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Hu W, Zheng R, Feng Y, Tan D, Chan Chung-Tsing G, Su X, Kim JE. Impacts of regular consumption of grapes on macular pigment accumulation in Singapore older adults: a randomized controlled trial. Food Funct 2023; 14:8321-8330. [PMID: 37605542 DOI: 10.1039/d3fo02105j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Background: Oxidative stress is a key risk factor for visual impairment and consuming dietary antioxidant-rich foods may help in managing visual impairments. However, a limited number of studies have investigated the effect of dietary antioxidant-rich food including grapes on eye health in older adults. Objectives: To assess the effects on macular pigment accumulation of regular consumption of grapes in Singapore older adults. Methods: This was a 16 week, double-blind, randomized, placebo-controlled trial. Thirty-four Singapore older adults were randomized into regularly consuming either 46 g day-1 of freeze-dried table grape powder (the intervention group) or the same amount of placebo powder (the control group). Macular pigment optical density (MPOD), skin carotenoid status, advanced glycation end product (AGEs) status and dietary lutein intake were assessed every 4 weeks, and plasma lutein concentration, total antioxidant capacity and total phenolic content were measured every 8 weeks. Results: A significant time effect (p = 0.007) was observed for MPOD, and this is largely attributed to the improvement in the MPOD for the intervention group, as a significant increase was observed only in this group (week 0: 0.56 ± 0.04 D.U.; week 16: 0.61 ± 0.04 D.U., p < 0.01). Additionally, a significant increase in plasma total antioxidant capacity (week 0: 0.26 ± 0.13 mM TEAC; week 16: 0.36 ± 0.20 mM TEAC, p < 0.01) and total phenolic content (week 0: 10.50 ± 0.44 mg L-1 GAE; week 16: 12.58 ± 0.55 mg L-1 GAE, p < 0.001) was observed for the intervention group only. In contrast, a significant increase in skin AGE status was observed in the control group (week 0: 2.47 ± 0.24; week 16: 2.99 ± 0.12, p < 0.05) while this was mitigated in the intervention group. There were no differences in dietary lutein intake, plasma lutein concentration and skin carotenoid status between groups throughout the study. Conclusions: Regular intake of grapes may improve eye health in Singapore older adults, specifically in augmenting MPOD, which can be explained by an increase in plasma total antioxidant capacity and phenolic content, and the downregulation of AGEs. This study was registered at clinicatrials.gov as NCT05064865.
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Affiliation(s)
- Weili Hu
- Department of Food Science and Technology, National University of Singapore, Singapore 117543, Singapore.
| | - Ruoxi Zheng
- Department of Food Science and Technology, National University of Singapore, Singapore 117543, Singapore.
| | - Yuting Feng
- Department of Food Science and Technology, National University of Singapore, Singapore 117543, Singapore.
| | - Denise Tan
- Department of Food Science and Technology, National University of Singapore, Singapore 117543, Singapore.
- Science and Technology Department, Nestlé R&D Center (Pte) Ltd, Singapore 618802, Singapore
| | - Gregory Chan Chung-Tsing
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore 117549, Singapore
| | - Xinyi Su
- Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119074, Singapore
| | - Jung Eun Kim
- Department of Food Science and Technology, National University of Singapore, Singapore 117543, Singapore.
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2
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Reynaert NL, Vanfleteren LEGW, Perkins TN. The AGE-RAGE Axis and the Pathophysiology of Multimorbidity in COPD. J Clin Med 2023; 12:jcm12103366. [PMID: 37240472 DOI: 10.3390/jcm12103366] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 04/24/2023] [Accepted: 05/05/2023] [Indexed: 05/28/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a disease of the airways and lungs due to an enhanced inflammatory response, commonly caused by cigarette smoking. Patients with COPD are often multimorbid, as they commonly suffer from multiple chronic (inflammatory) conditions. This intensifies the burden of individual diseases, negatively affects quality of life, and complicates disease management. COPD and comorbidities share genetic and lifestyle-related risk factors and pathobiological mechanisms, including chronic inflammation and oxidative stress. The receptor for advanced glycation end products (RAGE) is an important driver of chronic inflammation. Advanced glycation end products (AGEs) are RAGE ligands that accumulate due to aging, inflammation, oxidative stress, and carbohydrate metabolism. AGEs cause further inflammation and oxidative stress through RAGE, but also through RAGE-independent mechanisms. This review describes the complexity of RAGE signaling and the causes of AGE accumulation, followed by a comprehensive overview of alterations reported on AGEs and RAGE in COPD and in important co-morbidities. Furthermore, it describes the mechanisms by which AGEs and RAGE contribute to the pathophysiology of individual disease conditions and how they execute crosstalk between organ systems. A section on therapeutic strategies that target AGEs and RAGE and could alleviate patients from multimorbid conditions using single therapeutics concludes this review.
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Affiliation(s)
- Niki L Reynaert
- Department of Respiratory Medicine, School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, 6229 ER Maastricht, The Netherlands
| | - Lowie E G W Vanfleteren
- COPD Center, Department of Respiratory Medicine and Allergology, Sahlgrenska University Hospital, 413 45 Gothenburg, Sweden
- Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Timothy N Perkins
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
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3
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Shang M, Zhang Y, Zhang T. IFI44L and C1QTNF5 as promising biomarkers of proliferative diabetic retinopathy. Medicine (Baltimore) 2022; 101:e31961. [PMID: 36451477 PMCID: PMC9704899 DOI: 10.1097/md.0000000000031961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Proliferative diabetic retinopathy (PDR) is a world-wide leading cause of blindness among adults and may be associated with the influence of genetic factors. It is significant to search for genetic biomarkers of PDR. In our study, we collected genomic data about PDR from gene expression omnibus (GEO) database. Differentially expressed gene (DEG) analysis and weighted gene co-expression network analysis (WGCNA) were carried out. The gene module with the highest gene significance (GS) was defined as the key module. Hub genes were identified by Venn diagram. Then we verified the expression of hub genes in validation data sets and built a diagnostic model by least absolute shrinkage and selection operator (LASSO) regression. Enrichment analysis, including gene ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), gene set enrichment analysis (GSEA) and construction of a protein-protein interaction (PPI) network were conducted. In GSE60436, we identified 466 DEGs. WGCNA established 14 gene modules, and the blue module (GS = 0.64), was the key module. Interferon (IFN)-induced protein 44-like (IFI44L) and complement C1q tumor necrosis factor-related protein 5 (C1QTNF5) were identified as hub genes. The expression of hub genes in GEO datasets was verified and a diagnostic model was constructed by LASSO as follows: index = IFI44L * 0.0432 + C1QTNF5 * 0.11246. IFI44L and C1QTNF5 might affect the disease progression of PDR by regulating metabolism-related and inflammatory pathways. IFI44L and C1QTNF5 may play important roles in the disease process of PDR, and a LASSO regression model suggested that the 2 genes could serve as promising biomarkers of PDR.
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Affiliation(s)
- Mingxin Shang
- He Eye Specialist Hospital, Shenyang, Liaoning Province, China
| | - Yao Zhang
- He Eye Specialist Hospital, Shenyang, Liaoning Province, China
| | - Tongtong Zhang
- He Eye Specialist Hospital, Shenyang, Liaoning Province, China
- * Correspondence: Tongtong Zhang, He Eye Specialist Hospital, No.128 North Huanghe Street, Shenyang, Liaoning Province 110034, China (e-mail: )
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4
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Sakly R, Wolffenbuttel BHR, Khochtali I, Bouida W, Boubaker H, Nouira S, Abid S, Kerkeni M. Increased skin autofluorescence of advanced glycation end products (AGEs) in subjects with cardiovascular risk factors. Int J Diabetes Dev Ctries 2022. [DOI: 10.1007/s13410-022-01121-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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5
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Frudd K, Sivaprasad S, Raman R, Krishnakumar S, Revathy YR, Turowski P. Diagnostic circulating biomarkers to detect vision-threatening diabetic retinopathy: Potential screening tool of the future? Acta Ophthalmol 2022; 100:e648-e668. [PMID: 34269526 DOI: 10.1111/aos.14954] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 06/02/2021] [Accepted: 06/17/2021] [Indexed: 12/12/2022]
Abstract
With the increasing prevalence of diabetes in developing and developed countries, the socio-economic burden of diabetic retinopathy (DR), the leading complication of diabetes, is growing. Diabetic retinopathy (DR) is currently one of the leading causes of blindness in working-age adults worldwide. Robust methodologies exist to detect and monitor DR; however, these rely on specialist imaging techniques and qualified practitioners. This makes detecting and monitoring DR expensive and time-consuming, which is particularly problematic in developing countries where many patients will be remote and have little contact with specialist medical centres. Diabetic retinopathy (DR) is largely asymptomatic until late in the pathology. Therefore, early identification and stratification of vision-threatening DR (VTDR) is highly desirable and will ameliorate the global impact of this disease. A simple, reliable and more cost-effective test would greatly assist in decreasing the burden of DR around the world. Here, we evaluate and review data on circulating protein biomarkers, which have been verified in the context of DR. We also discuss the challenges and developments necessary to translate these promising data into clinically useful assays, to detect VTDR, and their potential integration into simple point-of-care testing devices.
