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Zgutka K, Tkacz M, Tomasiak P, Tarnowski M. A Role for Advanced Glycation End Products in Molecular Ageing. Int J Mol Sci 2023; 24:9881. [PMID: 37373042 PMCID: PMC10298716 DOI: 10.3390/ijms24129881] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/02/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Ageing is a composite process that involves numerous changes at the cellular, tissue, organ and whole-body levels. These changes result in decreased functioning of the organism and the development of certain conditions, which ultimately lead to an increased risk of death. Advanced glycation end products (AGEs) are a family of compounds with a diverse chemical nature. They are the products of non-enzymatic reactions between reducing sugars and proteins, lipids or nucleic acids and are synthesised in high amounts in both physiological and pathological conditions. Accumulation of these molecules increases the level of damage to tissue/organs structures (immune elements, connective tissue, brain, pancreatic beta cells, nephrons, and muscles), which consequently triggers the development of age-related diseases, such as diabetes mellitus, neurodegeneration, and cardiovascular and kidney disorders. Irrespective of the role of AGEs in the initiation or progression of chronic disorders, a reduction in their levels would certainly provide health benefits. In this review, we provide an overview of the role of AGEs in these areas. Moreover, we provide examples of lifestyle interventions, such as caloric restriction or physical activities, that may modulate AGE formation and accumulation and help to promote healthy ageing.
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Affiliation(s)
- Katarzyna Zgutka
- Department of Physiology in Health Sciences, Faculty of Health Sciences, Pomeranian Medical University, Żołnierska 54, 70-210 Szczecin, Poland
| | - Marta Tkacz
- Department of Physiology in Health Sciences, Faculty of Health Sciences, Pomeranian Medical University, Żołnierska 54, 70-210 Szczecin, Poland
| | - Patrycja Tomasiak
- Institute of Physical Culture Sciences, University of Szczecin, 70-453 Szczecin, Poland
| | - Maciej Tarnowski
- Department of Physiology in Health Sciences, Faculty of Health Sciences, Pomeranian Medical University, Żołnierska 54, 70-210 Szczecin, Poland
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2
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Ji Z, Wang J, Yang S, Tao S, Shen C, Wei H, Li Q, Jin P. Graphene oxide accelerates diabetic wound repair by inhibiting apoptosis of Ad-MSCs via Linc00324/miR-7977/STK4 pathway. FASEB J 2022; 36:e22623. [PMID: 36269304 DOI: 10.1096/fj.202201079rr] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/24/2022] [Accepted: 10/10/2022] [Indexed: 11/11/2022]
Abstract
Many studies have shown that graphene oxide (GO) promotes proliferation and differentiation of a variety of stem cells. However, its effect on adipose-derived mesenchymal stem cell (Ad-MSCs) apoptosis is still unclear. Apoptosis is a significant factor affecting stem cell-based treatment of diabetic wounds. Therefore, we explored the effect of GO on Ad-MSC apoptosis and diabetic wound healing. In this study, qRT-PCR was used to detect Ad-MSC expression of LncRNAs, miRNAs, and mRNAs under high-glucose environment. RNA immunoprecipitation (RIP), RNA pull-down, and luciferase assays were used to detect interactions of specific lncRNAs, miRNAs, and mRNAs. The effects of GO on Ad-MSC apoptosis were explored by flow cytometry, TUNEL assay, and Western blot. A diabetic wound model was used to explore the function of Linc00324 on Ad-MSC reparative properties in vivo. As a result, GO inhibited high glucose-induced apoptosis in Ad-MSCs, and Linc00324 contributed to the anti-apoptotic effect of GO. RIP and RNA pull-down confirmed that Linc00324 directly interacted with miR-7977, functioning as a miRNA sponge to regulate expression of the miR-7977 target gene STK4 (MST1) and downstream signaling pathways. In addition, GO reduced the apoptosis of Ad-MSCs in wounds and promoted wound healing. Taken together, these findings suggest GO may be a superior auxiliary material for Ad-MSCs to facilitate diabetic wound healing via the Linc00324/miR-7977/STK4 pathway.
