251
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BRD4 has dual effects on the HMGB1 and NF-κB signalling pathways and is a potential therapeutic target for osteoarthritis. Biochim Biophys Acta Mol Basis Dis 2017; 1863:3001-3015. [DOI: 10.1016/j.bbadis.2017.08.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 07/28/2017] [Accepted: 08/16/2017] [Indexed: 01/11/2023]
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252
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Yu Y, Wang L, Delguste F, Durand A, Guilbaud A, Rousselin C, Schmidt AM, Tessier F, Boulanger E, Neviere R. Advanced glycation end products receptor RAGE controls myocardial dysfunction and oxidative stress in high-fat fed mice by sustaining mitochondrial dynamics and autophagy-lysosome pathway. Free Radic Biol Med 2017; 112:397-410. [PMID: 28826719 DOI: 10.1016/j.freeradbiomed.2017.08.012] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 08/05/2017] [Accepted: 08/17/2017] [Indexed: 12/18/2022]
Abstract
Oxidative stress and mitochondrial dysfunction are recognized as major contributors of cardiovascular damage in diabetes and high fat diet (HFD) fed mice. Blockade of receptor for advanced glycation end products (RAGE) attenuates vascular oxidative stress and development of atherosclerosis. We tested whether HFD-induced myocardial dysfunction would be reversed in RAGE deficiency mice, in association with changes in oxidative stress damage, mitochondrial respiration, mitochondrial fission and autophagy-lysosomal pathway. Cardiac antioxidant capacity was upregulated in RAGE-/- mice under normal diet as evidenced by increased superoxide dismutase and sirtuin mRNA expressions. Mitochondrial fragmentation and mitochondrial fission protein Drp1 and Fis1 expressions were increased in RAGE-/- mice. Autophagy-related protein expressions and cathepsin-L activity were increased in RAGE-/- mice suggesting sustained autophagy-lysosomal flux. HFD induced mitochondrial respiration defects, cardiac contractile dysfunction, disrupted mitochondrial dynamics and autophagy inhibition, which were partially prevented in RAGE-/- mice. Our results suggest that cardioprotection against HFD in RAGE-/- mice include reactivation of autophagy, as inhibition of autophagic flux by chloroquine fully abrogated beneficial myocardial effects and its stimulation by rapamycin improved myocardial function in HFD wild type mice. As mitochondrial fission is necessary to mitophagy, increased fragmentation of mitochondrial network in HFD RAGE-/- mice may have facilitated removal of damaged mitochondria leading to better mitochondrial quality control. In conclusion, modulation of RAGE pathway may improve mitochondrial damage and myocardial dysfunction in HFD mice. Attenuation of cardiac oxidative stress and maintenance of healthy mitochondria population ensuring adequate energy supply may be involved in myocardial protection against HFD.
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Affiliation(s)
- Yichi Yu
- INSERM U995, LIRIC /Team "Glycation: from inflammation to aging", Lille University, France; School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Lei Wang
- INSERM U995, LIRIC /Team "Glycation: from inflammation to aging", Lille University, France; School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Florian Delguste
- INSERM U995, LIRIC /Team "Glycation: from inflammation to aging", Lille University, France
| | - Arthur Durand
- INSERM U995, LIRIC /Team "Glycation: from inflammation to aging", Lille University, France; University Hospital CHU of Lille, F-59000 Lille, France
| | - Axel Guilbaud
- INSERM U995, LIRIC /Team "Glycation: from inflammation to aging", Lille University, France
| | - Clementine Rousselin
- INSERM U995, LIRIC /Team "Glycation: from inflammation to aging", Lille University, France; University Hospital CHU of Lille, F-59000 Lille, France
| | - Ann Marie Schmidt
- Diabetes Research Center, Department of Medicine, NYU Langone Medical Center, New York, NY, USA
| | - Frédéric Tessier
- INSERM U995, LIRIC /Team "Glycation: from inflammation to aging", Lille University, France
| | - Eric Boulanger
- INSERM U995, LIRIC /Team "Glycation: from inflammation to aging", Lille University, France; University Hospital CHU of Lille, F-59000 Lille, France
| | - Remi Neviere
- INSERM U995, LIRIC /Team "Glycation: from inflammation to aging", Lille University, France; University Hospital CHU of Martinique, University of Antilles, Fort de France F-97200, France.
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253
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sRAGE alleviates neutrophilic asthma by blocking HMGB1/RAGE signalling in airway dendritic cells. Sci Rep 2017; 7:14268. [PMID: 29079726 PMCID: PMC5660212 DOI: 10.1038/s41598-017-14667-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 10/16/2017] [Indexed: 12/13/2022] Open
Abstract
Receptor for advanced glycation end products (RAGE) plays a role in inflammatory reactions. The soluble form of RAGE (sRAGE) acts as a decoy to inhibit interactions of RAGE with advanced glycation end products such as High mobility group box 1 (HMGB1). We have demonstrated that HMGB1 directs Th17 skewing by regulating dendritic cell (DC) functions in a previous study. However, the protective effects of HMGB1 blockade with sRAGE in the development of neutrophilic asthma remain unclear. Here, we showed that allergen challenge decreased expression of sRAGE in a murine model of neutrophilic asthma, correlating well with neutrophil counts and interleukin (IL)-17 production. When HMGB1 signalling was blocked by intratracheal administration of sRAGE before sensitisation, HMGB1 expression, neutrophilic inflammation, and Th17-type responses were reduced significantly. Anti-asthma effects of sRAGE were achieved by inhibition of RAGE and IL-23 expression in airway CD11c+ antigen-presenting cells. Finally, we showed that sRAGE inhibited Th17 polarisation induced by recombinant HMGB1 (rHMGB1)-activated dendritic cells (DCs) in vitro. Adoptive transfer of rHMGB1-activated DCs was sufficient to restore airway inflammation, whereas transfer of rHMGB1 plus sRAGE-activated DCs significantly reduced neutrophilic inflammation. Thus, sRAGE prevents Th17-mediated airway inflammation in neutrophilic asthma at least partly by blocking HMGB1/RAGE signalling in DCs.
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254
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Syed DN, Aljohani A, Waseem D, Mukhtar H. Ousting RAGE in melanoma: A viable therapeutic target? Semin Cancer Biol 2017; 49:20-28. [PMID: 29079306 DOI: 10.1016/j.semcancer.2017.10.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 09/28/2017] [Accepted: 10/23/2017] [Indexed: 01/11/2023]
Abstract
Melanoma remains an important health concern, given the steady increase in incidence and acquisition of resistance to systemic therapies. The receptor for advanced glycation end products (RAGE) initially identified for its binding to advanced glycation end products was subsequently acknowledged as a pattern recognition receptor given its ability to recognize similar structural elements within numerous ligands. Recent studies have elucidated a plausible role of RAGE in melanoma progression through modulation of inflammatory, proliferative and invasive cellular responses. Several of its ligands including the S100 proteins and HMGB1 are being investigated for their involvement in melanoma metastasis and as potential biomarkers of the disease. Targeting RAGE signaling represents a viable therapeutic strategy which remains underexplored in cutaneous malignancies. Here we have summarized current knowledge on the functionality of RAGE with special focus on specific ligands enumerated in various in vitro and in vivo melanoma models.
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Affiliation(s)
- Deeba N Syed
- Department of Dermatology, University of Wisconsin-Madison, United States.
| | - Ahmed Aljohani
- School of Medicine and Public Health, Endocrinology and Reproductive Physiology Graduate Training Program, University of Wisconsin-Madison, Madison WI 53706, United States; King Saud bin Abdulaziz University for Health Sciences, Riyadh 11481, Saudi Arabia
| | - Durdana Waseem
- Department of Dermatology, University of Wisconsin-Madison, United States
| | - Hasan Mukhtar
- Department of Dermatology, University of Wisconsin-Madison, United States
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255
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Álvarez K, Vasquez G. Damage-associated molecular patterns and their role as initiators of inflammatory and auto-immune signals in systemic lupus erythematosus. Int Rev Immunol 2017; 36:259-270. [DOI: 10.1080/08830185.2017.1365146] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Karen Álvarez
- Grupo de Inmunología Celular e Inmunogenética, Universidad de Antioquia, carrera 53 numero 61-30, Medellin, Colombia
| | - Gloria Vasquez
- Grupo de Inmunología Celular e Inmunogenética, Universidad de Antioquia, carrera 53 numero 61-30, Medellin, Colombia
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256
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Matsumoto H, Matsumoto N, Shimazaki J, Nakagawa J, Imamura Y, Yamakawa K, Yamada T, Ikeda M, Hiraike H, Ogura H, Shimazu T. Therapeutic Effectiveness of Anti-RAGE Antibody Administration in a Rat Model of Crush Injury. Sci Rep 2017; 7:12255. [PMID: 28947744 PMCID: PMC5613014 DOI: 10.1038/s41598-017-12065-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Accepted: 09/04/2017] [Indexed: 11/09/2022] Open
Abstract
Crush injury patients often have systemic inflammatory response syndrome that leads to multiple organ failure. Receptor for advanced glycation endproducts (RAGE) functions as a pattern recognition receptor that regulates inflammation. We evaluated the effects of anti-RAGE antibody in a crush injury model. Pressure was applied to both hindlimbs of rats for 6 h by 3.0-kg blocks and then released. Animals were randomly divided into the sham (RAGE-Sh) group, crush (RAGE-Ctrl) group or anti-RAGE antibody-treated crush (RAGE-Tx) group. Samples were collected at 3, 6 and 24 h after releasing pressure. In the RAGE-Ctrl group, fluorescent immunostaining in the lung showed upregulated RAGE expression at 3 h. The serum soluble RAGE (sRAGE) level, which reflects the amount of RAGE expression in systemic tissue, increased at 6 h. Serum interleukin 6 (IL-6; systemic inflammation marker) increased immediately at 3 h. Histological analysis revealed lung injury at 6 and 24 h. Administration of anti-RAGE antibody before releasing compression inhibited upregulated RAGE expression in the lung alveoli, suppressed RAGE-associated mediators sRAGE and IL6, attenuated the lung damage and improved the 7-day survival rate. Collectively, our results indicated that the use of anti-RAGE antibody before releasing compression is associated with a favourable prognosis following crush injury.
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Affiliation(s)
- Hisatake Matsumoto
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, 2-15 Yamadaoka Suita, Osaka, 565-0871, Japan.
| | - Naoya Matsumoto
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, 2-15 Yamadaoka Suita, Osaka, 565-0871, Japan
| | - Junya Shimazaki
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, 2-15 Yamadaoka Suita, Osaka, 565-0871, Japan
| | - Junichiro Nakagawa
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, 2-15 Yamadaoka Suita, Osaka, 565-0871, Japan
| | - Yukio Imamura
- Laboratory of Nano-Bio Probes, RIKEN Quantitative Biology Center, 6-2-3 Furuedai, Suita, Osaka, 565-0874, Japan
| | - Kazuma Yamakawa
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, 2-15 Yamadaoka Suita, Osaka, 565-0871, Japan
| | - Tomoki Yamada
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, 2-15 Yamadaoka Suita, Osaka, 565-0871, Japan
| | - Mitsunori Ikeda
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, 2-15 Yamadaoka Suita, Osaka, 565-0871, Japan
| | - Hiroko Hiraike
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, 2-15 Yamadaoka Suita, Osaka, 565-0871, Japan
| | - Hiroshi Ogura
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, 2-15 Yamadaoka Suita, Osaka, 565-0871, Japan
| | - Takeshi Shimazu
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, 2-15 Yamadaoka Suita, Osaka, 565-0871, Japan
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257
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PrabhuDas MR, Baldwin CL, Bollyky PL, Bowdish DME, Drickamer K, Febbraio M, Herz J, Kobzik L, Krieger M, Loike J, McVicker B, Means TK, Moestrup SK, Post SR, Sawamura T, Silverstein S, Speth RC, Telfer JC, Thiele GM, Wang XY, Wright SD, El Khoury J. A Consensus Definitive Classification of Scavenger Receptors and Their Roles in Health and Disease. THE JOURNAL OF IMMUNOLOGY 2017; 198:3775-3789. [PMID: 28483986 DOI: 10.4049/jimmunol.1700373] [Citation(s) in RCA: 217] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 03/13/2017] [Indexed: 02/07/2023]
Abstract
Scavenger receptors constitute a large family of proteins that are structurally diverse and participate in a wide range of biological functions. These receptors are expressed predominantly by myeloid cells and recognize a diverse variety of ligands including endogenous and modified host-derived molecules and microbial pathogens. There are currently eight classes of scavenger receptors, many of which have multiple names, leading to inconsistencies and confusion in the literature. To address this problem, a workshop was organized by the United States National Institute of Allergy and Infectious Diseases, National Institutes of Health, to help develop a clear definition of scavenger receptors and a standardized nomenclature based on that definition. Fifteen experts in the scavenger receptor field attended the workshop and, after extensive discussion, reached a consensus regarding the definition of scavenger receptors and a proposed scavenger receptor nomenclature. Scavenger receptors were defined as cell surface receptors that typically bind multiple ligands and promote the removal of nonself or altered-self targets. They often function by mechanisms that include endocytosis, phagocytosis, adhesion, and signaling that ultimately lead to the elimination of degraded or harmful substances. Based on this definition, nomenclature and classification of these receptors into 10 classes were proposed. This classification was discussed at three national meetings and input from participants at these meetings was requested. The following manuscript is a consensus statement that combines the recommendations of the initial workshop and incorporates the input received from the participants at the three national meetings.
