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Vitorakis N, Piperi C. Pivotal role of AGE-RAGE axis in brain aging with current interventions. Ageing Res Rev 2024; 100:102429. [PMID: 39032613 DOI: 10.1016/j.arr.2024.102429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 07/10/2024] [Accepted: 07/15/2024] [Indexed: 07/23/2024]
Abstract
Brain aging is characterized by several structural, biochemical and molecular changes which can vary among different individuals and can be influenced by genetic, environmental and lifestyle factors. Accumulation of protein aggregates, altered neurotransmitter composition, low-grade chronic inflammation and prolonged oxidative stress have been shown to contribute to brain tissue damage. Among key metabolic byproducts, advanced glycation end products (AGEs), formed endogenously through non-enzymatic reactions or acquired directly from the diet or other exogenous sources, have been detected to accumulate in brain tissue, exerting detrimental effects on cellular structure and function, contributing to neurodegeneration and cognitive decline. Upon binding to signal transduction receptor RAGE, AGEs can initiate pro-inflammatory pathways, exacerbate oxidative stress and neuroinflammation, thus impairing neuronal function and cognition. AGE-RAGE signaling induces programmed cell death, disrupts the blood-brain barrier and promotes protein aggregation, further compromising brain health. In this review, we investigate the intricate relationship between the AGE-RAGE pathway and brain aging in order to detect affected molecules and potential targets for intervention. Reduction of AGE deposition in brain tissue either through novel pharmacological therapeutics, dietary modifications, and lifestyle changes, shows a great promise in mitigating cognitive decline associated with brain aging.
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Affiliation(s)
- Nikolaos Vitorakis
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 75 M. Asias Street, Athens 11527, Greece
| | - Christina Piperi
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 75 M. Asias Street, Athens 11527, Greece.
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2
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Dou J, Zhang X, Hu C, Gao Y, Zhao Y, Hei M, Wang Z, Guo N, Zhu H. QKL injection ameliorates Alzheimer's disease-like pathology by regulating expression of RAGE. Exp Gerontol 2024; 190:112422. [PMID: 38599502 DOI: 10.1016/j.exger.2024.112422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/29/2024] [Accepted: 04/05/2024] [Indexed: 04/12/2024]
Abstract
The onset of Alzheimer's disease is related to neuron damage caused by massive deposition of Aβ in the brain. Recent studies suggest that excessive Aβ in the brain mainly comes from peripheral blood, and BBB is the key to regulate Aβ in and out of the brain. In this study, we explored the pathogenesis of AD from the perspective of Aβ transport through the BBB and the effect of QKL injection in AD mice. The results showed that QKL could improve the cognitive dysfunction of AD mice, decrease the level of Aβ and Aβ transporter-RAGE, which was supported by the results of network pharmacology, molecular docking and molecular dynamics simulation. In conclusion, RAGE is a potential target for QKL's therapeutic effect on AD.
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Affiliation(s)
- Jinfang Dou
- Beijing University of Chinese Medicine, Beijing, China
| | - Xin'ai Zhang
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Chaoqun Hu
- Beijing University of Chinese Medicine, Beijing, China
| | - Yuqian Gao
- Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Yue Zhao
- Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Murong Hei
- Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Zhimiao Wang
- Beijing University of Chinese Medicine, Beijing, China
| | - Nan Guo
- Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China.
| | - Haiyan Zhu
- Beijing University of Chinese Medicine, Beijing, China; Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China.
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3
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Yuan X, Liu J, Nie C, Ma Q, Wang C, Liu H, Chen Z, Zhang M, Li J. Comparative Study of the Effects of Dietary-Free and -Bound Nε-Carboxymethyllysine on Gut Microbiota and Intestinal Barrier. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:5014-5025. [PMID: 38388339 DOI: 10.1021/acs.jafc.3c09395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Nε-carboxymethyllysine (CML) is produced by a nonenzymatic reaction between reducing sugar and ε-amino group of lysine in food and exists as free and bound forms with varying digestibility and absorption properties in vivo, causing diverse interactions with gut microbiota. The effects of different forms of dietary CML on the gut microbiota and intestinal barrier of mice were explored. Mice were exposed to free and bound CML for 12 weeks, and colonic morphology, gut microbiota, fecal short-chain fatty acids (SCFAs), intestinal barrier, and receptor for AGE (RAGE) signaling cascades were measured. The results indicated that dietary-free CML increased the relative abundance of SCFA-producing genera including Blautia, Faecalibacterium, Agathobacter, and Roseburia. In contrast, dietary-bound CML mainly increased the relative abundance of Akkermansia. Moreover, dietary-free and -bound CML promoted the gene and protein expression of zonula occludens-1 and claudin-1. Additionally, the intake of free and bound CML caused an upregulation of RAGE expression but did not activate downstream inflammatory pathways due to the upregulation of oligosaccharyl transferase complex protein 48 (AGER1) expression, indicating a delicate balance between protective and proinflammatory effects in vivo. Dietary-free and -bound CML could modulate the gut microbiota community and increase tight-junction expression, and dietary-free CML might exert a higher potential benefit on gut microbiota and SCFAs than dietary-bound CML.
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Affiliation(s)
- Xiaojin Yuan
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Juan Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chenxi Nie
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Qingyu Ma
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chaoqi Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Huicui Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhifei Chen
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Min Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Juxiu Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
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Leung SS, Lenchik N, Mathews C, Pugliese A, McCarthy DA, Le Bagge S, Ewing A, Harris M, Radford KJ, Borg DJ, Gerling I, Forbes JM. Alpha cell receptor for advanced glycation end products associate with glucagon expression in type 1 diabetes. Sci Rep 2023; 13:12948. [PMID: 37558746 PMCID: PMC10412557 DOI: 10.1038/s41598-023-39243-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 07/21/2023] [Indexed: 08/11/2023] Open
Abstract
Hypoglycemia in type 1 diabetes associates with changes in the pancreatic islet α cells, where the receptor for advanced glycation end products (RAGE) is highly expressed. This study compared islet RAGE expression in donors without diabetes, those at risk of, and those with type 1 diabetes. Laser-dissected islets were subject to RNA bioinformatics and adjacent pancreatic tissue were assessed by confocal microscopy. We found that islets from type 1 diabetes donors had differential expression of the RAGE gene (AGER) and its correlated genes, based on glucagon expression. Random forest machine learning revealed that AGER was the most important predictor for islet glucagon levels. Conversely, a generalized linear model identified that glucagon expression could be predicted by expression of RAGE signaling molecules, its ligands and enzymes that create or clear RAGE ligands. Confocal imaging co-localized RAGE, its ligands and signaling molecules to the α cells. Half of the type 1 diabetes cohort comprised of adolescents and a patient with history of hypoglycemia-all showed an inverse relationship between glucagon and RAGE. These data confirm an association between glucagon and islet RAGE, its ligands and signaling pathways in type 1 diabetes, which warrants functional investigation into a role for RAGE in hypoglycemia.
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Affiliation(s)
- Sherman S Leung
- Glycation and Diabetes Complications, Mater Research Institute, Translational Research Institute (TRI), The University of Queensland (MRI-UQ), 37 Kent Street, Woolloongabba, Brisbane, QLD, 4102, Australia
- Faculty of Medicine, The University of Queensland, Brisbane, Australia
- School of Medicine and Dentistry, Griffith University, Brisbane, Australia
- Wesley Research Institute, The Wesley Hospital, Brisbane, Australia
| | - Nataliya Lenchik
- Division of Endocrinology, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Clayton Mathews
- Division of Endocrinology, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Alberto Pugliese
- Division of Endocrinology, Department of Microbiology and Immunology, Department of Medicine, Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Domenica A McCarthy
- Glycation and Diabetes Complications, Mater Research Institute, Translational Research Institute (TRI), The University of Queensland (MRI-UQ), 37 Kent Street, Woolloongabba, Brisbane, QLD, 4102, Australia
- Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Selena Le Bagge
- Glycation and Diabetes Complications, Mater Research Institute, Translational Research Institute (TRI), The University of Queensland (MRI-UQ), 37 Kent Street, Woolloongabba, Brisbane, QLD, 4102, Australia
- Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Adam Ewing
- Faculty of Medicine, The University of Queensland, Brisbane, Australia
- Translational Bioinformatics Group, MRI-UQ, TRI, Brisbane, Australia
| | - Mark Harris
- Faculty of Medicine, The University of Queensland, Brisbane, Australia
- Queensland Diabetes Centre, Mater Health Services, Brisbane, Australia
| | - Kristen J Radford
- Faculty of Medicine, The University of Queensland, Brisbane, Australia
- Cancer Immunotherapies Group, MRI-UQ, TRI, Brisbane, Australia
| | - Danielle J Borg
- Glycation and Diabetes Complications, Mater Research Institute, Translational Research Institute (TRI), The University of Queensland (MRI-UQ), 37 Kent Street, Woolloongabba, Brisbane, QLD, 4102, Australia
- Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Ivan Gerling
- Division of Endocrinology, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Josephine M Forbes
- Glycation and Diabetes Complications, Mater Research Institute, Translational Research Institute (TRI), The University of Queensland (MRI-UQ), 37 Kent Street, Woolloongabba, Brisbane, QLD, 4102, Australia.
- Faculty of Medicine, The University of Queensland, Brisbane, Australia.
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Kim CH, Kang HY, Kim G, Park J, Nam BY, Park JT, Han SH, Kang SW, Yoo TH. Soluble receptors for advanced glycation end-products prevent unilateral ureteral obstruction-induced renal fibrosis. Front Pharmacol 2023; 14:1172269. [PMID: 37261287 PMCID: PMC10227196 DOI: 10.3389/fphar.2023.1172269] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/09/2023] [Indexed: 06/02/2023] Open
Abstract
Introduction: The receptor for advanced glycation end products (RAGE) and its ligands, such as high-mobility group protein box 1 (HMGB1), play an important role in the accumulation of extracellular matrix in chronic kidney diseases with tubulointerstitial fibrosis. Blocking RAGE signaling with soluble RAGE (sRAGE) is a therapeutic candidate for renal fibrosis. Methods: NRK-52E cells were stimulated with or without HMGB1 and incubated with sRAGE in vitro. Sprague-Dawley rats were intraperitoneally treated with sRAGE after unilateral ureteral obstruction (UUO) operation in vivo. Results: HMBG1-stimulated NRK-52E cells showed increased fibronectin expression, type I collagen, α-smooth muscle actin, and connective tissue growth factor, which were attenuated by sRAGE. The mitogen-activated protein kinase (MAPK) pathway and nuclear translocation of nuclear factor kappa B (NF-κB) were enhanced in NRK-52E cells exposed to HMBG1, and sRAGE treatment alleviated the activation of the MAPK and NF-κB pathways. In the UUO rat models, sRAGE significantly ameliorated the increased renal fibronectin, type I collagen, and α-smooth muscle actin expressions. Masson's trichrome staining confirmed the anti-fibrotic effect of sRAGE in the UUO rat model. RAGE also significantly attenuated the activation of the MAPK pathway and NF-κB, as well as the increased number of infiltrated macrophages within the tubulointerstitium in the kidney of the UUO rat models. Conclusion: These findings suggest that RAGE plays a pivotal role in the pathogenesis of renal fibrosis and that its inhibition by sRAGE may be a potential therapeutic approach for renal fibrosis.
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Affiliation(s)
- Chan Ho Kim
- Department of Internal Medicine, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, Incheon, Republic of Korea
| | - Hye-Young Kang
- Department of Internal Medicine, College of Medicine, Severance Biomedical Science Institute, Brain Korea 21 Project for Medical Science, Yonsei University, Seoul, Republic of Korea
| | - Gyuri Kim
- Department of Internal Medicine, College of Medicine, Severance Biomedical Science Institute, Institute of Kidney Disease Research, Yonsei University, Seoul, Republic of Korea
| | - Jimin Park
- Department of Internal Medicine, College of Medicine, Severance Biomedical Science Institute, Institute of Kidney Disease Research, Yonsei University, Seoul, Republic of Korea
| | - Bo Young Nam
- Department of Internal Medicine, College of Medicine, Severance Biomedical Science Institute, Institute of Kidney Disease Research, Yonsei University, Seoul, Republic of Korea
| | - Jung Tak Park
- Department of Internal Medicine, College of Medicine, Severance Biomedical Science Institute, Institute of Kidney Disease Research, Yonsei University, Seoul, Republic of Korea
| | - Seung Hyeok Han
- Department of Internal Medicine, College of Medicine, Severance Biomedical Science Institute, Institute of Kidney Disease Research, Yonsei University, Seoul, Republic of Korea
| | - Shin-Wook Kang
- Department of Internal Medicine, College of Medicine, Severance Biomedical Science Institute, Institute of Kidney Disease Research, Yonsei University, Seoul, Republic of Korea
| | - Tae-Hyun Yoo
- Department of Internal Medicine, College of Medicine, Severance Biomedical Science Institute, Institute of Kidney Disease Research, Yonsei University, Seoul, Republic of Korea
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RAGE signaling pathway is involved in CUS-induced depression-like behaviors by regulating the expression of NR2A and NR2B in rat hippocampus DG. Exp Neurol 2023; 361:114299. [PMID: 36521778 DOI: 10.1016/j.expneurol.2022.114299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 11/26/2022] [Accepted: 12/10/2022] [Indexed: 12/14/2022]
Abstract
NMDA receptors play pivotal roles in the neurobiology of chronic stress-induced mood disorders. But the mechanism for chronic stress to disturb the expression of NMDA receptor subunits is still unclear. Recent researches indicated the involvement RAGE signaling pathway in regulation of glutamate system functions. In this study, we hypothesized RAGE signaling pathway mediated chronic stress-induced alteration in the expression of NMDA receptor subunits, leading to depressive-like behaviors. CUS decreased the expression of RAGE, NR2A, and NR2B, inhibited the phosphorylation of transcript factor ERK and CREB in rat hippocampus DG. RAGE knockdown in hippocampus DG by RAGE shRNA lentiviral particles induced depressive-like behaviors, reduced the mRNA and protein expression of NR2A and NR2B, and inhibited the phosphorylation of ERK and CREB. RAGE over-expression in hippocampus DG by RAGE adenovirus particles reversed the effects of CUS on depressive-like behaviors, ERK and CREB phosphorylation, and NR2A and NR2B expression. Our findings suggests that RAGE signaling pathway at least partially participates in the regulation of NR2A and NR2B expression, which mediates the effects of chronic stress on the depressive-like behaviors. These data provide evidence for RAGE signaling as a possible new pathway through which chronic stress results in the maladaptation of NMDA receptors.