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Affiliation(s)
- Zhe Ji
- Department of Plastic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, P.R. China
| | - Jian Wang
- Department of Plastic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, P.R. China
| | - Shuai Yang
- Department of Plastic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, P.R. China
| | - Shengjun Tao
- Department of Plastic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, P.R. China
| | - Caiqi Shen
- Department of Plastic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, P.R. China
| | - Hanxiao Wei
- Department of Plastic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, P.R. China
| | - Qiang Li
- Department of Plastic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, P.R. China
| | - Peisheng Jin
- Department of Plastic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, P.R. China.,Jiangsu Center for the Collaboration and Innovation of Cancer, Xuzhou Medical University, Xuzhou, P.R. China.,Jiangsu Cancer Biotherapy Institute, Xuzhou Medical University, Xuzhou, P.R. China
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3
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Sharifiaghdam M, Shaabani E, Sharifiaghdam Z, De Keersmaecker H, Lucas B, Lammens J, Ghanbari H, Teimoori-Toolabi L, Vervaet C, De Beer T, Faridi-Majidi R, De Smedt SC, Braeckmans K, Fraire JC. Macrophage reprogramming into a pro-healing phenotype by siRNA delivered with LBL assembled nanocomplexes for wound healing applications. NANOSCALE 2021; 13:15445-15463. [PMID: 34505619 DOI: 10.1039/d1nr03830c] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Excessive inflammatory responses in wounds are characterized by the presence of high levels of pro-inflammatory M1 macrophages rather than pro-healing M2 macrophages, which leads to delayed wound healing. Macrophage reprogramming from the M1 to M2 phenotype through knockdown of interferon regulatory factor 5 (irf5) has emerged as a possible therapeutic strategy. While downregulation of irf5 could be achieved by siRNA, it very much depends on successful intracellular delivery by suitable siRNA carriers. Here, we report on highly stable selenium-based layer-by-layer (LBL) nanocomplexes (NCs) for siRNA delivery with polyethyleneimine (PEI-LBL-NCs) as the final polymer layer. PEI-LBL-NCs showed good protection of siRNA with only 40% siRNA release in a buffer of pH = 8.5 after 72 h or in simulated wound fluid after 4 h. PEI-LBL-NCs also proved to be able to transfect RAW 264.7 cells with irf5-siRNA, resulting in successful reprogramming to the M2 phenotype as evidenced by a 3.4 and 2.6 times decrease in NOS-2 and TNF-α mRNA expression levels, respectively. Moreover, irf5-siRNA transfected cells exhibited a 2.5 times increase of the healing mediator Arg-1 and a 64% increase in expression of the M2 cell surface marker CD206+. Incubation of fibroblast cells with conditioned medium isolated from irf5-siRNA transfected RAW 264.7 cells resulted in accelerated wound healing in an in vitro scratch assay. These results show that irf5-siRNA loaded PEI-LBL-NCs are a promising therapeutic approach to tune macrophage polarization for improved wound healing.
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Affiliation(s)
- Maryam Sharifiaghdam
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ghent, B-9000, Belgium.
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| | - Elnaz Shaabani
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ghent, B-9000, Belgium.
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| | - Zeynab Sharifiaghdam
- Department of Physiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Herlinde De Keersmaecker
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ghent, B-9000, Belgium.
- Center for Advanced Light Microscopy, Ghent University, 9000 Ghent, Belgium
| | - Bart Lucas
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ghent, B-9000, Belgium.
| | - Joris Lammens
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Hossein Ghanbari
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| | | | - Chris Vervaet
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Thomas De Beer
- Laboratory of Pharmaceutical Process Analytical Technology (LPPAT), Department of Pharmaceutical Analysis, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Reza Faridi-Majidi
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| | - Stefaan C De Smedt
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ghent, B-9000, Belgium.
| | - Kevin Braeckmans
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ghent, B-9000, Belgium.
- Center for Advanced Light Microscopy, Ghent University, 9000 Ghent, Belgium
| | - Juan C Fraire
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ghent, B-9000, Belgium.
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Cao X, Li B, Han X, Zhang X, Dang M, Wang H, Du F, Zeng X, Guo C. Soluble receptor for advanced glycation end-products promotes angiogenesis through activation of STAT3 in myocardial ischemia/reperfusion injury. Apoptosis 2021; 25:341-353. [PMID: 32333220 DOI: 10.1007/s10495-020-01602-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Soluble receptor for advanced glycation end-products (sRAGE), which exerts cardioprotective effect through inhibiting cardiomyocyte apoptosis and autophagy during ischemia/reperfusion (I/R) injury, is also known to enhance angiogenesis in post-ischemic reperfusion injury-critical limb ischemia (PIRI-CLI) mice. However, whether sRAGE protects the heart from myocardial I/R injury via promoting angiogenesis remains unclear. Myocardial model of I/R injury was conducted by left anterior descending (LAD) ligation for 30 min and reperfusion for 2 weeks in C57BL/6 mice. And I/R injury in cardiac microvascular endothelial cells (CMECs) was duplicated by oxygen and glucose deprivation. The results showed that I/R-induced cardiac dysfunction, inflammation and myocardial fibrosis were all reversed by sRAGE. CD31 immunohistochemistry staining showed that sRAGE increased the density of vessels after I/R injury. The results from cultured CMECs showed that sRAGE inhibited apoptosis and increased proliferation, migration, angiogenesis after exposure to I/R. These effects were dependent on signal transducer and activator of transcription 3 (STAT3) pathway. Together, the present study demonstrated that activation of STAT3 contributed to the protective effects of sRAGE on myocardial I/R injury via promoting angiogenesis.