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Affiliation(s)
- Mercy R PrabhuDas
- Division of Allergy, Immunology and Transplantation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852;
| | - Cynthia L Baldwin
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, MA 01003.,Program in Molecular and Cellular Biology, University of Massachusetts, Amherst, MA 01003
| | - Paul L Bollyky
- Department of Medicine, Stanford University, Stanford, CA 94305
| | - Dawn M E Bowdish
- Department of Pathology and Molecular Medicine, McMaster Immunology Research Centre, M.G. DeGroote Institute of Infectious Disease Research, McMaster University, Hamilton, Ontario L8S 4K1, Canada
| | - Kurt Drickamer
- Department of Life Sciences, Imperial College, London SW7 2AZ, United Kingdom
| | - Maria Febbraio
- Department of Dentistry, Katz Group Centre for Pharmacy and Health Research, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - Joachim Herz
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390.,Department of Neuroscience, University of Texas Southwestern Medical Center, Dallas, TX 75390.,Department of Neurology and Neurotherapeutics, University of Texas Southwestern Medical Center, Dallas, TX 75390.,Center for Translational Neurodegeneration Research, University of Texas Southwestern Medical Center, Dallas, TX 75390.,Peter O'Donnell Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Lester Kobzik
- Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115
| | - Monty Krieger
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - John Loike
- Department of Physiology and Cellular Biophysics, Columbia University, New York, NY 10032
| | - Benita McVicker
- University of Nebraska Medical Center, Omaha VA Nebraska-Western Iowa Health Care System, Omaha, NE 68105
| | - Terry K Means
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129
| | - Soren K Moestrup
- Department of Biomedicine, University of Aarhus, 8000 Aarhus C, Denmark
| | - Steven R Post
- Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR 72205
| | - Tatsuya Sawamura
- Department of Physiology, Research Institute, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - Samuel Silverstein
- Department of Physiology and Cellular Biophysics, Columbia University, New York, NY 10032
| | - Robert C Speth
- Department of Pharmaceutical Sciences, Nova Southeastern University, Fort Lauderdale, FL 33328
| | - Janice C Telfer
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, MA 01003
| | - Geoffrey M Thiele
- Division of Rheumatology, Department of Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68105
| | - Xiang-Yang Wang
- Department of Human and Molecular Genetics, Institute of Molecular Medicine, Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Samuel D Wright
- Cardiovascular Therapeutics, CSL Behring, King of Prussia, PA 19406; and
| | - Joseph El Khoury
- Infectious Disease Division, Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129
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258
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Identification of the S100 fused-type protein hornerin as a regulator of tumor vascularity. Nat Commun 2017; 8:552. [PMID: 28916756 PMCID: PMC5601918 DOI: 10.1038/s41467-017-00488-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 07/04/2017] [Indexed: 02/03/2023] Open
Abstract
Sustained angiogenesis is essential for the development of solid tumors and metastatic disease. Disruption of signaling pathways that govern tumor vascularity provide a potential avenue to thwart cancer progression. Through phage display-based functional proteomics, immunohistochemical analysis of human pancreatic ductal carcinoma (PDAC) specimens, and in vitro validation, we reveal that hornerin, an S100 fused-type protein, is highly expressed on pancreatic tumor endothelium in a vascular endothelial growth factor (VEGF)-independent manner. Murine-specific hornerin knockdown in PDAC xenografts results in tumor vessels with decreased radii and tortuosity. Hornerin knockdown tumors have significantly reduced leakiness, increased oxygenation, and greater apoptosis. Additionally, these tumors show a significant reduction in growth, a response that is further heightened when therapeutic inhibition of VEGF receptor 2 (VEGFR2) is utilized in combination with hornerin knockdown. These results indicate that hornerin is highly expressed in pancreatic tumor endothelium and alters tumor vessel parameters through a VEGF-independent mechanism.Angiogenesis is essential for solid tumor progression. Here, the authors interrogate the proteome of pancreatic cancer endothelium via phage display and identify hornerin as a critical protein whose expression is essential to maintain the pancreatic cancer vasculature through a VEGF-independent mechanism.
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259
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Heilmann RM, Allenspach K. Pattern-recognition receptors: signaling pathways and dysregulation in canine chronic enteropathies—brief review. J Vet Diagn Invest 2017; 29:781-787. [DOI: 10.1177/1040638717728545] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Pattern-recognition receptors (PRRs) are expressed by innate immune cells and recognize pathogen-associated molecular patterns (PAMPs) as well as endogenous damage-associated molecular pattern (DAMP) molecules. With a large potential for synergism or convergence between their signaling pathways, PRRs orchestrate a complex interplay of cellular mediators and transcription factors, and thus play a central role in homeostasis and host defense. Aberrant activation of PRR signaling, mutations of the receptors and/or their downstream signaling molecules, and/or DAMP/PAMP complex–mediated receptor signaling can potentially lead to chronic auto-inflammatory diseases or development of cancer. PRR signaling pathways appear to also present an interesting new avenue for the modulation of inflammatory responses and to serve as potential novel therapeutic targets. Evidence for a dysregulation of the PRR toll-like receptor (TLR)2, TLR4, TLR5, and TLR9, nucleotide-binding oligomerization domain–containing protein (NOD)2, and the receptor of advanced glycation end products (RAGE) exists in dogs with chronic enteropathies. We describe the TLR, NOD2, and RAGE signaling pathways and evaluate the current veterinary literature—in comparison to human medicine—to determine the role of TLRs, NOD2, and RAGE in canine chronic enteropathies.
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Affiliation(s)
- Romy M. Heilmann
- Department of Small Animal Medicine, College of Veterinary Medicine, University of Leipzig, Leipzig, Saxony, Germany (Heilmann)
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA (Allenspach)
| | - Karin Allenspach
- Department of Small Animal Medicine, College of Veterinary Medicine, University of Leipzig, Leipzig, Saxony, Germany (Heilmann)
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA (Allenspach)
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260
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Wang H, Mei X, Cao Y, Liu C, Zhao Z, Guo Z, Bi Y, Shen Z, Yuan Y, Guo Y, Song C, Bai L, Wang Y, Yu D. HMGB1/Advanced Glycation End Products (RAGE) does not aggravate inflammation but promote endogenous neural stem cells differentiation in spinal cord injury. Sci Rep 2017; 7:10332. [PMID: 28871209 PMCID: PMC5583351 DOI: 10.1038/s41598-017-10611-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 08/10/2017] [Indexed: 12/31/2022] Open
Abstract
Receptor for advanced glycation end products (RAGE) signaling is involved in a series of cell functions after spinal cord injury (SCI). Our study aimed to elucidate the effects of RAGE signaling on the neuronal recovery after SCI. In vivo, rats were subjected to SCI with or without anti-RAGE antibodies micro-injected into the lesion epicenter. We detected Nestin/RAGE, SOX-2/RAGE and Nestin/MAP-2 after SCI by Western blot or immunofluorescence (IF). We found that neural stem cells (NSCs) co-expressed with RAGE were significantly activated after SCI, while stem cell markers Nestin and SOX-2 were reduced by RAGE blockade. We found that RAGE inhibition reduced nestin-positive NSCs expressing MAP-2, a mature neuron marker. RAGE blockade does not improve neurobehavior Basso, Beattie and Bresnahan (BBB) scores; however, it damaged survival of ventral neurons via Nissl staining. Through in vitro study, we found that recombinant HMGB1 administration does not lead to increased cytokines of TNF-α and IL-1β, while anti-RAGE treatment reduced cytokines of TNF-α and IL-1β induced by LPS via ELISA. Meanwhile, HMGB1 increased MAP-2 expression, which was blocked after anti-RAGE treatment. Hence, HMGB1/RAGE does not exacerbate neuronal inflammation but plays a role in promoting NSCs differentiating into mature neurons in the pathological process of SCI.
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Affiliation(s)
- Hongyu Wang
- Department of Orthopedic, First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China
| | - Xifan Mei
- Department of Orthopedic, First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China.
| | - Yang Cao
- Department of Orthopedic, First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China
| | - Chang Liu
- Department of Endocrinology, First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China
| | - Ziming Zhao
- Department of Stomatology, Second Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China
| | - Zhanpeng Guo
- Department of Orthopedic, First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China
| | - Yunlong Bi
- Department of Orthopedic, First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China
| | - Zhaoliang Shen
- Department of Orthopedics, Second Hospital of Jinzhou, Jinzhou City, PR China
| | - Yajiang Yuan
- Department of Orthopedic, First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China
| | - Yue Guo
- Department of Orthopedic, First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China
| | - Cangwei Song
- Department of Orthopedic, First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China
| | - Liangjie Bai
- Department of Orthopedics, China Medical University, Shenyang City, PR China
| | - Yansong Wang
- Department of Orthopedic, First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China
| | - Deshui Yu
- Department of Orthopedic, First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, PR China
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261
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Lee TW, Kao YH, Lee TI, Chen YJ. ADAM10 modulates calcitriol-regulated RAGE in cardiomyocytes. Eur J Clin Invest 2017; 47:675-683. [PMID: 28722189 DOI: 10.1111/eci.12789] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 07/15/2017] [Indexed: 12/28/2022]
Abstract
BACKGROUND Receptor for advanced glycation end products (RAGE) signalling plays a critical role in the pathogenesis of cardiovascular disease. Calcitriol modulates cardiac RAGE expression. This study explored the mechanisms underlying the effect of calcitriol on RAGE and soluble RAGE (sRAGE) expression in cardiomyocytes. MATERIALS AND METHODS Western blot, ELISA, fluorometric assay and PCR analyses were used to evaluate the RAGE, sRAGE, endogenous secretory RAGE (esRAGE), Jun N-terminal kinase (JNK), and a disintegrin and metalloprotease 10 (ADAM10) expression and enzyme activity in HL-1 atrial myocytes without and with calcitriol (10 and 100 nM), nuclear factor-κB (NF-κB) inhibitor (50 μg/mL), or ADAM10 inhibitor (5 μM) incubation for 48 h. RESULTS Calcitriol (10 nM) significantly reduced RAGE protein expression and increased sRAGE concentrations in HL-1 cardiomyocytes compared with control cells. These changes were associated with increased protein expression and enzyme activity of ADAM10 and higher mRNA expression of esRAGE. In the presence of ADAM10 inhibitor, however, the suppressive effect of calcitriol on RAGE was diminished. Methylglyoxal (500 μM for 10 min)-mediated JNK phosphorylation was attenuated in the presence of calcitriol (10 nM). Moreover, control and NF-κB inhibitor-treated HL-1 cells had similar RAGE and sRAGE expression, suggesting that calcitriol-mediated RAGE modulation was independent of NF-κB signalling. CONCLUSIONS We showed that RAGE downregulation and increased sRAGE production by calcitriol were mediated through ADAM10 activation in cardiomyocytes. The results suggest that calcitriol has therapeutic potential in treating RAGE-mediated cardiovascular complications.
