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Li R, Guan Z, Bi S, Wang F, He L, Niu X, You Y, Liu Y, Ding Y, Siwko S, Wang N, Zhang Z, Jin Y, Luo J. The proton-activated G protein-coupled receptor GPR4 regulates the development of osteoarthritis via modulating CXCL12/CXCR7 signaling. Cell Death Dis 2022; 13:152. [PMID: 35165253 PMCID: PMC8844071 DOI: 10.1038/s41419-021-04455-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 11/17/2021] [Accepted: 11/29/2021] [Indexed: 12/11/2022]
Abstract
Inflammatory diseases decrease the extracellular environmental pH. However, whether proton-activated G protein-coupled receptors (GPCRs) can regulate the development of osteoarthritis (OA) is largely unknown. In this study, we report that proton-activated GPR4 is essential for OA development. We found a marked increase in expression of the proton-activated GPR4 in human and mouse OA cartilage. Lentivirus-mediated overexpression of GPR4 in mouse joints accelerated the development of OA, including promotion of articular cartilage damage, synovial hyperplasia, and osteophyte formation, while Gpr4 knockout effectively attenuated the development of posttraumatic and aging-associated OA in mice. We also found that inhibition of GPR4 with the antagonist NE52-QQ57 ameliorated OA progression in mice, promoted extracellular matrix (ECM) production, and protected cartilage from degradation in human articular cartilage explants. Moreover, GPR4 overexpression upregulated matrix-degrading enzymes’ expression and inflammation factors under pro-inflammatory and slightly acidic conditions. Mechanistically, GPR4 suppressed chondrocyte differentiation and upregulated cartilage homeostasis through NF-κB/MAPK signaling activation by regulating CXCR7/CXCL12 expression. Together, our results take the lead to illustrate that proton-activated GPCR acts as a key regulator for OA pathogenesis in vivo, and support that GPR4 could be a promising therapeutic target for OA treatment.
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Affiliation(s)
- Rong Li
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Zijing Guan
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Shuyan Bi
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Fanhua Wang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, PR China.,Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Tongji University School of Medicine, Shanghai, 201619, PR China
| | - Liang He
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, PR China.,Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Tongji University School of Medicine, Shanghai, 201619, PR China
| | - Xin Niu
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Yu You
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Yuwei Liu
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Yi Ding
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Stefan Siwko
- Department of Translational Medical Sciences, Institute of Biosciences and Technology, Texas A&M University Health Science Center, Houston, TX, 77030, USA
| | - Ning Wang
- Department of Oncology and Metabolism, The University of Sheffield, Sheffield, UK
| | - Ziming Zhang
- Department of Pediatric Orthopedics, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200092, PR China.
| | - Yunyun Jin
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, PR China.
| | - Jian Luo
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, PR China. .,Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Tongji University School of Medicine, Shanghai, 201619, PR China.
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2
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Gao H, Jin Z, Tang K, Ji Y, Suarez J, Suarez JA, Cunha e Rocha K, Zhang D, Dillmann WH, Mahata SK, Ying W. Microbial DNA Enrichment Promotes Adrenomedullary Inflammation, Catecholamine Secretion, and Hypertension in Obese Mice. J Am Heart Assoc 2022; 11:e024561. [PMID: 35112881 PMCID: PMC9245808 DOI: 10.1161/jaha.121.024561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background Obesity is an established risk factor for hypertension. Although obesity‐induced gut barrier breach leads to the leakage of various microbiota‐derived products into host circulation and distal organs, the roles of microbiota in mediating the development of obesity‐associated adrenomedullary disorders and hypertension have not been elucidated. We seek to explore the impacts of microbial DNA enrichment on inducing obesity‐related adrenomedullary abnormalities and hypertension. Methods and Results Obesity was accompanied by remarkable bacterial DNA accumulation and elevated inflammation in the adrenal glands. Gut microbial DNA containing extracellular vesicles (mEVs) were readily leaked into the bloodstream and infiltrated into the adrenal glands in obese mice, causing microbial DNA enrichment. In lean wild‐type mice, adrenal macrophages expressed CRIg (complement receptor of the immunoglobulin superfamily) that efficiently blocks the infiltration of gut mEVs. In contrast, the adrenal CRIg+ cell population was greatly decreased in obese mice. In lean CRIg−/− or C3−/− (complement component 3) mice intravenously injected with gut mEVs, adrenal microbial DNA accumulation elevated adrenal inflammation and norepinephrine secretion, concomitant with hypertension. In addition, microbial DNA promoted inflammatory responses and norepinephrine production in rat pheochromocytoma PC12 cells treated with gut mEVs. Depletion of microbial DNA cargo markedly blunted the effects of gut mEVs. We also validated that activation of cGAS (cyclic GMP‐AMP synthase)/STING (cyclic GMP–AMP receptor stimulator of interferon genes) signaling is required for the ability of microbial DNA to trigger adrenomedullary dysfunctions in both in vivo and in vitro experiments. Restoring CRIg+ cells in obese mice decreased microbial DNA abundance, inflammation, and hypertension. Conclusions The leakage of gut mEVs leads to adrenal enrichment of microbial DNA that are pathogenic to induce obesity‐associated adrenomedullary abnormalities and hypertension. Recovering the CRIg+ macrophage population attenuates obesity‐induced adrenomedullary disorders.
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Affiliation(s)
- Hong Gao
- Division of Endocrinology & MetabolismDepartment of MedicineUniversity of California, San DiegoLa JollaCA
| | - Zhongmou Jin
- Division of Biological SciencesUniversity of California, San DiegoLa JollaCA
| | | | - Yudong Ji
- Division of Endocrinology & MetabolismDepartment of MedicineUniversity of California, San DiegoLa JollaCA
- Department of AnesthesiologyInstitute of Anesthesiology and Critical CareUnion HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina
| | - Jorge Suarez
- Division of Endocrinology & MetabolismDepartment of MedicineUniversity of California, San DiegoLa JollaCA
| | - Jorge A. Suarez
- Division of Endocrinology & MetabolismDepartment of MedicineUniversity of California, San DiegoLa JollaCA
| | - Karina Cunha e Rocha
- Division of Endocrinology & MetabolismDepartment of MedicineUniversity of California, San DiegoLa JollaCA
| | - Dinghong Zhang
- Division of Endocrinology & MetabolismDepartment of MedicineUniversity of California, San DiegoLa JollaCA
| | - Wolfgang H. Dillmann
- Division of Endocrinology & MetabolismDepartment of MedicineUniversity of California, San DiegoLa JollaCA
| | - Sushil K. Mahata
- Division of Endocrinology & MetabolismDepartment of MedicineUniversity of California, San DiegoLa JollaCA
- VA San Diego Healthcare SystemSan DiegoCA
| | - Wei Ying
- Division of Endocrinology & MetabolismDepartment of MedicineUniversity of California, San DiegoLa JollaCA
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3
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Xu Y, Yu L, Liu Y, Tang X, Wang X. Lipopolysaccharide-Induced Microglial Neuroinflammation: Attenuation by FK866. Neurochem Res 2021; 46:1291-1304. [PMID: 33713324 DOI: 10.1007/s11064-021-03267-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 01/21/2021] [Accepted: 02/03/2021] [Indexed: 12/12/2022]
Abstract
Alleviating microglia-mediated neuroinflammation bears great promise to reduce neurodegeneration. Nicotinamide phosphoribosyltransferase (NAMPT) may exert cytokine-like effect in the brain. However, it remains unclear about role of NAMPT in microglial inflammation. Also, it remains unknown about effect of NAMPT inhibition on microglial inflammation. In the present study, we observed that FK866 (a specific noncompetitive NAMPT inhibitor) dose-dependently inhibited lipopolysaccharide (LPS)-induced proinflammatory mediator (interleukin (IL)-6, IL-1β, inducible nitric oxide synthase, nitric oxide and reactive species) level increase in BV2 microglia cultures. FK866 also significantly inhibited LPS-induced polarization change in microglia. Furthermore, LPS significantly increased NAMPT expression and nuclear factor kappa B (NF-κB) phosphorylation in microglia. FK866 significantly decreased NAMPT expression and NF-κB phosphorylation in LPS-treated microglia. Finally, conditioned medium from microglia cultures co-treated with FK866 and LPS significantly increased SH-SY5Y and PC12 cell viability compared with conditioned medium from microglia cultures treated with LPS alone. Our study strongly indicates that NAMPT may be a promising target for microglia modulation and NAMPT inhibition may attenuate microglial inflammation.