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Affiliation(s)
- Xianxian Cao
- Department of Cardiology, Beijing Tiantan Hospital, Capital Medical University, No. 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, People's Republic of China
| | - Bin Li
- Department of Physiology and Pathophysiology, Capital Medical University, No. 10 You An Men Wai Xi Tou Tiao, Fengtai District, Beijing, 100069, People's Republic of China
| | - Xuejie Han
- Department of Cardiology, Beijing Tiantan Hospital, Capital Medical University, No. 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, People's Republic of China
| | - Xiuling Zhang
- Department of Cardiology, Beijing Tiantan Hospital, Capital Medical University, No. 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, People's Republic of China
| | - Mengqiu Dang
- Department of Cardiology, Beijing Tiantan Hospital, Capital Medical University, No. 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, People's Republic of China
| | - Hongxia Wang
- Department of Physiology and Pathophysiology, Capital Medical University, No. 10 You An Men Wai Xi Tou Tiao, Fengtai District, Beijing, 100069, People's Republic of China
| | - Fenghe Du
- Department of Cardiology, Beijing Tiantan Hospital, Capital Medical University, No. 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, People's Republic of China.,Department of Geriatrics, Beijing Tiantan Hospital, Capital Medical University, No. 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, People's Republic of China
| | - Xiangjun Zeng
- Department of Physiology and Pathophysiology, Capital Medical University, No. 10 You An Men Wai Xi Tou Tiao, Fengtai District, Beijing, 100069, People's Republic of China.
| | - Caixia Guo
- Department of Cardiology, Beijing Tiantan Hospital, Capital Medical University, No. 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, People's Republic of China. .,Clinical Trial Center, Beijing Tiantan Hospital, National Clinical Trial Institution, Capital Medical University, No. 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, People's Republic of China.
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Involvement of RAGE and Oxidative Stress in Inflammatory and Infectious Skin Diseases. Antioxidants (Basel) 2021; 10:antiox10010082. [PMID: 33435332 PMCID: PMC7827747 DOI: 10.3390/antiox10010082] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/24/2020] [Accepted: 01/06/2021] [Indexed: 12/20/2022] Open
Abstract
The surface receptor for advanced glycosylation end-products (RAGE) and its soluble (sRAGE) and endogenous secretory (EN-RAGE) forms belong to the superfamily of toll-like receptors and play important roles in inflammation and autoimmunity, directly or through binding with advanced glycosylation end-products (AGE) and advanced oxidation protein products (AOPP). We reviewed the literature on the role of RAGE in skin diseases. Research in this field is still rather limited (28 articles) but suggests the involvement of RAGE and RAGE-related pathways in chronic inflammatory diseases (lupus, psoriasis, atopic dermatitis, and lichen planus), infectious diseases (leprosy, Staphylococcus aureus-induced skin lesions), alterations of the repairing processes in diabetic skin, systemic sclerosis, and ulcers. These data prompt further research in this field, which not only will be useful to better understand the pathogenetic mechanisms of diseases, but is also likely to have intriguing clinical implications. Indeed, when their role in the complex and multifactorial inflammatory balance will be adequately defined, RAGE and related molecules could be used as markers of disease severity and/or response to treatment. Moreover, future promising therapeutic perspectives could be topical administration of some of these molecules (e.g., sRAGE) to modulate local inflammatory response and/or the development of anti-RAGE antibodies for systemic treatment.
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Jiang X, Meng W, Li L, Meng Z, Wang D. Adjuvant Therapy With Mushroom Polysaccharides for Diabetic Complications. Front Pharmacol 2020; 11:168. [PMID: 32180724 PMCID: PMC7059129 DOI: 10.3389/fphar.2020.00168] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 02/07/2020] [Indexed: 12/11/2022] Open
Abstract
Background Diabetic complications seriously endanger the health of most diabetic patients around the world. Most chemical hypoglycemic agents have adverse effects and are unable to improve the progression of diabetic complications. In recent years, a number of medicinal herbs have become increasingly popular for the treatment of diabetic complications due to their relative safety. Polysaccharides extracted from medicinal herbs with multiple pharmacological activities and low toxicity have been reported to be useful in the treatment of diabetic complications. Methods Primary studies with keywords including polysaccharide and diabetic complications were retrieved from the Web of Science and NCBI databases and were read and analyzed. Results Mushroom polysaccharides were proven to have positive effects on diabetic complications. Conclusions We studied the effects of mushroom polysaccharides on hyperglycemia and as adjuvant therapies for diabetic complications and summarized the applications and limitations of mushroom polysaccharides to better understand their application for the treatment of diabetic complications.