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Affiliation(s)
- Ting-Wei Lee
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Division of Endocrinology and Metabolism, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Yu-Hsun Kao
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Department of Medical Education and Research, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Ting-I Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.,Department of General Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yi-Jen Chen
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Division of Cardiovascular Medicine, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
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262
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Gasparotto J, Ribeiro CT, Bortolin RC, Somensi N, Rabelo TK, Kunzler A, Souza NC, Pasquali MADB, Moreira JCF, Gelain DP. Targeted inhibition of RAGE in substantia nigra of rats blocks 6-OHDA-induced dopaminergic denervation. Sci Rep 2017; 7:8795. [PMID: 28821831 PMCID: PMC5562811 DOI: 10.1038/s41598-017-09257-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 07/19/2017] [Indexed: 11/18/2022] Open
Abstract
The receptor for advanced glycation endproducts (RAGE) is a pattern-recognition receptor associated with inflammation in most cell types. RAGE up-regulates the expression of proinflammatory mediators and its own expression via activation of NF-kB. Recent works have proposed a role for RAGE in Parkinson's disease (PD). In this study, we used the multimodal blocker of RAGE FPS-ZM1, which has become available recently, to selectively inhibit RAGE in the substantia nigra (SN) of rats intracranially injected with 6-hydroxydopamine (6-OHDA). FPS-ZM1 (40 μg per rat), injected concomitantly with 6-OHDA (10 μg per rat) into the SN, inhibited the increase in RAGE, activation of ERK1/2, Src and nuclear translocation of NF-kB p65 subunit in the SN. RAGE inhibition blocked glial fibrillary acidic protein and Iba-1 upregulation as well as associated astrocyte and microglia activation. Circulating cytokines in serum and CSF were also decreased by FPS-ZM1 injection. The loss of tyrosine hydroxylase and NeuN-positive neurons was significantly inhibited by RAGE blocking. Finally, FPS-ZM1 attenuated locomotory and exploratory deficits induced by 6-OHDA. Our results demonstrate that RAGE is an essential component in the neuroinflammation and dopaminergic denervation induced by 6-OHDA in the SN. Selective inhibition of RAGE may offer perspectives for therapeutic approaches.
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Affiliation(s)
- Juciano Gasparotto
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
| | - Camila Tiefensee Ribeiro
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Rafael Calixto Bortolin
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Nauana Somensi
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Thallita Kelly Rabelo
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Alice Kunzler
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Natália Cabral Souza
- Instituto de Medicina Tropical, Departamento de Bioquímica, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Matheus Augusto de Bittencourt Pasquali
- Unidade Acadêmica de Engenharia de Alimentos, Centro de Tecnologia e Recursos Naturais, Universidade Federal de Campina Grande - UFCG, Campina Grande, Paraíba, Brazil
| | - José Claudio Fonseca Moreira
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Daniel Pens Gelain
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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Abstract
The receptor for advanced glycation end-products (RAGE) is involved in inflammatory response during acute respiratory distress syndrome (ARDS). Growing body of evidence support strategies of RAGE inhibition in experimental lung injury, but its modalities and effects remain underinvestigated. Anesthetised C57BL/6JRj mice were divided in four groups; three of them underwent orotracheal instillation of acid and were treated with anti-RAGE monoclonal antibody (mAb) or recombinant soluble RAGE (sRAGE), acting as a decoy receptor. The fourth group served as a control. Lung injury was assessed by the analysis of blood gases, alveolar permeability, histology, AFC, and cytokines. Lung expression and distribution epithelial channels ENaC, Na,K-ATPase, and aquaporin (AQP)−5 were assessed. Treatment with either anti-RAGE mAb or sRAGE improved lung injury, arterial oxygenation and decreased alveolar inflammation in acid-injured animals. Anti-RAGE therapies were associated with restored AFC and increased lung expression of AQP-5 in alveolar cell. Blocking RAGE had potential therapeutic effects in a translational mouse model of ARDS, possibly through a decrease in alveolar type 1 epithelial cell injury as shown by restored AFC and lung AQP-5 expression. Further mechanistic studies are warranted to describe intracellular pathways that may control such effects of RAGE on lung epithelial injury and repair.
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264
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A Review of the Molecular Mechanisms Underlying the Development and Progression of Cardiac Remodeling. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:3920195. [PMID: 28751931 PMCID: PMC5511646 DOI: 10.1155/2017/3920195] [Citation(s) in RCA: 256] [Impact Index Per Article: 36.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 05/30/2017] [Indexed: 02/07/2023]
Abstract
Pathological molecular mechanisms involved in myocardial remodeling contribute to alter the existing structure of the heart, leading to cardiac dysfunction. Among the complex signaling network that characterizes myocardial remodeling, the distinct processes are myocyte loss, cardiac hypertrophy, alteration of extracellular matrix homeostasis, fibrosis, defective autophagy, metabolic abnormalities, and mitochondrial dysfunction. Several pathophysiological stimuli, such as pressure and volume overload, trigger the remodeling cascade, a process that initially confers protection to the heart as a compensatory mechanism. Yet chronic inflammation after myocardial infarction also leads to cardiac remodeling that, when prolonged, leads to heart failure progression. Here, we review the molecular pathways involved in cardiac remodeling, with particular emphasis on those associated with myocardial infarction. A better understanding of cell signaling involved in cardiac remodeling may support the development of new therapeutic strategies towards the treatment of heart failure and reduction of cardiac complications. We will also discuss data derived from gene therapy approaches for modulating key mediators of cardiac remodeling.
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265
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Abstract
Spinal cord injury (SCI) is a complex disease process that involves both primary and secondary mechanisms of injury and can leave patients with devastating functional impairment as well as psychological debilitation. While no curative treatment is available for spinal cord injury, current therapeutic approaches focus on reducing the secondary injury that follows SCI. Hyperbaric oxygen (HBO) therapy has shown promising neuroprotective effects in several experimental studies, but the limited number of clinical reports have shown mixed findings. This review will provide an overview of the potential mechanisms by which HBO therapy may exert neuroprotection, provide a summary of the clinical application of HBO therapy in patients with SCI, and discuss avenues for future studies.
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Affiliation(s)
| | - Jason H Huang
- Texas A&M College of Medicine, Temple, Texas, USA.,Department of Neurosurgery, Baylor Scott & White Healthcare, Temple, Texas, USA
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266
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Uhle F, Weiterer S, Siegler BH, Brenner T, Lichtenstern C, Weigand MA. Advanced glycation endproducts induce self- and cross-tolerance in monocytes. Inflamm Res 2017; 66:961-968. [DOI: 10.1007/s00011-017-1076-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 06/24/2017] [Indexed: 01/09/2023] Open
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267
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Xie Y, Yu N, Chen Y, Zhang K, Ma HY, Di Q. HMGB1 regulates P-glycoprotein expression in status epilepticus rat brains via the RAGE/NF-κB signaling pathway. Mol Med Rep 2017. [PMID: 28627626 PMCID: PMC5562060 DOI: 10.3892/mmr.2017.6772] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Overexpression of P-glycoprotein (P-gp) in the brain is an important mechanism involved in drug-resistant epilepsy (DRE). High-mobility group box 1 (HMGB1), an inflammatory cytokine, significantly increases following seizures and may be involved in upregulation of P-gp. However, the underlying mechanisms remain elusive. The aim of the present study was to evaluate the role of HMGB1 and its downstream signaling components, receptor for advanced glycation end-product (RAGE) and nuclear factor-κB (NF-κB), on P-gp expression in rat brains during status epilepticus (SE). Small interfering RNA (siRNA) was administered to rats prior to induction of SE by pilocarpine, to block transcription of the genes encoding HMGB1 and RAGE, respectively. An inhibitor of NF-κB, pyrrolidinedithiocarbamic acid (PDTC), was utilized to inhibit activation of NF-κB. The expression levels of HMGB1, RAGE, phosphorylated-NF-κB p65 (p-p65) and P-gp were detected by western blotting. The relative mRNA expression levels of the genes encoding these proteins were measured using reverse transcription-quantitative polymerase chain reaction and the cellular localization of the proteins was determined by immunofluorescence. Pre-treatment with HMGB1 siRNA reduced the expression levels of RAGE, p-p65 and P-gp. PDTC reduced the expression levels of P-gp. These findings suggested that overexpression of P-gp during seizures may be regulated by HMGB1 via the RAGE/NF-κB signaling pathway, and may be a novel target for treating DRE.
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Affiliation(s)
- Yuan Xie
- Department of Neurology, Nanjing Brain Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Nian Yu
- Department of Neurology, Nanjing Brain Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Yan Chen
- Department of Neurology, Nanjing Brain Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Kang Zhang
- Department of Neurology, Nanjing Brain Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Hai-Yan Ma
- Department of Neurology, Nanjing Brain Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Qing Di
- Department of Neurology, Nanjing Brain Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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268
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Khan MI, Rath S, Adhami VM, Mukhtar H. Hypoxia driven glycation: Mechanisms and therapeutic opportunities. Semin Cancer Biol 2017; 49:75-82. [PMID: 28546110 DOI: 10.1016/j.semcancer.2017.05.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 05/12/2017] [Accepted: 05/19/2017] [Indexed: 12/15/2022]
Abstract
Tumor masses are deprived of oxygen and characterized by enhanced glucose uptake followed by glycolysis. Elevated glucose levels induce non-enzymatic glycosylation or glycation of proteins which leads to accumulation of advanced glycation end products (AGE). These AGE molecules bind to their respective receptors called the receptor for advanced glycation end products (RAGE) and initiate several aberrant signaling pathways leading to onset of diseases such as diabetes, Alzheimer's, atherosclerosis, heart failure and cancer. The role of AGE in cancer progression is being extensively studied in recent years. As cancer cells are hypoxic in nature and adapted to glycolysis, which induces glycation, its effects need to be understood in greater detail. Since AGE-RAGE signaling is involved in cancer progression, inhibition of AGE-RAGE interaction could be a potential therapeutic target. The purpose of this review is to highlight the role of AGE-RAGE interaction in hypoxic cancer cells.
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Affiliation(s)
- Mohammad Imran Khan
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin, Madison, WI-53706, USA
| | - Suvasmita Rath
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin, Madison, WI-53706, USA
| | - Vaqar Mustafa Adhami
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin, Madison, WI-53706, USA
| | - Hasan Mukhtar
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin, Madison, WI-53706, USA.
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269
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Raghav A, Ahmad J, Alam K. Nonenzymatic glycosylation of human serum albumin and its effect on antibodies profile in patients with diabetes mellitus. PLoS One 2017; 12:e0176970. [PMID: 28520799 PMCID: PMC5435419 DOI: 10.1371/journal.pone.0176970] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 04/20/2017] [Indexed: 12/24/2022] Open
Abstract
Background Albumin glycation and subsequent formation of advanced glycation end products (AGEs) correlate with diabetes and associated complications. Methods Human Serum Albumin (HSA) was modified with D-glucose for a 40 day period under sterile conditions at 37°C. Modified samples along with native HSA (unmodified) were analyzed for structural modifications by UV and fluorescence, FTIR, Liquid chromatography mass spectrometry (LCMS) and X–ray crystallography. New-Zealand white female rabbits immunized with AGEs, represent auto-antibodies formation as assessed by competitive and direct binding enzyme-linked immunosorbent assay (ELISA). Neo-epitopesagainst In-vitro formed AGEs were characterized in patients with diabetes mellitus type 2 (n = 50), type 1 (n = 50), gestational diabetes (n = 50) and type 2 with chronic kidney disease (CKD) with eGFR level 60–89 mL/min (n = 50) from serum direct binding ELISA. Results Glycated-HSA showed amarked increase in hyperchromicity of 65.82%,71.98%, 73.62% and 76.63% at λ280 nm along with anincreasein fluorescence intensity of 65.82%, 71.98%, 73.62% and 76.63% in glycated-HSA compared to native. FTIR results showed theshifting of Amide I peak from 1656 cm_1 to 1659 cm_1 and Amide II peak from 1554 cm_1 to 1564 cm_1 in glycated-HSA, with anew peak appearance of carbonyl group at 1737 cm-1. LCMS chromatogram of glycated-HSA showed thepresence of carboxymethyl lysine (CML) at 279.1 m/z. Immunological analysis showed high antibody titre>1:12,800 in theserum of rabbits immunized with glycated-HSA (modified with 400 mg/dL glucose) and inhibition of 84.65% at anantigen concentration of 20μg/mL. Maximum serum auto-antibody titre was found in T2DM (0.517±0.086), T1DM (0.108±0.092), GDM (0.611±0.041) and T2DM+CKD (0.096±0.25) patients immunized with glycated-HSA (modified with 400 mg/dL glucose). Conclusions Non-enzymatic glycosylation of HSA manifests immunological complications in diabetes mellitus due to change in its structure that enhances neo-epitopes generation.
