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Li D, Du H, Qu ST, Wu JL, Li YC, Xu QY, Chen X, Dai XX, Xu JT, Wang Q, Xu GY. Thalamic Nucleus Reuniens Glutamatergic Neurons Mediate Colorectal Visceral Pain in Mice via 5-HT 2B Receptors. Neurosci Bull 2024; 40:1421-1433. [PMID: 38739251 PMCID: PMC11422542 DOI: 10.1007/s12264-024-01207-0] [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: 10/27/2023] [Accepted: 12/26/2023] [Indexed: 05/14/2024] Open
Abstract
Irritable bowel syndrome (IBS) is a common functional bowel disorder characterized by abdominal pain and visceral hypersensitivity. Reducing visceral hypersensitivity is the key to effectively relieving abdominal pain in IBS. Increasing evidence has confirmed that the thalamic nucleus reuniens (Re) and 5-hydroxytryptamine (5-HT) neurotransmitter system play an important role in the development of colorectal visceral pain, whereas the exact mechanisms remain largely unclear. In this study, we found that high expression of the 5-HT2B receptors in the Re glutamatergic neurons promoted colorectal visceral pain. Specifically, we found that neonatal maternal deprivation (NMD) mice exhibited visceral hyperalgesia and enhanced spontaneous synaptic transmission in the Re brain region. Colorectal distension (CRD) stimulation induced a large amount of c-Fos expression in the Re brain region of NMD mice, predominantly in glutamatergic neurons. Furthermore, optogenetic manipulation of glutamatergic neuronal activity in the Re altered colorectal visceral pain responses in CON and NMD mice. In addition, we demonstrated that 5-HT2B receptor expression on the Re glutamatergic neurons was upregulated and ultimately promoted colorectal visceral pain in NMD mice. These findings suggest a critical role of the 5HT2B receptors on the Re glutamatergic neurons in the regulation of colorectal visceral pain.
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Affiliation(s)
- Di Li
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, 215123, China
| | - Han Du
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, 215123, China
| | - Shu-Ting Qu
- Department of Gastroenterology, The First Affiliated Hospital of Soochow University, Suzhou, 215123, China
| | - Jing-Lai Wu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, 215123, China
| | - Yong-Chang Li
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, 215123, China
| | - Qi-Ya Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, 215123, China
| | - Xia Chen
- Department of Anesthesiology, Children's Hospital of Soochow University, Suzhou, 215123, China
| | - Xiao-Xuan Dai
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, 215123, China
| | - Ji-Tian Xu
- Department of Physiology and Neurobiology, College of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China
| | - Qian Wang
- Department of Anesthesiology, Children's Hospital of Soochow University, Suzhou, 215123, China.
| | - Guang-Yin Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, 215123, China.
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Li YC, Zhang FC, Li D, Weng RX, Yu Y, Gao R, Xu GY. Distinct circuits and molecular targets of the paraventricular hypothalamus decode visceral and somatic pain. Neuron 2024:S0896-6273(24)00648-2. [PMID: 39326407 DOI: 10.1016/j.neuron.2024.08.024] [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: 03/27/2024] [Revised: 07/17/2024] [Accepted: 08/29/2024] [Indexed: 09/28/2024]
Abstract
Visceral and somatic pain serve as protective mechanisms against external threats. Accumulated evidence has confirmed that the paraventricular hypothalamus (PVH) plays an important role in the perception of visceral and somatic pain, whereas the exact neural pathways and molecules distinguishing them remain unclear. Here, we report distinct neuronal ensembles within the PVH dedicated to processing visceral and somatic pain signals. An essential discovery is the distinct expression of P2X3R and VIPR2 in visceral and somatic pain-activated PVH neuronal ensembles. Furthermore, visceral pain- and somatic pain-responsive PVH neuronal ensembles project to specific downstream regions, the ventral part of the lateral septal nucleus (LSV) and the caudal part of the zona incerta (ZIC), respectively. These findings unveil that the PVH acts as a pain sorting center that distinctly processes visceral and somatic pain, identifying potential molecular targets for specific pain processing and providing a new framework for comprehending how the brain processes nociceptive information.