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Affiliation(s)
- Xue Jiang
- Department of Translational Medicine Research Institute, First Hospital, Jilin University, Changchun, China.,School of Life Sciences, Jilin University, Changchun, China
| | - Weiqi Meng
- School of Life Sciences, Jilin University, Changchun, China
| | - Lanzhou Li
- School of Life Sciences, Jilin University, Changchun, China
| | - Zhaoli Meng
- Department of Translational Medicine Research Institute, First Hospital, Jilin University, Changchun, China
| | - Di Wang
- School of Life Sciences, Jilin University, Changchun, China
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7
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Le Bagge S, Fotheringham AK, Leung SS, Forbes JM. Targeting the receptor for advanced glycation end products (RAGE) in type 1 diabetes. Med Res Rev 2020; 40:1200-1219. [PMID: 32112452 DOI: 10.1002/med.21654] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/09/2019] [Accepted: 11/12/2019] [Indexed: 12/18/2022]
Abstract
Type 1 diabetes (T1D) is one of the most common chronic diseases manifesting in early life, with the prevalence increasing worldwide at a rate of approximately 3% per annum. The prolonged hyperglycaemia characteristic of T1D upregulates the receptor for advanced glycation end products (RAGE) and accelerates the formation of RAGE ligands, including advanced glycation end products, high-mobility group protein B1, S100 calcium-binding proteins, and amyloid-beta. Interestingly, changes in the expression of RAGE and these ligands are evident in patients before the onset of T1D. RAGE signals via various proinflammatory cascades, resulting in the production of reactive oxygen species and cytokines. A large number of proinflammatory ligands that can signal via RAGE have been implicated in several chronic diseases, including T1D. Therefore, it is unsurprising that RAGE has become a potential therapeutic target for the treatment and prevention of disease. In this review, we will explore how RAGE might be targeted to prevent the development of T1D.
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Affiliation(s)
- Selena Le Bagge
- Glycation and Diabetes, Translational Research Institute (TRI), Mater Research Institute-The University of Queensland (MRI-UQ), Brisbane, Queensland, Australia.,School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Amelia K Fotheringham
- Glycation and Diabetes, Translational Research Institute (TRI), Mater Research Institute-The University of Queensland (MRI-UQ), Brisbane, Queensland, Australia.,School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Sherman S Leung
- Glycation and Diabetes, Translational Research Institute (TRI), Mater Research Institute-The University of Queensland (MRI-UQ), Brisbane, Queensland, Australia.,School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Josephine M Forbes
- Glycation and Diabetes, Translational Research Institute (TRI), Mater Research Institute-The University of Queensland (MRI-UQ), Brisbane, Queensland, Australia.,Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Mater Clinical School, The University of Queensland, Brisbane, Queensland, Australia
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8
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Blockade of receptor for advanced glycation end products improved essential response of inflammation in diabetic wound healing. Int J Diabetes Dev Ctries 2019. [DOI: 10.1007/s13410-019-00778-3] [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: 10/25/2022] Open
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Extracorporal Shock Wave Therapy Enhances Receptor for Advanced Glycated End-Product-Dependent Flap Survival and Angiogenesis. Ann Plast Surg 2019; 80:424-431. [PMID: 29309329 DOI: 10.1097/sap.0000000000001279] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND/OBJECTIVES Loss of skin flaps due to deteriorated wound healing is a crucial clinical issue. Extracorporal shock wave therapy (ESWT) promotes flap healing by inducing angiogenesis and suppressing inflammation. The receptor for advanced glycation end-products (RAGEs) was identified to play a pivotal role in wound healing. However, to date, the role of RAGE in skin flaps and its interference with ESWT are unknown. METHODS Caudally pedicled musculocutanous skin flaps in RAGE and wt mice were treated with low-dose extracorporal shock waves (s-RAGE, s-wt) and analyzed for flap survival, histomorphologic studies, and immunohistochemistry during a 10-day period. Animals without ESWT served in each genotype as a control group (c-RAGE, c-wt). Statistical analysis was carried out by repeated-measures analysis of variance. RESULTS Flap necrosis was significantly reduced after ESWT in wt animals but increased in RAGE-deficient animals. Morphometric differences between the 4 groups were identified and showed a delayed wound healing with dysregulated inflammatory cells and deteriorated angiogenesis in RAGE animals. Furthermore, spatial and temporal differences were observed. CONCLUSIONS The RAGE controls inflammation and angiogenesis in flap healing. The protective effects of ESWT are dependent on intact RAGE signaling, which enables temporary targeted infiltration of immune cells and neoangiogenesis.
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Walker A, Nissen E, Geiger A. Migratory, metabolic and functional alterations of fibrocytes in type 2 diabetes. IUBMB Life 2018; 70:1122-1132. [PMID: 30184318 DOI: 10.1002/iub.1920] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 07/03/2018] [Accepted: 07/05/2018] [Indexed: 12/16/2022]
Abstract
Fibrocytes are bloodborne mesenchymal progenitor cells that are recruited to injured tissue sites and contribute to the repair process by acquiring a myofibroblast-like phenotype and producing extracellular matrix components and growth factors. Treatment with normal fibrocytes or their exosomes restores the ability of genetically diabetic mice to heal skin wounds, suggesting the existence of dysfunctional alterations in diabetic fibrocytes. This study compared the migratory, metabolic and functional characteristics of fibrocytes from patients with type 2 diabetes (T2DPs) and healthy controls (HCs). It was found that the frequency of these cells was abnormally low in the peripheral blood of T2DPs. Diabetic fibrocytes showed reduced expression of the C-X-C motif and C-C motif chemokine receptors (CXCR)4, (CCR)5, and CCR7, and demonstrated reduced migration in response to their ligands (CXCL)12, (CCL)5, and CCL21. They exhibited increased expression of the receptor for advanced glycation end product, suppression of the alternative AGE receptor 1, increased intracellular concentrations of AGEs, decreased expression of sirtuin-1 and elevated oxidative stress. In short-term cultures, fibrocytes from T2DPs released larger amounts of proinflammatory cytokines than those from HCs. Unlike normal fibrocytes, diabetic fibrocytes did not exhibit increased expression of type I collagen and α-smooth muscle actin on stimulation with transforming growth factor (TGF)-β1 and this abnormal response was associated with downregulation of TGF-β1 type II receptor on the cell surface. Study findings uncover multiple migratory and functional alterations of diabetic fibrocytes that may contribute to explain why T2DPs experience impaired wound healing and chronic ulcers. © 2018 IUBMB Life, 70(11):1122-1132, 2018.
