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Deo P, Dhillon VS, Thomas P, Fenech M. Oleic Acid Status Positively Correlates with the Soluble Receptor for Advanced Glycation End-Products (sRAGE) in Healthy Adults Who Are Homozygous for G Allele of RAGE G82S Polymorphism. Cells 2023; 12:1662. [PMID: 37371132 DOI: 10.3390/cells12121662] [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: 03/06/2023] [Revised: 06/08/2023] [Accepted: 06/17/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND The soluble form of receptor for advanced glycation end products (sRAGE) have been implicated in the prevention of numerous pathologic states, and highlights as an attractive therapeutic target. Because diets rich in monounsaturated fatty acids (MUFA) reduce postprandial oxidative stress and inflammation that is related to better health during aging, we investigated the association between red blood cell (RBC) fatty acids with circulatory AGE biomarkers and further stratified this correlation based on GG and GA + AA genotype. METHODS A total of 172 healthy participants (median age = 53.74 ± 0.61 years) were recruited for the study. RBC fatty acid was analysed using gas chromatography and sRAGE was measured using a commercial ELISA kit. RESULTS The result showed a non-significant correlation between total MUFA with sRAGE however oleic acid (C18:1) exhibited a positive correlation (r = 0.178, p = 0.01) that remained statistically significant (β = 0.178, p = 0.02) after a stepwise multivariate regression analysis after adjusting for age, BMI and gender. In a univariate analysis, a positive significant correlation between C18:1 and sRAGE in GG genotype (r = 0.169, p = 0.02) and a non-significant correlation with GA + AA genotype (r = 0.192, p = 0.21) was evident. When C18:1 was stratified, a significant difference was observed for oleic acid and G82S polymorphism: low C18:1/GA + AA versus high C18:1/GG (p = 0.015) and high C18:1/GA + AA versus high C18:1/GG (p = 0.02). CONCLUSION Our study suggests that increased levels of C18:1 may be a potential therapeutic approach in increasing sRAGE in those with GG genotype and play a role in modulating AGE metabolism.
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Affiliation(s)
- Permal Deo
- Health and Biomedical Innovation, UniSA Clinical and Health Sciences, University of South Australia, Adelaide 5000, Australia
| | - Varinderpal S Dhillon
- Health and Biomedical Innovation, UniSA Clinical and Health Sciences, University of South Australia, Adelaide 5000, Australia
| | - Philip Thomas
- CSIRO Health and Biosecurity, Adelaide 5000, Australia
| | - Michael Fenech
- Health and Biomedical Innovation, UniSA Clinical and Health Sciences, University of South Australia, Adelaide 5000, Australia
- Genome Health Foundation, North Brighton 5048, Australia
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2
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Kim Y, Park H, Kim Y, Kim SH, Lee JH, Yang H, Kim SJ, Li CM, Lee H, Na DH, Moon S, Shin Y, Kam TI, Lee HW, Kim S, Song JJ, Jung YK. Pathogenic Role of RAGE in Tau Transmission and Memory Deficits. Biol Psychiatry 2022; 93:829-841. [PMID: 36759256 DOI: 10.1016/j.biopsych.2022.10.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 09/19/2022] [Accepted: 10/09/2022] [Indexed: 11/16/2022]
Abstract
BACKGROUND In tauopathies, brain regions with tau accumulation strongly correlate with clinical symptoms, and spreading of misfolded tau along neural network leads to disease progression. However, the underlying mechanisms by which tau proteins enter neurons during pathological propagation remain unclear. METHODS To identify membrane receptors responsible for neuronal propagation of tau oligomers, we established a cell-based tau uptake assay and screened complementary DNA expression library. Tau uptake and propagation were analyzed in vitro and in vivo using a microfluidic device and stereotactic injection. The cognitive function of mice was assessed using behavioral tests. RESULTS From a genome-wide cell-based functional screening, RAGE (receptor for advanced glycation end products) was isolated to stimulate the cellular uptake of tau oligomers. Rage deficiency reduced neuronal uptake of pathological tau prepared from rTg4510 mouse brains or cerebrospinal fluid from patients with Alzheimer's disease and slowed tau propagation between neurons cultured in a 3-chamber microfluidic device. RAGE levels were increased in the brains of rTg4510 mice and tau oligomer-treated neurons. Rage knockout decreased tau transmission in the brains of nontransgenic mice after injection with Alzheimer's disease patient-derived tau and ameliorated memory loss after injection with GFP-P301L-tau-AAV. Treatment of RAGE antagonist FPS-ZM1 blocked transsynaptic tau propagation and inflammatory responses and alleviated cognitive impairment in rTg4510 mice. CONCLUSIONS These results suggest that in neurons and microglia, RAGE binds to pathological tau and facilitates neuronal tau pathology progression and behavioral deficits in tauopathies.
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Affiliation(s)
- Youbin Kim
- Interdisciplinary Program in Neuroscience, Seoul National University, Seoul, Republic of Korea; School of the Biological Sciences, Seoul National University, Seoul, Republic of Korea
| | - Hyejin Park
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Youngwon Kim
- School of the Biological Sciences, Seoul National University, Seoul, Republic of Korea
| | - Seo-Hyun Kim
- School of the Biological Sciences, Seoul National University, Seoul, Republic of Korea
| | - Jae Hoon Lee
- Department of Biochemistry, Yonsei University, Seoul, Republic of Korea
| | - Hanseul Yang
- School of the Biological Sciences, Seoul National University, Seoul, Republic of Korea
| | - Seo Jin Kim
- School of the Biological Sciences, Seoul National University, Seoul, Republic of Korea
| | - Cathena Meiling Li
- School of the Biological Sciences, Seoul National University, Seoul, Republic of Korea
| | - Haneul Lee
- School of the Biological Sciences, Seoul National University, Seoul, Republic of Korea
| | - Do-Hyeong Na
- School of the Biological Sciences, Seoul National University, Seoul, Republic of Korea
| | - Seowon Moon
- School of the Biological Sciences, Seoul National University, Seoul, Republic of Korea
| | - Yumi Shin
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Tae-In Kam
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Han-Woong Lee
- Department of Biochemistry, Yonsei University, Seoul, Republic of Korea
| | - SangYun Kim
- Department of Neurology, Seoul National University Bundang Hospital and Seoul National University College of Medicine, Gyeonggi-do, Republic of Korea
| | - Ji-Joon Song
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Yong-Keun Jung
- Interdisciplinary Program in Neuroscience, Seoul National University, Seoul, Republic of Korea; School of the Biological Sciences, Seoul National University, Seoul, Republic of Korea.
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3
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Downey J, Lam JC, Li VO, Gozes I. Somatic Mutations and Alzheimer’s Disease. J Alzheimers Dis 2022; 90:475-493. [DOI: 10.3233/jad-220643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Alzheimer’s disease (AD) represents a global health challenge, with an estimated 55 million people suffering from the non-curable disease across the world. While amyloid-β plaques and tau neurofibrillary tangles in the brain define AD proteinopathy, it has become evident that diverse coding and non-coding regions of the genome may significantly contribute to AD neurodegeneration. The diversity of factors associated with AD pathogenesis, coupled with age-associated damage, suggests that a series of triggering events may be required to initiate AD. Since somatic mutations accumulate with aging, and aging is a major risk factor for AD, there is a great potential for somatic mutational events to drive disease. Indeed, recent data from the Gozes team/laboratories as well as other leading laboratories correlated the accumulation of somatic brain mutations with the progression of tauopathy. In this review, we lay the current perspectives on the principal genetic factors associated with AD and the potential causes, highlighting the contribution of somatic mutations to the pathogenesis of late onset Alzheimer’s disease. The roles that artificial intelligence and big data can play in accelerating the progress of causal somatic mutation markers/biomarkers identification, and the associated drug discovery/repurposing, have been highlighted for future AD and other neurodegenerative studies, with the aim to bring hope for the vulnerable aging population.
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Affiliation(s)
- Jocelyn Downey
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China
| | - Jacqueline C.K. Lam
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China
- Department of Computer Science and Technology, University of Cambridge, UK
| | - Victor O.K. Li
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China
| | - Illana Gozes
- The Elton Laboratory for Molecular Neuroendocrinology, Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Adams Super Center for Brain Studies and Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
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4
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Diagnostic, Prognostic, and Mechanistic Biomarkers of Diabetes Mellitus-Associated Cognitive Decline. Int J Mol Sci 2022; 23:ijms23116144. [PMID: 35682821 PMCID: PMC9181591 DOI: 10.3390/ijms23116144] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 03/29/2022] [Accepted: 03/29/2022] [Indexed: 01/27/2023] Open
Abstract
Cognitive dysfunctions such as mild cognitive impairment (MCI), Alzheimer’s disease (AD), and other forms of dementia are recognized as common comorbidities of type 2 diabetes mellitus (T2DM). Currently, there are no disease-modifying therapies or definitive clinical diagnostic and prognostic tools for dementia, and the mechanisms underpinning the link between T2DM and cognitive dysfunction remain equivocal. Some of the suggested pathophysiological mechanisms underlying cognitive decline in diabetes patients include hyperglycemia, insulin resistance and altered insulin signaling, neuroinflammation, cerebral microvascular injury, and buildup of cerebral amyloid and tau proteins. Given the skyrocketing global rates of diabetes and neurodegenerative disorders, there is an urgent need to discover novel biomarkers relevant to the co-morbidity of both conditions to guide future diagnostic approaches. This review aims to provide a comprehensive background of the potential risk factors, the identified biomarkers of diabetes-related cognitive decrements, and the underlying processes of diabetes-associated cognitive dysfunction. Aging, poor glycemic control, hypoglycemia and hyperglycemic episodes, depression, and vascular complications are associated with increased risk of dementia. Conclusive research studies that have attempted to find specific biomarkers are limited. However, the most frequent considerations in such investigations are related to C reactive protein, tau protein, brain-derived neurotrophic factor, advanced glycation end products, glycosylated hemoglobin, and adipokines.
