1
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Deng W, Cao Z, Dong R, Yan Y, Jiang Q. Irisin inhibits CCK-8-induced TNF-α production via integrin αVβ5-NF-κB signaling pathways in Nile tilapia (Oreochromis niloticus). FISH & SHELLFISH IMMUNOLOGY 2024; 144:109245. [PMID: 38000652 DOI: 10.1016/j.fsi.2023.109245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/02/2023] [Accepted: 11/20/2023] [Indexed: 11/26/2023]
Abstract
Irisin, a secreted myokine generated by fibronectin type III domain-containing protein 5, has recently shown the potential to alleviate inflammation. Cholecystokinin-octapeptide (CCK-8) is closely associated with the inflammatory factor TNF-α, a central cytokine in inflammatory reactions. However, the interactions between irisin and CCK-8 in regulating TNF-α production and the underlying mechanism have not yet been elucidated. In the present study, irisin treatment inhibited the basal and the CCK-8-induced TNF-α production in vivo. Additionally, neutralizing circulating irisin using an irisin antiserum significantly augmented the CCK-8-induced stimulation of TNF-α levels. Moreover, the incubation of head kidney cells with irisin or CCK-8 has opposite effects on TNF-α secretion. Notably, irisin treatment inhibited basal and CCK-8-stimulated TNF-α release and gene transcription in head kidney cells. Mechanistically, the inhibitory actions of irisin on basal and CCK-8-induced TNF-α production could be negated by co-administered with the selective integrin αVβ5 inhibitor cilengitide. In addition, the inhibitory effect of irisin on basal and CCK-8-triggered TNF-α production could be abolished by the inhibition of the nuclear factor-kappa B (NF-κB) signaling pathway. Furthermore, irisin impeded CCK-8-induced phosphorylation and degradation of IκBα, simultaneously inhibiting NF-κB phosphorylation, preventing its translocation into the nucleus, and suppressing its DNA-binding activity induced by CCK-8. Collectively, these results suggest that the inhibitory effect of irisin on TNF-α production caused by CCK-8 is mediated via the integrin αVβ5-NF-κB signaling pathways in tilapia.
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Affiliation(s)
- Wenjun Deng
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, PR China
| | - Zhikai Cao
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, PR China
| | - Rui Dong
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, PR China
| | - Yisha Yan
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, PR China
| | - Quan Jiang
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, PR China.
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2
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Dicks LMT. Our Mental Health Is Determined by an Intrinsic Interplay between the Central Nervous System, Enteric Nerves, and Gut Microbiota. Int J Mol Sci 2023; 25:38. [PMID: 38203207 PMCID: PMC10778721 DOI: 10.3390/ijms25010038] [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: 11/22/2023] [Revised: 12/13/2023] [Accepted: 12/16/2023] [Indexed: 01/12/2024] Open
Abstract
Bacteria in the gut microbiome play an intrinsic part in immune activation, intestinal permeability, enteric reflex, and entero-endocrine signaling. The gut microbiota communicates with the central nervous system (CNS) through the production of bile acids, short-chain fatty acids (SCFAs), glutamate (Glu), γ-aminobutyric acid (GABA), dopamine (DA), norepinephrine (NE), serotonin (5-HT), and histamine. A vast number of signals generated in the gastrointestinal tract (GIT) reach the brain via afferent fibers of the vagus nerve (VN). Signals from the CNS are returned to entero-epithelial cells (EES) via efferent VN fibers and communicate with 100 to 500 million neurons in the submucosa and myenteric plexus of the gut wall, which is referred to as the enteric nervous system (ENS). Intercommunications between the gut and CNS regulate mood, cognitive behavior, and neuropsychiatric disorders such as autism, depression, and schizophrenia. The modulation, development, and renewal of nerves in the ENS and changes in the gut microbiome alter the synthesis and degradation of neurotransmitters, ultimately influencing our mental health. The more we decipher the gut microbiome and understand its effect on neurotransmission, the closer we may get to developing novel therapeutic and psychobiotic compounds to improve cognitive functions and prevent mental disorders. In this review, the intricate control of entero-endocrine signaling and immune responses that keep the gut microbiome in a balanced state, and the influence that changing gut bacteria have on neuropsychiatric disorders, are discussed.
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Affiliation(s)
- Leon M T Dicks
- Department of Microbiology, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch 7602, South Africa
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3
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Zhang D, Jia M, Wang C, Li Y, Ma C, Zhu G, Ma R, Wen D, Jia X, Xu G, Zhang X, Cong B. CCK2-receptor deficiency impairs immune balance by influencing CD4 + T cells development by inhibiting cortical-thymic-epithelial-cells. Exp Biol Med (Maywood) 2023; 248:1718-1731. [PMID: 37787155 PMCID: PMC10792431 DOI: 10.1177/15353702231198083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Accepted: 07/05/2023] [Indexed: 10/04/2023] Open
Abstract
Immune balance is crucial for an organism's survival and is inseparable from the regulation of the nervous system. Accumulating evidence indicates that cholecystokinin (CCK) plays an important role in mediating the immune response through the activation of cholecystokinin receptors (CCKRs). However, it remains unclear whether CCKRs deficiency may impair immune balance. Here, we showed that CCK2R-deficient adult mice were immunocompromised and had an increased risk of shock and even death in an endotoxemia (ETM)/endotoxin shock (ES) model. In addition, in both adult and juvenile mice, CCK2R deficiency not only influenced the development of CD4 single-positive (SP) thymocytes in thymic positive selection but also decreased the population of CD3+ CD4+ T cells in the spleen. More importantly, CCK2R deficiency inhibited the expression of major histocompatibility complex class II (MHC II) and CD83 on cortical thymic epithelial cells (cTECs) in juvenile and adult mice. Overall, our study suggests that CCK2R is essential for maintaining CD4+ T cell development in the thymus and reveals that CCK2R plays an important role in maintaining immune balance.