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Affiliation(s)
- Audrey Walker
- Proteomics & Metabolomics Laboratory, DreiRosen Pharma GmbH, Berlin, Germany
| | - Erwin Nissen
- Proteomics & Metabolomics Laboratory, DreiRosen Pharma GmbH, Berlin, Germany
| | - Adolf Geiger
- Technology Development, DreiRosen Pharma GmbH, Berlin, Germany
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Dewanjee S, Das S, Das AK, Bhattacharjee N, Dihingia A, Dua TK, Kalita J, Manna P. Molecular mechanism of diabetic neuropathy and its pharmacotherapeutic targets. Eur J Pharmacol 2018; 833:472-523. [DOI: 10.1016/j.ejphar.2018.06.034] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 06/15/2018] [Accepted: 06/26/2018] [Indexed: 02/07/2023]
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12
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Targeting Oxidative Stress and Mitochondrial Dysfunction in the Treatment of Impaired Wound Healing: A Systematic Review. Antioxidants (Basel) 2018; 7:antiox7080098. [PMID: 30042332 PMCID: PMC6115926 DOI: 10.3390/antiox7080098] [Citation(s) in RCA: 244] [Impact Index Per Article: 40.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 07/10/2018] [Accepted: 07/20/2018] [Indexed: 01/13/2023] Open
Abstract
Wound healing is a well-tuned biological process, which is achieved via consecutive and overlapping phases including hemostasis, inflammatory-related events, cell proliferation and tissue remodeling. Several factors can impair wound healing such as oxygenation defects, aging, and stress as well as deleterious health conditions such as infection, diabetes, alcohol overuse, smoking and impaired nutritional status. Growing evidence suggests that reactive oxygen species (ROS) are crucial regulators of several phases of healing processes. ROS are centrally involved in all wound healing processes as low concentrations of ROS generation are required for the fight against invading microorganisms and cell survival signaling. Excessive production of ROS or impaired ROS detoxification causes oxidative damage, which is the main cause of non-healing chronic wounds. In this context, experimental and clinical studies have revealed that antioxidant and anti-inflammatory strategies have proven beneficial in the non-healing state. Among available antioxidant strategies, treatments using mitochondrial-targeted antioxidants are of particular interest. Specifically, mitochondrial-targeted peptides such as elamipretide have the potential to mitigate mitochondrial dysfunction and aberrant inflammatory response through activation of nucleotide-binding oligomerization domain (NOD)-like family receptors, such as the pyrin domain containing 3 (NLRP3) inflammasome, nuclear factor-kappa B (NF-κB) signaling pathway inhibition, and nuclear factor (erythroid-derived 2)-like 2 (Nrf2).
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Clinical and Biological Predictors of Plasma Levels of Soluble RAGE in Critically Ill Patients: Secondary Analysis of a Prospective Multicenter Observational Study. DISEASE MARKERS 2018; 2018:7849675. [PMID: 29861796 PMCID: PMC5971347 DOI: 10.1155/2018/7849675] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Accepted: 04/11/2018] [Indexed: 02/07/2023]
Abstract
Rationale Although soluble forms of the receptor for advanced glycation end products (RAGE) have been recently proposed as biomarkers in multiple acute or chronic diseases, few studies evaluated the influence of usual clinical and biological parameters, or of patient characteristics and comorbidities, on circulating levels of soluble RAGE in the intensive care unit (ICU) setting. Objectives To determine, among clinical and biological parameters that are usually recorded upon ICU admission, which variables, if any, could be associated with plasma levels of soluble RAGE. Methods Data for this ancillary study were prospectively obtained from adult patients with at least one ARDS risk factor upon ICU admission enrolled in a large multicenter observational study. At ICU admission, plasma levels of total soluble RAGE (sRAGE) and endogenous secretory (es)RAGE were measured by duplicate ELISA and baseline patient characteristics, comorbidities, and usual clinical and biological indices were recorded. After univariate analyses, significant variables were used in multivariate, multidimensional analyses. Measurements and Main Results 294 patients were included in this ancillary study, among whom 62% were admitted for medical reasons, including septic shock (11%), coma (11%), and pneumonia (6%). Although some variables were associated with plasma levels of RAGE soluble forms in univariate analysis, multidimensional analyses showed no significant association between admission parameters and baseline plasma sRAGE or esRAGE. Conclusions We found no obvious association between circulating levels of soluble RAGE and clinical and biological indices that are usually recorded upon ICU admission. This trial is registered with NCT02070536.