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Kinscherf NA, Pehar M. Role and Therapeutic Potential of RAGE Signaling in Neurodegeneration. Curr Drug Targets 2022; 23:1191-1209. [PMID: 35702767 PMCID: PMC9589927 DOI: 10.2174/1389450123666220610171005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/29/2022] [Accepted: 04/29/2022] [Indexed: 01/03/2023]
Abstract
Activation of the receptor for advanced glycation end products (RAGE) has been shown to play an active role in the development of multiple neurodegenerative diseases, including Alzheimer's disease, Parkinson's disease, and Amyotrophic Lateral Sclerosis. Although originally identified as a receptor for advanced glycation end products, RAGE is a pattern recognition receptor able to bind multiple ligands. The final outcome of RAGE signaling is defined in a context and cell type specific manner and can exert both neurotoxic and neuroprotective functions. Contributing to the complexity of the RAGE signaling network, different RAGE isoforms with distinctive signaling capabilities have been described. Moreover, multiple RAGE ligands bind other receptors and RAGE antagonism can significantly affect their signaling. Here, we discuss the outcome of celltype specific RAGE signaling in neurodegenerative pathologies. In addition, we will review the different approaches that have been developed to target RAGE signaling and their therapeutic potential. A clear understanding of the outcome of RAGE signaling in a cell type- and disease-specific manner would contribute to advancing the development of new therapies targeting RAGE. The ability to counteract RAGE neurotoxic signaling while preserving its neuroprotective effects would be critical for the success of novel therapies targeting RAGE signaling.
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Affiliation(s)
- Noah Alexander Kinscherf
- Division of Geriatrics and Gerontology, Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Mariana Pehar
- Division of Geriatrics and Gerontology, Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA.,Geriatric Research Education Clinical Center, Veterans Affairs Medical Center, Madison, WI, USA
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6
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Higbee D, Granell R, Walton E, Korologou-Linden R, Davey Smith G, Dodd J. Examining the possible causal relationship between lung function, COPD and Alzheimer's disease: a Mendelian randomisation study. BMJ Open Respir Res 2021; 8:8/1/e000759. [PMID: 34233891 PMCID: PMC8264898 DOI: 10.1136/bmjresp-2020-000759] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 02/21/2021] [Accepted: 04/16/2021] [Indexed: 11/06/2022] Open
Abstract
Rationale Large retrospective case-control studies have reported an association between chronic obstructive pulmonary disease (COPD), reduced lung function and an increased risk of Alzheimer’s disease. However, it remains unclear if these diseases are causally linked, or due to shared risk factors. Conventional observational epidemiology suffers from unmeasured confounding and reverse causation. Additional analyses addressing causality are required. Objectives To examine a causal relationship between COPD, lung function and Alzheimer’s disease. Methods Using two-sample Mendelian randomisation, we used single nucleotide polymorphisms (SNPs) identified in a genome wide association study (GWAS) for lung function as instrumental variables (exposure). Additionally, we used SNPs discovered in a GWAS for COPD in those with moderate to very severe obstruction. The effect of these SNPs on Alzheimer’s disease (outcome) was taken from a GWAS based on a sample of 24 807 patients and 55 058 controls. Results We found minimal evidence for an effect of either lung function (OR: 1.02 per SD; 95% CI 0.91 to 1.13; p value 0.68) or liability for COPD on Alzheimer’s disease (OR: 0.97 per SD; 95% CI 0.92 to 1.03; p value 0.40). Conclusion Neither reduced lung function nor liability COPD are likely to be causally associated with an increased risk of Alzheimer’s, any observed association is likely due to unmeasured confounding. Scientific attention and health prevention policy may be better focused on overlapping risk factors, rather than attempts to reduce risk of Alzheimer’s disease by targeting impaired lung function or COPD directly.
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Affiliation(s)
- Daniel Higbee
- Academic Respiratory Unit, Southmead Hospital, Bristol, UK.,MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Raquel Granell
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Esther Walton
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK.,Department of Psychology, University of Bath, Bath, Somerset, UK
| | | | | | - James Dodd
- Academic Respiratory Unit, Southmead Hospital, Bristol, UK .,MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
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7
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Deo P, Dhillon VS, Chua A, Thomas P, Fenech M. APOE ε4 Carriers Have a Greater Propensity to Glycation and sRAGE Which Is Further Influenced by RAGE G82S Polymorphism. J Gerontol A Biol Sci Med Sci 2021; 75:1899-1905. [PMID: 31677348 DOI: 10.1093/gerona/glz259] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Indexed: 11/14/2022] Open
Abstract
APOE ε4 allele is an established risk factor for Alzheimer's disease and hypercholesterolemia. However, its association with metabolic and genetic risk factors related to glycation is not clear. We tested the hypothesis that, apart from high plasma cholesterol, APOE ε4 carriers may also have higher advanced glycation end products (AGEs) and total soluble extracellular domain of RAGE (sRAGE) and that these biomarkers may be modified by the common Gly82Ser (G82S) polymorphism (rs2070600) in the RAGE gene. To test this, we measured these biomarkers in 172 healthy cognitively normal individuals, of which 32 were APOE ε4 carriers and 140 noncarriers. APOE ε4 carriers showed higher levels of cholesterol (p < .001), glyoxal (p < .001), fluorescent AGEs (p < .001), Nε-carboxymethyllysine (p < .001) and sRAGE (p = .018) when compared to noncarriers. Furthermore, sRAGE was also higher in those that did not carry the A allele of the RAGE gene that codes for serine instead of glycine (p = .034). Our study indicates that APOE ε4 carriers have a greater propensity to glycation than noncarriers which may further increase their risk for diabetes and dementia. The increased sRAGE levels in APOE ε4 carriers suggests a defensive response against AGEs that may be further influenced by the RAGE G82S polymorphism.
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Affiliation(s)
- Permal Deo
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide
| | - Varinderpal S Dhillon
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide.,CSIRO Health and Biosecurity, Adelaide, Australia
| | - Ann Chua
- CSIRO Health and Biosecurity, Adelaide, Australia.,Student and Academic Services, University of South Australia, Adelaide
| | | | - Michael Fenech
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide.,CSIRO Health and Biosecurity, Adelaide, Australia.,Genome Health Foundation, North Brighton, Australia
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8
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Aglago EK, Rinaldi S, Freisling H, Jiao L, Hughes DJ, Fedirko V, Schalkwijk CG, Weiderpass E, Dahm CC, Overvad K, Eriksen AK, Kyrø C, Boutron-Ruault MC, Rothwell JA, Severi G, Katzke V, Kühn T, Schulze MB, Aleksandrova K, Masala G, Krogh V, Panico S, Tumino R, Naccarati A, Bueno-de-Mesquita B, van Gils CH, Sandanger TM, Gram IT, Skeie G, Quirós JR, Jakszyn P, Sánchez MJ, Amiano P, Huerta JM, Ardanaz E, Johansson I, Harlid S, Perez-Cornago A, Mayén AL, Cordova R, Gunter MJ, Vineis P, Cross AJ, Riboli E, Jenab M. Soluble Receptor for Advanced Glycation End-products (sRAGE) and Colorectal Cancer Risk: A Case-Control Study Nested within a European Prospective Cohort. Cancer Epidemiol Biomarkers Prev 2021; 30:182-192. [PMID: 33082206 DOI: 10.1158/1055-9965.epi-20-0855] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/31/2020] [Accepted: 10/09/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Overexpression of the receptor for advanced glycation end-product (RAGE) has been associated with chronic inflammation, which in turn has been associated with increased colorectal cancer risk. Soluble RAGE (sRAGE) competes with RAGE to bind its ligands, thus potentially preventing RAGE-induced inflammation. METHODS To investigate whether sRAGE and related genetic variants are associated with colorectal cancer risk, we conducted a nested case-control study in the European Prospective Investigation into Cancer and Nutrition (EPIC). Plasma sRAGE concentrations were measured by ELISA in 1,361 colorectal cancer matched case-control sets. Twenty-four SNPs encoded in the genes associated with sRAGE concentrations were available for 1,985 colorectal cancer cases and 2,220 controls. Multivariable adjusted ORs and 95% confidence intervals (CIs) were computed using conditional and unconditional logistic regression for colorectal cancer risk and circulating sRAGE and SNPs, respectively. RESULTS Higher sRAGE concentrations were inversely associated with colorectal cancer (ORQ5vs.Q1, 0.77; 95% CI, 0.59-1.00). Sex-specific analyses revealed that the observed inverse risk association was restricted to men (ORQ5vs.Q1, 0.63; 95% CI, 0.42-0.94), whereas no association was observed in women (ORQ5vs.Q1, 1.00; 95% CI, 0.68-1.48; P heterogeneity for sex = 0.006). Participants carrying minor allele of rs653765 (promoter region of ADAM10) had lower colorectal cancer risk (C vs. T, OR, 0.90; 95% CI, 0.82-0.99). CONCLUSIONS Prediagnostic sRAGE concentrations were inversely associated with colorectal cancer risk in men, but not in women. An SNP located within ADAM10 gene, pertaining to RAGE shedding, was associated with colorectal cancer risk. IMPACT Further studies are needed to confirm our observed sex difference in the association and better explore the potential involvement of genetic variants of sRAGE in colorectal cancer development.