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Affiliation(s)
- Yong-Chang Li
- Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou 215123, Jiangsu, P.R. China; Translational Medicine Center, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou 215123, Jiangsu, P.R. China
| | - Fu-Chao Zhang
- Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou 215123, Jiangsu, P.R. China
| | - Di Li
- Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou 215123, Jiangsu, P.R. China
| | - Rui-Xia Weng
- Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou 215123, Jiangsu, P.R. China; Department of Gastroenterology, The First Affiliated Hospital of Soochow University, Suzhou 215006, P.R. China
| | - Yang Yu
- Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou 215123, Jiangsu, P.R. China
| | - Rong Gao
- Translational Medicine Center, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou 215123, Jiangsu, P.R. China.
| | - Guang-Yin Xu
- Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou 215123, Jiangsu, P.R. China.
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3
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Guo S, Wang Y, Duan Q, Gu W, Fu Q, Ma Z, Ruan J. Activation of EphrinB2/EphB2 signaling in the spine cord alters glia-neuron interactions in mice with visceral hyperalgesia following maternal separation. Front Pharmacol 2024; 15:1463339. [PMID: 39290870 PMCID: PMC11405339 DOI: 10.3389/fphar.2024.1463339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2024] [Accepted: 08/20/2024] [Indexed: 09/19/2024] Open
Abstract
Background Sress early in life has been linked to visceral hyperalgesia and associated functional gastrointestinal disorders. In a mouse model of visceral hyperalgesia, we investigated whether the EphB2 receptor and its EphrinB2 ligand in spinal cord contribute to dysregulation of glia-neuron interactions. Methods An established mouse model of stress due to maternal separation (MS). Pups were separated from their mothers for 14 days during early development, then analyzed several weeks later in terms of visceral sensitivity based on the abdominal withdrawal reflex score and in terms of expression of c-fos, EphrinB2, EphB2, and phosphorylated MAP kinases (ERK, p38, JNK). Results Visceral hyperalgesia due to MS upregulated EphB2, EphrinB2 and c-fos in the spinal cord, and c-fos levels positively correlated with those of EphB2 and EphrinB2. Spinal astrocytes, microglia, and neurons showed upregulation of EphB2, EphrinB2 and phosphorylated MAP kinases. Blocking EphrinB2/EphB2 signaling in MS mice reduced visceral sensitivity, activation of neurons and glia, and phosphorylation of NMDA receptor. Activating EphrinB2/EphB2 signaling in unstressed mice induced visceral hyperalgesia, upregulation of c-fos, and activation of NMDA receptor similar to maternal separation. Conclusion The stress of MS during early development may lead to visceral hyperalgesia by upregulating EphrinB2/EphB2 in the spinal cord and thereby altering neuron-glia interactions.
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Affiliation(s)
- Shufen Guo
- Department of Anesthesiology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Yu Wang
- Department of Anesthesiology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
- Department of Anesthesiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Qingling Duan
- Department of Anesthesiology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Wei Gu
- Department of Anesthesiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Qun Fu
- Department of Anesthesiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Zhengliang Ma
- Department of Anesthesiology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
- Department of Anesthesiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Jiaping Ruan
- Department of Anesthesiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
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Lv T, Li G, Zhao C, Ma J, Zhang F, Zhao M, Liu H, Wu H, Li K, Weng Z. P2X7 and P2Y 1 receptors in DRG mediate electroacupuncture to inhibit peripheral sensitization in rats with IBS visceral pain. Purinergic Signal 2024:10.1007/s11302-024-10028-9. [PMID: 38922475 DOI: 10.1007/s11302-024-10028-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 06/03/2024] [Indexed: 06/27/2024] Open
Abstract
