1
|
Ooi H, Furukawa A, Takeuchi M, Koriyama Y. Toxic Advanced Glycation End-Products Inhibit Axonal Elongation Mediated by β-Tubulin Aggregation in Mice Optic Nerves. Int J Mol Sci 2024; 25:7409. [PMID: 39000515 PMCID: PMC11242247 DOI: 10.3390/ijms25137409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 06/23/2024] [Accepted: 07/02/2024] [Indexed: 07/16/2024] Open
Abstract
Advanced glycation end-products (AGEs) form through non-enzymatic glycation of various proteins. Optic nerve degeneration is a frequent complication of diabetes, and retinal AGE accumulation is strongly linked to the development of diabetic retinopathy. Type 2 diabetes mellitus is a major risk factor for Alzheimer's disease (AD), with patients often exhibiting optic axon degeneration in the nerve fiber layer. Notably, a gap exists in our understanding of how AGEs contribute to neuronal degeneration in the optic nerve within the context of both diabetes and AD. Our previous work demonstrated that glyceraldehyde (GA)-derived toxic advanced glycation end-products (TAGE) disrupt neurite outgrowth through TAGE-β-tubulin aggregation and tau phosphorylation in neural cultures. In this study, we further illustrated GA-induced suppression of optic nerve axonal elongation via abnormal β-tubulin aggregation in mouse retinas. Elucidating this optic nerve degeneration mechanism holds promise for bridging the knowledge gap regarding vision loss associated with diabetes mellitus and AD.
Collapse
Affiliation(s)
- Hayahide Ooi
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka 513-8670, Japan; (H.O.); (A.F.)
| | - Ayako Furukawa
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka 513-8670, Japan; (H.O.); (A.F.)
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-Machi, Kahoku 920-0293, Japan;
| | - Yoshiki Koriyama
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka 513-8670, Japan; (H.O.); (A.F.)
| |
Collapse
|
2
|
Noda M, Kikuchi C, Hori E, Iwao T, Nagami C, Takeuchi M, Matsunaga T. Effect of Anagliptin on Vascular Injury in the Femoral Artery of Type 2 Diabetic Rats. Biol Pharm Bull 2024; 47:204-212. [PMID: 38246646 DOI: 10.1248/bpb.b23-00706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Patients with diabetes mellitus (DM) often experience complications such as peripheral arterial disease (PAD), which is thought to be caused by vascular damage resulting from increased oxidative stress. Dipeptidyl peptidase-4 inhibitors have been reported to reduce oxidative stress, although the exact mechanism remains unclear. This study aimed to investigate the impact of long-term (6 weeks) anagliptin treatment at a dose of 200 mg/kg/d against oxidative stress in the femoral artery of Otsuka Long-Evans Tokushima Fatty (OLETF) rats using a well-established animal model for type 2 DM. Serum toxic advanced glycation end-products concentrations and blood glucose levels after glucose loading were significantly elevated in OLETF rats compared to Long-Evans Tokushima Otsuka (LETO) rats but were significantly suppressed by anagliptin administration. Plasma glucagon-like peptide-1 concentrations after glucose loading were significantly increased in anagliptin-treated rats. Superoxide production and reduced nicotinamide adenine dinucleotide phosphate (NADPH) oxidase activity in femoral arteries were significantly increased in OLETF rats compared to LETO rats but were significantly decreased by anagliptin administration. The expressions of NADPH oxidase components (p22phox in the intima region and p22phox and gp91phox in the media region) in the femoral artery were significantly increased in OLETF rats compared to LETO rats but were significantly suppressed by anagliptin administration. Furthermore, the femoral artery showed increased wall thickness in OLETF rats compared to LETO rats, but anagliptin administration reduced the thickening. This study suggests that long-term anagliptin administration can reduce oxidative stress in femoral arteries and improve vascular injury.
Collapse
Affiliation(s)
- Masato Noda
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University
| | - Chigusa Kikuchi
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University
- Laboratory of Community Medicine, Showa Pharmaceutical University
- Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
| | - Eisei Hori
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University
- Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
| | - Takahiro Iwao
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University
- Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
| | - Chie Nagami
- Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University
| | - Tamihide Matsunaga
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University
- Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
| |
Collapse
|
3
|
Mao Z, Baker JR, Takeuchi M, Hyogo H, Tjønneland A, Eriksen AK, Severi G, Rothwell J, Laouali N, Katzke V, Kaaks R, Schulze MB, Palli D, Sieri S, de Magistris MS, Tumino R, Sacerdote C, Derksen JWG, Gram IT, Skeie G, Sandanger TM, Quirós JR, Crous-Bou M, Sánchez MJ, Amiano P, Colorado-Yohar SM, Guevara M, Harlid S, Johansson I, Perez-Cornago A, Freisling H, Gunter M, Weiderpass E, Heath AK, Aglago E, Jenab M, Fedirko V. Prediagnostic serum glyceraldehyde-derived advanced glycation end products and mortality among colorectal cancer patients. Int J Cancer 2023; 152:2257-2268. [PMID: 36715363 DOI: 10.1002/ijc.34449] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 12/05/2022] [Accepted: 12/12/2022] [Indexed: 01/31/2023]
Abstract
Glyceraldehyde-derived advanced glycation end products (glycer-AGEs) could contribute to colorectal cancer development and progression due to their pro-oxidative and pro-inflammatory properties. However, the association of glycer-AGEs with mortality after colorectal cancer diagnosis has not been previously investigated. Circulating glycer-AGEs were measured by competitive ELISA. Multivariable Cox proportional hazards models were used to calculate hazard ratios (HRs) and corresponding 95% confidence intervals (CIs) for associations of circulating glycer-AGEs concentrations with CRC-specific and all-cause mortality among 1034 colorectal cancer (CRC) cases identified within the European Prospective Investigation into Cancer and Nutrition (EPIC) study between 1993 and 2013. During a mean of 48 months of follow-up, 529 participants died (409 from CRC). Glycer-AGEs were statistically significantly positively associated with CRC-specific (HRQ5 vs Q1 = 1.53, 95% CI: 1.04-2.25, Ptrend = .002) and all-cause (HRQ5 vs Q1 = 1.62, 95% CI: 1.16-2.26, Ptrend < .001) mortality among individuals with CRC. There was suggestion of a stronger association between glycer-AGEs and CRC-specific mortality among patients with distal colon cancer (per SD increment: HRproximal colon = 1.02, 95% CI: 0.74-1.42; HRdistal colon = 1.51, 95% CI: 1.20-1.91; Peffect modification = .02). The highest HR was observed among CRC cases in the highest body mass index (BMI) and glycer-AGEs category relative to lowest BMI and glycer-AGEs category for both CRC-specific (HR = 1.78, 95% CI: 1.02-3.01) and all-cause mortality (HR = 2.15, 95% CI: 1.33-3.47), although no statistically significant effect modification was observed. Our study found that prediagnostic circulating glycer-AGEs are positively associated with CRC-specific and all-cause mortality among individuals with CRC. Further investigations in other populations and stratifying by tumor location and BMI are warranted.
Collapse
Affiliation(s)
- Ziling Mao
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jacqueline Roshelli Baker
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Ishikawa, Japan
| | - Hideyuki Hyogo
- Department of Gastroenterology and Metabolism, Hiroshima University Hospital, Hiroshima, Japan
- Lifecare Clinic Hiroshima, Hiroshima, Japan
| | - Anne Tjønneland
- Danish Cancer Society Research Center, Diet, Cancer and Health, Copenhagen, Denmark
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | | | - Gianluca Severi
- UVSQ, Inserm, Centre for Epidemiology and Population Health (U1018), Exposome and Heredity Team, Université Paris-Saclay, Villejuif, France
- Department of Statistics, Computer Science Applications, "G. Parenti" University of Florence, Florence, Italy
| | - Joseph Rothwell
- UVSQ, Inserm, Centre for Epidemiology and Population Health (U1018), Exposome and Heredity Team, Université Paris-Saclay, Villejuif, France
| | - Nasser Laouali
- UVSQ, Inserm, Centre for Epidemiology and Population Health (U1018), Exposome and Heredity Team, Université Paris-Saclay, Villejuif, France
| | - Verena Katzke
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Rudolf Kaaks
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Matthias B Schulze
- Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
- Institute of Nutritional Science, University of Potsdam, Nuthetal, Germany
| | - Domenico Palli
- Cancer Risk Factors and Life-Style Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network - ISPRO, Florence, Italy
| | - Sabina Sieri
- Epidemiology and Prevention Unit, Fondazione IRCCS, Istituto Nazionale dei Tumori di Milano Via Venezian, Milan, Italy
| | | | - Rosario Tumino
- Hyblean Association for Epidemiological Research, AIRE ONLUS, Ragusa, Italy
| | - Carlotta Sacerdote
- Unit of Cancer Epidemiology, Città della Salute e della Scienza University-Hospital, Turin, Italy
| | - Jeroen W G Derksen
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Inger T Gram
- Department of Community Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Guri Skeie
- Department of Community Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Torkjel M Sandanger
- Department of Community Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
| | | | - Marta Crous-Bou
- Unit of Nutrition and Cancer, Cancer Epidemiology Research Program, Catalan Institute of Oncology (ICO) - Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Spain
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Maria-Jose Sánchez
- Escuela Andaluza de Salud Pública (EASP), Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Madrid, Spain
- Department of Preventive Medicine and Public Health, University of Granada, Granada, Spain
| | - Pilar Amiano
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Madrid, Spain
- Ministry of Health of the Basque Government, Sub Directorate for Public Health and Addictions of Gipuzkoa, San Sebastian, Spain
- Epidemiology of Chronic and Communicable Diseases Group, Biodonostia Health Research Institute, San Sebastián, Spain
| | - Sandra M Colorado-Yohar
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Madrid, Spain
- Department of Epidemiology, Murcia Regional Health Council, IMIB-Arrixaca, Murcia, Spain
- Research Group on Demography and Health, National Faculty of Public Health, University of Antioquia, Medellín, Colombia
| | - Marcela Guevara
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Madrid, Spain
- Navarra Public Health Institute, Pamplona, Spain
- Navarra Institute for Health Research (IdiSNA), Pamplona, Spain
| | - Sophia Harlid
- Department of Radiation Sciences, Umeå University, Umeå, Sweden
| | | | - Aurora Perez-Cornago
- Cancer Epidemiology Unit (CEU), Nuffield Department of Population Health, Medical Sciences Division, University of Oxford, Oxford, UK
| | - Heinz Freisling
- Section of Nutrition and Metabolism, Nutritional Epidemiology Group, International Agency for Research on Cancer, World Health Organization (IARC-WHO), Lyon, France
| | - Marc Gunter
- Section of Nutrition and Metabolism, Nutritional Epidemiology Group, International Agency for Research on Cancer, World Health Organization (IARC-WHO), Lyon, France
| | - Elisabete Weiderpass
- Office of the Director, International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - Alicia K Heath
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
| | - Elom Aglago
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
| | - Mazda Jenab
- Section of Nutrition and Metabolism, Nutritional Epidemiology Group, International Agency for Research on Cancer, World Health Organization (IARC-WHO), Lyon, France
| | - Veronika Fedirko
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
- MD Anderson Cancer Center, Houston, Texas, USA
| |
Collapse
|
4
|
Terasaki M, Shibata K, Mori Y, Saito T, Matsui T, Ohara M, Fukui T, Hasumi K, Higashimoto Y, Nobe K, Yamagishi SI. SMTP-44D Inhibits Atherosclerotic Plaque Formation in Apolipoprotein-E Null Mice Partly by Suppressing the AGEs-RAGE Axis. Int J Mol Sci 2023; 24:ijms24076505. [PMID: 37047475 PMCID: PMC10094964 DOI: 10.3390/ijms24076505] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/24/2023] [Accepted: 03/28/2023] [Indexed: 04/03/2023] Open
Abstract
SMTP-44D has been reported to have anti-oxidative and anti-inflammatory reactions, including reduced expression of receptor for advanced glycation end products (RAGE) in experimental diabetic neuropathy. Although activation of RAGE with its ligands, and advanced glycation end products (AGEs), play a crucial role in atherosclerotic cardiovascular disease, a leading cause of death in diabetic patients, it remains unclear whether SMTP-44D could inhibit experimental atherosclerosis by suppressing the AGEs–RAGE axis. In this study, we investigated the effects of SMTP-44D on atherosclerotic plaque formation and expression of AGEs in apolipoprotein-E null (Apoe−/−) mice. We further studied here whether and how SMTP-44D inhibited foam cell formation of macrophages isolated from Apoe−/− mice ex vivo. Although administration of SMTP-44D to Apoe−/− mice did not affect clinical or biochemical parameters, it significantly decreased the surface area of atherosclerotic lesions and reduced the atheromatous plaque size, macrophage infiltration, and AGEs accumulation in the aortic roots. SMTP-44D bound to immobilized RAGE and subsequently attenuated the interaction of AGEs with RAGE in vitro. Furthermore, foam cell formation evaluated by Dil-oxidized low-density lipoprotein (ox-LDL) uptake, and gene expression of RAGE, cyclin-dependent kinase 5 (Cdk5) and CD36 in macrophages isolated from SMTP-44D-treated Apoe−/− mice were significantly decreased compared with those from saline-treated mice. Gene expression levels of RAGE and Cdk5 were highly correlated with each other, the latter of which was also positively associated with that of CD36. The present study suggests that SMTP-44D may inhibit atherosclerotic plaque formation in Apoe−/− mice partly by blocking the AGEs-RAGE-induced ox-LDL uptake into macrophages via the suppression of Cdk5-CD36 pathway.
