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Coll JC, Turcotte AF, Leslie WD, Michou L, Weisnagel SJ, Mac-Way F, Albert C, Berger C, Morin SN, Rabasa-Lhoret R, Gagnon C. Advanced glycation end products are not associated with bone mineral density, trabecular bone score, and bone turnover markers in adults with and without type 1 diabetes: a cross-sectional study. JBMR Plus 2024; 8:ziad018. [PMID: 38505219 PMCID: PMC10945729 DOI: 10.1093/jbmrpl/ziad018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 11/18/2023] [Accepted: 12/12/2023] [Indexed: 03/21/2024] Open
Abstract
It is unclear if AGEs are involved in the bone fragility of type 1 diabetes (T1D). We evaluated whether skin AGEs by skin autofluorescence and serum AGEs (pentosidine, carboxymethyl-lysine [CML]) are independently associated with BMD by DXA (lumbar spine, hip, distal radius), trabecular bone score (TBS), serum bone turnover markers (BTMs: CTX; P1NP; osteocalcin), and sclerostin in participants with and without T1D. Linear regression models were used, with interaction terms to test effect modification by T1D status. In participants with T1D, correlations between skin and serum AGEs as well as between AGEs and 3-year HbA1C were evaluated using Spearman's correlations. Data are mean ± SD or median (interquartile range). We included individuals who participated in a cross-sectional study and had BMD and TBS assessment (106 T1D/65 controls, 53.2% women, age 43 ± 15 yr, BMI 26.6 ± 5.5 kg/m2). Participants with T1D had diabetes for 27.6 ± 12.3 yr, a mean 3-yr HbA1C of 7.5 ± 0.9% and skin AGEs of 2.15 ± 0.54 arbitrary units. A subgroup of 65 T1D/57 controls had BTMs and sclerostin measurements, and those with T1D also had serum pentosidine (16.8[8.2-32.0] ng/mL) and CML [48.0 ± 16.8] ng/mL) measured. Femoral neck BMD, TBS, and BTMs were lower, while sclerostin levels were similar in participants with T1D vs controls. T1D status did not modify the associations between AGEs and bone outcomes. Skin AGEs were significantly associated with total hip and femoral neck BMD, TBS, BTMs, and sclerostin before, but not after, adjustment for confounders. Serum AGEs were not associated with any bone outcome. There were no significant correlations between skin and serum AGEs or between AGEs and 3-yr HbA1C. In conclusion, skin and serum AGEs are not independently associated with BMD, TBS, BTMs, and sclerostin in participants with relatively well-controlled T1D and participants without diabetes.
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Affiliation(s)
- Julie-Catherine Coll
- Centre de recherche, CHU de Québec-Université Laval, Quebec City, QC G1V 4G2, Canada
| | | | - William D Leslie
- Department of Medicine, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Laëtitia Michou
- Centre de recherche, CHU de Québec-Université Laval, Quebec City, QC G1V 4G2, Canada
- Department of Medicine, Université Laval, Quebec City, QC G1V 0A6, Canada
| | - Stanley John Weisnagel
- Centre de recherche, CHU de Québec-Université Laval, Quebec City, QC G1V 4G2, Canada
- Department of Medicine, Université Laval, Quebec City, QC G1V 0A6, Canada
| | - Fabrice Mac-Way
- Centre de recherche, CHU de Québec-Université Laval, Quebec City, QC G1V 4G2, Canada
- Department of Medicine, Université Laval, Quebec City, QC G1V 0A6, Canada
| | - Caroline Albert
- Centre Hospitalier de l’Université de Montréal, Montreal, QC H2X 3E4, Canada
| | - Claudie Berger
- Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
| | - Suzanne N Morin
- Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
- Department of Medicine, McGill University, Montreal, QC H4A 3J1, Canada
| | - Rémi Rabasa-Lhoret
- Institut de recherches cliniques de Montréal, Montreal, QC H2W 1R7, Canada
| | - Claudia Gagnon
- Centre de recherche, CHU de Québec-Université Laval, Quebec City, QC G1V 4G2, Canada
- Department of Medicine, Université Laval, Quebec City, QC G1V 0A6, Canada
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Molvaer AK, Iversen MM, Igland J, Peyrot M, Tell GS, Holte KB, Monnier VM, Seljeflot I, Berg TJ. Metabolic predictors of pain, fatigue, depression and quality of life in people with long-term type 1 diabetes-the Dialong study. Diabet Med 2023; 40:e15009. [PMID: 36398424 PMCID: PMC10099863 DOI: 10.1111/dme.15009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 11/09/2022] [Indexed: 11/19/2022]
Abstract
AIM To examine associations of metabolic parameters (mean 30 years' time-weighted HbA1c and low-density lipoprotein-cholesterol [LDL-c], current methionine sulfoxide [MetSO], advanced glycation end products [AGEs], inflammatory markers and hypoglycaemia) with pain, fatigue, depression and quality of life (QoL) in people with long-term type 1 diabetes. METHODS A total of 104 persons with type 1 diabetes ≥45 years duration were included. Participants completed questionnaires measuring bodily pain (RAND-36 bodily pain domain with lower scores indicate higher levels of bodily pain), fatigue (Fatigue Questionnaire), depression (Patient Health Questionnaire), overall QoL (World Health Organization Quality of Life-BREF) and diabetes-related QoL (Audit of Diabetes-Dependent Quality of Life). In this observational study, mean time-weighted HbA1c and LDL-c were calculated based on longitudinal measures obtained from medical records of up to 34 years, while current HbA1c , LDL-c and inflammatory markers were analysed in blood samples and collagen MetSO and AGEs in skin biopsies. History of hypoglycaemia was self reported. Associations between metabolic parameters and questionnaire scores were analysed using linear regression analyses and are reported as standardized regression coefficients (beta). RESULTS Of the metabolic variables, higher mean time-weighted HbA1c was associated with higher levels of bodily pain and total fatigue (beta [p-value]) -0.3 (<0.001) and 0.2 (0.001). CONCLUSIONS Long-term chronic hyperglycaemia may have a negative influence on pain and fatigue in people with type 1 diabetes. These results may assist health care workers in emphasizing the importance of strict glycaemic control in people with diabetes and identifying and treating type 1 diabetes-related pain and fatigue.