Although multiple purinergic receptors mediate the analgesic effects of acupuncture, it remains unclear whether there is mutual interaction between purinergic receptors to jointly mediate the electroacupuncture inhibition of peripheral sensitization in visceral pain. Visceral hypersensitivity was induced by intracolonic 2,4,6-trinitrobenzene sulfonic acid (TNBS) in rat. The antinociception effect of electroacupuncture on visceral pain was evaluated by morphology, behaviors, neuroelectrophysiology and molecular biology techniques. After labeling the colon-related primary sensory neurons with neural retrograde tracer and employing neuropharmacology, neuroelectrophysiology, and molecular biotechnology, the mechanisms of P2X7R, P2Y1R, and P2X3R in colon-related dorsal root ganglion (DRG) neurons alleviating visceral hypersensitivity of irritable bowel syndrome (IBS) by electroacupuncture at Zusanli and Sanyinjiao acupoints.were elucidated from the perspective of peripheral sensitization. Electroacupuncture significantly inhibited TNBS-induced colonic hypersensitivity in rats with IBS, and Satellite Glial Cells (SGCs) in DRG were found to be involved in electroacupuncture-mediated regulation of the electrophysiological properties of neurons. P2X7R was found to play a pain-inducing role in IBS visceral hypersensitivity by affecting P2X3R, and electroacupuncture exerted an analgesic effect by inhibiting P2X7R activation. P2Y1R was found to play an analgesic role in the process of visceral pain, mediating electroacupuncture to relieve visceral hypersensitivity. P2Y1R relieved visceral pain by inhibiting P2X3R in neurons associated with nociception, with P2X7R identified as upstream of P2Y1R up-regulation by electroacupuncture. Our study suggests that the P2X7R → P2Y1R → P2X3R inhibitory pathway in DRG mediates the inhibition of peripheral sensitization by electroacupuncture in rats with IBS visceral hypersensitivity.
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Affiliation(s)
- Tingting Lv
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China
- Shanghai Research Institute of Acupuncture and Meridian, Shanghai, 200030, China
| | - Guona Li
- Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Chen Zhao
- Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Jindan Ma
- Shanghai Research Institute of Acupuncture and Meridian, Shanghai, 200030, China
| | - Fang Zhang
- Shanghai Research Institute of Acupuncture and Meridian, Shanghai, 200030, China
| | - Min Zhao
- Shanghai Research Institute of Acupuncture and Meridian, Shanghai, 200030, China
| | - Huirong Liu
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China
- Shanghai Research Institute of Acupuncture and Meridian, Shanghai, 200030, China
| | - Huangan Wu
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China
- Shanghai Research Institute of Acupuncture and Meridian, Shanghai, 200030, China
| | - Kunshan Li
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China.
- Shanghai Research Institute of Acupuncture and Meridian, Shanghai, 200030, China.
| | - Zhijun Weng
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China.
- Shanghai Research Institute of Acupuncture and Meridian, Shanghai, 200030, China.
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5
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Luo HM, Ye JR, Pu FQ, Luo HL, Zhang WJ. Role and therapeutic target of P2X2/3 receptors in visceral pain. Neuropeptides 2023; 101:102355. [PMID: 37390743 DOI: 10.1016/j.npep.2023.102355] [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: 04/12/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 07/02/2023]
Abstract
Visceral pain (VP) is caused by internal organ disease. VP is involved in nerve conduction and related signaling molecules, but its specific pathogenesis has not yet been fully elucidated. Currently, there are no effective methods for treating VP. The role of P2X2/3 in VP has progressed. After visceral organs are subjected to noxious stimulation, cells release ATP, activate P2X2/3, enhance the sensitivity of peripheral receptors and the plasticity of neurons, enhance sensory information transmission, sensitize the central nervous system, and play an important role in the development of VP. However, antagonists possess the pharmacological effect of relieving pain. Therefore, in this review, we summarize the biological functions of P2X2/3 and discuss the intrinsic link between P2X2/3 and VP. Moreover, we focus on the pharmacological effects of P2X2/3 antagonists on VP therapy and provide a theoretical basis for its targeted therapy.