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Bangar NS, Gvalani A, Ahmad S, Khan MS, Tupe RS. Understanding the role of glycation in the pathology of various non-communicable diseases along with novel therapeutic strategies. Glycobiology 2022; 32:1068-1088. [PMID: 36074518 DOI: 10.1093/glycob/cwac060] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 08/10/2022] [Accepted: 09/02/2022] [Indexed: 01/07/2023] Open
Abstract
Glycation refers to carbonyl group condensation of the reducing sugar with the free amino group of protein, which forms Amadori products and advanced glycation end products (AGEs). These AGEs alter protein structure and function by configuring a negative charge on the positively charged arginine and lysine residues. Glycation plays a vital role in the pathogenesis of metabolic diseases, brain disorders, aging, and gut microbiome dysregulation with the aid of 3 mechanisms: (i) formation of highly reactive metabolic pathway-derived intermediates, which directly affect protein function in cells, (ii) the interaction of AGEs with its associated receptors to create oxidative stress causing the activation of transcription factor NF-κB, and (iii) production of extracellular AGEs hinders interactions between cellular and matrix molecules affecting vascular and neural genesis. Therapeutic strategies are thus required to inhibit glycation at different steps, such as blocking amino and carbonyl groups, Amadori products, AGEs-RAGE interactions, chelating transition metals, scavenging free radicals, and breaking crosslinks formed by AGEs. The present review focused on explicitly elaborating the impact of glycation-influenced molecular mechanisms in developing and treating noncommunicable diseases.
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Affiliation(s)
- Nilima S Bangar
- Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Armaan Gvalani
- Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Saheem Ahmad
- Department of Medical Laboratory Sciences, University of Hail, Hail City 2440, Saudi Arabia
| | - Mohd S Khan
- Department of Biochemistry, Protein Research Chair, King Saud University, Riyadh 11451, Saudi Arabia
| | - Rashmi S Tupe
- Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
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A highly effective and stable butyrylcholinesterase inhibitor with multi-faceted neuroprotection and cognition improvement. Eur J Med Chem 2022; 239:114510. [DOI: 10.1016/j.ejmech.2022.114510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/30/2022] [Accepted: 05/31/2022] [Indexed: 11/23/2022]
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Steenbeke M, Speeckaert R, Desmedt S, Glorieux G, Delanghe JR, Speeckaert MM. The Role of Advanced Glycation End Products and Its Soluble Receptor in Kidney Diseases. Int J Mol Sci 2022; 23:ijms23073439. [PMID: 35408796 PMCID: PMC8998875 DOI: 10.3390/ijms23073439] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 03/20/2022] [Accepted: 03/21/2022] [Indexed: 02/06/2023] Open
Abstract
Patients with chronic kidney disease (CKD) are more prone to oxidative stress and chronic inflammation, which may lead to an increase in the synthesis of advanced glycation end products (AGEs). Because AGEs are mostly removed by healthy kidneys, AGE accumulation is a result of both increased production and decreased kidney clearance. On the other hand, AGEs may potentially hasten decreasing kidney function in CKD patients, and are independently related to all-cause mortality. They are one of the non-traditional risk factors that play a significant role in the underlying processes that lead to excessive cardiovascular disease in CKD patients. When AGEs interact with their cell-bound receptor (RAGE), cell dysfunction is initiated by activating nuclear factor kappa-B (NF-κB), increasing the production and release of inflammatory cytokines. Alterations in the AGE-RAGE system have been related to the development of several chronic kidney diseases. Soluble RAGE (sRAGE) is a decoy receptor that suppresses membrane-bound RAGE activation and AGE-RAGE-related toxicity. sRAGE, and more specifically, the AGE/sRAGE ratio, may be promising tools for predicting the prognosis of kidney diseases. In the present review, we discuss the potential role of AGEs and sRAGE as biomarkers in different kidney pathologies.
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Affiliation(s)
- Mieke Steenbeke
- Nephrology Unit, Department of Internal Medicine and Pediatrics, Ghent University Hospital, 9000 Ghent, Belgium; (M.S.); (S.D.); (G.G.)
| | - Reinhart Speeckaert
- Department of Dermatology, Ghent University Hospital, 9000 Ghent, Belgium;
- Research Foundation Flanders, 1000 Brussels, Belgium
| | - Stéphanie Desmedt
- Nephrology Unit, Department of Internal Medicine and Pediatrics, Ghent University Hospital, 9000 Ghent, Belgium; (M.S.); (S.D.); (G.G.)
| | - Griet Glorieux
- Nephrology Unit, Department of Internal Medicine and Pediatrics, Ghent University Hospital, 9000 Ghent, Belgium; (M.S.); (S.D.); (G.G.)
| | - Joris R. Delanghe
- Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium;
| | - Marijn M. Speeckaert
- Nephrology Unit, Department of Internal Medicine and Pediatrics, Ghent University Hospital, 9000 Ghent, Belgium; (M.S.); (S.D.); (G.G.)
- Research Foundation Flanders, 1000 Brussels, Belgium
- Correspondence:
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Li J, Zeng Q, Su W, Song M, Xie M, Mao L. FBXO10 prevents chronic unpredictable stress-induced behavioral despair and cognitive impairment through promoting RAGE degradation. CNS Neurosci Ther 2021; 27:1504-1517. [PMID: 34492157 PMCID: PMC8611766 DOI: 10.1111/cns.13727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 08/13/2021] [Accepted: 08/27/2021] [Indexed: 12/15/2022] Open
Abstract
Aims Depression is one of the leading causes of disability worldwide. The receptor for advanced glycosylation end products (RAGE) is closely related to chronic stress and is a target of F‐box protein O10 (FBXO10) which promotes the degradation of RAGE by ubiquitination. Here, we explored the role of FBXO10 and RAGE in chronic unpredictable stress (CUS)‐induced behavioral despair, cognitive impairment, neuroinflammation, and the polarization microglia. Methods Male C57BL/6 mice with or without infusion of viral in the medial prefrontal cortex (PFC) were subjected to CUS. Then the mice were exposed to forced swim test, sucrose consumption test, novelty‐suppressed feeding test, and temporal object recognition task to assess the behavioral despair and cognitive impairment. Inflammatory cytokines and the neurotrophic factor brain‐derived neurotrophic factor (BDNF) levels in PFC were assessed by enzyme‐linked immunosorbent assay. Immunofluorescence and immunohistochemistry staining were performed to observe the activation and phenotypic transformation of microglia in PFC. LPS‐induced cell model was constructed to explore the effect of FBXO10/RAGE axis in the polarization of microglia in vitro. Results FBXO10 promoted RAGE degradation by ubiquitination in BV2 cells. FBXO10 protein levels were reduced whereas RAGE protein levels were enhanced in CUS mice. FBXO10 overexpression or RAGE knockdown inhibited proinflammatory cytokine release, promoted BDNF expression, mitigated the depressive‐like and cognitive impairment behaviors, and affected the polarization of microglia induced by CUS exposure. FBXO10/RAGE axis promoted the polarization of microglia from the M1 to the M2 phenotype in vitro. Moreover, p38 MAPK and NF‐κΒ were identified to be the downstream effect factors for FBXO10/RAGE axis. Conclusions FBXO10 administration prevents CUS‐induced behavioral despair, cognitive impairment, neuroinflammation, and the polarization of microglia through decreasing the accumulation of RAGE, p38 MAPK, and NF‐κΒ, suggesting potential therapeutic strategies for the prevention and treatment of depression.
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Affiliation(s)
- Jiacen Li
- Department of Anesthesiology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China.,Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China
| | - Qingcui Zeng
- Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China.,Geriatric Intensive Care Unit, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Wenjie Su
- Department of Anesthesiology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China.,Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China
| | - Menglong Song
- Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China.,Emergency Intensive Care Unit, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Min Xie
- Department of Anesthesiology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China.,Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China
| | - Lei Mao
- Department of Anesthesiology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China.,Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China
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11
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Molecular Characteristics of RAGE and Advances in Small-Molecule Inhibitors. Int J Mol Sci 2021; 22:ijms22136904. [PMID: 34199060 PMCID: PMC8268101 DOI: 10.3390/ijms22136904] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/22/2021] [Accepted: 06/24/2021] [Indexed: 12/16/2022] Open
Abstract
Receptor for advanced glycation end-products (RAGE) is a member of the immunoglobulin superfamily. RAGE binds and mediates cellular responses to a range of DAMPs (damage-associated molecular pattern molecules), such as AGEs, HMGB1, and S100/calgranulins, and as an innate immune sensor, can recognize microbial PAMPs (pathogen-associated molecular pattern molecules), including bacterial LPS, bacterial DNA, and viral and parasitic proteins. RAGE and its ligands stimulate the activations of diverse pathways, such as p38MAPK, ERK1/2, Cdc42/Rac, and JNK, and trigger cascades of diverse signaling events that are involved in a wide spectrum of diseases, including diabetes mellitus, inflammatory, vascular and neurodegenerative diseases, atherothrombosis, and cancer. Thus, the targeted inhibition of RAGE or its ligands is considered an important strategy for the treatment of cancer and chronic inflammatory diseases.
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12
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Structural Studies Providing Insights into Production and Conformational Behavior of Amyloid-β Peptide Associated with Alzheimer's Disease Development. MOLECULES (BASEL, SWITZERLAND) 2021; 26:molecules26102897. [PMID: 34068293 PMCID: PMC8153327 DOI: 10.3390/molecules26102897] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/06/2021] [Accepted: 05/11/2021] [Indexed: 12/18/2022]
Abstract
Alzheimer's disease is the most common type of neurodegenerative disease in the world. Genetic evidence strongly suggests that aberrant generation, aggregation, and/or clearance of neurotoxic amyloid-β peptides (Aβ) triggers the disease. Aβ accumulates at the points of contact of neurons in ordered cords and fibrils, forming the so-called senile plaques. Aβ isoforms of different lengths are found in healthy human brains regardless of age and appear to play a role in signaling pathways in the brain and to have neuroprotective properties at low concentrations. In recent years, different substances have been developed targeting Aβ production, aggregation, interaction with other molecules, and clearance, including peptide-based drugs. Aβ is a product of sequential cleavage of the membrane glycoprotein APP (amyloid precursor protein) by β- and γ-secretases. A number of familial mutations causing an early onset of the disease have been identified in the APP, especially in its transmembrane domain. The mutations are reported to influence the production, oligomerization, and conformational behavior of Aβ peptides. This review highlights the results of structural studies of the main proteins involved in Alzheimer's disease pathogenesis and the molecular mechanisms by which perspective therapeutic substances can affect Aβ production and nucleation.
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Yang F, Wang H, Chen H, Ran D, Tang Q, Weng P, Sun Y, Jiang W. RAGE Signaling pathway in hippocampus dentate gyrus involved in GLT-1 decrease induced by chronic unpredictable stress in rats. Brain Res Bull 2020; 163:49-56. [PMID: 32621862 DOI: 10.1016/j.brainresbull.2020.06.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 06/17/2020] [Accepted: 06/28/2020] [Indexed: 11/26/2022]
Abstract
A pivotal role of glutamatergic neurotransmission in the pathophysiology of major depressive disorder (MDD) has been supported in preclinical and clinical studies. Glutamate transporters are responsible for rapid uptake of glutamate to maintain glutamate homeostasis. Down-regulation of glutamate transporters has been reported in MDD patients and animal models. However, the mechanism for stress-induced modulation of glutamate transporter expression is poorly understood. Receptor for advanced glycosylation end products (RAGE), a member of immunoglobulin family, is found expressed widely in brain and play important roles in neuronal development, neurite growth, neurogenesis and neuroinflammation. Our study showed chronic unpredictable stress (CUS) induced depressive-like behaviors and reduced RAGE expression in hippocampus DG, CA1 and CA3 areas. The protein levels of GLT-1, p-CREB and p-p65 decreased in hippocampus DG as well. Knockdown of RAGE expression in hippocampus DG with RAGE shRNA lentivirus particles induced depressive-like behaviors. Meanwhile, the protein and mRNA levels of GLT-1 were significantly decreased as well as phosphorylation of CREB and p65. Neither CUS nor RAGE knockdown altered GLAST protein and mRNA levels. These findings suggested that RAGE/CREB-NF-κB signaling pathway in hippocampus DG involved in modulation of GLT-1 expression, which possibly contributed to the depressive-like behavior induced by CUS.
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Affiliation(s)
- Fang Yang
- Key Laboratory of Molecular and Biochemical Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Hong Wang
- Key Laboratory of Molecular and Biochemical Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Huali Chen
- Key Laboratory of Molecular and Biochemical Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Dongzhi Ran
- Key Laboratory of Molecular and Biochemical Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Qiang Tang
- Key Laboratory of Molecular and Biochemical Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Ping Weng
- Key Laboratory of Molecular and Biochemical Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Yuzhuo Sun
- Key Laboratory of Molecular and Biochemical Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Wengao Jiang
- Key Laboratory of Molecular and Biochemical Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing, China.