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Affiliation(s)
- Yaling Xu
- Department of Neurology, Xinhua Hospital Affiliated To Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China
| | - Lijia Yu
- Department of Neurology, Xinhua Hospital Affiliated To Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China
| | - Ying Liu
- Department of Neurology, Xinhua Hospital Affiliated To Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China
| | - Xiaohui Tang
- Department of Neurology, Xinhua Hospital Affiliated To Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China
| | - Xijin Wang
- Department of Neurology, Xinhua Hospital Affiliated To Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China.
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4
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Tcymbarevich I, Richards SM, Russo G, Kühn-Georgijevic J, Cosin-Roger J, Baebler K, Lang S, Bengs S, Atrott K, Bettoni C, Gruber S, Frey-Wagner I, Scharl M, Misselwitz B, Wagner CA, Seuwen K, Rogler G, Ruiz PA, Spalinger M, de Vallière C. Lack of the pH-sensing Receptor TDAG8 [GPR65] in Macrophages Plays a Detrimental Role in Murine Models of Inflammatory Bowel Disease. J Crohns Colitis 2019; 13:245-258. [PMID: 30535144 DOI: 10.1093/ecco-jcc/jjy152] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Tissue inflammation in inflammatory bowel diseases [IBD] is associated with local acidification. Genetic variants in the pH-sensing G protein-coupled receptor 65, also known as T cell death-associated gene 8 [TDAG8], have been implicated in IBD and other autoimmune diseases. Since the role of TDAG8 in intestinal inflammation remains unclear, we investigated the function of TDAG8 using murine colitis models. METHODS The effects of TDAG8 deficiency were assessed in dextran sodium sulphate [DSS], IL-10-/-, and T cell transfer colitis murine models. RNA sequencing of acidosis-activated TDAG8-/- and wild-type [WT] peritoneal macrophages [MΦs] was performed. RESULTS mRNA expression of IFN-γ, TNF, IL-6, and iNOS in TDAG8-/- mice increased significantly in colonic lymphoid patches and in colonic tissue in acute and chronic DSS colitis, respectively. In transfer colitis, there was a trend towards increased IFN-γ, iNOS, and IL-6 expression in mice receiving TDAG8-/- T cells. However, absence of TDAG8 did not lead to changes in clinical scores in the models tested. Increased numbers of infiltrating MΦs and neutrophils, but not CD3+ T cells, were observed in DSS-treated TDAG8-/- mice. No differences in infiltrating CD3+ T cells were observed between mice receiving TDAG8-/- or WT naïve T cells in transfer colitis. RNA sequencing showed that acidosis activation of TDAG8 in MΦs modulated the expression of immune response genes. CONCLUSIONS TDAG8 deficiency triggers colonic MΦ and neutrophil infiltration, and expression of pro-inflammatory mediators in DSS colitis models. In transfer colitis, mice receiving TDAG8-/- T cells presented a significantly higher spleen weight and a tendency towards increased expression of pro-inflammatory markers of monocyte/MΦ activity.
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Affiliation(s)
- Irina Tcymbarevich
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland
| | | | - Giancarlo Russo
- Functional Genomics Center Zurich, ETH Zurich/University of Zurich, Zurich, Switzerland
| | | | - Jesus Cosin-Roger
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland
| | - Katharina Baebler
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland
| | - Silvia Lang
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland
| | - Susan Bengs
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland
| | - Kirstin Atrott
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland
| | - Carla Bettoni
- Institute of Physiology, University of Zurich, Switzerland
| | - Sven Gruber
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland.,Institute of Physiology, University of Zurich, Switzerland
| | - Isabelle Frey-Wagner
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland
| | - Michael Scharl
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland.,Zurich Center for Integrative Human Physiology, Zurich, Switzerland
| | - Benjamin Misselwitz
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland
| | - Carsten A Wagner
- Institute of Physiology, University of Zurich, Switzerland.,Zurich Center for Integrative Human Physiology, Zurich, Switzerland
| | - Klaus Seuwen
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Gerhard Rogler
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland.,Zurich Center for Integrative Human Physiology, Zurich, Switzerland
| | - Pedro A Ruiz
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland
| | - Marianne Spalinger
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland
| | - Cheryl de Vallière
- Department of Gastroenterology and Hepatology, University Hospital Zürich, University of Zurich, Switzerland
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5
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Prezotto LD, Thorson JF, Borowicz PP, Peine JL, Bedenbaugh M, Hileman SM, Lents CA, Caton JS, Swanson KC. Influences of maternal nutrient restriction and arginine supplementation on visceral metabolism and hypothalamic circuitry of offspring. Domest Anim Endocrinol 2018; 65:71-79. [PMID: 30007131 DOI: 10.1016/j.domaniend.2018.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 04/23/2018] [Accepted: 06/13/2018] [Indexed: 11/17/2022]
Abstract
Maternal nutrient restriction during gestation can exert long-term negative effects on offspring health and performance. Arginine supplementation may rescue some of the negative effects elicited by maternal nutrient restriction. We tested the hypothesis that maternal arginine supplementation during gestation would rescue deleterious effects of nutrient restriction on in vitro O2 consumption in the liver and jejunum and hypothalamic protein expression of proopiomelanocortin (POMC), neuropeptide Y (NPY), agouti-related peptide (AgRP), and neuronal nitric oxide synthase (nNOS), and the colocalization of nNOS and active phosphor-signal transducer and activator of transcription 3 (pSTAT3) in female offspring. Multiparous ewes were assigned to dietary treatment at 54 d of gestation: 100% of requirements (Con), 60% of control (Res), or Res plus rumen-protected arginine (Res-Arg; 180 mg/kg). At parturition, offspring were immediately removed from their dam and placed on a common diet. At 54 ± 4 d of age, female lambs (n = 6 per treatment) were weighed, the liver and jejunum were weighed, and samples were collected for in vitro measurement of O2 consumption. The hypothalamus was collected to determine protein expression of POMC, NPY, AgRP, and nNOS, and the colocalization of nNOS and pSTAT3 (n = 3, 4, and 4 for Con, Res, and Res-Arg, respectively). Hepatic consumption of O2 in vitro (mol/min/liver) was decreased (P = 0.04) in the Res and Res-Arg group compared with Con. Intensity of staining for NPY-containing fibers tended to decrease (P = 0.10) in Res and Res-Arg compared with Con. Number of POMC neuronal cells in the arcuate nucleus (ARC) of the hypothalamus decreased (P ≤ 0.03) in the Res group compared with Res-Arg. These observations demonstrate that maternal nutrient restriction decreases energy utilization in the liver and number of POMC cells in the ARC of offspring. Supplementation of arginine to the gestating ewe failed to influence hepatic use of energy in lambs from Res ewes. Numbers of POMC-containing cells were increased in the ARC in lambs from ewes restricted to 60% of nutritional requirements and supplemented with rumen-protected arginine, potentially influencing feeding behavior and hepatic energy metabolism.