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Affiliation(s)
- Karen Frudd
- Institute of Ophthalmology University College London London UK
| | - Sobha Sivaprasad
- Institute of Ophthalmology University College London London UK
- NIHR Moorfields Biomedical Research Centre Moorfields Eye Hospital London UK
| | - Rajiv Raman
- Vision Research Foundation Sankara Nethralaya Chennai Tamil Nadu India
| | | | | | - Patric Turowski
- Institute of Ophthalmology University College London London UK
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Mukunda DC, Joshi VK, Chandra S, Siddaramaiah M, Rodrigues J, Gadag S, Nayak UY, Mazumder N, Satyamoorthy K, Mahato KK. Probing nonenzymatic glycation of proteins by deep ultraviolet light emitting diode induced autofluorescence. Int J Biol Macromol 2022; 213:279-296. [DOI: 10.1016/j.ijbiomac.2022.05.151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 03/25/2022] [Accepted: 05/22/2022] [Indexed: 01/03/2023]
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7
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Mouanness M, Merhi Z. Impact of Dietary Advanced Glycation End Products on Female Reproduction: Review of Potential Mechanistic Pathways. Nutrients 2022; 14:nu14050966. [PMID: 35267940 PMCID: PMC8912317 DOI: 10.3390/nu14050966] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/20/2022] [Accepted: 02/22/2022] [Indexed: 02/04/2023] Open
Abstract
Advanced glycation end products (AGEs), a heterogenous group of products formed by the reaction between protein and reducing sugars, can form endogenously due to non-enzymatic reactions or by exogenous sources such as diet where considerable increase in AGEs is observed due to the modification of food mainly by thermal processing. Recent studies have suggested that AGEs could impact, via inducing inflammation and oxidative stress, the reproductive health and fertility in both males and females. This review presents a summary of recently published data pertaining to the pathogenesis of dietary AGEs and their receptors as well as their potential impact on female reproductive health. More specifically, it will present data pertaining to dietary AGEs’ involvement in the mechanistic pathogenesis of polycystic ovary syndrome, ovarian dysfunction, as well as the AGEs’ effect perinatally on the female offspring reproduction. Understanding the mechanistic impact of dietary AGEs on female reproduction can help contribute to the development of targeted pharmacological therapies that will help curb rising female infertility.
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Affiliation(s)
- Marco Mouanness
- Rejuvenating Fertility Center, 315 W 57th Street, Suite 208, New York, NY 10019, USA;
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Maimonides Medical Center, Brooklyn, NY 11219, USA
| | - Zaher Merhi
- Rejuvenating Fertility Center, 315 W 57th Street, Suite 208, New York, NY 10019, USA;
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Maimonides Medical Center, Brooklyn, NY 11219, USA
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, SUNY Downstate Health Sciences University, Brooklyn, NY 11203, USA
- Correspondence:
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8
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Lee HS, Hwang JS. Impact of Type 2 Diabetes Mellitus and Antidiabetic Medications on Bone Metabolism. Curr Diab Rep 2020; 20:78. [PMID: 33247351 DOI: 10.1007/s11892-020-01361-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/26/2020] [Indexed: 12/25/2022]
Abstract
PURPOSE OF REVIEW This review focuses on the complex interactions between hyperglycemia and bone fragility and the effects of antidiabetic medications on bone metabolism. RECENT FINDINGS Type 2 diabetes (T2D) is associated with increased risk of bone fracture even in those with increased or normal bone mineral density (BMD). The pathophysiology of diabetic bone disease is not completely understood, but it is thought to be multifactorial and associated with complex cross talk among factors such as AGEs, IGF-1, enteric hormones, and pro-inflammatory cytokines. Treatment for T2D may have an impact on bone metabolism. Diabetic bone disease should be considered a serious complication of long-standing T2D.
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Affiliation(s)
- Hae Sang Lee
- Department of Pediatrics, Ajou University Hospital, Ajou University School of Medicine, Ajou University Hospital, San 5, Wonchon-dong, Yeongtong-gu, Suwon, 443-721, Korea
| | - Jin Soon Hwang
- Department of Pediatrics, Ajou University Hospital, Ajou University School of Medicine, Ajou University Hospital, San 5, Wonchon-dong, Yeongtong-gu, Suwon, 443-721, Korea.
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9
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Al-Sofiani M, MacLeod S, Ghanim H, Stecker N, Hall J, Lippes H. Type 1 diabetes and hearing loss: Audiometric assessment and measurement of circulating levels of soluble receptor for advanced glycation end products. Diabetes Metab Res Rev 2020; 36:e3312. [PMID: 32191386 DOI: 10.1002/dmrr.3312] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 12/25/2019] [Accepted: 03/08/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND We examined the hearing function in adults with and without type 1 diabetes (T1D) to investigate whether an association exists between hearing loss and duration of diabetes, haemoglobin A1C level, diabetes complications and levels of select serum and urinary biomarkers. METHODS We measured pure tone audiometry (PTA) thresholds; serum levels of C-reactive protein (CRP), vascular endothelial growth factor (VEGF), soluble receptors for advanced glycation end-product (sRAGE); and urinary isoprostane in 30 adults with T1D (age 43.8 ± 11.4 years). We also measured PTA thresholds in 11 adults without diabetes (age 53 ± 5.5 years). RESULTS 63.3% of adults with T1D had high-frequency hearing loss. Among adults with T1D, those with hearing loss were older (48.2 vs 36.2 years old, P < .01), had a longer duration of diabetes (30.7 vs 21.2 years, P = .02), a greater prevalence of peripheral neuropathy (57.9 vs 9.1%, P = .02) and significantly lower median levels of sRAGE (1054.27 vs 1306.83 pg/mL, P = .03) compared to those with normal hearing. Adults with T1D between the ages of 40 and 60 years old, who had diabetes for ≥35 years, had significantly higher PTA thresholds at both 500and 8000 Hz than age-matched adults without diabetes. CONCLUSIONS A significant proportion of adults with T1D have high-frequency hearing loss before age of 60 that is positively associated with age, duration of diabetes and presence of peripheral neuropathy. Our results are in support of previous studies suggesting a potential protective role of sRAGE against AGE toxicity and diabetes complications.
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Affiliation(s)
- Mohammed Al-Sofiani
- Endocrinology Unit, Department of Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
- Division of Endocrinology, Diabetes & Metabolism, The Johns Hopkins University, Baltimore, Maryland, USA
- Strategic Center for Diabetes Research, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Sara MacLeod
- Internal Medicine, State University of New York at Buffalo, Catholic Health System, Buffalo, New York, USA
| | - Husam Ghanim
- Division of Endocrinology, Diabetes and Metabolism, State University of New York at Buffalo, Kaleida Health, Buffalo, New York, USA
| | - Nancy Stecker
- Department of Communicative Disorders and Sciences, State University of New York at Buffalo, Buffalo, New York, USA
| | - John Hall
- Internal Medicine, State University of New York at Buffalo, Catholic Health System, Buffalo, New York, USA
| | - Howard Lippes
- Internal Medicine, State University of New York at Buffalo, Catholic Health System, Buffalo, New York, USA
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10
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Do MH, Choi J, Kim Y, Ha SK, Yoo G, Hur J. Syzygium aromaticum Reduces Diabetes-induced Glucotoxicity via the NRF2/Glo1 Pathway. PLANTA MEDICA 2020; 86:876-883. [PMID: 32645736 DOI: 10.1055/a-1203-0452] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Advanced glycation end products and methylglyoxal are known to show increased levels in diabetic conditions and induce diverse metabolic disorders. However, the antiglycation ability of the bark of Syzygium aromaticum is not yet studied. In this study, we determined the inhibitory effects of S. aromaticum on AGE formation. Moreover, S. aromaticum showed breakage and inhibitory ability against the formation of AGE-collagen crosslinks. In SV40 MES13 cells, treatment with the S. aromaticum extract significantly ameliorated MG-induced oxidative stress as well as cytotoxicity. Furthermore, in the S. aromaticum extract-treated group, there was a reduction in levels of several diabetic markers, such as blood glucose, kidney weight, and urinary albumin to creatinine ratio in streptozotocin-induced diabetic rats. Treatment with the S. aromaticum extract significantly increased the expression of nuclear factor erythroid 2-related factor 2, a transcription factor involved in the expression of antioxidant enzymes. Moreover, the treatment significantly upregulated the expression of glyoxalase 1 and downregulated the expression of receptor for AGEs. These results suggest that the S. aromaticum extract might ameliorate diabetes-induced renal damage by inhibiting the AGE-induced glucotoxicity and oxidative stress through the Nrf2/Glo1 pathway.