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Affiliation(s)
- Dong Zhang
- College of Forensic Medicine, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Hebei Medical University, Shijiazhuang 050017, China
- Institute of Basic Medicine, Hebei Medical University, Shijiazhuang 050017, China
- Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang 050017, China
- College of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang 050017, China
| | - Miaomiao Jia
- Institute of Basic Medicine, Hebei Medical University, Shijiazhuang 050017, China
- Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang 050017, China
| | - Chuan Wang
- College of Forensic Medicine, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Hebei Medical University, Shijiazhuang 050017, China
| | - Yingmin Li
- College of Forensic Medicine, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Hebei Medical University, Shijiazhuang 050017, China
- Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang 050017, China
| | - Chunling Ma
- College of Forensic Medicine, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Hebei Medical University, Shijiazhuang 050017, China
- Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang 050017, China
| | - Guiyun Zhu
- College of Forensic Medicine, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Hebei Medical University, Shijiazhuang 050017, China
- Institute of Basic Medicine, Hebei Medical University, Shijiazhuang 050017, China
- Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang 050017, China
| | - Rufei Ma
- College of Forensic Medicine, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Hebei Medical University, Shijiazhuang 050017, China
- Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang 050017, China
| | - Di Wen
- College of Forensic Medicine, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Hebei Medical University, Shijiazhuang 050017, China
- Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang 050017, China
| | - Xianxian Jia
- Institute of Basic Medicine, Hebei Medical University, Shijiazhuang 050017, China
- Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang 050017, China
| | - Guangming Xu
- College of Forensic Medicine, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Hebei Medical University, Shijiazhuang 050017, China
| | - Xiaojing Zhang
- College of Forensic Medicine, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Hebei Medical University, Shijiazhuang 050017, China
- Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang 050017, China
| | - Bin Cong
- College of Forensic Medicine, Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Hebei Medical University, Shijiazhuang 050017, China
- Institute of Basic Medicine, Hebei Medical University, Shijiazhuang 050017, China
- Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang 050017, China
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4
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Hohman LS, Osborne LC. A gut-centric view of aging: Do intestinal epithelial cells contribute to age-associated microbiota changes, inflammaging, and immunosenescence? Aging Cell 2022; 21:e13700. [PMID: 36000805 PMCID: PMC9470900 DOI: 10.1111/acel.13700] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 07/07/2022] [Accepted: 08/03/2022] [Indexed: 01/25/2023] Open
Abstract
Intestinal epithelial cells (IECs) serve as both a physical and an antimicrobial barrier against the microbiota, as well as a conduit for signaling between the microbiota and systemic host immunity. As individuals age, the balance between these systems undergoes a myriad of changes due to age-associated changes to the microbiota, IECs themselves, immunosenescence, and inflammaging. In this review, we discuss emerging data related to age-associated loss of intestinal barrier integrity and posit that IEC dysfunction may play a central role in propagating age-associated alterations in microbiota composition and immune homeostasis.
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Affiliation(s)
- Leah S. Hohman
- Department of Microbiology & Immunology, Life Sciences InstituteUniversity of British ColumbiaVancouverBritish ColumbiaCanada
| | - Lisa C. Osborne
- Department of Microbiology & Immunology, Life Sciences InstituteUniversity of British ColumbiaVancouverBritish ColumbiaCanada
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5
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Walrath T, Dyamenahalli KU, Hulsebus HJ, McCullough RL, Idrovo JP, Boe DM, McMahan RH, Kovacs EJ. Age-related changes in intestinal immunity and the microbiome. J Leukoc Biol 2020; 109:1045-1061. [PMID: 33020981 DOI: 10.1002/jlb.3ri0620-405rr] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 09/11/2020] [Accepted: 09/13/2020] [Indexed: 12/19/2022] Open
Abstract
The gastrointestinal (GI) tract is a vitally important site for the adsorption of nutrients as well as the education of immune cells. Homeostasis of the gut is maintained by the interplay of the intestinal epithelium, immune cells, luminal Ags, and the intestinal microbiota. The well-being of the gut is intrinsically linked to the overall health of the host, and perturbations to this homeostasis can have severe impacts on local and systemic health. One factor that causes disruptions in gut homeostasis is age, and recent research has elucidated how critical systems within the gut are altered during the aging process. Intestinal stem cell proliferation, epithelial barrier function, the gut microbiota, and the composition of innate and adaptive immune responses are all altered in advanced age. The aging population continues to expand worldwide, a phenomenon referred to as the "Silver Tsunami," and every effort must be made to understand how best to prevent and treat age-related maladies. Here, recent research about changes observed in the intestinal epithelium, the intestinal immune system, the microbiota, and how the aging gut interacts with and influences other organs such as the liver, lung, and brain are reviewed. Better understanding of these age-related changes and their impact on multi-organ interactions will aid the development of therapies to increase the quality of life for all aged individuals.
