- and education-year-matched healthy controls (HCs). Bilateral amygdala subregions were used as seeds for functional connectivity (FC). GCA was used to analyze the effective connection of brain regions that were significantly different among groups. Then, the correlation between FC, and GCA values and clinical indices was investigated. RESULTS PHN had impaired FC between the amygdala subregion with the putamen, cortex, anterior cingulate cortex (ACC) to HCs and reduced FC of medial amygdala (MeA) with the parieto-occipital lobe and motor cortex to HZ; HZ had reduced FC of the lateral amygdala (LA) with the insula to HCs. GCA values from the bilateral LA to the bilateral ACC, left MeA to the bilateral ACC and left putamen, and right ACC to the bilateral MeA were reduced in PHN patients compared to HCs. Compared with HCs, the GCA values from the left MeA to the left ACC and right putamen were reduced in HZ. The GCA values from the amygdala subregion to the ACC were positively correlated with HAMA or HAMD scores in PHN. CONCLUSION PHN showed reduced FC between the amygdala subregions and cortico-putamen and decreased effective connectivity from the amygdala subregion to the ACC and putamen. ADVANCES IN KNOWLEDGE HZ and PHN patients had significant changes in effective connectivity in brain regions, including diverse functional areas emanating from and projecting to the amygdala. The current findings will provide a new perspective for understanding the neuropathophysiological mechanism HZ and PHN.
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Affiliation(s)
| | | | | | | | | | | | - YI Yan
- Department of Pain, The First Affiliated Hospital, Nanchang University, Nanchang, China
| | - Lili Gu
- Department of Pain, The First Affiliated Hospital, Nanchang University, Nanchang, China
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Arthurs JW, Pauli JL, Palmiter RD. Activation of Parabrachial Tachykinin 1 Neurons Counteracts Some Behaviors Mediated by Parabrachial Calcitonin Gene-related Peptide Neurons. Neuroscience 2023; 517:105-116. [PMID: 36898496 PMCID: PMC10103625 DOI: 10.1016/j.neuroscience.2023.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 02/16/2023] [Accepted: 03/03/2023] [Indexed: 03/11/2023]
Abstract
Many threats activate parabrachial neurons expressing calcitonin gene-related peptide (CGRPPBN) which transmit alarm signals to forebrain regions. Most CGRPPBN neurons also express tachykinin 1 (Tac1), but there are also Tac1-expressing neurons in the PBN that do not express CGRP (Tac1+;CGRP- neurons). Chemogenetic or optogenetic activation of all Tac1PBN neurons in mice elicited many physiological/behavioral responses resembling the activation of CGRPPBN neurons, e.g., anorexia, jumping on a hot plate, avoidance of photostimulation; however, two key responses opposed activation of CGRPPBN neurons. Activating Tac1PBN neurons did not produce conditioned taste aversion and it elicited dynamic escape behaviors rather than freezing. Activating Tac1+;CGRP- neurons, using an intersectional genetic targeting approach, resembles activating all Tac1PBN neurons. These results reveal that activation of Tac1+;CGRP- neurons can suppress some functions attributed to the CGRPPBN neurons, which provides a mechanism to bias behavioral responses to threats.
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Affiliation(s)
- Joe W Arthurs
- Department of Biochemistry, University of Washington, Seattle 98195, United States; Howard Hughes Medical Institute, University of Washington, Seattle 98195, United States
| | - Jordan L Pauli
- Department of Biochemistry, University of Washington, Seattle 98195, United States; Howard Hughes Medical Institute, University of Washington, Seattle 98195, United States
| | - Richard D Palmiter
- Department of Biochemistry, University of Washington, Seattle 98195, United States; Howard Hughes Medical Institute, University of Washington, Seattle 98195, United States.
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Xu R, Zhang YW, Gu Q, Yuan TJ, Fan BQ, Xia JM, Wu JH, Xia Y, Li WX, Han Y. Alteration of neural activity and neuroinflammatory factors in the insular cortex of mice with corneal neuropathic pain. GENES, BRAIN, AND BEHAVIOR 2023; 22:e12842. [PMID: 36889983 PMCID: PMC10067426 DOI: 10.1111/gbb.12842] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 01/20/2023] [Accepted: 01/23/2023] [Indexed: 03/10/2023]
Abstract
Dry eye disease (DED) affects nearly 55% of people worldwide; several studies have proposed that central sensitization and neuroinflammation may contribute to the developing corneal neuropathic pain of DED, while the underlying mechanisms of this contribution remain to be investigated. Excision of extra orbital lacrimal glands established the dry eye model. Corneal hypersensitivity was examined through chemical and mechanical stimulation, and open field test measured the anxiety levels. Restingstate fMRI is a method of functional magnetic resonance imaging (rs-fMRI) was performed for anatomical involvement of the brain regions. The amplitude of low-frequency fluctuation (ALFF) determined brain activity. Immunofluorescence testing and Quantitative real-time polymerase chain reaction were also performed to further validate the findings. Compared with the Sham group, ALFF signals in the supplemental somatosensory area, secondary auditory cortex, agranular insular cortex, temporal association areas, and ectorhinal cortex brain areas were increased in the dry eye group. This change of ALFF in the insular cortex was linked with the increment in corneal hypersensitivity (p < 0.01), c-Fos (p < 0.001), brain-derived neurotrophic factor (p < 0.01), TNF-α, IL-6, and IL-1β (p < 0.05). In contrast, IL-10 levels (p < 0.05) decreased in the dry eye group. DED-induced corneal hypersensitivity and upregulation of inflammatory cytokines could be blocked by insular cortex injection of Tyrosine Kinase receptor B agonist cyclotraxin-B (p < 0.01) without affecting anxiety levels. Our study reveals that the functional activity of the brain associated with corneal neuropathic pain and neuroinflammation in the insular cortex might contribute to dry eye-related corneal neuropathic pain.