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Affiliation(s)
- Elom K Aglago
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC), Lyon, France
| | - Sabina Rinaldi
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC), Lyon, France
| | - Heinz Freisling
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC), Lyon, France
| | - Li Jiao
- Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - David J Hughes
- Cancer Biology and Therapeutics Group (CBT), Conway Institute, School of Biomolecular and Biomedical Science (SBBS), University College Dublin, Dublin, Ireland
| | - Veronika Fedirko
- Department of Epidemiology, Rollins School of Public Health, Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - Casper G Schalkwijk
- Department of Internal Medicine, CARIM School for Cardiovascular Diseases, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Elisabete Weiderpass
- Office of the Director, International Agency for Research on Cancer (IARC), Lyon, France
| | | | - Kim Overvad
- Department of Public Health, Aarhus University, Aarhus, Denmark
- Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
| | | | - Cecilie Kyrø
- Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Marie-Christine Boutron-Ruault
- CESP, Faculté de Médecine - Université Paris-Saclay, UVSQ, INSERM, Villejuif, Paris, France
- Gustave Roussy, Villejuif, Paris, France
| | - Joseph A Rothwell
- CESP, Faculté de Médecine - Université Paris-Saclay, UVSQ, INSERM, Villejuif, Paris, France
- Gustave Roussy, Villejuif, Paris, France
| | - Gianluca Severi
- CESP, Faculté de Médecine - Université Paris-Saclay, UVSQ, INSERM, Villejuif, Paris, France
- Gustave Roussy, Villejuif, Paris, France
- Department of Statistics, Computer Science and Applications (DISIA), University of Florence, Florence, Italy
| | - Verena Katzke
- German Cancer Research Center (DKFZ), Foundation under Public Law, Heidelberg, Germany
| | - Tilman Kühn
- German Cancer Research Center (DKFZ), Foundation under Public Law, Heidelberg, Germany
| | - Matthias B Schulze
- Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
- Institute of Nutrition Science, University of Potsdam, Nuthetal, Germany
| | - Krasimira Aleksandrova
- Institute of Nutrition Science, University of Potsdam, Nuthetal, Germany
- Nutrition, Immunity and Metabolism Senior Scientist Group, Department of Nutrition and Gerontology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Nuthetal, Germany
| | - Giovanna Masala
- Cancer Risk Factors and Life-Style Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network - ISPRO, Florence, Italy
| | - Vittorio Krogh
- Epidemiology and Prevention Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori Via Venezian, Milano, Italy
| | - Salvatore Panico
- Dipartimento di Medicina Clinica e Chirurgia Federico II University, Naples, Italy
| | - Rosario Tumino
- Department of Cancer Registry and Histopathology, Provincial Health Authority (ASP), Ragusa, Italy
| | - Alessio Naccarati
- Italian Institute for Genomic Medicine (IIGM), c/o IRCCS Candiolo, Candiolo, Torino, Italy
- Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Torino, Italy
| | - Bas Bueno-de-Mesquita
- Department for Determinants of Chronic Diseases (DCD), National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | | | - Torkjel M Sandanger
- Faculty of Health Sciences, Department of Community Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Inger T Gram
- Faculty of Health Sciences, Department of Community Medicine, University of Tromsø, The Arctic University of Norway, Tromsø, Norway
| | - Guri Skeie
- Faculty of Health Sciences, Department of Community Medicine, University of Tromsø, The Arctic University of Norway, Tromsø, Norway
| | | | - Paula Jakszyn
- Unit of Nutrition and Cancer, Cancer Epidemiology Research Programme, Catalan Institute of Oncology (ICO-IDIBELL), Barcelona, Spain
- Blanquerna School of Health Sciences, Ramon Llull University, Barcelona, Spain
| | - Maria-Jose Sánchez
- Escuela Andaluza de Salud Pública (EASP), Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Department of Preventive Medicine and Public Health, University of Granada, Granada, Spain
| | - Pilar Amiano
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Public Health Division of Gipuzkoa, BioDonostia Research Institute, Donostia-San Sebastian, Spain
| | - José María Huerta
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Department of Epidemiology, Murcia Regional Health Council, IMIB-Arrixaca, Murcia, Spain
| | - Eva Ardanaz
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Navarra Public Health Institute, Pamplona, Spain
- IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | - Ingegerd Johansson
- Department of Radiation Sciences, Oncology, Umeå University, Umeå, Sweden
| | - Sophia Harlid
- Department of Radiation Sciences, Oncology, Umeå University, Umeå, Sweden
| | - Aurora Perez-Cornago
- Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, England, United Kingdom
| | - Ana-Lucia Mayén
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC), Lyon, France
| | - Reynalda Cordova
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC), Lyon, France
| | - Marc J Gunter
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC), Lyon, France
| | - Paolo Vineis
- School of Public Health, Imperial College London, London, England, United Kingdom
| | - Amanda J Cross
- School of Public Health, Imperial College London, London, England, United Kingdom
| | - Elio Riboli
- School of Public Health, Imperial College London, London, England, United Kingdom
| | - Mazda Jenab
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC), Lyon, France.
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9
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C RC, Lukose B, Rani P. G82S RAGE polymorphism influences amyloid-RAGE interactions relevant in Alzheimer's disease pathology. PLoS One 2020; 15:e0225487. [PMID: 33119615 PMCID: PMC7595441 DOI: 10.1371/journal.pone.0225487] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 09/05/2020] [Indexed: 11/18/2022] Open
Abstract
Receptor for advanced glycation end products (RAGE) has been implicated in the pathophysiology of Alzheimers disease(AD) due to its ability to bind amyloid-beta (Aβ42) and mediate inflammatory response. G82S RAGE polymorphism is associated with AD but the molecular mechanism for this association is not understood. Our previous in silico study indicated a higher binding affinity for mutated G82S RAGE, which could be caused due to changes in N linked glycosylation at residue N81. To confirm this hypothesis, in the present study molecular dynamics (MD) simulations were used to simulate the wild type (WT) and G82S glycosylated structures of RAGE to identify the global structural changes and to find the binding efficiency with Aβ42 peptide. Binding pocket analysis of the MD trajectory showed that cavity/binding pocket in mutant G82S glycosylated RAGE variants is more exposed and accessible to external ligands compared to WT RAGE, which can enhance the affinity of RAGE for Aβ. To validate the above concept, an in vitro binding study was carried using SHSY5Y cell line expressing recombinant WT and mutated RAGE variant individually to which HiLyte Fluor labeled Aβ42 was incubated at different concentrations. Saturated binding kinetics method was adopted to determine the Kd values for Aβ42 binding to RAGE. The Kd value for Aβ42- WT and Aβ42-mutant RAGE binding were 92±40 nM (95% CI-52 to 152nM; R2-0.92) and 45±20 nM (95% CI -29 to 64nM; R2-0.93), respectively. The Kd value of <100nM observed for both variants implicates RAGE as a high-affinity receptor for Aβ42 and mutant RAGE has higher affinity compared to WT. The alteration in binding affinity is responsible for activation of the inflammatory pathway as implicated by enhanced expression of TNFα and IL6 in mutant RAGE expressing cell line which gives a mechanistic view for the G82S RAGE association with AD.
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Affiliation(s)
- Rani Cathrine. C
- Department of Biotechnology, PSG College of Technology, Coimbatore, Tamil Nadu, India
| | - Bincy Lukose
- Department of Biotechnology, PSG College of Technology, Coimbatore, Tamil Nadu, India
| | - P. Rani
- Department of Biotechnology, PSG College of Technology, Coimbatore, Tamil Nadu, India
- * E-mail:
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10
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Steenbeke M, De Bruyne S, De Buyzere M, Lapauw B, Speeckaert R, Petrovic M, Delanghe JR, Speeckaert MM. The role of soluble receptor for advanced glycation end-products (sRAGE) in the general population and patients with diabetes mellitus with a focus on renal function and overall outcome. Crit Rev Clin Lab Sci 2020; 58:113-130. [PMID: 32669010 DOI: 10.1080/10408363.2020.1791045] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Isoforms of the receptor for advanced glycation end-product (RAGE) protein, which lack the transmembrane and the signaling (soluble RAGE or sRAGE) domains are hypothesized to counteract the detrimental action of the full-length receptor by acting as a decoy, and they provide a potential tool to treat RAGE-associated diseases. Multiple studies have explored the relationship between sRAGE and endogenous secretory RAGE and its polymorphism and obesity, metabolic syndrome, atherosclerosis, kidney function, and increased mortality in the general population. In addition, sRAGE may be a key player in the pathogenesis of diabetes mellitus and its microvascular (e.g. kidney disease) as well as macrovascular (e.g. cardiovascular disease) complications. In this review, we focus on the role of sRAGE as a biomarker in these specific areas. As there is a lack of an underlying unifying hypothesis about how sRAGE changes according to the disease condition or risk factor, there is a call to incorporate all three players of the AGE-RAGE axis into a new universal biomarker/risk marker: (AGE + RAGE)/sRAGE. However, the measurement of RAGE in humans is not practical as it is a cell-bound receptor for which tissue is required for analysis. A high AGE/sRAGE ratio may be a valuable alternative and practical universal biomarker/risk marker for diseases associated with the AGE-RAGE axis, irrespective of low or high serum sRAGE concentrations.