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Affiliation(s)
- Travis Walrath
- Department of Surgery, Division of GI, Trauma and Endocrine Surgery, and Burn Research Program, University of Colorado Denver, Aurora, Colorado, USA
| | - Kiran U Dyamenahalli
- Department of Surgery, Division of GI, Trauma and Endocrine Surgery, and Burn Research Program, University of Colorado Denver, Aurora, Colorado, USA
| | - Holly J Hulsebus
- Department of Surgery, Division of GI, Trauma and Endocrine Surgery, and Burn Research Program, University of Colorado Denver, Aurora, Colorado, USA.,Immunology Graduate Program, University of Colorado Denver, Aurora, Colorado, USA
| | - Rebecca L McCullough
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver, Aurora, Colorado, USA.,GI and Liver Innate Immune Program, University of Colorado Denver, Aurora, Colorado, USA
| | - Juan-Pablo Idrovo
- Department of Surgery, Division of GI, Trauma and Endocrine Surgery, and Burn Research Program, University of Colorado Denver, Aurora, Colorado, USA
| | - Devin M Boe
- Department of Surgery, Division of GI, Trauma and Endocrine Surgery, and Burn Research Program, University of Colorado Denver, Aurora, Colorado, USA.,Immunology Graduate Program, University of Colorado Denver, Aurora, Colorado, USA.,Medical Scientist Training Program, University of Colorado Denver, Aurora, Colorado, USA
| | - Rachel H McMahan
- Department of Surgery, Division of GI, Trauma and Endocrine Surgery, and Burn Research Program, University of Colorado Denver, Aurora, Colorado, USA
| | - Elizabeth J Kovacs
- Department of Surgery, Division of GI, Trauma and Endocrine Surgery, and Burn Research Program, University of Colorado Denver, Aurora, Colorado, USA.,Immunology Graduate Program, University of Colorado Denver, Aurora, Colorado, USA.,Medical Scientist Training Program, University of Colorado Denver, Aurora, Colorado, USA.,GI and Liver Innate Immune Program, University of Colorado Denver, Aurora, Colorado, USA
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6
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Wang C, Zhang C, Wu D, Guo L, Zhao F, Lv J, Fu L. Cholecystokinin octapeptide reduces myocardial fibrosis and improves cardiac remodeling in post myocardial infarction rats. Int J Biochem Cell Biol 2020; 125:105793. [PMID: 32554056 DOI: 10.1016/j.biocel.2020.105793] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 06/03/2020] [Accepted: 06/13/2020] [Indexed: 12/09/2022]
Abstract
BACKGROUND/AIMS Myocardial infarction (MI) increases myocardial fibrosis (MF) and subsequent cardiac remodeling. Cholecystokinin octapeptide (CCK-8) is expressed in cardiomyocytes and plays an important role in cardiovascular regulation. In this study, we intend to use a rat model of myocardial infarction to evaluate the effects of CCK-8 on myocardial fibrosis and cardiac remodeling. METHODS Male Sprague-Dawley rats were separated into 3 groups: sham operation, MI + NaCl, and MI + CCK-8. All rats were subjected to left coronary artery ligation to induce MI or sham operation and then treated with CCK-8 or saline for 28 days. After 4 weeks, echocardiography was performed to assess cardiac function and myocardial fibrosis was evaluated using H&E and Masson's Trichrome-stained sections. The levels of BNP, CCK-8 in the plasma of all rats were detected by ELISA; RNA sequencing (RNA-seq) analysis was also adapted to detect differentially expressed genes in myocardial tissues of each group. Myocardial expression of fibrosis markers was analyzed by western blotting, immunohistochemistry and qRT-PCR. RESULTS CCK-8 was demonstrated to improve left ventricular function and results of H&E staining, Masson's trichrome staining, immunohistochemistry and western blotting showed that CCK-8 attenuated MF. Gene expression profiles of the left ventricles were analysed by RNA-seq and validated by qRT-PCR. Cardiac fibrosis genes were downregulated by CCK-8 in the left ventricle. SIGNIFICANCE CCK-8 can alleviate fibrosis in the noninfarcted regions and delay the left ventricular remodeling and the progress of heart failure in a MI rat model.
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Affiliation(s)
- Can Wang
- Laboratory of Cardiovascular Internal Medicine Department, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Cuili Zhang
- Laboratory of Cardiovascular Internal Medicine Department, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Dongdong Wu
- Laboratory of Cardiovascular Internal Medicine Department, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Lu Guo
- Laboratory of Cardiovascular Internal Medicine Department, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Fali Zhao
- Laboratory of Cardiovascular Internal Medicine Department, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jinxin Lv
- Laboratory of Cardiovascular Internal Medicine Department, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Lu Fu
- Laboratory of Cardiovascular Internal Medicine Department, The First Affiliated Hospital of Harbin Medical University, Harbin, China.