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Affiliation(s)
- Anne Karin Molvaer
- Centre on Patient Reported Data, Haukeland University Hospital, Bergen, Norway
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Marjolein M Iversen
- Centre on Patient Reported Data, Haukeland University Hospital, Bergen, Norway
- Department of Health and Caring Sciences, Faculty of Health and Social Sciences, Bergen University College, Bergen, Norway
| | - Jannicke Igland
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Mark Peyrot
- Department of Health and Caring Sciences, Faculty of Health and Social Sciences, Bergen University College, Bergen, Norway
- Department of Sociology, Loyola University Maryland, Baltimore, Maryland, USA
| | - Grethe S Tell
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | | | - Vincent M Monnier
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Ingebjørg Seljeflot
- Center for Clinical Heart Research, Department of Cardiology, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Tore Julsrud Berg
- Department of Endocrinology, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
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Willett TL, Voziyan P, Nyman JS. Causative or associative: A critical review of the role of advanced glycation end-products in bone fragility. Bone 2022; 163:116485. [PMID: 35798196 PMCID: PMC10062699 DOI: 10.1016/j.bone.2022.116485] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 06/27/2022] [Accepted: 06/29/2022] [Indexed: 11/02/2022]
Abstract
The accumulation of advanced glycation end-products (AGEs) in the organic matrix of bone with aging and chronic disease such as diabetes is thought to increase fracture risk independently of bone mass. However, to date, there has not been a clinical trial to determine whether inhibiting the accumulation of AGEs is effective in preventing low-energy, fragility fractures. Moreover, unlike with cardiovascular or kidney disease, there are also no pre-clinical studies demonstrating that AGE inhibitors or breakers can prevent the age- or diabetes-related decrease in the ability of bone to resist fracture. In this review, we critically examine the case for a long-standing hypothesis that AGE accumulation in bone tissue degrades the toughening mechanisms by which bone resists fracture. Prior research into the role of AGEs in bone has primarily measured pentosidine, an AGE crosslink, or bulk fluorescence of hydrolysates of bone. While significant correlations exist between these measurements and mechanical properties of bone, multiple AGEs are both non-fluorescent and non-crosslinking. Since clinical studies are equivocal on whether circulating pentosidine is an indicator of elevated fracture risk, there needs to be a more complete understanding of the different types of AGEs including non-crosslinking adducts and multiple non-enzymatic crosslinks in bone extracellular matrix and their specific contributions to hindering fracture resistance (biophysical and biological). By doing so, effective strategies to target AGE accumulation in bone with minimal side effects could be investigated in pre-clinical and clinical studies that aim to prevent fragility fractures in conditions that bone mass is not the underlying culprit.
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Affiliation(s)
- Thomas L Willett
- Biomedical Engineering Program, Systems Design Engineering, University of Waterloo, Waterloo, Ontario, Canada.
| | - Paul Voziyan
- Department of Orthopaedic Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Jeffry S Nyman
- Department of Orthopaedic Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN 37212, USA.
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Monnier VM, Sell DR, Gao X, Genuth SM, Lachin JM, Bebu I. Plasma advanced glycation end products and the subsequent risk of microvascular complications in type 1 diabetes in the DCCT/EDIC. BMJ Open Diabetes Res Care 2022; 10:10/1/e002667. [PMID: 35058313 PMCID: PMC8783825 DOI: 10.1136/bmjdrc-2021-002667] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 12/01/2021] [Indexed: 12/21/2022] Open
Abstract
INTRODUCTION To assess impact of glycemic control on plasma protein-bound advanced glycation end products (pAGEs) and their association with subsequent microvascular disease. RESEARCH DESIGN AND METHODS Eleven pAGEs were measured by liquid chromatography-mass spectrometry in banked plasma from 466 participants in the Diabetes Control and Complications Trial/Epidemiology of Diabetes Interventions and Complications (DCCT/EDIC) study at three time points (TPs): DCCT year 4 (TP1) and year 8 (TP2) and EDIC year 5/6 (TP3). Correlation coefficients assessed cross-sectional associations, and Cox proportional hazards models assessed associations with subsequent risk of microvascular complications through EDIC year 24. RESULTS Glucose-derived glycation products fructose-lysine (FL), glucosepane (GSPN) and carboxymethyl-lysine (CML) decreased with intensive glycemic control at both TP1 and TP2 (p<0.0001) but were similar at TP3, and correlated with hemoglobin A1c (HbA1c). At TP1, the markers were associated with the subsequent risk of several microvascular outcomes. These associations did not remain significant after adjustment for HbA1c, except methionine sulfoxide (MetSOX), which remained associated with diabetic kidney disease. In unadjusted models using all 3 TPs, glucose-derived pAGEs were associated with subsequent risk of proliferative diabetic retinopathy (PDR, p<0.003), clinically significant macular edema (CSME, p<0.015) and confirmed clinical neuropathy (CCN, p<0.018, except CML, not significant (NS)). Adjusted for age, sex, body mass index, diabetes duration and mean updated HbA1c, the associations remained significant for PDR (FL: p<0.002, GSPN: p≤0.02, CML: p<0.003, pentosidine: p<0.02), CMSE (CML: p<0.03), albuminuria (FL: p<0.02, CML: p<0.03) and CCN (FL: p<0.005, GSPN : p<0.003). CONCLUSIONS pAGEs at TP1 are not superior to HbA1c for risk prediction, but glucose-derived pAGEs at three TPs and MetSOX remain robustly associated with progression of microvascular complications in type 1 diabetes even after adjustment for HbA1c and other factors.