Collapse
|
5
|
Sakasai-Sakai A, Takeda K, Takeuchi M. Involvement of Intracellular TAGE and the TAGE-RAGE-ROS Axis in the Onset and Progression of NAFLD/NASH. Antioxidants (Basel) 2023; 12:antiox12030748. [PMID: 36978995 PMCID: PMC10045097 DOI: 10.3390/antiox12030748] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
The repeated excessive intake of sugar, a factor that contributes to the onset of nonalcoholic fatty liver disease (NAFLD) and its progression to the chronic form of nonalcoholic steatohepatitis (NASH), markedly increases the hepatocyte content of glyceraldehyde (GA), a glucose/fructose metabolic intermediate. Toxic advanced glycation end-products (toxic AGEs, TAGE) are synthesized by cross-linking reactions between the aldehyde group of GA and the amino group of proteins, and their accumulation has been implicated in the development of NAFLD/NASH and hepatocellular carcinoma (HCC). Our previous findings not only showed that hepatocyte disorders were induced by the intracellular accumulation of TAGE, but they also indicated that extracellular leakage resulted in elevated TAGE concentrations in circulating fluids. Interactions between extracellular TAGE and receptor for AGEs (RAGE) affect intracellular signaling and reactive oxygen species (ROS) production, which may, in turn, contribute to the pathological changes observed in NAFLD/NASH. RAGE plays a role in the effects of the extracellular leakage of TAGE on the surrounding cells, which ultimately promote the onset and progression of NAFLD/NASH. This review describes the relationships between intracellular TAGE levels and hepatocyte and hepatic stellate cell (HSC) damage as well as the TAGE-RAGE-ROS axis in hepatocytes, HSC, and HCC cells. The "TAGE theory" will provide novel insights for future research on NAFLD/NASH.
Collapse
Affiliation(s)
- Akiko Sakasai-Sakai
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Ishikawa 920-0293, Japan
| | - Kenji Takeda
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Ishikawa 920-0293, Japan
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Ishikawa 920-0293, Japan
| |
Collapse
|
6
|
Yasuda Y, Aoki H, Fujita W, Fujibayashi K, Wakasa M, Kawai Y, Nakanishi H, Saito K, Takeuchi M, Kajinami K. Glyceraldehyde-derived advanced glycation end-products are associated with left ventricular ejection fraction and brain natriuretic peptide in patients with diabetic adverse cardiac remodeling. SCAND CARDIOVASC J 2022; 56:208-216. [PMID: 35792728 DOI: 10.1080/14017431.2022.2095013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Objectives: Glyceraldehyde-derived advanced glycation end-products (Glycer-AGEs) have a strong binding affinity for their cognate receptor and elicit oxidative stress and inflammation. However, it remains unknown whether the levels of Glycer-AGEs correlate with the severity of cardiac function and heart failure in patients with diabetic adverse cardiac remodeling (DbCR). Fourteen heart failure patients with type 2 diabetes mellitus (DM) without other cardiac disorders (DbCR group) were enrolled. Another 14 patients with idiopathic dilated cardiomyopathy (DCM) without DM were served as a control (DCM group). All patients were assessed for serum Glycer-AGEs, nitrotyrosine (NT), and tumor necrosis factor alpha (TNFα) and for plasma brain natriuretic peptide (BNP). The left ventricular ejection fraction (LVEF) was evaluated by echocardiography. Results: The mean serum levels of Glycer-AGEs, NT, and TNFα in the DbCR group were significantly higher than those in the DCM group (for Glycer-AGEs, p = .0073; for NT, p = .005; for TNFα, p < .0001, respectively). In the patients with DbCR, the levels of serum Glycer-AGEs and TNFα were closely associated with LVEF and BNP values. Conclusions: Both Glycer-AGEs and TNFα showed close associations with LVEF and the levels of BNP in patients with DbCR. Glycer-AGEs and TNFα may play a pathological role in the development of DbCR.
Collapse
Affiliation(s)
- Yuushi Yasuda
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| | - Hirofumi Aoki
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| | - Wataru Fujita
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| | | | - Minoru Wakasa
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| | - Yasuyuki Kawai
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| | - Hiroaki Nakanishi
- Department of Forensic Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazuyuki Saito
- Department of Forensic Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Ishikawa, Japan
| | - Kouji Kajinami
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| |
Collapse
|
7
|
Atherosclerosis Burdens in Diabetes Mellitus: Assessment by PET Imaging. Int J Mol Sci 2022; 23:ijms231810268. [PMID: 36142181 PMCID: PMC9499611 DOI: 10.3390/ijms231810268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/31/2022] [Accepted: 09/03/2022] [Indexed: 01/14/2023] Open
Abstract
Arteriosclerosis and its sequelae are the most common cause of death in diabetic patients and one of the reasons why diabetes has entered the top 10 causes of death worldwide, fatalities having doubled since 2000. The literature in the field claims almost unanimously that arteriosclerosis is more frequent or develops more rapidly in diabetic than non-diabetic subjects, and that the disease is caused by arterial inflammation, the control of which should therefore be the goal of therapeutic efforts. These views are mostly based on indirect methodologies, including studies of artery wall thickness or stiffness, or on conventional CT-based imaging used to demonstrate tissue changes occurring late in the disease process. In contrast, imaging with positron emission tomography and computed tomography (PET/CT) applying the tracers 18F-fluorodeoxyglucose (FDG) or 18F-sodium fluoride (NaF) mirrors arterial wall inflammation and microcalcification, respectively, early in the course of the disease, potentially enabling in vivo insight into molecular processes. The present review provides an overview of the literature from the more than 20 and 10 years, respectively, that these two tracers have been used for the study of atherosclerosis, with emphasis on what new information they have provided in relation to diabetes and which questions remain insufficiently elucidated.
Collapse
|
8
|
Takeuchi M, Sakasai-Sakai A, Takata T, Takino JI, Koriyama Y. Effects of Toxic AGEs (TAGE) on Human Health. Cells 2022; 11:2178. [PMID: 35883620 PMCID: PMC9317028 DOI: 10.3390/cells11142178] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/06/2022] [Accepted: 07/10/2022] [Indexed: 02/05/2023] Open
Abstract
The habitual and excessive consumption of sugar (i.e., sucrose and high-fructose corn syrup, HFCS) is associated with the onset and progression of lifestyle-related diseases (LSRD). Advanced glycation end-products (AGEs) have recently been the focus of research on the factors contributing to LSRD. Approaches that inhibit the effects of AGEs may be used to prevent and/or treat LSRD; however, since the structures of AGEs vary depending on the type of reducing sugars or carbonyl compounds to which they respond, difficulties are associated with verifying that AGEs are an etiological factor. Cytotoxic AGEs derived from glyceraldehyde, a triose intermediate in the metabolism of glucose and fructose, have been implicated in LSRD and are called toxic AGEs (TAGE). A dietary imbalance (the habitual and excessive intake of sucrose, HFCS, or dietary AGEs) promotes the generation/accumulation of TAGE in vivo. Elevated circulating levels of TAGE have been detected in non-diabetics and diabetics, indicating a strong relationship between the generation/accumulation of TAGE in vivo and the onset and progression of LSRD. We herein outline current findings on "TAGE as a new target" for human health.
Collapse
Affiliation(s)
- Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Kahoku 920-0293, Ishikawa, Japan;
| | - Akiko Sakasai-Sakai
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Kahoku 920-0293, Ishikawa, Japan;
| | - Takanobu Takata
- Department of Life Science, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Kahoku 920-0293, Ishikawa, Japan;
| | - Jun-ichi Takino
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure 737-0112, Hiroshima, Japan;
| | - Yoshiki Koriyama
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka 513-8670, Mie, Japan;
| |
Collapse
|
9
|
Ooi H, Nasu R, Furukawa A, Takeuchi M, Koriyama Y. Pyridoxamine and Aminoguanidine Attenuate the Abnormal Aggregation of β-Tubulin and Suppression of Neurite Outgrowth by Glyceraldehyde-Derived Toxic Advanced Glycation End-Products. Front Pharmacol 2022; 13:921611. [PMID: 35721214 PMCID: PMC9204210 DOI: 10.3389/fphar.2022.921611] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 05/13/2022] [Indexed: 01/03/2023] Open
Abstract
Diabetes mellitus (DM) has been identified as a risk factor for the onset and progression of Alzheimer’s disease (AD). In our previous study, we demonstrated that glyceraldehyde (GA)-derived toxic advanced glycation end-products (toxic AGEs, TAGE) induced similar alterations to those observed in AD. GA induced dysfunctional neurite outgrowth via TAGE-β-tubulin aggregation, which resulted in the TAGE-dependent abnormal aggregation of β-tubulin and tau phosphorylation in human neuroblastoma SH-SY5Y cells. However, the effects of inhibitors of AGE formation on dysfunctional neurite outgrowth caused by GA-induced abnormalities in the aggregation of β-tubulin and tau phosphorylation remain unknown. Aminoguanidine (AG), an AGE inhibitor, and pyridoxamine (PM), a natural form of vitamin B6 (VB6), are effective AGE inhibitors. Therefore, the present study investigated whether AG or PM ameliorate TAGE-β-tubulin aggregation and the suppression of neurite outgrowth by GA. The results obtained showed that AG and PM inhibited the formation of TAGE-β-tubulin, mitigated the GA-induced suppression of neurite outgrowth, and reduced GA-mediated increases in tau phosphorylation levels. Collectively, these results suggest the potential of AG and PM to prevent the DM-associated onset and progression of AD.
Collapse
Affiliation(s)
- Hayahide Ooi
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka, Japan
| | - Ryuto Nasu
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka, Japan
| | - Ayako Furukawa
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka, Japan
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Uchinada-machi, Japan
| | - Yoshiki Koriyama
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka, Japan
- *Correspondence: Yoshiki Koriyama,
| |
Collapse
|
10
|
Ammanath G, Delachi CG, Karabacak S, Ali Y, Boehm BO, Yildiz UH, Alagappan P, Liedberg B. Colorimetric and Fluorometric Profiling of Advanced Glycation End Products. ACS APPLIED MATERIALS & INTERFACES 2022; 14:94-103. [PMID: 34964349 DOI: 10.1021/acsami.1c16261] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Profiling of advanced glycation end products (AGEs) is an emerging area of clinical significance for disease diagnosis and prognosis. Typically, concentrations of AGEs are estimated in laboratories by trained personnel using sophisticated equipment. Herein, a facile approach for colorimetric and fluorometric profiling of AGEs is reported for rapid and on-site analysis. The concentrations of AGE levels in plasma are estimated via changes in optical properties of polythiophenes (PTs) upon interaction with aptamers (Apts) in the presence and in the absence of AGEs. To validate the proposed approach, glyceraldehyde-derived AGEs (AGE class 1 [AGE1]), the biomarker associated with cardiovascular diseases and diabetes, are used as a model system. Colorimetric analysis yielded linear responses for AGE1 for clinically relevant concentration ranges between 1.5 and 300 μg/mL with a limit of detection (LOD) of ∼1.3 μg/mL. Subsequently, an approach utilizing PTs with four different pendant groups in conjunction with four different Apts is demonstrated for qualitative colorimetric profiling and for quantitative fluorometric profiling of up to four AGEs in clinical matrices. Principal component analysis (PCA) of fluorometric responses of AGE-spiked samples yielded distinct responses for the different AGEs tested. Thus, the proposed approach ascertains rapid profiling of spiked AGEs in plasma samples without the requirement of preanalytical processing and advanced instrumentation, thereby facilitating on-site diagnosis.
Collapse
Affiliation(s)
- Gopal Ammanath
- Centre for Biomimetic Sensor Science, Nanyang Technological University, 637553 Singapore, Singapore
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore, Singapore
| | - Carla Giorgia Delachi
- Centre for Biomimetic Sensor Science, Nanyang Technological University, 637553 Singapore, Singapore
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore, Singapore
| | - Soner Karabacak
- Department of Chemistry, Izmir Institute of Technology, Urla, 35430 Izmir, Turkey
| | - Yusuf Ali
- Lee Kong Chian School of Medicine, Nanyang Technological University, 308232 Singapore, Singapore
| | - Bernhard O Boehm
- Lee Kong Chian School of Medicine, Nanyang Technological University, 308232 Singapore, Singapore
| | - Umit Hakan Yildiz
- Department of Chemistry, Izmir Institute of Technology, Urla, 35430 Izmir, Turkey
| | - Palaniappan Alagappan
- Centre for Biomimetic Sensor Science, Nanyang Technological University, 637553 Singapore, Singapore
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore, Singapore
| | - Bo Liedberg
- Centre for Biomimetic Sensor Science, Nanyang Technological University, 637553 Singapore, Singapore
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore, Singapore
| |
Collapse
|
11
|
Tahara N, Tahara A, Maeda-Ogata S, Yoshimura H, Bekki M, Sugiyama Y, Honda A, Igata S, Nishino Y, Matsui T, Fukami A, Enomoto M, Adachi H, Fukumoto Y, Yamagishi SI. Increased Urinary Levels of Pentosidine Measured by a Newly Developed Enzyme-Linked Immunosorbent Assay Are Independently Correlated with Fracture After Fall. Rejuvenation Res 2021; 24:449-455. [PMID: 34846174 DOI: 10.1089/rej.2021.0066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Although we have found that increased serum levels of glyceraldehyde-derived advanced glycation end products (AGEs) are associated with numerous aging-related disorders, it remains unclear which structurally distinct AGEs could be a reliable biomarker of the healthy life-threatening disorders. Since pentosidine is produced by glyceraldehyde, we measured here urinary pentosidine levels with a newly developed enzyme-linked immunosorbent assay (ELISA) kit, which requires no pretreatment with acid hydrolysis and heat, and examined their correlations with geriatric syndrome, such as musculoskeletal disease, frailty, and cognitive impairment, in a general population. Multiple regression analysis revealed that female, age, history of fracture after fall, and taking medication for diabetes were independent correlates of log urine pentosidine-to-creatinine ratio (R2 = 0.190). When gender-adjusted log urine pentosidine-to-creatinine ratio stratified by smile frequency grade was compared using analysis of covariance, urine pentosidine-to-creatinine ratio was significantly decreased according to the increase in smile frequency. Our present findings suggest that measurement of urine pentosidine-to-creatinine ratio by a newly developed ELISA kit may be useful for identifying high-risk patients for fall-related fractures.