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7
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Taher S, Borja Y, Cabanela L, Costers VJ, Carson-Marino M, Bailes JC, Dhar B, Beckworth MT, Rabaglino MB, Post Uiterweer ED, Conrad KP. Cholecystokinin, gastrin, cholecystokinin/gastrin receptors, and bitter taste receptor TAS2R14: trophoblast expression and signaling. Am J Physiol Regul Integr Comp Physiol 2019; 316:R628-R639. [PMID: 30892908 PMCID: PMC6589605 DOI: 10.1152/ajpregu.00153.2018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 02/19/2019] [Accepted: 02/20/2019] [Indexed: 02/07/2023]
Abstract
We investigated expression of cholecystokinin (CCK) in humans and mice, and the bitter taste receptor TAS2R14 in the human placenta. Because CCK and gastrin activate the CCKBR receptor, we also explored placental gastrin expression. Finally, we investigated calcium signaling by CCK and TAS2R14. By RT-PCR, we found CCK/Cck and GAST/Gast mRNA expression in both normal human and mouse placentas, as well as in human trophoblast cell lines (TCL). Although both Cckar and -br mRNA were expressed in the mouse placenta, only CCKBR mRNA was detected in the human placenta and TCL. mRNA expression for TAS2R14 was also observed in the human placenta and TCL. Using immunohistochemistry, CCK protein was localized to the syncytiotrophoblast (ST) and extravillous trophoblast (EVT) in the human term placenta, and to trophoblast glycogen cells in mouse and human placentas. Gastrin and TAS2R14 proteins were also observed in ST and EVT of the human placenta. Both sulfated and nonsulfated CCK elicited a comparable rise in intracellular calcium in TCL, consistent with CCKBR expression. Three TAS2R14 agonists, flufenamic acid, chlorhexidine, and diphenhydramine, also evoked rises in intracellular calcium in TCL. These results establish CCK, gastrin, and their receptor(s) in both human and mouse placentas, and TAS2R14 in the human placenta. Both CCK and TAS2R14 agonists increased intracellular calcium in human TCL. Although the roles of these ligands and receptors, and their potential cross talk in normal and pathological placentas, are currently unknown, this study opens new avenues for placental research.
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MESH Headings
- Animals
- Calcium Signaling
- Cell Line
- Cholecystokinin/genetics
- Cholecystokinin/metabolism
- Cholecystokinin/pharmacology
- Female
- Gastrins/genetics
- Gastrins/metabolism
- Gene Expression Regulation, Developmental
- Humans
- Ligands
- Mice
- Mice, Inbred C57BL
- Pregnancy
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptor, Cholecystokinin B/genetics
- Receptor, Cholecystokinin B/metabolism
- Receptors, Cholecystokinin/agonists
- Receptors, Cholecystokinin/genetics
- Receptors, Cholecystokinin/metabolism
- Receptors, G-Protein-Coupled/agonists
- Receptors, G-Protein-Coupled/genetics
- Receptors, G-Protein-Coupled/metabolism
- Signal Transduction/drug effects
- Trophoblasts/drug effects
- Trophoblasts/metabolism
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Affiliation(s)
- Shèdy Taher
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, and D. H. Barron Reproductive and Perinatal Biology Research Program, Gainesville, Florida
| | - Yamilette Borja
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, and D. H. Barron Reproductive and Perinatal Biology Research Program, Gainesville, Florida
| | - Lucía Cabanela
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, and D. H. Barron Reproductive and Perinatal Biology Research Program, Gainesville, Florida
| | - Vincent J Costers
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, and D. H. Barron Reproductive and Perinatal Biology Research Program, Gainesville, Florida
| | - Morgan Carson-Marino
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, and D. H. Barron Reproductive and Perinatal Biology Research Program, Gainesville, Florida
| | - Julie C Bailes
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, and D. H. Barron Reproductive and Perinatal Biology Research Program, Gainesville, Florida
| | - Biswadeep Dhar
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, and D. H. Barron Reproductive and Perinatal Biology Research Program, Gainesville, Florida
| | - Mark T Beckworth
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, and D. H. Barron Reproductive and Perinatal Biology Research Program, Gainesville, Florida
| | - Maria B Rabaglino
- Instituto de Investigaciones en Ciencias de la Salud, Consejo Nacional de Investigaciones Científicas y Técnicas, Pabellón de Biología Celular, Córdoba , Argentina
| | - Emiel D Post Uiterweer
- Department of Obstetrics and Laboratory of Neuroimmunology and Developmental Origins of Disease, University Medical Center Utrecht , Utrecht , The Netherlands
| | - Kirk P Conrad
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, and D. H. Barron Reproductive and Perinatal Biology Research Program, Gainesville, Florida
- Department of Obstetrics and Gynecology, University of Florida College of Medicine , Gainesville, Florida
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8
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Funakoshi A, Tatsuno K, Shimauchi T, Fujiyama T, Ito T, Tokura Y. Cholecystokinin Downregulates Psoriatic Inflammation by Its Possible Self-Regulatory Effect on Epidermal Keratinocytes. THE JOURNAL OF IMMUNOLOGY 2019; 202:2609-2615. [PMID: 30902899 DOI: 10.4049/jimmunol.1801426] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 02/27/2019] [Indexed: 12/21/2022]
Abstract
Cholecystokinin (CCK) is a peptide hormone that functions in digestive organs and the CNS. We previously showed that CCK downregulates peripheral pruritus by suppressing degranulation of mast cells. In this study, we demonstrated that CCK octapeptide (CCK8) was constitutively expressed in the epidermis of normal skin, whereas its expression was lost in acanthotic lesions of psoriasis. In contrast, CCKA receptor (CCKAR), a high-affinity receptor for CCK, was constitutively expressed in the epidermis of psoriatic skin lesions. Expression of CCK was also reduced in skin lesions of an imiquimod (IMQ)-induced psoriatic mouse model. Notably, the expression level of CCK inversely correlated with the severity of epidermal inflammation, raising the possibility that CCK from epidermal keratinocytes suppresses the psoriatic inflammation. To verify this hypothesis, we investigated the effects of sulfated CCK octapeptide (CCK8S) on the development of IMQ-induced psoriatic inflammation. i.p. injection of CCK8S suppressed the IMQ-induced psoriatic inflammation accompanied by reduced mRNA expression of IL-17, IL-22, and IL-6 but not of IL-23. The suppressive effect of CCK8S was completely restored by administration of CCKAR antagonist. In vitro studies showed that exogenous CCK8S suppressed IL-6 production in CCKAR-expressing cultured human keratinocytes, and blocking the endogenous CCK signaling with CCKAR antagonist markedly enhanced IL-6 production. When keratinocytes were stimulated with IL-17, the expression of endogenous CCK was significantly decreased. These findings suggest that CCK physiologically functions as a negative regulator of keratinocyte-based inflammation in an autocrine or paracrine manner, although decreased CCK may pathologically contribute to continuous and aggravated skin lesions such as psoriasis.