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Affiliation(s)
- Moon Ho Do
- Korea Food Research Institute, 245, Nongsaengmyeong-ro, Iseo-myeon, Wanju-Gun, Jeollabuk-do, Republic of Korea
| | - Jiwon Choi
- Korea Food Research Institute, 245, Nongsaengmyeong-ro, Iseo-myeon, Wanju-Gun, Jeollabuk-do, Republic of Korea
| | - Yoonsook Kim
- Korea Food Research Institute, 245, Nongsaengmyeong-ro, Iseo-myeon, Wanju-Gun, Jeollabuk-do, Republic of Korea
| | - Sang Keun Ha
- Korea Food Research Institute, 245, Nongsaengmyeong-ro, Iseo-myeon, Wanju-Gun, Jeollabuk-do, Republic of Korea
- Division of Food Biotechnology, University of Science and Technology, Daejeon, Republic of Korea
| | - Guijae Yoo
- Korea Food Research Institute, 245, Nongsaengmyeong-ro, Iseo-myeon, Wanju-Gun, Jeollabuk-do, Republic of Korea
| | - Jinyoung Hur
- Korea Food Research Institute, 245, Nongsaengmyeong-ro, Iseo-myeon, Wanju-Gun, Jeollabuk-do, Republic of Korea
- Division of Food Biotechnology, University of Science and Technology, Daejeon, Republic of Korea
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11
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Kerkeni M, Gharbi J. RAGE receptor: May be a potential inflammatory mediator for SARS-COV-2 infection? Med Hypotheses 2020; 144:109950. [PMID: 32531537 PMCID: PMC7273142 DOI: 10.1016/j.mehy.2020.109950] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 06/03/2020] [Indexed: 12/15/2022]
Affiliation(s)
- Mohsen Kerkeni
- UR17ES30 "Virology & Antiviral Strategies", Higher Institute of Biotechnology, University of Monastir, Tunisia.
| | - Jawhar Gharbi
- UR17ES30 "Virology & Antiviral Strategies", Higher Institute of Biotechnology, University of Monastir, Tunisia
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12
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Hygum K, Starup-Linde J, Langdahl BL. Diabetes and bone. Osteoporos Sarcopenia 2019; 5:29-37. [PMID: 31346556 PMCID: PMC6630041 DOI: 10.1016/j.afos.2019.05.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/11/2019] [Accepted: 05/03/2019] [Indexed: 12/16/2022] Open
Abstract
Bone disease is a serious complication to diabetes. Patients with type 1 diabetes (T1D) and type 2 diabetes (T2D) suffer from an increased risk of fracture, most notably at the hip, compared with patients without diabetes. Confounders such as patient sex, age, body mass index, blood glucose status, fall risk, and diabetes medications may influence the fracture risk. Different underlying mechanisms contribute to bone disease in patients with diabetes. Bone quality is affected by low bone turnover in T1D and T2D, and furthermore, incorporation of advanced glycation end-products, changes in the incretin hormone response, and microvascular complications contribute to impaired bone quality and increased fracture risk. Diagnosis of bone disease in patients with diabetes is a challenge as current methods for fracture prediction such as bone mineral density T-score and fracture risk assessment tools underestimate fracture risk for patients with T1D and T2D. This review focuses on bone disease and fracture risk in patients with diabetes regarding epidemiology, underlying disease mechanisms, and diagnostic methods, and we also provide considerations regarding the management of diabetes patients with bone disease in terms of an intervention threshold and different treatments.
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Affiliation(s)
| | | | - Bente L. Langdahl
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
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13
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Luo WJ, Zhang WF. The relationship of blood cell-associated inflammatory indices and diabetic retinopathy: a Meta-analysis and systematic review. Int J Ophthalmol 2019; 12:312-323. [PMID: 30809490 DOI: 10.18240/ijo.2019.02.20] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 08/02/2018] [Indexed: 12/17/2022] Open
Abstract
AIM To explore the correlation between several blood cell-associated inflammatory indices including mean platelet volume (MPV), platelet distribution width (PDW), neutrophil to lymphocyte ratio (NLR) and platelet-lymphocyte ratio (PLR), and the presence and severity of diabetic retinopathy (DR). METHODS We searched for eligible studies from PubMed, EMBASE, Web of Science and CNKI up to December 13, 2017. Standardized mean difference (SMD) calculated with confidence interval (CI) of 95% was used to estimate the values of those indices. RESULTS A total of 31 studies were included in the present Meta-analysis. As compared with type 2 diabetes mellitus (T2DM) patients without DR, the values of MPV, PDW, NLR, and PLR were higher in patients with DR (SMD=0.67; 95%CI: 0.36 to 0.98; SMD=0.51; 95%CI: 0.27 to 0.75; SMD=0.77; 95%CI: 0.49 to 1.05 and SMD=1.18; 95%CI: 0.07 to 2.28). Additionally, it was also observed that MPV was closely correlated with the severity of DR. CONCLUSION MPV, PDW, NLR, and PLR could be recommended as diagnostic biomarkers for DR, and MPV could be applied to assess the severity of DR.
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Affiliation(s)
- Wen-Juan Luo
- Department of Ophthalmology, Lanzhou University Second Hospital, Lanzhou 730000, Gansu Province, China
| | - Wen-Fang Zhang
- Department of Ophthalmology, Lanzhou University Second Hospital, Lanzhou 730000, Gansu Province, China
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14
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Jafari Nakhjavani MR, Jafarpour M, Ghorbanihaghjo A, Abedi Azar S, Malek Mahdavi A. Relationship between serum-soluble receptor for advanced glycation end products (sRAGE) and disease activity in rheumatoid arthritis patients. Mod Rheumatol 2019; 29:943-948. [PMID: 30474471 DOI: 10.1080/14397595.2018.1551107] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Objective: Considering the important role of serum soluble receptor for advanced glycation end product (sRAGE/RAGE)-ligand system in rheumatoid arthritis (RA), this study aimed to evaluate serum sRAGE levels in RA patients compared to healthy subjects and to assess whether there is an association between sRAGE levels and disease characteristics in RA.Methods: In this cross-sectional study, 60 RA patients according to the ACR/EULAR 2010 criteria and 30 age- and sex-matched healthy controls were included. In patients, clinical examination was performed and disease activity score 28 (DAS-28) measure of disease activity was assessed. Serum sRAGE level was measured using ELISA kit.Results: The mean ± SD age of patients and controls was 54.86 ± 11.65 and 50.71 ± 3.72 years, respectively). Serum sRAGE level was significantly higher in RA patients (median [25th and 75th percentiles], 1000.3 [792.00, 1486.8]) compared to healthy controls (median [25th and 75th percentiles], 293.25 [220.35, 364.24]) (p < .001). There was significant difference in serum sRAGE level according to the activity of disease (p < .001). There were significant positive correlations between serum sRAGE level with disease activity (r = 0.67, p < .001), ESR (r = 0.411, p = .001) and CRP (r = 0.273, p = .035). There were no significant correlations between serum sRAGE level with demographic characteristics as well as biochemical measurements including serum creatinine, BUN, RF, and Anti-CCP (p > .05).Conclusions: Our study revealed higher serum sRAGE levels in RA patients compared to healthy controls, which correlated positively with disease activity.