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Affiliation(s)
- Hong-Mei Luo
- Department of Rheumatology, The Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang City, Jiangxi province 343000, China
| | - Jia-Rong Ye
- Department of Gastrointestinal surgery, The Second Affiliated Hospital, Nanchang University, Nanchang City, Jiangxi province 343000, China
| | - Fan-Qin Pu
- Department of Rheumatology, The Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang City, Jiangxi province 343000, China
| | - Hong-Liang Luo
- Department of Rehabilitation Medicine, The Second Affiliated Hospital, Nanchang University, Nanchang City, Jiangxi province 343000, China
| | - Wen-Jun Zhang
- Department of Rehabilitation Medicine, The Second Affiliated Hospital, Nanchang University, Nanchang City, Jiangxi province 343000, China.
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6
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Qi L, Lin SH, Ma Q. Spinal VGLUT3 lineage neurons drive visceral mechanical allodynia but not sensitized visceromotor reflexes. Neuron 2023; 111:669-681.e5. [PMID: 36584681 DOI: 10.1016/j.neuron.2022.12.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 09/08/2022] [Accepted: 11/30/2022] [Indexed: 12/30/2022]
Abstract
Visceral pain is among the most prevalent and bothersome forms of chronic pain, but their transmission in the spinal cord is still poorly understood. Here, we conducted focal colorectal distention (fCRD) to drive both visceromotor responses (VMRs) and aversion. We first found that spinal CCK neurons were necessary for noxious fCRD to drive both VMRs and aversion under naive conditions. We next showed that spinal VGLUT3 neurons mediate visceral allodynia, whose ablation caused loss of aversion evoked by low-intensity fCRD in mice with gastrointestinal (GI) inflammation or spinal circuit disinhibition. Importantly, these neurons were dispensable for driving sensitized VMRs under both inflammatory and central disinhibition conditions. Anatomically, a subset of VGLUT3 neurons projected to parabrachial nuclei, whose photoactivation sufficiently generated aversion in mice with GI inflammation, without influencing VMRs. Our studies suggest the presence of different spinal substrates that transmit nociceptive versus affective dimensions of visceral sensory information.
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Affiliation(s)
- Lu Qi
- Dana-Farber Cancer Institute and Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
| | - Shing-Hong Lin
- Dana-Farber Cancer Institute and Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
| | - Qiufu Ma
- Dana-Farber Cancer Institute and Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.
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7
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Li YC, Wang Q, Li MG, Hu SF, Xu GY. A paraventricular hypothalamic nucleus input to ventral of lateral septal nucleus controls chronic visceral pain. Pain 2023; 164:625-637. [PMID: 35994589 PMCID: PMC9916060 DOI: 10.1097/j.pain.0000000000002750] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 07/14/2022] [Accepted: 07/18/2022] [Indexed: 11/25/2022]
Abstract
ABSTRACT Irritable bowel syndrome is a functional gastrointestinal disorder characterized by chronic visceral pain with complex etiology and difficult treatment. Accumulated evidence has confirmed that the sensitization of the central nervous system plays an important role in the development of visceral pain, whereas the exact mechanisms of action of the neural pathways remain largely unknown. In this study, a distinct neural circuit was identified from the paraventricular hypothalamic (PVH) to the ventral of lateral septal (LSV) region. This circuit was responsible for regulating visceral pain. In particular, the data indicated that the PVH CaMKIIα-positive neurons inputs to the LSV CaMKIIα-positive neurons were only activated by colorectal distention rather than somatic stimulations. The PVH-LSV CaMKIIα + projection pathway was further confirmed by experiments containing a viral tracer. Optogenetic inhibition of PVH CaMKIIα + inputs to LSV CaMKIIα-positive neurons suppressed visceral pain, whereas selective activation of the PVH-LSV CaMKIIα + projection evoked visceral pain. These findings suggest the critical role of the PVH-LSV CaMKIIα + circuit in regulating visceral pain.