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Affiliation(s)
- Vincent M Monnier
- Pathology and Biochemistry, Case Western Reserve University Department of Pathology, Cleveland, Ohio, USA
| | - David R Sell
- Pathology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Xiaoyu Gao
- The Biostatistics Center, The George Washington University, Rockville, Maryland, USA
| | - Saul M Genuth
- Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - John M Lachin
- The Biostatistics Center, The George Washington University, Rockville, Maryland, USA
| | - Ionut Bebu
- The Biostatistics Center, The George Washington University, Rockville, Maryland, USA
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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.
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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
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Tomaszewski EL, Orchard TJ, Hawkins MS, Conway RB, Buchanich JM, Maynard J, Songer T, Costacou T. Predictors of Change in Skin Intrinsic Fluorescence in Type 1 Diabetes: The Epidemiology of Diabetes Complications Study. J Diabetes Sci Technol 2021; 15:1368-1376. [PMID: 33993770 PMCID: PMC8655295 DOI: 10.1177/19322968211014337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
BACKGROUND Skin intrinsic fluorescent (SIF) scores are indirect measures of advanced glycation end-products (AGEs). SIF scores are cross-sectionally associated with type 1 diabetes (T1D) complications such as increased albumin excretion rate (AER), coronary artery calcification (CAC) and neuropathy. We assessed predictors of SIF score change in those with T1D. METHODS Data from the 30-year longitudinal Epidemiology of Diabetes Complications (EDC) study of childhood-onset T1D were used to assess AGEs measured with a SIF score produced by the SCOUT DS® device. SIF scores were assessed twice in 83 participants: between 2007-08 and again between 2010-14. Regression analyses were used to assess independent predictors of SIF score change. RESULTS At baseline, mean age was 47.9 ± 6.9 years, diabetes duration was 36.7 ± 6.4 years, and median glycosylated hemoglobin (HbA1c) was 7.1 (interquartile range: 6.5, 8.5). During a mean follow-up of 5.2 ± 0.9 years, mean change in SIF score was 2.9 ± 2.8 arbitrary units. In multivariable linear regression models, log HbA1c (P < 0.001), log estimated glomerular filtration rate (eGFR) (P < 0.001), overt nephropathy (defined as AER ≥ 200 µg/min, P = 0.06), and multiple daily insulin shots/pump use (MDI) exposure years (P = 0.02) were independent predictors of SIF score change. CONCLUSIONS Increases in SIF score over 5 years were related to increased glycemic levels and decreased kidney function (eGFR). MDI and glomerular damage were related to a decreased SIF score. This is one of the first studies with repeated SIF assessments in T1D and provides unique, albeit preliminary, insight about these associations.
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Affiliation(s)
- Erin L. Tomaszewski
- Graduate School of Public Health
Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Trevor J. Orchard
- Graduate School of Public Health
Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Marquis S. Hawkins
- Graduate School of Public Health
Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA
| | | | - Jeanine M. Buchanich
- Graduate School of Public Health
Department of Biostatistics, University of Pittsburgh, Pittsburgh, PA, USA
| | - John Maynard
- Medical Device and Diagnostics
Consultant, Atlanta, GA, USA
| | - Thomas Songer
- Graduate School of Public Health
Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Tina Costacou
- Graduate School of Public Health
Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA
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Chen JY, Yen GC, Tsai NT, Lin JA. Risk and Benefit of Natural and Commercial Dark Brown Sugars as Evidenced by Phenolic and Maillard Reaction Product Contents. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:767-775. [PMID: 33400521 DOI: 10.1021/acs.jafc.0c04795] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Products of dark brown sugar (DBS) from different production processes and raw materials may bring different risks and benefits to human health. Therefore, this study was aimed to evaluate the quality of natural and commercial DBS products. Results showed that physicochemical properties, including pH value, turbidity, and browning degree have no significant difference between natural and commercial DBS products. Total flavonoid content of natural DBS was found to be significantly higher than that of commercial DBS (p < 0.05). Notably, the levels of harmful Maillard reaction products in natural DBS were significantly lower than that in commercial DBS as evidenced by analyses of methylglyoxal and fluorescent advanced glycation end products (p < 0.05). However, the amount of acrylamide in natural DBS was significantly higher than that in commercial DBS. In conclusion, this study provides useful information for risk-benefit assessment of DBS products, which is helpful for food safety management.