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Affiliation(s)
| | - Mahdi Jafarpour
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Ghorbanihaghjo
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sima Abedi Azar
- Kidney Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Aida Malek Mahdavi
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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15
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Ferrari SL, Abrahamsen B, Napoli N, Akesson K, Chandran M, Eastell R, El-Hajj Fuleihan G, Josse R, Kendler DL, Kraenzlin M, Suzuki A, Pierroz DD, Schwartz AV, Leslie WD. Diagnosis and management of bone fragility in diabetes: an emerging challenge. Osteoporos Int 2018; 29:2585-2596. [PMID: 30066131 PMCID: PMC6267152 DOI: 10.1007/s00198-018-4650-2] [Citation(s) in RCA: 193] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 07/19/2018] [Indexed: 12/11/2022]
Abstract
Fragility fractures are increasingly recognized as a complication of both type 1 and type 2 diabetes, with fracture risk that increases with disease duration and poor glycemic control. Yet the identification and management of fracture risk in these patients remains challenging. This review explores the clinical characteristics of bone fragility in adults with diabetes and highlights recent studies that have evaluated bone mineral density (BMD), bone microstructure and material properties, biochemical markers, and fracture prediction algorithms (i.e., FRAX) in these patients. It further reviews the impact of diabetes drugs on bone as well as the efficacy of osteoporosis treatments in this population. We finally propose an algorithm for the identification and management of diabetic patients at increased fracture risk.
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Affiliation(s)
- S L Ferrari
- Division of Bone Diseases, Department of Internal Medicine Specialties, Geneva University Hospital & Faculty of Medicine, 1205, Geneva, Switzerland.
| | - B Abrahamsen
- Department of Medicine, Holbaek Hospital, Holbaek, Denmark
- OPEN, Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - N Napoli
- Unit of Endocrinology and Diabetes, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy
- Division of Bone and Mineral Diseases, Washington University in St Louis, St Louis, MO, USA
| | - K Akesson
- Department of Clinical Sciences, Clinical and Molecular Osteoporosis Unit, Lund University, Malmö, Sweden
| | - M Chandran
- Osteoporosis and Bone Metabolism Unit, Department of Endocrinology, Singapore General Hospital, Singapore, Singapore
| | - R Eastell
- Academic Unit of Bone Metabolism, Mellanby Centre for Bone Research, University of Sheffield, Sheffield, UK
| | - G El-Hajj Fuleihan
- Department of Internal Medicine, Division of Endocrinology, Calcium Metabolism and Osteoporosis Program, WHO Collaborating Center for Metabolic Bone Disorders, American University of Beirut Medical Center, Riad El Solh, Beirut, Lebanon
| | - R Josse
- Department of Medicine and Department of Nutritional Sciences, University of Toronto, Toronto, ON, Canada
- Division of Endocrinology and Metabolism, St. Michael's Hospital, Toronto, ON, Canada
| | - D L Kendler
- Department of Medicine, Division of Endocrinology, University of British Columbia, Vancouver, BC, Canada
| | - M Kraenzlin
- Endonet, Endocrine Clinic and Laboratory, Basel, Switzerland
| | - A Suzuki
- Division of Endocrinology and Metabolism, Fujita Health University, Toyoake, Aichi, Japan
| | - D D Pierroz
- International Osteoporosis Foundation, Nyon, Switzerland
| | - A V Schwartz
- Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USA
| | - W D Leslie
- Department of Internal Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
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Baccouche B, Benlarbi M, Barber AJ, Ben Chaouacha-Chekir R. Short-Term Administration of Astaxanthin Attenuates Retinal Changes in Diet-Induced Diabetic Psammomys obesus. Curr Eye Res 2018; 43:1177-1189. [PMID: 30028214 DOI: 10.1080/02713683.2018.1484143] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 05/22/2018] [Accepted: 05/28/2018] [Indexed: 02/08/2023]
Abstract
OBJECTIVES Psammomys obesus is a high-fat diet (HFD)-fed animal model of obesity and type 2 diabetes recently explored as a model of non-proliferative diabetic retinopathy. This study tested the protective effect of the pigment astaxanthin (AST) in the P. obesus diabetic retina. METHODS Young adult P. obesus were randomly assigned to two groups. The control group received a normal diet consisting of a plant-based regimen, and the HFD group received an enriched laboratory chow. After 3 months, control and diabetic rodents were administered vehicle or AST, daily for 7 days. Body weight, blood glucose, and plasma pentosidine were assessed. Frozen sections of retinas were immunolabeled for markers of oxidative stress, glial reactivity and retinal ganglion cell bodies, and imaged by confocal microscopy. RESULTS Retinal tissue from AST-treated control and HFD-diabetic P. obesus showed a greater expression of the antioxidant enzyme heme oxygenase-1 (HO-1). In retinas of HFD-diabetic AST-treated P. obesus, cellular retinaldehyde binding protein and glutamine synthetase in Müller cells were more intense compared to the untreated HFD-diabetic group. HFD-induced diabetes downregulated the expression of glial fibrillary acidic protein in astrocytes, the POU domain protein 3A in retinal ganglion cells, and synaptophysin throughout the plexiform layers. DISCUSSION Our results show that type 2-like diabetes induced by HFD affected glial and neuronal retinal cell homeostasis. AST treatment induced the antioxidant enzyme HO-1 and reduced glial reactivity. These findings suggest that diabetic P. obesus is a useful model of HFD-induced obesity and diabetes to evaluate early neuroglial retinal alterations and antioxidant neuroprotection mechanisms in DR.
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Affiliation(s)
- Basma Baccouche
- a Laboratoire de Physiopthologies , Alimentations et Biomolécules (PAB), Institut Supérieur de Biotechnologie de Sidi Thabet (ISBST), Univ Manouba (UMA), BiotechPole Sidi Thabet , Ariana , Tunisie
- b Faculté des Sciences de Bizerte (FSB) , Université de Carthage (UCAR) , Tunis , Tunisie
| | - Maha Benlarbi
- a Laboratoire de Physiopthologies , Alimentations et Biomolécules (PAB), Institut Supérieur de Biotechnologie de Sidi Thabet (ISBST), Univ Manouba (UMA), BiotechPole Sidi Thabet , Ariana , Tunisie
| | - Alistair J Barber
- c Department of Ophthalmology , Penn State Hershey Eye Center, Milton S. Hershey Medical Center, Penn State College of Medicine , Hershey , PA , USA
| | - Rafika Ben Chaouacha-Chekir
- a Laboratoire de Physiopthologies , Alimentations et Biomolécules (PAB), Institut Supérieur de Biotechnologie de Sidi Thabet (ISBST), Univ Manouba (UMA), BiotechPole Sidi Thabet , Ariana , Tunisie
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Merhi Z, Buyuk E, Cipolla MJ. Advanced glycation end products alter steroidogenic gene expression by granulosa cells: an effect partially reversible by vitamin D. Mol Hum Reprod 2018; 24:318-326. [PMID: 29538679 PMCID: PMC6530817 DOI: 10.1093/molehr/gay014] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 02/28/2018] [Accepted: 03/08/2018] [Indexed: 12/21/2022] Open
Abstract
STUDY QUESTION Does vitamin D attenuate the adverse effects of advanced glycation end products (AGEs) on steroidogenesis by human granulosa cells (GCs)? SUMMARY ANSWER AGEs alter the expression of genes important in steroidogenesis while 1,25-dihydroxyvitamin D3 (vit D3) in vitro attenuates some of the actions of AGEs on steroidogenic gene expression, possibly by downregulating the expression of the pro-inflammatory cell membrane receptor for AGEs (RAGE). WHAT IS KNOWN ALREADY Vitamin D attenuates the pro-inflammatory effects of AGEs in non-ovarian tissues. STUDY DESIGN, SIZE, DURATION Women who were undergoing IVF were enrolled. Follicular fluid samples (n = 71) were collected and cumulus GCs (n = 12) were treated in culture. PARTICIPANTS/MATERIALS, SETTING, METHODS Follicular fluid levels of the anti-inflammatory soluble RAGE (sRAGE), AGEs and 25-hydroxyvitamin D (25-OHD) were quantified for possible correlations. GCs of each participant were split equally and treated with either media alone (control) or with human glycated albumin (HGA as a precursor for AGEs) with or without vit D3 after which RT-PCR and immunofluorescence were performed and cell culture media estradiol (E2) levels were compared. MAIN RESULTS AND THE ROLE OF CHANCE In follicular fluid, sRAGE levels were positively correlated with 25-OHD levels. HGA treatment (i) increased CYP11A1 (by 48%), 3β-HSD (by 38%), StAR (by 42%), CYP17A1 (by 30%) and LHR (by 37%) mRNA expression levels (P < 0.05 for all) but did not alter CYP19A1 or FSHR mRNA expression levels; and (ii) increased E2 release in cell culture media (P = 0.02). Vit D3 treatment (i) downregulated RAGE mRNA expression by 33% and RAGE protein levels by 44% (P < 0.05); (ii) inhibited the HGA-induced increase in CYP11A1, StAR, CYP17A1 and LHR mRNA levels, but not the increase in 3β-HSD mRNA levels; and (iii) did not inhibit the HGA-induced E2 release in cell culture media. LIMITATIONS REASONS FOR CAUTION This study used luteinized GCs that were collected from women who received gonadotropins thus the results obtained may not fully extrapolate to non-luteinized GCs in vivo. WIDER IMPLICATIONS OF THE FINDINGS This study suggests that there is a relationship between AGEs and their receptors (RAGE and sRAGE) with vitamin D. Understanding the interaction between AGEs and vitamin D in ovarian physiology could lead to a more targeted therapy for the treatment of ovarian dysfunction. STUDY FUNDING/COMPETING INTEREST(S) Funding was received from NIH (R01 NS045940), American Society for Reproductive Medicine, Ferring Pharmaceuticals Inc., and University of Vermont College of Medicine Bridge Funds. All authors have nothing to disclose.