Collapse
Affiliation(s)
- Nobuhiro Tahara
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Atsuko Tahara
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Shoko Maeda-Ogata
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Hanae Yoshimura
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Munehisa Bekki
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Yoichi Sugiyama
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Akihiro Honda
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Sachiyo Igata
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Yuri Nishino
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| | - Takanori Matsui
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| | - Ako Fukami
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Mika Enomoto
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Hisashi Adachi
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Yoshihiro Fukumoto
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Sho-Ichi Yamagishi
- Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
| |
Collapse
|
12
|
Takeuchi M, Sakasai-Sakai A, Takata T, Takino JI, Koriyama Y, Kikuchi C, Furukawa A, Nagamine K, Hori T, Matsunaga T. Intracellular Toxic AGEs (TAGE) Triggers Numerous Types of Cell Damage. Biomolecules 2021; 11:biom11030387. [PMID: 33808036 PMCID: PMC8001776 DOI: 10.3390/biom11030387] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/24/2021] [Accepted: 03/01/2021] [Indexed: 12/12/2022] Open
Abstract
The habitual intake of large amounts of sugar, which has been implicated in the onset/progression of lifestyle-related diseases (LSRD), induces the excessive production of glyceraldehyde (GA), an intermediate of sugar metabolism, in neuronal cells, hepatocytes, and cardiomyocytes. Reactions between GA and intracellular proteins produce toxic advanced glycation end-products (toxic AGEs, TAGE), the accumulation of which contributes to various diseases, such as Alzheimer’s disease, non-alcoholic steatohepatitis, and cardiovascular disease. The cellular leakage of TAGE affects the surrounding cells via the receptor for AGEs (RAGE), thereby promoting the onset/progression of LSRD. We demonstrated that the intracellular accumulation of TAGE triggered numerous cellular disorders, and also that TAGE leaked into the extracellular space, thereby increasing extracellular TAGE levels in circulating fluids. Intracellular signaling and the production of reactive oxygen species are affected by extracellular TAGE and RAGE interactions, which, in turn, facilitate the intracellular generation of TAGE, all of which may contribute to the pathological changes observed in LSRD. In this review, we discuss the relationships between intracellular TAGE levels and numerous types of cell damage. The novel concept of the “TAGE theory” is expected to open new perspectives for research into LSRD.
Collapse
Affiliation(s)
- Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Ishikawa 920-0293, Japan; (A.S.-S.); (T.T.)
- Correspondence: ; Tel.: +81-76-218-8456
| | - Akiko Sakasai-Sakai
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Ishikawa 920-0293, Japan; (A.S.-S.); (T.T.)
| | - Takanobu Takata
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Ishikawa 920-0293, Japan; (A.S.-S.); (T.T.)
| | - Jun-ichi Takino
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure, Hiroshima 737-0112, Japan; (J.-i.T.); (T.H.)
| | - Yoshiki Koriyama
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka, Mie 513-8670, Japan; (Y.K.); (A.F.)
| | - Chigusa Kikuchi
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan; (C.K.); (T.M.)
| | - Ayako Furukawa
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka, Mie 513-8670, Japan; (Y.K.); (A.F.)
| | - Kentaro Nagamine
- Department of Clinical Nutrition, Faculty of Health Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure, Hiroshima 737-0112, Japan;
| | - Takamitsu Hori
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure, Hiroshima 737-0112, Japan; (J.-i.T.); (T.H.)
| | - Tamihide Matsunaga
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan; (C.K.); (T.M.)
| |
Collapse
|
13
|
Takeuchi M. Toxic AGEs (TAGE) theory: a new concept for preventing the development of diseases related to lifestyle. Diabetol Metab Syndr 2020; 12:105. [PMID: 33292465 PMCID: PMC7708159 DOI: 10.1186/s13098-020-00614-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Accepted: 11/19/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The habitual excessive intake of sugar (i.e., sucrose and high-fructose corn syrup), which has been implicated in the onset of diabetes mellitus, induces excessive production of glyceraldehyde, a metabolite produced during glucose and fructose metabolism, in hepatocytes, neuronal cells, and cardiomyocytes. MAIN TEXT Toxic advanced glycation end-products (toxic AGEs, TAGE) are formed from reactions between glyceraldehyde and intracellular proteins, and their accumulation contributes to various cellular disorders. TAGE leakage from cells affects the surrounding cells and increases serum TAGE levels, promoting the onset and/or development of lifestyle-related diseases (LSRD). Therefore, serum TAGE levels have potential as a novel biomarker for predicting the onset and/or progression of LSRD, and minimizing the effects of TAGE might help to prevent the onset and/or progression of LSRD. Serum TAGE levels are closely related to LSRD associated with the excessive ingestion of sugar and/or dietary AGEs. CONCLUSIONS The TAGE theory is also expected to open new perspectives for research into numerous other diseases.
Collapse
Affiliation(s)
- Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Uchinada-machi, Ishikawa, 920-0293, Japan.
| |
Collapse
|
14
|
Nasu R, Furukawa A, Suzuki K, Takeuchi M, Koriyama Y. The Effect of Glyceraldehyde-Derived Advanced Glycation End Products on β-Tubulin-Inhibited Neurite Outgrowth in SH-SY5Y Human Neuroblastoma Cells. Nutrients 2020; 12:nu12102958. [PMID: 32992566 PMCID: PMC7601248 DOI: 10.3390/nu12102958] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/14/2020] [Accepted: 09/24/2020] [Indexed: 02/06/2023] Open
Abstract
Nutritional factors can affect the risk of developing neurological disorders and their rate of progression. In particular, abnormalities of carbohydrate metabolism in diabetes mellitus patients lead to an increased risk of neurological disorders such as Alzheimer’s disease (AD). In this study, we investigated the relationship between nervous system disorder and the pathogenesis of AD by exposing SH-SY5Y neuroblastoma cells to glyceraldehyde (GA). We previously reported that GA-derived toxic advanced glycation end products (toxic AGEs, TAGE) induce AD-like alterations including intracellular tau phosphorylation. However, the role of TAGE and their target molecules in the pathogenesis of AD remains unclear. In this study, we investigated the target protein for TAGE by performing two-dimensional immunoblot analysis with anti-TAGE antibody and mass spectrometry and identified β-tubulin as one of the targets. GA treatment induced TAGE-β-tubulin formation and abnormal aggregation of β-tubulin, and inhibited neurite outgrowth in SH-SY5Y cells. On the other hand, glucose-derived AGEs were also involved in developing AD. However, glucose did not make abnormal aggregation of β-tubulin and did not inhibit neurite outgrowth. Understanding the underlying mechanism of TAGE-β-tubulin formation by GA and its role in neurodegeneration may aid in the development of novel therapeutics and neuroprotection strategies.
Collapse
Affiliation(s)
- Ryuto Nasu
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka 513-8670, Japan; (R.N.); (A.F.); (K.S.)
| | - Ayako Furukawa
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka 513-8670, Japan; (R.N.); (A.F.); (K.S.)
| | - Keita Suzuki
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka 513-8670, Japan; (R.N.); (A.F.); (K.S.)
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Uchinada-machi, Ishikawa 920-0293, Japan;
| | - Yoshiki Koriyama
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka 513-8670, Japan; (R.N.); (A.F.); (K.S.)
- Correspondence:
| |
Collapse
|
15
|
Intracellular Toxic Advanced Glycation End-Products Promote the Production of Reactive Oxygen Species in HepG2 Cells. Int J Mol Sci 2020; 21:ijms21144861. [PMID: 32660150 PMCID: PMC7402329 DOI: 10.3390/ijms21144861] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 12/12/2022] Open
Abstract
Hepatocyte cell death is a key process in the pathogenesis of nonalcoholic steatohepatitis (NASH). However, the factors responsible for and mechanisms underlying NASH-related cell death have not yet been elucidated in detail. We herein investigated the effects of intracellular glyceraldehyde (GA)-derived advanced glycation end-products (AGEs), named toxic AGEs (TAGE), on the production of reactive oxygen species (ROS), which have been implicated in the pathogenesis of NASH. Cell death related to intracellular TAGE accumulation was eliminated in the hepatocyte carcinoma cell line HepG2 by the antioxidant effects of N-acetyl-L-cysteine. The intracellular accumulation of TAGE increased ROS production and the expression of Nrf2, including its downstream gene. These results suggest that ROS are produced in association with the accumulation of TAGE and are a direct trigger for cell death. We also investigated the factors responsible for these increases in ROS. Catalase activity did not decrease with the accumulation of TAGE, while mitochondrial membrane depolarization was enhanced in cells treated with GA. These results indicate that TAGE play an important role in mitochondrial abnormalities and increases in ROS production, both of which are characteristic features of NASH. The suppression of TAGE accumulation has potential as a new therapeutic target in the progression of NASH.
Collapse
|
16
|
Terasaki M, Yashima H, Mori Y, Saito T, Matsui T, Hiromura M, Kushima H, Osaka N, Ohara M, Fukui T, Hirano T, Yamagishi SI. A Dipeptidyl Peptidase-4 Inhibitor Inhibits Foam Cell Formation of Macrophages in Type 1 Diabetes via Suppression of CD36 and ACAT-1 Expression. Int J Mol Sci 2020; 21:ijms21134811. [PMID: 32646003 PMCID: PMC7369823 DOI: 10.3390/ijms21134811] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 06/27/2020] [Accepted: 07/06/2020] [Indexed: 01/15/2023] Open
Abstract
Dipeptidyl peptidase-4 (DPP-4) inhibitors have been reported to play a protective role against atherosclerosis in both animal models and patients with type 2 diabetes (T2D). However, since T2D is associated with dyslipidemia, hypertension and insulin resistance, part of which are ameliorated by DPP-4 inhibitors, it remains unclear whether DPP-4 inhibitors could have anti-atherosclerotic properties directly by attenuating the harmful effects of hyperglycemia. Therefore, we examined whether a DPP-4 inhibitor, teneligliptin, could suppress oxidized low-density lipoprotein (ox-LDL) uptake, foam cell formation, CD36 and acyl-coenzyme A: cholesterol acyltransferase-1 (ACAT-1) gene expression of macrophages isolated from streptozotocin-induced type 1 diabetes (T1D) mice and T1D patients as well as advanced glycation end product (AGE)-exposed mouse peritoneal macrophages and THP-1 cells. Foam cell formation, CD36 and ACAT-1 gene expression of macrophages derived from T1D mice or patients increased compared with those from non-diabetic controls, all of which were inhibited by 10 nmol/L teneligliptin. AGEs mimicked the effects of T1D; teneligliptin attenuated all the deleterious effects of AGEs in mouse macrophages and THP-1 cells. Our present findings suggest that teneligliptin may inhibit foam cell formation of macrophages in T1D via suppression of CD36 and ACAT-1 gene expression partly by attenuating the harmful effects of AGEs.
Collapse
Affiliation(s)
- Michishige Terasaki
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Tokyo 142-8666, Japan; (H.Y.); (Y.M.); (T.S.); (M.H.); (H.K.); (N.O.); (M.O.); (T.F.); (S.Y.)
- Correspondence: ; Tel.: +81-3-3784-8947; Fax: +81-3-3784-8948
| | - Hironori Yashima
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Tokyo 142-8666, Japan; (H.Y.); (Y.M.); (T.S.); (M.H.); (H.K.); (N.O.); (M.O.); (T.F.); (S.Y.)
| | - Yusaku Mori
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Tokyo 142-8666, Japan; (H.Y.); (Y.M.); (T.S.); (M.H.); (H.K.); (N.O.); (M.O.); (T.F.); (S.Y.)
| | - Tomomi Saito
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Tokyo 142-8666, Japan; (H.Y.); (Y.M.); (T.S.); (M.H.); (H.K.); (N.O.); (M.O.); (T.F.); (S.Y.)
| | - Takanori Matsui
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume 830-0011, Japan;
| | - Munenori Hiromura
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Tokyo 142-8666, Japan; (H.Y.); (Y.M.); (T.S.); (M.H.); (H.K.); (N.O.); (M.O.); (T.F.); (S.Y.)
| | - Hideki Kushima
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Tokyo 142-8666, Japan; (H.Y.); (Y.M.); (T.S.); (M.H.); (H.K.); (N.O.); (M.O.); (T.F.); (S.Y.)
| | - Naoya Osaka
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Tokyo 142-8666, Japan; (H.Y.); (Y.M.); (T.S.); (M.H.); (H.K.); (N.O.); (M.O.); (T.F.); (S.Y.)
| | - Makoto Ohara
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Tokyo 142-8666, Japan; (H.Y.); (Y.M.); (T.S.); (M.H.); (H.K.); (N.O.); (M.O.); (T.F.); (S.Y.)
| | - Tomoyasu Fukui
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Tokyo 142-8666, Japan; (H.Y.); (Y.M.); (T.S.); (M.H.); (H.K.); (N.O.); (M.O.); (T.F.); (S.Y.)
| | - Tsutomu Hirano
- Diabetes Center, Ebina General Hospital, Ebina 243-0433, Japan;
| | - Sho-ichi Yamagishi
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Tokyo 142-8666, Japan; (H.Y.); (Y.M.); (T.S.); (M.H.); (H.K.); (N.O.); (M.O.); (T.F.); (S.Y.)
| |
Collapse
|
17
|
Saku K, Tahara N, Takaseya T, Otsuka H, Takagi K, Shojima T, Shintani Y, Zaima Y, Kikusaki S, Fukuda T, Oryoji A, Nishino Y, Matsui T, Kakuma T, Akiba J, Fukumoto Y, Yamagishi SI, Tanaka H. Pathological Role of Receptor for Advanced Glycation End Products in Calcified Aortic Valve Stenosis. J Am Heart Assoc 2020; 9:e015261. [PMID: 32552251 PMCID: PMC7670521 DOI: 10.1161/jaha.119.015261] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Background Aortic stenosis (AS) is highly prevalent in patients with atherosclerotic cardiovascular disease. Advanced glycation end products (AGEs) and the receptor for AGEs (RAGE) play a pivotal role for vascular calcification in atherosclerosis. We hypothesize that the AGEs-RAGE axis could also be involved in the pathophysiological mechanism of calcified AS. Methods and Results A total of 54 patients with calcified AS who underwent aortic valve replacement were prospectively enrolled from 2014 to 2016 (mean age 75.3±7.7 years). Aortic valve specimens were obtained from 47 patients and 16 deceased control subjects without aortic valve disease (mean age 63.2±14.5 years). The valvular expression of RAGE was evaluated by immunohistochemistry. Serum levels of AGEs and soluble RAGE were measured in 50 patients with calcified AS and 70 age-matched and sex-matched control subjects without heart disease. The valvular RAGE expression in patients with calcified AS was higher than controls (P=0.004) and was significantly associated with a decreased ankle-brachial pressure index (P=0.007) and an increased intima-media thickness (P=0.026). RAGE and α-smooth muscle actin were coexpressed and were partially costained with osteocalcin and alkaline phosphatase. The serum levels of AGEs and soluble RAGE were significantly higher in the patients with calcified AS than in the controls (P=0.013 and P<0.001, respectively). Soluble RAGE (inversely) and use of aspirin were independently correlated with changes in left ventricular systolic function after aortic valve replacement (P=0.012 and P=0.002, respectively). Conclusions Our present study suggests that RAGE may play a role in the pathogenesis of calcified AS, which is a prognostic marker in patients with AS after aortic valve replacement.