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Affiliation(s)
- Jui-Yi Chen
- Graduate Institute of Food Safety, National Chung Hsing University, 145 Xingda Road, Taichung 40227, Taiwan
| | - Gow-Chin Yen
- Graduate Institute of Food Safety, National Chung Hsing University, 145 Xingda Road, Taichung 40227, Taiwan
- Department of Food Science and Biotechnology, National Chung Hsing University, 145 Xingda Road, Taichung 40227, Taiwan
| | - Nien-Ting Tsai
- Graduate Institute of Food Safety, National Chung Hsing University, 145 Xingda Road, Taichung 40227, Taiwan
| | - Jer-An Lin
- Graduate Institute of Food Safety, National Chung Hsing University, 145 Xingda Road, Taichung 40227, Taiwan
- Department of Food Science and Biotechnology, National Chung Hsing University, 145 Xingda Road, Taichung 40227, Taiwan
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8
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Zhang C, Svensson RB, Couppé C, Schjerling P, Skovgaard D, Kjaer M, Magnusson SP. Regional differences in turnover, composition, and mechanics of the porcine flexor tendon. Connect Tissue Res 2020; 61:475-484. [PMID: 31134816 DOI: 10.1080/03008207.2019.1620222] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE Recent data suggest that there is a lack of turnover in the core of human tendon, but it remains unknown whether there are regional differences between core and periphery of the cross section. The purpose of this project was to investigate regional differences in turnover as estimated by the accumulation of fluorescent Advanced Glycation End-products (AGEs) and regional differences in mechanical properties. MATERIALS AND METHODS Tendons were obtained from lean control (n = 4) and diabetic Göttingen minipigs (streptozotocin-induced, n = 6). The deep digital flexor tendon of one hind limb was separated into a proximal, central and distal part. Autofluorescence was measured in the core and periphery of the proximal and distal parts of the tendon, and mechanical properties were tested on fascicles taken from the core and periphery of the central tendon (only diabetic animals). RESULTS Autofluorescence was greater in the proximal than the distal part. In the distal part of the lean control animals, autofluorescent AGE accumulation was also greater in the core than the periphery. Peak modulus in the core region (704 ± 79 MPa) was higher than the periphery (466 ± 53 MPa, p < 0.05) in diabetic tendons. CONCLUSION Taken together, autofluorescence varied both along the length and across the tendon cross section, indicating higher turnover in the distal and peripheral regions. In addition, mechanical properties differed across the tendon cross-section.
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Affiliation(s)
- Cheng Zhang
- Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, University of Copenhagen , Copenhagen, Denmark
| | - Rene B Svensson
- Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, University of Copenhagen , Copenhagen, Denmark
| | - Christian Couppé
- Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, University of Copenhagen , Copenhagen, Denmark.,Department of Physical and Occupational Therapy, Bispebjerg Hospital , Copenhagen, Denmark
| | - Peter Schjerling
- Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, University of Copenhagen , Copenhagen, Denmark
| | - Dorthe Skovgaard
- Department of Clinical Physiology, Nuclear Medicine and PET, Rigshospitalet , Copenhagen, Denmark
| | - Michael Kjaer
- Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, University of Copenhagen , Copenhagen, Denmark
| | - S Peter Magnusson
- Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, University of Copenhagen , Copenhagen, Denmark.,Department of Physical and Occupational Therapy, Bispebjerg Hospital , Copenhagen, Denmark
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Fan X, Sell DR, Hao C, Liu S, Wang B, Wesson DW, Siedlak S, Zhu X, Kavanagh TJ, Harrison FE, Monnier VM. Vitamin C is a source of oxoaldehyde and glycative stress in age-related cataract and neurodegenerative diseases. Aging Cell 2020; 19:e13176. [PMID: 32567221 PMCID: PMC7418511 DOI: 10.1111/acel.13176] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 04/22/2020] [Accepted: 05/11/2020] [Indexed: 12/03/2022] Open
Abstract
Oxoaldehyde stress has recently emerged as a major source of tissue damage in aging and age-related diseases. The prevailing mechanism involves methylglyoxal production during glycolysis and modification of arginine residues through the formation of methylglyoxal hydroimidazolones (MG-H1). We now tested the hypothesis that oxidation of vitamin C (ascorbic acid or ASA) contributes to this damage when the homeostatic redox balance is disrupted especially in ASA-rich tissues such as the eye lens and brain. MG-H1 measured by liquid chromatography mass spectrometry is several fold increased in the lens and brain from transgenic mice expressing human vitamin C transporter 2 (hSVCT2). Similarly, MG-H1 levels are increased two- to fourfold in hippocampus extracts from individuals with Alzheimer's disease (AD), and significantly higher levels are present in sarkosyl-insoluble tissue fractions from AD brain proteins than in the soluble fractions. Moreover, immunostaining with antibodies against methylglyoxal hydroimidazolones reveals similar increase in substantia nigra neurons from individuals with Parkinson's disease. Results from an in vitro incubation experiment suggest that accumulated catalytic metal ions in the hippocampus during aging could readily accelerate ASA oxidation and such acceleration was significantly enhanced in AD. Modeling studies and intraventricular injection of 13 C-labeled ASA revealed that ASA backbone carbons 4-6 are incorporated into MG-H1 both in vitro and in vivo, likely via a glyceraldehyde precursor. We propose that drugs that prevent oxoaldehyde stress or excessive ASA oxidation may protect against age-related cataract and neurodegenerative diseases.