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Affiliation(s)
- Ligia D Prezotto
- Department of Animal Sciences, North Dakota State University, Hultz Hall 166, Dept. 7630, PO Box 6050, Fargo 58108, USA; Northern Agricultural Research Center, Montana State University, 3710 Assinniboine Road, Havre 59501, USA
| | - Jennifer F Thorson
- Northern Agricultural Research Center, Montana State University, 3710 Assinniboine Road, Havre 59501, USA; USDA, ARS, U.S. Meat Animal Research Center, P.O. Box 166, Clay Center 68933, USA
| | - Pawel P Borowicz
- Department of Animal Sciences, North Dakota State University, Hultz Hall 166, Dept. 7630, PO Box 6050, Fargo 58108, USA
| | - Jena L Peine
- Department of Animal Sciences, North Dakota State University, Hultz Hall 166, Dept. 7630, PO Box 6050, Fargo 58108, USA
| | - Michelle Bedenbaugh
- Department of Physiology & Pharmacology, West Virginia University, Morgantown, WV 26506, USA
| | - Stanley M Hileman
- Department of Physiology & Pharmacology, West Virginia University, Morgantown, WV 26506, USA
| | - Clay A Lents
- USDA, ARS, U.S. Meat Animal Research Center, P.O. Box 166, Clay Center 68933, USA
| | - Joel S Caton
- Department of Animal Sciences, North Dakota State University, Hultz Hall 166, Dept. 7630, PO Box 6050, Fargo 58108, USA
| | - Kendall C Swanson
- Department of Animal Sciences, North Dakota State University, Hultz Hall 166, Dept. 7630, PO Box 6050, Fargo 58108, USA.
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6
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Abstract
Purpose of Review Interferon-gamma (IFN-γ) is a pro-inflammatory cytokine that participates in the regulation of hematopoietic stem cells (HSC) during development and under homeostatic conditions. IFN-γ also plays a key pathogenic role in several diseases that affect hematopoiesis including aplastic anemia, hemophagocytic lymphohistiocytosis, and cirrhosis of the liver. Recent Findings Studies have shown that increased IFN-γ negatively affects HSC homeostasis, skewing HSC towards differentiation over self-renewal and eventually causing exhaustion of the HSC compartment. Summary Here, we explore the mechanisms by which IFN-γ regulates HSC in both normal and pathological conditions. We focus on the role of IFN-γ signaling in HSC fate decisions, and the transcriptional changes it elicits. Elucidating the mechanisms through which IFN-γ regulates HSCs may lead to new therapeutic options to prevent or treat adverse hematologic effects of the many diseases to which IFN-γ contributes.
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7
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Byrne CJ, Khurana S, Kumar A, Tai TC. Inflammatory Signaling in Hypertension: Regulation of Adrenal Catecholamine Biosynthesis. Front Endocrinol (Lausanne) 2018; 9:343. [PMID: 30013513 PMCID: PMC6036303 DOI: 10.3389/fendo.2018.00343] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 06/07/2018] [Indexed: 12/24/2022] Open
Abstract
The immune system is increasingly recognized for its role in the genesis and progression of hypertension. The adrenal gland is a major site that coordinates the stress response via the hypothalamic-pituitary-adrenal axis and the sympathetic-adrenal system. Catecholamines released from the adrenal medulla function in the neuro-hormonal regulation of blood pressure and have a well-established link to hypertension. The immune system has an active role in the progression of hypertension and cytokines are powerful modulators of adrenal cell function. Adrenal medullary cells integrate neural, hormonal, and immune signals. Changes in adrenal cytokines during the progression of hypertension may promote blood pressure elevation by influencing catecholamine biosynthesis. This review highlights the potential interactions of cytokine signaling networks with those of catecholamine biosynthesis within the adrenal, and discusses the role of cytokines in the coordination of blood pressure regulation and the stress response.
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Affiliation(s)
- Collin J. Byrne
- Department of Biology, Laurentian University, Sudbury, ON, Canada
| | - Sandhya Khurana
- Medical Sciences Division, Northern Ontario School of Medicine, Sudbury, ON, Canada
| | - Aseem Kumar
- Department of Chemistry and Biochemistry, Laurentian University, Sudbury, ON, Canada
- Biomolecular Sciences Program, Laurentian University, Sudbury, ON, Canada
| | - T. C. Tai
- Department of Biology, Laurentian University, Sudbury, ON, Canada
- Medical Sciences Division, Northern Ontario School of Medicine, Sudbury, ON, Canada
- Department of Chemistry and Biochemistry, Laurentian University, Sudbury, ON, Canada
- Biomolecular Sciences Program, Laurentian University, Sudbury, ON, Canada
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8
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Wang Y, de Vallière C, Imenez Silva PH, Leonardi I, Gruber S, Gerstgrasser A, Melhem H, Weber A, Leucht K, Wolfram L, Hausmann M, Krieg C, Thomasson K, Boyman O, Frey-Wagner I, Rogler G, Wagner CA. The Proton-activated Receptor GPR4 Modulates Intestinal Inflammation. J Crohns Colitis 2018; 12:355-368. [PMID: 29136128 DOI: 10.1093/ecco-jcc/jjx147] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Accepted: 11/02/2017] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS During active inflammation, intraluminal intestinal pH is decreased in patients with inflammatory bowel disease [IBD]. Acidic pH may play a role in IBD pathophysiology. Recently, proton-sensing G-protein coupled receptors were identified, including GPR4, OGR1 [GPR68], and TDAG8 [GPR65]. We investigated whether GPR4 is involved in intestinal inflammation. METHODS The role of GPR4 was assessed in murine colitis models by chronic dextran sulphate sodium [DSS] administration and by cross-breeding into an IL-10 deficient background for development of spontaneous colitis. Colitis severity was assessed by body weight, colonoscopy, colon length, histological score, cytokine mRNA expression, and myeloperoxidase [MPO] activity. In the spontaneous Il-10-/- colitis model, the incidence of rectal prolapse and characteristics of lamina propria leukocytes [LPLs] were analysed. RESULTS Gpr4-/- mice showed reduced body weight loss and histology score after induction of chronic DSS colitis. In Gpr4-/-/Il-10-/- double knock-outs, the onset and progression of rectal prolapse were significantly delayed and mitigated compared with Gpr4+/+/Il-10-/- mice. Double knock-out mice showed lower histology scores, MPO activity, CD4+ T helper cell infiltration, IFN-γ, iNOS, MCP-1 [CCL2], CXCL1, and CXCL2 expression compared with controls. In colon, GPR4 mRNA was detected in endothelial cells, some smooth muscle cells, and some macrophages. CONCLUSIONS Absence of GPR4 ameliorates colitis in IBD animal models, indicating an important regulatory role in mucosal inflammation, thus providing a new link between tissue pH and the immune system. Therapeutic inhibition of GPR4 may be beneficial for the treatment of IBD.