Collapse
Affiliation(s)
- Kosuke Saku
- Department of Surgery Kurume University School of Medicine Kurume Japan
| | - Nobuhiro Tahara
- Division of Cardiovascular Medicine Department of Medicine Kurume University School of Medicine Kurume Japan
| | - Tohru Takaseya
- Department of Surgery Kurume University School of Medicine Kurume Japan
| | - Hiroyuki Otsuka
- Department of Surgery Kurume University School of Medicine Kurume Japan
| | - Kazuyoshi Takagi
- Department of Surgery Kurume University School of Medicine Kurume Japan
| | - Takahiro Shojima
- Department of Surgery Kurume University School of Medicine Kurume Japan
| | - Yusuke Shintani
- Department of Surgery Kurume University School of Medicine Kurume Japan
| | - Yasuyuki Zaima
- Department of Surgery Kurume University School of Medicine Kurume Japan
| | - Satoshi Kikusaki
- Department of Surgery Kurume University School of Medicine Kurume Japan
| | - Tomofumi Fukuda
- Department of Surgery Kurume University School of Medicine Kurume Japan
| | - Atsunobu Oryoji
- Department of Surgery Kurume University School of Medicine Kurume Japan
| | - Yuri Nishino
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications Kurume University School of Medicine Kurume Japan
| | - Takanori Matsui
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications Kurume University School of Medicine Kurume Japan
| | | | - Jun Akiba
- Department of Diagnostic Pathology Kurume University Hospital Kurume Japan
| | - Yoshihiro Fukumoto
- Division of Cardiovascular Medicine Department of Medicine Kurume University School of Medicine Kurume Japan
| | - Sho-Ichi Yamagishi
- Division of Diabetes, Metabolism, and Endocrinology Department of Medicine Showa University School of Medicine Tokyo Japan
| | - Hiroyuki Tanaka
- Department of Surgery Kurume University School of Medicine Kurume Japan
| |
Collapse
|
18
|
Bekki M, Tahara N, Tahara A, Igata S, Honda A, Sugiyama Y, Nakamura T, Sun J, Kumashiro Y, Matsui T, Fukumoto Y, Yamagishi SI. Switching Dipeptidyl Peptidase-4 Inhibitors to Tofogliflozin, a Selective Inhibitor of Sodium-Glucose Cotransporter 2 Improve Arterial Stiffness Evaluated by Cardio-Ankle Vascular Index in Patients with Type 2 Diabetes: A Pilot Study. Curr Vasc Pharmacol 2020; 17:411-420. [PMID: 29766812 DOI: 10.2174/1570161116666180515154555] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/19/2018] [Accepted: 06/19/2018] [Indexed: 01/01/2023]
Abstract
BACKGROUND We have found that anagliptin, a dipeptidyl peptidase-4 inhibitor (DPP-4) significantly ameliorates arterial stiffness in Type 2 Diabetes Mellitus (T2DM) patients compared with an equivalent hypoglycaemic agent, glimepiride. However, it remains unclear whether switching DPP-4 inhibitors to tofogliflozin, a selective inhibitor of Sodium-Glucose Cotransporter 2 (SGLT2) improves arterial stiffness in T2DM patients. METHODS Nineteen T2DM patients who had received DPP-4 inhibitors for at least 1 year were enrolled in this study. Clinical parameters and arterial stiffness evaluated by cardio-ankle vascular index (CAVI) were measured at baseline and after 6-months treatment with tofogliflozin. RESULTS At 6 months after switching to tofogliflozin, CAVI, waist circumference, body weight, body mass index, subcutaneous and visceral fat volume, white blood cell number, fasting plasma insulin, uric acid, aspartate transaminase (AST), γ-glutamyl transferase (GTP), and advanced glycation end products (AGEs) were significantly reduced, while red blood cell number, haemoglobin, and HbA1c values were increased. When stratified by median values of change in CAVI after switching to tofogliflozin (ΔCAVI), baseline serum levels of AGEs were significantly higher in the low ΔCAVI group (high responder) than in the high one (low responder). ΔAST and ΔGTP were positively correlated with ΔCAVI. CONCLUSION The present study suggests that switching DPP-4 inhibitors to tofogliflozin ameliorates arterial stiffness in T2DM patients partly via improvement of liver function. Baseline serum levels of AGEs may identify patients who improve arterial stiffness more after treatment with tofogliflozin.
Collapse
Affiliation(s)
- Munehisa Bekki
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, 67 Asahi-machi, Japan
| | - Nobuhiro Tahara
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, 67 Asahi-machi, Japan
| | - Atsuko Tahara
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, 67 Asahi-machi, Japan
| | - Sachiyo Igata
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, 67 Asahi-machi, Japan
| | - Akihiro Honda
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, 67 Asahi-machi, Japan
| | - Yoichi Sugiyama
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, 67 Asahi-machi, Japan
| | - Tomohisa Nakamura
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, 67 Asahi-machi, Japan
| | - Jiahui Sun
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, 67 Asahi-machi, Japan
| | | | - Takanori Matsui
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| | - Yoshihiro Fukumoto
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, 67 Asahi-machi, Japan
| | - Sho-Ichi Yamagishi
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| |
Collapse
|
19
|
Association of physical fitness with skin autofluorescence-derived advanced glycation end products in children. Pediatr Res 2020; 87:1106-1111. [PMID: 31791044 DOI: 10.1038/s41390-019-0694-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 11/02/2019] [Accepted: 11/07/2019] [Indexed: 12/24/2022]
Abstract
BACKGROUND Advanced glycation end products (AGEs) accumulate with age and development of cardiovascular disease. Higher AGEs have been shown in children with diabetes but little is known about their association with lifestyle conditions in childhood. We hypothesized that BMI, blood pressure and cardiorespiratory fitness (CRF) are associated with subcutaneous AGEs formation in children. METHODS In this cross-sectional study, 1075 children (aged 7.2 ± 0.4 years) were screened for subcutaneous AGEs (skin autofluorescence; SAF), body mass index (BMI), blood pressure (BP), and CRF using standardized procedures. Group comparisons were performed in clinical BP and BMI categories and tertiles of CRF. RESULTS Children with higher physical fitness showed lower SAF (0.99(1.03;1.10)au) compared to children with low CRF (1.09(1.03;1.05)au, p < 0.001). An increase of one shuttle run stage was associated with a mean reduction in SAF of -0.033(CI: -0.042;-0.024)au, independent of BMI and BP (p < 0.001). BMI and BP were not independently associated with SAF-derived AGEs in this large cohort of primary school children. CONCLUSIONS Low physical fitness but not BMI and BP were associated with higher levels of AGEs. Primary prevention programs in young children may need to focus on improving physical fitness in game settings in order to reduce the growing prevalence of metabolic disorders during childhood.
Collapse
|
20
|
Sotokawauchi A, Nakamura N, Matsui T, Higashimoto Y, Yamagishi SI. Glyceraldehyde-Derived Pyridinium Evokes Renal Tubular Cell Damage via RAGE Interaction. Int J Mol Sci 2020; 21:ijms21072604. [PMID: 32283652 PMCID: PMC7177832 DOI: 10.3390/ijms21072604] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/06/2020] [Accepted: 04/08/2020] [Indexed: 02/08/2023] Open
Abstract
Glyceraldehyde-derived advanced glycation end products (glycer-AGEs) contribute to proximal tubulopathy in diabetes. However, what glycer-AGE structure could evoke tubular cell damage remains unknown. We first examined if deleterious effects of glycer-AGEs on reactive oxygen species (ROS) generation in proximal tubular cells were blocked by DNA-aptamer that could bind to glyceraldehyde-derived pyridinium (GLAP) (GLAP-aptamer), and then investigated whether and how GLAP caused proximal tubular cell injury. GLAP-aptamer and AGE-aptamer raised against glycer-AGEs were prepared using a systemic evolution of ligands by exponential enrichment. The binding affinity of GLAP-aptamer to glycer-AGEs was measured with a bio-layer interferometry. ROS generation was evaluated using fluorescent probes. Gene expression was analyzed by reverse transcription-polymerase chain reaction (RT-PCR). GLAP-aptamer bound to glycer-AGEs with a dissociation constant of 7.7 × 10−5 M. GLAP-aptamer, glycer-AGE-aptamer, or antibodies directed against receptor for glycer-AGEs (RAGE) completely prevented glycer-AGE- or GLAP-induced increase in ROS generation, MCP-1, PAI-1, or RAGE gene expression in tubular cells. Our present results suggest that GLAP is one of the structurally distinct glycer-AGEs, which may mediate oxidative stress and inflammatory reactions in glycer-AGE-exposed tubular cells. Blockade of the interaction of GLAP-RAGE by GLAP-aptamer may be a therapeutic target for proximal tubulopathy in diabetic nephropathy.
Collapse
Affiliation(s)
- Ami Sotokawauchi
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume 830-0011, Japan; (A.S.); (N.N.); (T.M.)
| | - Nobutaka Nakamura
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume 830-0011, Japan; (A.S.); (N.N.); (T.M.)
| | - Takanori Matsui
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume 830-0011, Japan; (A.S.); (N.N.); (T.M.)
| | - Yuichiro Higashimoto
- Department of Chemistry, Kurume University School of Medicine, Kurume 830-0011, Japan;
| | - Sho-ichi Yamagishi
- Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Showa University School of Medicine, Tokyo 142-8666, Japan
- Correspondence: ; Tel.: +81-3-3784-8693; Fax: +81-3-3784-8948
| |
Collapse
|
21
|
Advanced Glycation End Products (AGEs): Biochemistry, Signaling, Analytical Methods, and Epigenetic Effects. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:3818196. [PMID: 32256950 PMCID: PMC7104326 DOI: 10.1155/2020/3818196] [Citation(s) in RCA: 200] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 01/13/2020] [Accepted: 01/24/2020] [Indexed: 02/08/2023]
Abstract
The advanced glycation end products (AGEs) are organic molecules formed in any living organisms with a great variety of structural and functional properties. They are considered organic markers of the glycation process. Due to their great heterogeneity, there is no specific test for their operational measurement. In this review, we have updated the most common chromatographic, colorimetric, spectroscopic, mass spectrometric, and serological methods, typically used for the determination of AGEs in biological samples. We have described their signaling and signal transduction mechanisms and cell epigenetic effects. Although mass spectrometric analysis is not widespread in the detection of AGEs at the clinical level, this technique is highly promising for the early diagnosis and therapeutics of diseases caused by AGEs. Protocols are available for high-resolution mass spectrometry of glycated proteins although they are characterized by complex machine management. Simpler procedures are available although much less precise than mass spectrometry. Among them, immunochemical tests are very common since they are able to detect AGEs in a simple and immediate way. In these years, new methodologies have been developed using an in vivo novel and noninvasive spectroscopic methods. These methods are based on the measurement of autofluorescence of AGEs. Another method consists of detecting AGEs in the human skin to detect chronic exposure, without the inconvenience of invasive methods. The aim of this review is to compare the different approaches of measuring AGEs at a clinical perspective due to their strict association with oxidative stress and inflammation.
Collapse
|
22
|
GIP as a Potential Therapeutic Target for Atherosclerotic Cardiovascular Disease-A Systematic Review. Int J Mol Sci 2020; 21:ijms21041509. [PMID: 32098413 PMCID: PMC7073149 DOI: 10.3390/ijms21041509] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 02/20/2020] [Accepted: 02/21/2020] [Indexed: 02/06/2023] Open
Abstract
Glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) are gut hormones that are secreted from enteroendocrine L cells and K cells in response to digested nutrients, respectively. They are also referred to incretin for their ability to stimulate insulin secretion from pancreatic beta cells in a glucose-dependent manner. Furthermore, GLP-1 exerts anorexic effects via its actions in the central nervous system. Since native incretin is rapidly inactivated by dipeptidyl peptidase-4 (DPP-4), DPP-resistant GLP-1 receptor agonists (GLP-1RAs), and DPP-4 inhibitors are currently used for the treatment of type 2 diabetes as incretin-based therapy. These new-class agents have superiority to classical oral hypoglycemic agents such as sulfonylureas because of their low risks for hypoglycemia and body weight gain. In addition, a number of preclinical studies have shown the cardioprotective properties of incretin-based therapy, whose findings are further supported by several randomized clinical trials. Indeed, GLP-1RA has been significantly shown to reduce the risk of cardiovascular and renal events in patients with type 2 diabetes. However, the role of GIP in cardiovascular disease remains to be elucidated. Recently, pharmacological doses of GIP receptor agonists (GIPRAs) have been found to exert anti-obesity effects in animal models. These observations suggest that combination therapy of GLP-1R and GIPR may induce superior metabolic and anti-diabetic effects compared with each agonist individually. Clinical trials with GLP-1R/GIPR dual agonists are ongoing in diabetic patients. Therefore, in this review, we summarize the cardiovascular effects of GIP and GIPRAs in cell culture systems, animal models, and humans.
Collapse
|
23
|
Tanaka K, Yamagata K, Kubo S, Nakayamada S, Sakata K, Matsui T, Yamagishi SI, Okada Y, Tanaka Y. Glycolaldehyde-modified advanced glycation end-products inhibit differentiation of human monocytes into osteoclasts via upregulation of IL-10. Bone 2019; 128:115034. [PMID: 31421252 DOI: 10.1016/j.bone.2019.115034] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 07/17/2019] [Accepted: 08/06/2019] [Indexed: 12/22/2022]
Abstract
Diabetes patients are at high risk of bone fracture due to accumulation of advanced glycation end products (AGEs) and low bone turnover. Although AGEs inhibit osteoblast functions, little is known about their roles in regulation of human osteoclast differentiation. The aim of this study was to determine the roles of AGEs in regulation of human osteoclast differentiation. Human CD14+ monocytes collected from healthy individuals were stimulated in vitro with conventional cytokines to induce osteoclast differentiation. Simultaneously, glucose-modified AGEs-BSA (Glu-AGEs-BSA) and glycolaldehyde-modified AGEs-BSA (Glyco-AGEs-BSA) were added to analyze their role in regulation of osteoclast differentiation. Human CD14+ cells expressed endogenous receptor for AGE (RAGE). Stimulation with Glyco-AGEs-BSA, but not Glu-AGEs-BSA, reduced the number of tartrate-resistant acid phosphatase-positive cells in a dose-dependent manner and suppressed mRNA expression of nuclear factor of activated T-cells 1 and cathepsin K. Glyco-AGEs-BSA up-regulated pro-inflammatory cytokines and anti-inflammatory cytokine IL-10. The addition of IL-10-neutralizing antibodies abrogated the suppressive effect of Glyco-AGEs-BSA on osteoclast differentiation. Stimulation of Glyco-AGE-BSA resulted in nuclear factor (NF)-κB phosphorylation, and addition of an inhibitor of κB kinase suppressed IL-10 production. We conclude that Glyco-AGEs-BSA inhibited human osteoclast differentiation through induction of IL-10 expression via NF-κB. It can be assumed that AGE bioaccumulation in diabetic patients increases the risk of bone fracture, through inhibition of osteoclast differentiation, reduction of bone turnover, and disruption of bone remodeling.