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Affiliation(s)
- Atsuko Funakoshi
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Kazuki Tatsuno
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Takatoshi Shimauchi
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Toshiharu Fujiyama
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Taisuke Ito
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Yoshiki Tokura
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
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9
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Herrera-Aco DR, Medina-Campos ON, Pedraza-Chaverri J, Sciutto-Conde E, Rosas-Salgado G, Fragoso-González G. Alpha-mangostin: Anti-inflammatory and antioxidant effects on established collagen-induced arthritis in DBA/1J mice. Food Chem Toxicol 2018; 124:300-315. [PMID: 30557668 DOI: 10.1016/j.fct.2018.12.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 11/23/2018] [Accepted: 12/13/2018] [Indexed: 12/15/2022]
Abstract
Rheumatoid arthritis (RA) is an autoimmune disease that causes physical disability in people worldwide. Despite progress made in RA treatment in the past decade, new drugs with high efficacy but few long-term adverse effects are still needed. This study focused on evaluating the therapeutic potential of α-mangostin on established collagen-induced arthritis (CIA) in DBA/1J mice. Arthritic DBA/1J mice were orally administered with two doses of α-mangostin (10 and 40 mg/kg) daily, for 33 days. Alpha-mangostin significantly decreased the clinical score in the short term at both doses and decreased the histopathological score at the higher dose. This improvement was accompanied by a reduction on serum levels of anti-collagen IgG2a autoantibodies and of the production of LIX/CXCL5, IP-10/CXCL10, MIG/CXCL9, RANTES/CCL5, IL-6 and IL-33 in the joints of CIA mice. Alpha-mangostin also exhibited an anti-oxidant effect decreasing the NADPH oxidase activity and lipid peroxidation and preserving the levels of reduced glutathione in the arthritic joints. In vitro this xanthone demonstrated modulatory properties on LPS-activated dendritic cells, although in Th1 and Th17-polarized lymphocytes promotes a pro-apoptotic phenotype. Altogether this study illustrates the capacity of α-mangostin to ameliorate the early clinical and histological signs of established CIA by reducing the inflammatory and oxidative responses.
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Affiliation(s)
- Diana Rocio Herrera-Aco
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad Universitaria s/n, Ciudad de México, 04650, Mexico
| | - Omar Noel Medina-Campos
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria s/n, Ciudad de México, 04650, Mexico
| | - José Pedraza-Chaverri
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria s/n, Ciudad de México, 04650, Mexico
| | - Edda Sciutto-Conde
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad Universitaria s/n, Ciudad de México, 04650, Mexico
| | - Gabriela Rosas-Salgado
- Facultad de Medicina, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, 62350, Mexico
| | - Gladis Fragoso-González
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad Universitaria s/n, Ciudad de México, 04650, Mexico.
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Worthington JJ, Reimann F, Gribble FM. Enteroendocrine cells-sensory sentinels of the intestinal environment and orchestrators of mucosal immunity. Mucosal Immunol 2018; 11:3-20. [PMID: 28853441 DOI: 10.1038/mi.2017.73] [Citation(s) in RCA: 141] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 07/14/2017] [Indexed: 02/06/2023]
Abstract
The intestinal epithelium must balance efficient absorption of nutrients with partitioning commensals and pathogens from the bodies' largest immune system. If this crucial barrier fails, inappropriate immune responses can result in inflammatory bowel disease or chronic infection. Enteroendocrine cells represent 1% of this epithelium and have classically been studied for their detection of nutrients and release of peptide hormones to mediate digestion. Intriguingly, enteroendocrine cells are the key sensors of microbial metabolites, can release cytokines in response to pathogen associated molecules and peptide hormone receptors are expressed on numerous intestinal immune cells; thus enteroendocrine cells are uniquely equipped to be crucial and novel orchestrators of intestinal inflammation. In this review, we introduce enteroendocrine chemosensory roles, summarize studies correlating enteroendocrine perturbations with intestinal inflammation and describe the mechanistic interactions by which enteroendocrine and mucosal immune cells interact during disease; highlighting this immunoendocrine axis as a key aspect of innate immunity.