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14
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Walley KR. Discovering Causal Mechanistic Pathways in Sepsis-associated Acute Respiratory Distress Syndrome. Am J Respir Crit Care Med 2020; 201:2-4. [PMID: 31545649 PMCID: PMC6938151 DOI: 10.1164/rccm.201909-1772ed] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Keith R Walley
- Centre for Heart Lung InnovationUniversity of British ColumbiaVancouver, Canada
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15
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Elamin AA, Klunkelfuß S, Kämpfer S, Oehlmann W, Stehr M, Smith C, Simpson GR, Morgan R, Pandha H, Singh M. A Specific Blood Signature Reveals Higher Levels of S100A12: A Potential Bladder Cancer Diagnostic Biomarker Along With Urinary Engrailed-2 Protein Detection. Front Oncol 2020; 9:1484. [PMID: 31993369 PMCID: PMC6962349 DOI: 10.3389/fonc.2019.01484] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 12/10/2019] [Indexed: 12/13/2022] Open
Abstract
Urothelial carcinoma of the urinary bladder (UCB) or bladder cancer remains a major health problem with high morbidity and mortality rates, especially in the western world. UCB is also associated with the highest cost per patient. In recent years numerous markers have been evaluated for suitability in UCB detection and surveillance. However, to date none of these markers can replace or even reduce the use of routine tools (cytology and cystoscopy). Our current study described UCB's extensive expression profile and highlighted the variations with normal bladder tissue. Our data revealed that JUP, PTGDR, KLRF1, MT-TC, and RNU6-135P are associated with prognosis in patients with UCB. The microarray expression data identified also S100A12, S100A8, and NAMPT as potential UCB biomarkers. Pathway analysis revealed that natural killer cell mediated cytotoxicity is the most involved pathway. Our analysis showed that S100A12 protein may be useful as a biomarker for early UCB detection. Plasma S100A12 has been observed in patients with UCB with an overall sensitivity of 90.5% and a specificity of 75%. S100A12 is highly expressed preferably in high-grade and high-stage UCB. Furthermore, using a panel of more than hundred urine samples, a prototype lateral flow test for the transcription factor Engrailed-2 (EN2) also showed reasonable sensitivity (85%) and specificity (71%). Such findings provide confidence to further improve and refine the EN2 rapid test for use in clinical practice. In conclusion, S100A12 and EN2 have shown potential value as biomarker candidates for UCB patients. These results can speed up the discovery of biomarkers, improving diagnostic accuracy and may help the management of UCB.
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Affiliation(s)
- Ayssar A Elamin
- LIONEX Diagnostics and Therapeutics GmbH, Brunswick, Germany
| | | | - Susanne Kämpfer
- LIONEX Diagnostics and Therapeutics GmbH, Brunswick, Germany
| | - Wulf Oehlmann
- LIONEX Diagnostics and Therapeutics GmbH, Brunswick, Germany
| | - Matthias Stehr
- LIONEX Diagnostics and Therapeutics GmbH, Brunswick, Germany
| | - Christopher Smith
- Department of Oncology, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Guy R Simpson
- Department of Oncology, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Richard Morgan
- Institute of Cancer Therapeutics, Faculty of Life Sciences, University of Bradford, Bradford, United Kingdom
| | - Hardev Pandha
- Department of Oncology, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Mahavir Singh
- LIONEX Diagnostics and Therapeutics GmbH, Brunswick, Germany
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16
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Jones TK, Feng R, Kerchberger VE, Reilly JP, Anderson BJ, Shashaty MGS, Wang F, Dunn TG, Riley TR, Abbott J, Ittner CAG, Christiani DC, Mikacenic C, Wurfel MM, Ware LB, Calfee CS, Matthay MA, Christie JD, Meyer NJ. Plasma sRAGE Acts as a Genetically Regulated Causal Intermediate in Sepsis-associated Acute Respiratory Distress Syndrome. Am J Respir Crit Care Med 2020; 201:47-56. [PMID: 31487195 PMCID: PMC6938154 DOI: 10.1164/rccm.201810-2033oc] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Accepted: 09/05/2019] [Indexed: 12/31/2022] Open
Abstract
Rationale: Acute respiratory distress syndrome (ARDS) lacks known causal biomarkers. Plasma concentrations of sRAGE (soluble receptor for advanced glycation end products) strongly associate with ARDS risk. However, whether plasma sRAGE contributes causally to ARDS remains unknown.Objectives: Evaluate plasma sRAGE as a causal intermediate in ARDS by Mendelian randomization (MR), a statistical method to infer causality using observational data.Methods: We measured early plasma sRAGE in two critically ill populations with sepsis. The cohorts were whole-genome genotyped and phenotyped for ARDS. To select validated genetic instruments for MR, we regressed plasma sRAGE on genome-wide genotypes in both cohorts. The causal effect of plasma sRAGE on ARDS was inferred using the top variants with significant associations in both populations (P < 0.01, R2 > 0.02). We applied the inverse variance-weighted method to obtain consistent estimates of the causal effect of plasma sRAGE on ARDS risk.Measurements and Main Results: There were 393 European and 266 African ancestry patients in the first cohort and 843 European ancestry patients in the second cohort. Plasma sRAGE was strongly associated with ARDS risk in both populations (odds ratio, 1.86; 95% confidence interval [1.54-2.25]; 2.56 [2.14-3.06] per log increase). Using genetic instruments common to both populations, plasma sRAGE had a consistent causal effect on ARDS risk with a β estimate of 0.50 (95% confidence interval [0.09-0.91] per log increase).Conclusions: Plasma sRAGE is genetically regulated during sepsis, and MR analysis indicates that increased plasma sRAGE leads to increased ARDS risk, suggesting plasma sRAGE acts as a causal intermediate in sepsis-related ARDS.
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Affiliation(s)
- Tiffanie K. Jones
- Pulmonary, Allergy, and Critical Care Medicine Division, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Rui Feng
- Department of Biostatistics, Center for Clinical Epidemiology and Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - V. Eric Kerchberger
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - John P. Reilly
- Pulmonary, Allergy, and Critical Care Medicine Division, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Brian J. Anderson
- Pulmonary, Allergy, and Critical Care Medicine Division, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Michael G. S. Shashaty
- Pulmonary, Allergy, and Critical Care Medicine Division, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
- Department of Biostatistics, Center for Clinical Epidemiology and Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Fan Wang
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner Research Institute, Cleveland, Ohio
| | - Thomas G. Dunn
- Pulmonary, Allergy, and Critical Care Medicine Division, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Thomas R. Riley
- Pulmonary, Allergy, and Critical Care Medicine Division, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Jason Abbott
- Department of Anesthesia, Cardiovascular Research Institute, and
| | - Caroline A. G. Ittner
- Pulmonary, Allergy, and Critical Care Medicine Division, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - David C. Christiani
- Harvard School of Public Health, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts; and
| | - Carmen Mikacenic
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of Washington, Seattle, Washington
| | - Mark M. Wurfel
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of Washington, Seattle, Washington
| | - Lorraine B. Ware
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Carolyn S. Calfee
- Division of Pulmonary and Critical Care Medicine, University of California, San Francisco, California
| | - Michael A. Matthay
- Department of Anesthesia, Cardiovascular Research Institute, and
- Division of Pulmonary and Critical Care Medicine, University of California, San Francisco, California
| | - Jason D. Christie
- Pulmonary, Allergy, and Critical Care Medicine Division, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
- Department of Biostatistics, Center for Clinical Epidemiology and Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Nuala J. Meyer
- Pulmonary, Allergy, and Critical Care Medicine Division, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
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17
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Prasad K. AGE-RAGE Stress in the Pathophysiology of Atrial Fibrillation and Its Treatment. Int J Angiol 2019; 29:72-80. [PMID: 32476808 DOI: 10.1055/s-0039-3400541] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Atrial fibrillation (AF) is the most common of cardiac arrhythmias. Mechanisms such as atrial structural remodeling and electrical remodeling have been implicated in the pathogenesis of AF. The data to date suggest that advanced glycation end products (AGEs) and its cell receptor RAGE (receptor for AGE) and soluble receptor (sRAGE) are involved in the pathogenesis of AF. This review focuses on the role of AGE-RAGE axis in the pathogenesis of AF. Interaction of AGE with RAGE generates reactive oxygen species, cytokines, and vascular cell adhesion molecules. sRAGE is a cytoprotective agent. The data show that serum levels of AGE and sRAGE, and expression of RAGE, are elevated in AF patients. Elevated levels of sRAGE did not protect the development of AF. This might be due to greater elevation of AGE than sRAGE. Measurement of AGE-RAGE stress (AGE/sRAGE) would be appropriate as compared with measurement of AGE or RAGE or sRAGE alone in AF patients. AGE and its interaction with RAGE can induce AF through alteration in cellular protein and extracellular matrix. AGE and its interaction with RAGE induce atrial structural and electrical remodeling. The treatment strategy should be directed toward reduction in AGE levels, suppression of RAGE expression, blocking of binding of AGE to RAGE, and elevation of sRAGE and antioxidants. In conclusion, AGE-RAGE axis is involved in the development of AF through atrial structural and electrical remodeling. The treatment modalities for AF should include lowering of AGE, suppression of RAGE, elevation of sRAGE, and use of antioxidants.
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Affiliation(s)
- Kailash Prasad
- Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatchewan, Saskatoon, Canada
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18
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Kumar NP, Moideen K, Nancy A, Viswanathan V, Shruthi BS, Sivakumar S, Hissar S, Kornfeld H, Babu S. Systemic RAGE ligands are upregulated in tuberculosis individuals with diabetes co-morbidity and modulated by anti-tuberculosis treatment and metformin therapy. BMC Infect Dis 2019; 19:1039. [PMID: 31818258 PMCID: PMC6902343 DOI: 10.1186/s12879-019-4648-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 11/22/2019] [Indexed: 12/17/2022] Open
Abstract
Background Ligands of the receptor for advanced glycation end products (RAGE) are key signalling molecules in the innate immune system but their role in tuberculosis-diabetes comorbidity (TB-DM) has not been investigated. Methods We examined the systemic levels of soluble RAGE (sRAGE), advanced glycation end products (AGE), S100A12 and high mobility group box 1 (HMGB1) in participants with either TB-DM, TB, DM or healthy controls (HC). Results Systemic levels of AGE, sRAGE and S100A12 were significantly elevated in TB-DM and DM in comparison to TB and HC. During follow up, AGE, sRAGE and S100A12 remained significantly elevated in TB-DM compared to TB at 2nd month and 6th month of anti-TB treatment (ATT). RAGE ligands were increased in TB-DM individuals with bilateral and cavitary disease. sRAGE and S100A12 correlated with glycated hemoglobin levels. Within the TB-DM group, those with known diabetes (KDM) revealed significantly increased levels of AGE and sRAGE compared to newly diagnosed DM (NDM). KDM participants on metformin treatment exhibited significantly diminished levels of AGE and sRAGE in comparison to those on non-metformin regimens. Conclusions Our data demonstrate that RAGE ligand levels reflect disease severity and extent in TB-DM, distinguish KDM from NDM and are modulated by metformin therapy.
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Affiliation(s)
- Nathella Pavan Kumar
- National Institutes of Health-NIRT- International Center for Excellence in Research, No. 1 Mayor Sathyamoothy Road, Chetpet, Chennai, India.
| | - Kadar Moideen
- National Institutes of Health-NIRT- International Center for Excellence in Research, No. 1 Mayor Sathyamoothy Road, Chetpet, Chennai, India
| | - Arul Nancy
- National Institutes of Health-NIRT- International Center for Excellence in Research, No. 1 Mayor Sathyamoothy Road, Chetpet, Chennai, India.,Prof. M. Viswanathan Diabetes Research Center, Chennai, India
| | | | | | | | - Syed Hissar
- National Institute for Research in Tuberculosis, Chennai, India
| | - Hardy Kornfeld
- University of Massachusetts Medical School, Worcester, MA, USA
| | - Subash Babu
- National Institutes of Health-NIRT- International Center for Excellence in Research, No. 1 Mayor Sathyamoothy Road, Chetpet, Chennai, India.,LPD, NIAID, NIH, Bethesda, MD, USA
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19
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AGE-RAGE stress: a changing landscape in pathology and treatment of Alzheimer's disease. Mol Cell Biochem 2019; 459:95-112. [PMID: 31079281 DOI: 10.1007/s11010-019-03553-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 05/04/2019] [Indexed: 12/27/2022]
Abstract
Numerous hypotheses including amyloid cascade, cholinergic, and oxidative have been proposed for pathogenesis of Alzheimer's disease (AD). The data suggest that advanced glycation end products (AGEs) and its receptor RAGE (receptor for AGE) are involved in the pathogenesis of AD. AGE-RAGE stress, defined as a balance between stressors (AGE, RAGE) and anti-stressors (sRAGE, AGE degraders) in favor of stressors, has been implicated in pathogenesis of diseases. AGE and its interaction with RAGE-mediated increase in the reactive oxygen species (ROS) damage brain because of its increased vulnerability to ROS. AGE and ROS increase the synthesis of amyloid β (Aβ) leading to deposition of Aβ and phosphorylation of tau, culminating in formation of plaques and neurofibrillary tangles. ROS increase the synthesis of Aβ, high-mobility group box 1(HMGB1), and S100 that interacts with RAGE to produce additional ROS resulting in enhancement of AD pathology. Elevation of ROS precedes the Aβ plaques formation. Because of involvement of AGE and RAGE in AD pathology, the treatment should be targeted at lowering AGE levels through reduction in consumption and formation of AGE, and lowering expression of RAGE, blocking of RAGE ligand binding, increasing levels of soluble RAGE (sRAGE), and use of antioxidants. The above treatment aspect of AD is lacking. In conclusion, AGE-RAGE stress initiates, and Aβ, HMGB1, and S100 enhance the progression of AD. Reduction of levels of AGE and RAGE, elevation of sRAGE, and antioxidants would be beneficial therapeutic modalities in the prevention, regression, and slowing of progression of AD.