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Affiliation(s)
- Mieke Steenbeke
- Department of Nephrology, Ghent University Hospital, Ghent, Belgium
| | - Sander De Bruyne
- Department of Clinical Chemistry, Ghent University Hospital, Ghent, Belgium
| | - Marc De Buyzere
- Department of Internal Medicine, Ghent University, Ghent, Belgium
| | - Bruno Lapauw
- Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
| | | | - Mirko Petrovic
- Department of Geriatrics, Ghent University Hospital, Ghent, Belgium
| | - Joris R Delanghe
- Department of Diagnostic Sciences, Ghent University, Ghent, Belgium
| | - Marijn M Speeckaert
- Department of Nephrology, Ghent University Hospital, Ghent, Belgium.,Research Foundation Flanders, Brussels, Belgium
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11
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Kim OY, Song J. The importance of BDNF and RAGE in diabetes-induced dementia. Pharmacol Res 2020; 160:105083. [PMID: 32679182 DOI: 10.1016/j.phrs.2020.105083] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/30/2020] [Accepted: 07/12/2020] [Indexed: 01/11/2023]
Abstract
Diabetes-induced dementia is an emerging neurodisorder all over the world. The prevalence rates of dementia and diabetes have been gradually increasing worldwide. Diabetes has been known to lead to oxidative stress, inflammation aggravation, and hyperglycemia conditions in the brain. Various diabetic implications cause the lower secretion of brain-derived neurotrophic factor (BDNF) and the increase of receptor for advanced glycation end products (RAGE), ultimately leading to both cerebrovascular dysfunction and cognitive decline. Here, we summarized the significant evidences highlighting the specific mechanisms between BDNF and RAGE and cerebrovascular dysfunction and memory function and how these relate to diabetes-induced dementia. Especially, we review that the association between BDFN and RAGE in neuroinflammation, the reduction of long-term potentiation, and the vascular implications in brain.
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Affiliation(s)
- Oh Yoen Kim
- The Department of Food Science and Nutrition, Dong-A University, Busan 49315, Republic of Korea; The Center for Silver-Targeted Biomaterials, Brain Busan 21 Plus Program, Graduate School, Dong-A University, Busan 49315, Republic of Korea.
| | - Juhyun Song
- The Department of Anatomy, Chonnam National University, Chonnam National University Medical School, Hwasun 58128, Jeollanam-do, Republic of Korea.
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12
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MacLean M, Derk J, Ruiz HH, Juranek JK, Ramasamy R, Schmidt AM. The Receptor for Advanced Glycation End Products (RAGE) and DIAPH1: Implications for vascular and neuroinflammatory dysfunction in disorders of the central nervous system. Neurochem Int 2019; 126:154-164. [PMID: 30902646 PMCID: PMC10976457 DOI: 10.1016/j.neuint.2019.03.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 03/13/2019] [Accepted: 03/16/2019] [Indexed: 12/11/2022]
Abstract
The Receptor for Advanced Glycation End Products (RAGE) is expressed by multiple cell types in the brain and spinal cord that are linked to the pathogenesis of neurovascular and neurodegenerative disorders, including neurons, glia (microglia and astrocytes) and vascular cells (endothelial cells, smooth muscle cells and pericytes). Mounting structural and functional evidence implicates the interaction of the RAGE cytoplasmic domain with the formin, Diaphanous1 (DIAPH1), as the key cytoplasmic hub for RAGE ligand-mediated activation of cellular signaling. In aging and diabetes, the ligands of the receptor abound, both in the central nervous system (CNS) and in the periphery. Such accumulation of RAGE ligands triggers multiple downstream events, including upregulation of RAGE itself. Once set in motion, cell intrinsic and cell-cell communication mechanisms, at least in part via RAGE, trigger dysfunction in the CNS. A key outcome of endothelial dysfunction is reduction in cerebral blood flow and increased permeability of the blood brain barrier, conditions that facilitate entry of activated leukocytes into the CNS, thereby amplifying primary nodes of CNS cellular stress. This contribution details a review of the ligands of RAGE, the mechanisms and consequences of RAGE signal transduction, and cites multiple examples of published work in which RAGE contributes to the pathogenesis of neurovascular perturbation. Insights into potential therapeutic modalities targeting the RAGE signal transduction axis for disorders of CNS vascular dysfunction and neurodegeneration are also discussed.
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Affiliation(s)
- Michael MacLean
- Diabetes Research Program, Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University School of Medicine, New York, NY, 10016, USA
| | - Julia Derk
- Diabetes Research Program, Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University School of Medicine, New York, NY, 10016, USA
| | - Henry H Ruiz
- Diabetes Research Program, Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University School of Medicine, New York, NY, 10016, USA
| | - Judyta K Juranek
- Diabetes Research Program, Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University School of Medicine, New York, NY, 10016, USA
| | - Ravichandran Ramasamy
- Diabetes Research Program, Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University School of Medicine, New York, NY, 10016, USA
| | - Ann Marie Schmidt
- Diabetes Research Program, Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University School of Medicine, New York, NY, 10016, USA.
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13
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Pathological Implications of Receptor for Advanced Glycation End-Product ( AGER) Gene Polymorphism. DISEASE MARKERS 2019; 2019:2067353. [PMID: 30863465 PMCID: PMC6378764 DOI: 10.1155/2019/2067353] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 01/01/2019] [Accepted: 01/15/2019] [Indexed: 12/12/2022]
Abstract
The receptor for advanced glycation end-products (RAGE) is a cell surface transmembrane multiligand receptor, encoded by the AGER gene. RAGE presents many transcripts, is expressed mainly in the lung, and involves multiple pathways (such as NFκB, Akt, p38, and MAP kinases) that initiate and perpetuate an unfavorable proinflammatory state. Due to these numerous functional activities, RAGE is implicated in multiple diseases. AGER is a highly polymorphic gene, with polymorphisms or SNP (single-nucleotide polymorphism) that could be responsible or co-responsible for disease development. This review was designed to shed light on the pathological implications of AGER polymorphisms. Five polymorphisms are described: rs2070600, rs1800624, rs1800625, rs184003, and a 63 bp deletion. The rs2070600 SNP may be associated with the development of human autoimmune disease, diabetes complications, cancer, and lung diseases such as chronic obstructive pulmonary disease and acute respiratory distress syndrome. The rs1800624 SNP involves AGER gene regulation and may be related to reduced risk of heart disease, cancer, Crohn's disease, and type 1 diabetes complications. The rs1800625 SNP may be associated with the development of diabetic retinopathy, cancer, and lupus but may be protective against cardiovascular risk. The rs184003 SNP seems related to coronary artery disease, breast cancer, and diabetes. The 63 bp deletion may be associated with reduced survival from heart diseases during diabetic nephropathy. Here, these potential associations between AGER polymorphisms and the development of diseases are discussed, as there have been conflicting findings on the pathological impact of AGER SNPs in the literature. These contradictory results might be explained by distinct AGER SNP frequencies depending on ethnicity.
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Ataç ZS, Alaylıoğlu M, Dursun E, Gezen-Ak D, Yılmazer S, Gürvit H. G82S polymorphism of receptor for advanced glycation end products gene and serum soluble RAGE levels in mild cognitive impairment and dementia of Alzheimer's type patients in Turkish population. J Clin Neurosci 2018; 59:197-201. [PMID: 30389362 DOI: 10.1016/j.jocn.2018.10.072] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 10/15/2018] [Indexed: 01/11/2023]
Abstract
Alzheimer's disease (AD) is a chronic, neurodegenaration resulting in progressive cognitive decline leading to dementia. Mild cognitive impairment (MCI) is also a clinical definition of cognitive decline without functional impairment. Receptor for advanced glycation end products (RAGE) is one of the neuronal membrane receptors that binds amyloid beta peptide (Aβ) triggering Aβ-related pathologic signalling mechanisms. Soluble RAGE (sRAGE) is the soluble isoform of RAGE and it collects peripheral Aβ by acting as a sink, prevents both RAGE-AGE interaction and transfer of Aβ into brain. In this study, an association was investigated in Turkish cohorts of patients with dementia with Alzheimer's Type (DAT) and MCI patients by measuring serum sRAGE levels and by genotyping G82S polymorphism and comparing them to healthy control (HC) subjects. Although the serum sRAGE levels showed a decreasing manner among the groups, these differences were not statistically significant (p = 0.2). This is the first study for Turkish population.
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Affiliation(s)
- Zehra Simin Ataç
- Department of Neuroscience, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Merve Alaylıoğlu
- Department of Medical Biology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Erdinç Dursun
- Department of Medical Biology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Duygu Gezen-Ak
- Department of Medical Biology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Selma Yılmazer
- Department of Medical Biology, Faculty of Medicine, Altınbaş University, Istanbul, Turkey
| | - Hakan Gürvit
- Behavioral Neurology and Movement Disorders Unit, Department of Neurology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey.
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Câmara AB, de Souza ID, Dalmolin RJS. Sunlight Incidence, Vitamin D Deficiency, and Alzheimer's Disease. J Med Food 2018; 21:841-848. [DOI: 10.1089/jmf.2017.0130] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Alice Barros Câmara
- Bioinformatics Multidisciplinary Environment, IMD, Federal University of Rio Grande do Norte, Natal, Brazil
| | - Iara Dantas de Souza
- Bioinformatics Multidisciplinary Environment, IMD, Federal University of Rio Grande do Norte, Natal, Brazil
| | - Rodrigo Juliani Siqueira Dalmolin
- Bioinformatics Multidisciplinary Environment, IMD, Federal University of Rio Grande do Norte, Natal, Brazil
- Department of Biochemistry, CB, Federal University of Rio Grande do Norte, Natal, Brazil
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Zhao X, Han Q, Lv Y, Sun L, Gang X, Wang G. Biomarkers for cognitive decline in patients with diabetes mellitus: evidence from clinical studies. Oncotarget 2017; 9:7710-7726. [PMID: 29484146 PMCID: PMC5800938 DOI: 10.18632/oncotarget.23284] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 10/30/2017] [Indexed: 12/26/2022] Open
Abstract
Diabetes mellitus is considered as an important factor for cognitive decline and dementia in recent years. However, cognitive impairment in diabetic patients is often underestimated and kept undiagnosed, leading to thousands of diabetic patients suffering from worsening memory. Available reviews in this field were limited and not comprehensive enough. Thus, the present review aimed to summarize all available clinical studies on diabetic patients with cognitive decline, and to find valuable biomarkers that might be applied as diagnostic and therapeutic targets of cognitive impairment in diabetes. The biomarkers or risk factors of cognitive decline in diabetic patients could be classified into the following three aspects: serum molecules or relevant complications, functional or metabolic changes by neuroimaging tools, and genetic variants. Specifically, factors related to poor glucose metabolism, insulin resistance, inflammation, comorbid depression, micro-/macrovascular complications, adipokines, neurotrophic molecules and Tau protein presented significant changes in diabetic patients with cognitive decline. Besides, neuroimaging platform could provide more clues on the structural, functional and metabolic changes during the cognitive decline progression of diabetic patients. Genetic factors related to cognitive decline showed inconsistency based on the limited studies. Future studies might apply above biomarkers as diagnostic and treatment targets in a large population, and regulation of these parameters might shed light on a more valuable, sensitive and specific strategy for the diagnosis and treatment of cognitive decline in diabetic patients.