Collapse
Affiliation(s)
- Kenichi Tanaka
- The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu 807-8555, Japan
| | - Kaoru Yamagata
- The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu 807-8555, Japan
| | - Satoshi Kubo
- The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu 807-8555, Japan
| | - Shingo Nakayamada
- The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu 807-8555, Japan
| | - Kei Sakata
- The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu 807-8555, Japan; Mitsubishi Tanabe Pharma Corporation, Yokohama 227-0033, Japan
| | - Takanori Matsui
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Fukuoka 830-0011, Japan
| | - Sho-Ichi Yamagishi
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Fukuoka 830-0011, Japan
| | - Yosuke Okada
- The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu 807-8555, Japan
| | - Yoshiya Tanaka
- The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu 807-8555, Japan.
| |
Collapse
|
24
|
Yamagishi SI. Role of Advanced Glycation Endproduct (AGE)-Receptor for Advanced Glycation Endproduct (RAGE) Axis in Cardiovascular Disease and Its Therapeutic Intervention. Circ J 2019; 83:1822-1828. [PMID: 31366777 DOI: 10.1253/circj.cj-19-0618] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Despite the early loss of glycemic differences between the original intensive therapy group and conventional treatment in the DCCT/EDIC and UKPDS 80 trials, a continued reduction in microvascular risk and risk reductions for emergency myocardial infarction and all-cause death were observed 10-30 years after the end of these trials. These observations demonstrated that so-called "metabolic memory" could cause chronic abnormalities in diabetic vessels that are not easily reversed, even by subsequent improvement in blood glucose levels, thus suggesting a long-term beneficial influence of early metabolic control; that is, legacy effects on the risk of vascular complications and death in patients with both type 1 and type 2 diabetes. Formation and accumulation of advanced glycation endproducts (AGEs) are known to progress at an accelerated rate under diabetes. Furthermore, AGEs are hardly degraded and remain for a long time in diabetic vessels even after glycemic control is improved. Therefore, AGEs could explain why former cumulative diabetic exposure could contribute to current progression of vascular complications in diabetes. Here, the clinical utility of measurement of serum and tissue accumulation levels of AGEs for evaluating the prevalence and severity of numerous types of cardiovascular disease is reviewed and novel therapeutic strategies that could target the AGE-RAGE axis in CVD are discussed.
Collapse
Affiliation(s)
- Sho-Ichi Yamagishi
- Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Showa University School of Medicine
| |
Collapse
|
25
|
Raggi P. Screening for Atherosclerotic Cardiovascular Disease in Patients With Type 2 Diabetes Mellitus: Controversies and Guidelines. Can J Diabetes 2019; 44:86-92. [PMID: 31594760 DOI: 10.1016/j.jcjd.2019.08.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 08/16/2019] [Accepted: 08/19/2019] [Indexed: 11/17/2022]
Abstract
If a disease state is highly prevalent and its consequences are severe, it may be appropriate to seek methods to identify it early to forestall its development and complications. Diabetes mellitus is a proven risk factor for the development of atherosclerosis, although its face and outcome are changing, as shown in contemporary clinical trials. In fact, decompensated heart failure seems to drive the hospitalization rate in patients with diabetes, and mortality from heart failure is reduced with modern hypoglycemic treatments. Nonetheless, atherosclerotic complications continue to be a major health concern in this segment of the population and cardiovascular imaging has been employed in an attempt to achieve a more accurate risk stratification. Although imaging for detection of obstructive coronary artery disease failed to reach such a goal, imaging for preclinical atherosclerosis may be more successful. In this review, we discuss the use of computed tomography and positron emission tomography to detect preclinical coronary atherosclerosis in asymptomatic patients with diabetes. Despite recent advances in the field, several questions remain to be answered as to the ultimate benefit of imaging for prevention in diabetes mellitus.
Collapse
Affiliation(s)
- Paolo Raggi
- Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada; Department of Medicine, University of Alberta, Edmonton, Alberta, Canada.
| |
Collapse
|
26
|
Tahara N, Kojima R, Yoshida R, Bekki M, Sugiyama Y, Tahara A, Maeda S, Honda A, Igata S, Nakamura T, Sun J, Matsui T, Fukumoto Y, Matsui T, Yamagishi SI. Serum Levels of Protein-Bound Methylglyoxal-Derived Hydroimidazolone-1 are Independently Correlated with Asymmetric Dimethylarginine. Rejuvenation Res 2019; 22:431-438. [PMID: 30661488 DOI: 10.1089/rej.2018.2152] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Asymmetric dimethylarginine (ADMA) is an endogenous inhibitor of nitric oxide synthase, being involved in endothelial dysfunction. Furthermore, ADMA levels have been shown to predict future cardiovascular events in patients with coronary risk factors, such as diabetes and hypertension. We have previously found that glyceraldehyde-derived advanced glycation end products (glycer-AGEs) stimulate ADMA generation in vitro and the levels are associated with ADMA, endothelial dysfunction, and vascular inflammation in humans. However, it remains unclear what structurally distinct glycer-AGEs are independent correlates of ADMA. In this study, we addressed the issue. We measured serum levels of protein-bound and free methylglyoxal-derived hydroimidazolone-1 (MG-H1) and argpyrimidine, two major structurally identified glycer-AGEs by liquid chromatography-tandem mass spectrometry in 128 outpatients, and examined the correlations of these AGEs, vascular stiffness, and inflammation with ADMA. Moreover, we examined whether the changes in serum MG-H1 and argpyrimidine levels after 4-month treatment with oral hypoglycemic agents (OHAs) were associated with those of ADMA in other 44 patients with impaired glucose tolerance or type 2 diabetes. Multiple stepwise regression analysis revealed that protein-bound MG-H1, high-density lipoprotein cholesterol (inversely), high-sensitivity C-reactive protein, and cardio-ankle vascular index were independently correlated with ADMA (R2 = 0.259). Treatment with OHAs significantly decreased ADMA levels in 44 glucose-intolerant or type 2 diabetic patients, and the changes in protein-bound MG-H1 levels were positively associated with those in ADMA values (p < 0.05). This study demonstrates that serum levels of protein-bound MG-H1 are independently correlated with ADMA and may be a therapeutic target for cardiovascular disease.
Collapse
Affiliation(s)
- Nobuhiro Tahara
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Ruchia Kojima
- Division of Bioscience and Bioenvironmental Sciences, Faculty of Agriculture, Graduate School of Kyushu University, Fukuoka, Japan
| | - Risa Yoshida
- Division of Bioscience and Bioenvironmental Sciences, Faculty of Agriculture, Graduate School of Kyushu University, Fukuoka, Japan
| | - Munehisa Bekki
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Yoichi Sugiyama
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Atsuko Tahara
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Shoko Maeda
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Akihiro Honda
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Sachiyo Igata
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Tomohisa Nakamura
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Jiahui Sun
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Takanori Matsui
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| | - Yoshihiro Fukumoto
- Division of Cardiovascular Medicine, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Toshiro Matsui
- Division of Bioscience and Bioenvironmental Sciences, Faculty of Agriculture, Graduate School of Kyushu University, Fukuoka, Japan
| | - Sho-Ichi Yamagishi
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| |
Collapse
|
27
|
The Relevance of Toxic AGEs (TAGE) Cytotoxicity to NASH Pathogenesis: A Mini-Review. Nutrients 2019; 11:nu11020462. [PMID: 30813302 PMCID: PMC6412438 DOI: 10.3390/nu11020462] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 02/18/2019] [Accepted: 02/18/2019] [Indexed: 02/07/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is currently the most common feature of chronic liver disease. Non-alcoholic steatohepatitis (NASH) is a severe form of NAFLD, and one of its risk factors is hyperglycemia. The chronic ingestion of excessive amounts of high-fructose corn syrup is associated with an increased prevalence of fatty liver. Under hyperglycemic conditions, advanced glycation end-products (AGEs) are generated through a non-enzymatic glycation reaction between the ketone or aldehyde groups of sugars and amino groups of proteins. Glyceraldehyde (GA) is a metabolic intermediate of sugars, and GA-derived AGEs (known as toxic AGEs (TAGE)) have been implicated in the development of NASH. TAGE accumulates more in serum or liver tissue in NASH patients than in healthy controls or patients with simple steatosis. Furthermore, the TAGE precursor, GA, causes cell damage through protein dysfunctions by TAGE modifications and induces necrotic-type hepatocyte death. Intracellular TAGE may leak outside of necrotic-type cells. Extracellular TAGE then induce inflammatory or fibrotic responses related to the pathology of NASH in surrounding cells, including hepatocytes and hepatic stellate cells. This review focuses on the contribution of TAGE to the pathology of NASH, particularly hepatic cell death related to NASH.
Collapse
|
28
|
Takata T, Sakasai-Sakai A, Ueda T, Takeuchi M. Intracellular toxic advanced glycation end-products in cardiomyocytes may cause cardiovascular disease. Sci Rep 2019; 9:2121. [PMID: 30765817 PMCID: PMC6375929 DOI: 10.1038/s41598-019-39202-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 01/16/2019] [Indexed: 12/20/2022] Open
Abstract
Cardiovascular disease (CVD) is a lifestyle-related disease (LSRD) and one of the largest public health issues. Risk factors for CVD correlate with an excessive intake of glucose and/or fructose, which has been shown to induce the production of advanced glycation end-products (AGEs). We previously identified AGEs derived from glyceraldehyde and named them toxic AGEs (TAGE) due to their cytotoxicities and relationship with LSRD. We also reported that extracellular TAGE in the vascular system may promote CVD and that serum TAGE levels are associated with risk factors for CVD. The mechanisms responsible for the onset and/or progression of CVD by extracellular TAGE or the above risk factors involve vascular disorders. In the present study, we revealed that rat primary cultured cardiomyocytes generated intracellular TAGE, which decreased beating rates and induced cell death. LC3-II/LC3-I, a factor of autophagy, also decreased. Although intracellular TAGE may be targets of degradation as cytotoxic proteins via autophagy, they may inhibit autophagy. Furthermore, the mechanisms by which intracellular TAGE decrease beating rates and induce cell death may involve the suppression of autophagy. The present results suggest that intracellular TAGE are generated in cardiomyocytes and directly damage them, resulting in CVD.
Collapse
Affiliation(s)
- Takanobu Takata
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Uchinada-machi, Ishikawa, 920-0293, Japan.
| | - Akiko Sakasai-Sakai
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Uchinada-machi, Ishikawa, 920-0293, Japan
| | - Tadashi Ueda
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Uchinada-machi, Ishikawa, 920-0293, Japan
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Uchinada-machi, Ishikawa, 920-0293, Japan
| |
Collapse
|
29
|
Yamagishi SI, Matsui T. Role of Hyperglycemia-Induced Advanced Glycation End Product (AGE) Accumulation in Atherosclerosis. Ann Vasc Dis 2018; 11:253-258. [PMID: 30402172 PMCID: PMC6200622 DOI: 10.3400/avd.ra.18-00070] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
There is a growing body of evidence that cumulative hyperglycemic exposure plays a central role in the development and progression of atherosclerotic cardiovascular disease in diabetic patients. Monosaccharides, such as glucose, fructose, and glyceraldehyde can react non-enzymatically with amino groups of proteins, lipids, nucleic acids to form senescent macromolecules termed advanced glycation end products (AGEs), whose formation and accumulation has been known to progress in diabetic patients, especially in those with a long history of disease. The sustained accumulation of AGEs could contribute to the phenomenon of metabolic memory or legacy effects observed in long-term follow-up clinical studies of diabetic patients. AGE modification alters the structural integrity and function of various types of macromolecules, and interaction of AGEs with a receptor for AGEs (RAGE) has been shown to evoke inflammatory and thrombotic reactions. Therefore, the AGE–RAGE axis is a novel therapeutic target of atherosclerotic cardiovascular disease in diabetic patients. In this paper, we briefly review the pathological role of AGEs and their receptor RAGE system in atherosclerotic cardiovascular disease, including peripheral artery disease and discuss the clinical utility of measuring AGEs in evaluating the severity of atherosclerosis in patients with diabetes.
Collapse
Affiliation(s)
- Sho-Ichi Yamagishi
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - Takanori Matsui
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| |
Collapse
|
30
|
Association of skin autofluorescence with plaque vulnerability evaluated by optical coherence tomography in patients with cardiovascular disease. Atherosclerosis 2018; 274:47-53. [DOI: 10.1016/j.atherosclerosis.2018.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 01/12/2018] [Accepted: 03/01/2018] [Indexed: 12/23/2022]
|
31
|
Yamagishi SI, Matsui T. Role of Ligands of Receptor for Advanced Glycation End Products (RAGE) in Peripheral Artery Disease. Rejuvenation Res 2018; 21:456-463. [PMID: 29644926 DOI: 10.1089/rej.2017.2025] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Atherosclerotic cardiovascular disease, including peripheral artery disease (PAD), is more common and severe in diabetic patients compared with nondiabetic individuals. Indeed, diabetes is associated with the increased risk of limb amputation and all-cause mortality in patients with symptomatic PAD. Proteins and lipids are nonenzymatically modified by sugars, resulting in the formation and accumulation of advanced glycation end products (AGEs), whose process is accelerated under diabetic conditions, especially patients with a long duration of diabetes. Accumulating evidence shows that nonenzymatic modification by sugars alters the structural integrity of collagens and lipoproteins in large vessels, thereby being involved in vascular stiffness and atherosclerotic plaque instability. Furthermore, engagement of receptor for AGEs (RAGE) with its ligands, such as AGEs, high mobility group box 1, and S100A proteins evokes inflammatory and thrombotic reactions, thus playing a central role in the development and progression of atherosclerotic cardiovascular disease. In this article, we review the pathophysiological role of RAGE ligands in PAD and discuss the clinical utility of measurement of plasma, serum, or tissue RAGE ligands for assessment of the severity and prognosis of PAD. This review suggests that RAGE ligands may be a novel biomarker and also a therapeutic target of PAD, especially in patients with diabetes.