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Affiliation(s)
- Xingjun Fan
- Department of Cellular Biology and AnatomyMedical College of Georgia at Augusta UniversityAugustaGeorgia
- Department of PathologyCase Western Reserve UniversityClevelandOhioUSA
| | - David R. Sell
- Department of PathologyCase Western Reserve UniversityClevelandOhioUSA
| | - Caili Hao
- Department of Cellular Biology and AnatomyMedical College of Georgia at Augusta UniversityAugustaGeorgia
| | | | - Benlian Wang
- Center for ProteomicsCase Western Reserve UniversityClevelandOhioUSA
| | - Daniel W. Wesson
- NeurosciencesCase Western Reserve UniversityClevelandOhioUSA
- Present address:
Department of Pharmacology & TherapeuticsUniversity of FloridaGainesvilleFloridaUSA
| | - Sandra Siedlak
- Department of PathologyCase Western Reserve UniversityClevelandOhioUSA
| | - Xiongwei Zhu
- Department of PathologyCase Western Reserve UniversityClevelandOhioUSA
| | - Terrance J. Kavanagh
- Department of Environmental and Occupational Health SciencesUniversity of WashingtonSeattleWashingtonUSA
| | - Fiona E. Harrison
- Department of MedicineVanderbilt University Medical CenterNashvilleTennesseeUSA
| | - Vincent M. Monnier
- Department of PathologyCase Western Reserve UniversityClevelandOhioUSA
- BiochemistryCase Western Reserve UniversityClevelandOhioUSA
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Holte KB, Svanteson M, Hanssen KF, Sveen KA, Seljeflot I, Solheim S, Sell DR, Monnier VM, Berg TJ. Collagen methionine sulfoxide and glucuronidine/LW-1 are markers of coronary artery disease in long-term survivors with type 1 diabetes. The Dialong study. PLoS One 2020; 15:e0233174. [PMID: 32401813 PMCID: PMC7219747 DOI: 10.1371/journal.pone.0233174] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 04/29/2020] [Indexed: 01/07/2023] Open
Abstract
Objectives Type 1 diabetes is a risk factor for coronary heart disease. The underlying mechanism behind the accelerated atherosclerosis formation is not fully understood but may be related to the formation of oxidation products and advanced glycation end-products (AGEs). We aimed to examine the associations between the collagen oxidation product methionine sulfoxide; the collagen AGEs methylglyoxal hydroimidazolone (MG-H1), glucosepane, pentosidine, glucuronidine/LW-1; and serum receptors for AGE (RAGE) with measures of coronary artery disease in patients with long-term type 1 diabetes. Methods In this cross-sectional study, 99 participants with type 1 diabetes of ≥ 45-year duration and 63 controls without diabetes had either established coronary heart disease (CHD) or underwent Computed Tomography Coronary Angiography (CTCA) measuring total, calcified and soft/mixed plaque volume. Skin collagen methionine sulfoxide and AGEs were measured by liquid chromatography-mass spectrometry and serum sRAGE/esRAGE by ELISA. Results In the diabetes group, low levels of methionine sulfoxide (adjusted for age, sex and mean HbA1c) were associated with normal coronary arteries, OR 0.48 (95% CI 0.27–0.88). Glucuronidine/LW-1 was associated with established CHD, OR 2.0 (1.16–3.49). MG-H1 and glucuronidine/LW-1 correlated with calcified plaque volume (r = 0.23–0.28, p<0.05), while pentosidine correlated with soft/mixed plaque volume (r = 0.29, p = 0.008), also in the adjusted analysis. Conclusions Low levels of collagen-bound methionine sulfoxide were associated with normal coronary arteries while glucuronidine/LW-1 was positively associated with established CHD in long-term type 1 diabetes, suggesting a role for metabolic and oxidative stress in the formation of atherosclerosis in diabetes.
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Affiliation(s)
- Kristine B. Holte
- Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- * E-mail:
| | - Mona Svanteson
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway
| | - Kristian F. Hanssen
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- The Norwegian Diabetics’ Center, Oslo, Norway
| | - Kari Anne Sveen
- Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Ingebjørg Seljeflot
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- Center for Clinical Heart Research, Department of Cardiology, Oslo University Hospital, Oslo, Norway
| | - Svein Solheim
- Center for Clinical Heart Research, Department of Cardiology, Oslo University Hospital, Oslo, Norway
| | - David R. Sell
- Department of Pathology and Biochemistry, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
| | - Vincent M. Monnier
- Department of Pathology and Biochemistry, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
| | - Tore Julsrud Berg
- Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
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11
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Sergi D, Boulestin H, Campbell FM, Williams LM. The Role of Dietary Advanced Glycation End Products in Metabolic Dysfunction. Mol Nutr Food Res 2020; 65:e1900934. [PMID: 32246887 DOI: 10.1002/mnfr.201900934] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 03/09/2020] [Indexed: 12/13/2022]
Abstract
Advanced glycation end products (AGEs) are a heterogeneous group of molecules produced, non-enzymatically, from the interaction between reducing sugars and the free amino groups of proteins, nucleic acids, and lipids. AGEs are formed as a normal consequence of metabolism but can also be absorbed from the diet. They have been widely implicated in the complications of diabetes affecting cardiovascular health, the nervous system, eyes, and kidneys. Increased levels of AGEs are also detrimental to metabolic health and may contribute to the metabolic abnormalities induced by the Western diet, which is high in processed foods and represents a significant source of AGEs. While increased AGE levels are a consequence of diabetic hyperglycaemia, AGEs themselves activate signaling pathways, which compromise insulin signaling and pancreatic β-cell function, thus, contributing to the development of type 2 diabetes mellitus (T2DM). Furthermore, AGEs may also contribute to the obesogenic effects of the Western diet by promoting hypothalamic inflammation and disrupting the central control of energy balance. Here, the role of dietary AGEs in metabolic dysfunction is reviewed with a focus on the mechanisms underpinning their detrimental role in insulin resistance, pancreatic β-cell dysfunction, hypothalamic control of energy balance, and the pathogenesis of T2DM and obesity.