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Affiliation(s)
- Xue Zhao
- Department of Endocrinology and Metabolism, The First Hospital of Jilin University, Changchun, 130021, Jilin Province, China
| | - Qing Han
- Hospital of Orthopedics, The Second Hospital of Jilin University, Changchun, 130021, Jilin Province, China
| | - You Lv
- Department of Endocrinology and Metabolism, The First Hospital of Jilin University, Changchun, 130021, Jilin Province, China
| | - Lin Sun
- Department of Endocrinology and Metabolism, The First Hospital of Jilin University, Changchun, 130021, Jilin Province, China
| | - Xiaokun Gang
- Department of Endocrinology and Metabolism, The First Hospital of Jilin University, Changchun, 130021, Jilin Province, China
| | - Guixia Wang
- Department of Endocrinology and Metabolism, The First Hospital of Jilin University, Changchun, 130021, Jilin Province, China
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Takeshita Y, Shibata N, Kasanuki K, Nagata T, Shinagawa S, Kobayashi N, Ohnuma T, Suzuki A, Kawai E, Takayama T, Nishioka K, Motoi Y, Hattori N, Nakayama K, Yamada H, Arai H. Genetic association between RAGE polymorphisms and Alzheimer's disease and Lewy body dementias in a Japanese cohort: a case-control study. Int J Geriatr Psychiatry 2017; 32:1241-1246. [PMID: 27699858 DOI: 10.1002/gps.4600] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 09/09/2016] [Accepted: 09/12/2016] [Indexed: 11/06/2022]
Abstract
BACKGROUND/AIMS Interaction of receptor for advanced glycation end products (RAGE) with amyloid-β increases amplification of oxidative stress and plays pathological roles in Alzheimer's disease (AD). Oxidative stress leads to α-synuclein aggregation and is also a major contributing factor in the pathogenesis of Lewy body dementias (LBDs). Therefore, we aimed to investigate whether RAGE gene polymorphisms were associated with AD and LBDs. METHODS Four single nucleotide polymorphisms (SNPs)-rs1800624, rs1800625, rs184003, and rs2070600-of the gene were analyzed using a case-control study design comprising 288 AD patients, 76 LBDs patients, and 105 age-matched controls. RESULTS Linkage disequilibrium (LD) examination showed strong LD from rs1800624 to rs2070600 on the gene (1.1 kb) in our cases in Japan. Rs184003 was associated with an increased risk of AD. Although there were no statistical associations for the other three SNPs, haplotypic analyses detected genetic associations between AD and the RAGE gene. Although relatively few cases were studied, results from the SNPs showed that they did not modify the risk of developing LBDs in the Japanese population. CONCLUSION Our findings suggested that polymorphisms in the RAGE gene are involved in genetic susceptibility to AD. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Yoshihide Takeshita
- Department of Psychiatry, Juntendo University School of Medicine, Tokyo, Japan
| | - Nobuto Shibata
- Department of Psychiatry, Juntendo University School of Medicine, Tokyo, Japan
| | - Koji Kasanuki
- Department of Psychiatry, Juntendo University School of Medicine, Tokyo, Japan
| | - Tomoyuki Nagata
- Department of Psychiatry, Jikei University School of Medicine, Tokyo, Japan.,Division of Molecular Genetics, Institute of DNA Medicine, Jikei University School of Medicine, Tokyo, Japan
| | | | - Nobuyuki Kobayashi
- Department of Psychiatry, Jikei University School of Medicine, Tokyo, Japan
| | - Tohru Ohnuma
- Department of Psychiatry, Juntendo University School of Medicine, Tokyo, Japan
| | - Ayako Suzuki
- Department of Psychiatry, Juntendo University School of Medicine, Tokyo, Japan
| | - Eri Kawai
- Department of Psychiatry, Juntendo University School of Medicine, Tokyo, Japan
| | - Toshiki Takayama
- Department of Psychiatry, Juntendo University School of Medicine, Tokyo, Japan
| | - Kenya Nishioka
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Yumiko Motoi
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Nobutaka Hattori
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazuhiko Nakayama
- Department of Psychiatry, Jikei University School of Medicine, Tokyo, Japan
| | - Hisashi Yamada
- Division of Molecular Genetics, Institute of DNA Medicine, Jikei University School of Medicine, Tokyo, Japan
| | - Heii Arai
- Department of Psychiatry, Juntendo University School of Medicine, Tokyo, Japan
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Gao J, Deng L, Wang Y, Shi Y, Xiao X, Zheng X, Ren H, Xu D. Relationship between RAGE gene polymorphisms and cardiovascular disease prognosis in the Chinese Han population. Mol Genet Genomics 2017; 292:1139-1149. [PMID: 28660308 DOI: 10.1007/s00438-017-1341-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 06/20/2017] [Indexed: 01/31/2023]
Abstract
Cardiovascular disease (CVD) is the leading cause of death in China. This study aimed to investigate whether RAGE gene polymorphisms are associated with the prognosis of various cardiovascular diseases in the Chinese Han population. This study was conducted from July 2004 to December 2005 and a total of 425 subjects from Guangdong province were enrolled. Genotyping of the three polymorphisms (-429T/C, 1704G/T, and G82S) in the RAGE gene was performed with polymerase chain reaction/restriction fragment length polymorphism (PCR-RFLP). Patients were followed for 6.5 years to watch for the development of cardiovascular events and mortality. Subjects with the S mutation of the G82S polymorphism had a significantly higher risk of all-cause mortality and acute myocardial infarction (AMI) than did those with wild-type homozygosity. Logistic regression analysis and Kaplan-Meier analysis all revealed that the G82S polymorphism of the RAGE gene was associated with a significantly increased risk of all-cause mortality and AMI. However, the -429T/C and 1704G/T polymorphisms were not shown to have any effect on prognosis. In conclusion, the G82S variant of the RAGE gene was significantly associated with an increased risk of all-cause mortality and AMI in the Chinese Han population.
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Affiliation(s)
- Jinxiong Gao
- Department of Cardiology, Nanfang Hospital, Southern Medical University, 1838 Northern Guangzhou Ave, Guangzhou, 510515, Guangdong, China.,Department of Cardiology, Boai Hospital of Zhongshan, Zhongshan, China
| | - Liehua Deng
- Department of Cardiology, Nanfang Hospital, Southern Medical University, 1838 Northern Guangzhou Ave, Guangzhou, 510515, Guangdong, China
| | - Ying Wang
- Department of Cardiology, Boai Hospital of Zhongshan, Zhongshan, China
| | - Yanke Shi
- Department of Cardiology, Boai Hospital of Zhongshan, Zhongshan, China
| | - Xiaohua Xiao
- Department of Cardiology, Boai Hospital of Zhongshan, Zhongshan, China
| | - Xueou Zheng
- Department of Cardiology, Nanfang Hospital, Southern Medical University, 1838 Northern Guangzhou Ave, Guangzhou, 510515, Guangdong, China
| | - Hao Ren
- Department of Rheumatology, Nanfang Hospital, Southern Medical University, 1838 Northern Guangzhou Ave, Guangzhou, 510515, Guangdong, China.
| | - Dingli Xu
- Department of Cardiology, Nanfang Hospital, Southern Medical University, 1838 Northern Guangzhou Ave, Guangzhou, 510515, Guangdong, China.
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Wang ZX, Wan Y, Tan L, Liu J, Wang HF, Sun FR, Tan MS, Tan CC, Jiang T, Tan L, Yu JT. Genetic Association of HLA Gene Variants with MRI Brain Structure in Alzheimer’s Disease. Mol Neurobiol 2016; 54:3195-3204. [DOI: 10.1007/s12035-016-9889-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 03/28/2016] [Indexed: 12/20/2022]
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20
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Polymorphisms in the receptor for advanced glycation end products gene are associated with susceptibility to drug-resistant epilepsy. Neurosci Lett 2016; 619:137-41. [DOI: 10.1016/j.neulet.2016.01.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 12/21/2015] [Accepted: 01/25/2016] [Indexed: 01/14/2023]
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21
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Wang P, Huang R, Lu S, Xia W, Cai R, Sun H, Wang S. RAGE and AGEs in Mild Cognitive Impairment of Diabetic Patients: A Cross-Sectional Study. PLoS One 2016; 11:e0145521. [PMID: 26745632 PMCID: PMC4706319 DOI: 10.1371/journal.pone.0145521] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 12/05/2015] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE Receptor for advanced glycation end products (AGEs; RAGE) binds to both AGEs and amyloid-beta peptides. RAGE is involved in chronic complications of type 2 diabetes and Alzheimer's disease. We aimed to investigate the roles of RAGE, AGEs and the Gly82Ser polymorphism of RAGE in mild cognitive impairment (MCI) among type 2 diabetes patients. METHODS Of the 167 hospitalized type 2 diabetes patients recruited, 82 satisfied the diagnostic criteria for MCI, and 85 matched control individuals were classified as non-MCI. Demographic data were collected, and the soluble RAGE (sRAGE) concentrations, serum AGE-peptide (AGE-P) levels, RAGE Gly82Ser genotype and neuropsychological test results were examined. RESULTS The MCI group exhibited a decreased sRAGE level (0.87±0.35 vs. 1.05±0.52 ng/ml, p<0.01) and an increased serum AGE-P level (3.54±1.27 vs. 2.71±1.18 U/ml, p<0.01) compared with the control group. Logistic regression analysis indicated that each unit reduction in the sRAGE concentration increased the MCI risk by 54% (OR 0.46[95% CI 0.22-0.96], p = 0.04) and that each unit increase in the AGE-P level increased the MCI risk by 72% in the type 2 diabetes patients (OR 1.72[95% CI 1.31-2.28], p<0.01). The serum sRAGE level was negatively correlated with the score on the trail making test-B (TMT-B) (r = -0.344, p = 0.002), which indicates early cognitive deficits related to diabetes. Moreover, the AGE-P level was positively correlated with multiple cognitive domains (all p<0.05). No significant differences in the neuropsychological test results or serum RAGE concentrations between the different RAGE genotypes or in the RAGE genotype frequencies between the MCI and control groups were identified (all p>0.05). CONCLUSIONS The RAGE pathway partially mediates AGE-induced MCI in diabetic patients. The serum AGE-P level may serve as a serum biomarker of MCI in these individuals, and sRAGE represents a predictor and even a potential intervention target of early cognitive decline in type 2 diabetes patients. TRIAL REGISTRATION Advanced Glycation End Products Induced Cognitive Impairment in Diabetes: BDNF Signal Meditated Hippocampal Neurogenesis ChiCTR-OCC-15006060.