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Affiliation(s)
- Z Merhi
- Department of Obstetrics and Gynecology, Division of Reproductive Biology, New York University School of Medicine, 4 Columbus Circle, Fourth Floor, New York, NY 10019, USA
| | - E Buyuk
- Department of Obstetrics & Gynecology and Womens' Health, Division of Reproductive Endocrinology and Infertility, Montefiore’s Institute for Reproductive Medicine and Health, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA
| | - M J Cipolla
- Department of Neurological Sciences and Obstetrics, Gynecology and Reproductive Sciences, University of Vermont College of Medicine, 111 Colchester Ave, Burlington, VT 05401, USA
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Methylglyoxal: A Relevant Marker of Disease Activity in Patients with Rheumatoid Arthritis. DISEASE MARKERS 2018; 2018:8735926. [PMID: 29606988 PMCID: PMC5828101 DOI: 10.1155/2018/8735926] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 01/01/2018] [Indexed: 12/29/2022]
Abstract
Background The contribution of methylglyoxal (MGO) and soluble receptor for advanced glycation end products (sRAGE) in the presence of rheumatoid arthritis (RA) is still unknown. We investigated whether serum MGO and sRAGE were related to the presence of disease activity in RA. Methods 80 patients with RA and 30 control subjects were included in a cross-sectional study. The severity of RA was assessed using the disease activity score for 28 joints (DAS28). Serum MGO and sRAGE were measured by ELISA. Results Serum MGO levels were significantly higher in patients with RA versus control subjects (P < 0.001) and were increased in RA patients with higher disease activity versus RA patients with moderate disease activity (P = 0.019). Serum sRAGE concentrations were significantly decreased in RA patients with higher disease activity versus RA patients with moderate disease activity and versus control subjects (P = 0.004; P = 0.002, resp.). A multiple logistic regression analysis demonstrated that MGO was independently associated with the presence of activity disease in RA (OR = 1.17, 95% CI: 1.02–1.31, P = 0.01). Conclusion Serum MGO and sRAGE levels are inversely related to the activity of RA, and MGO is independently associated with a higher disease activity of RA.
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Knani I, Bouzidi H, Zrour S, Bergaoui N, Hammami M, Kerkeni M. Increased serum concentrations of N ɛ-carboxymethyllysine are related to the presence and the severity of rheumatoid arthritis. Ann Clin Biochem 2017; 55:430-436. [PMID: 28882063 DOI: 10.1177/0004563217733500] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background There are limited data regarding the contribution of advanced glycation end products in the presence of rheumatoid arthritis. We investigated whether serum Nɛ-carboxymethyllysine and pentosidine were related to the presence and the severity of rheumatoid arthritis. Methods Eighty patients with rheumatoid arthritis and 30 control subjects were included in a cross-sectional study. The severity of rheumatoid arthritis was assessed using the disease activity score for 28 joints. Serum Nɛ-carboxymethyllysine and pentosidine were measured by enzyme-linked immunosorbent assay. Results Serum Nɛ-carboxymethyllysine and pentosidine concentrations were significantly higher in patients with rheumatoid arthritis vs. control subjects ( P < 0.001). Serum Nɛ-carboxymethyllysine and pentosidine concentrations were significantly higher in rheumatoid arthritis patients with high disease activity vs. rheumatoid arthritis patients with moderate disease activity ( P < 0.001, P = 0.019, respectively). A multiple logistic regression analysis demonstrated that Nɛ-carboxymethyllysine was independently associated with the presence of rheumatoid arthritis (OR = 1.21, 95% CI: 1.05-1.39, P = 0.006). Furthermore, in a multivariate stepwise regression analysis, Nɛ-carboxymethyllysine was independently correlated with disease activity score for 28 joints (standardized β = 0.43, P = 0.001). Conclusion Serum Nɛ-carboxymethyllysine and pentosidine were increased during rheumatoid arthritis, and Nɛ-carboxymethyllysine was independently associated with the presence and the severity of rheumatoid arthritis.
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Affiliation(s)
- Ines Knani
- 1 Laboratory of Biochemistry, LR12ES05, Faculty of Medicine, University of Monastir, Monastir, Tunisia
| | - Hassan Bouzidi
- 2 Laboratory of Biochemistry, University Hospital-Tahar Sfar, Mahdia, Tunisia
| | - Saoussen Zrour
- 3 Department of Rheumatology, University Hospital of Fattouma Bourguiba, Monastir, Tunisia
| | - Naceur Bergaoui
- 3 Department of Rheumatology, University Hospital of Fattouma Bourguiba, Monastir, Tunisia
| | - Mohamed Hammami
- 1 Laboratory of Biochemistry, LR12ES05, Faculty of Medicine, University of Monastir, Monastir, Tunisia
| | - Mohsen Kerkeni
- 1 Laboratory of Biochemistry, LR12ES05, Faculty of Medicine, University of Monastir, Monastir, Tunisia
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Correlation between follicular fluid levels of sRAGE and vitamin D in women with PCOS. J Assist Reprod Genet 2017; 34:1507-1513. [PMID: 28825156 DOI: 10.1007/s10815-017-1011-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 07/27/2017] [Indexed: 01/13/2023] Open
Abstract
PURPOSE The pro-inflammatory advanced glycation end products (AGEs) and their anti-inflammatory soluble receptors, sRAGE, play a role in the pathogenesis of PCOS. There is a correlation between vitamin D (vit D) and sRAGE in the serum, whereby vit D replacement increases serum sRAGE levels in women with PCOS, thus incurring a protective anti-inflammatory role. OBJECTIVE This study aims to compare levels of sRAGE, N-carboxymethyl-lysine (CML; one of the AGEs), and 25-hydroxy-vit D in the follicular fluid (FF) of women with or without PCOS, and to evaluate the correlation between sRAGE and 25-hydroxy-vit D in the FF. MATERIAL AND METHODS Women with (n = 12) or without (n = 13) PCOS who underwent IVF were prospectively enrolled. RESULTS Women with PCOS had significantly higher anti-Mullerian hormone levels, higher number of total retrieved and mature oocytes, and higher number of day 3 and day 5 embryos formed. Compared to women without PCOS, women with PCOS had significantly lower FF sRAGE levels. In women with PCOS, in women without PCOS, and in all participants together, there was a significant positive correlation between sRAGE and 25-hydroxy-vit D. sRAGE positively correlated with CML in women without PCOS but not in women with PCOS. CONCLUSIONS In women with PCOS, the low ovarian levels of the anti-inflammatory sRAGE suggest that sRAGE could represent a biomarker and a potential therapeutic target for ovarian dysfunction in PCOS. Whether there is a direct causal relationship between sRAGE and vit D in the ovaries remains to be determined.
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Napoli N, Chandran M, Pierroz DD, Abrahamsen B, Schwartz AV, Ferrari SL. Mechanisms of diabetes mellitus-induced bone fragility. Nat Rev Endocrinol 2017; 13:208-219. [PMID: 27658727 DOI: 10.1038/nrendo.2016.153] [Citation(s) in RCA: 610] [Impact Index Per Article: 87.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The risk of fragility fractures is increased in patients with either type 1 diabetes mellitus (T1DM) or type 2 diabetes mellitus (T2DM). Although BMD is decreased in T1DM, BMD in T2DM is often normal or even slightly elevated compared with an age-matched control population. However, in both T1DM and T2DM, bone turnover is decreased and the bone material properties and microstructure of bone are altered; the latter particularly so when microvascular complications are present. The pathophysiological mechanisms underlying bone fragility in diabetes mellitus are complex, and include hyperglycaemia, oxidative stress and the accumulation of advanced glycation endproducts that compromise collagen properties, increase marrow adiposity, release inflammatory factors and adipokines from visceral fat, and potentially alter the function of osteocytes. Additional factors including treatment-induced hypoglycaemia, certain antidiabetic medications with a direct effect on bone and mineral metabolism (such as thiazolidinediones), as well as an increased propensity for falls, all contribute to the increased fracture risk in patients with diabetes mellitus.