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Wang Q, Zhu G, Cao X, Dong J, Song F, Niu Y. Blocking AGE-RAGE Signaling Improved Functional Disorders of Macrophages in Diabetic Wound. J Diabetes Res 2017; 2017:1428537. [PMID: 29119117 PMCID: PMC5651124 DOI: 10.1155/2017/1428537] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Accepted: 08/17/2017] [Indexed: 11/21/2022] Open
Abstract
Advanced glycosylation end products (AGEs) accumulate in diabetic wounds. Interactions between AGEs and their receptor (RAGE) leads to dermatologic problems in diabetes. Macrophage, which plays important roles in wound healing, highly expresses RAGE. Therefore, we investigated whether RAGE-expressing macrophages might be responsible for impaired wound healing on diabetes. We used anti-RAGE antibody applied topically on diabetic wounds. After confirming that wound healing was improved in anti-RAGE antibody group compared with normal mice, our results showed that macrophages appeared insufficient in the early stage and fading away slowly in the later proliferative phase compared with the control group, which was ameliorated in anti-RAGE antibody-applied wounds. Blocking AGE-RAGE signaling also increased neutrophils phagocytized by macrophages and promoted the phenotypic switch of macrophages from proinflammatory to prohealing activities. In vitro, phagocytosis of THP-1 (M0) and lipopolysaccharide- (LPS-) induced (M1) macrophages was impaired by treatment with AGEs, while IL-4- and IL-13-induced (M2) macrophages was not. Finally, AGEs increased the proinflammatory response of M1 macrophages, while inhibiting the polarization and anti-inflammatory functions of M2 macrophages. In conclusion, inhibition of AGE-RAGE signaling improved functional disorders of macrophages in the early inflammatory phase, which promoted the healing of wounds in diabetic mice.
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Affiliation(s)
- Qi Wang
- Shanghai Burn Institute, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Guanya Zhu
- Shanghai Burn Institute, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaozan Cao
- Shanghai Burn Institute, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jiaoyun Dong
- Shanghai Burn Institute, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fei Song
- Shanghai Burn Institute, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yiwen Niu
- Shanghai Burn Institute, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Van Putte L, De Schrijver S, Moortgat P. The effects of advanced glycation end products (AGEs) on dermal wound healing and scar formation: a systematic review. Scars Burn Heal 2016; 2:2059513116676828. [PMID: 29799552 PMCID: PMC5965313 DOI: 10.1177/2059513116676828] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Introduction: With ageing, the skin gradually loses its youthful appearance and functions
like wound healing and scar formation. The pathophysiological theory of
Advanced Glycation End products (AGEs) has gained traction during the last
decade. This review aims to document the influence of AGEs on the mechanical
and physiologic properties of the skin, how they affect dermal wound healing
and scar formation in high-AGE populations like elderly patients and
diabetics, and potential therapeutic strategies. Methods: This systematic literature study involved a structured search in Pubmed and
Web of Science with qualitative analysis of 14 articles after a three-staged
selection process with the use of in- and exclusion criteria. Results: Overall, AGEs cause shortened, thinned, and disorganized collagen fibrils,
consequently reducing elasticity and skin/scar thickness with increased
contraction and delayed wound closure. Documented therapeutic strategies
include dietary AGE restriction, sRAGE decoy receptors, aminoguanidine,
RAGE-blocking antibodies, targeted therapy, thymosin β4, anti-oxidant agents
and gold nanoparticles, ethyl pyruvate, Gal-3 manipulation and
metformin. Discussion: With lack of evidence concerning scars, no definitive conclusions can yet be
made about the role of AGEs on possible appearance or function of scar
tissue. However, all results suggest that scars tend to be more rigid and
contractile with persistent redness and reduced tendency towards hypertrophy
as AGEs accumulate. Conclusion: Abundant evidence supports the pathologic role of AGEs in ageing and dermal
wound healing and the effectiveness of possible therapeutic agents. More
research is required to conclude its role in scar formation and scar
therapy. Our skin is the body’s first line of defense. It is the barrier that protects us
from chemical and biological threats such as viruses, bacteria or corrosive
liquids. It is the sensor that allows us to detect physical threats like extreme
temperatures, pressure and pain. And when these preventative measures fail, the
skin has yet another property: the ability to heal. Skin changes visibly with age, most notably with the appearance of wrinkles.