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Affiliation(s)
- Alok Raghav
- Rajiv Gandhi Centre for Diabetes and Endocrinology,J.N. Medical College,Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Jamal Ahmad
- Rajiv Gandhi Centre for Diabetes and Endocrinology,J.N. Medical College,Aligarh Muslim University, Aligarh, Uttar Pradesh, India
- * E-mail:
| | - Khursheed Alam
- Department of Biochemistry,Faculty of Medicine,J.N. Medical College,Aligarh Muslim University, Aligarh, Uttar Pradesh, India
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270
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Fabre NT, Thieme K, Silva KS, Catanozi S, Cavaleiro AM, Pinto DAC, Okamoto MM, Morais MRPT, Falquetto B, Zorn TM, Machado UF, Passarelli M, Correa-Giannella ML. Hormetic modulation of hepatic insulin sensitivity by advanced glycation end products. Mol Cell Endocrinol 2017; 447:116-124. [PMID: 28238722 DOI: 10.1016/j.mce.2017.02.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 02/20/2017] [Accepted: 02/21/2017] [Indexed: 02/06/2023]
Abstract
Because of the paucity of information regarding metabolic effects of advanced glycation end products (AGEs) on liver, we evaluated effects of AGEs chronic administration in (1) insulin sensitivity; (2) hepatic expression of genes involved in AGEs, glucose and fat metabolism, oxidative stress and inflammation and; (3) hepatic morphology and glycogen content. Rats received intraperitoneally albumin modified (AlbAGE) or not by advanced glycation for 12 weeks. AlbAGE induced whole-body insulin resistance concomitantly with increased hepatic insulin sensitivity, evidenced by activation of AKT, inactivation of GSK3, increased hepatic glycogen content, and decreased expression of gluconeogenesis genes. Additionally there was reduction in hepatic fat content, in expression of lipogenic, pro-inflamatory and pro-oxidative genes and increase in reactive oxygen species and in nuclear expression of NRF2, a transcription factor essential to cytoprotective response. Although considered toxic, AGEs become protective when administered chronically, stimulating AKT signaling, which is involved in cellular defense and insulin sensitivity.
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Affiliation(s)
- Nelly T Fabre
- Laboratório de Carboidratos e Radioimunoensaios (Laboratório de Investigações Médicas, LIM-18), Faculdade de Medicina, Universidade de São Paulo (FMUSP), Brazil
| | - Karina Thieme
- Laboratório de Carboidratos e Radioimunoensaios (Laboratório de Investigações Médicas, LIM-18), Faculdade de Medicina, Universidade de São Paulo (FMUSP), Brazil
| | - Karolline S Silva
- Laboratório de Lípides (Laboratório de Investigações Médicas, LIM-10), FMUSP, Brazil
| | - Sérgio Catanozi
- Laboratório de Lípides (Laboratório de Investigações Médicas, LIM-10), FMUSP, Brazil
| | - Ana Mercedes Cavaleiro
- Laboratório de Carboidratos e Radioimunoensaios (Laboratório de Investigações Médicas, LIM-18), Faculdade de Medicina, Universidade de São Paulo (FMUSP), Brazil
| | - Danilo A C Pinto
- Laboratório de Metabolismo e Endocrinologia, Departamento de Fisiologia e Biofísica, Instituto de Ciências Biomédicas, Universidade de São Paulo, Brazil
| | - Maristela M Okamoto
- Laboratório de Metabolismo e Endocrinologia, Departamento de Fisiologia e Biofísica, Instituto de Ciências Biomédicas, Universidade de São Paulo, Brazil
| | - Mychel Raony P T Morais
- Laboratório de Biologia da Reprodução e Matriz Extracelular, Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade de São Paulo, Brazil
| | - Bárbara Falquetto
- Laboratório de Controle Cardiorrespiratório, Departamento de Farmacologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Brazil
| | - Telma M Zorn
- Laboratório de Biologia da Reprodução e Matriz Extracelular, Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade de São Paulo, Brazil
| | - Ubiratan F Machado
- Laboratório de Metabolismo e Endocrinologia, Departamento de Fisiologia e Biofísica, Instituto de Ciências Biomédicas, Universidade de São Paulo, Brazil
| | - Marisa Passarelli
- Laboratório de Lípides (Laboratório de Investigações Médicas, LIM-10), FMUSP, Brazil
| | - Maria Lúcia Correa-Giannella
- Laboratório de Carboidratos e Radioimunoensaios (Laboratório de Investigações Médicas, LIM-18), Faculdade de Medicina, Universidade de São Paulo (FMUSP), Brazil.
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271
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Gasparotto J, Ribeiro CT, Bortolin RC, Somensi N, Fernandes HS, Teixeira AA, Guasselli MOR, Agani CAJO, Souza NC, Grings M, Leipnitz G, Gomes HM, de Bittencourt Pasquali MA, Dunkley PR, Dickson PW, Moreira JCF, Gelain DP. Anti-RAGE antibody selectively blocks acute systemic inflammatory responses to LPS in serum, liver, CSF and striatum. Brain Behav Immun 2017; 62:124-136. [PMID: 28088642 DOI: 10.1016/j.bbi.2017.01.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 01/10/2017] [Accepted: 01/10/2017] [Indexed: 12/15/2022] Open
Abstract
Systemic inflammation induces transient or permanent dysfunction in the brain by exposing it to soluble inflammatory mediators. The receptor for advanced glycation endproducts (RAGE) binds to distinct ligands mediating and increasing inflammatory processes. In this study we used an LPS-induced systemic inflammation model in rats to investigate the effect of blocking RAGE in serum, liver, cerebrospinal fluid (CSF) and brain (striatum, prefrontal cortex, ventral tegmental area and substantia nigra). Intraperitoneal injection of RAGE antibody (50μg/kg) was followed after 1h by a single LPS (5mg/kg) intraperitoneal injection. Twenty-four hours later, tissues were isolated for analysis. RAGE antibody reduced LPS-induced inflammatory effects in both serum and liver; the levels of proinflammatory cytokines (TNF-α, IL-1β) were decreased and the phosphorylation/activation of RAGE downstream targets (ERK1/2, IκB and p65) in liver were significantly attenuated. RAGE antibody prevented LPS-induced effects on TNF-α and IL-1β in CSF. In striatum, RAGE antibody inhibited increases in IL-1β, Iba-1, GFAP, phospho-ERK1/2 and phospho-tau (ser202), as well as the decrease in synaptophysin levels. These effects were caused by systemic RAGE inhibition, as RAGE antibody did not cross the blood-brain barrier. RAGE antibody also prevented striatal lipoperoxidation and activation of mitochondrial complex II. In conclusion, blockade of RAGE is able to inhibit inflammatory responses induced by LPS in serum, liver, CSF and brain.
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Affiliation(s)
- Juciano Gasparotto
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Camila Tiefensee Ribeiro
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Rafael Calixto Bortolin
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Nauana Somensi
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Henrique Schaan Fernandes
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Alexsander Alves Teixeira
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Marcelo Otavio Rodrigues Guasselli
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Crepin Aziz Jose O Agani
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Natália Cabral Souza
- Centro de Tecnologia e Recursos Naturais, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil
| | - Mateus Grings
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Guilhian Leipnitz
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Henrique Mautone Gomes
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | - Peter R Dunkley
- School of Biomedical Sciences and Pharmacy and Hunter Medical Research Institute, University of Newcastle, Australia
| | - Phillip W Dickson
- School of Biomedical Sciences and Pharmacy and Hunter Medical Research Institute, University of Newcastle, Australia
| | - José Claudio Fonseca Moreira
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Daniel Pens Gelain
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
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272
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Deng R, Wu H, Ran H, Kong X, Hu L, Wang X, Su Q. Glucose-derived AGEs promote migration and invasion of colorectal cancer by up-regulating Sp1 expression. Biochim Biophys Acta Gen Subj 2017; 1861:1065-1074. [PMID: 28237576 DOI: 10.1016/j.bbagen.2017.02.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 01/29/2017] [Accepted: 02/21/2017] [Indexed: 01/11/2023]
Abstract
It is well established that the risk of colorectal cancer (CRC) is significantly increased in diabetic patients. As one of main forms of the advanced glycation end products (AGEs) that accumulate in vivo, glucose-derived AGEs play an important role in the pathogenesis of diabetic complications and may contribute to CRC progression. However, to date, both the contribution of glucose-derived AGEs to the course of CRC and the underlying mechanism are unclear. In the present study, the concentration of glucose-derived AGEs in the serum and tumor tissue of patients with CRC increased. A clinical data analysis demonstrated that the expression of the receptor for AGEs (RAGE), Specificity Protein 1 (Sp1), and matrix metallopeptidase -2 (MMP2) was significantly higher in cancerous tissues compared with non-tumor tissue in Chinese Han patients with CRC and that RAGE expression was closely associated with lymph node metastasis and TNM stage. Furthermore, in vivo and in vitro experiments showed that AGEs promoted invasion and migration of colorectal cancer, and the AGEs treatment increased the expression of RAGE, Sp1, and MMP2 in a dose-dependent manner. A RAGE blocking antibody and an Sp1-specific siRNA attenuated the AGE-induced effects. Moreover, the AGEs treatment increased the phosphorylation of ERK, and reducing the phosphorylation level of ERK by MEK1/2 inhibitor decreased the expression of Sp1. In conclusion, glucose-derived AGEs promote the invasion and metastasis of CRC partially through the RAGE/ERK/SP1/MMP2 cascade. These findings may provide an explanation for the poor prognoses of colorectal cancer in diabetic patients.
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Affiliation(s)
- Ruyuan Deng
- Department of Endocrinology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665, Kong Jiang Road, Shanghai 200092, China
| | - Huo Wu
- Department of General Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Hui Ran
- Department of Endocrinology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665, Kong Jiang Road, Shanghai 200092, China
| | - Xiang Kong
- Department of Endocrinology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665, Kong Jiang Road, Shanghai 200092, China
| | - Lei Hu
- Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xiao Wang
- Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Institute of Endocrine and Metabolic Diseases, Department of Endocrine and Metabolic Diseases, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China.
| | - Qing Su
- Department of Endocrinology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665, Kong Jiang Road, Shanghai 200092, China.
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273
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Prabhu SD, Frangogiannis NG. The Biological Basis for Cardiac Repair After Myocardial Infarction: From Inflammation to Fibrosis. Circ Res 2017; 119:91-112. [PMID: 27340270 DOI: 10.1161/circresaha.116.303577] [Citation(s) in RCA: 1384] [Impact Index Per Article: 197.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 04/15/2016] [Indexed: 12/14/2022]
Abstract
In adult mammals, massive sudden loss of cardiomyocytes after infarction overwhelms the limited regenerative capacity of the myocardium, resulting in the formation of a collagen-based scar. Necrotic cells release danger signals, activating innate immune pathways and triggering an intense inflammatory response. Stimulation of toll-like receptor signaling and complement activation induces expression of proinflammatory cytokines (such as interleukin-1 and tumor necrosis factor-α) and chemokines (such as monocyte chemoattractant protein-1/ chemokine (C-C motif) ligand 2 [CCL2]). Inflammatory signals promote adhesive interactions between leukocytes and endothelial cells, leading to extravasation of neutrophils and monocytes. As infiltrating leukocytes clear the infarct from dead cells, mediators repressing inflammation are released, and anti-inflammatory mononuclear cell subsets predominate. Suppression of the inflammatory response is associated with activation of reparative cells. Fibroblasts proliferate, undergo myofibroblast transdifferentiation, and deposit large amounts of extracellular matrix proteins maintaining the structural integrity of the infarcted ventricle. The renin-angiotensin-aldosterone system and members of the transforming growth factor-β family play an important role in activation of infarct myofibroblasts. Maturation of the scar follows, as a network of cross-linked collagenous matrix is formed and granulation tissue cells become apoptotic. This review discusses the cellular effectors and molecular signals regulating the inflammatory and reparative response after myocardial infarction. Dysregulation of immune pathways, impaired suppression of postinfarction inflammation, perturbed spatial containment of the inflammatory response, and overactive fibrosis may cause adverse remodeling in patients with infarction contributing to the pathogenesis of heart failure. Therapeutic modulation of the inflammatory and reparative response may hold promise for the prevention of postinfarction heart failure.