Collapse
Affiliation(s)
- Sho-Ichi Yamagishi
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine , Kurume, Japan
| | - Takanori Matsui
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine , Kurume, Japan
| |
Collapse
|
32
|
Raggi P. Atherosclerosis imaging to refine cardiovascular risk assessment in diabetic patients: Computed tomography and positron emission tomography applications. Atherosclerosis 2018; 271:77-83. [PMID: 29477560 DOI: 10.1016/j.atherosclerosis.2018.02.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 02/09/2018] [Accepted: 02/14/2018] [Indexed: 01/24/2023]
Abstract
The lifetime cardiovascular risk of a diabetic patient is approximately 4-5 times higher than that of an age and sex matched individual without diabetes mellitus. Despite the well-publicized cardiovascular risk equivalence of diabetes mellitus, it has become apparent that not all diabetic patients are equally at high-risk and many patients may have a level of risk similar to that of the general population. Cardiovascular imaging has been employed to address the dilemma of a more accurate risk stratification of diabetic patients. Two randomized clinical trials aiming at uncovering the presence of unknown obstructive coronary artery disease (CAD) gave disappointing results. In fact, the number of patients with inducible myocardial ischemia and/or severe obstructive disease was lower than expected and the overall outcome was not improved after having brought the existence of CAD to light. Other techniques that may help identify a diabetic patient susceptible to suffer future events have therefore being explored. In this review we discuss two imaging tools that provide anatomical and functional information on pre-clinical coronary atherosclerosis: computed tomography for calcium scoring, and plaque characterization and myocardial ischemia detection and positron emission tomography using tracers to identify functionally unstable plaques. Despite the availability of several imaging techniques there remain numerous questions as to the utility of imaging to define risk in diabetes mellitus and an optimal approach has yet to be found.
Collapse
Affiliation(s)
- Paolo Raggi
- Mazankowski Alberta Heart Institute, Canada; University of Alberta, Edmonton, AB, Canada.
| |
Collapse
|
33
|
Lechuga-Sancho AM, Gallego-Andujar D, Ruiz-Ocaña P, Visiedo FM, Saez-Benito A, Schwarz M, Segundo C, Mateos RM. Obesity induced alterations in redox homeostasis and oxidative stress are present from an early age. PLoS One 2018; 13:e0191547. [PMID: 29370267 PMCID: PMC5784965 DOI: 10.1371/journal.pone.0191547] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Accepted: 01/08/2018] [Indexed: 12/11/2022] Open
Abstract
Objectives Oxidative stress and inflammation have been postulated as underlying mechanisms for the development of obesity-related insulin resistance. This association however, remains elusive especially in childhood. We sought to investigate this relation by measuring oxidative stress and antioxidant response biomarkers, before and during an oral glucose tolerance test (OGTT), in different biological samples from obese children. Subjects 24 children were recruited for the study, (18 obese and 6 controls). After OGTT, the obese group was subdivided in two, according to whether or not carbohydrate metabolic impairment (Ob.IR+, Ob.IR-; respectively) was found. Different biomarkers were analyzed after fasting (T = 0) and during an OGTT (T = 60 and 120 min). Lipoperoxides were measured in plasma, erythrocytes, and urine; while advanced glycation end products were determined in plasma, and redox status (GSH/GSSG ratio) in erythrocytes. Results We found marked differences in the characterization of the oxidative status in urine and erythrocytes, and in the dynamics of the antioxidant response during OGTT. Specifically, Ob.IR+ children show increased oxidative stress, deficient antioxidant response and a significant imbalance in redox status, in comparison to controls and Ob.IR- children. Conclusion Obese children with insulin resistance show increased levels of oxidative stress biomarkers, and a stunted antioxidant response to an OGTT leading to increased oxidative stress after a single glucose load, as detected in erythrocytes, but not in plasma. We propose erythrocytes as sensors of early and acute changes in oxidative stress associated with insulin resistance in childhood obesity. This is a pilot study, performed with a limited sample size, so data should be interpreted with caution until reproduced.
Collapse
Affiliation(s)
- Alfonso M. Lechuga-Sancho
- Research Unit, Puerta del Mar University Hospital, Cadiz, Spain
- Pediatrics Department, Puerta del Mar University Hospital, Cádiz, Spain
- Department of Child and Mother Health and Radiology, Cadiz University Medical School, Cadiz, Spain
| | | | - Pablo Ruiz-Ocaña
- Pediatrics Department, Puerta del Mar University Hospital, Cádiz, Spain
| | | | - Ana Saez-Benito
- Clinical Analysis Department, Puerta del Mar University Hospital, Cádiz, Spain
| | - Mónica Schwarz
- “Salus Infirmorum” Faculty of Nursing. Cadiz University, Cadiz, Spain
| | - Carmen Segundo
- “Salus Infirmorum” Faculty of Nursing. Cadiz University, Cadiz, Spain
| | - Rosa M. Mateos
- Research Unit, Puerta del Mar University Hospital, Cadiz, Spain
- Pediatrics Department, Puerta del Mar University Hospital, Cádiz, Spain
- Department of Biotechnology, Biomedicine and Public Health, Cadiz University Medical School, Cadiz, Spain
- * E-mail:
| |
Collapse
|
34
|
Han E, Lee YH. Non-Alcoholic Fatty Liver Disease: The Emerging Burden in Cardiometabolic and Renal Diseases. Diabetes Metab J 2017; 41:430-437. [PMID: 29199410 PMCID: PMC5741551 DOI: 10.4093/dmj.2017.41.6.430] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 11/12/2017] [Indexed: 12/20/2022] Open
Abstract
As the number of individuals with non-alcoholic fatty liver disease (NAFLD) has increased, the influence of NAFLD on other metabolic diseases has been highlighted. Accumulating epidemiologic evidence indicates that NAFLD not only affects the liver but also increases the risk of extra-hepatic diseases such as type 2 diabetes mellitus, metabolic syndrome, dyslipidemia, hypertension, cardiovascular or cerebrovascular diseases, and chronic kidney disease. Non-alcoholic steatohepatitis, an advanced type of NAFLD, can aggravate these inter-organ relationships and lead to poorer outcomes. NAFLD induces insulin resistance and exacerbates systemic chronic inflammation and oxidative stress, which leads to organ dysfunction in extra-hepatic tissues. Although more research is needed to identify the pathophysiological mechanisms and causal relationship between NAFLD and cardiometabolic and renal diseases, screening for heart, brain, and kidney diseases, risk assessment for diabetes, and a multidisciplinary approach for managing these patients should be highly encouraged.
Collapse
Affiliation(s)
- Eugene Han
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
- Graduate School, Yonsei University College of Medicine, Seoul, Korea
| | - Yong Ho Lee
- Graduate School, Yonsei University College of Medicine, Seoul, Korea
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
| |
Collapse
|
35
|
Impact of intracellular glyceraldehyde-derived advanced glycation end-products on human hepatocyte cell death. Sci Rep 2017; 7:14282. [PMID: 29079763 PMCID: PMC5660208 DOI: 10.1038/s41598-017-14711-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 10/16/2017] [Indexed: 02/06/2023] Open
Abstract
Hepatocyte cell death is a key feature of nonalcoholic steatohepatitis (NASH); however, the pathogenesis of NASH currently remains unclear. We aimed to investigate the effects of intracellular glyceraldehyde (GA)-derived advanced glycation end-products (GA-AGEs) on human hepatocyte cell death. The accumulation of intracellular GA-AGEs has been associated with the induction of DNA damage and hepatocyte necrotic cell death. Among intracellular GA-AGEs, caspase-3 has been identified as a GA-AGE-modified protein with abrogated protein function. Furthermore, the activation of caspase-3 and induction of hepatocyte apoptosis by camptothecin, a DNA-damaging agent, was suppressed by a treatment with GA. These results suggest the inhibitory effects of GA-AGE-modified caspase-3 on the induction of DNA-damage-induced apoptosis, which is associated with hepatocyte necrosis. Therefore, the suppression of necrosis, the inflammatory form of cell death, by the accumulation of GA-AGEs and GA-AGE-modified caspase-3 may represent a novel therapeutic target for the pathogenesis of NASH.
Collapse
|
36
|
Takeuchi M, Takino JI, Sakasai-Sakai A, Takata T, Tsutsumi M. Toxic AGE (TAGE) Theory for the Pathophysiology of the Onset/Progression of NAFLD and ALD. Nutrients 2017; 9:E634. [PMID: 28632197 PMCID: PMC5490613 DOI: 10.3390/nu9060634] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 06/06/2017] [Accepted: 06/16/2017] [Indexed: 02/06/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) and alcoholic liver disease (ALD) are among the most common causes of chronic liver diseases in the westernized world. NAFLD and ALD are frequently accompanied by extrahepatic complications, including hepatocellular carcinoma and cardiovascular diseases, which have a negative impact on patient survival. The chronic ingestion of an excessive daily diet containing sugar/high-fructose corn syrup increases the level of the fructose/glucose metabolite, glyceraldehyde (GA), while the chronic consumption of an excessive number of alcoholic beverages increases the level of the alcohol metabolite, acetaldehyde (AA) in the liver. GA and AA are known to react non-enzymatically with the ε- or α-amino groups of proteins, thereby generating advanced glycation end-products (AGEs, GA-AGEs, and AA-AGEs, respectively) in vivo. The interaction between GA-AGEs and the receptor for AGEs (RAGE) alters intracellular signaling, gene expression, and the release of pro-inflammatory molecules and also elicits the production of reactive oxygen species by human hepatocytes and hepatic stellate cells, all of which may contribute to the pathological changes associated with chronic liver diseases. We herein discuss the pathophysiological roles of GA-AGEs and AA-AGEs (toxic AGEs, TAGE) and a related novel theory for preventing the onset/progression of NAFLD and ALD.
Collapse
Affiliation(s)
- Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku, Ishikawa 920-0293, Japan.
| | - Jun-Ichi Takino
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1, Hirokoshingai, Kure, Hiroshima 737-0112, Japan.
| | - Akiko Sakasai-Sakai
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku, Ishikawa 920-0293, Japan.
| | - Takanobu Takata
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku, Ishikawa 920-0293, Japan.
| | - Mikihiro Tsutsumi
- Department of Hepatology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku, Ishikawa 920-0293, Japan.
| |
Collapse
|
37
|
Takahashi A, Takabatake Y, Kimura T, Maejima I, Namba T, Yamamoto T, Matsuda J, Minami S, Kaimori JY, Matsui I, Matsusaka T, Niimura F, Yoshimori T, Isaka Y. Autophagy Inhibits the Accumulation of Advanced Glycation End Products by Promoting Lysosomal Biogenesis and Function in the Kidney Proximal Tubules. Diabetes 2017; 66:1359-1372. [PMID: 28246295 DOI: 10.2337/db16-0397] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 02/20/2017] [Indexed: 11/13/2022]
Abstract
Advanced glycation end products (AGEs) are involved in the progression of diabetic nephropathy. AGEs filtered by glomeruli or delivered from the circulation are endocytosed and degraded in the lysosomes of kidney proximal tubular epithelial cells (PTECs). Autophagy is a highly conserved degradation system that regulates intracellular homeostasis by engulfing cytoplasmic components. We have recently demonstrated that autophagic degradation of damaged lysosomes is indispensable for cellular homeostasis in some settings. In this study, we tested the hypothesis that autophagy could contribute to the degradation of AGEs in the diabetic kidney by modulating lysosomal biogenesis. Both a high-glucose and exogenous AGE overload gradually blunted autophagic flux in the cultured PTECs. AGE overload upregulated lysosomal biogenesis and function in vitro, which was inhibited in autophagy-deficient PTECs because of the impaired nuclear translocation of transcription factor EB. Consistently, streptozotocin-treated, PTEC-specific, autophagy-deficient mice failed to upregulate lysosomal biogenesis and exhibited the accumulation of AGEs in the glomeruli and renal vasculature as well as in the PTECs, along with worsened inflammation and fibrosis. These results indicate that autophagy contributes to the degradation of AGEs by the upregulation of lysosomal biogenesis and function in diabetic nephropathy. Strategies aimed at promoting lysosomal function hold promise for treating diabetic nephropathy.
Collapse
Affiliation(s)
- Atsushi Takahashi
- Department of Nephrology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yoshitsugu Takabatake
- Department of Nephrology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tomonori Kimura
- Department of Nephrology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Ikuko Maejima
- Laboratory of Molecular Traffic, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Gunma, Japan
| | - Tomoko Namba
- Department of Nephrology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Takeshi Yamamoto
- Department of Nephrology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Jun Matsuda
- Department of Nephrology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Satoshi Minami
- Department of Nephrology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Jun-Ya Kaimori
- Department of Advanced Technology for Transplantation, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Isao Matsui
- Department of Nephrology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Taiji Matsusaka
- Institute of Medical Science and Department of Internal Medicine, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Fumio Niimura
- Department of Pediatrics, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Tamotsu Yoshimori
- Department of Genetics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yoshitaka Isaka
- Department of Nephrology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| |
Collapse
|
38
|
Watanabe M, Toyomura T, Wake H, Liu K, Teshigawara K, Takahashi H, Nishibori M, Mori S. Advanced glycation end products attenuate the function of tumor necrosis factor-like weak inducer of apoptosis to regulate the inflammatory response. Mol Cell Biochem 2017; 434:153-162. [DOI: 10.1007/s11010-017-3045-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 04/25/2017] [Indexed: 12/31/2022]
|
39
|
Tahara A, Tahara N, Yamagishi SI, Honda A, Igata S, Nitta Y, Bekki M, Nakamura T, Sugiyama Y, Sun J, Takeuchi M, Shimizu M, Yamazaki H, Fukami K, Fukumoto Y. Ratio of serum levels of AGEs to soluble RAGE is correlated with trimethylamine-N-oxide in non-diabetic subjects. Int J Food Sci Nutr 2017; 68:1013-1020. [PMID: 28434257 DOI: 10.1080/09637486.2017.1318117] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Trimethylamine (TMA), an intestinal microflora-dependent metabolite formed from phosphatidylcholine- and L-carnitine-rich food, such as red meat, is further converted to trimethylamine-N-oxide (TMAO), which could play a role in cardiometabolic disease. Red meat-derived products are one of the major environmental sources of advanced glycation end products (AGEs) that may also contribute to the pathogenesis of cardiometabolic disorders through the interaction with receptor for AGEs (RAGE). However, the relationship among AGEs, soluble form of RAGE (sRAGE) and TMAO in humans remains unclear. Non-diabetic subjects underwent a physical examination, determination of blood chemistry and anthropometric variables, including AGEs, sRAGE, TMA and TMAO. Multiple regression analyses revealed that HbA1c, uric acid and AGEs were independently associated with log TMA, whereas log AGEs to sRAGE ratio and statin non-use were independently correlated with log TMAO. Our present findings indicated that AGEs to sRAGE ratio was correlated with log TMAO, a marker of cardiometabolic disorders.
