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Shin HA, Park M, Lee HJ, Duong VA, Kim HM, Hwang DY, Lee H, Lew H. Unveiling Neuroprotection and Regeneration Mechanisms in Optic Nerve Injury: Insight from Neural Progenitor Cell Therapy with Focus on Vps35 and Syntaxin12. Cells 2023; 12:2412. [PMID: 37830626 PMCID: PMC10572010 DOI: 10.3390/cells12192412] [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: 08/30/2023] [Revised: 09/27/2023] [Accepted: 10/02/2023] [Indexed: 10/14/2023] Open
Abstract
Axonal degeneration resulting from optic nerve damage can lead to the progressive death of retinal ganglion cells (RGCs), culminating in irreversible vision loss. We contrasted two methods for inducing optic nerve damage: optic nerve compression (ONCo) and optic nerve crush (ONCr). These were assessed for their respective merits in simulating traumatic optic neuropathies and neurodegeneration. We also administered neural progenitor cells (NPCs) into the subtenon space to validate their potential in mitigating optic nerve damage. Our findings indicate that both ONCo and ONCr successfully induced optic nerve damage, as shown by increases in ischemia and expression of genes linked to neuronal regeneration. Post NPC injection, recovery in the expression of neuronal regeneration-related genes was more pronounced in the ONCo model than in the ONCr model, while inflammation-related gene expression saw a better recovery in ONCr. In addition, the proteomic analysis of R28 cells in hypoxic conditions identified Vps35 and Syntaxin12 genes. Vps35 preserved the mitochondrial function in ONCo, while Syntaxin12 appeared to restrain inflammation via the Wnt/β-catenin signaling pathway in ONCr. NPCs managed to restore damaged RGCs by elevating neuroprotection factors and controlling inflammation through mitochondrial homeostasis and Wnt/β-catenin signaling in hypoxia-injured R28 cells and in both animal models. Our results suggest that ischemic injury and crush injury cause optic nerve damage via different mechanisms, which can be effectively simulated using ONCo and ONCr, respectively. Moreover, cell-based therapies such as NPCs may offer promising avenues for treating various optic neuropathies, including ischemic and crush injuries.
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Affiliation(s)
- Hyun-Ah Shin
- Department of Biomedical Science, CHA University, Pocheon-si 13488, Gyeonggi-Do, Republic of Korea; (H.-A.S.); (H.-M.K.); (D.-Y.H.)
| | - Mira Park
- Department of Ophthalmology, CHA Medical Center, CHA University, Pocheon-si 13488, Gyeonggi-Do, Republic of Korea;
| | - Hey Jin Lee
- CHA Advanced Research Institute, CHA University, Pocheon-si 13488, Gyeonggi-Do, Republic of Korea;
| | - Van-An Duong
- Gachon Institute of Pharmaceutical Sciences, Gachon College of Pharmacy, Gachon University, Incheon 21936, Republic of Korea; (V.-A.D.); (H.L.)
| | - Hyun-Mun Kim
- Department of Biomedical Science, CHA University, Pocheon-si 13488, Gyeonggi-Do, Republic of Korea; (H.-A.S.); (H.-M.K.); (D.-Y.H.)
| | - Dong-Youn Hwang
- Department of Biomedical Science, CHA University, Pocheon-si 13488, Gyeonggi-Do, Republic of Korea; (H.-A.S.); (H.-M.K.); (D.-Y.H.)
- Department of Microbiology, School of Medicine, CHA University, Pocheon-si 13488, Gyeonggi-Do, Republic of Korea
| | - Hookeun Lee
- Gachon Institute of Pharmaceutical Sciences, Gachon College of Pharmacy, Gachon University, Incheon 21936, Republic of Korea; (V.-A.D.); (H.L.)
| | - Helen Lew
- Department of Ophthalmology, CHA Medical Center, CHA University, Pocheon-si 13488, Gyeonggi-Do, Republic of Korea;
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Involvement of Mast-Cell-Tryptase- and Protease-Activated Receptor 2-Mediated Signaling and Urothelial Barrier Dysfunction with Reduced Uroplakin II Expression in Bladder Hyperactivity Induced by Chronic Bladder Ischemia in the Rat. Int J Mol Sci 2023; 24:ijms24043982. [PMID: 36835398 PMCID: PMC9966957 DOI: 10.3390/ijms24043982] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/07/2023] [Accepted: 02/14/2023] [Indexed: 02/18/2023] Open
Abstract
We aimed to investigate the relationship between mast cell (MC) infiltration into the bladder with urothelial barrier dysfunction and bladder hyperactivity in a chronic bladder ischemia (CBI) rat model. We compared CBI rats (CBI group; n = 10) with normal rats (control group; n = 10). We measured the expression of mast cell tryptase (MCT) and protease-activated receptor 2 (PAR2), which are correlated with C fiber activation via MCT, and Uroplakins (UP Ia, Ib, II and III), which are critical to urothelial barrier function, via Western blotting. The effects of FSLLRY-NH2, a PAR2 antagonist, administered intravenously, on the bladder function of CBI rats were evaluated with a cystometrogram. In the CBI group, the MC number in the bladder was significantly greater (p = 0.03), and the expression of MCT (p = 0.02) and PAR2 (p = 0.02) was significantly increased compared to that of the control group. The 10 μg/kg FSLLRY-NH2 injection significantly increased the micturition interval of CBI rats (p = 0.03). The percentage of UP-II-positive cells on the urothelium with immunohistochemical staining was significantly lower in the CBI group than in the control group (p < 0.01). Chronic ischemia induces urothelial barrier dysfunction via impairing UP II, consequently inducing MC infiltration into the bladder wall and increased PAR2 expression. PAR2 activation by MCT may contribute to bladder hyperactivity.
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Higashiyama M, Miura S, Hokari R. Modulation by luminal factors on the functions and migration of intestinal innate immunity. Front Immunol 2023; 14:1113467. [PMID: 36860849 PMCID: PMC9968923 DOI: 10.3389/fimmu.2023.1113467] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 01/25/2023] [Indexed: 02/15/2023] Open
Abstract
Luminal antigens, nutrients, metabolites from commensal bacteria, bile acids, or neuropeptides influence the function and trafficking of immune cells in the intestine. Among the immune cells in the gut, innate lymphoid cells, including macrophages, neutrophils, dendritic cells, mast cells, and innate lymphoid cells, play an important role for the maintenance of intestinal homeostasis through a rapid immune response to luminal pathogens. These innate cells are influenced by several luminal factors, possibly leading to dysregulated gut immunity and intestinal disorders such as inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), and intestinal allergy. Luminal factors are sensed by distinct neuro-immune cell units, which also have a strong impact on immunoregulation of the gut. Immune cell trafficking from the blood stream through the lymphatic organ to lymphatics, an essential function for immune responses, is also modulated by luminal factors. This mini-review examines knowledge of luminal and neural factors that regulate and modulate response and migration of leukocytes including innate immune cells, some of which are clinically associated with pathological intestinal inflammation.
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Affiliation(s)
- Masaaki Higashiyama
- Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan,*Correspondence: Masaaki Higashiyama,
| | - Soichiro Miura
- International University of Health and Welfare, Tokyo, Japan
| | - Ryota Hokari
- Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan
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Hussain Z, Park H. Inflammation and Impaired Gut Physiology in Post-operative Ileus: Mechanisms and the Treatment Options. J Neurogastroenterol Motil 2022; 28:517-530. [PMID: 36250359 PMCID: PMC9577567 DOI: 10.5056/jnm22100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/08/2022] [Accepted: 08/31/2022] [Indexed: 11/20/2022] Open
Abstract
Post-operative ileus (POI) is the transient cessation of coordinated gastrointestinal motility after abdominal surgical intervention. It decreases quality of life, prolongs length of hospital stay, and increases socioeconomic costs. The mechanism of POI is complex and multifactorial, and has been broadly categorized into neurogenic and inflammatory phase. Neurogenic phase mediated release of corticotropin-releasing factor (CRF) plays a central role in neuroinflammation, and affects both central autonomic response as well hypothalamic-pituitary-adrenal (HPA) axis. HPA-stress axis associated cortisol release adversely affects gut microbiota and permeability. Peripheral CRF (pCRF) is a key player in stress induced gastric emptying and colonic transit. It functions as a local effector and interacts with the CRF receptors on the mast cell to release chemical mediators of inflammation. Mast cells proteases disrupt epithelial barrier via protease activated receptor-2 (PAR-2). PAR-2 facilitates cytoskeleton contraction to reorient tight junction proteins such as occludin, claudins, junctional adhesion molecule, and zonula occludens-1 to open epithelial barrier junctions. Barrier opening affects the selectivity, and hence permeation of luminal antigens and solutes in the gastrointestinal tract. Translocation of luminal antigens perturbs mucosal immune system to further exacerbate inflammation. Stress induced dysbiosis and decrease in production of short chain fatty acids add to the inflammatory response and barrier disintegration. This review discusses potential mechanisms and factors involved in the pathophysiology of POI with special reference to inflammation and interlinked events such as epithelial barrier dysfunction and dysbiosis. Based on this review, we recommend CRF, mast cells, macrophages, and microbiota could be targeted concurrently for efficient POI management.
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Affiliation(s)
- Zahid Hussain
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Hyojin Park
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
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Enteric nervous system and intestinal epithelial regulation of the gut-brain axis. J Allergy Clin Immunol 2022; 150:513-522. [PMID: 36075637 DOI: 10.1016/j.jaci.2022.07.015] [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: 06/03/2022] [Revised: 07/18/2022] [Accepted: 07/22/2022] [Indexed: 12/18/2022]
Abstract
The gut-brain axis describes a bidirectional interplay within the enteric environment between the intestinal epithelium, the mucosal immune system, and the microbiota with the enteric nervous system. This interplay provides a link between exogenous environmental stimuli such as nutrient sensing, and nervous system function, as well as a mechanism of feedback from cortical and sensory centers of the brain to enteric activities. The intestinal epithelium is one of the human body's largest sources of hormones and neurotransmitters, which have critical effects on neuronal function. The influence of the gut microbiota on these processes appears to be profound; yet to date, it has been insufficiently explored. Disruption of the intestinal microbiota is linked not only to diseases in the gut but also to brain symptomatology, including neurodegenerative and behavioral disorders (Parkinson disease, Alzheimer disease, autism, and anxiety and/or depression). In this review we discuss the cellular wiring of the gut-brain axis, with a particular focus on the epithelial and neuronal interaction, the evidence that has led to our current understanding of the intestinal role in neurologic function, and future directions of research to unravel this important interaction in both health and allergic disease.