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Affiliation(s)
- Domenico Sergi
- Nutrition and Health Substantiation Group, Nutrition and Health Program, Health and Biosecurity, Commonwealth Scientific and Industrial Research Organisation (CSIRO), Adelaide, SA, 5000, Australia.,Adelaide Medical School, The University of Adelaide, Adelaide, SA, 5000, Australia
| | - Hakim Boulestin
- Rowett Institute, University of Aberdeen, Aberdeen, AB25 2ZD, UK
| | - Fiona M Campbell
- Rowett Institute, University of Aberdeen, Aberdeen, AB25 2ZD, UK
| | - Lynda M Williams
- Rowett Institute, University of Aberdeen, Aberdeen, AB25 2ZD, UK
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12
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Comparative study of different glycating agents on human plasma and vascular cells. Mol Biol Rep 2019; 47:521-531. [DOI: 10.1007/s11033-019-05158-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 10/23/2019] [Indexed: 12/15/2022]
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13
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Sotokawauchi A, Matsui T, Higashimoto Y, Yamagishi SI. Fructose causes endothelial cell damage via activation of advanced glycation end products-receptor system. Diab Vasc Dis Res 2019; 16:556-561. [PMID: 31375034 DOI: 10.1177/1479164119866390] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVE Advanced glycation end products and their receptor - RAGE - in the adipose tissues contribute to metabolic derangements in fructose-fed rats. However, it remains unclear whether fructose could cause endothelial cell damage via the activation of AGE-RAGE. METHODS Intracellular advanced glycation end products were evaluated by dot blot analysis. Fructose-derived advanced glycation end products (Fruc-AGEs) were prepared by incubating bovine serum albumin with fructose for 8 weeks. Reactive oxygen species generation was measured using a fluorescent probe. Vascular cell adhesion molecule-1 gene expression was analysed by reverse transcription-polymerase chain reaction. Binding affinities of Fruc-AGEs to DNA-aptamer raised against Fruc-AGEs (Fruc-AGE-aptamer) or RAGE were measured with a quartz crystal microbalance. RESULTS Fructose increased the advanced glycation end product-specific fluorescence intensity in assay medium, while it stimulated intracellular formation of advanced glycation end products in human umbilical vein endothelial cells. Furthermore, 0.3 mM fructose for 4 days significantly increased reactive oxygen species generation and vascular cell adhesion molecule-1 gene expression in human umbilical vein endothelial cells. Fruc-AGE-aptamer, but not Control-aptamer, bound to Fruc-AGEs with Kd value of 5.60 × 10-6 M and dose-dependently inhibited the binding of Fruc-AGEs to RAGE. Moreover, Fruc-AGE-aptamer prevented the Fruc-AGE- and fructose-induced reactive oxygen species generation and vascular cell adhesion molecule-1 gene expression in human umbilical vein endothelial cells. CONCLUSION This study suggests that fructose may elicit endothelial cell damage partly via the activation of AGE-RAGE axis.
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Affiliation(s)
- Ami Sotokawauchi
- 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
| | | | - Sho-Ichi Yamagishi
- Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
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14
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Long-Term Local Injection of RAGE-Aptamer Suppresses the Growth of Malignant Melanoma in Nude Mice. JOURNAL OF ONCOLOGY 2019; 2019:7387601. [PMID: 31565056 PMCID: PMC6746150 DOI: 10.1155/2019/7387601] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 05/12/2019] [Accepted: 08/08/2019] [Indexed: 02/06/2023]
Abstract
Accumulating evidence has suggested the pathological role of advanced glycation end products (AGEs) and their receptor RAGE axis in aging-associated disorders, including cancers. In this study, we examined the effects of local injection of RAGE-aptamer adjacent to the tumor on G361 melanoma growth in nude mice. We further investigated the effects of RAGE-aptamer on oxidative stress generation, RAGE, vascular endothelial growth factor (VEGF), and monocyte chemoattractant protein-1 (MCP-1) gene expression in Nε-(carboxymethyl)lysine (CML)-exposed G361 melanoma cells in vitro. Local injection of RAGE-aptamer adjacent to the tumor dramatically decreased the growth of G361 melanoma in nude mice, which was associated with reduced expression of CML, RAGE, nitrotyrosine, VEGF, CD31, and von Willebrand factor, markers of endothelial cells in G361 tumors. Furthermore, RAGE-aptamer inhibited the binding of CML to V-domain of RAGE and blocked the CML-induced increases in oxidative stress generation, RAGE, VEGF, and MCP-1 mRNA levels in G361 melanoma cells. Our present findings suggest that long-term local injection of RAGE-aptamer adjacent to the tumor could inhibit melanoma growth in nude mice partly by suppressing tumor angiogenesis via blockade of the CML-RAGE interaction. Local injection of RAGE-aptamer may be a feasible therapeutic tool for the treatment of malignant melanoma.
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15
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Nash A, Notou M, Lopez-Clavijo AF, Bozec L, de Leeuw NH, Birch HL. Glucosepane is associated with changes to structural and physical properties of collagen fibrils. Matrix Biol Plus 2019; 4:100013. [PMID: 33543010 PMCID: PMC7852203 DOI: 10.1016/j.mbplus.2019.100013] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 08/22/2019] [Accepted: 08/23/2019] [Indexed: 11/28/2022] Open
Abstract
Collagen glycation, and in particular the formation of advanced glycation end-product (AGE) crosslinks, plays a central role in the ageing process and in many of the long-term complications of diabetes. Glucosepane, the most abundant and relevant AGE crosslink, has been suggested to increase the stiffness of tissue and reduce its solubility, although no evidence is available concerning the mechanisms. We have used a combination of computational and experimental techniques to study a collagen-rich tissue with a relatively simple organisation to further our understanding of the impact of glucosepane on the structural and physical properties of collagen fibrils. Our work shows that glucosepane levels increase dramatically in aged tendon tissue and are associated with the reduced density of collagen packing and increased porosity to water molecules. Our studies provide the basis to understand many of the tissue dysfunctions associated with ageing and diabetes across a range of different tissues types. Levels of the advanced glycation end-product glucosepane increase in human tendon with increasing chronological age. Glucosepane results in a less tightly held helical structure in the collagen molecule and increased porosity to water. Water content is higher in Achilles and anterior tibialis tendon tissue from older individuals compared to young people. The denaturation temperature of collagen increases in the older age group suggesting a more highly cross-linked structure. The enthalpy of collagen denaturation decreases in older donors suggesting molecules are less confined within the fibril.