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Affiliation(s)
- Yong-Chang Li
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China
| | - Qian Wang
- Department of Anesthesiology, Children's Hospital of Soochow University, Suzhou, China
| | - Meng-Ge Li
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China
| | - Shu-Fen Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China
| | - Guang-Yin Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China
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8
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Alam MJ, Chen JDZ. Electrophysiology as a Tool to Decipher the Network Mechanism of Visceral Pain in Functional Gastrointestinal Disorders. Diagnostics (Basel) 2023; 13:627. [PMID: 36832115 PMCID: PMC9955347 DOI: 10.3390/diagnostics13040627] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 01/27/2023] [Accepted: 02/07/2023] [Indexed: 02/11/2023] Open
Abstract
Abdominal pain, including visceral pain, is prevalent in functional gastrointestinal (GI) disorders (FGIDs), affecting the overall quality of a patient's life. Neural circuits in the brain encode, store, and transfer pain information across brain regions. Ascending pain signals actively shape brain dynamics; in turn, the descending system responds to the pain through neuronal inhibition. Pain processing mechanisms in patients are currently mainly studied with neuroimaging techniques; however, these techniques have a relatively poor temporal resolution. A high temporal resolution method is warranted to decode the dynamics of the pain processing mechanisms. Here, we reviewed crucial brain regions that exhibited pain-modulatory effects in an ascending and descending manner. Moreover, we discussed a uniquely well-suited method, namely extracellular electrophysiology, that captures natural language from the brain with high spatiotemporal resolution. This approach allows parallel recording of large populations of neurons in interconnected brain areas and permits the monitoring of neuronal firing patterns and comparative characterization of the brain oscillations. In addition, we discussed the contribution of these oscillations to pain states. In summary, using innovative, state-of-the-art methods, the large-scale recordings of multiple neurons will guide us to better understanding of pain mechanisms in FGIDs.
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Affiliation(s)
- Md Jahangir Alam
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jiande D. Z. Chen
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
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9
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Lin W, Liu Y, Zhou Y, Lin M, Liu C, Tang Y, Wu B, Lin C. Methyltransferase-like 3 modulates visceral hypersensitivity through regulating the nuclear export of circKcnk9 in YTHDC1-dependent manner. Mol Pain 2022; 18:17448069221144540. [PMID: 36443649 PMCID: PMC9730012 DOI: 10.1177/17448069221144540] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Background: Accumulating evidence shows that N6-methyladenosine (m6A) modulators contribute to the process of chronic pain. However, the exact mechanisms of m6A writers involved in visceral hypersensitivity of Irritable bowel syndrome (IBS) remain unclear. This article aimed to reveal a new mechanism for the progression of IBS. Methods: The IBS-like model was established by neonatal colorectal distention (CRD). The relationship between m6A and circKcnk9 was analyzed by bioinformatics, immunofluorescence and RNA fluorescence in situ hybridization (FISH) assays. Visceral hypersensitivity was assessed based on the electromyography (EMG) response of the abdominal external oblique muscle to CRD. In vivo and in vitro studies (including EMG stereotactic infusion, Western blot and qRT-PCR) were utilized to explore the biological functions of related indicators. The bioinformatics, RIP experiments and RNA pull-down assays were used to explore the potential molecular mechanisms. Results: We identified that neonatal CRD increased the level of the m6A via methyltransferase-like 3 (METTL3) in the hippocampal neurons. Subsequently, knockdown of METTL3 could alleviate visceral hypersensitivity in IBS-like rats. By contrast, overexpression of METTL3 could induce visceral hypersensitivity and activate hippocampal neurons in control rats. Moreover, YTHDC1, the only m6A-associated protein predicted by bioinformatics to bind to circKcnk9, modulated visceral hypersensitivity through regulating the nuclear export of circKcnk9 in an m6A-dependent manner. Notably, FISH data suggested that the increased nuclear staining of circKcnk9 caused by siYTHDC1 could be recovered by overexpression of YTHDC1 wild type (WT) but not YTHDC1 negative control (NC) in PC12 cells. Conclusions: Our findings reveal a new regulatory mechanism in progress of IBS, that is, METTL3 modulates visceral hypersensitivity through regulating the nuclear export of circKcnk9 in YTHDC1-dependent manner.