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Affiliation(s)
- Yu Wang
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland.,Institute of Physiology, University of Zurich, Zurich, Switzerland
| | - Cheryl de Vallière
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | | | - Irina Leonardi
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Sven Gruber
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland.,Institute of Physiology, University of Zurich, Zurich, Switzerland
| | - Alexandra Gerstgrasser
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Hassan Melhem
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Achim Weber
- Institute of Surgical Pathology, University Hospital Zurich, Zurich, Switzerland
| | - Katharina Leucht
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Lutz Wolfram
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Martin Hausmann
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Carsten Krieg
- Laboratory of Applied Immunobiology, University of Zurich, Zurich, Switzerland.,Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Koray Thomasson
- Laboratory of Applied Immunobiology, University of Zurich, Zurich, Switzerland
| | - Onur Boyman
- Laboratory of Applied Immunobiology, University of Zurich, Zurich, Switzerland.,Department of Immunology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Isabelle Frey-Wagner
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Gerhard Rogler
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland.,Institute of Physiology, University of Zurich, Zurich, Switzerland
| | - Carsten A Wagner
- Institute of Physiology, University of Zurich, Zurich, Switzerland
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9
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Lee SH, Kwon JY, Kim SY, Jung K, Cho ML. Interferon-gamma regulates inflammatory cell death by targeting necroptosis in experimental autoimmune arthritis. Sci Rep 2017; 7:10133. [PMID: 28860618 PMCID: PMC5579272 DOI: 10.1038/s41598-017-09767-0] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 07/28/2017] [Indexed: 02/06/2023] Open
Abstract
Interferon γ (IFN-γ) induces an inflammatory response and apoptotic cell death. Rheumatoid arthritis (RA) is a systemic inflammatory disease associated with increased levels of inflammatory mediators, including tumour necrosis factor α (TNF-α) and T helper (Th) 17 cells, and downregulation of apoptosis of inflammatory cells. We hypothesized that IFN-γ would reduce inflammatory cell death in vitro and that loss of IFN-γ would aggravate inflammation in vivo. IFN-γ downregulated necroptosis and the expression of cellular FLICE-like inhibitory protein (cFLIPL) and mixed lineage kinase domain-like (MLKL). However, loss of IFN-γ promoted the production of cFLIPL and MLKL, and necroptosis. IFN-γ deficiency increased Th17 cell number and upregulated the expression of IL-17 and TNF-α. Expression of MLKL, receptor interacting protein kinase (RIPK)1, and RIPK3 was increased in the joints of mice with collagen-induced arthritis (CIA). Compared with wild-type mice with CIA, IFN-γ−/− CIA mice showed exacerbation of cartilage damage and joint inflammation, and acceleration of MLKL, RIPK1, and RIPK3 production in the joints. IFN-γ deficiency induced the activation of signal transducer and activator of transcription 3. These results suggest that IFN-γ regulates inflammatory cell death and may have potential for use in the treatment of RA.
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Affiliation(s)
- Seung Hoon Lee
- The Rheumatism Research Center, Catholic Research Institute of Medical Science, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Ji Ye Kwon
- The Rheumatism Research Center, Catholic Research Institute of Medical Science, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Se-Young Kim
- The Rheumatism Research Center, Catholic Research Institute of Medical Science, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | | | - Mi-La Cho
- The Rheumatism Research Center, Catholic Research Institute of Medical Science, College of Medicine, The Catholic University of Korea, Seoul, South Korea. .,Laboratory of Immune Network, Conversant Research Consortium in Immunologic disease, College of Medicine, The Catholic University of Korea, Seoul, South Korea.
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10
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Sánchez-Mendoza EH, Bellver-Landete V, Arce C, Doeppner TR, Hermann DM, Oset-Gasque MJ. Vesicular glutamate transporters play a role in neuronal differentiation of cultured SVZ-derived neural precursor cells. PLoS One 2017; 12:e0177069. [PMID: 28493916 PMCID: PMC5426660 DOI: 10.1371/journal.pone.0177069] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 04/22/2017] [Indexed: 11/19/2022] Open
Abstract
The role of glutamate in the regulation of neurogenesis is well-established, but the role of vesicular glutamate transporters (VGLUTs) and excitatory amino acid transporters (EAATs) in controlling adult neurogenesis is unknown. Here we investigated the implication of VGLUTs in the differentiation of subventricular zone (SVZ)-derived neural precursor cells (NPCs). Our results show that NPCs express VGLUT1-3 and EAAT1-3 both at the mRNA and protein level. Their expression increases during differentiation closely associated with the expression of marker genes. In expression analyses we show that VGLUT1 and VGLUT2 are preferentially expressed by cultured SVZ-derived doublecortin+ neuroblasts, while VGLUT3 is found on GFAP+ glial cells. In cultured NPCs, inhibition of VGLUT by Evans Blue increased the mRNA level of neuronal markers doublecortin, B3T and MAP2, elevated the number of NPCs expressing doublecortin protein and promoted the number of cells with morphological appearance of branched neurons, suggesting that VGLUT function prevents neuronal differentiation of NPCs. This survival- and differentiation-promoting effect of Evans blue was corroborated by increased AKT phosphorylation and reduced MAPK phosphorylation. Thus, under physiological conditions, VGLUT1-3 inhibition, and thus decreased glutamate exocytosis, may promote neuronal differentiation of NPCs.
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Affiliation(s)
- Eduardo H. Sánchez-Mendoza
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain
- Department of Neurology, University of Duisburg-Essen, Essen, Germany
| | - Victor Bellver-Landete
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain
| | - Carmen Arce
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain
| | - Thorsten R. Doeppner
- Department of Neurology, University of Göttingen Medical School, Göttingen, Germany
| | - Dirk M. Hermann
- Department of Neurology, University of Duisburg-Essen, Essen, Germany
| | - María Jesús Oset-Gasque
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain
- Instituto Universitario de Investigación en Neuroquímica (IUIN), Universidad Complutense de Madrid (UCM), Madrid, Spain
- * E-mail:
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11
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Ong LK, Page S, Briggs GD, Guan L, Dun MD, Verrills NM, Dunkley PR, Dickson PW. Peripheral Lipopolysaccharide Challenge Induces Long-Term Changes in Tyrosine Hydroxylase Regulation in the Adrenal Medulla. J Cell Biochem 2017; 118:2096-2107. [DOI: 10.1002/jcb.25839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 12/12/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Lin Kooi Ong
- School of Biomedical Sciences and Pharmacy and Hunter Medical Research Institute; University of Newcastle; Callaghan NSW 2308 Australia
| | - Scott Page
- School of Biomedical Sciences and Pharmacy and Hunter Medical Research Institute; University of Newcastle; Callaghan NSW 2308 Australia
| | - Gabrielle D. Briggs
- School of Biomedical Sciences and Pharmacy and Hunter Medical Research Institute; University of Newcastle; Callaghan NSW 2308 Australia
| | - Liying Guan
- School of Biomedical Sciences and Pharmacy and Hunter Medical Research Institute; University of Newcastle; Callaghan NSW 2308 Australia
| | - Matthew D. Dun
- School of Biomedical Sciences and Pharmacy and Hunter Medical Research Institute; University of Newcastle; Callaghan NSW 2308 Australia
| | - Nicole M. Verrills
- School of Biomedical Sciences and Pharmacy and Hunter Medical Research Institute; University of Newcastle; Callaghan NSW 2308 Australia
| | - Peter R. Dunkley
- School of Biomedical Sciences and Pharmacy and Hunter Medical Research Institute; University of Newcastle; Callaghan NSW 2308 Australia
| | - Phillip W. Dickson
- School of Biomedical Sciences and Pharmacy and Hunter Medical Research Institute; University of Newcastle; Callaghan NSW 2308 Australia
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12
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Jenkins DE, Sreenivasan D, Carman F, Samal B, Eiden LE, Bunn SJ. Interleukin-6-mediated signaling in adrenal medullary chromaffin cells. J Neurochem 2016; 139:1138-1150. [PMID: 27770433 DOI: 10.1111/jnc.13870] [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: 08/25/2016] [Revised: 10/13/2016] [Accepted: 10/14/2016] [Indexed: 12/13/2022]
Abstract
The pro-inflammatory cytokines, tumor necrosis factor-α, and interleukin-1β/α modulate catecholamine secretion, and long-term gene regulation, in chromaffin cells of the adrenal medulla. Since interleukin-6 (IL6) also plays a key integrative role during inflammation, we have examined its ability to affect both tyrosine hydroxylase activity and adrenomedullary gene transcription in cultured bovine chromaffin cells. IL6 caused acute tyrosine/threonine phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2), and serine/tyrosine phosphorylation of signal transducer and activator of transcription 3 (STAT3). Consistent with ERK1/2 activation, IL6 rapidly increased tyrosine hydroxylase phosphorylation (serine-31) and activity, as well as up-regulated genes, encoding secreted proteins including galanin, vasoactive intestinal peptide, gastrin-releasing peptide, and parathyroid hormone-like hormone. The effects of IL6 on the entire bovine chromaffin cell transcriptome were compared to those generated by G-protein-coupled receptor (GPCR) agonists (histamine and pituitary adenylate cyclase-activating polypeptide) and the cytokine receptor agonists (interferon-α and tumor necrosis factor-α). Of 90 genes up-regulated by IL6, only 16 are known targets of IL6 in the immune system. Those remaining likely represent a combination of novel IL6/STAT3 targets, ERK1/2 targets and, potentially, IL6-dependent genes activated by IL6-induced transcription factors, such as hypoxia-inducible factor 1α. Notably, genes induced by IL6 include both neuroendocrine-specific genes activated by GPCR agonists, and transcripts also activated by the cytokines. These results suggest an integrative role for IL6 in the fine-tuning of the chromaffin cell response to a wide range of physiological and paraphysiological stressors, particularly when immune and endocrine stimuli converge.