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Affiliation(s)
- Anthony Nash
- University College London, Institute of Orthopaedics and Musculoskeletal Science, Stanmore Campus, Royal National Orthopaedic Hospital, Stanmore HA7 4LP, UK
| | - Maria Notou
- University College London, Institute of Orthopaedics and Musculoskeletal Science, Stanmore Campus, Royal National Orthopaedic Hospital, Stanmore HA7 4LP, UK
| | - Andrea F Lopez-Clavijo
- University College London, Institute of Orthopaedics and Musculoskeletal Science, Stanmore Campus, Royal National Orthopaedic Hospital, Stanmore HA7 4LP, UK
| | - Laurent Bozec
- University College London, Institute of Orthopaedics and Musculoskeletal Science, Stanmore Campus, Royal National Orthopaedic Hospital, Stanmore HA7 4LP, UK
| | - Nora H de Leeuw
- University College London, Institute of Orthopaedics and Musculoskeletal Science, Stanmore Campus, Royal National Orthopaedic Hospital, Stanmore HA7 4LP, UK
| | - Helen L Birch
- University College London, Institute of Orthopaedics and Musculoskeletal Science, Stanmore Campus, Royal National Orthopaedic Hospital, Stanmore HA7 4LP, UK
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17
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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.
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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
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18
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Innovative approaches in diabetes diagnosis and monitoring: less invasive, less expensive… but less, equally or more efficient? Clin Chem Lab Med 2018; 56:1397-1399. [DOI: 10.1515/cclm-2018-0549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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19
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Aqueous Extract of Glucoraphanin-Rich Broccoli Sprouts Inhibits Formation of Advanced Glycation End Products and Attenuates Inflammatory Reactions in Endothelial Cells. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:9823141. [PMID: 30174716 PMCID: PMC6106845 DOI: 10.1155/2018/9823141] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 07/27/2018] [Accepted: 08/01/2018] [Indexed: 11/21/2022]
Abstract
We have previously shown that sulforaphane not only inhibits formation of advanced glycation end products (AGEs) but also exerts anti-inflammatory effects on AGE-exposed human umbilical vein endothelial cells (HUVECs) and AGE-injected rat aortae. Here we examined the effects of aqueous extract of glucoraphanin-rich broccoli sprouts on formation of AGEs and then investigated whether the extract could attenuate inflammatory or oxidative stress reactions in tumor necrosis factor-alpha (TNF-α)- or AGE-exposed HUVECs. Fresh broccoli sprouts were homogenized in phosphate-buffered saline and filtered through a gauze. After centrifugation, clear extract was obtained. AGE formation was measured by enzyme-linked immunosorbent assay. Gene expression was evaluated by real-time reverse transcription-polymerase chain reaction. Reactive oxygen species (ROS) generation were measured using a fluorescent dye. Five percent broccoli sprout extract inhibited the formation of AGEs, reduced basal gene expressions of monocyte chemoattractant protein-1 (MCP-1), intercellular adhesion molecule-1 (ICAM-1,) and receptor for AGEs (RAGE), and upregulated endothelial nitric oxide synthase (eNOS) mRNA levels in HUVECs. TNF-α upregulated MCP-1, ICAM-1, and RAGE mRNA levels in HUVECs, all of which were attenuated by the treatment with 1% broccoli sprout extract. Pretreatment of 1% broccoli sprout extract prevented the ROS generation in HUVECs evoked by AGEs. The present study demonstrates that sulforaphane-rich broccoli sprout extract could inhibit the AGE-RAGE axis and exhibit anti-inflammatory actions in HUVECs. Supplementation of sulforaphane-rich broccoli sprout extract may play a protective role against vascular injury.
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20
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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.
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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
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21
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Svensson RB, Smith ST, Moyer PJ, Magnusson SP. Effects of maturation and advanced glycation on tensile mechanics of collagen fibrils from rat tail and Achilles tendons. Acta Biomater 2018; 70:270-280. [PMID: 29447959 DOI: 10.1016/j.actbio.2018.02.005] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 01/24/2018] [Accepted: 02/06/2018] [Indexed: 02/06/2023]
Abstract
Connective tissues are ubiquitous throughout the body and consequently affect the function of many organs. In load bearing connective tissues like tendon, the mechanical functionality is provided almost exclusively by collagen fibrils that in turn are stabilized by covalent cross-links. Functionally distinct tendons display different cross-link patterns, which also change with maturation, but these differences have not been studied in detail at the fibril level. In the present study, a custom built nanomechanical test platform was designed and fabricated to measure tensile mechanics of individual fibrils from rat tendons. The influence of animal maturity (4 vs. 16 week old rats) and functionally different tendons (tail vs. Achilles tendons) were examined. Additionally the effect of methylglyoxal (MG) treatment in vitro to form advanced glycation end products (AGEs) was investigated. Age and tissue type had no significant effect on fibril mechanics, but MG treatment increased strength and stiffness without inducing brittleness and gave rise to a distinct three-phase mechanical response corroborating that previously reported in human patellar tendon fibrils. That age and tissue had little mechanical effect, tentatively suggest that variations in enzymatic cross-links may play a minor role after initial tissue formation. STATEMENT OF SIGNIFICANCE Tendons are connective tissues that connect muscle to bone and carry some of the greatest mechanical loads in the body, which makes them common sites of injury. A tendon is essentially a biological rope formed by thin strands called fibrils made of the protein collagen. Tendon function relies on the strength of these fibrils, which in turn depends on naturally occurring cross-links between collagen molecules, but the mechanical influence of these cross-links have not been measured before. It is believed that beneficial cross-linking occurs with maturation while additional cross-linking with aging may lead to brittleness, but this study provides evidence that maturation has little effect on mechanical function and that age-related cross-linking does not result in brittle collagen fibrils.