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Affiliation(s)
- J J Worthington
- Lancaster University, Faculty of Health and Medicine, Division of Biomedical and Life Sciences, Lancaster, Lancashire, UK
| | - F Reimann
- University of Cambridge, Metabolic Research Laboratories, Wellcome Trust/MRC Institute of Metabolic Science & MRC Metabolic Diseases Unit, Addenbrooke's Hospital, Cambridge, UK
| | - F M Gribble
- University of Cambridge, Metabolic Research Laboratories, Wellcome Trust/MRC Institute of Metabolic Science & MRC Metabolic Diseases Unit, Addenbrooke's Hospital, Cambridge, UK
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11
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Li H, Chen HY, Liu WX, Jia XX, Zhang JG, Ma CL, Zhang XJ, Yu F, Cong B. Prostaglandin E 2 restrains human Treg cell differentiation via E prostanoid receptor 2-protein kinase A signaling. Immunol Lett 2017; 191:63-72. [PMID: 28963072 DOI: 10.1016/j.imlet.2017.09.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 09/01/2017] [Accepted: 09/25/2017] [Indexed: 10/18/2022]
Abstract
Regulatory T cells (Treg cells) belong to a class of immunosuppressive cells that control the pathological changes of autoimmunity and inflammation. Prostaglandin E2 (PGE2) is a potent lipid mediator of immune inflammation including rheumatoid arthritis (RA) that exerts its effects via four subtypes of G-protein-coupled receptors (EP1-4). The ability of PGE2 to regulate human Treg differentiation has not yet been reported. In the current study, we investigated the effects of PGE2 on the differentiation of naïve T cells from healthy and RA patients into Treg cells and the intracellular signaling involved in this process in vitro. Our data indicate that PGE2 negatively influenced the percentage of Treg cells and Foxp3 mRNA expression. The regulatory effects of PGE2 were associated with increased intracellular cAMP levels and PKA activity. EP2 receptors may mediate the inhibitory role of PGE2, since PGE2 actions were mimicked by EP2 agonist (Butaprost) and cAMP agonist (Sp-8-CPT-cAMPS) but were reversed by an EP2 antagonist (PF-04418948) and a PKA inhibitor (H-89). PGE2 negatively modulated the expression of cytotoxic T lymphocyte antigen-4 (CTLA-4) and glucocorticoid-induced tumor necrosis factor receptor-related protein (GITR), as well as the production of interleukin (IL)-10 by Treg cells via EP2 receptors and cAMP/PKA signaling. All these findings indicate that PGE2 can inhibit Treg differentiation mediated through the EP2-cAMP/PKA signaling pathway, and suggest novel immune-based therapies for use in RA treatment.
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Affiliation(s)
- Hui Li
- Institute of Basic Medicine, Hebei Medical University, Shijiazhuang, 050017, PR China.
| | - Hai-Ying Chen
- Department of Rheumatology and Immunology, The Third Affiliated Hospital of Hebei Medical University, Shijiazhuang, 050000, PR China.
| | - Wen-Xuan Liu
- Department of Forensic Medicine, Key Laboratory of Forensic Medicine, Hebei Medical University, Shijiazhuang, 050017, PR China.
| | - Xian-Xian Jia
- Institute of Basic Medicine, Hebei Medical University, Shijiazhuang, 050017, PR China.
| | - Jing-Ge Zhang
- Department of Forensic Medicine, Key Laboratory of Forensic Medicine, Hebei Medical University, Shijiazhuang, 050017, PR China.
| | - Chun-Ling Ma
- Department of Forensic Medicine, Key Laboratory of Forensic Medicine, Hebei Medical University, Shijiazhuang, 050017, PR China.
| | - Xiao-Jing Zhang
- Department of Forensic Medicine, Key Laboratory of Forensic Medicine, Hebei Medical University, Shijiazhuang, 050017, PR China.
| | - Feng Yu
- Department of Forensic Medicine, Key Laboratory of Forensic Medicine, Hebei Medical University, Shijiazhuang, 050017, PR China.
| | - Bin Cong
- Institute of Basic Medicine, Hebei Medical University, Shijiazhuang, 050017, PR China.
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12
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Okumura R, Takeda K. Roles of intestinal epithelial cells in the maintenance of gut homeostasis. Exp Mol Med 2017; 49:e338. [PMID: 28546564 PMCID: PMC5454438 DOI: 10.1038/emm.2017.20] [Citation(s) in RCA: 395] [Impact Index Per Article: 56.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 01/02/2017] [Indexed: 12/15/2022] Open
Abstract
The intestine is a unique organ inhabited by a tremendous number of microorganisms. Intestinal epithelial cells greatly contribute to the maintenance of the symbiotic relationship between gut microbiota and the host by constructing mucosal barriers, secreting various immunological mediators and delivering bacterial antigens. Mucosal barriers, including physical barriers and chemical barriers, spatially segregate gut microbiota and the host immune system to avoid unnecessary immune responses to gut microbes, leading to the intestinal inflammation. In addition, various immunological mediators, including cytokines and chemokines, secreted from intestinal epithelial cells stimulated by gut microbiota modulate host immune responses, maintaining a well-balanced relationship between gut microbes and the host immune system. Therefore, impairment of the innate immune functions of intestinal epithelial cells is associated with intestinal inflammation.