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Affiliation(s)
- Nicola Napoli
- Unit of Endocrinology and Diabetes, Department of Medicine, Università Campus Bio-Medico di Roma, Via Alvaro di Portillo 21, 00128 Roma, Italy
- Division of Bone and Mineral Diseases, Washington University in St Louis, St Louis, Missouri, USA
- Diabetes and Bone Network
| | - Manju Chandran
- Osteoporosis and Bone Metabolism Unit, Department of Endocrinology, Singapore General Hospital, Outram Road, 169608 Singapore
| | - Dominique D Pierroz
- International Osteoporosis Foundation (IOF), Rue Juste-Olivier 9, 1260 Nyon, Switzerland
| | - Bo Abrahamsen
- University of Southern Denmark, Department of Medicine, Faculty of Health, Holbaek Hospital, Holbaek, Denmark
| | - Ann V Schwartz
- Department of Epidemiology and Biostatistics, University of California, 550 16th Street, San Francisco, California 94158, USA
| | - Serge L Ferrari
- Service of Bone Diseases, Geneva University Hospital and Faculty of Medicine, Rue Gabrielle-Perret-Gentil 4, 1205 Geneva, Switzerland
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Reynaert NL, Gopal P, Rutten EP, Wouters EF, Schalkwijk CG. Advanced glycation end products and their receptor in age-related, non-communicable chronic inflammatory diseases; Overview of clinical evidence and potential contributions to disease. Int J Biochem Cell Biol 2016; 81:403-418. [DOI: 10.1016/j.biocel.2016.06.016] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 06/24/2016] [Accepted: 06/28/2016] [Indexed: 12/31/2022]
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Chilelli NC, Ragazzi E, Valentini R, Cosma C, Ferraresso S, Lapolla A, Sartore G. Curcumin and Boswellia serrata Modulate the Glyco-Oxidative Status and Lipo-Oxidation in Master Athletes. Nutrients 2016; 8:nu8110745. [PMID: 27879642 PMCID: PMC5133128 DOI: 10.3390/nu8110745] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 11/10/2016] [Accepted: 11/15/2016] [Indexed: 01/11/2023] Open
Abstract
Background: Chronic intensive exercise is associated with a greater induction of oxidative stress and with an excess of endogenous advanced glycation end-products (AGEs). Curcumin can reduce the accumulation of AGEs in vitro and in animal models. We examined whether supplementation with curcumin and Boswellia serrata (BSE) gum resin for 3 months could affect plasma levels of markers of oxidative stress, inflammation, and glycation in healthy master cyclists. Methods. Forty-seven healthy male athletes were randomly assigned to Group 1, consisting of 22 subjects given a Mediterranean diet (MD) alone (MD group), and Group 2 consisted of 25 subjects given a MD plus curcumin and BSE (curcumin/BSE group). Interleukin-6 (IL-6), tumor necrosis factor-α (TNFα), high-sensitivity c-reactive protein (hs-CRP), total AGE, soluble receptor for AGE (sRAGE), malondialdehyde (MDA), plasma phospholipid fatty acid (PPFA) composition, and non-esterified fatty acids (NEFA) were tested at baseline and after 12 weeks. Results: sRAGE, NEFA, and MDA decreased significantly in both groups, while only the curcumin/BSE group showed a significant decline in total AGE. Only the changes in total AGE and MDA differed significantly between the curcumin/BSE and MD groups. Conclusions. Our data suggest a positive effect of supplementation with curcumin and BSE on glycoxidation and lipid peroxidation in chronically exercising master athletes.
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Affiliation(s)
- Nino Cristiano Chilelli
- Department of Medicine-DIMED, University of Padova, Diabetology and Dietetics, ULSS 16, via dei Colli, 4, 35100 Padova, Italy.
| | - Eugenio Ragazzi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35100 Padova, Italy.
| | - Romina Valentini
- Department of Medicine-DIMED, University of Padova, Diabetology and Dietetics, ULSS 16, via dei Colli, 4, 35100 Padova, Italy.
| | - Chiara Cosma
- Department of Laboratory Medicine, University of Padova, 35100 Padova, Italy.
| | - Stefania Ferraresso
- Department of Medicine-DIMED, University of Padova, Diabetology and Dietetics, ULSS 16, via dei Colli, 4, 35100 Padova, Italy.
| | - Annunziata Lapolla
- Department of Medicine-DIMED, University of Padova, Diabetology and Dietetics, ULSS 16, via dei Colli, 4, 35100 Padova, Italy.
| | - Giovanni Sartore
- Department of Medicine-DIMED, University of Padova, Diabetology and Dietetics, ULSS 16, via dei Colli, 4, 35100 Padova, Italy.
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Plasma Levels of Pentosidine, Carboxymethyl-Lysine, Soluble Receptor for Advanced Glycation End Products, and Metabolic Syndrome: The Metformin Effect. DISEASE MARKERS 2016; 2016:6248264. [PMID: 27829696 PMCID: PMC5088278 DOI: 10.1155/2016/6248264] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 08/27/2016] [Accepted: 09/19/2016] [Indexed: 01/01/2023]
Abstract
Metabolic syndrome (MetS) is considered one of the most important public health problems. Several and controversial studies showed that the role of advanced glycation end products (AGEs) and their receptor in the development of metabolic syndrome and therapeutic pathways is still unsolved. We have investigated whether plasma pentosidine, carboxymethyl-lysine (CML), and soluble receptor for advanced glycation end products (sRAGE) levels were increased in patients with MetS and the effect of metformin in plasma levels of pentosidine, CML, and sRAGE. 80 control subjects and 86 patients were included in this study. Pentosidine, CML, and sRAGE were measured in plasma by enzyme-linked immunosorbent assay (ELISA). Plasma pentosidine, CML, and sRAGE levels were significantly increased in patients compared to control subjects (P < 0.001, P < 0.001, and P = 0.014, resp.). Plasma levels of pentosidine were significantly decreased in patients who received metformin compared to untreated patients (P = 0.01). However, there was no significant difference between patients treated with metformin and untreated patients in plasma CML levels. Plasma levels of sRAGE were significantly increased in patients who received metformin and ACE inhibitors (P < 0.001 and P = 0.002, resp.). However, in a multiple stepwise regression analysis, pentosidine, sRAGE, and drugs treatments were not independently associated. Patients with metabolic syndrome showed increased levels of AGEs such as pentosidine and CML. Metformin treatment showed a decreased level of pentosidine but not of CML. Therapeutic pathways of AGEs development should be taken into account and further experimental and in vitro studies merit for advanced research.
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Hunt WR, Helfman BR, McCarty NA, Hansen JM. Advanced glycation end products are elevated in cystic fibrosis-related diabetes and correlate with worse lung function. J Cyst Fibros 2016; 15:681-8. [DOI: 10.1016/j.jcf.2015.12.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 11/09/2015] [Accepted: 12/14/2015] [Indexed: 11/27/2022]
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Simó-Servat O, Simó R, Hernández C. Circulating Biomarkers of Diabetic Retinopathy: An Overview Based on Physiopathology. J Diabetes Res 2016; 2016:5263798. [PMID: 27376090 PMCID: PMC4916280 DOI: 10.1155/2016/5263798] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Accepted: 05/18/2016] [Indexed: 12/21/2022] Open
Abstract
Diabetic retinopathy (DR) is the main cause of working-age adult-onset blindness. The currently available treatments for DR are applicable only at advanced stages of the disease and are associated with significant adverse effects. In early stages of DR the only therapeutic strategy that physicians can offer is a tight control of the risk factors for DR. Therefore, new pharmacological treatments for these early stages of the disease are required. In order to develop therapeutic strategies for early stages of DR new diagnostic tools are urgently needed. In this regard, circulating biomarkers could be useful to detect early disease, to identify those diabetic patients most prone to progressive worsening who ought to be followed up more often and who could obtain the most benefit from these therapies, and to monitor the effectiveness of new drugs for DR before more advanced DR stages have been reached. Research of biomarkers for DR has been mainly based on the pathogenic mechanism involved in the development of DR (i.e., AGEs, oxidative stress, endothelial dysfunction, inflammation, and proangiogenic factors). This review focuses on circulating biomarkers at both early and advanced stages that could be relevant for the prediction or detection of DR.