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Hsin L, Fernandopulle NA, Ding J, Lumb C, Veldhuis N, Karas JA, Northfield SE, Mackay GA. The effect of substance P and its common in vivo-formed metabolites on MRGPRX2 and human mast cell activation. Pharmacol Res Perspect 2022; 10:e00990. [PMID: 35904495 PMCID: PMC9337217 DOI: 10.1002/prp2.990] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/20/2022] [Accepted: 06/22/2022] [Indexed: 02/06/2023] Open
Abstract
The tachykinin neuropeptide substance P (SP) is the canonical agonist peptide for the neurokinin 1 receptor (NK1R). More recently, it has also been shown to activate the Mas‐related G protein‐coupled receptor X2 (MRGPRX2) receptor on mast cells (MCs), triggering degranulation and release of inflammatory mediators. SP undergoes rapid C‐terminal truncation in vivo by a number of proteases to generate the metabolites SP(1–9)‐COOH and in particular SP(1–7)‐COOH. While the C terminus of SP is critical for NK1R activation, studies have shown that the peptide polycationic N terminus is key for MRGPRX2 and mast cell activation. The study thus aimed to determine if the C‐terminally truncated metabolites of SP, SP(1–9)‐COOH, and SP(1–7)‐COOH retained stimulatory activity at MRGPRX2. SP, SP(1–9)‐COOH, and SP(1–7)‐COOH were synthesized and tested on HEK293 cells expressing NK1R or MRGPRX2, and LAD2 human mast cells, to determine the activity of SP and its metabolites in Ca2+ mobilization, degranulation, and cytokine assays. As expected from prior studies, both C‐terminally truncated SP metabolites had essentially no activity at NK1R, even at very high concentrations. In contrast, the in vivo metabolite of SP, SP(1–9)‐COOH retained ability to activate MRGPRX2 across all parameters tested, albeit with reduced potency compared to intact SP. SP(1–7)‐COOH did not produce any significant MRGRPX2 activation. Our results suggest that the SP metabolite, SP(1–9)‐COOH, may play a regulatory role through the activation of MRGPRX2. However, given the relatively low potency of both SP and SP(1–9)‐COOH at MRGPRX2, additional work is needed to better understand the biological importance of this expanded SP/MRGPRX2 pathway.
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Affiliation(s)
- Lin Hsin
- Department of Biochemistry and Pharmacology, The University of Melbourne, Parkville, Victoria, Australia
| | - Nithya A Fernandopulle
- Department of Biochemistry and Pharmacology, The University of Melbourne, Parkville, Victoria, Australia
| | - Jie Ding
- Department of Biochemistry and Pharmacology, The University of Melbourne, Parkville, Victoria, Australia
| | - Chris Lumb
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Nicholas Veldhuis
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - John A Karas
- School of Chemistry, The University of Melbourne, Parkville, Victoria, Australia
| | - Susan E Northfield
- Department of Biochemistry and Pharmacology, The University of Melbourne, Parkville, Victoria, Australia
| | - Graham A Mackay
- Department of Biochemistry and Pharmacology, The University of Melbourne, Parkville, Victoria, Australia
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Awad-Igbaria Y, Dadon S, Shamir A, Livoff A, Shlapobersky M, Bornstein J, Palzur E. Characterization of Early Inflammatory Events Leading to Provoked Vulvodynia Development in Rats. J Inflamm Res 2022; 15:3901-3923. [PMID: 35845089 PMCID: PMC9286136 DOI: 10.2147/jir.s367193] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 06/16/2022] [Indexed: 11/23/2022] Open
Abstract
Background Provoked vulvodynia (PV) is the main cause of vulvar pain and dyspareunia. The etiology of PV has not yet been elucidated. However, PV is associated with a history of recurrent inflammation, and its often accompanied by increases in the numbers of mast cells (MCs) and sensory hyperinnervation in the vulva. Therefore, this study aimed to examine the role of MCs and the early inflammatory events in the development of chronic vulvar pain in a rat model of PV. Methods Mechanical and thermal vulvar sensitivity was measured for 5 months following zymosan vulvar challenges. Vulvar changes in glutamate and nerve growth factor (NGF) were analyzed using ELISA. Immunofluorescence (IF) staining of the vulvar section after 20, 81, and 160 days of the zymosan challenge were performed to test MCs accumulation, hyperinnervation, and expression of pain channels (transient receptor potential vanilloid/ankyrin-1-TRPV1 & TRPA1) in vulvar neurons. Changes in the development of vulvar pain were evaluated following the administration of the MCs stabilizer ketotifen fumarate (KF) during zymosan vulvar challenges. Results Zymosan-challenged rats developed significant mechanical and thermal vulvar sensitivity that persisted for over 160 days after the zymosan challenge. During inflammation, increased local concentrations of NGF and glutamate and a robust increase in MCs degranulation were observed in zymosan-challenged rats. In addition, zymosan-challenged rats displayed sensory hyperinnervation and an increase in the expression of TRPV1 and TRPA1. Treatment with KF attenuated the upregulated level of NGF during inflammation, modulated the neuronal modifications, reduced MCs accumulation, and enhanced mechanical hypersensitivity after repeated inflammation challenges. Conclusion The present findings suggest that vulvar hypersensitivity is mediated by MCs accumulation, nerve growth, and neuromodulation of TRPV1 and TRPA1. Hence, KF treatment during the critical period of inflammation contributes to preventing chronic vulvar pain development.
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Affiliation(s)
- Yaseen Awad-Igbaria
- Faculty of Medicine in the Galilee, Bar-Ilan University, Safed, Israel.,The Research Institute of Galilee Medical Center, Nahariya, Israel
| | - Shilo Dadon
- Faculty of Medicine in the Galilee, Bar-Ilan University, Safed, Israel.,The Research Institute of Galilee Medical Center, Nahariya, Israel
| | - Alon Shamir
- Psychobiology Research Laboratory, Mazor Mental Health Center, Akko, Israel.,The Ruth and Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
| | - Alejandro Livoff
- Pathology Department, Barzilai University Medical Center, Ashkelon, Israel
| | - Mark Shlapobersky
- Pathology Department, Barzilai University Medical Center, Ashkelon, Israel
| | - Jacob Bornstein
- Faculty of Medicine in the Galilee, Bar-Ilan University, Safed, Israel.,The Research Institute of Galilee Medical Center, Nahariya, Israel
| | - Eilam Palzur
- The Research Institute of Galilee Medical Center, Nahariya, Israel
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Klein Wolterink RGJ, Wu GS, Chiu IM, Veiga-Fernandes H. Neuroimmune Interactions in Peripheral Organs. Annu Rev Neurosci 2022; 45:339-360. [PMID: 35363534 DOI: 10.1146/annurev-neuro-111020-105359] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Interactions between the nervous and immune systems were recognized long ago, but recent studies show that this crosstalk occurs more frequently than was previously appreciated. Moreover, technological advances have enabled the identification of the molecular mediators and receptors that enable the interaction between these two complex systems and provide new insights on the role of neuroimmune crosstalk in organismal physiology. Most neuroimmune interaction occurs at discrete anatomical locations in which neurons and immune cells colocalize. Here, we describe the interactions of the different branches of the peripheral nervous system with immune cells in various organs, including the skin, intestine, lung, and adipose tissue. We highlight how neuroimmune crosstalk orchestrates physiological processes such as host defense, tissue repair, metabolism, and thermogenesis. Unraveling these intricate relationships is invaluable to explore the therapeutic potential of neuroimmune interaction. Expected final online publication date for the Annual Review of Neuroscience, Volume 45 is July 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
| | - Glendon S Wu
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts, USA;
| | - Isaac M Chiu
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts, USA;
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Rosa AC, Nardini P, Sgambellone S, Gurrieri M, Spampinato SF, Dell’Accio A, Chazot PL, Obara I, Liu WL, Pini A. CNS-Sparing Histamine H3 Receptor Antagonist as a Candidate to Prevent the Diabetes-Associated Gastrointestinal Symptoms. Biomolecules 2022; 12:biom12020184. [PMID: 35204685 PMCID: PMC8961615 DOI: 10.3390/biom12020184] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/12/2022] [Accepted: 01/20/2022] [Indexed: 12/11/2022] Open
Abstract
Among the histamine receptors, growing evidence points to the histamine H3 receptor as a pharmacological candidate to counteract the autonomic neuropathy associated with diabetes. The study aimed to evaluate the effect of PF00868087 (also known as ZPL-868), a CNS-sparing histamine H3 receptor antagonist, on the autonomic neuropathy of the intestinal tract associated with diabetes. Diabetes was induced in male BALB/c mice by a single high dose of streptozotocin (150 mg/kg). Colorectal specimens from control and diabetic mice, randomized to vehicle or PF0086087 (10, 30, 100 mg/kg/day by oral gavage for 14 days), were processed for morphological and immunohistochemical analysis. A significant overproduction of mucus in the intestinal mucosa of diabetic mice compared to the controls was observed. PF0086087 at the highest dose prevented mucin overproduction. The immunohistochemistry analysis demonstrated that diabetes causes a decrease in the inhibitory component of enteric motility, measured as the percentage of neuronal nitric oxide synthase-positive neurons (p < 0.05) and a parallel increase in the excitatory component evaluated as substance P-positive fibres (p < 0.01). PF0086087 dose-dependently prevented these pathophysiological events. In conclusion, PF0086087 may be an essential tool in preventing nitrergic dysfunction in the myenteric plexus of the distal colon and diabetes-induced gastrointestinal complications.
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Affiliation(s)
- Arianna Carolina Rosa
- Department of Scienza e Tecnologia del Farmaco, University of Turin, Via P. Giuria 9, 10125 Turin, Italy;
- Correspondence: (A.C.R.); (A.P.); Tel.: +39-0116707955 (A.C.R.); +39-0552758155 (A.P.)
| | - Patrizia Nardini
- Department of Clinical and Experimental Medicine, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy; (P.N.); (M.G.); (A.D.)
| | - Silvia Sgambellone
- Department of Neuroscience, Psychology, Drug Research and Child Health (NEUROFARBA), Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy;
| | - Maura Gurrieri
- Department of Clinical and Experimental Medicine, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy; (P.N.); (M.G.); (A.D.)
| | - Simona Federica Spampinato
- Department of Scienza e Tecnologia del Farmaco, University of Turin, Via P. Giuria 9, 10125 Turin, Italy;
| | - Alfonso Dell’Accio
- Department of Clinical and Experimental Medicine, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy; (P.N.); (M.G.); (A.D.)
| | - Paul L Chazot
- School of Biological and Biomedical Science, Durham University, Durham DH1 3LE, UK;
| | - Ilona Obara
- School of Pharmacy and Translational and Clinical Research Institute, King George VI Building, Newcastle University, Newcastle-upon-Tyne NE1 7RU, UK;
| | - Wai L Liu
- Liu & Co Consulting Limited, Whitstable CT5 3RF, UK;
| | - Alessandro Pini
- Department of Clinical and Experimental Medicine, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy; (P.N.); (M.G.); (A.D.)
- Correspondence: (A.C.R.); (A.P.); Tel.: +39-0116707955 (A.C.R.); +39-0552758155 (A.P.)