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Affiliation(s)
- Ryu Okumura
- Laboratory of Immune Regulation, Department of Microbiology and Immunology, Graduate School of Medicine, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Kiyoshi Takeda
- Laboratory of Immune Regulation, Department of Microbiology and Immunology, Graduate School of Medicine, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan
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13
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Wen D, An M, Gou H, Liu X, Liu L, Ma C, Cong B. Cholecystokinin-8 inhibits methamphetamine-induced neurotoxicity via an anti-oxidative stress pathway. Neurotoxicology 2016; 57:31-38. [DOI: 10.1016/j.neuro.2016.08.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 06/07/2016] [Accepted: 08/15/2016] [Indexed: 11/28/2022]
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Nakajima S, Hira T, Iwaya H, Hara H. Zinc directly stimulates cholecystokinin secretion from enteroendocrine cells and reduces gastric emptying in rats. Mol Cell Endocrinol 2016; 430:108-14. [PMID: 27107934 DOI: 10.1016/j.mce.2016.04.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 04/06/2016] [Accepted: 04/19/2016] [Indexed: 12/27/2022]
Abstract
Zinc, an essential mineral element, regulates various physiological functions such as immune responses and hormone secretion. Cholecystokinin (CCK), a gut hormone, has a role in protective immunity through the regulation of gastrointestinal motility, appetite, and inflammatory response. Here, we examined the effect of zinc on CCK secretion in STC-1 cells, an enteroendocrine cell line derived from murine duodenum, and in rats. Extracellular zinc triggered CCK secretion accompanied with increased intracellular Ca(2+) and Zn(2+) mobilization in STC-1 cells. Zinc-induced CCK secretion was abolished in the absence of intracellular Zn(2+) or extracellular calcium. Upon inhibition of transient receptor potential ankyrin 1 (TRPA1), extracellular zinc failed to increase intracellular Ca(2+) and subsequent CCK secretion. In rats, oral zinc administration decreased gastric emptying through the activation of CCK signaling. These results suggest that zinc is a novel stimulant for CCK secretion through the activation of TRPA1 related to intracellular Zn(2+) and Ca(2+) mobilization.
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Affiliation(s)
- Shingo Nakajima
- Research Faculty of Health Science, Hokkaido University, Japan; Research Faculty of Agriculture, Hokkaido University, Japan
| | - Tohru Hira
- Research Faculty of Agriculture, Hokkaido University, Japan.
| | - Hitoshi Iwaya
- Research Faculty of Agriculture, Hokkaido University, Japan; La Jolla Institute for Allergy & Immunology, USA
| | - Hiroshi Hara
- Research Faculty of Agriculture, Hokkaido University, Japan
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15
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The intestinal immunoendocrine axis: novel cross-talk between enteroendocrine cells and the immune system during infection and inflammatory disease. Biochem Soc Trans 2015; 43:727-33. [PMID: 26551720 PMCID: PMC4613519 DOI: 10.1042/bst20150090] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Indexed: 12/17/2022]
Abstract
The intestinal epithelium plays a crucial role in maintaining barrier function and immune homeostasis, a failure of which results in disease. This review focuses on the epithelial enteroendocrine cells and the crosstalk that exists with immune cells during inflammation. The intestinal epithelium represents one of our most important interfaces with the external environment. It must remain tightly balanced to allow nutrient absorption, but maintain barrier function and immune homoeostasis, a failure of which results in chronic infection or debilitating inflammatory bowel disease (IBD). The intestinal epithelium mainly consists of absorptive enterocytes and secretory goblet and Paneth cells and has recently come to light as being an essential modulator of immunity as opposed to a simple passive barrier. Each epithelial sub-type can produce specific immune modulating factors, driving innate immunity to pathogens as well as preventing autoimmunity. The enteroendocrine cells comprise just 1% of this epithelium, but collectively form the bodies’ largest endocrine system. The mechanisms of enteroendocrine cell peptide secretion during feeding, metabolism and nutrient absorption are well studied; but their potential interactions with the enriched numbers of surrounding immune cells remain largely unexplored. This review focuses on alterations in enteroendocrine cell number and peptide secretion during inflammation and disease, highlighting the few in depth studies which have attempted to dissect the immune driven mechanisms that drive these phenomena. Moreover, the emerging potential of enteroendocrine cells acting as innate sensors of intestinal perturbation and secreting peptides to directly orchestrate immune cell function will be proposed. In summary, the data generated from these studies have begun to unravel a complex cross-talk between immune and enteroendocrine cells, highlighting the emerging immunoendocrine axis as a potential target for therapeutic strategies for infections and inflammatory disorders of the intestine.