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Affiliation(s)
- Pin Wang
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China
| | - Rong Huang
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China
| | - Sen Lu
- Department of the Intensive Care Unit, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, Sichuan Province, PR China
| | - Wenqing Xia
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China
| | - Rongrong Cai
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China
| | - Haixia Sun
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China
| | - Shaohua Wang
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China
- * E-mail:
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22
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Juranek JK, Daffu GK, Wojtkiewicz J, Lacomis D, Kofler J, Schmidt AM. Receptor for Advanced Glycation End Products and its Inflammatory Ligands are Upregulated in Amyotrophic Lateral Sclerosis. Front Cell Neurosci 2015; 9:485. [PMID: 26733811 PMCID: PMC4686801 DOI: 10.3389/fncel.2015.00485] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 11/30/2015] [Indexed: 12/12/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal motor neuron disorder of largely unknown pathogenesis. Recent studies suggest that enhanced oxidative stress and neuroinflammation contribute to the progression of the disease. Mounting evidence implicates the receptor for advanced glycation end-products (RAGE) as a significant contributor to the pathogenesis of certain neurodegenerative diseases and chronic conditions. It is hypothesized that detrimental actions of RAGE are triggered upon binding to its ligands, such as AGEs (advanced glycation end products), S100/calgranulin family members, and High Mobility Group Box-1 (HMGB1) proteins. Here, we examined the expression of RAGE and its ligands in human ALS spinal cord. Tissue samples from age-matched human control and ALS spinal cords were tested for the expression of RAGE, carboxymethyllysine (CML) AGE, S100B, and HMGB1, and intensity of the immunofluorescent and immunoblotting signals was assessed. We found that the expression of both RAGE and its ligands was significantly increased in the spinal cords of ALS patients versus age-matched control subjects. Our study is the first report describing co-expression of both RAGE and its ligands in human ALS spinal cords. These findings suggest that further probing of RAGE as a mechanism of neurodegeneration in human ALS is rational.
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Affiliation(s)
- Judyta K Juranek
- Department of Surgery, Columbia University Medical CenterNew York, NY, USA; Department of Medicine, New York University Langone Medical Center - New York University School of MedicineNew York, NY, USA
| | - Gurdip K Daffu
- Department of Medicine, New York University Langone Medical Center - New York University School of Medicine New York, NY, USA
| | - Joanna Wojtkiewicz
- Department of Pathophysiology, University of Warmia and Mazury Olsztyn, Poland
| | - David Lacomis
- Department of Neurology, University of Pittsburgh Pittsburgh, PA, USA
| | - Julia Kofler
- Department of Pathology, University of Pittsburgh Pittsburgh, PA, USA
| | - Ann Marie Schmidt
- Department of Surgery, Columbia University Medical CenterNew York, NY, USA; Department of Medicine, New York University Langone Medical Center - New York University School of MedicineNew York, NY, USA
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Genetics of Plasma Soluble Receptor for Advanced Glycation End-Products and Cardiovascular Outcomes in a Community-based Population: Results from the Atherosclerosis Risk in Communities Study. PLoS One 2015; 10:e0128452. [PMID: 26083729 PMCID: PMC4471120 DOI: 10.1371/journal.pone.0128452] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 04/27/2015] [Indexed: 12/17/2022] Open
Abstract
Plasma soluble Receptor for Advanced Glycation End-products (sRAGE) is a strong marker of vascular outcomes although evidence on the direction of association is mixed. Compared to whites, blacks have lower levels of sRAGE. We hypothesized that genetic determinants of sRAGE would help clarify the causal role of sRAGE and the black-white difference in sRAGE levels. We conducted a genome-wide analysis of sRAGE in whites and blacks from the Atherosclerosis Risk in Communities Study. Median plasma sRAGE levels were lower in blacks than whites (728 vs. 1067 pg/ml; P<0.0001). The T (vs. C) allele of rs2070600, a missense variant in AGER, the gene encoding RAGE, was associated with approximately 50% lower sRAGE levels in both whites (N = 1,737; P = 7.26x10-16; minor allele frequency (MAF) = 0.04) and blacks (N = 581; P = 0.02; MAF = 0.01). In blacks, the T (vs. C) allele of rs2071288, intronic to AGER, was associated with 43% lower sRAGE levels (P = 2.22x10-8; MAF = 0.10) and was nearly absent in whites. These AGER SNPs explained 21.5% and 26% of the variation in sRAGE in blacks and whites, respectively, but did not explain the black-white difference in sRAGE. These SNPs were not significantly associated with incident death, coronary heart disease, diabetes, heart failure, or chronic kidney disease in whites (N = 8,130–9,017) or blacks (N = 2,293–2,871) (median follow up ~20 years). We identified strong genetic determinants of sRAGE that did not explain the large black-white difference in sRAGE levels or clearly influence risk of clinical outcomes, suggesting that sRAGE may not be a causal factor in development of these outcomes.
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Chen Y, Huang J, Hu C, Hua K. Relationship of advanced glycation end products and their receptor to pelvic organ prolapse. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2015; 8:2288-2299. [PMID: 26045736 PMCID: PMC4440045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 02/27/2015] [Indexed: 06/04/2023]
Abstract
OBJECTIVE The aims of this study are to detect levels of AGEs and RAGE and SNPs for RAGE in vaginal tissues of women with POP and rats in a repair location, and to explore the relationship between AGEs-RAGE pathway and POP. METHODS This study involved human vaginal tissues in fornix from 44 women with POP and 46 women without POP who were assigned to pelvic floor reconstruction or LAVH. The proteins of AGEs, collagen I, and RAGE were detected by immunohistochemistry and Western blot with appropriate primary antibodies. The entire RAGE gene of 24 women with POP and 25 controls were sequenced, and SNPs within were detected. Then, sixty 8-week-old female Sprague-Dawley rats subjected to abdominal defect were divided into three surgical pelvic floor reconstruction repair groups (n=20/group): A, repair with non-absorable prolene mesh; B, repair with absorbable SIS mesh; and C, a no repair control group. 3, 9, 15, and 21 months after operation, rats were sacrificed and the expression of AGEs, RAGE and collagen I in the tissues of repair location were detected in the various experimental groups. Statistical analysis included comparison of means (Student's t-test) and proportions (Chi-square test or Fisher test). RESULTS By both immunohistochemistry and Western blot, patients with POP showed higher protein expression of AGEs of POP than controls (P<0.05). In contrast, the expression of collagen I was lower in POP patients than in the control group (P<0.05). No differences in the expression of RAGE between the POP patients and controls were observed (P>0.05). In POP patients, the expression of collagen I decreased particularly in patients≥60 years old (P<0.05), but there were no different in the expression of AGEs and RAGE dependent on age (P>0.05). RAGE gene sequence variance analysis identified 18 variable loci, but only two of these were potential SNPs: rs184003 (1806), rs55640627 (2346) (P<0.05). Both rs184003 and rs55640627 are both intronic variants, indicating that they may not influence the structure of RAGE. In rat surgical repair model, group B showed a greater extent of abdominal prolapse than groups A and C (P<0.05). Consistent with this, the expression of AGEs in group B was higher than groups A and C (P<0.05), and collagen I in group B was lower than the two others, further supporting our notion that AGEs are inversely related to type I collagen content. CONCLUSIONS In summary, this study demonstrates that AGEs and RAGE might play important roles in the physiopathology of POP. Further studies are required to explore mechanisms of how AGEs-RAGE pathway may contribute to tissue degeneration and fragility in POP.
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Affiliation(s)
- Yisong Chen
- Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan UniversityShanghai 200011, China
| | - Jian Huang
- Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan UniversityShanghai 200011, China
| | - Changdong Hu
- Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan UniversityShanghai 200011, China
| | - Keqin Hua
- Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan UniversityShanghai 200011, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related DiseasesShanghai 200011, China
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Gaur S, Agnihotri R. Alzheimer's disease and chronic periodontitis: is there an association? Geriatr Gerontol Int 2014; 15:391-404. [PMID: 25511390 DOI: 10.1111/ggi.12425] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/10/2014] [Indexed: 12/17/2022]
Abstract
Alzheimer's disease, an affliction of old age, is one of the leading causes for dementia worldwide. Various risk factors including family history, genetics and infections have been implicated in its pathogenesis. The cognitive decline in this condition is mainly a result of the formation of amyloid deposits that provoke neuroinflammation, ultimately resulting in cell death. Recently, an association between peripheral inflammation and Alzheimer's disease was hypothesized. It was suggested that chronic systemic inflammation worsened the inflammatory processes in the brain. This was mainly attributed to increased levels of pro-inflammatory mediators, such as interleukin-1, interleukin -6 and tumor necrosis factor-α in the plasma. As chronic periodontitis is a widespread peripheral immunoinflammatory condition, it has been proposed to play a significant role in the aggravation of Alzheimer's disease. With this background, the current review focuses on the relationship between Alzheimer's disease and chronic periodontitis, and its therapeutic implications.