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20
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Charoenpong H, Osathanon T, Pavasant P, Limjeerajarus N, Keawprachum B, Limjeerajarus CN, Cheewinthamrongrod V, Palaga T, Lertchirakarn V, Ritprajak P. Mechanical stress induced S100A7 expression in human dental pulp cells to augment osteoclast differentiation. Oral Dis 2019; 25:812-821. [PMID: 30614184 DOI: 10.1111/odi.13033] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 10/02/2018] [Accepted: 10/22/2018] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Mechanical injury of dental pulp leads to root resorption by osteoclasts/odontoclasts. S100 proteins have been demonstrated to be involved in inflammatory processes and bone remodeling. This study aimed to investigate the effect of mechanical stress on S100A7 expression by human dental pulp cells (HDPCs) and the effect of S100A7 proteins on osteoclast differentiation. MATERIALS AND METHODS Isolated HDPCs were stimulated with compressive loading (2 and 6 hr), or shear loading (2, 6, and 16 hr). S100 mRNA expression and S100A7 protein levels were determined by real-time PCR and ELISA, respectively. Osteoclast differentiation was analyzed using primary human monocytes. The differentiation and activity of osteoclasts were examined by TRAcP staining and dentine resorption. In addition, the expression of S100A7 was analyzed in pulp tissues obtained from orthodontically treated teeth. RESULTS Compressive and shear mechanical stress significantly upregulated both mRNA and protein level of S100A7. Dental pulp tissues from orthodontically treated teeth exhibited higher S100A7mRNA levels compared to non-treated control teeth. S100A7 promoted osteoclast differentiation by primary human monocytes. Moreover, S100A7 significantly enhanced dentine resorption by these cells. CONCLUSIONS Mechanical stress induced expression of S100A7 by human dental pulp cells and this may promote root resorption by inducing osteoclast differentiation and activity.
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Affiliation(s)
- Hataichanok Charoenpong
- Graduate Program in Oral Biology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Thanaphum Osathanon
- Excellence Center in Regenerative Dentistry and Department of Anatomy, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Prasit Pavasant
- Excellence Center in Regenerative Dentistry and Department of Anatomy, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Nuttapol Limjeerajarus
- Research Center for Advanced Energy Technology, Faculty of Engineering, Thai-Nichi Institute of Technology, Bangkok, Thailand
| | - Boonrit Keawprachum
- Research Center for Advanced Energy Technology, Faculty of Engineering, Thai-Nichi Institute of Technology, Bangkok, Thailand
| | - Chalida N Limjeerajarus
- Excellence Center in Regenerative Dentistry and Department of Anatomy, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.,Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | | | - Tanapat Palaga
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Veera Lertchirakarn
- Research Unit on Oral Microbiology and Immunology and Department of Microbiology and Immunology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Patcharee Ritprajak
- Oral Biology Research Center, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.,Research Unit on Oral Microbiology and Immunology and Department of Microbiology and Immunology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
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21
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Abstract
High-mobility group box 1 (HMGB1) is one of the most abundant proteins in eukaryotes and the best characterized damage-associated molecular pattern (DAMP). The biological activities of HMGB1 depend on its subcellular location, context and post-translational modifications. Inside the nucleus, HMGB1 is engaged in many DNA events such as DNA repair, transcription regulation and genome stability; in the cytoplasm, its main function is to regulate the autophagic flux while in the extracellular environment, it possesses more complicated functions and it is involved in a large variety of different processes such as inflammation, migration, invasion, proliferation, differentiation and tissue regeneration. Due to this pleiotropy, the role of HMGB1 has been vastly investigated in various pathological diseases and a large number of studies have explored its function in cardiovascular pathologies. However, in this contest, the precise mechanism of action of HMGB1 and its therapeutic potential are still very controversial since is debated whether HMGB1 is involved in tissue damage or plays a role in tissue repair and regeneration. The main focus of this review is to provide an overview of the effects of HMGB1 in different ischemic heart diseases and to discuss its functions in these pathological conditions.
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22
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The marine natural product Scalarin inhibits the receptor for advanced glycation end products (RAGE) and autophagy in the PANC-1 and MIA PaCa-2 pancreatic cancer cell lines. Invest New Drugs 2018; 37:262-270. [PMID: 29998364 DOI: 10.1007/s10637-018-0635-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 07/03/2018] [Indexed: 12/31/2022]
Abstract
Pancreatic cancer, the fourth leading cause of cancer death in the United States, has a negative prognosis because metastasis occurs before symptoms manifest. Although combination therapies are showing improvements in treatment, the survival rate for pancreatic cancer five years post diagnosis is only 8%, stressing the need for new treatments. The receptor for advanced glycation end products (RAGE) has recently emerged as a chemotherapeutic target in KRAS driven pancreatic cancers both for treatment and in chemoprevention. RAGE appears to be an important regulator of inflammatory, stress and survival pathways that lead to carcinogenesis, resistance to chemotherapy, enhanced proliferation and the high metastatic potential of pancreatic cancer. RAGE expression has been demonstrated in pancreatic cancer tumors but not in adjacent epithelial tissues. Its presence is associated with increased proliferation and metastasis. In an effort to identify novel inhibitors of RAGE among our collection of marine-derived secondary metabolites, a cell-based screening assay utilizing flow cytometry was developed. This effort led to the identification of scalarin as the active compound in a marine sponge identified as Euryspongia cf. rosea. Scalarin is a sesterterpene natural product isolated previously from a different marine sponge. Scalarin reduces the levels of RAGE and inhibits autophagy in the PANC-1 and MIA PaCa-2 pancreatic cancer cell lines. Its IC50 for cytotoxicity ranges between 20 and 30 μM in the AsPC-1, PANC-1, MIA PaCa-2 and BxPC-3 pancreatic cancer cell lines. Inhibition of autophagy limits tumor growth and tumorigenesis in pancreatic cancer, making scalarin an interesting compound that may merit further study.
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23
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Abedini A, Derk J, Schmidt AM. The receptor for advanced glycation endproducts is a mediator of toxicity by IAPP and other proteotoxic aggregates: Establishing and exploiting common ground for novel amyloidosis therapies. Protein Sci 2018; 27:1166-1180. [PMID: 29664151 PMCID: PMC6032365 DOI: 10.1002/pro.3425] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 04/09/2018] [Accepted: 04/10/2018] [Indexed: 12/23/2022]
Abstract
Proteotoxicity plays a key role in many devastating human disorders, including Alzheimer's, Huntington's and Parkinson's diseases; type 2 diabetes; systemic amyloidosis; and cardiac dysfunction, to name a few. The cellular mechanisms of proteotoxicity in these disorders have been the focus of considerable research, but their role in prevalent and morbid disorders, such as diabetes, is less appreciated. There is a large body of literature on the impact of glucotoxicity and lipotoxicity on insulin-producing pancreatic β-cells, and there is increasing recognition that proteotoxicty plays a key role. Pancreatic islet amyloidosis by the hormone IAPP, the production of advanced glycation endproducts (AGE), and insulin misprocessing into cytotoxic aggregates are all sources of β-cell proteotoxicity in diabetes. AGE, produced by the reaction of reducing sugars with proteins and lipids are ligands for the receptor for AGE (RAGE), as are the toxic pre-fibrillar aggregates of IAPP produced during amyloid formation. The mechanisms of amyloid formation by IAPP in vivo or in vitro are not well understood, and the cellular mechanisms of IAPP-induced β-cell death are not fully defined. Here, we review recent findings that illuminate the factors and mechanisms involved in β-cell proteotoxicity in diabetes. Together, these new insights have far-reaching implications for the establishment of unifying mechanisms by which pathological amyloidoses imbue their injurious effects in vivo.
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Affiliation(s)
- Andisheh Abedini
- Diabetes Research Program, Division of Endocrinology, Department of MedicineNew York University Medical Center, 550 First Avenue, Smilow 906New YorkNew York10016
| | - Julia Derk
- Diabetes Research Program, Division of Endocrinology, Department of MedicineNew York University Medical Center, 550 First Avenue, Smilow 906New YorkNew York10016
| | - Ann Marie Schmidt
- Diabetes Research Program, Division of Endocrinology, Department of MedicineNew York University Medical Center, 550 First Avenue, Smilow 906New YorkNew York10016
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24
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Loftis JM, Valerio J, Taylor J, Huang E, Hudson R, Taylor-Young P, Chang M, Ho SB, Dieperink E, Miranda JL, Hauser P. S100B and Inflammatory Cytokine Levels in Blood as Potential Markers of Blood-Brain Barrier Damage and Psychiatric Impairment in Comorbid Hepatitis C Viral Infection and Alcohol Use Disorder. Alcohol Clin Exp Res 2018; 42:10.1111/acer.13796. [PMID: 29953169 PMCID: PMC6310679 DOI: 10.1111/acer.13796] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 05/15/2018] [Indexed: 12/24/2022]
Abstract
BACKGROUND Hepatitis C virus (HCV) infection and alcohol use disorder (AUD) both adversely affect the immune system resulting in alterations in immune cell signaling and inflammatory processes. The aim of this study was to investigate how comorbid AUD contributes to abnormalities in inflammatory mediators and psychiatric impairments in adults with HCV. METHODS Alcohol use, mood, and inflammatory factors were evaluated at 3 time points (baseline, week 4, and week 12) in Veterans with HCV, with (n = 42) and without (n = 13) comorbid AUD. Peripheral indices of immune activation, blood-brain barrier (BBB) damage (S100 calcium-binding protein B [S100B]), liver function, and viral load were measured using immunoassays and polymerase chain reaction assays. RESULTS Comorbid AUD was associated with increased symptoms of depression and anxiety, elevated levels of liver enzymes, and altered expression of inflammatory factors. Alcohol consumption was positively correlated with the severity of psychiatric symptoms. Univariate analysis identified significant group differences in interleukin (IL)-8 (p = 0.006), IL-10 (p = 0.03), and S100B (p = 0.048), with increased levels in participants with AUD, which persisted over time despite reductions in alcohol use and no significant change in HCV viral load. Statistically significant effects of study group or time were not found for the other immune factors assessed. Exploratory receiver operating characteristic curve analysis evaluated the ability of IL-8, IL-10, and S100B to differentiate between levels of alcohol consumption and generated biomarker cutoff values used to identify low risk and unhealthy alcohol use groups. CONCLUSIONS These results demonstrate that HCV and comorbid AUD are associated with greater psychiatric impairments, potentially resulting from increased inflammation, dysregulated cytokine expression, and compromised BBB function. Alcohol-induced BBB damage may increase the risk of neuropathological consequences within the context of chronic HCV infection.
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Affiliation(s)
- Jennifer M. Loftis
- Research & Development Service, VA Portland Health Care System, Portland, OR, USA
- Department of Psychiatry, Oregon Health & Science University, Portland, OR, USA
| | - Juno Valerio
- Research & Development Service, VA Portland Health Care System, Portland, OR, USA
| | - Jonathan Taylor
- Research & Development Service, VA Portland Health Care System, Portland, OR, USA
- Department of Psychiatry, Oregon Health & Science University, Portland, OR, USA
| | - Elaine Huang
- Research & Development Service, VA Portland Health Care System, Portland, OR, USA
- Department of Psychiatry, Oregon Health & Science University, Portland, OR, USA
| | - Rebekah Hudson
- Research & Development Service, VA Portland Health Care System, Portland, OR, USA
| | - Patricia Taylor-Young
- Nursing Research Department, VA Portland Health Care System, Portland, OR, USA
- School of Nursing, Oregon Health & Science University, Portland, OR, USA
| | - Michael Chang
- Gastroenterology, VA Portland Health Care System, Portland, OR, USA
- Internal Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Samuel B. Ho
- VA San Diego Healthcare System, San Diego, CA, USA
- Department of Medicine, University of California San Diego, San Diego, CA, USA
| | - Eric Dieperink
- Minneapolis VA Healthcare System, Minneapolis, MN, USA
- Department of Psychiatry, University of Minnesota School of Medicine, Minneapolis, MN, USA
| | - Juan Luis Miranda
- VA Long Beach Health Care System, 5901 E 7th St, Long Beach, CA, USA
| | - Peter Hauser
- VA Long Beach Health Care System, 5901 E 7th St, Long Beach, CA, USA
- Department of Psychiatry and Human Behavior, University of California-Irvine, Irvine, CA, USA
- Department of Psychiatry, University of California San Diego, San Diego, CA, USA
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25
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Skvarc DR, Berk M, Byrne LK, Dean OM, Dodd S, Lewis M, Marriott A, Moore EM, Morris G, Page RS, Gray L. Post-Operative Cognitive Dysfunction: An exploration of the inflammatory hypothesis and novel therapies. Neurosci Biobehav Rev 2017; 84:116-133. [PMID: 29180259 DOI: 10.1016/j.neubiorev.2017.11.011] [Citation(s) in RCA: 196] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 10/16/2017] [Accepted: 11/20/2017] [Indexed: 12/11/2022]
Abstract
Post-Operative Cognitive Dysfunction (POCD) is a highly prevalent condition with significant clinical, social and financial impacts for patients and their communities. The underlying pathophysiology is becoming increasingly understood, with the role of neuroinflammation and oxidative stress secondary to surgery and anaesthesia strongly implicated. This review aims to describe the putative mechanisms by which surgery-induced inflammation produces cognitive sequelae, with a focus on identifying potential novel therapies based upon their ability to modify these pathways.