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16
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Cholecystokinin octapeptide regulates the differentiation and effector cytokine production of CD4(+) T cells in vitro. Int Immunopharmacol 2014; 20:307-15. [PMID: 24704498 DOI: 10.1016/j.intimp.2014.03.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 03/19/2014] [Accepted: 03/19/2014] [Indexed: 12/14/2022]
Abstract
Cholecystokinin octapeptide (CCK-8), an immunomodulatory peptide, can promote or suppress the development or function of specific CD4(+) T cell subsets by regulating antigen-presenting cell functions. In the current study, we investigated whether CCK-8 exerts a direct effect on T cells through influencing differentiation and cytokine production of distinct CD4(+) T cell subsets in vitro. Our results showed that CCK-8 differentially affects the development and function of CD4(+) T cell populations, with a negative influence on Th1 and Th17 cells and positive regulatory effect on inducible T regulatory cells (iTreg). Notably, CCK-8 suppressed Th1 while slightly enhancing Th2 development and cytokine production. Similarly, CCK-8 inhibited the differentiation of Th17 cells and promoted Foxp3 expression. L-364,718 and LY-288,513, selective antagonists of CCK1R and CCK2R, respectively, suppressed the effects of CCK-8 on CD4(+) T cell subset-specific transcription factors. Our findings strongly indicate that CCK-8 exerts a direct effect on T cells, which is dependent on CCKRs, particularly CCK2R. The collective results aid in further clarifying the mechanism underlying the anti-inflammatory and immunoregulatory effects of CCK-8.
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17
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Jia X, Cong B, Zhang J, Li H, Liu W, Chang H, Dong M, Ma C. CCK8 negatively regulates the TLR9-induced activation of human peripheral blood pDCs by targeting TRAF6 signaling. Eur J Immunol 2013; 44:489-99. [PMID: 24301797 DOI: 10.1002/eji.201343725] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 10/07/2013] [Accepted: 10/29/2013] [Indexed: 11/11/2022]
Abstract
Plasmacytoid dendritic cells (pDCs) are specialized in rapid and massive secretion of type I interferon in response to foreign nuclei acids. Combined with their antigen presentation capacity, this powerful functionality enables pDCs to orchestrate innate and adaptive immune responses. Cholecystokinin octapeptide (CCK8) is a potent immunomodulator, whose role in pDCs function is unknown. In this study, we found that two different cholecystokinin receptors, CCK1R and CCK2R, are expressed on human peripheral blood pDCs. Exogenous CCK8 was able to modulate the TLR-induced activation of pDCs, including phenotypic maturation, IFN-α synthesis and secretion, and could also regulate the potential of pDCs to induce adaptive immune responses in vitro. CCK8 inhibited TLR9-induced activation of tumor-necrosis factor receptor-associated factor 6, which is an important adapter protein in activation of interferon-regulatory factor (IRF)5 and IRF7, possibly through CCK2R, by evoking the activity of protein kinase (PK)A and reducing the activity of PKC. All these results indicate that CCK8 can inhibit the TLR9-induced phenotypic maturation and activation of pDCs, acting through CCK2R by modulating the tumor-necrosis factor receptor-associated factor 6 signaling pathways.
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Affiliation(s)
- Xianxian Jia
- Basic Medicine, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
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Straub RH, Bijlsma JWJ, Masi A, Cutolo M. Role of neuroendocrine and neuroimmune mechanisms in chronic inflammatory rheumatic diseases--the 10-year update. Semin Arthritis Rheum 2013; 43:392-404. [PMID: 23731531 DOI: 10.1016/j.semarthrit.2013.04.008] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 04/04/2013] [Accepted: 04/13/2013] [Indexed: 12/20/2022]
Abstract
BACKGROUND Neuroendocrine immunology in musculoskeletal diseases is an emerging scientific field. It deals with the aspects of efferent neuronal and neurohormonal bearing on the peripheral immune and musculoskeletal systems. This review aims to add new information that appeared since 2001. SEARCH STRATEGY The following PubMed search sentence was used to find a total of 15,462 references between 2001 and March 2013: "(rheum* OR SLE OR vasculitis) AND (nerve OR hormone OR neurotransmitter OR neuropeptide OR steroid)." In a continuous process, year by year, this search strategy yielded relevant papers that were screened and collected in a database, which build the platform of this review. RESULTS The main findings are the anti-inflammatory role of androgens, the loss of androgens (androgen drain), the bimodal role of estrogens (support B cells and inhibit macrophages and T cells), increased conversion of androgens to estrogens in inflammation (androgen drain), disturbances of the gonadal axis, inadequate amount of HPA axis hormones relative to inflammation (disproportion principle), biologics partly improve neuroendocrine axes, anti-corticotropin-releasing hormone therapies improve inflammation (antalarmin), bimodal role of the sympathetic nervous system (proinflammatory early, anti-inflammatory late-most probably due to catecholamine-producing local cells), anti-inflammatory role of alpha melanocyte-stimulating hormone, vasoactive intestinal peptide, and the Vagus nerve via α7 nicotinergic receptors. Circadian rhythms of hypothalamic origin are responsible for circadian rhythms of symptoms (neuroimmune link revealed). Important new pain-sensitizing immunological pathways were found in the last decade. CONCLUSIONS The last decade brought much new information that gave birth to the first therapies of chronic inflammatory diseases on the basis of neuroendocrine immune targets. In addition, a new theory linked evolutionary medicine, neuroendocrine regulation of distribution of energy-rich fuels, and volume regulation that can explain many disease sequelae in patients with chronic inflammatory diseases.
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Affiliation(s)
- Rainer H Straub
- Laboratory of Experimental Rheumatology and Neuroendocrino-Immunology, Division of Rheumatology, Department of Internal Medicine I, University Hospital, Regensburg, Germany.
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