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Pattabiraman G, Liu Z, Paul M, Schaeffer AJ, Thumbikat P. mMCP7, a Mouse Ortholog of δ Tryptase, Mediates Pelvic Tactile Allodynia in a Model of Chronic Pelvic Pain. FRONTIERS IN PAIN RESEARCH 2022; 2:805136. [PMID: 35295515 PMCID: PMC8915762 DOI: 10.3389/fpain.2021.805136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 12/16/2021] [Indexed: 11/13/2022] Open
Abstract
Chronic prostatitis/Chronic pelvic pain syndrome (CP/CPPS) is a condition that affects a large number of men and has unknown etiology. We have previously demonstrated the presence of elevated levels of mast cell tryptase in expressed prostatic secretions (EPS) of CP/CPPS patients. In a murine model of CP/CPPS, we showed tryptase and its cognate receptor PAR2 as critical to the development of pelvic pain and lower urinary tract symptoms. Here, we extend these observations to demonstrate that an isoform of tryptase called delta (δ)-tryptase, is elevated in the EPS of patients with CP/CPPS and is correlated with pelvic pain symptoms. Using an Escherichia coli (CP1) -induced murine model of CP/CPPS, we demonstrated a differential response in C57BL/6J and NOD/ShiLtJ mice, with C57BL6/J mice being resistant to an increase in pelvic tactile allodynia, despite having equivalent levels of activated mast cells in the prostate. Activated tryptase+ve mast cells were observed to be in closer apposition to PGP9.5+ve nerve fibers in the prostate stroma of NOD/ShiLtJ in comparison to C57BL/6J mice. The mouse ortholog of δ-tryptase, mouse mast cell protease 7 (mMCP7) has been reported to be unexpressed in C57BL/6J mice. We confirmed the absence of mMCP7 in the prostates of C57BL/6J and its presence in NOD/ShiLtJ mice. To evaluate a role for mMCP7 in the differential allodynia responses, we performed direct intra-urethral instillations of mMCP7 and the beta (β)-tryptase isoform ortholog, mMCP6 in the CP1-infection model. mMCP7, but not mMCP6 was able to induce an acute pelvic allodynia response in C57BL/6J mice. In-vitro studies with mMCP7 on cultured mast cells as well as dissociated primary neurons demonstrated the ability to induce differential activation of pain and inflammation associated molecules compared to mMCP6. We conclude that mMCP7, and possibility its human ortholog δ-tryptase, may play an important role in mediating the development of pelvic tactile allodynia in the mouse model of pelvic pain and in patients with CP/CPPS.
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Affiliation(s)
| | | | | | | | - Praveen Thumbikat
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
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Sansores-España LD, Melgar-Rodríguez S, Olivares-Sagredo K, Cafferata EA, Martínez-Aguilar VM, Vernal R, Paula-Lima AC, Díaz-Zúñiga J. Oral-Gut-Brain Axis in Experimental Models of Periodontitis: Associating Gut Dysbiosis With Neurodegenerative Diseases. FRONTIERS IN AGING 2021; 2:781582. [PMID: 35822001 PMCID: PMC9261337 DOI: 10.3389/fragi.2021.781582] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 11/08/2021] [Indexed: 12/12/2022]
Abstract
Periodontitis is considered a non-communicable chronic disease caused by a dysbiotic microbiota, which generates a low-grade systemic inflammation that chronically damages the organism. Several studies have associated periodontitis with other chronic non-communicable diseases, such as cardiovascular or neurodegenerative diseases. Besides, the oral bacteria considered a keystone pathogen, Porphyromonas gingivalis, has been detected in the hippocampus and brain cortex. Likewise, gut microbiota dysbiosis triggers a low-grade systemic inflammation, which also favors the risk for both cardiovascular and neurodegenerative diseases. Recently, the existence of an axis of Oral-Gut communication has been proposed, whose possible involvement in the development of neurodegenerative diseases has not been uncovered yet. The present review aims to compile evidence that the dysbiosis of the oral microbiota triggers changes in the gut microbiota, which creates a higher predisposition for the development of neuroinflammatory or neurodegenerative diseases.The Oral-Gut-Brain axis could be defined based on anatomical communications, where the mouth and the intestine are in constant communication. The oral-brain axis is mainly established from the trigeminal nerve and the gut-brain axis from the vagus nerve. The oral-gut communication is defined from an anatomical relation and the constant swallowing of oral bacteria. The gut-brain communication is more complex and due to bacteria-cells, immune and nervous system interactions. Thus, the gut-brain and oral-brain axis are in a bi-directional relationship. Through the qualitative analysis of the selected papers, we conclude that experimental periodontitis could produce both neurodegenerative pathologies and intestinal dysbiosis, and that periodontitis is likely to induce both conditions simultaneously. The severity of the neurodegenerative disease could depend, at least in part, on the effects of periodontitis in the gut microbiota, which could strengthen the immune response and create an injurious inflammatory and dysbiotic cycle. Thus, dementias would have their onset in dysbiotic phenomena that affect the oral cavity or the intestine. The selected studies allow us to speculate that oral-gut-brain communication exists, and bacteria probably get to the brain via trigeminal and vagus nerves.
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Affiliation(s)
- Luis Daniel Sansores-España
- Periodontal Biology Laboratory, Faculty of Dentistry, University of Chile, Santiago, Chile
- Faculty of Dentistry, Autonomous University of Yucatán, Mérida, México
| | | | | | - Emilio A. Cafferata
- Department of Periodontology, School of Dentistry, Universidad Científica Del Sur, Lima, Perú
| | | | - Rolando Vernal
- Periodontal Biology Laboratory, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Andrea Cristina Paula-Lima
- Biomedical Neuroscience Institute, Faculty of Medicine, Universidad de Chile, Santiago, Chile
- Department of Neuroscience, Faculty of Medicine, Universidad de Chile, Santiago, Chile
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Jaime Díaz-Zúñiga
- Periodontal Biology Laboratory, Faculty of Dentistry, University of Chile, Santiago, Chile
- Department of Medicine, Faculty of Medicine, University of Atacama, Copiapó, Chile
- *Correspondence: Jaime Díaz-Zúñiga, ,
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12
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Neuro-immune-metabolism: The tripod system of homeostasis. Immunol Lett 2021; 240:77-97. [PMID: 34655659 DOI: 10.1016/j.imlet.2021.10.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 09/30/2021] [Accepted: 10/08/2021] [Indexed: 11/20/2022]
Abstract
Homeostatic regulation of cellular and molecular processes is essential for the efficient physiological functioning of body organs. It requires an intricate balance of several networks throughout the body, most notable being the nervous, immune and metabolic systems. Several studies have reported the interactions between neuro-immune, immune-metabolic and neuro-metabolic pathways. Current review aims to integrate the information and show that neuro, immune and metabolic systems form the triumvirate of homeostasis. It focuses on the cellular and molecular interactions occurring in the extremities and intestine, which are innervated by the peripheral nervous system and for the intestine in particular the enteric nervous system. While the interdependence of neuro-immune-metabolic pathways provides a fallback mechanism in case of disruption of homeostasis, in chronic pathologies of continued disequilibrium, the collapse of one system spreads to the other interacting networks as well. Current review illustrates this domino-effect using diabetes as the main example. Together, this review attempts to provide a holistic picture of the integrated network of neuro-immune-metabolism and attempts to broaden the outlook when devising a scientific study or a treatment strategy.
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13
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The Interplay between Nutrition, Innate Immunity, and the Commensal Microbiota in Adaptive Intestinal Morphogenesis. Nutrients 2021; 13:nu13072198. [PMID: 34206809 PMCID: PMC8308283 DOI: 10.3390/nu13072198] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/20/2021] [Accepted: 06/23/2021] [Indexed: 12/15/2022] Open
Abstract
The gastrointestinal tract is a functionally and anatomically segmented organ that is colonized by microbial communities from birth. While the genetics of mouse gut development is increasingly understood, how nutritional factors and the commensal gut microbiota act in concert to shape tissue organization and morphology of this rapidly renewing organ remains enigmatic. Here, we provide an overview of embryonic mouse gut development, with a focus on the intestinal vasculature and the enteric nervous system. We review how nutrition and the gut microbiota affect the adaptation of cellular and morphologic properties of the intestine, and how these processes are interconnected with innate immunity. Furthermore, we discuss how nutritional and microbial factors impact the renewal and differentiation of the epithelial lineage, influence the adaptation of capillary networks organized in villus structures, and shape the enteric nervous system and the intestinal smooth muscle layers. Intriguingly, the anatomy of the gut shows remarkable flexibility to nutritional and microbial challenges in the adult organism.
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14
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Natarajan S, Govender K, Shobo A, Baijnath S, Arvidsson PI, Govender T, Lin J, Maguire GE, Naicker T, Kruger HG. Potential of brain mast cells for therapeutic application in the immune response to bacterial and viral infections. Brain Res 2021; 1767:147524. [PMID: 34015358 DOI: 10.1016/j.brainres.2021.147524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/21/2021] [Accepted: 05/11/2021] [Indexed: 10/21/2022]
Abstract
A wide range of microorganisms can infect the central nervous system (CNS). The immune response of the CNS provides limited protection against microbes penetrating the blood-brain barrier. This results in a neurological deficit and sometimes leads to high morbidity and mortality rates despite advanced therapies. For the last two decades, different studies have expanded our understanding of the molecular basis of human neuroinfectious diseases, especially concerning the contributions of mast cell interactions with other central nervous system compartments. Brain mast cells are multifunctional cells derived from the bone marrow and reside in the brain. Their proximity to blood vessels, their role as "first responders" their unique receptors systems and their ability to rapidly release pathogen responsive mediators enable them to exert a crucial defensive role in the host-defense system. This review describes key biological and physiological functions of mast cells, concerning their ability to recognize pathogens via various receptor systems, followed by a coordinated and selective mediator release upon specific interactions with pathogenic stimulating factors. The goal of this review is to direct attention to the possibilities for therapeutic applications of mast cells against bacterial and viral related infections. We also focus on opportunities for future research activating mast cells via adjuvants.
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Affiliation(s)
- Satheesh Natarajan
- Catalysis and Peptide Research Unit, University of KwaZulu-Natal, Westville Campus, E-Block, 6th Floor, Room E1-06-016, Durban, South Africa
| | - Kamini Govender
- Catalysis and Peptide Research Unit, University of KwaZulu-Natal, Westville Campus, E-Block, 6th Floor, Room E1-06-016, Durban, South Africa
| | - Adeola Shobo
- Catalysis and Peptide Research Unit, University of KwaZulu-Natal, Westville Campus, E-Block, 6th Floor, Room E1-06-016, Durban, South Africa
| | - Sooraj Baijnath
- Catalysis and Peptide Research Unit, University of KwaZulu-Natal, Westville Campus, E-Block, 6th Floor, Room E1-06-016, Durban, South Africa
| | - Per I Arvidsson
- Catalysis and Peptide Research Unit, University of KwaZulu-Natal, Westville Campus, E-Block, 6th Floor, Room E1-06-016, Durban, South Africa; Science for Life Laboratory, Drug Discovery and Development, Platform and Division of Translational Medicine and Chemical Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Sweden
| | - Thavendran Govender
- Department of Chemistry, University of Zululand, Private Bag X1001, KwaDlangezwa 3886, South Africa
| | - Johnson Lin
- School of Life Sciences, University of KwaZulu-Natal, Durban 4001, South Africa; School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4001, South Africa
| | - Glenn Em Maguire
- Catalysis and Peptide Research Unit, University of KwaZulu-Natal, Westville Campus, E-Block, 6th Floor, Room E1-06-016, Durban, South Africa
| | - Tricia Naicker
- Catalysis and Peptide Research Unit, University of KwaZulu-Natal, Westville Campus, E-Block, 6th Floor, Room E1-06-016, Durban, South Africa
| | - Hendrik G Kruger
- Catalysis and Peptide Research Unit, University of KwaZulu-Natal, Westville Campus, E-Block, 6th Floor, Room E1-06-016, Durban, South Africa.