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Affiliation(s)
- David R Skvarc
- School of Psychology, Deakin University, Melbourne, Australia; Deakin University, Innovations in Mental and Physical Health and Clinical Treatment (IMPACT) Strategic Research Centre, Barwon Health, Geelong, Australia.
| | - Michael Berk
- Deakin University, Innovations in Mental and Physical Health and Clinical Treatment (IMPACT) Strategic Research Centre, Barwon Health, Geelong, Australia; Deakin University, School of Medicine, Geelong, Australia; Orygen, The National Centre of Excellence in Youth Mental Health, The Department of Psychiatry and the Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Australia.
| | - Linda K Byrne
- School of Psychology, Deakin University, Melbourne, Australia.
| | - Olivia M Dean
- Deakin University, Innovations in Mental and Physical Health and Clinical Treatment (IMPACT) Strategic Research Centre, Barwon Health, Geelong, Australia; Deakin University, School of Medicine, Geelong, Australia; Orygen, The National Centre of Excellence in Youth Mental Health, The Department of Psychiatry and the Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Australia
| | - Seetal Dodd
- Deakin University, Innovations in Mental and Physical Health and Clinical Treatment (IMPACT) Strategic Research Centre, Barwon Health, Geelong, Australia; Deakin University, School of Medicine, Geelong, Australia
| | - Matthew Lewis
- School of Psychology, Deakin University, Melbourne, Australia; Aged Psychiatry Service, Caulfield Hospital, Alfred Health, Caulfield, Australia
| | - Andrew Marriott
- Department of Anaesthesia, Perioperative Medicine & Pain Management, Barwon Health, Geelong, Australia; Deakin University, Innovations in Mental and Physical Health and Clinical Treatment (IMPACT) Strategic Research Centre, Barwon Health, Geelong, Australia; Deakin University, School of Medicine, Geelong, Australia; Orygen, The National Centre of Excellence in Youth Mental Health, The Department of Psychiatry and the Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Australia
| | - Eileen M Moore
- Department of Anaesthesia, Perioperative Medicine & Pain Management, Barwon Health, Geelong, Australia; Deakin University, Innovations in Mental and Physical Health and Clinical Treatment (IMPACT) Strategic Research Centre, Barwon Health, Geelong, Australia
| | | | - Richard S Page
- Deakin University, School of Medicine, Geelong, Australia; Department of Orthopaedics, Barwon Health, Geelong, Australia
| | - Laura Gray
- Deakin University, School of Medicine, Geelong, Australia.
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26
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CRAMP deficiency leads to a pro-inflammatory phenotype and impaired phagocytosis after exposure to bacterial meningitis pathogens. Cell Commun Signal 2017; 15:32. [PMID: 28915816 PMCID: PMC5602852 DOI: 10.1186/s12964-017-0190-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 09/12/2017] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Antimicrobial peptides are important components of the host defence with a broad range of functions including direct antimicrobial activity and modulation of inflammation. Lack of cathelin-related antimicrobial peptide (CRAMP) was associated with higher mortality and bacterial burden and impaired neutrophil granulocyte infiltration in a model of pneumococcal meningitis. The present study was designed to characterize the effects of CRAMP deficiency on glial response and phagocytosis after exposure to bacterial stimuli. METHODS CRAMP-knock out and wildtype glial cells were exposed to bacterial supernatants from Streptococcus pneumoniae and Neisseria meningitides or the bacterial cell wall components lipopolysaccharide and peptidoglycan. Cell viability, expression of pro- and anti-inflammatory mediators and activation of signal transduction pathways, phagocytosis rate and glial cell phenotype were investigated by means of cell viability assays, immunohistochemistry, real-time RT-PCR and Western blot. RESULTS CRAMP-deficiency was associated with stronger expression of pro-inflammatory and weakened expression of anti-inflammatory cytokines indicating a higher degree of glial cell activation even under resting-state conditions. Furthermore, increased translocation of nuclear factor 'kappa-light-chain-enhancer' of activated B-cells was observed and phagocytosis of S. pneumoniae was reduced in CRAMP-deficient microglia indicating impaired antimicrobial activity. CONCLUSIONS In conclusion, the present study detected severe alterations of the glial immune response due to lack of CRAMP. The results indicate the importance of CRAMP to maintain and regulate the delicate balance between beneficial and harmful immune response in the brain.
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27
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Fibroblast growth factor 21 ameliorates high glucose-induced fibrogenesis in mesangial cells through inhibiting STAT5 signaling pathway. Biomed Pharmacother 2017; 93:695-704. [DOI: 10.1016/j.biopha.2017.06.100] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 06/12/2017] [Accepted: 06/29/2017] [Indexed: 12/30/2022] Open
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28
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Lawrimore CJ, Crews FT. Ethanol, TLR3, and TLR4 Agonists Have Unique Innate Immune Responses in Neuron-Like SH-SY5Y and Microglia-Like BV2. Alcohol Clin Exp Res 2017; 41:939-954. [PMID: 28273337 PMCID: PMC5407472 DOI: 10.1111/acer.13368] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 02/24/2017] [Indexed: 12/26/2022]
Abstract
BACKGROUND Ethanol (EtOH) consumption leads to an increase of proinflammatory signaling via activation of Toll-like receptors (TLRs) such as TLR3 and TLR4 that leads to kinase activation (ERK1/2, p38, TBK1), transcription factor activation (NFκB, IRF3), and increased transcription of proinflammatory cytokines such as TNF-α, IL-1β, and IL-6. This immune signaling cascade is thought to play a role in neurodegeneration and alcohol use disorders. While microglia are considered to be the primary macrophage in brain, it is unclear what if any role neurons play in EtOH-induced proinflammatory signaling. METHODS Microglia-like BV2 and retinoic acid-differentiated neuron-like SH-SY5Y were treated with TLR3 agonist Poly(I:C), TLR4 agonist lipopolysaccharide (LPS), or EtOH for 10 or 30 minutes to examine proinflammatory immune signaling kinase and transcription factor activation using Western blot, and for 24 hours to examine induction of proinflammatory gene mRNA using RT-PCR. RESULTS In BV2, both LPS and Poly(I:C) increased p-ERK1/2, p-p38, and p-NFκB by 30 minutes, whereas EtOH decreased p-ERK1/2 and increased p-IRF3. LPS, Poly(I:C), and EtOH all increased TNF-α and IL-1β mRNA, and EtOH further increased TLR2, 7, 8, and MD-2 mRNA in BV2. In SH-SY5Y, LPS had no effect on kinase or proinflammatory gene expression. However, Poly(I:C) increased p-p38 and p-IRF3, and increased expression of TNF-α, IL-1β, and IL-6, while EtOH increased p-p38, p-IRF3, p-TBK1, and p-NFκB while decreasing p-ERK1/2 and increasing expression of TLR3, 7, 8, and RAGE mRNA. HMGB1, a TLR agonist, was induced by LPS in BV2 and by EtOH in both cell types. EtOH was more potent at inducing proinflammatory gene mRNA in SH-SY5Y compared with BV2. CONCLUSIONS These results support a novel and unique mechanism of EtOH, TLR3, and TLR4 signaling in neuron-like SH-SY5Y and microglia-like BV2 that likely contributes to the complexity of brain neuroimmune signaling.
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Affiliation(s)
- Colleen J Lawrimore
- Bowles Center for Alcohol Studies , School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Curriculum in Neurobiology , University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Fulton T Crews
- Bowles Center for Alcohol Studies , School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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29
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Roeben B, Maetzler W, Vanmechelen E, Schulte C, Heinzel S, Stellos K, Godau J, Huber H, Brockmann K, Wurster I, Gaenslen A, Grüner E, Niebler R, Eschweiler GW, Berg D. Association of Plasma Aβ40 Peptides, But Not Aβ42, with Coronary Artery Disease and Diabetes Mellitus. J Alzheimers Dis 2017; 52:161-9. [PMID: 27003209 DOI: 10.3233/jad-150575] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND/OBJECTIVE Plasma levels of amyloid-beta (Aβ) 1-40 peptide have been proposed to be associated with cardiovascular mortality in patients with coronary artery disease (CAD). Therefore, we aimed to investigate the association of plasma Aβ levels with CAD, cardiovascular risk factors (CVRF), and APOE genotype in non-demented elderly individuals. METHODS Plasma Aβ1 - 40 and Aβ1 - 42 levels of 526 individuals (mean age of 63.0±7.3 years) were quantified with the INNO-BIA plasma Aβ forms assay based on multiplextrademark technique. APOE genotype was determined with an established protocol. Presence of CAD and CVRFs were ascertained using a questionnaire and/or medical records. RESULTS Plasma Aβ1 - 40 levels were significantly higher in individuals with CAD (p = 0.043) and, independently, in individuals with diabetes mellitus (DM) type 2 (p = 0.001) while accounting for age- and gender-effects. Plasma Aβ1 - 42 levels were higher in APOEɛ4 carriers (p = 0.004), but were neither relevantly associated with CAD nor with any CVRF. Plasma Aβ1 - 40 showed no association with APOE genotype. DISCUSSION Our findings argue for an association of circulating plasma Aβ1 - 40 peptides with incident CAD and DM. Further investigations are needed to entangle the role of Aβ1 - 40 role in the pathophysiology of cardiovascular disease independent of its known role in Alzheimer's disease.
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Affiliation(s)
- Benjamin Roeben
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Walter Maetzler
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany.,Geriatric Center, University of Tübingen, Tübingen, Germany
| | - Eugeen Vanmechelen
- Key4AD, Eke, Belgium.,Innogenetics N.V. (now Fujirebio Europe N.V.), Ghent, Belgium
| | - Claudia Schulte
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Sebastian Heinzel
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Konstantinos Stellos
- Institute of Cardiovascular Regeneration, Centre of Molecular Medicine, J.W. Goethe University Frankfurt, Frankfurt am Main, Germany.,Department of Cardiology, J.W. Goethe University Frankfurt, Frankfurt am Main, Germany.,German Center of Cardiovascular Research (DZHK), Frankfurt, Germany
| | - Jana Godau
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen, Tübingen, Germany
| | - Heiko Huber
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany.,Department of Psychiatry and Psychotherapy, University of Tübingen, Tübingen, Germany
| | - Kathrin Brockmann
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Isabel Wurster
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Alexandra Gaenslen
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Eva Grüner
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen, Tübingen, Germany
| | - Raphael Niebler
- Department of Psychiatry and Psychotherapy, University of Tübingen, Tübingen, Germany.,Geriatric Center, University of Tübingen, Tübingen, Germany
| | - Gerhard W Eschweiler
- Department of Psychiatry and Psychotherapy, University of Tübingen, Tübingen, Germany.,Geriatric Center, University of Tübingen, Tübingen, Germany
| | - Daniela Berg
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
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30
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Zhao J, Ma B, Nussinov R. Compilation and Analysis of Enzymes, Engineered Antibodies, and Nanoparticles Designed to Interfere with Amyloid-β Aggregation. Isr J Chem 2016. [DOI: 10.1002/ijch.201600093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jun Zhao
- Cancer and Inflammation Program; National Cancer Institute; Frederick Maryland 21702 USA
| | - Buyong Ma
- Basic Science Program; Leidos Biomedical Research, Inc.; Cancer and Inflammation Program; National Cancer Institute; Frederick Maryland 21702 USA
| | - Ruth Nussinov
- Basic Science Program; Leidos Biomedical Research, Inc.; Cancer and Inflammation Program; National Cancer Institute; Frederick Maryland 21702 USA
- Sackler Institute of Molecular Medicine; Department of Human Genetics and Molecular Medicine; Sackler School of Medicine; Tel Aviv University; Tel Aviv 69978 Israel
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31
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Nankali M, Karimi J, Goodarzi MT, Saidijam M, Khodadadi I, Razavi ANE, Rahimi F. Increased Expression of the Receptor for Advanced Glycation End-Products (RAGE) Is Associated with Advanced Breast Cancer Stage. Oncol Res Treat 2016; 39:622-628. [PMID: 27710974 DOI: 10.1159/000449326] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 08/17/2016] [Indexed: 11/19/2022]
Abstract
BACKGROUND The receptor for advanced glycation end-products (RAGE) is a multiligand transmembrane receptor that is overexpressed in various pathological conditions including cancers. However, the expression pattern of RAGE in breast cancer tumors is still not completely clear. METHODS In this study, we investigated the expression levels of RAGE in 25 fresh-frozen breast cancer samples and corresponding noncancerous tissue samples collected from breast cancer patients, by real-time polymerase chain reaction (PCR). Additionally, we performed immunohistochemistry on breast cancer specimens. RESULTS The results indicate a high expression of the RAGE-encoding gene in the cancerous tissues. RAGE expression at the mRNA and protein levels was statistically significantly up-regulated in advanced-stage and triple-negative breast tumors and node-positive tissues compared with other tissues (p < 0.001). A significant association between RAGE expression and tumor size was observed (p = 0.029). CONCLUSIONS Overexpression of RAGE in advanced-stage tumors may be a useful biomarker for diagnosis and the prediction of breast cancer progression.