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Affiliation(s)
- Danielle E Jenkins
- Department of Anatomy, Centre for Neuroendocrinology, Otago School of Medical Sciences, University of Otago, Dunedin, New Zealand
| | | | - Fiona Carman
- Department of Anatomy, Centre for Neuroendocrinology, Otago School of Medical Sciences, University of Otago, Dunedin, New Zealand
| | - Babru Samal
- Section on Molecular Neuroscience, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, Bethesda, MD, USA
| | - Lee E Eiden
- Section on Molecular Neuroscience, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, Bethesda, MD, USA
| | - Stephen J Bunn
- Department of Anatomy, Centre for Neuroendocrinology, Otago School of Medical Sciences, University of Otago, Dunedin, New Zealand
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13
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Kobayashi Y, Yoshimoto Y, Yamamoto Y, Kimura K, Okuda K. Roles of EDNs in regulating oviductal NO synthesis and smooth muscle motility in cows. Reproduction 2016; 151:615-22. [PMID: 26980806 DOI: 10.1530/rep-15-0586] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 03/15/2016] [Indexed: 12/12/2022]
Abstract
Endothelins (EDNs) participate in various physiological events including smooth muscle contraction, nitric oxide (NO) synthesis, and embryonic development. In this study, we investigated the regional roles of EDNs produced by bovine oviductal epithelial cells in NO synthesis and smooth muscle motility. Quantification of mRNA expressions indicated that expression of EDN receptor B (EDNRB) in the ampullary region was higher after ovulation than before ovulation, whereas expression of EDNRA in the isthmic region was higher after ovulation than before ovulation. Immunohistochemistry revealed that the EDN receptors (EDNRA and EDNRB) were expressed in the epithelium, whereas smooth muscle showed positive staining only for EDNRA. The expressionsPlease suggest whether 'NOS2' can be treated as the updated symbol for 'iNOS' as per gene nomenclature. of inducible NO synthase (iNOS) protein and its mRNA (NOS2) in cultured epithelial cells isolated from the ampulla were stimulated by EDN1, but not by EDN2 or EDN3, after 1h of incubation. In isthmic epithelial cells, none of the EDNs affected the expression of NOS2 Isometric contraction tests indicated that spontaneous waves were strong in the isthmic region but weak in the ampullary region. EDN1 modulated smooth muscle motility in both the regions. The overall findings suggest that EDN1 plays region-specific roles in smooth muscle motility and epithelial NO synthesis, providing an optimal oviductal microenvironment for transport of gametes, fertilization, and development/transport of early embryo.
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Affiliation(s)
- Yoshihiko Kobayashi
- Laboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Yuka Yoshimoto
- Laboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Yuki Yamamoto
- Laboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Koji Kimura
- Laboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Kiyoshi Okuda
- Laboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama, Japan Obihiro University of Agriculture and Veterinary MedicineHokkaido, Japan
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14
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Amini E, Rezaei M, Mohamed Ibrahim N, Golpich M, Ghasemi R, Mohamed Z, Raymond AA, Dargahi L, Ahmadiani A. A Molecular Approach to Epilepsy Management: from Current Therapeutic Methods to Preconditioning Efforts. Mol Neurobiol 2014; 52:492-513. [PMID: 25195699 DOI: 10.1007/s12035-014-8876-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Accepted: 08/25/2014] [Indexed: 01/16/2023]
Abstract
Epilepsy is the most common and chronic neurological disorder characterized by recurrent unprovoked seizures. The key aim in treating patients with epilepsy is the suppression of seizures. An understanding of focal changes that are involved in epileptogenesis may therefore provide novel approaches for optimal treatment of the seizure. Although the actual pathogenesis of epilepsy is still uncertain, recently growing lines of evidence declare that microglia and astrocyte activation, oxidative stress and reactive oxygen species (ROS) production, mitochondria dysfunction, and damage of blood-brain barrier (BBB) are involved in its pathogenesis. Impaired GABAergic function in the brain is probably the most accepted hypothesis regarding the pathogenesis of epilepsy. Clinical neuroimaging of patients and experimental modeling have demonstrated that seizures may induce neuronal apoptosis. Apoptosis signaling pathways are involved in the pathogenesis of several types of epilepsy such as temporal lobe epilepsy (TLE). The quality of life of patients is seriously affected by treatment-related problems and also by unpredictability of epileptic seizures. Moreover, the available antiepileptic drugs (AED) are not significantly effective to prevent epileptogenesis. Thus, novel therapies that are proficient to control seizure in people who are suffering from epilepsy are needed. The preconditioning method promises to serve as an alternative therapeutic approach because this strategy has demonstrated the capability to curtail epileptogenesis. For this reason, understanding of molecular mechanisms underlying brain tolerance induced by preconditioning is crucial to delineate new neuroprotective ways against seizure damage and epileptogenesis. In this review, we summarize the work to date on the pathogenesis of epilepsy and discuss recent therapeutic strategies in the treatment of epilepsy. We will highlight that novel therapy targeting such as preconditioning process holds great promise. In addition, we will also highlight the role of gene reprogramming and mitochondrial biogenesis in the preconditioning-mediated neuroprotective events.