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15
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Klose CSN, Veiga-Fernandes H. Neuroimmune interactions in peripheral tissues. Eur J Immunol 2021; 51:1602-1614. [PMID: 33895990 DOI: 10.1002/eji.202048812] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 03/19/2021] [Accepted: 04/21/2021] [Indexed: 12/15/2022]
Abstract
Neuroimmune interactions have been revealed to be at the centre stage of tissue defence, organ homeostasis, and organismal physiology. Neuronal and immune cell subsets have been shown to colocalize in discrete tissue environments, forming neuroimmune cell units that constitute the basis for bidirectional interactions. These multitissue units drive coordinated neuroimmune responses to local and systemic signals, which represents an important challenge to our current views of mucosal physiology and immune regulation. In this review, we focus on the impact of reciprocal neuroimmune interactions, focusing on the anatomy of neuronal innervation and on the neuronal regulation of immune cells in peripheral tissues. Finally, we shed light on recent studies that explore how neuroimmune interactions maximise sensing and integration of environmental aggressions, modulating immune function in health and disease.
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Affiliation(s)
- Christoph S N Klose
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Microbiology, Infectious Diseases and Immunology, Hindenburgdamm 30, Berlin, 12203, Germany
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16
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Chen T, Kong F, Song Y, Tseng H, Jia Y. The effect of acupoint stimulation on T lymphocyte subsets and NK cells in cancer patients: A systematic review and meta-analysis. Eur J Integr Med 2021. [DOI: 10.1016/j.eujim.2021.101309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Inclan-Rico JM, Kim BS, Abdus-Saboor I. Beyond somatosensation: Mrgprs in mucosal tissues. Neurosci Lett 2021; 748:135689. [PMID: 33582191 DOI: 10.1016/j.neulet.2021.135689] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 01/11/2021] [Accepted: 01/19/2021] [Indexed: 11/29/2022]
Abstract
Mas-related G coupled receptors (Mrgprs) are a superfamily of receptors expressed in sensory neurons that are known to transmit somatic sensations from the skin to the central nervous system. Interestingly, Mrgprs have recently been implicated in sensory and motor functions of mucosal-associated neuronal circuits. The gastrointestinal and pulmonary tracts are constantly exposed to noxious stimuli. Therefore, it is likely that neuronal Mrgpr signaling pathways in mucosal tissues, akin to their family members expressed in the skin, might relay messages that alert the host when mucosal tissues are affected by damaging signals. Further, Mrgprs have been proposed to mediate the cross-talk between sensory neurons and immune cells that promotes host-protective functions at barrier sites. Although the mechanisms by which Mrgprs are activated in mucosal tissues are not completely understood, these exciting studies implicate Mrgprs as potential therapeutic targets for conditions affecting the intestinal and airway mucosa. This review will highlight the central role of Mrgpr signaling pathways in the regulation of homeostasis at mucosal tissues.
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Affiliation(s)
- Juan M Inclan-Rico
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Biology, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA, USA
| | - Brian S Kim
- Division of Dermatology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA; Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, USA; Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA; Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, USA.
| | - Ishmail Abdus-Saboor
- Department of Biology, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA, USA.
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18
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Florsheim EB, Sullivan ZA, Khoury-Hanold W, Medzhitov R. Food allergy as a biological food quality control system. Cell 2021; 184:1440-1454. [PMID: 33450204 DOI: 10.1016/j.cell.2020.12.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 10/21/2020] [Accepted: 12/04/2020] [Indexed: 12/17/2022]
Abstract
Food is simultaneously a source of essential nutrients and a potential source of lethal toxins and pathogens. Consequently, multiple sensory mechanisms evolved to monitor the quality of food based on the presence and relative abundance of beneficial and harmful food substances. These include the olfactory, gustatory, and gut chemosensory systems. Here we argue that, in addition to these systems, allergic immunity plays a role in food quality control by mounting allergic defenses against food antigens associated with noxious substances. Exaggeration of these defenses can result in pathological food allergy.
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Affiliation(s)
- Esther B Florsheim
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Zuri A Sullivan
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - William Khoury-Hanold
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Ruslan Medzhitov
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA; Howard Hughes Medical Institute, New Haven, CT 06510, USA.
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19
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Cao TBT, Cha HY, Yang EM, Ye YM. Elevated MRGPRX2 Levels Related to Disease Severity in Patients With Chronic Spontaneous Urticaria. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2021; 13:498-506. [PMID: 33733642 PMCID: PMC7984951 DOI: 10.4168/aair.2021.13.3.498] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/26/2020] [Accepted: 09/19/2020] [Indexed: 01/01/2023]
Abstract
Mas-related G-protein coupled receptor-X2 (MRGPRX2), a receptor on mast cells, basophils, and eosinophils associated with immunoglobulin E (IgE)-independent degranulation, has been reported to be highly expressed on cutaneous mast cells in patients with severe chronic spontaneous urticaria (CSU). We sought to investigate whether MRGPRX2 levels in the sera from CSU patients differ from those in healthy control subjects and to evaluate the clinical utility of MRGPRX2 levels in CSU patients. Severe CSU was defined as urticaria activity score over 7 days (UAS7) ≥ 28. Serum samples from 116 (73 severe and 43 non-severe) CSU patients and 50 healthy subjects were screened for MRGPRX2 using enzyme-linked immunosorbent assay. Serum MRGPRX2 levels were significantly higher in patients with severe CSU (median [interquartile range], 16.5 [10.8–24.8]) than in healthy controls (11.7 [6.5–21.2], P = 0.036) and in non-severe CSU patients (8.7 [4.5–18.8], P = 0.002), although they did not differ between healthy subjects and non-severe CSU patients. Serum MRGPRX2 levels in CSU patients showed positive correlations with UAS7 and specific IgE against Dermatophagoides farinae in CSU subjects, whereas no correlations were observed for age, sex, urticaria duration, atopy, combined angioedema, autologous serum skin test positivity, or total IgE levels. Logistic regression analysis identified serum MRGPRX2 ≥ 12 ng/mL (odds ratio, 6.421; P = 0.002) as an independent risk factor for severe CSU, along with increased serum total IgE levels, peripheral basophil percentage, and angioedema. In conclusion, we suggest that serum MRGPRX2 could help indicate severe CSU.
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Affiliation(s)
- Thi Bich Tra Cao
- Department of Biomedical Science, Ajou University School of Medicine, Suwon, Korea.,Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Hyun Young Cha
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Eun Mi Yang
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Young Min Ye
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea.
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20
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The intestinal neuro-immune axis: crosstalk between neurons, immune cells, and microbes. Mucosal Immunol 2021; 14:555-565. [PMID: 33542493 PMCID: PMC8075967 DOI: 10.1038/s41385-020-00368-1] [Citation(s) in RCA: 112] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 11/16/2020] [Accepted: 11/21/2020] [Indexed: 02/04/2023]
Abstract
The gastrointestinal tract is densely innervated by a complex network of neurons that coordinate critical physiological functions. Here, we summarize recent studies investigating the crosstalk between gut-innervating neurons, resident immune cells, and epithelial cells at homeostasis and during infection, food allergy, and inflammatory bowel disease. We introduce the neuroanatomy of the gastrointestinal tract, detailing gut-extrinsic neuron populations from the spinal cord and brain stem, and neurons of the intrinsic enteric nervous system. We highlight the roles these neurons play in regulating the functions of innate immune cells, adaptive immune cells, and intestinal epithelial cells. We discuss the consequences of such signaling for mucosal immunity. Finally, we discuss how the intestinal microbiota is integrated into the neuro-immune axis by tuning neuronal and immune interactions. Understanding the molecular events governing the intestinal neuro-immune signaling axes will enhance our knowledge of physiology and may provide novel therapeutic targets to treat inflammatory diseases.
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21
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Fattori V, Ferraz CR, Rasquel-Oliveira FS, Verri WA. Neuroimmune communication in infection and pain: Friends or foes? Immunol Lett 2020; 229:32-43. [PMID: 33248166 DOI: 10.1016/j.imlet.2020.11.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 10/02/2020] [Accepted: 11/20/2020] [Indexed: 12/13/2022]
Abstract
Clinically, a variety of micro-organisms cause painful infections. Before seen as bystanders in the context of infections, recent studies have demonstrated that, as immune cells, nociceptors can sense pathogen-derived products. Nociceptors and immune cells, therefore, have evolved to communicate with each other to control inflammatory and host responses against pathogens in a complementary way. This interaction is named as neuroimmune communication (or axon-axon immune reflex) and initiates after the release of neuropeptides, such as CGRP and VIP by neurons. By this neurogenic response, nociceptors orchestrate the activity of innate and adaptive immune cells in a context-dependent manner. In this review, we focus on how nociceptors sense pathogen-derived products to shape the host response. We also highlight the new concept involving the resolution of inflammation, which is related to an active and time-dependent biosynthetic shift from pro-inflammatory to pro-resolution mediators, the so-called specialized pro-resolving lipid mediators (SPMs). At very low doses, SPMs act on specific receptors to silence nociceptors, limit pain and neurogenic responses, and resolve infections. Furthermore, stimulation of the vagus nerve induces SPMs production to regulate immune responses in infections. Therefore, harnessing the current understanding of neuro-immune communication and neurogenic responses might provide the bases for reprogramming host responses against infections through well balanced and effective immune response and inflammation resolution.
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Affiliation(s)
- Victor Fattori
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, PR, Brazil; Vascular Biology Program, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.
| | - Camila R Ferraz
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, PR, Brazil
| | - Fernanda S Rasquel-Oliveira
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, PR, Brazil
| | - Waldiceu A Verri
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, PR, Brazil.
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22
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El Ansari YS, Kanagaratham C, Lewis OL, Oettgen HC. IgE and mast cells: The endogenous adjuvant. Adv Immunol 2020; 148:93-153. [PMID: 33190734 DOI: 10.1016/bs.ai.2020.10.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Mast cells and IgE are most familiar as the effectors of type I hypersensitivity reactions including anaphylaxis. It is becoming clear however that this pair has important immunomodulatory effects on innate and adaptive cells of the immune system. In this purview, they act as endogenous adjuvants to ignite evolving immune responses, promote the transition of allergic disease into chronic illness and disrupt the development of active mechanisms of tolerance to ingested foods. Suppression of IgE-mediated mast cell activation can be exerted by molecules targeting IgE, FcɛRI or signaling kinases including Syk, or by IgG antibodies acting via inhibitory Fcγ receptors. In 2015 we reviewed the evidence for the adjuvant functions of mast cells. This update includes the original text, incorporates some important developments in the field over the past five years and discusses how interventions targeting these pathways might have promise in the development of strategies to treat allergic disease.