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Affiliation(s)
- Maryam Nankali
- Department of Biochemistry, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
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32
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Berrocal-Almanza LC, Goyal S, Hussain A, Klassert TE, Driesch D, Grozdanovic Z, Sumanlatha G, Ahmed N, Valluri V, Conrad ML, Dittrich N, Schumann RR, Lala B, Slevogt H. S100A12 is up-regulated in pulmonary tuberculosis and predicts the extent of alveolar infiltration on chest radiography: an observational study. Sci Rep 2016; 6:31798. [PMID: 27539060 PMCID: PMC4990910 DOI: 10.1038/srep31798] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 07/26/2016] [Indexed: 12/30/2022] Open
Abstract
Pulmonary tuberculosis (PTB) results in lung functional impairment and there are no surrogate markers to monitor the extent of lung involvement. We investigated the clinical significance of S100A12 and soluble receptor for advanced glycation end-products (sRAGE) for predicting the extent of lung involvement. We performed an observational study in India with 119 newly diagnosed, treatment naïve, sputum smear positive, HIV-negative PTB patients and 163 healthy controls. All patients were followed-up for six months. Sociodemographic variables and the serum levels of S100A12, sRAGE, esRAGE, HMGB-1, TNF-α, IFN-γ and CRP were measured. Lung involvement in PTB patients was assessed by chest radiography. Compared with healthy controls, PTB patients had increased serum concentrations of S100A12 while sRAGE was decreased. S100A12 was an independent predictor of disease occurrence (OR 1.873, 95%CI 1.212-2.891, p = 0.004). Under DOTS therapy, S100A12 decreased significantly after 4 months whereas CRP significantly decreased after 2 months (p < 0.0001). Importantly, although CRP was also an independent predictor of disease occurrence, only S100A12 was a significant predictor of lung alveolar infiltration (OR 2.60, 95%CI 1.35-5.00, p = 0.004). These results suggest that S100A12 has the potential to assess the extent of alveolar infiltration in PTB.
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Affiliation(s)
- Luis C Berrocal-Almanza
- Institute for Microbiology and Hygiene, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Septomics Research Center, Jena University Hospital, Jena, Germany
| | - Surabhi Goyal
- Institute for Microbiology and Hygiene, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Abid Hussain
- Department of Immunology, Bhagwan Mahavir Medical Research Centre, Hyderabad, India
| | | | | | - Zarko Grozdanovic
- Department of Radiology, Campus Benjamin Franklin, Charité - Universitätsmedizin Berlin, Germany
| | - Gadamm Sumanlatha
- Department of Immunology, Bhagwan Mahavir Medical Research Centre, Hyderabad, India
| | - Niyaz Ahmed
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad, Hyderabad, India
| | - Vijayalakshmi Valluri
- Immunology and Molecular Biology, LEPRA Society- Blue Peter Research Centre, Hyderabad, India
| | - Melanie L Conrad
- Institute for Microbiology and Hygiene, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Nickel Dittrich
- Institute for Microbiology and Hygiene, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Ralf R Schumann
- Institute for Microbiology and Hygiene, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Birgit Lala
- Department of Paediatric Radiology, Campus Virchow-Klinikum, Charité - Universitätsmedizin Berlin, Germany
| | - Hortense Slevogt
- Septomics Research Center, Jena University Hospital, Jena, Germany
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Shao Y, Shao X, He J, Cai Y, Zhao J, Chen F, Tao H, Yin Z, Tan X, He Y, Lin Y, Li K, Cui L. The promoter polymorphisms of receptor for advanced glycation end products were associated with the susceptibility and progression of sepsis. Clin Genet 2016; 91:564-575. [PMID: 27172264 DOI: 10.1111/cge.12800] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 04/16/2016] [Accepted: 05/08/2016] [Indexed: 12/18/2022]
Abstract
Receptor for advanced glycation end products (RAGE) is considered a major pattern recognition receptor, which plays an important role in the development of sepsis. Increasing evidence showed an association between RAGE polymorphisms and the susceptibility to several inflammatory-related diseases. However, little is known about the clinical relationship between RAGE polymorphisms and sepsis. In this study, we analyzed the association of sepsis with three functional RAGE gene polymorphisms (rs1800624, rs1800625 and rs2070600) in a Chinese Han population (372 sepsis cases and 400 healthy controls). Significant differences were observed in the rs1800624 and rs1800625 genotype/allele distributions between the sepsis and controls, but no significant difference was observed in the rs2070600 genotype/allele. Moreover, our results also revealed a significant difference in the genotype/allele frequencies of the rs1800624 and rs1800625 polymorphisms between the sepsis and severe sepsis subtypes, the rs1800624 TT or rs1800625 TT genotype carriers exhibited a significant increase in RAGE mRNA, sRAGE, TNF-α and IL-6 expression compared with the rs1800624 AT/AA or rs1800625 CT/CC carriers in sepsis patients. Overall, this study might provide valuable clinical evidence between the RAGE gene polymorphisms and the risk or the development of sepsis.
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Affiliation(s)
- Y Shao
- The Intensive Care Unit, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
| | - X Shao
- The Intensive Care Unit, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
| | - J He
- The Intensive Care Unit, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
| | - Y Cai
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
| | - J Zhao
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
| | - F Chen
- The Intensive Care Unit, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
| | - H Tao
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
| | - Z Yin
- The Intensive Care Unit, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
| | - X Tan
- The Intensive Care Unit, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
| | - Y He
- The Department of Clinical Laboratory, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
| | - Y Lin
- The Department of Stomatology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
| | - K Li
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China.,Institute of Clinical Medicine, Jinan University, Guangzhou, PR China
| | - L Cui
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, PR China
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Traoré K, Arama C, Médebielle M, Doumbo O, Picot S. Do advanced glycation end-products play a role in malaria susceptibility? ACTA ACUST UNITED AC 2016; 23:15. [PMID: 27012162 PMCID: PMC4807375 DOI: 10.1051/parasite/2016015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 03/10/2016] [Indexed: 12/30/2022]
Abstract
There are growing data supporting the differences in susceptibility to malaria described between sympatric populations with different lifestyles. Evidence has also been growing for some time that nutritional status and the host's metabolism are part of the complex mechanisms underlying these differences. The role of dietary advanced glycation end-products (AGEs) in the modulation of immune responses (innate and adaptive responses) and chronic oxidative stress has been established. But less is known about AGE implication in naturally acquired immunity and susceptibility to malaria. Since inflammatory immune responses and oxidative events have been demonstrated as the hallmark of malaria infection, it seems crucial to investigate the role of AGE in susceptibility or resistance to malaria. This review provides new insight into the relationship between nutrition, metabolic disorders, and infections, and how this may influence the mechanisms of susceptibility or resistance to malaria in endemic areas.
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Affiliation(s)
- Karim Traoré
- Malaria Research and Training Center MRTC-DEAP-FMPOS-UMI 3189, Université des Sciences, des Techniques et des Technologies de Bamako, BP 1805, Bamako, Mali - Univ Lyon, Université Claude Bernard Lyon 1, Institut de Chimie, de Biologie Moléculaire et Supramoléculaire ICBMS-UMR5246, CNRS-INSA-CPE, Malaria Research Unit, - 43 boulevard du 11 novembre 1918, 69622 Lyon, France
| | - Charles Arama
- Malaria Research and Training Center MRTC-DEAP-FMPOS-UMI 3189, Université des Sciences, des Techniques et des Technologies de Bamako, BP 1805, Bamako, Mali
| | - Maurice Médebielle
- Univ Lyon, Université Claude Bernard Lyon 1, Institut de Chimie, de Biologie Moléculaire et Supramoléculaire ICBMS-UMR5246, CNRS-INSA-CPE, - 43 boulevard du 11 novembre 1918, 69622 Lyon, France
| | - Ogobara Doumbo
- Malaria Research and Training Center MRTC-DEAP-FMPOS-UMI 3189, Université des Sciences, des Techniques et des Technologies de Bamako, BP 1805, Bamako, Mali
| | - Stéphane Picot
- Univ Lyon, Université Claude Bernard Lyon 1, Institut de Chimie, de Biologie Moléculaire et Supramoléculaire ICBMS-UMR5246, CNRS-INSA-CPE, Malaria Research Unit, - 43 boulevard du 11 novembre 1918, 69622 Lyon, France
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35
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Han SH, Park JC, Mook-Jung I. Amyloid β-interacting partners in Alzheimer's disease: From accomplices to possible therapeutic targets. Prog Neurobiol 2016; 137:17-38. [DOI: 10.1016/j.pneurobio.2015.12.004] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 12/02/2015] [Accepted: 12/09/2015] [Indexed: 12/20/2022]
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36
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Chung J, An SH, Kang SW, Kwon K. Ursodeoxycholic Acid (UDCA) Exerts Anti-Atherogenic Effects by Inhibiting RAGE Signaling in Diabetic Atherosclerosis. PLoS One 2016; 11:e0147839. [PMID: 26807573 PMCID: PMC4726772 DOI: 10.1371/journal.pone.0147839] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 01/08/2016] [Indexed: 11/30/2022] Open
Abstract
A naturally occurring bile acid, ursodeoxycholic acid (UDCA), is known to alleviate endoplasmic reticulum (ER) stress at the cellular level. However, the detailed action mechanisms of UDCA in atherosclerosis are not fully understood. In this study, we demonstrated whether UDCA exerts anti-atherogenic activity in diabetic atherosclerosis by targeting ER stress and “receptor for advanced glycation endproduct” (RAGE) signaling. UDCA markedly reduced ER stress, RAGE expression, and pro-inflammatory responses [including NF-κB activation and reactive oxygen species (ROS) production] induced in endothelial cells (ECs) by high glucose (HG). In particular, UDCA inhibited HG-induced ROS production by increasing the Nrf2 level. In macrophages, UDCA also blocked HG-induced RAGE and pro-inflammatory cytokine expression and inhibited foam cell formation via upregulation of the ATP-binding cassette (ABC) transporters, ABCA1 and ABCG1. In the diabetic mouse model, UDCA inhibited atheromatous plaque formation by decreasing ER stress, and the levels of RAGE and adhesion molecules. In conclusion, UDCA exerts an anti-atherogenic activity in diabetic atherosclerosis by targeting both ER stress and RAGE signaling. Our work implicates UDCA as a potential therapeutic agent for prevention or treatment of diabetic atherosclerosis.
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Affiliation(s)
- Jihwa Chung
- Medical Research Institute, School of Medicine, Ewha Womans University, Seoul, Korea
| | - Shung Hyun An
- Medical Research Institute, School of Medicine, Ewha Womans University, Seoul, Korea
| | - Sang Won Kang
- Center for Cell Signaling Research and Division of Molecular Life Sciences, Ewha Womans University, Seoul, Korea
| | - Kihwan Kwon
- Medical Research Institute, School of Medicine, Ewha Womans University, Seoul, Korea
- Department of Internal Medicine, Cardiology Division and GT5 Program of Ewha Womans University School of Medicine, Seoul, Korea
- * E-mail:
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Kim Y, Kim C, Son SM, Song H, Hong HS, Han SH, Mook-Jung I. The novel RAGE interactor PRAK is associated with autophagy signaling in Alzheimer's disease pathogenesis. Mol Neurodegener 2016; 11:4. [PMID: 26758977 PMCID: PMC4709948 DOI: 10.1186/s13024-016-0068-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 01/04/2016] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND The receptor for advanced glycation end products (RAGE) has been found to interact with amyloid β (Aβ). Although RAGE does not have any kinase motifs in its cytosolic domain, the interaction between RAGE and Aβ triggers multiple cellular signaling involved in Alzheimer's disease (AD). However, the mechanism of signal transduction by RAGE remains still unknown. Therefore, identifying binding proteins of RAGE may provide novel therapeutic targets for AD. RESULTS In this study, we identified p38-regulated/activated protein kinase (PRAK) as a novel RAGE interacting molecule. To investigate the effect of Aβ on PRAK mediated RAGE signaling pathway, we treated SH-SY5Y cells with monomeric form of Aβ. We demonstrated that Aβ significantly increased the phosphorylation of PRAK as well as the interaction between PRAK and RAGE. We showed that knockdown of PRAK rescued mTORC1 inactivation induced by Aβ treatment and decreased the formation of Aβ-induced autophagosome. CONCLUSIONS We provide evidence that PRAK plays a critical role in AD pathology as a key interactor of RAGE. Thus, our data suggest that PRAK might be a potential therapeutic target of AD involved in RAGE-mediated cell signaling induced by Aβ.
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Affiliation(s)
- Yoonhee Kim
- Department of Biochemistry and Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongro-gu, Seoul, 110-799, Korea.
| | - Chaeyoung Kim
- Department of Biochemistry and Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongro-gu, Seoul, 110-799, Korea.
| | - Sung Min Son
- Department of Biochemistry and Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongro-gu, Seoul, 110-799, Korea.
| | - Hyundong Song
- Department of Biochemistry and Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongro-gu, Seoul, 110-799, Korea.
| | - Hyun Seok Hong
- Department of Biochemistry and Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongro-gu, Seoul, 110-799, Korea.
| | - Sun-ho Han
- Department of Biochemistry and Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongro-gu, Seoul, 110-799, Korea.
| | - Inhee Mook-Jung
- Department of Biochemistry and Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongro-gu, Seoul, 110-799, Korea.