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Affiliation(s)
- Elham Amini
- Department of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Cheras, Kuala Lumpur, Malaysia
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15
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Increases in interleukin-6 and interferon-gamma levels is progressive in immature rats with varicocele. Ir J Med Sci 2014; 184:531-7. [DOI: 10.1007/s11845-014-1167-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 06/29/2014] [Indexed: 10/24/2022]
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16
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Pérez-Rodríguez R, Oliván AM, Roncero C, Morón-Oset J, González MP, Oset-Gasque MJ. Glutamate triggers neurosecretion and apoptosis in bovine chromaffin cells through a mechanism involving NO production by neuronal NO synthase activation. Free Radic Biol Med 2014; 69:390-402. [PMID: 24486340 DOI: 10.1016/j.freeradbiomed.2014.01.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Revised: 01/20/2014] [Accepted: 01/22/2014] [Indexed: 11/30/2022]
Abstract
Previous work from our group stated that nitric oxide (NO), via cytokines, induces apoptosis in chromaffin cells by a mechanism involving iNOS, nNOS, and NF-κB. In this paper the involvement of glutamate as a possible intracellular trigger of neurosecretion and NO-mediated apoptosis has been evaluated. We show that chromaffin cells express different ionotropic and metabotropic glutamate receptors, this exerting different effects on the regulation of basal and glutamate-induced catecholamine secretion, via NO/cGMP. In addition, we studied the effects of endogenously generated NO, both basal and glutamate-stimulated, on apoptosis of chromaffin cells. Our results show that glutamate agonists are able to induce cell death and apoptosis in bovine chromaffin cells, parallel to an increase in NO production. Such effects were reversed by NOS inhibitors and glutamate receptor antagonists. Under basal conditions, iNOS inhibitors did not have any effect on apoptosis, whereas nNOS inhibitors induced apoptosis, indicating a neuroprotective effect of constitutive nNOS-generated NO. In contrast, glutamate-induced apoptosis was strongly reversed by nNOS inhibitors and weakly by iNOS inhibitors, thus indicating nNOS involvement in glutamate-mediated apoptosis. These results were confirmed by the fact that nNOS expression, but not iNOS, is specifically activated by glutamate. Finally, our results suggest the participation of PKG, PKA, PKC, and MAPK pathways in glutamate-mediated nNOS activation in chromaffin cells and point out the involvement of both PKA and PKC signaling pathways in the apoptotic effect of glutamate.
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Affiliation(s)
- R Pérez-Rodríguez
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, E-28040 Madrid, Spain
| | - A M Oliván
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, E-28040 Madrid, Spain
| | - C Roncero
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, E-28040 Madrid, Spain
| | - J Morón-Oset
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, E-28040 Madrid, Spain
| | - M P González
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, E-28040 Madrid, Spain
| | - M J Oset-Gasque
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, E-28040 Madrid, Spain.
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17
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Kant S, Kumar A, Singh SM. Tumor growth retardation and chemosensitizing action of fatty acid synthase inhibitor orlistat on T cell lymphoma: implication of reconstituted tumor microenvironment and multidrug resistance phenotype. Biochim Biophys Acta Gen Subj 2013; 1840:294-302. [PMID: 24060750 DOI: 10.1016/j.bbagen.2013.09.020] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 08/23/2013] [Accepted: 09/13/2013] [Indexed: 12/14/2022]
Abstract
BACKGROUND Orlistat, a fatty acid synthase (FASN) inhibitor, has been demonstrated to inhibit tumor cell survival. However, the mechanism(s) of its tumor growth retarding action against malignancies of hematological origin remains unclear. It is also not understood if the antitumor action of orlistat implicates modulated susceptibility of tumor cell to anticancer drugs. Therefore, the present investigation focuses to study the antitumor and chemosensitizing action of orlistat in a murine host bearing a progressively growing T cell lymphoma. METHODS Tumor-bearing mice were administered with vehicle alone or containing orlistat followed by administration of PBS with or without cisplatin. Tumor progression and survival of tumor-bearing host were monitored along with analysis of tumor cell survival and apoptosis. Tumor ascitic fluid was examined for pH, NO and cytokines. Expression of genes and proteins was investigated by RT-PCR and western blot respectively. ROS was analyzed by DCFDA staining and FASN activity by spectrophotometry. RESULTS Orlistat administration to tumor-bearing mice resulted in tumor growth retardation, prolonged life span, declined tumor cell survival and chemosensitization to cisplatin. It was accompanied by increased osmotic fragility, modulated acidosis, expression of ROS, NO, cytokines, MCT-1 and VH(+) ATPase, Bcl2, Caspase-3, P53, inhibited FASN activity and declined expression of MDR and MRP-1 proteins. CONCLUSION Orlistat manifests antitumor and chemosensitizing action implicating modulated regulation of cell survival, reconstituted-tumor microenvironment and altered MDR phenotype. GENERAL SIGNIFICANCE These observations indicate that orlistat could be utilized as an adjunct regimen for improving antitumor efficacy of cisplatin.
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Affiliation(s)
- Shiva Kant
- School of Biotechnology, Banaras Hindu University, Varanasi 221005, India
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18
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Inhibitory effect of citrinin on lipopolisaccharide-induced nitric oxide production by mouse macrophage cells. Mycotoxin Res 2013; 29:229-34. [DOI: 10.1007/s12550-013-0175-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 07/09/2013] [Accepted: 07/12/2013] [Indexed: 01/07/2023]
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19
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Bonnamain V, Mathieux E, Thinard R, Thébault P, Nerrière-Daguin V, Lévêque X, Anegon I, Vanhove B, Neveu I, Naveilhan P. Expression of heme oxygenase-1 in neural stem/progenitor cells as a potential mechanism to evade host immune response. Stem Cells 2013; 30:2342-53. [PMID: 22888011 DOI: 10.1002/stem.1199] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Besides their therapeutic benefit as cell source, neural stem/progenitor cells (NSPCs) exhibit immunosuppressive properties of great interest for modulating immune response in the central nervous system. To decipher the mechanisms of NSPC-mediated immunosuppression, activated T cells were exposed to NSPCs isolated from fetal rat brains. Analyses revealed that NSPCs inhibited T-cell proliferation and interferon-gamma production in a dose-dependent manner. A higher proportion of helper T cells (CD4+ T cells) was found in the presence of NSPCs, but analyses of FoxP3 population indicated that T-cell suppression was not secondary to an induction of suppressive regulatory T cells (FoxP3+ CD4+ CD25+). Conversely, induction of the high affinity interleukin-2 (IL-2) receptor (CD25) and the inability of IL-2 to rescue T-cell proliferation suggest that NSPCs display immunosuppressive activity without affecting T-cell activation. Cultures in Transwell chambers or addition of NSPC-conditioned medium to activated T cells indicated that part of the suppressive activity was not contact dependent. We therefore searched for soluble factors that mediate NSPC immunosuppression. We found that NSPCs express several immunosuppressive molecules, but the ability of these cells to inhibit T-cell proliferation was only counteracted by heme oxygenase (HO) inhibitors in association or not with nitric oxide synthase inhibitors. Taken together, our findings highlight a dynamic crosstalk between NSPCs and T lymphocytes and provide the first evidence of an implication of HO-1 in mediating the immunosuppressive effects of the NSPCs.