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Affiliation(s)
- Yasmeen S El Ansari
- Division of Immunology, Boston Children's Hospital, Boston, MA, United States; Institute of Laboratory Medicine, Philipps University Marburg, Marburg, Germany
| | - Cynthia Kanagaratham
- Division of Immunology, Boston Children's Hospital, Boston, MA, United States; Department of Pediatrics, Harvard Medical School, Boston, MA, United States
| | - Owen L Lewis
- Division of Immunology, Boston Children's Hospital, Boston, MA, United States
| | - Hans C Oettgen
- Division of Immunology, Boston Children's Hospital, Boston, MA, United States; Department of Pediatrics, Harvard Medical School, Boston, MA, United States.
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23
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Ji Y, Hu B, Klontz C, Li J, Dessem D, Dorsey SG, Traub RJ. Peripheral mechanisms contribute to comorbid visceral hypersensitivity induced by preexisting orofacial pain and stress in female rats. Neurogastroenterol Motil 2020; 32:e13833. [PMID: 32155308 PMCID: PMC7319894 DOI: 10.1111/nmo.13833] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/24/2020] [Accepted: 02/18/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Stress exacerbates many chronic pain syndromes including irritable bowel syndrome (IBS). Among these patient populations, many suffer from comorbid or chronic overlapping pain conditions and are predominantly female. Nevertheless, basic studies investigating chronic psychological stress-induced changes in pain sensitivity have been mostly carried out in male rodents. Our laboratory developed a model of comorbid pain hypersensitivity (CPH) (stress in the presence of preexisting orofacial pain inducing chronic visceral pain hypersensitivity that significantly outlasts transient stress-induced pain hypersensitivity (SIH)) facilitating the study of pain associated with IBS. Since CPH and SIH are phenotypically similar until SIH resolves and CPH persists, it is unclear if underlying mechanisms are similar. METHODS In the present study, the visceromotor response (VMR) to colorectal distention was recorded in the SIH and CPH models in intact females and ovariectomized rats plus estradiol replacement (OVx + E2). Over several months, rats were determined to be susceptible or resilient to stress and the role of peripheral corticotrophin-releasing factor (CRF) underlying in the pain hypersensitivity was examined. KEY RESULTS Stress alone induced transient (3-4 weeks) visceral hypersensitivity, though some rats were resilient. Comorbid conditions increased susceptibility to stress prolonging hypersensitivity beyond 13 weeks. Both models had robust peripheral components; hypersensitivity was attenuated by the CRF receptor antagonist astressin and the mast cell stabilizer disodium cromoglycate (DSCG). However, DSCG was less effective in the CPH model compared to the SIH model. CONCLUSIONS AND INFERENCES The data indicate many similarities but some differences in mechanisms contributing to comorbid pain conditions compared to transient stress-induced pain.
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Affiliation(s)
- Yaping Ji
- Department of Neural and Pain SciencesSchool of DentistryUniversity of Maryland BaltimoreBaltimoreMDUSA
| | - Bo Hu
- Department of Neural and Pain SciencesSchool of DentistryUniversity of Maryland BaltimoreBaltimoreMDUSA,Present address:
Key laboratory of Shaanxi Province for Craniofacial Precision Medicine ResearchXi’an Jiao Tong University College of StomatologyXi’anShaanxiChina
| | - Charles Klontz
- Department of Neural and Pain SciencesSchool of DentistryUniversity of Maryland BaltimoreBaltimoreMDUSA
| | - Jiyun Li
- Department of Neural and Pain SciencesSchool of DentistryUniversity of Maryland BaltimoreBaltimoreMDUSA
| | - Dean Dessem
- Department of Neural and Pain SciencesSchool of DentistryUniversity of Maryland BaltimoreBaltimoreMDUSA,UM Center to Advance Chronic Pain ResearchUniversity of Maryland BaltimoreBaltimoreMDUSA
| | - Susan G. Dorsey
- UM Center to Advance Chronic Pain ResearchUniversity of Maryland BaltimoreBaltimoreMDUSA,Department of Pain and Translational Symptom ScienceSchool of NursingUniversity of Maryland BaltimoreBaltimoreMDUSA
| | - Richard J. Traub
- Department of Neural and Pain SciencesSchool of DentistryUniversity of Maryland BaltimoreBaltimoreMDUSA,UM Center to Advance Chronic Pain ResearchUniversity of Maryland BaltimoreBaltimoreMDUSA
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24
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Jakob MO, Murugan S, Klose CSN. Neuro-Immune Circuits Regulate Immune Responses in Tissues and Organ Homeostasis. Front Immunol 2020; 11:308. [PMID: 32265899 PMCID: PMC7099652 DOI: 10.3389/fimmu.2020.00308] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 02/07/2020] [Indexed: 12/12/2022] Open
Abstract
The dense innervation of the gastro-intestinal tract with neuronal networks, which are in close proximity to immune cells, implies a pivotal role of neurons in modulating immune functions. Neurons have the ability to directly sense danger signals, adapt immune effector functions and integrate these signals to maintain tissue integrity and host defense strategies. The expression pattern of a large set of immune cells in the intestine characterized by receptors for neurotransmitters and neuropeptides suggest a tight neuronal hierarchical control of immune functions in order to systemically control immune reactions. Compelling evidence implies that targeting neuro-immune interactions is a promising strategy to dampen immune responses in autoimmune diseases such as inflammatory bowel diseases or rheumatoid arthritis. In fact, electric stimulation of vagal fibers has been shown to be an extremely effective treatment strategy against overwhelming immune reactions, even after exhausted conventional treatment strategies. Such findings argue that the nervous system is underestimated coordinator of immune reactions and underline the importance of neuro-immune crosstalk for body homeostasis. Herein, we review neuro-immune interactions with a special focus on disease pathogenesis throughout the gastro-intestinal tract.
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Affiliation(s)
- Manuel O. Jakob
- Department of Microbiology, Infectious Diseases and Immunology, Charité - Universitätsmedizin Berlin, Berlin, Germany
- Group of Visceral Surgery and Medicine, Department of BioMedical Research, University of Bern, Bern, Switzerland
| | - Shaira Murugan
- Group of Visceral Surgery and Medicine, Department of BioMedical Research, University of Bern, Bern, Switzerland
| | - Christoph S. N. Klose
- Department of Microbiology, Infectious Diseases and Immunology, Charité - Universitätsmedizin Berlin, Berlin, Germany
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25
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Stakenborg N, Viola MF, Boeckxstaens GE. Intestinal neuro-immune interactions: focus on macrophages, mast cells and innate lymphoid cells. Curr Opin Neurobiol 2019; 62:68-75. [PMID: 31862627 PMCID: PMC7294228 DOI: 10.1016/j.conb.2019.11.020] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 11/19/2019] [Accepted: 11/25/2019] [Indexed: 12/27/2022]
Abstract
Neuro-immune crosstalk occurs in distinct anatomical niches in the intestine. Neuro-immune cell niches maintain gut homeostasis and modulate inflammation. Neuron-macrophage crosstalk in the muscularis is crucial for neuronal survival and peristalsis. Mast cell mediators activate and sensitize nerve terminals, leading to aberrant pain perception. Neurons modulate ILC function during infection and inflammation.
Intestinal homeostasis relies on the reciprocal crosstalk between enteric neurons and immune cells, which together form neuro-immune units that occupy distinct anatomical niches within the gut. Here we will review the recent advances in our understanding of neuro-immune crosstalk within the gut, with focus on macrophages, mast cells and innate lymphoid cells. In particular, we will discuss the role of neuron-immune cell crosstalk in homeostasis, and how aberrant communication may underlie disease in the gastro-intestinal tract.
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Affiliation(s)
- Nathalie Stakenborg
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Maria F Viola
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium
| | - Guy E Boeckxstaens
- Department of Chronic Diseases, Metabolism and Ageing, Translational Research Center for GastroIntestinal Disorders, Intestinal Neuroimmune Interactions, University of Leuven, Leuven, Belgium.
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26
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27
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Coeliac Disease and Mast Cells. Int J Mol Sci 2019; 20:ijms20143400. [PMID: 31373285 PMCID: PMC6678566 DOI: 10.3390/ijms20143400] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 07/05/2019] [Accepted: 07/08/2019] [Indexed: 01/01/2023] Open
Abstract
Over the last decades, there has been an impressive progress in our understanding of coeliac disease pathogenesis and it has become clear that the disorder is the final result of complex interactions of environmental, genetic, and immunological factors. Coeliac disease is now considered a prototype of T-cell-mediated disease characterized by loss of tolerance to dietary gluten and the targeted killing of enterocytes by T-cell receptor αβ intraepithelial lymphocytes. Accumulating evidence, however, indicates that the induction of a gluten-specific T helper-1 response must be preceded by the activation of the innate immune system. Mast cells are key players of the innate immune response and contribute to the pathogenesis of a multitude of diseases. Here, we review the results of studies aimed at investigating the role of mast cells in the pathogenesis of coeliac disease, showing that these cells increase in number during the progression of the disease and contribute to define a pro-inflammatory microenvironment.
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Wallrapp A, Riesenfeld SJ, Burkett PR, Kuchroo VK. Type 2 innate lymphoid cells in the induction and resolution of tissue inflammation. Immunol Rev 2019; 286:53-73. [PMID: 30294962 DOI: 10.1111/imr.12702] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 08/08/2018] [Indexed: 12/14/2022]
Abstract
Type 2 immunity against pathogens is tightly regulated to ensure appropriate inflammatory responses that clear infection and prevent excessive tissue damage. Recent research has shown that type 2 innate lymphoid cells (ILC2s) contribute to steady-state tissue integrity and exert tissue-specific functions. However, upon exposure to inflammatory stimuli, they also initiate and amplify type 2 inflammation by inducing mucus production, eosinophilia, and Th2 differentiation. In this review, we discuss the regulation of ILC2 activation by transcription factors and metabolic pathways, as well as by extrinsic signals such as cytokines, lipid mediators, hormones, and neuropeptides. We also review recent discoveries about ILC2 plasticity and heterogeneity in different tissues, as revealed partly through single-cell RNA sequencing of transcriptional responses to various stimuli. Understanding the tissue-specific pathways that regulate ILC2 diversity and function is a critical step in the development of potential therapies for allergic diseases.