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Zhao H, Li N, Wang Q, Cheng X, Li X, Liu T. Resveratrol decreases the insoluble Aβ1–42 level in hippocampus and protects the integrity of the blood–brain barrier in AD rats. Neuroscience 2015; 310:641-9. [DOI: 10.1016/j.neuroscience.2015.10.006] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 09/08/2015] [Accepted: 10/03/2015] [Indexed: 10/22/2022]
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Wang J, Wang H, Shi J, Ding Y. Effects of bone marrow MSCs transfected with sRAGE on the intervention of HMGB1 induced immuno-inflammatory reaction. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2015; 8:12028-12040. [PMID: 26722388 PMCID: PMC4680333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 09/24/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND High mobility group box chromosomal protein 1 (HMGB1) is an important proinflammatory molecule in many inflammatory disorders, but little is known about its role in acute liver failure (ALF). In this study, we determined the plasma and hepatic tissue levels of HMGB1 in a d-galactosamine-induced rat ALF model and investigated the effect of soluble receptor for advanced glycation end products (sRAGE) on ALF successfully. METHODS Male Sprague-Dawley rats were divided into five groups randomly. Group A (Control group, n=20) received administrated saline via peritoneal cavity. Group B (ALF group, n=20) induced by d-galactosamine (0.6 g/kg) via peritoneal cavity. Group C (HMGB1 group, n=20) were treated with HMGB1 recombination protein (200 μg/kg) via penile vein after ALF model induced. Group D (sRAGE group, n=20) received administrated sRAGE recombination protein (400 μg/kg) via penile vein after ALF model induced. Group E (sRAGE-MSC group, n=20) received 3 × 10(6) MSC transplantation which could maintain a stable expression of sRAGE via penile vein after ALF model induced. Liver function, level of cytokines and liver pathological changes were measured. RESULTS We determined that the plasma levels and hepatic tissue levels of HMGB1 were significant increased in ALF model (P<0.05). SRAGE group and sRAGE-MSC group could significantly prolong ALF rat survival time, as well as improve its liver functions, inflammatory cytokines level and hepatocytes necrosis. CONCLUSION SRAGE as a ligand decoy has illustrated largely beneficial effects on reducing immuno-inflammatory response, which holds promise for the identification of potential therapeutic targets and/or biomarkers of RAGE activity in ALF.
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Affiliation(s)
- Jun Wang
- Department of Hepatobiliary Surgery, Drum Tower Clinical Medical College of Nanjing Medical UniversityNanjing, China
| | - Hao Wang
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing, China
- Jiangsu Province’s Key Medical Center for Digestive DiseaseNanjing, China
- Institute of Hepatobiliary Surgery, Nanjing UniversityNanjing, China
| | - Jiong Shi
- Department of Pathology, Drum Tower Clinical Medical College of Nanjing Medical UniversityNanjing, China
| | - Yitao Ding
- Department of Hepatobiliary Surgery, Drum Tower Clinical Medical College of Nanjing Medical UniversityNanjing, China
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing, China
- Jiangsu Province’s Key Medical Center for Digestive DiseaseNanjing, China
- Institute of Hepatobiliary Surgery, Nanjing UniversityNanjing, China
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Sharma C, Kaur A, Thind SS, Singh B, Raina S. Advanced glycation End-products (AGEs): an emerging concern for processed food industries. Journal of Food Science and Technology 2015; 52:7561-76. [PMID: 26604334 DOI: 10.1007/s13197-015-1851-y] [Citation(s) in RCA: 141] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 04/12/2015] [Accepted: 04/22/2015] [Indexed: 01/02/2023]
Abstract
The global food industry is expected to increase more than US $ 7 trillion by 2014. This rise in processed food sector shows that more and more people are diverging towards modern processed foods. As modern diets are largely heat processed, they are more prone to contain high levels of advanced glycation end products (AGEs). AGEs are a group of complex and heterogeneous compounds which are known as brown and fluorescent cross-linking substances such as pentosidine, non-fluorescent cross-linking products such as methylglyoxal-lysine dimers (MOLD), or non-fluorescent, non-cross linking adducts such as carboxymethyllysine (CML) and pyrraline (a pyrrole aldehyde). The chemistry of the AGEs formation, absorption and bioavailability and their patho-biochemistry particularly in relation to different complications like diabetes and ageing discussed. The concept of AGEs receptor - RAGE is mentioned. AGEs contribute to a variety of microvascular and macrovascular complications through the formation of cross-links between molecules in the basement membrane of the extracellular matrix and by engaging the receptor for advanced glycation end products (RAGE). Different methods of detection and quantification along with types of agents used for the treatment of AGEs are reviewed. Generally, ELISA or LC-MS methods are used for analysis of foods and body fluids, however lack of universally established method highlighted. The inhibitory effect of bioactive components on AGEs by trapping variety of chemical moieties discussed. The emerging evidence about the adverse effects of AGEs makes it necessary to investigate the different therapies to inhibit AGEs.
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Affiliation(s)
- Chetan Sharma
- Department of Food Science and Technology, Punjab Agricultural University, Ludhiana, India
| | - Amarjeet Kaur
- Department of Food Science and Technology, Punjab Agricultural University, Ludhiana, India
| | - S S Thind
- Department of Food Science and Technology, Punjab Agricultural University, Ludhiana, India
| | - Baljit Singh
- Department of Food Science and Technology, Punjab Agricultural University, Ludhiana, India
| | - Shiveta Raina
- Department of Microbiology, Punjab Agricultural University, Ludhiana, India
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Vila-Real H, Coelho H, Rocha J, Fernandes A, Ventura MR, Maycock CD, Iranzo O, Simplício AL. Peptidomimetic β-Secretase Inhibitors Comprising a Sequence of Amyloid-β Peptide for Alzheimer’s Disease. J Med Chem 2015; 58:5408-18. [DOI: 10.1021/acs.jmedchem.5b00658] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Helder Vila-Real
- Instituto de Biologia Experimental e Tecnológica, Av. da República, Quinta do Marquês, 2780-157 Oeiras, Portugal
- Instituto de Tecnologia Química e Biológica, Av. da República, Quinta do Marquês, 2780-157 Oeiras, Portugal
| | - Helena Coelho
- Instituto de Biologia Experimental e Tecnológica, Av. da República, Quinta do Marquês, 2780-157 Oeiras, Portugal
- Instituto de Tecnologia Química e Biológica, Av. da República, Quinta do Marquês, 2780-157 Oeiras, Portugal
| | - João Rocha
- Faculdade
de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Adelaide Fernandes
- Faculdade
de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - M. Rita Ventura
- Instituto de Tecnologia Química e Biológica, Av. da República, Quinta do Marquês, 2780-157 Oeiras, Portugal
| | - Christopher D. Maycock
- Instituto de Tecnologia Química e Biológica, Av. da República, Quinta do Marquês, 2780-157 Oeiras, Portugal
- Faculdade
de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Olga Iranzo
- Instituto de Tecnologia Química e Biológica, Av. da República, Quinta do Marquês, 2780-157 Oeiras, Portugal
| | - Ana L. Simplício
- Instituto de Biologia Experimental e Tecnológica, Av. da República, Quinta do Marquês, 2780-157 Oeiras, Portugal
- Instituto de Tecnologia Química e Biológica, Av. da República, Quinta do Marquês, 2780-157 Oeiras, Portugal
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Nedić O, Rogowska-Wrzesinska A, Rattan SIS. Standardization and quality control in quantifying non-enzymatic oxidative protein modifications in relation to ageing and disease: Why is it important and why is it hard? Redox Biol 2015; 5:91-100. [PMID: 25909343 PMCID: PMC4412909 DOI: 10.1016/j.redox.2015.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 04/03/2015] [Accepted: 04/07/2015] [Indexed: 11/03/2022] Open
Abstract
Post-translational modifications (PTM) of proteins determine the activity, stability, specificity, transportability and lifespan of a protein. Some PTM are highly specific and regulated involving various enzymatic pathways, but there are other non-enzymatic PTM (nePTM), which occur stochastically, depend on the ternary structure of proteins and can be damaging. It is often observed that inactive and abnormal proteins accumulate in old cells and tissues. The nature, site and extent of nePTM give rise to a population of that specific protein with alterations in structure and function ranging from being fully active to totally inactive molecules. Determination of the type and the amount (abundance) of nePTM is essential for establishing connection between specific protein structure and specific biological role. This article summarizes analytical demands for reliable quantification of nePTM, including requirements for the assay performance, standardization and quality control, and points to the difficulties, uncertainties and un-resolved issues.
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Affiliation(s)
- Olgica Nedić
- Institute for the Application of Nuclear Energy, University of Belgrade, Belgrade, Serbia.
| | | | - Suresh I S Rattan
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark.
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Huang CL, Hsiao IL, Lin HC, Wang CF, Huang YJ, Chuang CY. Silver nanoparticles affect on gene expression of inflammatory and neurodegenerative responses in mouse brain neural cells. ENVIRONMENTAL RESEARCH 2015; 136:253-263. [PMID: 25460644 DOI: 10.1016/j.envres.2014.11.006] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 11/03/2014] [Accepted: 11/05/2014] [Indexed: 06/04/2023]
Abstract
Silver nanoparticles (AgNPs) have antibacterial characteristics, and currently are applied in Ag-containing products. This study found neural cells can uptake 3-5 nm AgNPs, and investigated the potential effects of AgNPs on gene expression of inflammation and neurodegenerative disorder in murine brain ALT astrocytes, microglial BV-2 cells and neuron N2a cells. After AgNPs (5, 10, 12.5 μg/ml) exposure, these neural cells had obviously increased IL-1β secretion, and induced gene expression of C-X-C motif chemokine 13 (CXCL13), macrophage receptor with collagenous structure (MARCO) and glutathione synthetase (GSS) for inflammatory response and oxidative stress neutralization. Additionally, this study found amyloid-β (Aβ) plaques for pathological feature of Alzheimer's disease (AD) deposited in neural cells after AgNPs treatment. After AgNPs exposure, the gene expression of amyloid precursor protein (APP) was induced, and otherwise, neprilysin (NEP) and low-density lipoprotein receptor (LDLR) were reduced in neural cells as well as protein level. These results suggested AgNPs could alter gene and protein expressions of Aβ deposition potentially to induce AD progress in neural cells. It's necessary to take notice of AgNPs distribution in the environment.
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Affiliation(s)
- Chin-Lin Huang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - I-Lun Hsiao
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Ho-Chen Lin
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Chu-Fang Wang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Yuh-Jeen Huang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan.
| | - Chun-Yu Chuang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan.
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Wan WB, Cao L, Liu LM, Kalionis B, Chen C, Tai XT, Li YM, Xia SJ. EGb761 provides a protective effect against Aβ1-42 oligomer-induced cell damage and blood-brain barrier disruption in an in vitro bEnd.3 endothelial model. PLoS One 2014; 9:e113126. [PMID: 25426944 PMCID: PMC4245095 DOI: 10.1371/journal.pone.0113126] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Accepted: 10/20/2014] [Indexed: 01/16/2023] Open
Abstract
Alzheimer’s disease (AD) is the most common form of senile dementia which is characterized by abnormal amyloid beta (Aβ) accumulation and deposition in brain parenchyma and cerebral capillaries, and leads to blood-brain barrier (BBB) disruption. Despite great progress in understanding the etiology of AD, the underlying pathogenic mechanism of BBB damage is still unclear, and no effective treatment has been devised. The standard Ginkgo biloba extract EGb761 has been widely used as a potential cognitive enhancer for the treatment of AD. However, the cellular mechanism underlying the effect remain to be clarified. In this study, we employed an immortalized endothelial cell line (bEnd.3) and incubation of Aβ1–42 oligomer, to mimic a monolayer BBB model under conditions found in the AD brain. We investigated the effect of EGb761 on BBB and found that Aβ1–42 oligomer-induced cell injury, apoptosis, and generation of intracellular reactive oxygen species (ROS), were attenuated by treatment with EGb761. Moreover, treatment of the cells with EGb761 decreased BBB permeability and increased tight junction scaffold protein levels including ZO-1, Claudin-5 and Occludin. We also found that the Aβ1–42 oligomer-induced upregulation of the receptor for advanced glycation end-products (RAGE), which mediates Aβ cytotoxicity and plays an essential role in AD progression, was significantly decreased by treatment with EGb761. To our knowledge, we provide the first direct in vitro evidence of an effect of EGb761 on the brain endothelium exposed to Aβ1–42 oligomer, and on the expression of tight junction (TJ) scaffold proteins and RAGE. Our results provide a new insight into a possible mechanism of action of EGb761. This study provides a rational basis for the therapeutic application of EGb761 in the treatment of AD.
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Affiliation(s)
- Wen-bin Wan
- Department of Neurology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lan Cao
- State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Lu-mei Liu
- Geriatrics Department of Traditional Chinese Medicine, Huadong Hospital, Fudan University, Shanghai, China
| | - Bill Kalionis
- Department of Perinatal Medicine Pregnancy Research Centre and University of Melbourne Department of Obstetrics and Gynaecology, Royal Women’s Hospital, Parkville, VIC, Australia
| | - Chuan Chen
- Shanghai Geriatric Institute of Chinese Medicine, Shanghai, China
| | - Xian-tao Tai
- School of Acupuncture, Massage and Rehabilitation, Yunnan University of Traditional Chinese Medicine, Kunming, China
| | - Ya-ming Li
- Geriatrics Department of Traditional Chinese Medicine, Huadong Hospital, Fudan University, Shanghai, China
- * E-mail: (YML); (SJX)
| | - Shi-jin Xia
- Shanghai Institute of Geriatrics, Huadong Hospital, Fudan University, Shanghai, China
- * E-mail: (YML); (SJX)
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Greco R, Tassorelli C, Mangione AS, Levandis G, Certo M, Nappi G, Bagetta G, Blandini F, Amantea D. Neuroprotection by the PARP inhibitor PJ34 modulates cerebral and circulating RAGE levels in rats exposed to focal brain ischemia. Eur J Pharmacol 2014; 744:91-7. [PMID: 25446913 DOI: 10.1016/j.ejphar.2014.10.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 10/03/2014] [Accepted: 10/06/2014] [Indexed: 12/30/2022]
Abstract
The receptor for advanced glycation end products (RAGE) has a potential role as a damage-sensing molecule; however, to date, its involvement in the pathophysiology of stroke and its modulation following neuroprotective treatment are not completely understood. We have previously demonstrated that expression of distinct RAGE isoforms, recognized by different antibodies, is differentially modulated in the brain of rats subjected to focal cerebral ischemia. Here, we focus on the full-length membrane-bound RAGE isoform, showing that its expression is significantly elevated in the striatum, whereas it is reduced in the cortex of rats subjected to transient middle cerebral artery occlusion (MCAo). Notably, the reduction of cortical levels of full-length RAGE detected 24 h after reperfusion is abolished by systemic administration of a neuroprotective dose of the poly(ADP-ribose) polymerase (PARP) inhibitor, N-(6-oxo-5,6-dihydrophenanthridin-2-yl)-N,N-dimethylacetamide (PJ34). More interestingly, a significant reduction of plasma soluble RAGE (sRAGE) occurs 24 h after reperfusion and this effect is reverted by a neuroprotective dose of PJ34. Soluble forms of RAGE, generated either by alternative splicing or by proteolysis of the full-length form, effectively bind advanced glycation end products, thereby competing with the cell surface full-length RAGE, thus providing a 'decoy' function that may counteract the adverse effects of receptor signaling in neurons and may possibly exert cytoprotective effects. Thus, our data confirm the important role of RAGE in ischemic cerebral damage and, more interestingly, suggest the potential use of sRAGE as a blood biomarker of stroke severity and of neuroprotective treatment efficacy.