Collapse
Affiliation(s)
- Atsuko Tahara
- a Department of Medicine, Division of Cardiovascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Nobuhiro Tahara
- a Department of Medicine, Division of Cardiovascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Sho-Ichi Yamagishi
- b Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications , Kurume University School of Medicine , Kurume , Japan
| | - Akihiro Honda
- a Department of Medicine, Division of Cardiovascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Sachiyo Igata
- a Department of Medicine, Division of Cardiovascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Yoshikazu Nitta
- a Department of Medicine, Division of Cardiovascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Munehisa Bekki
- a Department of Medicine, Division of Cardiovascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Tomohisa Nakamura
- a Department of Medicine, Division of Cardiovascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Yoichi Sugiyama
- a Department of Medicine, Division of Cardiovascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Jiahui Sun
- a Department of Medicine, Division of Cardiovascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Masayoshi Takeuchi
- c Department of Advanced Medicine, Medical Research Institute , Kanazawa Medical University , Ishikawa , Japan
| | - Makiko Shimizu
- d Laboratory of Drug Metabolism and Pharmacokinetics , Showa Pharmaceutical University , Tokyo , Japan
| | - Hiroshi Yamazaki
- d Laboratory of Drug Metabolism and Pharmacokinetics , Showa Pharmaceutical University , Tokyo , Japan
| | - Kei Fukami
- e Department of Medicine, Division of Nephrology , Kurume University School of Medicine , Kurume , Japan
| | - Yoshihiro Fukumoto
- a Department of Medicine, Division of Cardiovascular Medicine , Kurume University School of Medicine , Kurume , Japan
| |
Collapse
|
40
|
Ishibashi Y, Matsui T, Isami F, Abe Y, Sakaguchi T, Higashimoto Y, Yamagishi SI. N-butanol extracts of Morinda citrifolia suppress advanced glycation end products (AGE)-induced inflammatory reactions in endothelial cells through its anti-oxidative properties. Altern Ther Health Med 2017; 17:137. [PMID: 28259164 PMCID: PMC5336679 DOI: 10.1186/s12906-017-1641-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 02/21/2017] [Indexed: 02/02/2023]
Abstract
Background Advanced glycation end products (AGEs), senescent macroprotein derivatives formed during a normal aging process and acceleratedly under diabetic conditions, play a role in atherosclerotic cardiovascular disease. AGEs cause endothelial cell (EC) damage, an initial trigger for atherosclerosis through the interaction with a receptor for AGEs (RAGE). We have previously shown that n-butanol extracts of Morinda citrifolia (noni), a plant belonging to the family Rubiaceae, block the binding of AGEs to RAGE in vitro. In this study, we examined the effects of n-butanol extracts of noni on reactive oxygen species (ROS) generation and inflammatory reactions on AGE-exposed human umbilical vein ECs (HUVECs). Methods HUVECs were treated with 100 μg/ml AGE-bovine serum albumin (AGE-BSA) or non-glycated BSA in the presence or absence of 670 ng/ml n-butanol extracts of noni for 4 h. Then ROS generation and inflammatory and gene expression in HUVECs were evaluated by dihydroethidium staining and real-time reverse transcription-polymerase chain reaction analyses, respectively. THP-1 cell adhesion to HUVECs was measured after 2-day incubation of AGE-BSA or BSA in the presence or absence of 670 ng/ml n-butanol extracts of noni. Results N-butanol extracts of noni at 670 ng/ml significantly inhibited the AGE-induced ROS generation and RAGE, intercellular adhesion molecule-1 and plasminogen activator inhibitor-1 gene expressions in HUVECs. AGEs significantly increased monocytic THP-1 cell adhesion to HUVECs, which was also prevented by 670 ng/ml n-butanol extracts of noni. Conclusions The present study demonstrated for the first time that N-butanol extracts of noni could suppress the AGE-induced inflammatory reactions in HUVECs through its anti-oxidative properties via blocking of the interaction of AGEs with RAGE. Inhibition of the AGE-RAGE axis by n-butanol extracts of noni may be a novel nutraceutical strategy for the treatment of cardiovascular disease.
Collapse
|
41
|
Yamagishi SI, Nakamura N, Matsui T. Glycation and cardiovascular disease in diabetes: A perspective on the concept of metabolic memory. J Diabetes 2017; 9:141-148. [PMID: 27556881 DOI: 10.1111/1753-0407.12475] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 07/25/2016] [Accepted: 08/20/2016] [Indexed: 12/16/2022] Open
Abstract
Epidemiological studies have suggested that cumulative diabetic exposure, namely prolonged exposure to chronic hyperglycemia, contributes to the increased risk of cardiovascular disease (CVD) in diabetes. The formation and accumulation of advanced glycation end-products (AGEs) have been known to progress under hyperglycemic conditions. Because AGEs-modified collagens are hardly degraded and remain in diabetic vessels, kidneys and the heart for a long time, even after glycemic control has been achieved, AGEs could become a marker reflecting cumulative diabetic exposure. Furthermore, there is a growing body of evidence that an interaction between AGEs and the receptor for AGEs (RAGE) plays a role in the pathogenesis of CVD. In addition, AGEs induce the expression of RAGE, thus leading to sustained activation of the AGEs-RAGE axis in diabetes. Herein we review the pathological role of the AGEs-RAGE axis in CVD, focusing particularly on the phenomenon of metabolic memory, and discuss the potential clinical usefulness of measuring circulating and tissue levels of AGEs accumulation to evaluate diabetic macrovascular complications.
Collapse
Affiliation(s)
- Sho-Ichi Yamagishi
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| | - Nobutaka Nakamura
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| | - Takanori Matsui
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| |
Collapse
|
42
|
de Vos LC, Lefrandt JD, Dullaart RP, Zeebregts CJ, Smit AJ. Advanced glycation end products: An emerging biomarker for adverse outcome in patients with peripheral artery disease. Atherosclerosis 2016; 254:291-299. [DOI: 10.1016/j.atherosclerosis.2016.10.012] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 10/05/2016] [Accepted: 10/06/2016] [Indexed: 11/30/2022]
|
43
|
Tomosugi N, Yamamoto S, Takeuchi M, Yonekura H, Ishigaki Y, Numata N, Katsuda S, Sakai Y. Effect of Collagen Tripeptide on Atherosclerosis in Healthy Humans. J Atheroscler Thromb 2016; 24:530-538. [PMID: 27725401 PMCID: PMC5429168 DOI: 10.5551/jat.36293] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
AIM Collagen tripeptide (CTP) is a functional food with a high content of Gly-X-Y tripeptides derived from collagen. The objective of this study was to evaluate the effect of CTP administration on the development of atherosclerosis in healthy individuals. METHODS The present study was conducted in the form of an open-label, single-dose trial for 6 months. All subjects ingested CTP twice daily: at breakfast and supper (total intake per day: 16 g). The effect of CTP on atherosclerosis was verified by measuring several indices, including serum lipid levels, toxic advanced glycation end-products (TAGE), and the cardio-ankle vascular index (CAVI), at baseline and 6 months. RESULTS The low-density lipoprotein cholesterol (LDL-C) to high-density lipoprotein cholesterol (HDL-C) ratio (LDL-C/HDL-C ratio) was significantly reduced in patients with an initial ratio of ≥2.5 (p=0.025). A significant reduction in TAGE was observed in all the subjects (p=0.031) and in the high-risk group (p=0.024). A significant reduction in CAVI was observed in all the subjects (right side: p=0.048, left side: p=0.047). As a result of multiple regression analysis, a significant relationship between the change in CAVI and that in each factor was not observed. No adverse events were observed during the study period. CONCLUSIONS The results of the present study indicate that CTP contributes to the prevention and treatment of atherosclerosis in healthy humans (UMIN000018525).
Collapse
Affiliation(s)
- Naohisa Tomosugi
- Division of Aging Research, Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University
| | | | - Masayoshi Takeuchi
- Division of AGEs Research, Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University
| | | | - Yasuhito Ishigaki
- Division of Molecular Oncology and Virology, Department of Life Science, Medical Research Institute, Kanazawa Medical University
| | | | - Shogo Katsuda
- Department of Pathology II, President of Kanazawa Medical University
| | - Yasuo Sakai
- Central Research Institute, Jellice Co., Ltd
| |
Collapse
|
44
|
Yamagishi SI, Matsui T. Protective role of sulphoraphane against vascular complications in diabetes. PHARMACEUTICAL BIOLOGY 2016; 54:2329-2339. [PMID: 26841240 DOI: 10.3109/13880209.2016.1138314] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Context Diabetes is a global health challenge. Although large prospective clinical trials have shown that intensive control of blood glucose or blood pressure reduces the risk for development and progression of vascular complications in diabetes, a substantial number of diabetic patients still experience renal failure and cardiovascular events, which could account for disabilities and high mortality rate in these subjects. Objective Sulphoraphane is a naturally occurring isothiocyanate found in widely consumed cruciferous vegetables, such as broccoli, cabbage and Brussels sprouts, and an inducer of phase II antioxidant and detoxification enzymes with anticancer properties. We reviewed here the protective role of sulphoraphane against diabetic vascular complications. Methods In this review, literature searches were undertaken in Medline and in CrossRef. Non-English language articles were excluded. Keywords [sulphoraphane and (diabetes, diabetic nephropathy, diabetic retinopathy, diabetic neuropathy, diabetic complications, vascular, cardiomyocytes, heart or glycation)] have been used to select the articles. Results There is accumulating evidence that sulphoraphane exerts beneficial effects on vascular damage in both cell culture and diabetic animal models via antioxidative properties. Furthermore, we have recently found that sulphoraphane inhibits in vitro formation of advanced glycation end products (AGEs), suppresses the AGE-induced inflammatory reactions in rat aorta by reducing receptor for AGEs (RAGE) expression and decreases serum levels of AGEs in humans. Conclusion These findings suggest that blockade of oxidative stress and/or the AGE-RAGE axis by sulphoraphane may be a novel therapeutic strategy for preventing vascular complications in diabetes.
Collapse
Affiliation(s)
- Sho-Ichi Yamagishi
- a Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications , Kurume University School of Medicine , Kurume , Japan
| | - Takanori Matsui
- a Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications , Kurume University School of Medicine , Kurume , Japan
| |
Collapse
|
45
|
Watanabe M, Kawai Y, Kitayama M, Akao H, Motoyama A, Wakasa M, Saito R, Aoki H, Fujibayashi K, Tsuchiya T, Nakanishi H, Saito K, Takeuchi M, Kajinami K. Diurnal glycemic fluctuation is associated with severity of coronary artery disease in prediabetic patients: Possible role of nitrotyrosine and glyceraldehyde-derived advanced glycation end products. J Cardiol 2016; 69:625-631. [PMID: 27470137 DOI: 10.1016/j.jjcc.2016.07.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 06/10/2016] [Accepted: 07/04/2016] [Indexed: 11/18/2022]
Abstract
BACKGROUND Glucose fluctuation (GF) is a risk factor for coronary artery disease (CAD). However, it remains unknown whether specific indices of GF are risk factors for CAD. Therefore, we evaluated the relationship between GF, as determined by a continuous glucose monitoring system (CGMS) or the glucose level at 2h after a 75-g oral glucose tolerance test (75g OGTT 120), and the severity of CAD in prediabetic patients. We also evaluated whether nitrotyrosine (NT) and glyceraldehyde-derived advanced glycation end-products (Glycer-AGE) were induced by GF. METHODS Twenty-eight prediabetic patients underwent coronary angiography (CAG), and the Gensini score and the SYNTAX score were evaluated as the severity of CAD, while the mean amplitude of glycemic excursions (MAGE) by CGMS and 75g OGTT 120 were evaluated. Serum NT and Glycer-AGE were measured. RESULTS The MAGE was closely associated with the Gensini score (r=0.742, p<0.001) and the SYNTAX score (r=0.776, p<0.001), respectively. The 75g OGTT 120 was not associated with the Gensini score (r=0.36, p=0.06), but it was significantly associated with the SYNTAX score (r=0.413, p=0.036). Multiple linear regression analysis showed that the MAGE was the only independent determinant for the severity of CAD. The levels of NT and Glycer-AGE were significantly higher in the high MAGE group than in the low MAGE group. CONCLUSIONS Diurnal GF is associated with the severity of CAD, even in prediabetic patients. GF, NT, and Glycer-AGE may play a pathological role in the progression of CAD.