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Affiliation(s)
- Antonia Wallrapp
- Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham & Women's Hospital, Boston, Massachusetts
| | - Samantha J Riesenfeld
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Patrick R Burkett
- Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham & Women's Hospital, Boston, Massachusetts.,Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham & Women's Hospital, Boston, Massachusetts
| | - Vijay K Kuchroo
- Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham & Women's Hospital, Boston, Massachusetts.,Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, Massachusetts.,Department of Neurology, Brigham & Women's Hospital, Boston, Massachusetts
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Flores JA, Ramírez-Ponce MP, Montes MÁ, Balseiro-Gómez S, Acosta J, Álvarez de Toledo G, Alés E. Proteoglycans involved in bidirectional communication between mast cells and hippocampal neurons. J Neuroinflammation 2019; 16:107. [PMID: 31109355 PMCID: PMC6528191 DOI: 10.1186/s12974-019-1504-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 05/08/2019] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Mast cells (MCs) in the brain can respond to environmental cues and relay signals to neurons that may directly influence neuronal electrical activity, calcium signaling, and neurotransmission. MCs also express receptors for neurotransmitters and consequently can be activated by them. Here, we developed a coculture model of peritoneal MCs, incubated together with dissociated hippocampal neurons for the study of cellular mechanisms involved in the mast cell-neuron interactions. METHODS Calcium imaging was used to simultaneously record changes in intracellular calcium [Ca2+]i in neurons and MCs. To provide insight into the contribution of MCs on neurotransmitter release in rat hippocampal neurons, we used analysis of FM dye release, evoked by a cocktail of mediators from MCs stimulated by heat. RESULTS Bidirectional communication is set up between MCs and hippocampal neurons. Neuronal depolarization caused intracellular calcium [Ca2+]i oscillations in MCs that produced a quick response in neurons. Furthermore, activation of MCs with antigen or the secretagogue compound 48/80 also resulted in a neuronal [Ca2+]i response. Moreover, local application onto neurons of the MC mediator cocktail elicited Ca2+ transients and a synaptic release associated with FM dye destaining. Neuronal response was partially blocked by D-APV, a N-methyl-D-aspartate receptor (NMDAR) antagonist, and was inhibited when the cocktail was pre-digested with chondroitinase ABC, which induces enzymatic removal of proteoglycans of chondroitin sulfate (CS). CONCLUSIONS MC-hippocampal neuron interaction affects neuronal [Ca2+]i and exocytosis signaling through a NMDAR-dependent mechanism.
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Affiliation(s)
- Juan Antonio Flores
- Dpto. de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Av. Sánchez Pizjuán 4, 41009 Sevilla, Spain
| | - María Pilar Ramírez-Ponce
- Dpto. de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Av. Sánchez Pizjuán 4, 41009 Sevilla, Spain
| | - María Ángeles Montes
- Dpto. de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Av. Sánchez Pizjuán 4, 41009 Sevilla, Spain
| | - Santiago Balseiro-Gómez
- Dpto. de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Av. Sánchez Pizjuán 4, 41009 Sevilla, Spain
- Present Address: Department of Neuroscience, Yale School of Medicine, 295 Congress Avenue, New Haven, CT 06510 USA
| | - Jorge Acosta
- Dpto. de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Av. Sánchez Pizjuán 4, 41009 Sevilla, Spain
| | - Guillermo Álvarez de Toledo
- Dpto. de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Av. Sánchez Pizjuán 4, 41009 Sevilla, Spain
| | - Eva Alés
- Dpto. de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Av. Sánchez Pizjuán 4, 41009 Sevilla, Spain
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Meixiong J, Anderson M, Limjunyawong N, Sabbagh MF, Hu E, Mack MR, Oetjen LK, Wang F, Kim BS, Dong X. Activation of Mast-Cell-Expressed Mas-Related G-Protein-Coupled Receptors Drives Non-histaminergic Itch. Immunity 2019; 50:1163-1171.e5. [PMID: 31027996 DOI: 10.1016/j.immuni.2019.03.013] [Citation(s) in RCA: 199] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 10/24/2018] [Accepted: 03/14/2019] [Indexed: 11/28/2022]
Abstract
Classical itch studies have focused on immunoglobulin E (IgE)-mediated mast cell activation and histamine release. Recently, members of the Mas-related G-protein-coupled receptor (Mrgpr) family have been identified as mast cell receptors, but their role in itch is unclear. Here, we report that mast cell activation via Mrgprb2 evoked non-histaminergic itch in mice independently of the IgE-Fc epsilon RI (FcεRI)-histamine axis. Compared with IgE-FcεRI stimulation, Mrgprb2 activation of mast cells was distinct in both released substances (histamine, serotonin, and tryptase) and the pattern of activated itch-sensory neurons. Mrgprb2 deficiency decreased itch in multiple preclinical models of allergic contact dermatitis (ACD), a pruritic inflammatory skin disorder, and both mast cell number and PAMP1-20 concentrations (agonist of the human Mrgprb2 homolog, MRGPRX2) were increased in human ACD skin. These findings suggest that this pathway may represent a therapeutic target for treating ACD and mast-cell-associated itch disorders in which antihistamines are ineffective.
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Affiliation(s)
- James Meixiong
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Michael Anderson
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Nathachit Limjunyawong
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Mark F Sabbagh
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Eric Hu
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Madison R Mack
- Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO 63110, USA; Division of Dermatology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Landon K Oetjen
- Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO 63110, USA; Division of Dermatology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Fang Wang
- Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO 63110, USA; Division of Dermatology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Brian S Kim
- Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO 63110, USA; Division of Dermatology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.
| | - Xinzhong Dong
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Howard Hughes Medical Institute.
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The Dynamics of the Skin's Immune System. Int J Mol Sci 2019; 20:ijms20081811. [PMID: 31013709 PMCID: PMC6515324 DOI: 10.3390/ijms20081811] [Citation(s) in RCA: 276] [Impact Index Per Article: 55.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/09/2019] [Accepted: 04/09/2019] [Indexed: 12/12/2022] Open
Abstract
The skin is a complex organ that has devised numerous strategies, such as physical, chemical, and microbiological barriers, to protect the host from external insults. In addition, the skin contains an intricate network of immune cells resident to the tissue, crucial for host defense as well as tissue homeostasis. In the event of an insult, the skin-resident immune cells are crucial not only for prevention of infection but also for tissue reconstruction. Deregulation of immune responses often leads to impaired healing and poor tissue restoration and function. In this review, we will discuss the defensive components of the skin and focus on the function of skin-resident immune cells in homeostasis and their role in wound healing.
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Xu Y, Huang C, Deng H, Jia J, Wu Y, Yang J, Tu W. TRPA1 and substance P mediate stress induced duodenal lesions in water immersion restraint stress rat model. TURKISH JOURNAL OF GASTROENTEROLOGY 2019; 29:692-700. [PMID: 30381276 DOI: 10.5152/tjg.2018.17817] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND/AIMS Transient receptor potential ankyrin 1 (TRPA1) and substance P (SP), both expression in sensory neurons, have important roles in stress-induced duodenal lesions. The possible contribution of TRPA1 and SP to stress-induced duodenal lesions was explored by using the water immersion restraint stress (WIRS) rat model. MATERIALS AND METHODS Western blotting, Real-time polymerase chain reaction (RT-PCR), and immunohistochemistry assay were used to evaluate the changes of TRPA1and SP expression in the dorsal root ganglia (DRG, T8-11), the corresponding segment of the spinal cord (T8-11), and the duodenum in a duodenal lesions rat model. The SP concentrations of duodenal mucosa were investigated using an enzyme-linked immunosorbent assay (ELISA). Duodenal lesions were assessed according to histopathological changes. TRPA1 specific antagonist HC-030031 was intrathecally or intraperitoneally performed to suppress the expression of both TRPA1 and SP for evaluating the roles of TRPA1 and SP in duodenal lesions. RESULTS In contrast to the control group, TRPA1 and substance P in the DRG (T8-11) and duodenum were up-regulated, and concentrations of SP in the duodenal mucosa were increased after WIRS (p<0.05), which are closely associated with duodenal lesions. SP concentrations in the duodenal mucosa were decreased and duodenal lesions were alleviated by pretreatment with TRPA1 antagonist HC-030031. We identified a protective role for HC-030031 in WIRS-induced duodenal lesions. Furthermore, we demonstrated that WIRS increased the concentrations of SP in the duodenal mucosa in a TRPA1-dependent manner. However, WIRS caused no significant changes of TRPA1 and SP in the spinal cord (T8-11) compared with the control group (p>0.05). CONCLUSION Our study indicates that TRPA1 antagonist HC-030031 alleviates duodenal lesions. TRPA1 is activated and sensitized, therefore concomitant neuropeptide SP is released, which exerts a critical role in inducing and maintaining duodenal lesions following WIRS in rats. This provides evidence that neuroimmune interactions may control duodenal injury. TRPA1 may be a potential drug target to inhibit the development of duodenal lesions by stress-induced in patients.
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Affiliation(s)
- Yan Xu
- Department of Anesthesiology, Guangzhou General Hospital of Guangzhou Military Command, Guangdong, China; The 173rd Clinical Department of PLA 421rd Hospital, Guangdong, China
| | - Caiqun Huang
- The 173rd Clinical Department of PLA 421rd Hospital, Guangdong, China
| | - Hui Deng
- Department of Anesthesiology, Guangzhou General Hospital of Guangzhou Military Command, Guangdong, China
| | - Ji Jia
- Department of Anesthesiology, Guangzhou General Hospital of Guangzhou Military Command, Guangdong, China
| | - Youping Wu
- Department of Anesthesiology, Guangzhou General Hospital of Guangzhou Military Command, Guangdong, China
| | - Jing Yang
- Department of Anesthesiology, Guangzhou General Hospital of Guangzhou Military Command, Guangdong, China
| | - Weifeng Tu
- Department of Anesthesiology, Guangzhou General Hospital of Guangzhou Military Command, Guangdong, China
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Aller MA, Arias N, Blanco-Rivero J, Arias JL, Arias J. Hepatic encephalopathy: Sometimes more portal than hepatic. J Gastroenterol Hepatol 2019; 34:490-494. [PMID: 30345537 DOI: 10.1111/jgh.14514] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 10/08/2018] [Indexed: 12/29/2022]
Abstract
Hepatic encephalopathy is a severe complication of both chronic and acute liver diseases. The term hepatic encephalopathy stems from the belief that hepatic insufficiency is its fundamental etiopathogenic factor. However, most clinical cases show liver failure along with mesenteric venous portal hypertension. This portal hypertension would explain the abnormal mechanical forces suffered by the digestive tract in the early stages of the disorder. These forces could regulate some gut biochemical pathological pathways in a process known as mechanotransduction. Thus, portal hypertension would begin with the establishment of a mechanotransduced afferent or sensory inflammatory gut-brain pathway, resulting in functional and structural changes in the central nervous system. In this review, we will revisit the term "hepatic encephalopathy" in light of new results where portal hypertension occurs before liver failure and is accompanied by brain changes. Moreover, we will point out cellular links that can explain the microbiota, immune, gut, and brain axis disturbances found in this disorder.