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Affiliation(s)
- Rene B Svensson
- Institute of Sports Medicine Copenhagen, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Stuart T Smith
- Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, NC, USA
| | - Patrick J Moyer
- Department of Physics and Optical Science, University of North Carolina at Charlotte, Charlotte, NC, USA
| | - S Peter Magnusson
- Institute of Sports Medicine Copenhagen, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; Musculoskeletal Rehabilitation Research Unit, Bispebjerg Hospital, University Hospital of Copenhagen, Copenhagen, Denmark
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Abstract
The extracellular matrix (ECM) provides the environment for many cells types within the body and, in addition to the well recognised role as a structural support, influences many important cell process within the body. As a result, age-related changes to the proteins of the ECM have far reaching consequences with the potential to disrupt many different aspects of homeostasis and healthy function. The proteins collagen and elastin are the most abundant in the ECM and their ability to function as a structural support and provide mechanical stability results from the formation of supra-molecular structures. Collagen and elastin have a long half-life, as required by their structural role, which leaves them vulnerable to a range of post-translational modifications. In this chapter the role of the ECM is discussed and the component proteins introduced. Major age-related modifications including glycation, carbamylation and fragmentation and the impact these have on ECM function are reviewed.
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Holte KB, Juel NG, Brox JI, Hanssen KF, Fosmark DS, Sell DR, Monnier VM, Berg TJ. Hand, shoulder and back stiffness in long-term type 1 diabetes; cross-sectional association with skin collagen advanced glycation end-products. The Dialong study. J Diabetes Complications 2017; 31:1408-1414. [PMID: 28705609 DOI: 10.1016/j.jdiacomp.2017.06.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/30/2017] [Accepted: 06/15/2017] [Indexed: 12/11/2022]
Abstract
AIMS We aimed to: (i) estimate the prevalence of Dupuytren's disease, trigger finger, carpal tunnel syndrome and frozen shoulder; (ii) assess stiffness of the hand, shoulder and back; and (iii) explore the association of joint stiffness with both long-term HbA1c and collagen advanced glycation end-products (AGEs) in long-term type 1 diabetes mellitus (T1DM). METHODS Patients with T1DM from 1970 or earlier attending a specialized diabetes center were included in this cross-sectional controlled study. We collected HbA1/HbA1c measurements from 1980 to 2015 and data on hand and shoulder diagnoses and joint stiffness through interviews, charts, and standardized examination. Skin biopsies were analyzed for collagen AGEs by liquid chromatography-mass spectrometry. RESULTS Lifetime prevalence of hand and shoulder diagnoses in the diabetes group (n=102) ranged from 37%-76% (frozen shoulder) versus 11%-15% in controls (n=73) (p<0.001). There was an association between joint stiffness and long-term HbA1c (odds ratio 2.01 [95% CI 1.10-3.7]) and the AGEs methyl-glyoxal-lysine-dimer (odds ratio 1.68 [95% CI 1.03-2.73]) and pentosidine (odds ratio 1.81 [95% CI 1.04-3.16]). CONCLUSIONS Patients with T1DM >45years had a very high prevalence of hand and shoulder diagnoses versus controls. Joint stiffness was associated with collagen AGEs. However, joint biopsies and prospective studies must explore this association further.
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Affiliation(s)
- Kristine Bech Holte
- Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, Post Box 4956, Nydalen, 0424 Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Postboks 1078, Blindern, 0316 Oslo, Norway.
| | - Niels Gunnar Juel
- Department of Physical Medicine and Rehabilitation, Oslo University Hospital, Post Box 4956, Nydalen, 0424 Oslo, Norway
| | - Jens Ivar Brox
- Department of Physical Medicine and Rehabilitation, Oslo University Hospital, Post Box 4956, Nydalen, 0424 Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Postboks 1078, Blindern, 0316 Oslo, Norway
| | - Kristian Folkvord Hanssen
- The Norwegian Diabetics' Center, Sponhoggveien 19, 0284 Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Postboks 1078, Blindern, 0316 Oslo, Norway
| | - Dag Sigurd Fosmark
- Department of Ophthalmology, Oslo University Hospital, Post Box 4956, Nydalen, 0424 Oslo, Norway
| | - David R Sell
- Department of Pathology, Case Western Reserve University School of Medicine, 2109 Adelbert Rd, Cleveland, OH 44106, USA
| | - Vincent M Monnier
- Department of Pathology, Case Western Reserve University School of Medicine, 2109 Adelbert Rd, Cleveland, OH 44106, USA
| | - Tore Julsrud Berg
- Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, Post Box 4956, Nydalen, 0424 Oslo, Norway; The Norwegian Diabetics' Center, Sponhoggveien 19, 0284 Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Postboks 1078, Blindern, 0316 Oslo, Norway
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Dicarbonyls and Advanced Glycation End-Products in the Development of Diabetic Complications and Targets for Intervention. Int J Mol Sci 2017; 18:ijms18050984. [PMID: 28475116 PMCID: PMC5454897 DOI: 10.3390/ijms18050984] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 04/11/2017] [Accepted: 05/02/2017] [Indexed: 01/17/2023] Open
Abstract
Advanced glycation end-products (AGEs) are non-enzymatic protein and amino acid adducts as well as DNA adducts which form from dicarbonyls and glucose. AGE formation is enhanced in diabetes and is associated with the development of diabetic complications. In the current review, we discuss mechanisms that lead to enhanced AGE levels in the context of diabetes and diabetic complications. The methylglyoxal-detoxifying glyoxalase system as well as alternative pathways of AGE detoxification are summarized. Therapeutic approaches to interfere with different pathways of AGE formation are presented.
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