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Chen Z, Zhou T, Li Y, Li T, Ding Z, Liu L. Paraventricular Mast Cell-Derived Histamine Activates CRH Neurons to Mediate Adult Visceral Hypersensitivity Induced by Neonatal Maternal Separation. Brain Sci 2023; 13:1595. [PMID: 38002554 PMCID: PMC10670437 DOI: 10.3390/brainsci13111595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/07/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023] Open
Abstract
Neonatal maternal separation (NMS) is an early-life stress (ELS) that can result in adult visceral hypersensitivity, which is usually manifested as chronic visceral pain. Although mast cells and corticotropin-releasing hormone (CRH) neurons are involved in stress response, whether there is an interaction between mast cells and CRH neurons in hypothalamic paraventricular nucleus (PVN) during the ELS-induced visceral hypersensitivity remains elusive. Herein, we established an NMS model by separating neonatal mice from their mothers, and observed that these mice presented visceral hypersensitivity in adulthood, as indicated by elevated abdominal withdrawal reflex and lowered visceral pain threshold. The NMS-induced adult visceral hypersensitivity was accompanied by activation of mast cells and CRH neurons in PVN. Also, NMS increased the histamine content (an inflammatory mediator mainly released by mast cells) and histamine H2 receptor (H2R) expression of CRH neurons in PVN. Remarkably, intra-PVN administration with mast cell stabilizer attenuated the NMS-induced CRH neuronal activation and adult visceral pain, while histamine administration showed the opposite effects. Moreover, intra-PVN injection with H2R antagonist alleviated the NMS-induced CRH neuronal activation, PKA and CREB phosphorylation, and importantly, adult visceral pain. Together, our findings revealed a role of an interaction between paraventricular mast cells and CRH neurons in NMS-induced adult visceral hypersensitivity, thereby providing a perspective for the management of visceral pain.
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Affiliation(s)
- Ziyang Chen
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Tiantian Zhou
- Department of Anesthesiology, Nanjing Integrated Traditional Chinese and Western Medicine Hospital Affiliate with Nanjing University of Chinese Medicine, Nanjing 210014, China
| | - Yunfan Li
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Tingting Li
- Department of Geriatrics, Jiangsu Provincial Key Laboratory of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China;
| | - Zhengnian Ding
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Li Liu
- Department of Geriatrics, Jiangsu Provincial Key Laboratory of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China;
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Ramírez-Ponce MP, Flores JA, Barrella L, Alés E. Ketotifen is a microglial stabilizer by inhibiting secretory vesicle acidification. Life Sci 2023; 319:121537. [PMID: 36868401 DOI: 10.1016/j.lfs.2023.121537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/22/2023] [Accepted: 02/24/2023] [Indexed: 03/05/2023]
Abstract
AIMS Microglia survey the brain environment by sensing alarm signals to provide the first line of defense against injury or infection after which they acquire an activated phenotype, but they also respond to chemical signals sent from brain mast cells, sentinels of the immune system, when these are degranulated in response to noxious agents. Nevertheless, excessive microglia activation damages the surrounding healthy neural tissue causing progressive loss of neurons and inducing chronic inflammation. Thus, it would be of intense interest the development and application of agents which prevent mast cell mediator release and inhibit the actions of such mediators once released on microglia. MAIN METHODS Fluorescence measurements of fura-2 and quinacrine were used to measure intracellular Ca2+ signaling and exocytotic vesicle fusion in resting and activated microglia. KEY FINDINGS We show that treatment of microglia with a cocktail of mast cell mediators induces microglia activation, phagocytosis, and exocytosis, and reveal by the first-time microglia undergo a phase of vesicular acidification just before the exocytotic fusion occurs. This acidification is an important process for vesicular maturation and contributes with ∼25 % to the content that the vesicle can store and later release by exocytosis. Pre-incubation with ketotifen, a mast cell stabilizer and H1R antagonist completely abolished histamine-mediated calcium signaling and acidification of microglial organelles, and concomitantly reduced the discharge of vesicle contents. SIGNIFICANCE These results highlight a key role for vesicle acidification in microglial physiology and provide a potential therapeutic target for diseases related to mast cell and microglia-mediated neuroinflammation.
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Affiliation(s)
| | - Juan Antonio Flores
- Dpto. de Bioquímica Médica y Biología Molecular e Inmunología, Facultad de Medicina, Universidad de Sevilla, Spain
| | - Lorenzo Barrella
- Dpto. de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Spain
| | - Eva Alés
- Dpto. de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Spain.