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Affiliation(s)
- Sumanth D Prabhu
- From the Division of Cardiovascular Disease, University of Alabama at Birmingham, and Medical Service, Birmingham VAMC (S.D.P.); and Department of Medicine, The Wilf Family Cardiovascular Research Institute, Albert Einstein College of Medicine, Bronx, NY (N.G.F.)
| | - Nikolaos G Frangogiannis
- From the Division of Cardiovascular Disease, University of Alabama at Birmingham, and Medical Service, Birmingham VAMC (S.D.P.); and Department of Medicine, The Wilf Family Cardiovascular Research Institute, Albert Einstein College of Medicine, Bronx, NY (N.G.F.).
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274
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Watanabe M, Toyomura T, Wake H, Liu K, Teshigawara K, Takahashi H, Nishibori M, Mori S. Advanced glycation end products attenuate the function of tumor necrosis factor-like weak inducer of apoptosis to regulate the inflammatory response. Mol Cell Biochem 2017; 434:153-162. [DOI: 10.1007/s11010-017-3045-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 04/25/2017] [Indexed: 12/31/2022]
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275
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Lin JA, Wu CH, Yen GC. Breadfruit flavonoid derivatives attenuate advanced glycation end products (AGEs)-enhanced colon malignancy in HCT116 cancer cells. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.01.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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276
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Liao ET, Tang NY, Lin YW, Liang Hsieh C. Long-term electrical stimulation at ear and electro-acupuncture at ST36-ST37 attenuated COX-2 in the CA1 of hippocampus in kainic acid-induced epileptic seizure rats. Sci Rep 2017; 7:472. [PMID: 28352122 PMCID: PMC5428861 DOI: 10.1038/s41598-017-00601-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 03/07/2017] [Indexed: 11/09/2022] Open
Abstract
Seizures produce brain inflammation, which in turn enhances neuronal excitability. Therefore, anti-inflammation has become a therapeutic strategy for antiepileptic treatment. Cycloxygenase-2 (COX-2) plays a critical role in postseizure brain inflammation and neuronal hyperexcitability. Our previous studies have shown that both electrical stimulation (ES) at the ear and electro-acupuncture (EA) at the Zusanli and Shangjuxu acupoints (ST36–ST37) for 6 weeks can reduce mossy fiber sprouting, spike population, and high-frequency hippocampal oscillations in kainic acid (KA)-induced epileptic seizure rats. This study further investigated the effect of long-term ear ES and EA at ST36–ST37 on the inflammatory response in KA-induced epileptic seizure rats. Both the COX-2 levels in the hippocampus and the number of COX-2 immunoreactive cells in the hippocampal CA1 region were increased after KA-induced epileptic seizures, and these were reduced through the 6-week application of ear ES or EA at ST36–ST37. Thus, long-term ear ES or long-term EA at ST36–ST37 have an anti-inflammatory effect, suggesting that they are beneficial for the treatment of epileptic seizures.
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Affiliation(s)
- En-Tzu Liao
- Graduate Institute of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan
| | - Nou-Ying Tang
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan
| | - Yi-Wen Lin
- School of Post-Baccalaureate Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan.,Graduate Institute of Acupuncture Science, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan.,Research Center for Chinese Medicine and Acupuncture, China Medical University, Taichung, 40402, Taiwan
| | - Ching Liang Hsieh
- Graduate Institute of Acupuncture Science, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan. .,Research Center for Chinese Medicine and Acupuncture, China Medical University, Taichung, 40402, Taiwan. .,Graduate Institute of Integrated Medicine, College of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan. .,Department of Chinese Medicine, China Medical University Hospital, Taichung, 40447, Taiwan.
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277
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Hu X, Bai T, Xu Z, Liu Q, Zheng Y, Cai L. Pathophysiological Fundamentals of Diabetic Cardiomyopathy. Compr Physiol 2017; 7:693-711. [PMID: 28333387 DOI: 10.1002/cphy.c160021] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Diabetic cardiomyopathy (DCM) was first recognized more than four decades ago and occurred independent of cardiovascular diseases or hypertension in both type 1 and type 2 diabetic patients. The exact mechanisms underlying this disease remain incompletely understood. Several pathophysiological bases responsible for DCM have been proposed, including the presence of hyperglycemia, nonenzymatic glycosylation of large molecules (e.g., proteins), energy metabolic disturbance, mitochondrial damage and dysfunction, impaired calcium handling, reactive oxygen species formation, inflammation, cardiac cell death, and cardiac hypertrophy and fibrosis, leading to impairment of cardiac contractile functions. Increasing evidence also indicates the phenomenon called "metabolic memory" for diabetes-induced cardiovascular complications, for which epigenetic modulation seemed to play an important role, suggesting that the aforementioned pathogenic bases may be regulated by epigenetic modification. Therefore, this review aims at briefly summarizing the current understanding of the pathophysiological bases for DCM. Although how epigenetic mechanisms play a role remains incompletely understood now, extensive clinical and experimental studies have implicated its importance in regulating the cardiac responses to diabetes, which are believed to shed insight into understanding of the pathophysiological and epigenetic mechanisms for the development of DCM and its possible prevention and/or therapy. © 2017 American Physiological Society. Compr Physiol 7:693-711, 2017.
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Affiliation(s)
- Xinyue Hu
- Center of Cardiovascular Diseases, the First Hospital of Jilin University, Changchun, China.,Pediatric Research Institute at the Department of Pediatrics of the University of Louisville, Louisville, Kentucky, USA
| | - Tao Bai
- Center of Cardiovascular Diseases, the First Hospital of Jilin University, Changchun, China.,Pediatric Research Institute at the Department of Pediatrics of the University of Louisville, Louisville, Kentucky, USA
| | - Zheng Xu
- Center of Cardiovascular Diseases, the First Hospital of Jilin University, Changchun, China.,Pediatric Research Institute at the Department of Pediatrics of the University of Louisville, Louisville, Kentucky, USA
| | - Qiuju Liu
- Department of Hematological Disorders the First Hospital of Jilin University, Changchun, China
| | - Yang Zheng
- Center of Cardiovascular Diseases, the First Hospital of Jilin University, Changchun, China
| | - Lu Cai
- Pediatric Research Institute at the Department of Pediatrics of the University of Louisville, Louisville, Kentucky, USA.,Wendy Novak Diabetes Care Center, University of Louisville, Louisville, Kentucky, USA
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278
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Zhou H, Ding L, Wu Z, Cao X, Zhang Q, Lin L, Bian JS. Hydrogen sulfide reduces RAGE toxicity through inhibition of its dimer formation. Free Radic Biol Med 2017; 104:262-271. [PMID: 28108276 DOI: 10.1016/j.freeradbiomed.2017.01.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Revised: 12/30/2016] [Accepted: 01/16/2017] [Indexed: 12/11/2022]
Abstract
RAGE is important in the development of neurodegenerative diseases. The present study was designed to investigate the effect of hydrogen sulfide (H2S, an endogenous gaseous mediator) on the cytotoxicity caused by RAGE activation during the chronic oxidative stress. Aβ1-42 decreased cell viability and induced cell senescence in SH-SY5Y cells. Treatment with advanced glycation end products (AGEs) induced cell injury in HEK293 cells stably expressing RAGE (HEK293-RAGE) and stimulated inflammatory responses in SH-SY5Y cells. Pretreatment of SH-SY5Y cells with an H2S donor, NaHS, significantly attenuated the above harmful effects caused by Aβ1-42 or AGEs. Western blotting analysis shows that oxidative stress enhanced RAGE protein expression which was attenuated by either NaHS or over-expression of cystathionine β-synthase (CBS), a critical enzyme for producing H2S in brain cells. Both Western blots and split GFP complementation analysis demonstrate that NaHS reduced H2O2-enhanced RAGE dimerization. Immunofluorescence analysis shows that H2O2 up-regulated the membrane expression of wild-type RAGE. However, H2O2-enhanced expression of the RAGE harboring C259S/C310S double mutation (DM-RAGE) was observed in the endoplasmic reticulum. Treatment with NaHS attenuated the effects of H2O2 on the protein expression of WT-RAGE, but not that of DM-RAGE. Cycloheximide chase and ubiquitination assays show that NaHS reduced the half-life of WT-RAGE to a similar level of DM-RAGE. S-sulfhydration assay with the tag-switch technique demonstrate that H2S may directly S-sulfhydrate the C259/C301 residues. Our data suggest that H2S reduces RAGE dimer formation and impairs its membrane stability. The lowered plasma membrane abundance of RAGE therefore helps to protect cells against various RAGE mediated pathological effects.
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Affiliation(s)
- Hong Zhou
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore
| | - Lei Ding
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore
| | - Zhiyuan Wu
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore; Life Science Institute, National University of Singapore, Singapore
| | - Xu Cao
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore
| | - Qichun Zhang
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore
| | - Li Lin
- Laboratory of Cardiovascular Sciences, National Institute on Aging, Baltimore, MD 21224, USA
| | - Jin-Song Bian
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore; Life Science Institute, National University of Singapore, Singapore.
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279
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Huang Q, Yang Z, Zhou JP, Luo Y. HMGB1 induces endothelial progenitor cells apoptosis via RAGE-dependent PERK/eIF2α pathway. Mol Cell Biochem 2017; 431:67-74. [PMID: 28251435 DOI: 10.1007/s11010-017-2976-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 02/16/2017] [Indexed: 02/06/2023]
Abstract
Studies have demonstrated that the high-mobility group 1B protein (HMGB1) could regulate endothelial progenitor cell (EPC) homing, but the effect of HMGB1 on EPC apoptosis and associated mechanisms are still unclear. The aim of this study was to investigate the effects of HMGB1 on EPC apoptosis and the possible involvement of the endoplasmic reticulum (ER) stress pathway. EPC apoptosis was determined by flow cytometry. The expressions of PERK, eIF2α, and CHOP were detected by western blotting. Additionally, the effects of PERK shRNA on the biological behaviors of EPCs were assessed. Our results showed that incubation of EPCs with HMGB1 (0.1-1 μg/ml) for 12-48 h induced apoptosis as well as activated ER stress transducers, as assessed by up-regulating PERK protein expression and eIF2α phosphorylation in a dose or time-dependent manner. Moreover, HMGB1-mediated EPC apoptosis and CHOP expression were dramatically suppressed by PERK shRNA or a specific eIF2α inhibitor (salubrinal). Importantly, a blocking antibody specifically targeted against RAGE (anti-RAGE antibody) markedly inhibited HMGB1-induced EPC apoptosis and ER stress marker protein (PERK, eIF2α, and CHOP) expression levels. Our novel findings suggest that HMGB1 triggered EPC apoptosis in a manner of RAGE-mediated activation of the PERK/eIF2α pathway.
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Affiliation(s)
- Qun Huang
- Department of Child Health Care, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, 410008, Hunan, China
| | - Zhen Yang
- Department of Hypertension and Vascular Disease, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, 510080, China
| | - Ji-Peng Zhou
- Department of Cardiovascular Medicine, Xiangya Hospital, Central South University, Xiangya Road 87#, Changsha, 410008, Hunan, China.
| | - Ying Luo
- Department of Geriatric Medicine, Xiangya Hospital, Central South University, Xiangya Road 87#, Changsha, 410008, Hunan, China.