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Affiliation(s)
- Maria-Angeles Aller
- Department of Surgery, School of Medicine, Complutense University of Madrid, Madrid, Spain
| | - Natalia Arias
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,INEUROPA (Instituto de Neurociencias del Principado de Asturias), Oviedo, Spain
| | - Javier Blanco-Rivero
- Department of Physiology, School of Medicine, Instituto de Investigación Sanitaria del Hospital Universitario La Paz (Idi PAZ), Autonoma University of Madrid, Madrid, Spain
| | - Jorge L Arias
- INEUROPA (Instituto de Neurociencias del Principado de Asturias), Oviedo, Spain.,Laboratory of Neuroscience, Department of Psychology, University of Oviedo, Asturias, Spain
| | - Jaime Arias
- Department of Surgery, School of Medicine, Complutense University of Madrid, Madrid, Spain
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Chesné J, Cardoso V, Veiga-Fernandes H. Neuro-immune regulation of mucosal physiology. Mucosal Immunol 2019; 12:10-20. [PMID: 30089849 DOI: 10.1038/s41385-018-0063-y] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 06/15/2018] [Accepted: 06/25/2018] [Indexed: 02/07/2023]
Abstract
Mucosal barriers constitute major body surfaces that are in constant contact with the external environment. Mucosal sites are densely populated by a myriad of distinct neurons and immune cell types that sense, integrate and respond to multiple environmental cues. In the recent past, neuro-immune interactions have been reported to play central roles in mucosal health and disease, including chronic inflammatory conditions, allergy and infectious diseases. Discrete neuro-immune cell units act as building blocks of this bidirectional multi-tissue cross-talk, ensuring mucosal tissue health and integrity. Herein, we will focus on reciprocal neuro-immune interactions in the airways and intestine. Such neuro-immune cross-talk maximizes sensing and integration of environmental aggressions, which can be considered an important paradigm shift in our current views of mucosal physiology and immune regulation.
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Affiliation(s)
- Julie Chesné
- Champalimaud Research, Champalimaud Centre for the Unknown, 1400-038, Lisboa, Portugal
| | - Vânia Cardoso
- Champalimaud Research, Champalimaud Centre for the Unknown, 1400-038, Lisboa, Portugal
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Fornai M, van den Wijngaard RM, Antonioli L, Pellegrini C, Blandizzi C, de Jonge WJ. Neuronal regulation of intestinal immune functions in health and disease. Neurogastroenterol Motil 2018; 30:e13406. [PMID: 30058092 DOI: 10.1111/nmo.13406] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 06/11/2018] [Indexed: 12/26/2022]
Abstract
BACKGROUND Nerve-mucosa interactions control various elements of gastrointestinal functions, including mucosal host defense, gut barrier function, and epithelial cell growth and differentiation. In both intestinal and extra-intestinal diseases, alterations of autonomic nerve activity have been observed to be concurrent with the disease course, such as in inflammatory and functional bowel diseases, and neurodegenerative diseases. This is relevant as the extrinsic autonomic nervous system is increasingly recognized to modulate gut inflammatory responses. The molecular and cellular mechanisms through which the extrinsic and intrinsic nerve pathways may regulate digestive mucosal functions have been investigated in several pre-clinical and clinical studies. PURPOSE The present review focuses on the involvement of neural pathways in gastrointestinal disease, and addresses the current strategies to intervene with neuronal pathway as a means of treatment.
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Affiliation(s)
- M Fornai
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy.,Department of Gastroenterology and Hepatology, Tytgat Institute for Liver and Intestinal Research, Academic Medical Center, Amsterdam, The Netherlands
| | - R M van den Wijngaard
- Department of Gastroenterology and Hepatology, Tytgat Institute for Liver and Intestinal Research, Academic Medical Center, Amsterdam, The Netherlands
| | - L Antonioli
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - C Pellegrini
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - C Blandizzi
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - W J de Jonge
- Department of Gastroenterology and Hepatology, Tytgat Institute for Liver and Intestinal Research, Academic Medical Center, Amsterdam, The Netherlands
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Abstract
The interplay between the immune and nervous systems has been acknowledged in the past, but only more recent studies have started to unravel the cellular and molecular players of such interactions. Mounting evidence indicates that environmental signals are sensed by discrete neuro-immune cell units (NICUs), which represent defined anatomical locations in which immune and neuronal cells colocalize and functionally interact to steer tissue physiology and protection. These units have now been described in multiple tissues throughout the body, including lymphoid organs, adipose tissue, and mucosal barriers. As such, NICUs are emerging as important orchestrators of multiple physiological processes, including hematopoiesis, organogenesis, inflammation, tissue repair, and thermogenesis. In this review we focus on the impact of NICUs in tissue physiology and how this fast-evolving field is driving a paradigm shift in our understanding of immunoregulation and organismal physiology.
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Affiliation(s)
- Cristina Godinho-Silva
- Champalimaud Research, Champalimaud Centre for the Unknown, 1400-038 Lisboa, Portugal; , ,
| | - Filipa Cardoso
- Champalimaud Research, Champalimaud Centre for the Unknown, 1400-038 Lisboa, Portugal; , ,
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Xu Y, Jia J, Xie C, Wu Y, Tu W. Transient Receptor Potential Ankyrin 1 and Substance P Mediate the Development of Gastric Mucosal Lesions in a Water Immersion Restraint Stress Rat Model. Digestion 2018; 97:228-239. [PMID: 29428952 DOI: 10.1159/000484980] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 11/04/2017] [Indexed: 02/04/2023]
Abstract
BACKGROUND Activation of substance P (SP) contributes to the development and maintenance of gastric lesions, but the mechanisms underlying the release of SP and SP-mediated damage to the gastric mucosa remain unknown. Transient receptor potential ankyrin 1 (TRPA1) is expressed in SP-positive neurons in the dorsal root ganglion (DRG) and stomach of rats. We hypothesized that water immersion restraint stress (WIRS) may activate and sensitize TRPA1 in DRG neurons, subsequently inducing the release of SP from DRG and stomach cells, causing the development of acute gastric mucosal lesions (AGML). METHODS Changes in TRPA1 and SP expression in T8-11 DRG sensory neurons and the stomach in an AGML rat model were determined by reverse transcription polymerase chain reaction, western blotting and immunohistochemistry. The SP levels of serum and gastric mucosa were measured by using an enzyme-linked immunosorbent assay (ELISA). Gastric lesions were evaluated by histopathological changes. The TRPA1 antagonist HC-030031 and TRPA1 agonists allyl isothiocyanate were used to verify effect of TRPA1 and SP on AGML. RESULTS SP and TRPA1 in the DRG and stomach were upregulated, and the serum and gastric mucosa levels of SP were increased after WIRS, which are closely associated with AGML. The release of SP was suppressed and AGML were alleviated following a selective TRPA1 antagonist HC-030031. TRPA1 agonists AITC increased release of SP and led to moderate gastric lesions. We confirmed that WIRS induced the release of SP in the DRG, stomach, serum and gastric mucosa, and in a TRPA1-dependent manner. CONCLUSIONS Upregulated SP and TRPA1 in the DRG and stomach and increased serum and gastric mucosa SP levels may contribute to stress-induced AGML. TRPA1 is a potential drug target to reduce stress-induced AGML development in patients with acute critical illnesses. This study may contribute to the discovery of drugs for AGML treatment.
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Affiliation(s)
- Yan Xu
- Department of anesthesiology, Guangzhou General Hospital of Guangzhou Military Command, The Second Military Medical University, Guangzhou, China.,Department of Anesthesiology, the 173rd Clinical Department of PLA, 421rd Hospital, Huizhou, China
| | - Ji Jia
- Department of anesthesiology, Guangzhou General Hospital of Guangzhou Military Command, The Second Military Medical University, Guangzhou, China
| | - Chuangbo Xie
- Department of anesthesiology, Guangzhou General Hospital of Guangzhou Military Command, The Second Military Medical University, Guangzhou, China
| | - Youping Wu
- Department of anesthesiology, Guangzhou General Hospital of Guangzhou Military Command, The Second Military Medical University, Guangzhou, China
| | - Weifeng Tu
- Department of anesthesiology, Guangzhou General Hospital of Guangzhou Military Command, The Second Military Medical University, Guangzhou, China
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Zielińska A, Sałaga M, Włodarczyk M, Fichna J. Chronic abdominal pain in irritable bowel syndrome - current and future therapies. Expert Rev Clin Pharmacol 2018; 11:729-739. [PMID: 29957084 DOI: 10.1080/17512433.2018.1494571] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
INTRODUCTION Irritable bowel syndrome (IBS) is a functional gut disorder that typically manifests in early adult years. One of the two major symptoms of the disease is chronic, visceral pain. The patients report pain as the most distressing symptom with the greatest impact on quality of life, challenging both to patients and healthcare providers. Areas covered: This review focuses on the pathophysiology of abdominal pain in IBS and describes current treatment possibilities. It also covers latest findings that may lead to novel pharmacological options in IBS pain management. Expert commentary: Pain is the main contributor to severity in IBS. Seeking pain alleviation is the most common reason that IBS sufferers consult with their physicians. Not all patients report being satisfied with available treatments for pain in IBS and there is a pressing need to find new, more efficient therapies for this syndrome.
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Affiliation(s)
- Anna Zielińska
- a Department of Biochemistry, Faculty of Medicine , Medical University of Lodz , Lodz , Poland
| | - Maciej Sałaga
- a Department of Biochemistry, Faculty of Medicine , Medical University of Lodz , Lodz , Poland
| | - Marcin Włodarczyk
- a Department of Biochemistry, Faculty of Medicine , Medical University of Lodz , Lodz , Poland.,b Department of General and Colorectal Surgery, Faculty of Military Medicine , Medical University of Lodz , Lodz , Poland
| | - Jakub Fichna
- a Department of Biochemistry, Faculty of Medicine , Medical University of Lodz , Lodz , Poland
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Abdellah N, van Remoortel S, Mohey-Elsaeed O, Mustafa MN, Ahmed YA, Timmermans JP, Buckinx R. Neuropeptide AF Induces Piecemeal Degranulation in Murine Mucosal Mast Cells: A New Mediator in Neuro-Immune Communication in the Intestinal Lamina Propria? Anat Rec (Hoboken) 2018; 301:1103-1114. [DOI: 10.1002/ar.23780] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 10/25/2017] [Accepted: 12/11/2017] [Indexed: 12/30/2022]
Affiliation(s)
- Nada Abdellah
- Histology Department, Faculty of Veterinary Medicine; Sohag University; Sohag Egypt
- Laboratory of Cell Biology & Histology, University of Antwerp; Antwerp Belgium
| | | | - Omnia Mohey-Elsaeed
- Laboratory of Cell Biology & Histology, University of Antwerp; Antwerp Belgium
- Department of Cytology and Histology, Faculty of Veterinary Medicine; Cairo University; Giza 12122 Egypt
| | - Mohamed-Nabil Mustafa
- Department of Anatomy and Histology, Faculty of Veterinary Medicine; Assiut University; Assiut Egypt
| | - Yasser A. Ahmed
- Department of Histology, Faculty of Veterinary Medicine; South Valley University; Qena Egypt
| | | | - Roeland Buckinx
- Laboratory of Cell Biology & Histology, University of Antwerp; Antwerp Belgium
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Impact of mast cells in mucosal immunity of intestinal inflammation: Inhibitory effect of IL-37. Eur J Pharmacol 2018; 818:294-299. [DOI: 10.1016/j.ejphar.2017.09.044] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 09/28/2017] [Accepted: 09/28/2017] [Indexed: 01/10/2023]
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Affiliation(s)
- Giovanna Traina
- Department of Pharmaceutical Sciences, University of Perugia, Via S. Costanzo, 06126 Perugia, Italy. Tel.: ; Fax: ; E-mail:
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Association of inflammatory mediators with pain perception. Biomed Pharmacother 2017; 96:1445-1452. [DOI: 10.1016/j.biopha.2017.12.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 12/01/2017] [Accepted: 12/01/2017] [Indexed: 12/31/2022] Open
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Veiga-Fernandes H, Freitas AA. The S(c)ensory Immune System Theory. Trends Immunol 2017; 38:777-788. [DOI: 10.1016/j.it.2017.02.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/09/2017] [Accepted: 02/15/2017] [Indexed: 01/21/2023]
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Veiga-Fernandes H, Pachnis V. Neuroimmune regulation during intestinal development and homeostasis. Nat Immunol 2017; 18:116-122. [DOI: 10.1038/ni.3634] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 11/07/2016] [Indexed: 12/22/2022]
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Veiga-Fernandes H, Mucida D. Neuro-Immune Interactions at Barrier Surfaces. Cell 2017; 165:801-11. [PMID: 27153494 DOI: 10.1016/j.cell.2016.04.041] [Citation(s) in RCA: 173] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Indexed: 12/23/2022]
Abstract
Multidirectional interactions between the nervous and immune systems have been documented in homeostasis and pathologies ranging from multiple sclerosis to autism, and from leukemia to acute and chronic inflammation. Recent studies have addressed this crosstalk using cell-specific targeting, novel sequencing, imaging, and analytical tools, shedding light on unappreciated mechanisms of neuro-immune regulation. This Review focuses on neuro-immune interactions at barrier surfaces-mostly the gut, but also including the skin and the airways, areas densely populated by neurons and immune cells that constantly sense and adapt to tissue-specific environmental challenges.