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20
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Gurgul-Convey E, Hanzelka K, Lenzen S. Is there a role for neuronal nitric oxide synthase (nNOS) in cytokine toxicity to pancreatic beta cells? Nitric Oxide 2012; 27:235-41. [PMID: 22921991 DOI: 10.1016/j.niox.2012.08.075] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 07/17/2012] [Accepted: 08/03/2012] [Indexed: 02/07/2023]
Abstract
Nitric oxide (NO), produced by the action of the inducible NO synthase, plays a crucial role in cytokine toxicity to pancreatic beta cells during type 1 diabetes development. It was the aim of this study to analyze the role of the neuronal NOS (nNOS) in proinflammatory cytokine-mediated beta cell toxicity. Expression of different isoforms of nitric oxide synthase in insulin-secreting INS1E cells and rat islets was analyzed by quantitative real-time PCR and Western blotting. The expression of nNOS in insulin-secreting INS1E cells was similar to that found in rat brain, while two other isoforms, namely the endothelial eNOS and inducible iNOS were not expressed in untreated cells. IL-1β alone or in combination with TNF-α and/or IFNγ induced iNOS but not eNOS expression. In contrast, nNOS expression was strongly decreased by the mixture of the three proinflammatory cytokines (IL-1β, TNF-α and IFNγ) both on the gene and protein level in INS1E cells and rat islet cells. The effects of cytokines on glucose-induced insulin-secretion followed the pattern of nNOS expression reduction and, on the other hand, of the iNOS induction. The data indicate that a low level of nitric oxide originating from the constitutive expression of nNOS in pancreatic beta cells is not deleterious. In particular since proinflammatory cytokines reduce this expression. This nNOS suppression can compensate for NO generation by low concentrations of IL-1β through iNOS induction. Thus, this basal nNOS expression level in pancreatic beta cells represents a protective element against cytokine toxicity.
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Affiliation(s)
- Ewa Gurgul-Convey
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany.
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21
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Yao SY, Natarajan C, Sriram S. nNOS mediated mitochondrial injury in LPS stimulated oligodendrocytes. Mitochondrion 2012; 12:336-44. [DOI: 10.1016/j.mito.2012.01.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 01/03/2012] [Accepted: 01/12/2012] [Indexed: 02/06/2023]
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22
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Wang HH, Hsieh HL, Yang CM. Nitric oxide production by endothelin-1 enhances astrocytic migration via the tyrosine nitration of matrix metalloproteinase-9. J Cell Physiol 2011; 226:2244-56. [PMID: 21660948 DOI: 10.1002/jcp.22560] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The deleterious effects of endothelin-1 (ET-1) in the central nervous system (CNS) include disturbance of water homeostasis and blood-brain barrier (BBB) integrity. In the CNS, ischemic injury elicits ET-1 release from astrocytes, behaving through G-protein coupled ET receptors. These considerations raise the question of whether ET-1 influences cellular functions of astrocytes, the major cell type that provides structural and functional support for neurons. Uncontrolled nitric oxide (NO) production has been implicated in sterile brain insults, neuroinflammation, and neurodegenerative diseases, which involve astrocyte activation and neuronal death. However, the detailed mechanisms of ET-1 action related to NO release on rat brain astrocytes (RBA-1) remain unknown. In this study, we demonstrate that exposure of astrocytes to ET-1 results in the inducible nitric oxide synthase (iNOS) up-regulation, NO production, and matrix metalloproteinase-9 (MMP-9) activation in astrocytes. The data obtained with Western blot, reverse transcription-PCR (RT-PCR), and immunofluorescent staining analyses showed that ET-1-induced iNOS expression and NO production were mediated through an ET(B)-dependent transcriptional activation. Engagement of G(i/o)--and G(q) -coupled ET(B) receptors by ET-1 led to activation of c-Src-dependent phosphoinositide 3-kinase (PI3K)/Akt and p42/p44 mitogen-activated protein kinase (MAPK) and then activated transcription factor nuclear factor-κB (NF-κB). The activated NF-κB was translocated into nucleus and thereby promoted iNOS gene transcription. Ultimately, NO production stimulated by ET-1 enhanced the migration of astrocytes through the tyrosine nitration of MMP-9. Taken together, these results suggested that in astrocytes, activation of NF-κB by ET(B)-dependent c-Src, PI3K/Akt, and p42/p44 MAPK signalings is necessary for ET-1-induced iNOS gene up-regulation.
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Affiliation(s)
- Hui-Hsin Wang
- Department of Pharmacology, Chang Gung University, Tao-Yuan, Taiwan
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23
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Cytokine interactions with adrenal medullary chromaffin cells. Cell Mol Neurobiol 2010; 30:1467-75. [PMID: 21088883 DOI: 10.1007/s10571-010-9593-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Accepted: 09/02/2010] [Indexed: 12/19/2022]
Abstract
It is generally accepted that a bi-directional or reciprocal interaction occurs between the immune and neuroendocrine systems, and that this relationship is important for the appropriate physiological functioning of both systems. Similarly, an imbalance in this relationship may contribute to a number of pathologies, most notably those relating to stress. The aim of this article is to consider the interaction of cytokines with the adrenal medulla, a potentially important player in this relationship. The chromaffin cells of the adrenal medulla release catecholamines and a range of biologically active peptides in response to a wide variety of stress-related signals. A growing body of evidence indicates that this stress response is influenced by, and in turn has influence upon, immune signalling. This brief review will focus primarily on the best-described adrenal medullary active cytokines, namely interferon-α, interleukin-6, interleukin-1α/β and tumour necrosis factor-α. In each case, three key issues will be addressed: the physiologically relevant source of the cytokine; the intracellular signalling events arising from activation of its receptor and finally the cellular consequences of such activation in terms of modulation of gene expression and the secretory output of the chromaffin cells.
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Oliván A, Pérez-Rodríguez R, Roncero C, Arce C, González M, Oset-Gasque M. Plasma membrane and vesicular glutamate transporter expression in chromaffin cells of bovine adrenal medulla. J Neurosci Res 2010; 89:44-57. [DOI: 10.1002/jnr.22529] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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25
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In vitro and in vivo induction and activation of nNOS by LPS in oligodendrocytes. J Neuroimmunol 2010; 229:146-56. [PMID: 20724006 DOI: 10.1016/j.jneuroim.2010.07.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Revised: 07/25/2010] [Accepted: 07/27/2010] [Indexed: 11/20/2022]
Abstract
There are currently four known isoforms of nitric oxide synthase (NOS). Of these, neuronal NOS (nNOS) is known to be present exclusively in neurons, endothelial NOS (eNOS) in vascular endothelium, while the inducible form of NOS (iNOS) is known to be activated in oligodendrocytes, astrocytes and microglia. The fourth isoform, mitochondrial NOS (mtNOS), represents a post-translational modification of nNOS. Using western blotting and real time-PCR, we show induction and activation of nNOS following culture of oligodendrocyte progenitor cells (OPC) with lipopolysaccharide (LPS). Activation of nNOS results in accumulation of peroxynitrite and tyrosine nitration of proteins in oligodendrocytes resulting in reduced cell viability. Injection of LPS in vivo into the corpus callosum of rats leads to the development of extensive demyelination of the white matter tracts. Immunostaining of regions close to the injection site shows the presence of nNOS, but not iNOS, in oligodendrocytes. Neither iNOS nor nNOS was seen in astrocytes in areas of demyelination. These studies suggest that activation of nNOS in oligodendrocytes leads to oligodendrocyte injury resulting in demyelination.