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Affiliation(s)
- Olga Simó-Servat
- Diabetes and Metabolism Research Unit, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Instituto de Salud Carlos III (ISCIII), Barcelona, Spain
| | - Rafael Simó
- Diabetes and Metabolism Research Unit, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Instituto de Salud Carlos III (ISCIII), Barcelona, Spain
| | - Cristina Hernández
- Diabetes and Metabolism Research Unit, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Instituto de Salud Carlos III (ISCIII), Barcelona, Spain
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Pusparajah P, Lee LH, Abdul Kadir K. Molecular Markers of Diabetic Retinopathy: Potential Screening Tool of the Future? Front Physiol 2016; 7:200. [PMID: 27313539 PMCID: PMC4887489 DOI: 10.3389/fphys.2016.00200] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 05/17/2016] [Indexed: 12/13/2022] Open
Abstract
Diabetic retinopathy (DR) is among the leading causes of new onset blindness in adults. Effective treatment may delay the onset and progression of this disease provided it is diagnosed early. At present retinopathy can only be diagnosed via formal examination of the eye by a trained specialist, which limits the population that can be effectively screened. An easily accessible, reliable screening biomarker of diabetic retinopathy would be of tremendous benefit in detecting the population in need of further assessment and treatment. This review highlights specific biomarkers that show promise as screening markers to detect early diabetic retinopathy or even to detect patients at increased risk of DR at the time of diagnosis of diabetes. The pathobiology of DR is complex and multifactorial giving rise to a wide array of potential biomarkers. This review provides an overview of these pathways and looks at older markers such as advanced glycation end products (AGEs), inflammatory markers, vascular endothelial growth factor (VEGF) as well as other newer proteins with a role in the pathogenesis of DR including neuroprotective factors such as brain derived neurotrophic factor (BDNF) and Pigment Epithelium Derived Factor (PEDF); SA100A12, pentraxin 3, brain natriuretic peptide, apelin 3, and chemerin as well as various metabolites such as lipoprotein A, folate, and homocysteine. We also consider the possible role of proteins identified through proteomics work whose levels are altered in the sera of patients with DR as screening markers though their role in pathophysiology remains to be characterized. The role of microRNA as a promising new screening marker is also discussed.
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Affiliation(s)
- Priyia Pusparajah
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia Bandar Sunway, Malaysia
| | - Learn-Han Lee
- School of Pharmacy, Monash University MalaysiaBandar Sunway, Malaysia; Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of PhayaoPhayao, Thailand
| | - Khalid Abdul Kadir
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia Bandar Sunway, Malaysia
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Zhang Y, Du Y, He JF, Li KJ. 8-iso-prostaglandin-F2α: a possible trigger or accelerator of diabetic retinopathy. Int J Ophthalmol 2016; 9:163-5. [PMID: 26949628 DOI: 10.18240/ijo.2016.01.27] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Accepted: 05/06/2015] [Indexed: 11/23/2022] Open
Affiliation(s)
- Ying Zhang
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Yi Du
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Jian-Feng He
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Kai-Jun Li
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
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Jenkins AJ, Joglekar MV, Hardikar AA, Keech AC, O'Neal DN, Januszewski AS. Biomarkers in Diabetic Retinopathy. Rev Diabet Stud 2015; 12:159-95. [PMID: 26676667 DOI: 10.1900/rds.2015.12.159] [Citation(s) in RCA: 174] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
There is a global diabetes epidemic correlating with an increase in obesity. This coincidence may lead to a rise in the prevalence of type 2 diabetes. There is also an as yet unexplained increase in the incidence of type 1 diabetes, which is not related to adiposity. Whilst improved diabetes care has substantially improved diabetes outcomes, the disease remains a common cause of working age adult-onset blindness. Diabetic retinopathy is the most frequently occurring complication of diabetes; it is greatly feared by many diabetes patients. There are multiple risk factors and markers for the onset and progression of diabetic retinopathy, yet residual risk remains. Screening for diabetic retinopathy is recommended to facilitate early detection and treatment. Common biomarkers of diabetic retinopathy and its risk in clinical practice today relate to the visualization of the retinal vasculature and measures of glycemia, lipids, blood pressure, body weight, smoking, and pregnancy status. Greater knowledge of novel biomarkers and mediators of diabetic retinopathy, such as those related to inflammation and angiogenesis, has contributed to the development of additional therapeutics, in particular for late-stage retinopathy, including intra-ocular corticosteroids and intravitreal vascular endothelial growth factor inhibitors ('anti-VEGFs') agents. Unfortunately, in spite of a range of treatments (including laser photocoagulation, intraocular steroids, and anti-VEGF agents, and more recently oral fenofibrate, a PPAR-alpha agonist lipid-lowering drug), many patients with diabetic retinopathy do not respond well to current therapeutics. Therefore, more effective treatments for diabetic retinopathy are necessary. New analytical techniques, in particular those related to molecular markers, are accelerating progress in diabetic retinopathy research. Given the increasing incidence and prevalence of diabetes, and the limited capacity of healthcare systems to screen and treat diabetic retinopathy, there is need to reliably identify and triage people with diabetes. Biomarkers may facilitate a better understanding of diabetic retinopathy, and contribute to the development of novel treatments and new clinical strategies to prevent vision loss in people with diabetes. This article reviews key aspects related to biomarker research, and focuses on some specific biomarkers relevant to diabetic retinopathy.
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Affiliation(s)
- Alicia J Jenkins
- NHMRC Clinical Trials Centre, University of Sydney, Camperdown, Sydney, Australia
| | - Mugdha V Joglekar
- NHMRC Clinical Trials Centre, University of Sydney, Camperdown, Sydney, Australia
| | | | - Anthony C Keech
- NHMRC Clinical Trials Centre, University of Sydney, Camperdown, Sydney, Australia
| | - David N O'Neal
- NHMRC Clinical Trials Centre, University of Sydney, Camperdown, Sydney, Australia
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Wang YH, Han YP, Yu HT, Pu XP, Du GH. Protocatechualdehyde prevents methylglyoxal-induced mitochondrial dysfunction and AGEs-RAGE axis activation in Human lens epithelial cells. Eur J Pharmacol 2014; 738:374-83. [DOI: 10.1016/j.ejphar.2014.04.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 04/23/2014] [Accepted: 04/27/2014] [Indexed: 12/17/2022]
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Hirano T, Iesato Y, Toriyama Y, Imai A, Chiba D, Murata T. Correlation between diabetic retinopathy severity and elevated skin autofluorescence as a marker of advanced glycation end-product accumulation in type 2 diabetic patients. J Diabetes Complications 2014; 28:729-34. [PMID: 24795072 DOI: 10.1016/j.jdiacomp.2014.03.003] [Citation(s) in RCA: 23] [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: 12/23/2013] [Revised: 02/18/2014] [Accepted: 03/03/2014] [Indexed: 01/16/2023]
Abstract
AIMS We evaluated skin autofluorescence (AF) as a marker of tissue advanced glycation end-product (AGE) accumulation and examined whether it was related to the prevalence and severity of diabetic retinopathy (DR) and of diabetic macular edema (DME) in patients with type 2 diabetes mellitus (DM). METHODS This study included 138 type 2 DM patients consisting of 31 patients with proliferative DR, 71 patients with non-proliferative DR, and 36 patients without retinopathy, in addition to 111 non-DM control subjects. At the time of skin AF and HbA1c measurement, self-assessed duration of DM was also determined. DR and DME stages were classified according to international guidelines. RESULTS Skin AF was significantly increased in patients with DM as compared with non-DM controls. Furthermore, skin AF was correlated with the severity of DR, whereas single measurement of HbA1c and self-assessed DM duration were not. None of these 3 factors showed a correlation with DME prevalence or severity. CONCLUSIONS Skin AF levels, which can be measured non-invasively on a screening basis without skin biopsy or blood sampling, have a greater predictive ability for the presence and severity of DR than single measurement of HbA1c or self-assessed DM duration in patients with type 2 DM.
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Affiliation(s)
- Takao Hirano
- Department of Ophthalmology, Shinshu University School of Medicine, Matsumoto, Japan; Omachi Municipal General Hospital, Omachi, Japan
| | - Yasuhiro Iesato
- Department of Ophthalmology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Yuichi Toriyama
- Department of Ophthalmology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Akira Imai
- Department of Ophthalmology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Dai Chiba
- Department of Ophthalmology, Shinshu University School of Medicine, Matsumoto, Japan; Omachi Municipal General Hospital, Omachi, Japan
| | - Toshinori Murata
- Department of Ophthalmology, Shinshu University School of Medicine, Matsumoto, Japan.