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Affiliation(s)
- Wei Lin
- Pain Research Institute, Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Yuan Liu
- Pain Research Institute, Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China,Cancer Research Center Nantong, the Affiliated Tumor Hospital of Nantong University, Nantong, China
| | - Yifei Zhou
- Pain Research Institute, Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Mengying Lin
- Pain Research Institute, Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Congxu Liu
- Pain Research Institute, Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Ying Tang
- Pain Research Institute, Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China,Ying Tang, Pain Research Institute, Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China.
| | - Bin Wu
- Department of Pediatrics, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China,Bin Wu, Department of Pediatrics, the First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, China.
| | - Chun Lin
- Pain Research Institute, Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China,Chun Lin, Pain Research Institute, Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China.
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10
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Astrocytes in Chronic Pain: Cellular and Molecular Mechanisms. Neurosci Bull 2022; 39:425-439. [PMID: 36376699 PMCID: PMC10043112 DOI: 10.1007/s12264-022-00961-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 06/17/2022] [Indexed: 11/15/2022] Open
Abstract
AbstractChronic pain is challenging to treat due to the limited therapeutic options and adverse side-effects of therapies. Astrocytes are the most abundant glial cells in the central nervous system and play important roles in different pathological conditions, including chronic pain. Astrocytes regulate nociceptive synaptic transmission and network function via neuron–glia and glia–glia interactions to exaggerate pain signals under chronic pain conditions. It is also becoming clear that astrocytes play active roles in brain regions important for the emotional and memory-related aspects of chronic pain. Therefore, this review presents our current understanding of the roles of astrocytes in chronic pain, how they regulate nociceptive responses, and their cellular and molecular mechanisms of action.
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11
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Yuan ZL, Liu XD, Zhang ZX, Li S, Tian Y, Xi K, Cai J, Yang XM, Liu M, Xing GG. Activation of GDNF-ERK-Runx1 signaling contributes to P2X3R gene transcription and bone cancer pain. iScience 2022; 25:104936. [PMID: 36072549 PMCID: PMC9441333 DOI: 10.1016/j.isci.2022.104936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 07/15/2022] [Accepted: 08/10/2022] [Indexed: 11/24/2022] Open
Abstract
Bone cancer pain is a common symptom in cancer patients with bone metastases and its underlying mechanisms remain unknown. Here, we report that Runx1 directly upregulates the transcriptional activity of P2X3 receptor (P2X3R) gene promoter in PC12 cells. Knocking down Runx1 in dorsal root ganglion (DRG) neurons suppresses the functional upregulation of P2X3R, attenuates neuronal hyperexcitability and pain hypersensitivity in tumor-bearing rats, whereas overexpressing Runx1 promotes P2X3R gene transcription in DRG neurons, induces neuronal hyperexcitability and pain hypersensitivity in naïve rats. Activation of GDNF-GFRα1-Ret-ERK signaling is required for Runx1-mediated P2X3R gene transcription in DRG neurons, and contributes to neuronal hyperexcitability and pain hypersensitivity in tumor-bearing rats. These findings indicate that the Runx1-mediated P2X3R gene transcription resulted from activation of GDNF-GFRα1-Ret-ERK signaling contributes to the sensitization of DRG neurons and pathogenesis of bone cancer pain. Our findings identify a potentially targetable mechanism that may cause bone metastasis-associated pain in cancer patients. Runx1 directly upregulates the transcriptional activity of P2X3R gene promoter Upregulation of Runx1-mediated P2X3R gene transcription underlies bone cancer pain Involvement of GDNF-Ret-ERK signaling in Runx1-mediated P2X3R gene transcription
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Tian YQ, Li JH, Li YC, Xu YC, Zhang PA, Wang Q, Li R, Xu GY. Overexpression of GRK6 alleviates chronic visceral hypersensitivity through downregulation of P2Y6 receptors in anterior cingulate cortex of rats with prenatal maternal stress. CNS Neurosci Ther 2022; 28:851-861. [PMID: 35349212 PMCID: PMC9062565 DOI: 10.1111/cns.13827] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 10/13/2021] [Accepted: 12/03/2021] [Indexed: 12/30/2022] Open
Abstract