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Affiliation(s)
- Henrique Veiga-Fernandes
- Instituto de Medicina Molecular, Faculdade de Medicina de Lisboa, Av. Prof. Egas Moniz, Edifício Egas Moniz, 1649-028 Lisboa, Portugal.
| | - Daniel Mucida
- Laboratory of Mucosal Immunology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.
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Sato H, Zhang LS, Martinez K, Chang EB, Yang Q, Wang F, Howles PN, Hokari R, Miura S, Tso P. Antibiotics Suppress Activation of Intestinal Mucosal Mast Cells and Reduce Dietary Lipid Absorption in Sprague-Dawley Rats. Gastroenterology 2016; 151:923-932. [PMID: 27436071 PMCID: PMC5391873 DOI: 10.1053/j.gastro.2016.07.009] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 06/28/2016] [Accepted: 07/08/2016] [Indexed: 01/04/2023]
Abstract
BACKGROUND & AIMS The gut microbiota affects intestinal permeability and mucosal mast cells (MMCs) responses. Activation of MMCs has been associated with absorption of dietary fat. We investigated whether the gut microbiota contributes to the fat-induced activation of MMCs in rats, and how antibiotics might affect this process. METHODS Adult male Sprague-Dawley rats were given streptomycin and penicillin for 4 days (n = 6-8) to reduce the abundance of their gut flora, or normal drinking water (controls, n = 6-8). They underwent lymph fistula surgery and after an overnight recovery were given an intraduodenal bolus of intralipid. We collected intestinal tissues and lymph fluid and assessed activation of MMCs, intestinal permeability, and fat transport parameters. RESULTS Compared with controls, intestinal lymph from rats given antibiotics had reduced levels of mucosal mast cell protease II (produced by MMCs) and decreased activity of diamine oxidase (produced by enterocytes) (P < .05). Rats given antibiotics had reduced intestinal permeability in response to dietary lipid compared with controls (P < .01). Unexpectedly, antibiotics also reduced lymphatic transport of triacylglycerol and phospholipid (P < .01), concomitant with decreased levels of mucosal apolipoproteins B, A-I, and A-IV (P < .01). No differences were found in intestinal motility or luminal pancreatic lipase activity between rats given antibiotics and controls. These effects were not seen with an acute dose of antibiotics or 4 weeks after the antibiotic regimen ended. CONCLUSIONS The intestinal microbiota appears to activate MMCs after the ingestion of fat in rats; this contributes to fat-induced intestinal permeability. We found that the gut microbiome promotes absorption of lipid, probably by intestinal production of apolipoproteins and secretion of chylomicrons.
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Affiliation(s)
- Hirokazu Sato
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio; Department of Internal Medicine, National Defense Medical College, Saitama, Japan
| | - Linda S Zhang
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Kristina Martinez
- Department of Medicine, Section of Gastroenterology, Hepatology, and Nutrition, University of Chicago, Chicago, Illinois
| | - Eugene B Chang
- Department of Medicine, Section of Gastroenterology, Hepatology, and Nutrition, University of Chicago, Chicago, Illinois
| | - Qing Yang
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Fei Wang
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Philip N Howles
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Ryota Hokari
- Department of Internal Medicine, National Defense Medical College, Saitama, Japan
| | - Soichiro Miura
- Department of Internal Medicine, National Defense Medical College, Saitama, Japan
| | - Patrick Tso
- Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio.
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Kwon JY, Lee HS, Joo CK. TRPV1 Antagonist Suppresses Allergic Conjunctivitis in a Murine Model. Ocul Immunol Inflamm 2016; 26:440-448. [PMID: 27726468 DOI: 10.1080/09273948.2016.1231330] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE To determine the immunologic functions of TRPA1 or TRPV1 in allergic conjunctivitis (AC). METHODS Mice were sensitized with ovalbumin (OVA), after which TRPA1 antagonist or TRPV1 antagonist was administered before topical OVA challenge. Expression of TRPV1 or TRPA1 in AC was examined by western blotting and multicolor immunofluorescence. Clinical signs, OVA-specific IgE, infiltration of inflammatory cells into conjunctivae (CJs), and Th2 cytokine in draining lymph nodes (LNs) were evaluated by microscopy, flow cytometry, and ELISA. RESULTS TRPV1 expression was increased in CJs and LNs from AC mice, but TRPA1 expression was only increased in LNs. TRPV1 antagonist but not TRPA1 antagonist attenuated the clinical signs of AC and OVA-specific IgE in sera. TRPV1 antagonist furthermore inhibited the infiltration of inflammatory cells into CJ and the production of Th2 cytokines in LNs. CONCLUSION TRPV1 antagonist but not TRPA1 antagonist may ameliorate AC by suppressing the Th2 response in LNs.
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Affiliation(s)
- Ji Young Kwon
- a Catholic Institute for Visual Science , Seoul St. Mary's Hospital , Seoul , Republic of Korea
| | - Hyun Soo Lee
- a Catholic Institute for Visual Science , Seoul St. Mary's Hospital , Seoul , Republic of Korea.,b Department of Ophthalmology , Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea , Seoul , Republic of Korea
| | - Choun-Ki Joo
- a Catholic Institute for Visual Science , Seoul St. Mary's Hospital , Seoul , Republic of Korea.,b Department of Ophthalmology , Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea , Seoul , Republic of Korea
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Chen B, Li MY, Guo Y, Zhao X, Lim HMC. Mast cell-derived exosomes at the stimulated acupoints activating the neuro-immune regulation. Chin J Integr Med 2016; 23:878-880. [PMID: 27650095 DOI: 10.1007/s11655-016-2269-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Indexed: 01/25/2023]
Abstract
Exosomes are cell-derived vesicles that take part in intercellular signaling. Research has shown that acupuncture is closely related to affecting the functions of the mast cells in the local region of the acupoint, and stimulating the afferent nerve. Mast cells have a connection with the conduction within the meridians, and play an important role in immuno-regulation. The 'synapse-like' connection between the mast cells and nerve endings is the basis for the exchange of information between these two tissues. Exosome mediates mast exchange of information between mast cells and the nerves, starting the process of neuro-immuno regulation. Therefore, we propose that mast cell-derived exosomes mediate the neuro-immuno regulation at the local site of acupuncture, and this is one of the key factors resulting in the effectiveness of acupuncture.
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Affiliation(s)
- Bo Chen
- Acu-moxibustion and Tuina Department of Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Ming-Yue Li
- Department of Clinical Practice Teaching, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China.
| | - Yi Guo
- Acu-moxibustion and Tuina Department of Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Xue Zhao
- Acu-moxibustion and Tuina Department of Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Hui-Min Calista Lim
- Acu-moxibustion and Tuina Department of Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
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Subramanian H, Gupta K, Ali H. Roles of Mas-related G protein-coupled receptor X2 on mast cell-mediated host defense, pseudoallergic drug reactions, and chronic inflammatory diseases. J Allergy Clin Immunol 2016; 138:700-710. [PMID: 27448446 DOI: 10.1016/j.jaci.2016.04.051] [Citation(s) in RCA: 277] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 03/21/2016] [Accepted: 04/06/2016] [Indexed: 12/11/2022]
Abstract
Mast cells (MCs), which are granulated tissue-resident cells of hematopoietic lineage, contribute to vascular homeostasis, innate/adaptive immunity, and wound healing. However, MCs are best known for their roles in allergic and inflammatory diseases, such as anaphylaxis, food allergy, rhinitis, itch, urticaria, atopic dermatitis, and asthma. In addition to the high-affinity IgE receptor (FcεRI), MCs express numerous G protein-coupled receptors (GPCRs), which are the largest group of membrane receptor proteins and the most common targets of drug therapy. Antimicrobial host defense peptides, neuropeptides, major basic protein, eosinophil peroxidase, and many US Food and Drug Administration-approved peptidergic drugs activate human MCs through a novel GPCR known as Mas-related G protein-coupled receptor X2 (MRGPRX2; formerly known as MrgX2). Unique features of MRGPRX2 that distinguish it from other GPCRs include their presence both on the plasma membrane and intracellular sites and their selective expression in MCs. In this article we review the possible roles of MRGPRX2 on host defense, drug-induced anaphylactoid reactions, neurogenic inflammation, pain, itch, and chronic inflammatory diseases, such as urticaria and asthma. We propose that host defense peptides that kill microbes directly and activate MCs through MRGPRX2 could serve as novel GPCR targets to modulate host defense against microbial infection. Furthermore, mAbs or small-molecule inhibitors of MRGPRX2 could be developed for the treatment of MC-dependent allergic and inflammatory disorders.
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Affiliation(s)
- Hariharan Subramanian
- Department of Pathology, University of Pennsylvania School of Dental Medicine, Philadelphia, Pa
| | - Kshitij Gupta
- Department of Pathology, University of Pennsylvania School of Dental Medicine, Philadelphia, Pa
| | - Hydar Ali
- Department of Pathology, University of Pennsylvania School of Dental Medicine, Philadelphia, Pa.
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