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Affiliation(s)
- Sumit Gaur
- Department of Pedodontics and Preventive Dentistry, Manipal College of Dental Sciences, Manipal University, Manipal, Karnataka, India
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Cheng DT, Kim DK, Cockayne DA, Belousov A, Bitter H, Cho MH, Duvoix A, Edwards LD, Lomas DA, Miller BE, Reynaert N, Tal-Singer R, Wouters EFM, Agustí A, Fabbri LM, Rames A, Visvanathan S, Rennard SI, Jones P, Parmar H, MacNee W, Wolff G, Silverman EK, Mayer RJ, Pillai SG. Systemic soluble receptor for advanced glycation endproducts is a biomarker of emphysema and associated with AGER genetic variants in patients with chronic obstructive pulmonary disease. Am J Respir Crit Care Med 2013; 188:948-57. [PMID: 23947473 DOI: 10.1164/rccm.201302-0247oc] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
RATIONALE Emphysema in chronic obstructive pulmonary disease (COPD) can be characterized by high-resolution chest computed tomography (HRCT); however, the repeated use of HRCT is limited because of concerns regarding radiation exposure and cost. OBJECTIVES To evaluate biomarkers associated with emphysema and COPD-related clinical characteristics, and to assess the relationships of soluble receptor for advanced glycation endproducts (sRAGE), a candidate systemic biomarker identified in this study, with single-nucleotide polymorphisms (SNPs) in the gene coding for RAGE (AGER locus) and with clinical characteristics. METHODS Circulating levels of 111 biomarkers were analyzed for association with clinical characteristics in 410 patients with COPD enrolled in the TESRA study. sRAGE was also measured in the ECLIPSE cohort in 1,847 patients with COPD, 298 smokers and 204 nonsmokers. The association between 21 SNPs in the AGER locus with sRAGE levels and clinical characteristics was also investigated. MEASUREMENTS AND MAIN RESULTS sRAGE was identified as a biomarker of diffusing capacity of carbon monoxide and lung density in the TESRA cohort. In the ECLIPSE cohort, lower sRAGE levels were associated with increased emphysema, increased Global Initiative for Chronic Obstructive Lung Disease stage, and COPD disease status. The associations with emphysema in both cohorts remained significant after covariate adjustment (P < 0.0001). One SNP in the AGER locus, rs2070600, was associated with circulating sRAGE levels both in TESRA (P = 0.0014) and ECLIPSE (7.07 × 10(-16)), which exceeded genome-wide significance threshold. Another SNP (rs2071288) was also associated with sRAGE levels (P = 0.01) and diffusing capacity of carbon monoxide (P = 0.01) in the TESRA study. CONCLUSIONS Lower circulating sRAGE levels are associated with emphysema severity and genetic polymorphisms in the AGER locus are associated with systemic sRAGE levels. Clinical trial registered with www.clinicaltrials.gov (NCT 00413205 and NCT 00292552).
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Gao J, Teng J, Liu H, Han X, Chen B, Xie A. Association of RAGE gene polymorphisms with sporadic Parkinson's disease in Chinese Han population. Neurosci Lett 2013; 559:158-62. [PMID: 24304868 DOI: 10.1016/j.neulet.2013.11.038] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Revised: 11/12/2013] [Accepted: 11/20/2013] [Indexed: 11/28/2022]
Abstract
Previous studies have corroborated receptor for advanced glycation end-products (RAGE) ablation had a protective effect on nigral dopaminergic neurons in the MPTP model of Parkinson's disease (PD). Genetic variation of RAGE gene may be associated with the development of onset of sporadic PD. The present study aimed to explore the possible association of RAGE gene polymorphisms namely -374T/A,-429T/C, and G82S with PD. A total of 285 PD patients and 285 healthy-matched individuals in Chinese Han population were enrolled. Genotype analyses were performed using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Only the -429T/C polymorphism denoted a significant difference between PD patients and controls (P=0.015) of the three examined single nucleotide polymorphisms (SNPs). Our data also revealed that -429C allele carriers seem to have a decreased risk of PD (OR=0.617, P=0.007). Moreover, there were significant differences in genotype distribution in female PD group and its healthy-matched control subgroup (P=0.014), as well as between late-onset PD (LOPD) and the controls subgroup (P=0.016). However, for -374T/A and 82GS polymorphisms, there was no significant difference in the genotype and allele frequencies between PD patients and the controls, as well as gender- and age-related differences. Our present findings indicate that the RAGE -429T/C polymorphism may be associated with the susceptibility of PD and the CC genotype of -429T/C may be a protective factor for PD in Chinese Han population.
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Affiliation(s)
- Jing Gao
- Department of Neurology, Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Jijun Teng
- Department of Neurology, Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Hongxin Liu
- Department of Neurology, Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Xun Han
- Department of Neurology, Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Biao Chen
- Department of Neurology, Beijing Xuanwu Hospital, Chinese Human Genetic Center, Beijing, China
| | - Anmu Xie
- Department of Neurology, Affiliated Hospital of Medical College, Qingdao University, Qingdao, China.
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Gly82Ser polymorphism of the receptor for advanced glycation end-product (RAGE) potential high risk in patients with colorectal cancer. Tumour Biol 2013; 35:3171-5. [DOI: 10.1007/s13277-013-1414-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2013] [Accepted: 11/11/2013] [Indexed: 11/25/2022] Open
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Abstract
RAGE (receptor for advanced glycation end products) is a multi-ligand receptor that belongs to the immunoglobulin superfamily of transmembrane proteins. RAGE binds AGEs (advanced glycation end products), HMGB1 (high-mobility group box-1; also designated as amphoterin), members of the S100 protein family, glycosaminoglycans and amyloid β peptides. Recent studies using tools of structural biology have started to unravel common molecular patterns in the diverse set of ligands recognized by RAGE. The distal Ig domain (V1 domain) of RAGE has a positively charged patch, the geometry of which fits to anionic surfaces displayed at least in a proportion of RAGE ligands. Association of RAGE to itself, to HSPGs (heparan sulfate proteoglycans), and to Toll-like receptors in the cell membrane plays a key role in cell signaling initiated by RAGE ligation. Ligation of RAGE activates cell signaling pathways that regulate migration of several cell types. Furthermore, RAGE ligation has profound effects on the transcriptional profile of cells. RAGE signaling has been mainly studied as a pathogenetic factor of several diseases, where acute or chronic inflammation plays a role. Recent studies have suggested a physiological role for RAGE in normal lung function and in neuronal signaling.
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Affiliation(s)
- Ari Rouhiainen
- Neuroscience Center, University of Helsinki, Helsinki, Finland.
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30
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González I, Romero J, Rodríguez BL, Pérez-Castro R, Rojas A. The immunobiology of the receptor of advanced glycation end-products: trends and challenges. Immunobiology 2013. [PMID: 23182709 DOI: 10.1016/j.imbio.2012.09.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Pattern-recognition receptors have been highly conserved in evolution. They recognize danger signals including both pathogen- and damage-associated molecular patterns, also known as alarmins. Several signaling pathways leading to an inflammatory reaction as part of an effective defensive response, are thus triggered. RAGE, a receptor initially considered for advanced glycation end-products, is also known to be activated by several danger signals, thus functioning as a pattern-recognition receptor. As a new member of this family, attempts to unraveling its functioning show that RAGE activation not only results in innate immune response but also contributes to promote and shape the acquired immune reaction. As reported for other members of the family, RAGE presents many polymorphic variants and additional studies are needed to elucidate its significance in immune response and disease susceptibility. Here we describe recent advances unraveling RAGE functions, as well as its significance and challenges in immunobiology.
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Affiliation(s)
- Ileana González
- Biomedical Research Laboratories, Medicine Faculty, Catholic University of Maule, 3605 San Miguel Ave., Talca, Chile
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Lu'o'ng KVQ, Nguyen LTH. The role of vitamin D in Alzheimer's disease: possible genetic and cell signaling mechanisms. Am J Alzheimers Dis Other Demen 2013; 28:126-36. [PMID: 23322908 PMCID: PMC10852937 DOI: 10.1177/1533317512473196] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Alzheimer's disease (AD) is the most common form of dementia in the elderly individuals and is associated with progressive memory loss and cognitive dysfunction. A significant association between AD and low levels of vitamin D has been demonstrated. Furthermore, vitamin D supplements appear to have a beneficial clinical effect on AD by regulating micro-RNA, enhancing toll-like receptors, modulating vascular endothelial factor expression, modulating angiogenin, and advanced glycation end products. Vitamin D also exerts its effects on AD by regulating calcium-sensing receptor expression, enhancing amyloid-β peptides clearance, interleukin 10, downregulating matrix metalloproteinases, upregulating heme oxygenase 1, and suppressing the reduced form of nicotinamide adenine dinucleotide phosphate expression. In conclusion, vitamin D may play a beneficial role in AD. Calcitriol is the best vitamin D supplement for AD, because it is the active form of the vitamin D3 metabolite and modulates inflammatory cytokine expression. Therefore, further investigation of the role of calcitriol in AD is needed.
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Affiliation(s)
- Khanh Vinh Quoc Lu'o'ng
- Vietnamese American Medical Research Foundation, 14971 Brookhurst St. Westminster, CA 92683, USA.