However, there is more to ageing than meets the eye; invisible alterations cause
the decline of various functions of the skin, such as wound healing and scar
formation. An array of non-conclusive research has been done in this field. One
theory that has gained traction during the last decade is the Advanced Glycation
End products (AGEs) theory. The theory states that AGEs play an important role
in skin aging, wound healing and the effectiveness of different therapeutic
options. Their presence supposedly indicates a diminished ability for wound
healing and scar formation. AGEs are proteins to which sugar molecule is bound. The sugar molecule inhibits
the original protein from functioning properly. As skin contains many proteins
like collagen, the formation of these AGEs could be a viable explanation for the
diminished functioning with ageing. In this review, we investigated whether the
accumulation of AGEs affects wound healing and scar formation. Normal scar formation results in a thin scar. However, it may happen that
scarring results in thick, large, painful and itchy scars. We investigated
whether people with a high AGE content in their skin, like diabetics and
elderly, have difficulties forming aesthetically pleasing scars. Secondly, we
investigated which therapies reduce the AGE content and, if so, whether these
therapies can improve wound healing and scarring. This literature study involved
research in scientific databases with qualitative analysis of 14 articles after
a three-staged selection process with the use of set criteria. We found the different ways in which AGEs affect skin properties and wound
healing. Collagen, one of the most important proteins in the skin, is affected
by these AGEs. Once a sugar binds to it, the collagen strings becomes thinner
and shorter, and the different collagen proteins cross-link with each other in
an unstructured way. The result of these alterations is a reduced elasticity,
i.e. the skin becomes stiffer. The scar will be thinner and the time for wounds
to close is longer. We also found strategies to diminish the AGE content,
including dietary AGE restriction and Metformin, a drug used in diabetes. We can conclude that there is proof of AGEs playing an important role in skin
ageing, wound healing and the effectiveness of different therapeutic options.
However, more research is required to conclude the exact role of AGEs in scar
formation and scar therapy.
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Affiliation(s)
- Lennert Van Putte
- Faculty of Medicine and Health Science, University of Antwerp, Antwerp, Belgium
| | - Sofie De Schrijver
- Faculty of Medicine and Health Science, University of Antwerp, Antwerp, Belgium
| | - Peter Moortgat
- Oscare, Organisation for Burns, Scar After-care and Research, Antwerp, Belgium
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Litwinoff E, Hurtado Del Pozo C, Ramasamy R, Schmidt AM. Emerging Targets for Therapeutic Development in Diabetes and Its Complications: The RAGE Signaling Pathway. Clin Pharmacol Ther 2015; 98:135-44. [PMID: 25974754 DOI: 10.1002/cpt.148] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 05/08/2015] [Accepted: 05/08/2015] [Indexed: 12/16/2022]
Abstract
Types 1 and 2 diabetes are on the rise worldwide. Although the treatment of hyperglycemia has benefited from recent advances, aggressive efforts to maintain euglycemia may be fraught with risk, especially in older subjects or in subjects vulnerable to hypoglycemic unawareness. Hence, strategies to prevent and treat the complications of hyperglycemia are essential. In this review we summarize recent updates on the biology of the receptor for advanced glycation endproducts (RAGE) in the pathogenesis of both micro- and macrovascular complications of diabetes, insights from the study of mouse models of obesity and diabetic complications, and from associative studies in human subjects. The study of the mechanisms and consequences of the interaction of the RAGE cytoplasmic domain with the formin, mDia1, in RAGE signal transduction, will be discussed. Lastly, we review the "state-of-the-art" on RAGE-directed therapeutics. Tackling RAGE/mDia1 may identify a novel class of therapeutics preventing diabetes and its complications.
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Affiliation(s)
- Ems Litwinoff
- Diabetes Research Program, Division of Endocrinology, Department of Medicine, New York University School of Medicine, New York, New York, USA
| | - C Hurtado Del Pozo
- Diabetes Research Program, Division of Endocrinology, Department of Medicine, New York University School of Medicine, New York, New York, USA
| | - R Ramasamy
- Diabetes Research Program, Division of Endocrinology, Department of Medicine, New York University School of Medicine, New York, New York, USA
| | - A M Schmidt
- Diabetes Research Program, Division of Endocrinology, Department of Medicine, New York University School of Medicine, New York, New York, USA
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Ndip A, Wilkinson FL, Jude EB, Boulton AJM, Alexander MY. RANKL-OPG and RAGE modulation in vascular calcification and diabetes: novel targets for therapy. Diabetologia 2014; 57:2251-60. [PMID: 25112376 DOI: 10.1007/s00125-014-3348-z] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 07/17/2014] [Indexed: 12/18/2022]
Abstract
Type 2 diabetes is associated with increased cardiovascular morbidity and mortality and early vascular ageing. This takes the form of atherosclerosis, with progressive vascular calcification being a major complication in the pathogenesis of this disease. Current research and drug targets in diabetes have hitherto focused on atherosclerosis, but vascular calcification is now recognised as an independent predictor of cardiovascular morbidity and mortality. An emerging regulatory pathway for vascular calcification in diabetes involves the receptor activator for nuclear factor κB (RANK), RANK ligand (RANKL) and osteoprotegerin (OPG). Important novel biomarkers of calcification are related to levels of glycation and inflammation in diabetes. Several therapeutic strategies could have advantageous effects on the vasculature in patients with diabetes, including targeting the RANKL and receptor for AGE (RAGE) signalling pathways, since there has been little success-at least in macrovascular outcomes-with conventional glucose-lowering therapy. There is substantial and relevant clinical and basic science evidence to suggest that modulating RANKL-RANK-OPG signalling, RAGE signalling and the associated proinflammatory milieu alters the natural course of cardiovascular complications and outcomes in people with diabetes. However, further research is critically needed to understand the precise mechanisms underpinning these pathways, in order to translate the anti-calcification strategies into patient benefit.