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Affiliation(s)
- Rosaria Greco
- Laboratory of Neurophysiology of Integrative Autonomic Systems, Headache Science Centre, "C. Mondino" National Neurological Institute, Pavia, Italy.
| | - Cristina Tassorelli
- Laboratory of Neurophysiology of Integrative Autonomic Systems, Headache Science Centre, "C. Mondino" National Neurological Institute, Pavia, Italy; Department of Brain and Behavior, University of Pavia, Italy
| | - Antonina Stefania Mangione
- Laboratory of Neurophysiology of Integrative Autonomic Systems, Headache Science Centre, "C. Mondino" National Neurological Institute, Pavia, Italy
| | - Giovanna Levandis
- Laboratory of Functional Neurochemistry, Center for Research in Neurodegenerative Diseases, "C. Mondino" National Neurological Institute, Pavia, Italy
| | - Michelangelo Certo
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende (CS), Italy
| | - Giuseppe Nappi
- Laboratory of Neurophysiology of Integrative Autonomic Systems, Headache Science Centre, "C. Mondino" National Neurological Institute, Pavia, Italy
| | - Giacinto Bagetta
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende (CS), Italy
| | - Fabio Blandini
- Laboratory of Functional Neurochemistry, Center for Research in Neurodegenerative Diseases, "C. Mondino" National Neurological Institute, Pavia, Italy
| | - Diana Amantea
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende (CS), Italy
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Rebholz CM, Astor BC, Grams ME, Halushka MK, Lazo M, Hoogeveen RC, Ballantyne CM, Coresh J, Selvin E. Association of plasma levels of soluble receptor for advanced glycation end products and risk of kidney disease: the Atherosclerosis Risk in Communities study. Nephrol Dial Transplant 2014; 30:77-83. [PMID: 25147225 DOI: 10.1093/ndt/gfu282] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Advanced glycation end products and their cell-bound receptors are thought to mediate the adverse effects of vascular disease through oxidative stress, inflammation and endothelial dysfunction. We examined the association between the soluble form of receptor for advanced glycation end products (sRAGE) and kidney disease. METHODS In this case-cohort study nested within the Atherosclerosis Risk in Communities (ARIC) study, baseline sRAGE levels were measured in a cohort random sample of participants without kidney disease (n= 1218), and among participants who developed incident chronic kidney disease (CKD) [estimated glomerular filtration rate (eGFR) <60 mL/min/1.73 m(2) and ≥25% eGFR decline, n = 151] and end-stage renal disease (ESRD) [entry in the US Renal Data System (USRDS) registry, n = 152]. RESULTS Baseline sRAGE levels were inversely related to baseline eGFR (r = -0.13). After adjusting for age, sex and race, one interquartile range higher log10-transformed sRAGE was associated with development of CKD [odds ratio: 1.39; 95% confidence interval (95% CI) 1.06-1.83; P = 0.02] and ESRD (hazard ratio: 1.97; 95% CI 1.47-2.64; P < 0.001). These associations were not significant after eGFR adjustment. CONCLUSIONS High sRAGE levels are associated with incident CKD and ESRD risk, but not after adjustment for kidney function at baseline. Future studies are needed to investigate specific mechanisms underlying the association of sRAGE with kidney disease risk.
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Affiliation(s)
- Casey M Rebholz
- Department of Epidemiology and Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Brad C Astor
- Departments of Medicine and Population Health Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Morgan E Grams
- Department of Epidemiology and Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA Division of Nephrology, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Marc K Halushka
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Mariana Lazo
- Department of Epidemiology and Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA Division of General Internal Medicine, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Ron C Hoogeveen
- Department of Medicine, Baylor College of Medicine and Methodist DeBakey Heart and Vascular Center, Houston, TX, USA
| | - Christie M Ballantyne
- Department of Medicine, Baylor College of Medicine and Methodist DeBakey Heart and Vascular Center, Houston, TX, USA
| | - Josef Coresh
- Department of Epidemiology and Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA Division of General Internal Medicine, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Elizabeth Selvin
- Department of Epidemiology and Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA Division of General Internal Medicine, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
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Sang HQ, Gu JF, Yuan JR, Zhang MH, Jia XB, Feng L. The protective effect of Smilax glabra extract on advanced glycation end products-induced endothelial dysfunction in HUVECs via RAGE-ERK1/2-NF-κB pathway. JOURNAL OF ETHNOPHARMACOLOGY 2014; 155:785-795. [PMID: 24953033 DOI: 10.1016/j.jep.2014.06.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 06/07/2014] [Accepted: 06/10/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Smilax glabra Roxb. (SGR) is a traditional Chinese herb that has been used in folk for the treatment of diabetic vascular complications. Advanced glycation end products (AGEs)-induced endothelial dysfunction has been thought to be a major cause of diabetic vascular complications. The present study was conducted to investigate the protective effect of SGR extract on AGEs-induced endothelial dysfunction and its underlying mechanisms. MATERIALS AND METHODS Human umbilical vein endothelial cells (HUVECs) were exposed to 200 μg/ml AGEs to induce endothelial dysfunction. Acridine orange/ethidium bromide (AO/EB) fluorescence assay and Annexin-V/PI double-staining were performed to determine endothelium apoptosis. Dihydroethidium (DHE) fluorescence probe, SOD and MDA kits were used to evaluate oxidative stress. The effect of SGR extract on AGEs-induced TGF-beta1 expression was determined by immunocytochemistry and western blotting. Attenuations of SGR extract on receptor for AGEs (RAGE) expression, extracellular regulated protein kinases (ERK1/2) activation and NF-κB phosphorylation were determined by immunofluorescence assay and western blotting. The blockade assays for RAGE and ERK1/2 were carried out using a specific RAGE-antibody (RAGE-Ab) or a selective ERK1/2 inhibitor PD98059 in immunofluorescence assay. RESULTS The pretreatment of SGR extract (0.125, 0.25 and 0.5 mg crude drug/ml) significantly attenuated AGEs-induced endothelium apoptosis, and down-regulated TGF-beta1 protein expression in HUVECs. It was also well shown that SGR extract could down-regulate dose-dependently ROS over-generation, MDA content, TGF-beta1 expression, ERK1/2 and NF-κB activation whereas increase significantly SOD activity. Furthermore, the AGEs-induced ERK1/2 activation could be attenuated by the blockade of RAGE-Ab (5 μg/ml) while the NF-κB activation was ameliorated by ERK1/2 inhibitor PD98059 (10 μM). CONCLUSION These results indicated that SGR extract could attenuate AGEs-induced endothelial dysfunction via RAGE-ERK1/2-NF-κB pathways. Our findings suggest that SGR extract may be beneficial for attenuating endothelial dysfunction in diabetic vascular complications.
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Affiliation(s)
- Hai-qiang Sang
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Henan, Zhengzhou 450052, PR China.
| | - Jun-fei Gu
- Key Laboratory of Delivery Systems of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing 210028, PR China; College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Jia-rui Yuan
- Key Laboratory of Delivery Systems of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing 210028, PR China; College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Ming-hua Zhang
- Key Laboratory of Delivery Systems of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing 210028, PR China
| | - Xiao-bin Jia
- Key Laboratory of Delivery Systems of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing 210028, PR China
| | - Liang Feng
- Key Laboratory of Delivery Systems of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing 210028, PR China.
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Receptor for advanced glycation end products (RAGE) and its ligands: focus on spinal cord injury. Int J Mol Sci 2014; 15:13172-91. [PMID: 25068700 PMCID: PMC4159787 DOI: 10.3390/ijms150813172] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 07/07/2014] [Accepted: 07/21/2014] [Indexed: 12/11/2022] Open
Abstract
Spinal cord injury (SCI) results in neuronal and glial death and the loss of axons at the injury site. Inflammation after SCI leads to the inhibition of tissue regeneration and reduced neuronal survival. In addition, the loss of axons after SCI results in functional loss below the site of injury accompanied by neuronal cell body’s damage. Consequently, reducing inflammation and promoting axonal regeneration after SCI is a worthy therapeutic goal. The receptor for advanced glycation end products (RAGE) is a transmembrane protein and receptor of the immunoglobulin superfamily. RAGE is implicated in inflammation and neurodegeneration. Several recent studies demonstrated an association between RAGE and central nervous system disorders through various mechanisms. However, the relationship between RAGE and SCI has not been shown. It is imperative to elucidate the association between RAGE and SCI, considering that RAGE relates to inflammation and axonal degeneration following SCI. Hence, the present review highlights recent research regarding RAGE as a compelling target for the treatment of SCI.
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Cell death-associated molecular-pattern molecules: inflammatory signaling and control. Mediators Inflamm 2014; 2014:821043. [PMID: 25140116 PMCID: PMC4130149 DOI: 10.1155/2014/821043] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 06/09/2014] [Indexed: 12/27/2022] Open
Abstract
Apoptosis, necroptosis, and pyroptosis are different cellular death programs characterized in organs and tissues as consequence of microbes infection, cell stress, injury, and chemotherapeutics exposure. Dying and death cells release a variety of self-proteins and bioactive chemicals originated from cytosol, nucleus, endoplasmic reticulum, and mitochondria. These endogenous factors are named cell death-associated molecular-pattern (CDAMP), damage-associated molecular-pattern (DAMP) molecules, and alarmins. Some of them cooperate or act as important initial or delayed inflammatory mediators upon binding to diverse membrane and cytosolic receptors coupled to signaling pathways for the activation of the inflammasome platforms and NF-κB multiprotein complexes. Current studies show that the nonprotein thiols and thiol-regulating enzymes as well as highly diffusible prooxidant reactive oxygen and nitrogen species released together in extracellular inflammatory milieu play essential role in controlling pro- and anti-inflammatory activities of CDAMP/DAMP and alarmins. Here, we provide an overview of these emerging concepts and mechanisms of triggering and maintenance of tissue inflammation under massive death of cells.
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Rochette L, Zeller M, Cottin Y, Vergely C. Diabetes, oxidative stress and therapeutic strategies. Biochim Biophys Acta Gen Subj 2014; 1840:2709-29. [PMID: 24905298 DOI: 10.1016/j.bbagen.2014.05.017] [Citation(s) in RCA: 332] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 05/12/2014] [Accepted: 05/27/2014] [Indexed: 02/07/2023]
Abstract
BACKGROUND Diabetes has emerged as a major threat to health worldwide. SCOPE OF REVIEW The exact mechanisms underlying the disease are unknown; however, there is growing evidence that excess generation of reactive oxygen species (ROS), largely due to hyperglycemia, causes oxidative stress in a variety of tissues. Oxidative stress results from either an increase in free radical production, or a decrease in endogenous antioxidant defenses, or both. ROS and reactive nitrogen species (RNS) are products of cellular metabolism and are well recognized for their dual role as both deleterious and beneficial species. In type 2 diabetic patients, oxidative stress is closely associated with chronic inflammation. Multiple signaling pathways contribute to the adverse effects of glucotoxicity on cellular functions. There are many endogenous factors (antioxidants, vitamins, antioxidant enzymes, metal ion chelators) that can serve as endogenous modulators of the production and action of ROS. Clinical trials that investigated the effect of antioxidant vitamins on the progression of diabetic complications gave negative or inconclusive results. This lack of efficacy might also result from the fact that they were administered at a time when irreversible alterations in the redox status are already under way. Another strategy to modulate oxidative stress is to exploit the pleiotropic properties of drugs directed primarily at other targets and thus acting as indirect antioxidants. MAJOR CONCLUSIONS It appears important to develop new compounds that target key vascular ROS producing enzymes and mimic endogenous antioxidants. GENERAL SIGNIFICANCE This strategy might prove clinically relevant in preventing the development and/or retarding the progression of diabetes associated with vascular diseases.
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Affiliation(s)
- Luc Rochette
- Laboratoire de Physiopathologie et Pharmacologie Cardio-Métaboliques, INSERM UMR866, Université de Bourgogne, Facultés de Médecine et Pharmacie, 7 Boulevard Jeanne d'Arc, 21079 Dijon, France.
| | - Marianne Zeller
- Laboratoire de Physiopathologie et Pharmacologie Cardio-Métaboliques, INSERM UMR866, Université de Bourgogne, Facultés de Médecine et Pharmacie, 7 Boulevard Jeanne d'Arc, 21079 Dijon, France
| | - Yves Cottin
- Laboratoire de Physiopathologie et Pharmacologie Cardio-Métaboliques, INSERM UMR866, Université de Bourgogne, Facultés de Médecine et Pharmacie, 7 Boulevard Jeanne d'Arc, 21079 Dijon, France
| | - Catherine Vergely
- Laboratoire de Physiopathologie et Pharmacologie Cardio-Métaboliques, INSERM UMR866, Université de Bourgogne, Facultés de Médecine et Pharmacie, 7 Boulevard Jeanne d'Arc, 21079 Dijon, France
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