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Sukkar MB, Ullah MA, Gan WJ, Wark PAB, Chung KF, Hughes JM, Armour CL, Phipps S. RAGE: a new frontier in chronic airways disease. Br J Pharmacol 2012; 167:1161-76. [PMID: 22506507 PMCID: PMC3504985 DOI: 10.1111/j.1476-5381.2012.01984.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 02/13/2012] [Accepted: 02/22/2012] [Indexed: 12/21/2022] Open
Abstract
Asthma and chronic obstructive pulmonary disease (COPD) are heterogeneous inflammatory disorders of the respiratory tract characterized by airflow obstruction. It is now clear that the environmental factors that drive airway pathology in asthma and COPD, including allergens, viruses, ozone and cigarette smoke, activate innate immune receptors known as pattern-recognition receptors, either directly or indirectly by causing the release of endogenous ligands. Thus, there is now intense research activity focused around understanding the mechanisms by which pattern-recognition receptors sustain the airway inflammatory response, and how these mechanisms might be targeted therapeutically. One pattern-recognition receptor that has recently come to attention in chronic airways disease is the receptor for advanced glycation end products (RAGE). RAGE is a member of the immunoglobulin superfamily of cell surface receptors that recognizes pathogen- and host-derived endogenous ligands to initiate the immune response to tissue injury, infection and inflammation. Although the role of RAGE in lung physiology and pathophysiology is not well understood, recent genome-wide association studies have linked RAGE gene polymorphisms with airflow obstruction. In addition, accumulating data from animal and clinical investigations reveal increased expression of RAGE and its ligands, together with reduced expression of soluble RAGE, an endogenous inhibitor of RAGE signalling, in chronic airways disease. In this review, we discuss recent studies of the ligand-RAGE axis in asthma and COPD, highlight important areas for future research and discuss how this axis might potentially be harnessed for therapeutic benefit in these conditions.
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Affiliation(s)
- Maria B Sukkar
- School of Pharmacy, The University of Technology SydneyNSW, Australia
- Woolcock Institute of Medical Research, Sydney Medical School, The University of SydneyNSW, Australia
| | - Md Ashik Ullah
- Woolcock Institute of Medical Research, Sydney Medical School, The University of SydneyNSW, Australia
- School of Biomedical Sciences and Australian Infectious Diseases Research Centre, The University of QueenslandQld, Australia
| | - Wan Jun Gan
- School of Biomedical Sciences and Australian Infectious Diseases Research Centre, The University of QueenslandQld, Australia
| | - Peter AB Wark
- Centre for Asthma and Respiratory Disease, Hunter Medical Research Institute, University of NewcastleNSW, Australia
- Department of Respiratory and Sleep Medicine, John Hunter HospitalNSW, Australia
| | - Kian Fan Chung
- Airways Disease Section, National Heart and Lung Institute, Imperial College LondonLondon, UK
| | | | - Carol L Armour
- Woolcock Institute of Medical Research, Sydney Medical School, The University of SydneyNSW, Australia
| | - Simon Phipps
- School of Biomedical Sciences and Australian Infectious Diseases Research Centre, The University of QueenslandQld, Australia
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The Complexity of Sporadic Alzheimer's Disease Pathogenesis: The Role of RAGE as Therapeutic Target to Promote Neuroprotection by Inhibiting Neurovascular Dysfunction. Int J Alzheimers Dis 2012; 2012:734956. [PMID: 22482078 PMCID: PMC3310161 DOI: 10.1155/2012/734956] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Accepted: 12/02/2011] [Indexed: 01/08/2023] Open
Abstract
Alzheimer's disease (AD) is the most common cause of dementia. Amyloid plaques and neurofibrillary tangles are prominent pathological features of AD. Aging and age-dependent oxidative stress are the major nongenetic risk factors for AD. The beta-amyloid peptide (Aβ), the major component of plaques, and advanced glycation end products (AGEs) are key activators of plaque-associated cellular dysfunction. Aβ and AGEs bind to the receptor for AGEs (RAGE), which transmits the signal from RAGE via redox-sensitive pathways to nuclear factor kappa-B (NF-κB). RAGE-mediated signaling is an important contributor to neurodegeneration in AD. We will summarize the current knowledge and ongoing studies on RAGE function in AD. We will also present evidence for a novel pathway induced by RAGE in AD, which leads to the expression of thioredoxin interacting protein (TXNIP), providing further evidence that pharmacological inhibition of RAGE will promote neuroprotection by blocking neurovascular dysfunction in AD.
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Suchankova P, Klang J, Cavanna C, Holm G, Nilsson S, Jönsson EG, Ekman A. Is the Gly82Ser polymorphism in the RAGE gene relevant to schizophrenia and the personality trait psychoticism? J Psychiatry Neurosci 2012; 37:122-8. [PMID: 22146151 PMCID: PMC3297072 DOI: 10.1503/jpn.110024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND The receptor for advanced glycation end products (RAGE) is the main receptor for S100B, an astrogial proinflammatory mediator that has been suggested to be involved in the pathophysiology of schizophrenia. To further elucidate the possible relevance of inflammation for mental functions, we investigated a functional polymorphism in the gene coding for RAGE in relation to personality traits and susceptibility to schizophrenia. METHODS We studied the Gly82Ser polymorphism (rs2070600, 244G>A) in 2 population-based cohorts of middle-aged participants assessed using the Karolinska Scales of Personality. In addition, we compared genotype frequencies between patients with schizophrenia and controls. RESULTS The population-based cohorts included 270 women and 247 men, and the case-control study involved 138 patients with schizophrenia and 258 controls. In the population-based cohorts, 82Ser carriers were found to have significantly higher scores for the psychoticism personality trait comprising the detachment and suspicion subscales. The case-control study revealed that the 82Ser allele was significantly more frequent among patients than controls. LIMITATIONS This study was limited by the modest sample size and the use of a self-report measure to assess personality traits. CONCLUSION Our findings suggest that the proven relation between certain personality traits and schizophrenia can at least to some extent be explained on a genetic level. Also, the activated S100B-RAGE axis may be an underlying cause, not only a consequence, of the disease.
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Affiliation(s)
- Petra Suchankova
- Department of Pharmacology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Sweden.
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Cunha C, Giovannini G, Pierini A, Bell AS, Sorci G, Riuzzi F, Donato R, Rodrigues F, Velardi A, Aversa F, Romani L, Carvalho A. Genetically-determined hyperfunction of the S100B/RAGE axis is a risk factor for aspergillosis in stem cell transplant recipients. PLoS One 2011; 6:e27962. [PMID: 22114731 PMCID: PMC3219695 DOI: 10.1371/journal.pone.0027962] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Accepted: 10/28/2011] [Indexed: 12/22/2022] Open
Abstract
Invasive aspergillosis (IA) is a major threat to the successful outcome of hematopoietic stem cell transplantation (HSCT), although individual risk varies considerably. Recent evidence has established a pivotal role for a danger sensing mechanism implicating the S100B/receptor for advanced glycation end products (RAGE) axis in antifungal immunity. The association of selected genetic variants in the S100B/RAGE axis with susceptibility to IA was investigated in 223 consecutive patients undergoing HSCT. Furthermore, studies addressing the functional consequences of these variants were performed. Susceptibility to IA was significantly associated with two distinct polymorphisms in RAGE (-374T/A) and S100B (+427C/T) genes, the relative contribution of each depended on their presence in both transplantation counterparts [patient SNPRAGE, adjusted hazard ratio (HR), 1.97; P = 0.042 and donor SNPRAGE, HR, 2.03; P = 0.047] or in donors (SNPS100B, HR, 3.15; P = 7.8e-4) only, respectively. Functional assays demonstrated a gain-of-function phenotype of both variants, as shown by the enhanced expression of inflammatory cytokines in RAGE polymorphic cells and increased S100B secretion in vitro and in vivo in the presence of the S100B polymorphism. These findings point to a relevant role of the danger sensing signaling in human antifungal immunity and highlight a possible contribution of a genetically-determined hyperfunction of the S100B/RAGE axis to susceptibility to IA in the HSCT setting.
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Affiliation(s)
- Cristina Cunha
- Microbiology Section, Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
| | - Gloria Giovannini
- Microbiology Section, Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
| | - Antonio Pierini
- Division of Hematology and Clinical Immunology, Department of Clinical and Experimental Medicine, University of Perugia, Perugia, Italy
| | - Alain S. Bell
- Division of Hematology and Clinical Immunology, Department of Clinical and Experimental Medicine, University of Perugia, Perugia, Italy
| | - Guglielmo Sorci
- Anatomy Section, Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
| | - Francesca Riuzzi
- Anatomy Section, Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
| | - Rosario Donato
- Anatomy Section, Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
| | - Fernando Rodrigues
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal
- Life and Health Sciences Research Institute/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Andrea Velardi
- Division of Hematology and Clinical Immunology, Department of Clinical and Experimental Medicine, University of Perugia, Perugia, Italy
| | - Franco Aversa
- Division of Hematology and Clinical Immunology, Department of Clinical and Experimental Medicine, University of Perugia, Perugia, Italy
| | - Luigina Romani
- Microbiology Section, Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
| | - Agostinho Carvalho
- Microbiology Section, Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal
- Life and Health Sciences Research Institute/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
- * E-mail:
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Abstract
Microglia - resident myeloid-lineage cells in the brain and the spinal cord parenchyma - function in the maintenance of normal tissue homeostasis. Microglia also act as sentinels of infection and injury, and participate in both innate and adaptive immune responses in the central nervous system. Microglia can become activated and/or dysregulated in the context of neurodegenerative disease and cancer, and thereby contribute to disease severity. Here, we discuss recent studies that provide new insights into the origin and phenotypes of microglia in health and disease.
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