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Affiliation(s)
- Rui Xu
- Department of Anesthesiology, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Yu-Wen Zhang
- Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, China
| | - Qing Gu
- Department of Anesthesia, Children's Hospital of Fudan University, Shanghai, China
| | - Tian-Jie Yuan
- Department of Anesthesiology, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Bing-Qian Fan
- Department of Anesthesiology, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Jun-Ming Xia
- Department of Anesthesiology, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Jin-Hong Wu
- Department of Anesthesiology, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Ying Xia
- Department of Anesthesiology, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Wen-Xian Li
- Department of Anesthesiology, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Yuan Han
- Department of Anesthesiology, Eye and ENT Hospital, Fudan University, Shanghai, China
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Huang M, Wang G, Lin Y, Guo Y, Ren X, Shao J, Cao J, Zang W, Li Z. Dopamine receptor D2, but not D1, mediates the reward circuit from the ventral tegmental area to the central amygdala, which is involved in pain relief. Mol Pain 2022; 18:17448069221145096. [PMID: 36464669 PMCID: PMC9742700 DOI: 10.1177/17448069221145096] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Pain involves both sensory and affective dimensions. The amygdala is a key player in linking nociceptive stimuli to negative emotional behaviors or affective states. Relief of pain is rewarding and activates brain reward circuits. Whether the reward circuit from the ventral tegmental area (VTA) to the central amygdala (CeA) is involved in pain relief remains unexplored. Using a model of experimental postsurgical pain, we found that pain relief elicited conditioned place preference (CPP), activated CeA-projecting dopaminergic cells in the VTA, and decreased dopaminergic D2 receptor expression in the CeA. Activation of the VTA-CeA neural pathway using optogenetic approaches relieved incisional pain. Administration of a D2 receptor agonist reversed the pain relief elicited by light-induced activation of the VTA-CeA pathway. These findings indicate that the VTA-CeA circuit is involved in pain relief in mice via dopamine receptor D2 in the CeA.
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Affiliation(s)
- Minjie Huang
- Department of Human Anatomy, Basic Medical Sciences College, Zhengzhou University, Zhengzhou, Henan Province, China,Department of Human Anatomy, Basic Medical Sciences College, Sanquan College of Xinxiang Medical University, Xinxiang, China
| | - Guoqing Wang
- Department of Human Anatomy, Basic Medical Sciences College, Zhengzhou University, Zhengzhou, Henan Province, China,Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
| | - Yazhou Lin
- Department of Human Anatomy, Basic Medical Sciences College, Zhengzhou University, Zhengzhou, Henan Province, China
| | - Yanyan Guo
- Department of Human Anatomy, Basic Medical Sciences College, Zhengzhou University, Zhengzhou, Henan Province, China
| | - Xiuhua Ren
- Department of Human Anatomy, Basic Medical Sciences College, Zhengzhou University, Zhengzhou, Henan Province, China
| | - Jinping Shao
- Department of Human Anatomy, Basic Medical Sciences College, Zhengzhou University, Zhengzhou, Henan Province, China
| | - Jing Cao
- Department of Human Anatomy, Basic Medical Sciences College, Zhengzhou University, Zhengzhou, Henan Province, China
| | - Weidong Zang
- Department of Human Anatomy, Basic Medical Sciences College, Zhengzhou University, Zhengzhou, Henan Province, China
| | - Zhihua Li
- Department of Human Anatomy, Basic Medical Sciences College, Zhengzhou University, Zhengzhou, Henan Province, China,Zhihua Li, Department of Human Anatomy, Basic Medical Sciences College, Zhengzhou University, 1 Science Road, Zhengzhou 450001, Henan Province, China.
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Lee GJ, Kim YJ, Shim SW, Lee K, Oh SB. Anterior insular-nucleus accumbens pathway controls refeeding-induced analgesia under chronic inflammatory pain condition. Neuroscience 2022; 495:58-73. [DOI: 10.1016/j.neuroscience.2022.05.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 04/21/2022] [Accepted: 05/19/2022] [Indexed: 10/18/2022]
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