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280
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RAGE-TLR Crosstalk Sustains Chronic Inflammation in Neurodegeneration. Mol Neurobiol 2017; 55:1463-1476. [PMID: 28168427 DOI: 10.1007/s12035-017-0419-4] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 01/24/2017] [Indexed: 01/10/2023]
Abstract
Chronic inflammatory reactions are consistenly present in neurodegeneration of Alzheimer type and are considered important factors that accelerate progression of the disease. Receptors of innate immunity participate in triggering and driving inflammatory reactions. For example, Toll-like receptors (TLRs) and receptor for advanced glycation end product (RAGE), major receptors of innate immunity, play a central role in perpetuation of inflammation. RAGE activation should be perceived as a primary mechanism which determines self-perpetuated chronic inflammation, and RAGE cooperation with TLRs amplifies inflammatory signaling. In this review, we highlight and discuss that RAGE-TLR crosstalk emerges as an important driving force of chronic inflammation in Alzheimer's disease.
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281
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Kim Y, Mook-Jung I. PRAK mediates Aβ-RAGE driven autophagy pathway. Oncotarget 2017; 8:5648-5649. [PMID: 28077795 PMCID: PMC5351562 DOI: 10.18632/oncotarget.14544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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282
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S100A12: Friend or foe in pulmonary tuberculosis? Cytokine 2017; 92:80-82. [PMID: 28110121 DOI: 10.1016/j.cyto.2017.01.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 01/08/2017] [Accepted: 01/10/2017] [Indexed: 11/23/2022]
Abstract
In humans, S100A12 (also named Calgranulin C and EN-RAGE) is mainly expressed and secreted by neutrophil granulocytes. Extracellular S100A12 is involved in innate immune responses against microorganisms and parasites. S100A12 is a ligand for the receptor for advanced glycation end products (RAGE), which is a cell surface receptor on macrophages, endothelium, and lymphocytes. In a recent study, Realegeno et al. showed that S100A12 exerts antimicrobial activity against Mycobacterium leprae in infected human macrophages. Recently, some interesting data on the antimicrobial activity of S100A12 have been reported. Proinflammatory role of S100A12 is supported by another newly found receptor, Toll-like receptor 4 (TLR4). These observations emphasize the importance of S100A12 for the development of potential therapeutic approaches to increase protective immunity or reduce immunopathogenesis.
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283
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Reynaert NL, Gopal P, Rutten EP, Wouters EF, Schalkwijk CG. Advanced glycation end products and their receptor in age-related, non-communicable chronic inflammatory diseases; Overview of clinical evidence and potential contributions to disease. Int J Biochem Cell Biol 2016; 81:403-418. [DOI: 10.1016/j.biocel.2016.06.016] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 06/24/2016] [Accepted: 06/28/2016] [Indexed: 12/31/2022]
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284
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Yatime L, Betzer C, Jensen R, Mortensen S, Jensen P, Andersen G. The Structure of the RAGE:S100A6 Complex Reveals a Unique Mode of Homodimerization for S100 Proteins. Structure 2016; 24:2043-2052. [DOI: 10.1016/j.str.2016.09.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 08/26/2016] [Accepted: 10/05/2016] [Indexed: 01/10/2023]
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285
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Doucet J, Lee HK, Goring DR. Pollen Acceptance or Rejection: A Tale of Two Pathways. TRENDS IN PLANT SCIENCE 2016; 21:1058-1067. [PMID: 27773670 DOI: 10.1016/j.tplants.2016.09.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 09/02/2016] [Accepted: 09/26/2016] [Indexed: 05/21/2023]
Abstract
While the molecular and cellular basis of self-incompatibility leading to self-pollen rejection in the Brassicaceae has been extensively studied, relatively little attention has been paid to compatible pollen recognition and the corresponding cellular responses in the stigmatic papillae. This is now changing because research has started to uncover steps in the Brassicaceae 'basal compatible pollen response pathway' in the stigma leading to pollen hydration and germination. Furthermore, recent studies suggest that self-incompatible pollen activates both the basal compatible pathway and the self-incompatibility pathway in the stigma, with the self-incompatibility response ultimately prevailing to reject self-pollen. We review here recent discoveries in both pathways and discuss how compatible pollen is accepted by the stigma versus the rejection of self-incompatible pollen.
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Affiliation(s)
- Jennifer Doucet
- Department of Cell and Systems Biology, University of Toronto, Toronto M5S 3B2, Canada
| | - Hyun Kyung Lee
- Department of Cell and Systems Biology, University of Toronto, Toronto M5S 3B2, Canada
| | - Daphne R Goring
- Department of Cell and Systems Biology, University of Toronto, Toronto M5S 3B2, Canada; Centre for the Analysis of Genome Evolution and Function, University of Toronto, Toronto M5S 3B2, Canada.
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286
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Kumar Pasupulati A, Chitra PS, Reddy GB. Advanced glycation end products mediated cellular and molecular events in the pathology of diabetic nephropathy. Biomol Concepts 2016; 7:293-309. [DOI: 10.1515/bmc-2016-0021] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 09/18/2016] [Indexed: 01/11/2023] Open
Abstract
AbstractDiabetic nephropathy (DN) is a major cause of morbidity and mortality in diabetic patients and a leading cause of end-stage renal disease (ESRD). Degenerative changes such as glomerular hypertrophy, hyperfiltration, widening of basement membranes, tubulointerstitial fibrosis, glomerulosclerosis and podocytopathy manifest in various degrees of proteinuria in DN. One of the key mechanisms implicated in the pathogenesis of DN is non-enzymatic glycation (NEG). NEG is the irreversible attachment of reducing sugars onto free amino groups of proteins by a series of events, which include the formation of Schiff’s base and an Amadori product to yield advanced glycation end products (AGEs). AGE modification of client proteins from the extracellular matrix induces crosslinking, which is often associated with thickening of the basement membrane. AGEs activate several intracellular signaling cascades upon interaction with receptor for AGEs (RAGE), which manifest in aberrant cellular responses such as inflammation, apoptosis and autophagy, whereas other receptors such as AGE-R1, AGE-R3 and scavenger receptors also bind to AGEs and ensue endocytosis and degradation of AGEs. Elevated levels of both serum and tissue AGEs are associated with adverse renal outcome. Increased evidence supports that attenuation of AGE formation and/or inhibition of RAGE activation manifest(s) in improving renal function. This review provides insights of NEG, discusses the cellular and molecular events triggered by AGEs, which manifest in the pathogenesis of DN including renal fibrosis, podocyte epithelial-mesenchymal transition and activation of renin-angiotensin system. Therapies designed to target AGEs, such as inhibitors of AGEs formation and crosslink breakers, are discussed.
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Affiliation(s)
| | - P. Swathi Chitra
- 2Department of Biochemistry, National Institute of Nutrition, Tarnaka, Hyderabad 500 007, India
| | - G. Bhanuprakash Reddy
- 2Department of Biochemistry, National Institute of Nutrition, Tarnaka, Hyderabad 500 007, India
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287
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Li Y, Li X, Qu Y, Huang J, Zhu T, Zhao F, Li S, Mu D. Role of HMGB1 translocation to neuronal nucleus in rat model with septic brain injury. Neurosci Lett 2016; 645:90-96. [PMID: 27889435 DOI: 10.1016/j.neulet.2016.11.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 11/21/2016] [Accepted: 11/22/2016] [Indexed: 12/13/2022]
Abstract
High-mobility Group Box-1 (HMGB1) is a central late proinflammatory cytokine that triggers the inflammatory response during sepsis. However, whether HMGB1 is involved in the pathogenesis of septic brain damage is unknown. In this study, we investigated the role of HMGB1 in regulating brain injury in a rat model of sepsis. Wistar rats were subjected to cecal ligation and puncture (CLP) to induce septic brain injury. Hematoxylin and eosin staining was used to detect pathological changes in the cortex. The cellular localization of HMGB1 was determined using immunostaining. Cortical levels of HMGB1, its receptor for advanced glycation end-products (RAGE), and downstream effecter, nuclear factor kappa-B (NF-κB) subunit p65, were detected via western blot.HMGB1was increased in the cytoplasm via translocation from the nucleus predominantly in neurons. Moreover, RAGE and NF-κB p65 were upregulated after septic brain injury. Ethyl pyruvate, an inhibitor of HMGB1, down-regulated the expression of RAGE and NF-κB p65via inhibiting HMGB1 expression in the cytoplasm. Collectively, our findings suggest that HMGB1 and its signaling transduction have critical roles in the pathogenesis of septic brain injury. HMGB1 inhibition might be a potential new therapeutic target for septic brain injury.
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Affiliation(s)
- Yafei Li
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu 610041,China
| | - Xihong Li
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu 610041,China.
| | - Yi Qu
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu 610041,China
| | - Jichong Huang
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu 610041,China
| | - Tingting Zhu
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu 610041,China
| | - Fengyan Zhao
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu 610041,China
| | - Shiping Li
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu 610041,China
| | - Dezhi Mu
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu 610041,China.
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288
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Wang Y, Li C, Gao C, Li Z, Yang J, Liu X, Liang F. Effects of hyperbaric oxygen therapy on RAGE and MCP-1 expression in rats with spinal cord injury. Mol Med Rep 2016; 14:5619-5625. [DOI: 10.3892/mmr.2016.5935] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 08/19/2016] [Indexed: 11/06/2022] Open
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289
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Machahua C, Montes-Worboys A, Llatjos R, Escobar I, Dorca J, Molina-Molina M, Vicens-Zygmunt V. Increased AGE-RAGE ratio in idiopathic pulmonary fibrosis. Respir Res 2016; 17:144. [PMID: 27816054 PMCID: PMC5097848 DOI: 10.1186/s12931-016-0460-2] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 10/28/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The abnormal epithelial-mesenchymal restorative capacity in idiopathic pulmonary fibrosis (IPF) has been recently associated with an accelerated aging process as a key point for the altered wound healing. The advanced glycation end-products (AGEs) are the consequence of non-enzymatic reactions between lipid and protein with several oxidants in the aging process. The receptor for AGEs (RAGEs) has been implicated in the lung fibrotic process and the alveolar homeostasis. However, this AGE-RAGE aging pathway has been under-explored in IPF. METHODS Lung samples from 16 IPF and 9 control patients were obtained through surgical lung biopsy. Differences in AGEs and RAGE expression between both groups were evaluated by RT-PCR, Western blot and immunohistochemistry. The effect of AGEs on cell viability of primary lung fibrotic fibroblasts and alveolar epithelial cells was assessed. Cell transformation of fibrotic fibroblasts cultured into glycated matrices was evaluated in different experimental conditions. RESULTS Our study demonstrates an increase of AGEs together with a decrease of RAGEs in IPF lungs, compared with control samples. Two specific AGEs involved in aging, pentosidine and Nε-Carboxymethyl lysine, were significantly increased in IPF samples. The immunohistochemistry identified higher staining of AGEs related to extracellular matrix (ECM) proteins and the apical surface of the alveolar epithelial cells (AECs) surrounding fibroblast foci in fibrotic lungs. On the other hand, RAGE location was present at the cell membrane of AECs in control lungs, while it was almost missing in pulmonary fibrotic tissue. In addition, in vitro cultures showed that the effect of AGEs on cell viability was different for AECs and fibrotic fibroblasts. AGEs decreased cell viability in AECs, even at low concentration, while fibroblast viability was less affected. Furthermore, fibroblast to myofibroblast transformation could be enhanced by ECM glycation. CONCLUSIONS All of these findings suggest a possible role of the increased ratio AGEs-RAGEs in IPF, which could be a relevant accelerating aging tissue reaction in the abnormal wound healing of the lung fibrotic process.