Aims Visceral hypersensitivity is a major clinic symptom in patients with irritable bowel syndrome (IBS). Anterior cingulate cortex (ACC) is involved in processing the information of pain. Both G protein‐coupled receptor kinase 6 (GRK6) and P2Y purinoceptor 6 (P2Y6) are associated with neuroinflammation and pathological pain. The aim of this study was to investigate the interaction between GRK6 and P2Y6 in ACC in the development of visceral hypersensitivity of adult offspring rats with prenatal maternal stress (PMS). Methods Visceral hypersensitivity was quantified by abdominal withdrawal reflex threshold to colorectal distension (CRD). The expression and cellular distribution of GRK6 and P2Y6 were determined by Western blotting, qPCR, and fluorescence immunohistochemistry. Co‐immunoprecipitation was used to evaluate the interaction between GRK6 and P2Y6. Results The mRNA and protein levels of GRK6 were significantly decreased in ACC of PMS rats. The injection of GRK6 overexpression virus significantly attenuated visceral hypersensitivity of PMS rats. P2Y6’s mRNA level, protein level, and ratio of membrane protein over total protein expression was markedly increased in PMS rats. P2Y6 antagonist MRS2578 microinjection reversed visceral hypersensitivity of PMS rats. GRK6 overexpression significantly reduced P2Y6’s expression in membrane proteins and P2Y6’s ratio of membrane protein over total protein expression. Conclusions These results indicate that decreased GRK6 leads to the accumulation of P2Y6 at neuron membrane in ACC, thereby contributing to visceral hypersensitivity of PMS rats.
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Affiliation(s)
- Yuan-Qing Tian
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Institute of Neuroscience, Soochow University, Suzhou, China
| | - Jia-Hui Li
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Institute of Neuroscience, Soochow University, Suzhou, China
| | - Yong-Chang Li
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Institute of Neuroscience, Soochow University, Suzhou, China
| | - Yu-Cheng Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Institute of Neuroscience, Soochow University, Suzhou, China
| | - Ping-An Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Institute of Neuroscience, Soochow University, Suzhou, China
| | - Qian Wang
- Department of Anesthesiology, Children's Hospital of Soochow University, Suzhou, China
| | - Rui Li
- Department of Gastroenterology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Guang-Yin Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Institute of Neuroscience, Soochow University, Suzhou, China
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Zhao W, Song S, Chu W, Li Y, Chen S, Ji Y, Chen Q, Jin X, Ji F. Disruption of hippocampal P2RX2/CaMKII/NF-κB signaling contributes to learning and memory impairment in C57BL/6 mice induced by surgery plus anesthesia in neonatal period. Biomed Pharmacother 2022; 149:112897. [PMID: 35378503 DOI: 10.1016/j.biopha.2022.112897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/24/2022] [Accepted: 03/25/2022] [Indexed: 11/16/2022] Open
Abstract
A great number of pediatric patients undergoing varied procedures make neonatal surgery plus anesthesia become a matter of great concern owing to underlying neurotoxicity in developing brain. The authors set out to assess long-term effects of surgery plus anesthesia in mouse model. Six-day-old C57BL/6 mice were randomized to receive either anesthesia with 3% sevoflurane, abdominal surgery under the same anesthesia, or the control condition. These mice were examined of learning and memory at juvenile age in Morris water maze test. The brain tissues of mice were harvested for Western blot analysis, including purinergic receptors P2X family, CaMKII and NF-κB. Another battery of mice were administered with inhibitors of P2RX2/3 (e.g., A317491) into hippocampal dentate gyrus before behavioral testing. We found that neonatal surgery plus anesthesia, but not sevoflurane anesthesia alone, impaired the learning and memory of juvenile mice, as evidenced by delayed escape latency and reduced platform-crossing times. Immunoblotting analysis showed that behavioral abnormalities were associated with increased levels of P2RX2, phosphorylated-CaMKIIβ and activated NF-κB in mouse hippocampus. Injection of A317491 ameliorated the impaired learning and memory of juvenile mice undergoing neonatal surgery plus anesthesia, and it also mitigated the neonatal surgery-induced signaling enhancement of P2RX2/CaMKII/NF-κB. Together, these results indicate that neonatal surgery plus anesthesia may cause long-term cognitive dysfunction, with potential mechanism of increasing P2RX2 and downstream signaling of phosphorylated-CaMKII and NF-κB. Our findings will promote more studies to assess detrimental effects of surgery and accompanying inflammation, diverse anesthetics and even sleeping deprivation on mouse neurodevelopment and neurobehavioral performance.