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Litherland GJ, Elias MS, Hui W, Macdonald CD, Catterall JB, Barter MJ, Farren MJ, Jefferson M, Rowan AD. Protein kinase C isoforms zeta and iota mediate collagenase expression and cartilage destruction via STAT3- and ERK-dependent c-fos induction. J Biol Chem 2010; 285:22414-25. [PMID: 20463008 PMCID: PMC2903406 DOI: 10.1074/jbc.m110.120121] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2010] [Revised: 04/30/2010] [Indexed: 12/27/2022] Open
Abstract
The protein kinase C (PKC) signaling pathway is a major regulator of cellular functions and is implicated in pathologies involving extracellular matrix remodeling. Inflammatory joint disease is characterized by excessive extracellular matrix catabolism, and here we assess the role of PKC in the induction of the collagenases, matrix metalloproteinase (MMP)-1 and MMP-13, in human chondrocytes by the potent cytokine stimulus interleukin-1 (IL-1) in combination with oncostatin M (OSM). IL-1 + OSM-stimulated collagenolysis and gelatinase activity were ameliorated by pharmacological PKC inhibition in bovine cartilage, as was collagenase gene induction in human chondrocytes. Small interfering RNA-mediated silencing of PKC gene expression showed that both novel (nPKC delta, nPKC eta) and atypical (aPKC zeta, aPKC iota) isoforms were involved in collagenase induction by IL-1. However, MMP1 and MMP13 induction by IL-1 + OSM was inhibited only by aPKC silencing, suggesting that only atypical isoforms play a significant role in complex inflammatory milieus. Silencing of either aPKC led to diminished IL-1 + OSM-dependent extracellular signal-regulated kinase (ERK) and signal transducer and activator of transcription (STAT) 3 phosphorylation, and c-fos expression. STAT3 gene silencing or ERK pathway inhibition also resulted in loss of IL-1 + OSM-stimulated c-fos and collagenase expression. Silencing of c-fos and c-jun expression was sufficient to abrogate IL-1 + OSM-stimulated collagenase gene induction, and overexpression of both c-fos and c-jun was sufficient to drive transcription from the MMP1 promoter in the absence of a stimulus. Our data identify atypical PKC isozymes as STAT and ERK activators that mediate c-fos and collagenase expression during IL-1 + OSM synergy in human chondrocytes. aPKCs may constitute potential therapeutic targets for inflammatory joint diseases involving increased collagenase expression.
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Affiliation(s)
- Gary J. Litherland
- From the Cell Signalling, Injury and Repair Group, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 4HH, United Kingdom
| | - Martina S. Elias
- From the Cell Signalling, Injury and Repair Group, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 4HH, United Kingdom
| | - Wang Hui
- From the Cell Signalling, Injury and Repair Group, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 4HH, United Kingdom
| | - Christopher D. Macdonald
- From the Cell Signalling, Injury and Repair Group, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 4HH, United Kingdom
| | - Jonathon B. Catterall
- From the Cell Signalling, Injury and Repair Group, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 4HH, United Kingdom
| | - Matt J. Barter
- From the Cell Signalling, Injury and Repair Group, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 4HH, United Kingdom
| | - Matthew J. Farren
- From the Cell Signalling, Injury and Repair Group, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 4HH, United Kingdom
| | - Matthew Jefferson
- From the Cell Signalling, Injury and Repair Group, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 4HH, United Kingdom
| | - Andrew D. Rowan
- From the Cell Signalling, Injury and Repair Group, Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 4HH, United Kingdom
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Riediger T, Cordani C, Potes CS, Lutz TA. Involvement of nitric oxide in lipopolysaccharide induced anorexia. Pharmacol Biochem Behav 2010; 97:112-20. [PMID: 20430051 DOI: 10.1016/j.pbb.2010.04.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Revised: 04/01/2010] [Accepted: 04/15/2010] [Indexed: 12/21/2022]
Abstract
Treatment with the bacterial endotoxin lipopolysaccharide (LPS) is a commonly used model to induce disease-related anorexia. Following LPS treatment inducible nitric oxide synthase (iNOS) is expressed in the hypothalamic arcuate nucleus (ARC), where nitric oxide (NO) inhibits orexigenic neurons. Intracellular STAT signaling is triggered by inflammatory stimuli and has been linked to the transcriptional regulation of iNOS. We evaluated whether pharmacological blockade of iNOS by the specific inhibitor 1400W attenuates LPS-induced anorexia. Furthermore, we hypothesized that the tolerance to the anorectic effect occurring after repeated LPS treatment is paralleled by a blunted STAT3 phosphorylation in the ARC. Rats treated with a subcutaneous injection of 1400W (10 mg/kg) showed an attenuated anorectic LPS response relative to control rats receiving only LPS (100 µg/kg; i.p.). Similarly, iNOS blockade attenuated LPS-induced adipsia, hyperthermia, inactivity and the concomitant drop in energy expenditure. While single LPS treatment increased STAT3 phosphorylation in the ARC, rats treated repeatedly with LPS showed no anorectic response and also no STAT3 phosphorylation in the ARC after the second and third LPS injections, respectively. Hence, pSTAT3 signaling in the ARC might be part of the intracellular cascades translating pro-inflammatory stimuli into suppression of food intake. The current findings substantiate a role of iNOS dependent NO formation in disease-related anorexia.
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Affiliation(s)
- Thomas Riediger
- Institute of Veterinary Physiology, University of Zurich, Zurich, Switzerland.
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28
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Ait-Ali D, Stroth N, Sen JM, Eiden LE. PACAP-cytokine interactions govern adrenal neuropeptide biosynthesis after systemic administration of LPS. Neuropharmacology 2009; 58:208-14. [PMID: 19647754 DOI: 10.1016/j.neuropharm.2009.07.034] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2009] [Revised: 07/10/2009] [Accepted: 07/27/2009] [Indexed: 01/08/2023]
Abstract
We have examined induction of neuropeptide expression in adrenal medulla after treatment of mice with lipopolysaccharide (LPS), a model for septic shock, which activates both immune and stress responses in vivo. Messenger RNAs encoding vasoactive intestinal polypeptide (VIP) and galanin, both modulators of steroidogenesis in neighboring adrenal cortex, are up-regulated at 24 h (eight-fold for VIP and two-fold for galanin) after LPS injection, and remain elevated for the following 24 h. Up-regulation of VIP and galanin by LPS is abrogated in pituitary adenylate cyclase-activating polypeptide (PACAP)-deficient mice, suggesting an interaction between LPS, or LPS-induced cytokines, and PACAP released in adrenal medulla from the splanchnic nerve. Treatment of cultured chromaffin cells with 100 nM PACAP and 10 nM tumor necrosis factor-alpha (TNF-alpha), a cytokine whose production is elevated by LPS, results in long-term synergistic up-regulation of VIP and galanin mRNA. PACAP blocks the earlier induction by TNF-alpha of mRNA encoding inhibitor of NF-kappaB alpha (I kappaB alpha), normally a negative autoregulator of TNF-alpha signaling through nuclear factor-kappaB (NF-kappaB), without affecting the induction of TNF-alpha-induced protein 3 (TNFAIP3), another NF-kappaB-dependent gene induced by TNF-alpha in chromaffin cells. By acting downstream of NF-kappaB to inhibit I kappaB alpha gene induction by TNF-alpha, PACAP may block I kappaB alpha-dependent negative autoregulation of TNF-alpha signaling through NF-kappaB, prolonging TNF-alpha-dependent signaling to neuropeptide-encoding genes in chromaffin cells. This mechanism may also underlie PACAP-dependent neuropeptide gene induction by LPS in vivo.
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Affiliation(s)
- Djida Ait-Ali
- Section on Molecular Neuroscience, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, Bethesda, MD 20892, USA
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29
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Erratum. J Neurochem 2009. [DOI: 10.1111/j.1471-4159.2009.05923.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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