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Ikeda T, Nakamura K, Morishita S, Sato T, Horie T, Kida T, Oku H, Takai S, Jin D. Decreased Presence of Mast Cells in the Bursa Premacularis of Proliferative Diabetic Retinopathy. Ophthalmic Res 2021; 64:1002-1012. [PMID: 34515200 DOI: 10.1159/000518438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 07/12/2021] [Indexed: 11/19/2022]
Affiliation(s)
- Tsunehiko Ikeda
- Department of Ophthalmology, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | | | - Seita Morishita
- Department of Ophthalmology, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Takaki Sato
- Department of Ophthalmology, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Taeko Horie
- Department of Ophthalmology, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Teruyo Kida
- Department of Ophthalmology, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Hidehiro Oku
- Department of Ophthalmology, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Shinji Takai
- Department of Innovative Medicine, Graduate School of Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Denan Jin
- Department of Innovative Medicine, Graduate School of Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
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Bhuiyan P, Chen Y, Karim M, Dong H, Qian Y. Bidirectional communication between mast cells and the gut-brain axis in neurodegenerative diseases: Avenues for therapeutic intervention. Brain Res Bull 2021; 172:61-78. [PMID: 33892083 DOI: 10.1016/j.brainresbull.2021.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 03/02/2021] [Accepted: 04/17/2021] [Indexed: 12/12/2022]
Abstract
Although the global incidence of neurodegenerative diseases has been steadily increasing, especially in adults, there are no effective therapeutic interventions. Neurodegeneration is a heterogeneous group of disorders that is characterized by the activation of immune cells in the central nervous system (CNS) (e.g., mast cells and microglia) and subsequent neuroinflammation. Mast cells are found in the brain and the gastrointestinal tract and play a role in "tuning" neuroimmune responses. The complex bidirectional communication between mast cells and gut microbiota coordinates various dynamic neuro-cellular responses, which propagates neuronal impulses from the gastrointestinal tract into the CNS. Numerous inflammatory mediators from degranulated mast cells alter intestinal gut permeability and disrupt blood-brain barrier, which results in the promotion of neuroinflammatory processes leading to neurological disorders, thereby offsetting the balance in immune-surveillance. Emerging evidence supports the hypothesis that gut-microbiota exert a pivotal role in inflammatory signaling through the activation of immune and inflammatory cells. Communication between inflammatory cytokines and neurocircuits via the gut-brain axis (GBA) affects behavioral responses, activates mast cells and microglia that causes neuroinflammation, which is associated with neurological diseases. In this comprehensive review, we focus on what is currently known about mast cells and the gut-brain axis relationship, and how this relationship is connected to neurodegenerative diseases. We hope that further elucidating the bidirectional communication between mast cells and the GBA will not only stimulate future research on neurodegenerative diseases but will also identify new opportunities for therapeutic interventions.
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Affiliation(s)
- Piplu Bhuiyan
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China
| | - Yinan Chen
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China
| | - Mazharul Karim
- College of Pharmacy, Western University of Health Science, 309 East 2nd Street, Pomona, CA, 91766, USA
| | - Hongquan Dong
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China.
| | - Yanning Qian
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China.
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Chen Z, Zhou T, Zhang Y, Dong H, Jin W. Mast cells in the paraventricular nucleus participate in visceral hypersensitivity induced by neonatal maternal separation. Behav Brain Res 2021; 402:113113. [PMID: 33412227 DOI: 10.1016/j.bbr.2020.113113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 12/11/2020] [Accepted: 12/28/2020] [Indexed: 02/08/2023]
Abstract
Early-life stress (ELS) is a high-risk factor for the development of chronic visceral pain in adulthood. Emerging evidence suggests that mast cells play a key role in the development of visceral hypersensitivity through interaction with neurons. The sensitization of corticotropin-releasing factor (CRF) neurons in the hypothalamic paraventricular nucleus (PVN) plays a pivotal role in the pathogenesis of visceral pain. However, the precise mechanism by which mast cells and CRF neurons interact in the PVN in the pathogenesis of visceral hypersensitivity remains elusive. In the present study, we used neonatal maternal separation (MS), an ELS model, and observed that neonatal MS induced visceral hypersensitivity and triggered PVN mast cell activation in adult rats, which was repressed by intra-PVN infusion of the mast cell stabilizer disodium cromoglycate (cromolyn). Wild-type (WT) mice but not mast cell-deficient KitW-sh/W-sh mice that had experienced neonatal MS exhibited chronic visceral hypersensitivity. MS was associated with an increase in the expression of proinflammatory mediators, the number of CRF+ cells and CRF protein in the PVN, which was prevented by intra-PVN infusion of cromolyn. Furthermore, we demonstrated that intra-PVN infusion of the mast degranulator compound 48/80 significantly induced mast cell activation, resulting in proinflammatory mediator release, CRF neuronal sensitization, and visceral hypersensitivity, which was suppressed by cromolyn. Overall, our findings demonstrated that neonatal MS induces the activation of PVN mast cells, which secrete numerous proinflammatory mediators that may participate in neighboring CRF neuronal activity, ultimately directly inducing visceral hypersensitivity in adulthood.
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Affiliation(s)
- Ziyang Chen
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Tiantian Zhou
- Department of Anesthesiology, Nanjing Integrated Traditional Chinese and Western Medicine Hospital Affiliate with Nanjing University of Chinese Medicine, Nanjing, China
| | - Yongmei Zhang
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, China
| | - Hongquan Dong
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
| | - Wenjie Jin
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
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