Collapse
Affiliation(s)
- Makoto Watanabe
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| | - Yasuyuki Kawai
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan.
| | | | - Hironubu Akao
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| | - Atsushi Motoyama
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| | - Minoru Wakasa
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| | - Ryuhei Saito
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| | - Hirofumi Aoki
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| | | | | | - Hiroaki Nakanishi
- Department of Forensic Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazuyuki Saito
- Department of Forensic Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Ishikawa, Japan
| | - Kouji Kajinami
- Department of Cardiology, Kanazawa Medical University, Ishikawa, Japan
| |
Collapse
|
46
|
Takeuchi M. Serum Levels of Toxic AGEs (TAGE) May Be a Promising Novel Biomarker for the Onset/Progression of Lifestyle-Related Diseases. Diagnostics (Basel) 2016; 6:E23. [PMID: 27338481 PMCID: PMC4931418 DOI: 10.3390/diagnostics6020023] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 05/30/2016] [Accepted: 06/01/2016] [Indexed: 12/11/2022] Open
Abstract
Advanced glycation end-products (AGEs) generated with aging or in the presence of diabetes mellitus, particularly AGEs derived from the glucose/fructose metabolism intermediate glyceraldehyde (Glycer-AGEs; termed toxic AGEs (TAGE)), were recently shown to be closely involved in the onset/progression of diabetic vascular complications via the receptor for AGEs (RAGE). TAGE also contribute to various diseases, such as cardiovascular disease; nonalcoholic steatohepatitis; cancer; Alzheimer's disease, and; infertility. This suggests the necessity of minimizing the influence of the TAGE-RAGE axis in order to prevent the onset/progression of lifestyle-related diseases (LSRD) and establish therapeutic strategies. Changes in serum TAGE levels are closely associated with LSRD related to overeating, a lack of exercise, or excessive ingestion of sugars/dietary AGEs. We also showed that serum TAGE levels, but not those of hemoglobin A1c, glucose-derived AGEs, or Nε-(carboxymethyl)lysine, have potential as a biomarker for predicting the progression of atherosclerosis and future cardiovascular events. We herein introduce the usefulness of serum TAGE levels as a biomarker for the prevention/early diagnosis of LSRD and the evaluation of the efficacy of treatments; we discuss whether dietary AGE/sugar intake restrictions reduce the generation/accumulation of TAGE, thereby preventing the onset/progression of LSRD.
Collapse
Affiliation(s)
- Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Uchinada-machi, Kahoku, Ishikawa 920-0293, Japan.
| |
Collapse
|
47
|
Kong SY, Takeuchi M, Hyogo H, McKeown-Eyssen G, Yamagishi SI, Chayama K, O'Brien PJ, Ferrari P, Overvad K, Olsen A, Tjønneland A, Boutron-Ruault MC, Bastide N, Carbonnel F, Kühn T, Kaaks R, Boeing H, Aleksandrova K, Trichopoulou A, Lagiou P, Vasilopoulou E, Masala G, Pala V, Santucci De Magistris M, Tumino R, Naccarati A, Bueno-de-Mesquita HB, Peeters PH, Weiderpass E, Quirós JR, Jakszyn P, Sánchez MJ, Dorronsoro M, Gavrila D, Ardanaz E, Rutegård M, Nyström H, Wareham NJ, Khaw KT, Bradbury KE, Romieu I, Freisling H, Stavropoulou F, Gunter MJ, Cross AJ, Riboli E, Jenab M, Bruce WR. The Association between Glyceraldehyde-Derived Advanced Glycation End-Products and Colorectal Cancer Risk. Cancer Epidemiol Biomarkers Prev 2015; 24:1855-63. [PMID: 26404963 PMCID: PMC6284787 DOI: 10.1158/1055-9965.epi-15-0422] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Accepted: 07/28/2015] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND A large proportion of colorectal cancers are thought to be associated with unhealthy dietary and lifestyle exposures, particularly energy excess, obesity, hyperinsulinemia, and hyperglycemia. It has been suggested that these processes stimulate the production of toxic reactive carbonyls from sugars such as glyceraldehyde. Glyceraldehyde contributes to the production of a group of compounds known as glyceraldehyde-derived advanced glycation end-products (glycer-AGEs), which may promote colorectal cancer through their proinflammatory and pro-oxidative properties. The objective of this study nested within a prospective cohort was to explore the association of circulating glycer-AGEs with risk of colorectal cancer. METHODS A total of 1,055 colorectal cancer cases (colon n = 659; rectal n = 396) were matchced (1:1) to control subjects. Circulating glycer-AGEs were measured by a competitive ELISA. Multivariable conditional logistic regression models were used to calculate ORs and 95% confidence intervals (95% CI), adjusting for potential confounding factors, including smoking, alcohol, physical activity, body mass index, and diabetes status. RESULTS Elevated glycer-AGEs levels were not associated with colorectal cancer risk (highest vs. lowest quartile, 1.10; 95% CI, 0.82-1.49). Subgroup analyses showed possible divergence by anatomical subsites (OR for colon cancer, 0.83; 95% CI, 0.57-1.22; OR for rectal cancer, 1.90; 95% CI, 1.14-3.19; Pheterogeneity = 0.14). CONCLUSIONS In this prospective study, circulating glycer-AGEs were not associated with risk of colon cancer, but showed a positive association with the risk of rectal cancer. IMPACT Further research is needed to clarify the role of toxic products of carbohydrate metabolism and energy excess in colorectal cancer development.
Collapse
Affiliation(s)
- So Yeon Kong
- Section of Nutrition and Metabolism, International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Kanazawa, Japan
| | - Hideyuki Hyogo
- Department of Gastroenterology and Metabolism, Hiroshima University Hospital, Hiroshima, Japan
| | | | - Sho-Ichi Yamagishi
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| | - Kazuaki Chayama
- Department of Gastroenterology and Metabolism, Hiroshima University Hospital, Hiroshima, Japan
| | - Peter J O'Brien
- Department of Pharmacology, University of Toronto, Toronto, Canada
| | - Pietro Ferrari
- Section of Nutrition and Metabolism, International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - Kim Overvad
- Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark
| | - Anja Olsen
- Diet, Genes, and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Anne Tjønneland
- Diet, Genes, and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Marie-Christine Boutron-Ruault
- Lifestyle, Genes, and Health: Trans-generational Integrated Epidemiology, EMT, Institute Gustave Roussy, Villejuif, France
| | - Nadia Bastide
- Lifestyle, Genes, and Health: Trans-generational Integrated Epidemiology, EMT, Institute Gustave Roussy, Villejuif, France
| | - Franck Carbonnel
- Lifestyle, Genes, and Health: Trans-generational Integrated Epidemiology, EMT, Institute Gustave Roussy, Villejuif, France. Service d'hépato-gastroentérologie, Hôpital Bicetre, Le Kremlin-Bicêtre Cedex, France
| | - Tilman Kühn
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Rudolf Kaaks
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Heiner Boeing
- Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - Krasimira Aleksandrova
- Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - Antonia Trichopoulou
- Hellenic Health Foundation, Athens, Greece. Department of Hygiene, Epidemiology, and Medical Statistics, University of Athens Medical School, Athens, Greece. Bureau of Epidemiologic Research, Academy of Athens, Athens, Greece
| | - Pagona Lagiou
- Department of Hygiene, Epidemiology, and Medical Statistics, University of Athens Medical School, Athens, Greece. Bureau of Epidemiologic Research, Academy of Athens, Athens, Greece. Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts
| | - Effie Vasilopoulou
- Department of Hygiene, Epidemiology, and Medical Statistics, University of Athens Medical School, Athens, Greece
| | - Giovanna Masala
- Molecular and Nutritional Epidemiology Unit, Cancer Research and Prevention Institute - ISPO, Florence, Italy
| | - Valeria Pala
- Epidemiology and Prevention Unit, IRCCS Foundation, National Cancer Institute, Milan, Italy
| | | | - Rosario Tumino
- Cancer Registry and Histopathology Unit, "Civic - MP Arezzo" Hospital, Ragusa, Italy
| | - Alessio Naccarati
- Human Genetics Foundation, Torino Molecular and Genetic Epidemiology Unit, Torino, Italy
| | - H B Bueno-de-Mesquita
- Department for Determinants of Chronic Diseases (DCD), National Institute for Public Health and Environment (RIVM), Bilthoven, the Netherlands. Department of Gastroenterology and Hepatology, University Medical Centre, Utrecht, the Netherlands. Department of Epidemiology and Biostatistics, The School of Public Health, Imperil College London, London, United Kingdom. Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Petra H Peeters
- Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands. MRC-PHE Centre for Environment and Health, Department of Epidemiology and Biostatics, School of Public Health, Imperial College, London, United Kingdom
| | - Elisabete Weiderpass
- Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway. Cancer Registry of Norway, Oslo, Norway. Department of Medical Epidemiology and Biostatistics, Karolinska Instituet, Stockholm, Sweden. Department of Genetic Epidemiology, Folkhälsan Research Center, Helsinki, Finland
| | | | - Paula Jakszyn
- Unit of Nutrition, Environment, and Cancer, Cancer Epidemiology Research Program, Catalan Institute of Oncology, Barcelona, Spain
| | - María-José Sánchez
- CIBER Epidemiology and Public Health (CIBERESP), Spain. Escuela Andaluza de Salud Pública, Instituto de Investigación Biosanitaria ibs. GRANADA, Hospitales Universitarios de Granada/Universidad de Granada, Granada, Spain
| | - Miren Dorronsoro
- Public Health Direction and CIBERESP-Biodonostia Research Institute, Basque Regional Health Department, San Sebastian, Spain
| | - Diana Gavrila
- CIBER Epidemiology and Public Health (CIBERESP), Spain. Department of Epidemiology, Murcia Regional Health Council, IMIB-Arrixaca, Murcia, Spain
| | - Eva Ardanaz
- CIBER Epidemiology and Public Health (CIBERESP), Spain. Navarre Public Health Institute, Pamplona, Spain
| | - Martin Rutegård
- Department of Surgery, Department of Surgical and Perioperative Sciences, Umeå University, Sweden
| | - Hanna Nyström
- Department of Surgery, Department of Surgical and Perioperative Sciences, Umeå University, Sweden
| | - Nicholas J Wareham
- MRC Epidemiology Unit, Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Kay-Tee Khaw
- Clinical Gerontology Unit, Department of Public Health and Primary Care, Institute of Public Health, University of Cambridge, United Kingdom
| | - Kathryn E Bradbury
- Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom
| | - Isabelle Romieu
- Section of Nutrition and Metabolism, International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - Heinz Freisling
- Section of Nutrition and Metabolism, International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - Faidra Stavropoulou
- Section of Nutrition and Metabolism, International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - Marc J Gunter
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
| | - Amanda J Cross
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
| | - Elio Riboli
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
| | - Mazda Jenab
- Section of Nutrition and Metabolism, International Agency for Research on Cancer (IARC-WHO), Lyon, France.
| | - W Robert Bruce
- Department of Nutritional Sciences, University of Toronto, Toronto, Canada.
| |
Collapse
|
48
|
Yamagishi SI, Nakamura N, Suematsu M, Kaseda K, Matsui T. Advanced Glycation End Products: A Molecular Target for Vascular Complications in Diabetes. Mol Med 2015; 21 Suppl 1:S32-40. [PMID: 26605646 DOI: 10.2119/molmed.2015.00067] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 04/02/2015] [Indexed: 12/16/2022] Open
Abstract
A nonenzymatic reaction between reducing sugars and amino groups of proteins, lipids and nucleic acids contributes to the aging of macromolecules and subsequently alters their structural integrity and function. This process has been known to progress at an accelerated rate under hyperglycemic and/or oxidative stress conditions. Over a course of days to weeks, early glycation products undergo further reactions such as rearrangements and dehydration to become irreversibly cross-linked, fluorescent and senescent macroprotein derivatives termed advanced glycation end products (AGEs). There is a growing body of evidence indicating that interaction of AGEs with their receptor (RAGE) elicits oxidative stress generation and as a result evokes proliferative, inflammatory, thrombotic and fibrotic reactions in a variety of cells. This evidence supports AGEs' involvement in diabetes- and aging-associated disorders such as diabetic vascular complications, cancer, Alzheimer's disease and osteoporosis. Therefore, inhibition of AGE formation could be a novel molecular target for organ protection in diabetes. This report summarizes the pathophysiological role of AGEs in vascular complications in diabetes and discusses the potential clinical utility of measurement of serum levels of AGEs for evaluating organ damage in diabetes.
Collapse
Affiliation(s)
- Sho-Ichi Yamagishi
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| | - Nobutaka Nakamura
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| | - Mika Suematsu
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan.,Saravio Central Institute, Oita, Japan
| | | | - Takanori Matsui
- Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
| |
Collapse
|
49
|
Maeda S, Matsui T, Ojima A, Suematsu M, Kaseda K, Higashimoto Y, Yamakawa R, Yamagishi SI. DNA Aptamer Raised against Advanced Glycation End Products Prevents Abnormalities in Electroretinograms of Experimental Diabetic Retinopathy. Ophthalmic Res 2015; 54:175-80. [PMID: 26492350 DOI: 10.1159/000440768] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 09/01/2015] [Indexed: 11/19/2022]
Abstract
PURPOSE Abnormalities in electroretinograms (ERG), such as reduced amplitudes and delayed implicit times of a- and b-wave and oscillatory potentials (OPs), are one of the earliest features of diabetic retinopathy prior to obvious vascular changes in diabetic retinas. We have previously shown that serum levels of advanced glycation end products (AGEs) are correlated with a delayed latency of OPs in type 2 diabetic rats. However, the pathological role of AGEs in ERG abnormalities remains unclear. We examined here whether high-affinity DNA aptamer directed against AGEs (AGE-aptamer) prevents ERG abnormalities in experimental type 1 diabetic retinopathy. METHODS Streptozotocin-induced diabetic rats or control rats received continuous intraperitoneal infusion of either AGE-aptamer or control aptamer via an osmotic mini pump for 16 weeks. Anthropometric, metabolic, and hemodynamic variables were measured, and an ERG was performed. RESULTS Although AGE-aptamer did not affect body weight, fasting and random blood glucose, HbA1c, blood pressure, or lipid parameters, it completely prevented the increase in serum AGE levels as well as the reduction of a- and b-wave and OP amplitudes in diabetic rats. CONCLUSION The present study demonstrated for the first time that AGE-aptamer prevents abnormalities in ERG in experimental diabetic retinopathy probably by blocking the harmful effects of AGEs.
Collapse
Affiliation(s)
- Satoshi Maeda
- Department of Ophthalmology, Kurume University School of Medicine, Kurume, Japan
| | | | | | | | | | | | | | | |
Collapse
|
50
|
Matsui T, Joo HD, Lee JM, Ju SM, Tao WH, Higashimoto Y, Fukami K, Yamagishi SI. Development of a monoclonal antibody-based ELISA system for glyceraldehyde-derived advanced glycation end products. Immunol Lett 2015; 167:141-6. [DOI: 10.1016/j.imlet.2015.08.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 08/13/2015] [Accepted: 08/18/2015] [Indexed: 12/22/2022]
|