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Affiliation(s)
- Carlos Machahua
- Pneumology Research Group, IDIBELL, University of Barcelona, Barcelona, Spain
- Department of Pneumology, Unit of Interstitial Lung Diseases, University Hospital of Bellvitge, Barcelona, Spain
| | - Ana Montes-Worboys
- Pneumology Research Group, IDIBELL, University of Barcelona, Barcelona, Spain
- Department of Pneumology, Unit of Interstitial Lung Diseases, University Hospital of Bellvitge, Barcelona, Spain
- Research Network in Respiratory Diseases (CIBERES), Madrid, Spain
| | - Roger Llatjos
- Department of Pathology, University Hospital of Bellvitge, Barcelona, Spain
| | - Ignacio Escobar
- Department of Thoracic Surgery, University Hospital of Bellvitge, Barcelona, Spain
| | - Jordi Dorca
- Pneumology Research Group, IDIBELL, University of Barcelona, Barcelona, Spain
- Department of Pneumology, Unit of Interstitial Lung Diseases, University Hospital of Bellvitge, Barcelona, Spain
- Research Network in Respiratory Diseases (CIBERES), Madrid, Spain
| | - Maria Molina-Molina
- Pneumology Research Group, IDIBELL, University of Barcelona, Barcelona, Spain
- Department of Pneumology, Unit of Interstitial Lung Diseases, University Hospital of Bellvitge, Barcelona, Spain
- Research Network in Respiratory Diseases (CIBERES), Madrid, Spain
| | - Vanesa Vicens-Zygmunt
- Pneumology Research Group, IDIBELL, University of Barcelona, Barcelona, Spain
- Department of Pneumology, Unit of Interstitial Lung Diseases, University Hospital of Bellvitge, Barcelona, Spain
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290
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Hassanian SM, Ardeshirylajimi A, Dinarvand P, Rezaie AR. Inorganic polyphosphate promotes cyclin D1 synthesis through activation of mTOR/Wnt/β-catenin signaling in endothelial cells. J Thromb Haemost 2016; 14:2261-2273. [PMID: 27546592 PMCID: PMC5116009 DOI: 10.1111/jth.13477] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 08/09/2016] [Indexed: 02/04/2023]
Abstract
Essentials Polyphosphate (polyP) activates mTOR but its role in Wnt/β-catenin signaling is not known. PolyP-mediated cyclin D1 expression (β-catenin target gene) was monitored in endothelial cells. PolyP and boiled platelet-releasates induced the expression of cyclin D1 by similar mechanisms. PolyP establishes crosstalk between mTOR and Wnt/β-catenin signaling in endothelial cells. SUMMARY Background Inorganic polyphosphate (polyP) elicits intracellular signaling responses in endothelial cells through activation of mTOR complexes 1 and 2. Glycogen synthase kinase 3 (GSK-3) is known to be a negative regulator of mTOR and Wnt/β-catenin signaling pathways. Objective The objective of this study was to investigate the effect of polyP on the expression, degradation and subcellular localization of the Wnt/β-catenin target gene, cyclin D1, in endothelial cells. Methods Regulation of cyclin D1 expression, phosphorylation and subcellular localization by polyP or platelet releasates was monitored in the absence and presence of pharmacological inhibitors and/or siRNA for specific molecules of the upstream mTOR/Wnt/β-catenin signaling network by established methods. Results Both synthetic polyP and boiled-platelet releasates induced the phosphorylation-dependent inactivation of GSK-3, thereby increasing the expression and nuclear localization, but inhibiting the degradation of cyclin D1. Inhibitors of mTORC1 (PI3K, AKT, PLC, PKC), rapamycin and siRNA for raptor (mTORC1-specific component) and β-catenin, all inhibited polyP-mediated regulation of cyclin D1 expression, phosphorylation and subcellular localization in endothelial cells. The signaling effect of polyP was effectively inhibited by the recombinant extracellular domain of the receptor for advanced glycation end products (RAGE) and/or by the RAGE siRNA. Specific pharmacological inhibitors and siRNA knockdown of ERK1/2 and NF-κB pathways indicated that polyP-mediated cyclin D1 expression and nuclear localization are IKKɑ and ERK1/2 dependent, whereas its inhibitory effect on phosphorylation-dependent degradation of cyclin D1 is IKKβ-dependent. Conclusion We conclude that a RAGE-dependent polyP-mediated crosstalk between mTOR and the GSK-3/Wnt/β-catenin signaling network can modulate important physiological processes in endothelial cells.
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Affiliation(s)
- S M Hassanian
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, Saint Louis, MO, USA
| | - A Ardeshirylajimi
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, Saint Louis, MO, USA
| | - P Dinarvand
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, Saint Louis, MO, USA
| | - A R Rezaie
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, Saint Louis, MO, USA
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291
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Moz S, Basso D, Bozzato D, Galozzi P, Navaglia F, Negm OH, Arrigoni G, Zambon CF, Padoan A, Tighe P, Todd I, Franchin C, Pedrazzoli S, Punzi L, Plebani M. SMAD4 loss enables EGF, TGFβ1 and S100A8/A9 induced activation of critical pathways to invasion in human pancreatic adenocarcinoma cells. Oncotarget 2016; 7:69927-69944. [PMID: 27655713 PMCID: PMC5342525 DOI: 10.18632/oncotarget.12068] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 09/05/2016] [Indexed: 12/12/2022] Open
Abstract
Epidermal Growth Factor (EGF) receptor overexpression, KRAS, TP53, CDKN2A and SMAD4 mutations characterize pancreatic ductal adenocarcinoma. This mutational landscape might influence cancer cells response to EGF, Transforming Growth Factor β1 (TGFβ1) and stromal inflammatory calcium binding proteins S100A8/A9. We investigated whether chronic exposure to EGF modifies in a SMAD4-dependent manner pancreatic cancer cell signalling, proliferation and invasion in response to EGF, TGFβ1 and S100A8/A9. BxPC3, homozigously deleted (HD) for SMAD4, and BxPC3-SMAD4+ cells were or not stimulated with EGF (100 ng/mL) for three days. EGF pre-treated and non pretreated cells were stimulated with a single dose of EGF (100 ng/mL), TGFβ1 (0,02 ng/mL), S100A8/A9 (10 nM). Signalling pathways (Reverse Phase Protein Array and western blot), cell migration (Matrigel) and cell proliferation (XTT) were evaluated. SMAD4 HD constitutively activated ERK and Wnt/β-catenin, while inhibiting PI3K/AKT pathways. These effects were antagonized by chronic EGF, which increased p-BAD (anti-apoptotic) in response to combined TGFβ1 and S100A8/A9 stimulation. SMAD4 HD underlied the inhibition of NF-κB and PI3K/AKT in response to TGFβ1 and S100A8/A9, which also induced cell migration. Chronic EGF exposure enhanced cell migration of both BxPC3 and BxPC3-SMAD4+, rendering the cells less sensitive to the other inflammatory stimuli. In conclusion, SMAD4 HD is associated with the constitutive activation of the ERK and Wnt/β-catenin signalling pathways, and favors the EGF-induced activation of multiple signalling pathways critical to cancer proliferation and invasion. TGFβ1 and S100A8/A9 mainly inhibit NF-κB and PI3K/AKT pathways and, when combined, sinergize with EGF in enhancing anti-apoptotic p-BAD in a SMAD4-dependent manner.
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Affiliation(s)
- Stefania Moz
- University of Padova, Laboratory Medicine, Department of Medicine - DIMED, Padova, Italy
| | - Daniela Basso
- University of Padova, Laboratory Medicine, Department of Medicine - DIMED, Padova, Italy
| | - Dania Bozzato
- University of Padova, Laboratory Medicine, Department of Medicine - DIMED, Padova, Italy
| | - Paola Galozzi
- University of Padova, Rheumatology Unit, Department of Medicine - DIMED, Padova, Italy
| | - Filippo Navaglia
- University of Padova, Laboratory Medicine, Department of Medicine - DIMED, Padova, Italy
| | - Ola H. Negm
- University of Nottingham, School of Life Sciences, Queen's Medical Centre, Nottingham, UK
- Mansoura University, Medical Microbiology and Immunology Department, Faculty of Medicine, Mansoura City, Egypt
| | - Giorgio Arrigoni
- University of Padova, Department of Biomedical Sciences, Padova, Italy
- Proteomics Center, University of Padova and Azienda Ospedaliera di Padova, Padova, Italy
| | - Carlo-Federico Zambon
- University of Padova, Laboratory Medicine, Department of Medicine - DIMED, Padova, Italy
| | - Andrea Padoan
- University of Padova, Laboratory Medicine, Department of Medicine - DIMED, Padova, Italy
| | - Paddy Tighe
- University of Nottingham, School of Life Sciences, Queen's Medical Centre, Nottingham, UK
| | - Ian Todd
- University of Nottingham, School of Life Sciences, Queen's Medical Centre, Nottingham, UK
| | - Cinzia Franchin
- University of Padova, Department of Biomedical Sciences, Padova, Italy
- Proteomics Center, University of Padova and Azienda Ospedaliera di Padova, Padova, Italy
| | | | - Leonardo Punzi
- University of Padova, Rheumatology Unit, Department of Medicine - DIMED, Padova, Italy
| | - Mario Plebani
- University of Padova, Laboratory Medicine, Department of Medicine - DIMED, Padova, Italy
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The Role of Neutrophil Proteins on the Amyloid Beta-RAGE Axis. PLoS One 2016; 11:e0163330. [PMID: 27676391 PMCID: PMC5038948 DOI: 10.1371/journal.pone.0163330] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 09/06/2016] [Indexed: 01/11/2023] Open
Abstract
We previously showed an elevated expression of the neutrophil protein, cationic antimicrobial protein of 37kDa (CAP37), in brains of patients with Alzheimer’s disease (AD), suggesting that CAP37 could be involved in AD pathogenesis. The first step in determining how CAP37 might contribute to AD pathogenesis was to identify the receptor through which it induces cell responses. To identify a putative receptor, we performed GAMMA analysis to determine genes that positively correlated with CAP37 in terms of expression. Positive correlations with ligands for the receptor for advanced glycation end products (RAGE) were observed. Additionally, CAP37 expression positively correlated with two other neutrophil proteins, neutrophil elastase and cathepsin G. Enzyme-linked immunosorbent assays (ELISAs) demonstrated an interaction between CAP37, neutrophil elastase, and cathepsin G with RAGE. Amyloid beta 1–42 (Aβ1–42), a known RAGE ligand, accumulates in AD brains and interacts with RAGE, contributing to Aβ1–42 neurotoxicity. We questioned whether the binding of CAP37, neutrophil elastase and/or cathepsin G to RAGE could interfere with Aβ1–42 binding to RAGE. Using ELISAs, we determined that CAP37 and neutrophil elastase inhibited binding of Aβ1–42 to RAGE, and this effect was reversed by protease inhibitors in the case of neutrophil elastase. Since neutrophil elastase and cathepsin G have enzymatic activity, mass spectrometry was performed to determine the proteolytic activity of all three neutrophil proteins on Aβ1–42. All three neutrophil proteins bound to Aβ1–42 with different affinities and cleaved Aβ1–42 with different kinetics and substrate specificities. We posit that these neutrophil proteins could modulate neurotoxicity in AD by cleaving Aβ1–42 and influencing the Aβ1–42 –RAGE interaction. Further studies will be required to determine the biological significance of these effects and their relevance in neurodegenerative diseases such as AD. Our findings identify a novel area of study that underscores the importance of neutrophils and neutrophil proteins in neuroinflammatory diseases such as AD.