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Affiliation(s)
- Weiming Zhao
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou 215006, PR China; Institute of Anesthesiology, Soochow University, Suzhou 215006, PR China
| | - Shaoyong Song
- Institute of Anesthesiology, Soochow University, Suzhou 215006, PR China; Department of Pain Medicine, Dushu Lake Hospital Affiliated to Soochow University, Suzhou 215124, PR China
| | - Wei Chu
- Suzhou Medical College of Soochow University, Suzhou 215123, PR China
| | - Yixuan Li
- Suzhou Medical College of Soochow University, Suzhou 215123, PR China
| | - Shiwen Chen
- Suzhou Medical College of Soochow University, Suzhou 215123, PR China
| | - Yumeng Ji
- Suzhou Medical College of Soochow University, Suzhou 215123, PR China
| | - Qingcai Chen
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou 215006, PR China; Institute of Anesthesiology, Soochow University, Suzhou 215006, PR China
| | - Xin Jin
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou 215006, PR China; Institute of Anesthesiology, Soochow University, Suzhou 215006, PR China.
| | - Fuhai Ji
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou 215006, PR China; Institute of Anesthesiology, Soochow University, Suzhou 215006, PR China.
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任 文, 唐 勇. [A Review of the State of Purinergic Signaling and Psychological Stress]. SICHUAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF SICHUAN UNIVERSITY. MEDICAL SCIENCE EDITION 2021; 52:33-38. [PMID: 33474886 PMCID: PMC10408934 DOI: 10.12182/20210160102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Indexed: 11/23/2022]
Abstract
Purinergic signaling is involved in multiple physiological and pathological processes. Psychological stress, as an inharmonious state in response to stressors, is closely related to the function or dysfunction of purinergic signaling. Abnormal expression of ATP interceptors caused by stress leads to psychological stress-related diseases, such as anxiety, depression, post-traumatic stress disorder and schizophrenia. Recent studies demonstrate that a complex network of purinergic signaling (such as ATP, adenosine and P2X2R, P2X3R, P2X4R, P2X7R, A1R, A2AR) plays a key role in psychological stress, but the specific mechanism remains to be further studied. And few studies focus on the application of ATP real-time detecting to psychological stress animal models, so the specific biological role of ATP in the process of stress is still unknown. This review will summarize the relationship between purinergic signaling and psychological stress and propose to apply the duplicate ATP real-time detection technology and purinergic compounds on psychological stress research in order to provide novel potential targets for the treatment of stress-related diseases.
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Affiliation(s)
- 文静 任
- 成都中医药大学 (成都 610075)Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China
- 针灸与时间生物学四川省重点实验室 (成都 610075)Acupuncture and Chronobiology Key Laboratory of Sichuan Province, Chengdu 610075, China
| | - 勇 唐
- 成都中医药大学 (成都 610075)Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China
- 针灸与时间生物学四川省重点实验室 (成都 610075)Acupuncture and Chronobiology Key Laboratory of Sichuan Province, Chengdu 610075, China
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Illes P, Xu GY, Tang Y. Purinergic Signaling in the Central Nervous System in Health and Disease. Neurosci Bull 2020; 36:1239-1241. [PMID: 33146814 DOI: 10.1007/s12264-020-00602-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 10/14/2020] [Indexed: 12/19/2022] Open
Affiliation(s)
- Peter Illes
- International Collaborative Centre on Big Science Plan for Purine Signaling, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China.,Rudolf-Boehm-Institut für Pharmakologie und Toxikologie, Universitaet Leipzig, Leipzig, 04107, Germany
| | - Guang-Yin Xu
- Institute of Neuroscience, Soochow University, Suzhou, 215123, China
| | - Yong Tang
- International Collaborative Centre on Big Science Plan for Purine Signaling, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China. .,Acupuncture and Chronobiology Key Laboratory of Sichuan Province, Chengdu, 610075, China.
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