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Kerkeni M, Weiss IS, Jaisson S, Dandana A, Addad F, Gillery P, Hammami M. Increased serum concentrations of pentosidine are related to presence and severity of coronary artery disease. Thromb Res 2014; 134:633-8. [PMID: 25065554 DOI: 10.1016/j.thromres.2014.07.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 05/26/2014] [Accepted: 07/03/2014] [Indexed: 11/18/2022]
Abstract
BACKGROUND There are limited data regarding the contribution of advanced glycation end products (AGEs) in the presence of coronary artery disease (CAD). We investigated whether serum pentosidine and Nε-carboxymethyllysine (CML) were related to the presence and the severity of CAD. METHODS 69 Tunisian patients with CAD (≥ 50% obstruction in ≥ 1 coronary artery), 32 Tunisian patients without CAD but with potential cardiovascular risk factors and 60 Tunisian control subjects were included in a cross-sectional study. Patients were classified as CAD and non CAD patients according to angiographic results. The severity of CAD was assessed using the Gensini score. Serum pentosidine and CML were measured by LC-MS/MS. RESULTS Serum pentosidine and CML concentrations were significantly higher in non-CAD patients vs control subjects (P<0.001). Serum pentosidine concentrations were significantly higher in CAD patients vs non-CAD patients (P<0.001). A multiple logistic regression analysis demonstrated that pentosidine was independently associated with the presence of CAD (OR=1.52, 95% CI: 1.12-2.07, P=0.007). The area under curve (AUC) determined by ROC analysis was 0.74 (95% CI: 0.64-0.84, P<0.001) and the optimal cut-off value of pentosidine to predict the presence of CAD was 3.2 μmol/mol Lys, with 64% sensitivity and 78% specificity. Furthermore, in a multivariate stepwise regression analysis, pentosidine was independently correlated with Gensini score (standardized β= 0.46, 95% CI: 0.70-1.99, P<0.001). CONCLUSIONS High concentrations of pentosidine show the presence and the severity of CAD with high sensitivity.
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Affiliation(s)
- Mohsen Kerkeni
- Laboratory of Biochemistry, LR12ES05, Faculty of Medicine, University of Monastir, Tunisia.
| | - Izabella Santos Weiss
- Laboratory of Paediatric Biology and Research, American Memorial Hospital, University Hospital of Reims, Faculty of Medicine, Reims, France; Laboratory of Biochemistry and Molecular Biology, UMR CNRS/URCA n°7369, Faculty of Medicine, Reims, France
| | - Stephane Jaisson
- Laboratory of Paediatric Biology and Research, American Memorial Hospital, University Hospital of Reims, Faculty of Medicine, Reims, France; Laboratory of Biochemistry and Molecular Biology, UMR CNRS/URCA n°7369, Faculty of Medicine, Reims, France
| | - Azza Dandana
- Laboratory of Biochemistry, CHU-Farhat Hached, Sousse, Tunisia
| | - Faouzi Addad
- Department of Cardiology-University Hopital A. Mami, Ariana, Tunisia
| | - Philippe Gillery
- Laboratory of Paediatric Biology and Research, American Memorial Hospital, University Hospital of Reims, Faculty of Medicine, Reims, France; Laboratory of Biochemistry and Molecular Biology, UMR CNRS/URCA n°7369, Faculty of Medicine, Reims, France
| | - Mohamed Hammami
- Laboratory of Biochemistry, LR12ES05, Faculty of Medicine, University of Monastir, Tunisia
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Manigrasso MB, Juranek J, Ramasamy R, Schmidt AM. Unlocking the biology of RAGE in diabetic microvascular complications. Trends Endocrinol Metab 2014; 25:15-22. [PMID: 24011512 PMCID: PMC3877224 DOI: 10.1016/j.tem.2013.08.002] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 08/05/2013] [Accepted: 08/08/2013] [Indexed: 02/08/2023]
Abstract
The discovery of the receptor for advanced glycation end-products (RAGE) set the stage for the elucidation of important mechanisms underpinning diabetic complications. RAGE transduces the signals of advanced glycation end-products (AGEs), proinflammatory S100/calgranulins, and high mobility group box 1 (HMGB1), and is a one of a family of receptors for lysophosphatidic acid (LPA). These ligand tales weave a theme of vascular perturbation and inflammation linked to the pathogenesis of the chronic complications of diabetes. Once deemed implausible, this concept of inflammatory cues participating in diabetic complications is now supported by a plethora of experimental evidence in the macro- and microvasculature. We review the biology of ligand-RAGE signal transduction and its roles in diabetic microvascular complications, from animal models to human subjects.
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Affiliation(s)
- Michaele B Manigrasso
- Diabetes Research Program, Division of Endocrinology, New York University School of Medicine, 550 First Avenue, New York, NY 10016, USA
| | - Judyta Juranek
- Diabetes Research Program, Division of Endocrinology, New York University School of Medicine, 550 First Avenue, New York, NY 10016, USA
| | - Ravichandran Ramasamy
- Diabetes Research Program, Division of Endocrinology, New York University School of Medicine, 550 First Avenue, New York, NY 10016, USA
| | - Ann Marie Schmidt
- Diabetes Research Program, Division of Endocrinology, New York University School of Medicine, 550 First Avenue, New York, NY 10016, USA.
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Zorena K, Raczyńska D, Raczyńska K. Biomarkers in diabetic retinopathy and the therapeutic implications. Mediators Inflamm 2013; 2013:193604. [PMID: 24311895 PMCID: PMC3839118 DOI: 10.1155/2013/193604] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 09/09/2013] [Indexed: 02/06/2023] Open
Abstract
The main problem both in type 1 (T1DM) and type 2 (T2DM) diabetes is the development of chronic vascular complications encompassing micro- as well as macrocirculation. Chronic complications lower the quality of life, lead to disability, and are the cause of premature death in DM patients. One of the chronic vascular complications is a diabetic retinopathy (DR) which leads to a complete loss of sight in DM patients. Recent trials show that the primary cause of diabetic retinopathy is retinal neovascularization caused by disequilibrium between pro- and antiangiogenic factors. Gaining knowledge of the mechanisms of action of factors influencing retinal neovascularization as well as the search for new, effective treatment methods, especially in advanced stages of DR, puts special importance on research concentrating on the implementation of biological drugs in DR therapy. At present, it is antivascular endothelial growth factor and antitumor necrosis factor that gain particular significance.
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Affiliation(s)
- Katarzyna Zorena
- Department of Clinical and Experimental Endocrinology, Institute of Maritime and Tropical Medicine, Medical University of Gdańsk, Powstania Styczniowego 9b, 81-519 Gdynia, Poland
| | - Dorota Raczyńska
- Department of Anesthesiology and Intensive Care Medicine, Medical University of Gdańsk, Poland
- Department and Clinic of Ophthalmology, Medical University of Gdańsk, Poland
| | - Krystyna Raczyńska
- Department and Clinic of Ophthalmology, Medical University of Gdańsk, Poland
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Gillery P, Jaisson S. Usefulness of non-enzymatic post-translational modification derived products (PTMDPs) as biomarkers of chronic diseases. J Proteomics 2013; 92:228-38. [PMID: 23459210 DOI: 10.1016/j.jprot.2013.02.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Revised: 02/07/2013] [Accepted: 02/10/2013] [Indexed: 12/12/2022]
Abstract
Molecular aging of proteins results from the complex association of different reactions that lead to the progressive alteration of their structural and functional properties. These reactions, which include oxidation, glycoxidation, carbonylation and carbamylation, occur during aging and are amplified in various chronic diseases such as diabetes or chronic renal failure. Specific compounds generated throughout this process called post-translational modification derived products (PTMDPs) have been suggested to be promising biomarkers for the management of chronic diseases. During the last decades, the emergence of mass spectrometry and proteomics has largely contributed to the development of sensitive and specific analytical methods devoted to PTMDP quantification in biological fluids. This review aimed at providing evidences for the clinical relevance of PTMDPs as biomarkers in chronic diseases, and at emphasizing on the contribution of mass spectrometric and proteomic methods in this field. Different issues that should be addressed in order to ensure the implementation of these biomarkers in clinical practice have been highlighted. This article is part of a Special Issue entitled: Posttranslational Protein modifications in biology and Medicine.
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Affiliation(s)
- Philippe Gillery
- Laboratory of Pediatric Biology and Research, American Memorial Hospital, University Hospital of Reims, France; Laboratory of Biochemistry and Molecular Biology, FRE CNRS/URCA n°3481, Faculty of Medicine, Reims, France.
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