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294
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Hunt WR, Helfman BR, McCarty NA, Hansen JM. Advanced glycation end products are elevated in cystic fibrosis-related diabetes and correlate with worse lung function. J Cyst Fibros 2016; 15:681-8. [DOI: 10.1016/j.jcf.2015.12.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 11/09/2015] [Accepted: 12/14/2015] [Indexed: 11/27/2022]
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295
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HMGB1, IL-1α, IL-33 and S100 proteins: dual-function alarmins. Cell Mol Immunol 2016; 14:43-64. [PMID: 27569562 PMCID: PMC5214941 DOI: 10.1038/cmi.2016.34] [Citation(s) in RCA: 324] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 05/16/2016] [Accepted: 05/17/2016] [Indexed: 02/08/2023] Open
Abstract
Our immune system is based on the close collaboration of the innate and adaptive immune systems for the rapid detection of any threats to the host. Recognition of pathogen-derived molecules is entrusted to specific germline-encoded signaling receptors. The same receptors have now also emerged as efficient detectors of misplaced or altered self-molecules that signal tissue damage and cell death following, for example, disruption of the blood supply and subsequent hypoxia. Many types of endogenous molecules have been shown to provoke such sterile inflammatory states when released from dying cells. However, a group of proteins referred to as alarmins have both intracellular and extracellular functions which have been the subject of intense research. Indeed, alarmins can either exert beneficial cell housekeeping functions, leading to tissue repair, or provoke deleterious uncontrolled inflammation. This group of proteins includes the high-mobility group box 1 protein (HMGB1), interleukin (IL)-1α, IL-33 and the Ca2+-binding S100 proteins. These dual-function proteins share conserved regulatory mechanisms, such as secretory routes, post-translational modifications and enzymatic processing, that govern their extracellular functions in time and space. Release of alarmins from mesenchymal cells is a highly relevant mechanism by which immune cells can be alerted of tissue damage, and alarmins play a key role in the development of acute or chronic inflammatory diseases and in cancer development.
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296
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Hsia TC, Yin MC, Mong MC. Advanced Glycation End-Products Enhance Lung Cancer Cell Invasion and Migration. Int J Mol Sci 2016; 17:ijms17081289. [PMID: 27517907 PMCID: PMC5000686 DOI: 10.3390/ijms17081289] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 08/02/2016] [Accepted: 08/04/2016] [Indexed: 12/23/2022] Open
Abstract
Effects of carboxymethyllysine (CML) and pentosidine, two advanced glycation end-products (AGEs), upon invasion and migration in A549 and Calu-6 cells, two non-small cell lung cancer (NSCLC) cell lines were examined. CML or pentosidine at 1, 2, 4, 8 or 16 μmol/L were added into cells. Proliferation, invasion and migration were measured. CML or pentosidine at 4-16 μmol/L promoted invasion and migration in both cell lines, and increased the production of reactive oxygen species, tumor necrosis factor-α, interleukin-6 and transforming growth factor-β1. CML or pentosidine at 2-16 μmol/L up-regulated the protein expression of AGE receptor, p47(phox), intercellular adhesion molecule-1 and fibronectin in test NSCLC cells. Matrix metalloproteinase-2 protein expression in A549 and Calu-6 cells was increased by CML or pentosidine at 4-16 μmol/L. These two AGEs at 2-16 μmol/L enhanced nuclear factor κ-B (NF-κ B) p65 protein expression and p38 phosphorylation in A549 cells. However, CML or pentosidine at 4-16 μmol/L up-regulated NF-κB p65 and p-p38 protein expression in Calu-6 cells. These findings suggest that CML and pentosidine, by promoting the invasion, migration and production of associated factors, benefit NSCLC metastasis.
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Affiliation(s)
- Te-Chun Hsia
- Department of Respiratory Therapy, China Medical University, 40402 Taichung City, Taiwan.
- Department of Internal Medicine, China Medical University Hospital, 40402 Taichung City, Taiwan.
| | - Mei-Chin Yin
- Department of Nutrition, China Medical University, 40402 Taichung City, Taiwan.
- Department of Health and Nutrition Biotechnology, Asia University, 41354 Taichung City, Taiwan.
| | - Mei-Chin Mong
- Department of Health and Nutrition Biotechnology, Asia University, 41354 Taichung City, Taiwan.
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297
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Yao L, Zhao H, Tang H, Liang J, Liu L, Dong H, Zou F, Cai S. The receptor for advanced glycation end products is required for β-catenin stabilization in a chemical-induced asthma model. Br J Pharmacol 2016; 173:2600-13. [PMID: 27332707 DOI: 10.1111/bph.13539] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Revised: 06/11/2016] [Accepted: 06/14/2016] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND AND PURPOSE Cytoplasmic retention of β-catenin will lead to its nuclear translocation and subsequent interaction with the transcription factor TCF/LEF that regulates target gene expression. We have previously demonstrated aberrant expression of β-catenin in a model of asthma induced by toluene diisocyanate (TDI). The aim of this study was to examine whether the receptor for advanced glycation end products (RAGE) can regulate β-catenin expression in TDI-induced asthma. EXPERIMENTAL APPROACH Male BALB/c mice were sensitized and challenged with TDI to generate a chemically-induced asthma model. Inhibitors of RAGE, FPS-ZM1 and the RAGE antagonist peptide (RAP), were injected i.p. after each challenge. Airway resistance was measured in vivo and bronchoalveolar lavage fluid was analysed. Lungs were examined by histology and immunohistochemistry. Western blotting and quantitative PCR were also used. KEY RESULTS Expression of RAGE and of its ligands HMGB1, S100A12, S100B, HSP70 was increased in TDI-exposed lungs. These increases were inhibited by FPS-ZM1 or RAP. Either antagonist blunted airway reactivity, airway inflammation and goblet cell metaplasia, and decreased release of Th2 cytokines. TDI exposure decreased level of membrane β-catenin, phosphorylated Akt (Ser(473) ), inactivated GSK3β (Ser(9) ), dephosphorylated β-catenin at Ser(33) /(37) /Thr(41) , which controls its cytoplasmic degradation, increased phosphorylated β-catenin at Ser(552) , raised cytoplasmic and nuclear levels of β-catenin and up-regulated its targeted gene expression (MMP2, MMP7, MMP9, VEGF, cyclin D1, fibronectin), all of which were reversed by RAGE inhibition. CONCLUSION AND IMPLICATIONS RAGE was required for stabilization of β-catenin in TDI-induced asthma, identifying protective effects of RAGE blockade in this model.
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Affiliation(s)
- Lihong Yao
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Haijin Zhao
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Haixiong Tang
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Junjie Liang
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Laiyu Liu
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Hangming Dong
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Fei Zou
- School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, China
| | - Shaoxi Cai
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
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298
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Pastino AK, Greco TM, Mathias RA, Cristea IM, Schwarzbauer JE. Stimulatory effects of advanced glycation endproducts (AGEs) on fibronectin matrix assembly. Matrix Biol 2016; 59:39-53. [PMID: 27425255 DOI: 10.1016/j.matbio.2016.07.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 07/12/2016] [Accepted: 07/12/2016] [Indexed: 01/28/2023]
Abstract
Advanced glycation endproducts (AGEs) are a heterogeneous group of compounds that form via non-enzymatic glycation of proteins throughout our lifespan and at a higher rate in certain chronic diseases such as diabetes. AGEs contribute to the progression of fibrosis, in part by stimulating cellular pathways that affect gene expression. Long-lived ECM proteins are targets for non-enzymatic glycation but the question of whether the AGE-modified ECM leads to excess ECM accumulation and fibrosis remains unanswered. In this study, cellular changes due to AGE accretion in the ECM were investigated. Non-enzymatic glycation of proteins in a decellularized fibroblast ECM was achieved by incubating the ECM in a solution of methylglyoxal (MGO). Mass spectrometry of fibronectin (FN) isolated from the glycated matrix identified twenty-eight previously unidentified MGO-derived AGE modification sites including functional sites such as the RGD integrin-binding sequence. Mesangial cells grown on the glycated, decellularized matrix assembled increased amounts of FN matrix. Soluble AGE-modified bovine serum albumin (BSA) also stimulated FN matrix assembly and this effect was reduced by function-blocking antibodies against the receptor for AGE (RAGE). These results indicate that cells respond to AGEs by increasing matrix assembly and that RAGE is involved in this response. This raises the possibility that the accumulation of ECM during the progression of fibrosis may be enhanced by cell interactions with AGEs on a glycated ECM.
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Affiliation(s)
- Alexandra K Pastino
- Department of Molecular Biology, Princeton University, Washington Road, Princeton, NJ 08544-1014, USA
| | - Todd M Greco
- Department of Molecular Biology, Princeton University, Washington Road, Princeton, NJ 08544-1014, USA
| | - Rommel A Mathias
- Department of Molecular Biology, Princeton University, Washington Road, Princeton, NJ 08544-1014, USA
| | - Ileana M Cristea
- Department of Molecular Biology, Princeton University, Washington Road, Princeton, NJ 08544-1014, USA
| | - Jean E Schwarzbauer
- Department of Molecular Biology, Princeton University, Washington Road, Princeton, NJ 08544-1014, USA.
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299
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Rowisha M, El-Batch M, El Shikh T, El Melegy S, Aly H. Soluble receptor and gene polymorphism for AGE: relationship with obesity and cardiovascular risks. Pediatr Res 2016; 80:67-71. [PMID: 26991258 DOI: 10.1038/pr.2016.55] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 12/30/2015] [Indexed: 01/24/2023]
Abstract
BACKGROUND Obesity in adolescents has quadrupled in the past 30 y. Markers for cardiovascular risks are needed in this population. We hypothesized that soluble receptor for advanced glycation end products (sRAGE) and asymmetric dimethyl arginine (ADMA) can correlate with carotid intima-media thickness (cIMT), a known index of subclinical atherosclerosis. We also aimed to evaluate the frequency of (Gly82Ser) RAGE gene polymorphism in obese adolescents. METHODS Obese and nonobese adolescents were evaluated in a cross-sectional study for lipid profile, insulin resistance, ADMA, sRAGE, and RAGE gene (Gly 82 Ser) polymorphism. We measured cIMT in all subjects and performed correlation analyses with all markers. RESULTS The study included 50 obese and 40 healthy control adolescents. Compared to controls, obese subjects had less sRAGE (P = 0.02) and greater cIMT (P = 0.006), insulin resistance (P < 0.0001), and ADMA (P < 0.0001). In a multivariate linear regression model, sRAGE was associated with cIMT (β = 0.28, P = 0.04). Both GS and SS genotypes of RAGE were more frequent in obese than controls (P = 0.04). CONCLUSION Increased ADMA and decreased sRAGE are associated with cardiovascular risks in obese adolescents. The S allele in RAGE gene is more frequently detected with obesity. The role of RAGE gene and mechanisms leading to cardiovascular risks need further studying.
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Affiliation(s)
- Mohamed Rowisha
- Department of Pediatrics, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Manal El-Batch
- Department of Medical Biochemistry, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Thanaa El Shikh
- Department of Medical Biochemistry, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Salwa El Melegy
- Department of Medical Biochemistry, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Hany Aly
- Department of Pediatrics, the George Washington University and Children's National Medical Center, Washington, DC
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Kato J, Agalave NM, Svensson CI. Pattern recognition receptors in chronic pain: Mechanisms and therapeutic implications. Eur J Pharmacol 2016; 788:261-273. [PMID: 27343378 DOI: 10.1016/j.ejphar.2016.06.039] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 06/22/2016] [Accepted: 06/22/2016] [Indexed: 12/13/2022]
Abstract
For the individual, it is vital to promptly detect and recognize a danger that threatens the integrity of the body. Pattern recognition receptors (PRRs) are several classes of protein families originally classified as receptors detecting exogenous pathogens. PRRs are also capable of recognizing molecules released from damaged tissues (damage-associated molecular pattern molecules; DAMPs) and thereby contribute to danger recognition. Importantly, it is now evident that PRRs, such as toll-like receptors (TLRs) and receptors for advanced glycation end products (RAGE), are not only expressed in peripheral immune cells but also present in neurons and glial cells in the nervous system. These PRR-expressing cells work in concert, enabling highly sensitive danger recognition. However, this sensitiveness can act as a double-edged sword. Accumulated evidence has led to the hypothesis that aberrant activation of PRRs may play a crucial role in the pathogenesis of pathological pain. Indeed, numerous studies employing gene deletion or pharmacological inhibition of PRRs successfully reversed or prevented pathological pain in experimental animal models. Furthermore, a number of preclinical studies have shown the therapeutic potential of targeting PRRs for chronic pain. Here, we review the current knowledge regarding the role of PRRs in chronic pain and discuss the promise and challenges of targeting PRRs as a novel therapeutic approach for chronic pain.
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Affiliation(s)
- Jungo Kato
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden.
| | - Nilesh M Agalave
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Camilla I Svensson
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
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