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Affiliation(s)
- Agbor Ndip
- Department of Medicine and Diabetes, Manchester Royal Infirmary, Manchester, UK,
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18
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Chen SA, Chen HM, Yao YD, Hung CF, Tu CS, Liang YJ. Topical treatment with anti-oxidants and Au nanoparticles promote healing of diabetic wound through receptor for advance glycation end-products. Eur J Pharm Sci 2012; 47:875-83. [DOI: 10.1016/j.ejps.2012.08.018] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 08/29/2012] [Accepted: 08/30/2012] [Indexed: 01/06/2023]
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19
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Guo WA, Knight PR, Raghavendran K. The receptor for advanced glycation end products and acute lung injury/acute respiratory distress syndrome. Intensive Care Med 2012; 38:1588-98. [DOI: 10.1007/s00134-012-2624-y] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Accepted: 06/04/2012] [Indexed: 01/10/2023]
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20
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Arumugam T, Ramachandran V, Gomez SB, Schmidt AM, Logsdon CD. S100P-derived RAGE antagonistic peptide reduces tumor growth and metastasis. Clin Cancer Res 2012; 18:4356-64. [PMID: 22718861 DOI: 10.1158/1078-0432.ccr-12-0221] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
PURPOSE The receptor for advanced glycation end products (RAGE) contributes to multiple pathologies, including diabetes, arthritis, neurodegenerative diseases, and cancer. Despite the obvious need, no RAGE inhibitors are in common clinical use. Therefore, we developed a novel small RAGE antagonist peptide (RAP) that blocks activation by multiple ligands. EXPERIMENTAL DESIGN RAGE and its ligands were visualized by immunohistochemical analysis of human pancreatic tissues, and siRNA was used to analyze their functions. Interactions between RAGE and S100P, S100A4, and HMGB-1 were measured by ELISA. Three S100P-derived small antagonistic peptides were designed, synthesized, and tested for inhibition of RAGE binding. The effects of the peptide blockers on NFκB-luciferase reporter activity was used to assess effects on RAGE-mediated signaling. The most effective peptide was tested on glioma and pancreatic ductal adenocarcinoma (PDAC) models. RESULTS Immunohistochemical analysis confirmed the expression of RAGE and its ligands S100P, S100A4, and HMGB-1 in human PDAC. siRNA silencing of RAGE or its ligands reduced the growth and migration of PDAC cells in vitro. The most effective RAP inhibited the interaction of S100P, S100A4, and HMGB-1 with RAGE at micromolar concentrations. RAP also reduced the ability of the ligands to stimulate RAGE activation of NFκB in cancer cells in vitro and in vivo. Importantly, systemic in vivo administration of RAP reduced the growth and metastasis of pancreatic tumors and also inhibited glioma tumor growth. CONCLUSION RAP shows promise as a tool for the investigation of RAGE function and as an in vivo treatment for RAGE-related disorders.
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Affiliation(s)
- Thiruvengadam Arumugam
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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21
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Ramasamy R, Yan SF, Schmidt AM. Receptor for AGE (RAGE): signaling mechanisms in the pathogenesis of diabetes and its complications. Ann N Y Acad Sci 2012; 1243:88-102. [PMID: 22211895 DOI: 10.1111/j.1749-6632.2011.06320.x] [Citation(s) in RCA: 342] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The receptor for advanced glycation endproducts (RAGE) was first described as a signal transduction receptor for advanced glycation endproducts (AGEs), the products of nonenzymatic glycation and oxidation of proteins and lipids that accumulate in diabetes and in inflammatory foci. The discovery that RAGE was a receptor for inflammatory S100/calgranulins and high mobility group box 1 (HMGB1) set the stage for linking RAGE to both the consequences and causes of types 1 and 2 diabetes. Recent discoveries regarding the structure of RAGE as well as novel intracellular binding partner interactions advance our understanding of the mechanisms by which RAGE evokes pathological consequences and underscore strategies by which antagonism of RAGE in the clinic may be realized. Finally, recent data tracking RAGE in the clinic suggest that levels of soluble RAGEs and polymorphisms in the gene encoding RAGE may hold promise for the identification of patients who are vulnerable to the complications of diabetes and/or are receptive to therapeutic interventions designed to prevent and reverse the damage inflicted by chronic hyperglycemia, irrespective of its etiology.
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Affiliation(s)
- Ravichandran Ramasamy
- Diabetes Research Program, Division of Endocrinology, Department of Medicine, New York University School of Medicine, New York, New York 10016, USA
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22
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Koucký M, Germanová A, Kalousová M, Hill M, Cindrová-Davies T, Pařízek A, Svarcová J, Zima T, Hájek Z. Low maternal serum matrix metalloproteinase (MMP)-2 concentrations are associated with preterm labor and fetal inflammatory response. J Perinat Med 2010; 38:589-96. [PMID: 20707620 DOI: 10.1515/jpm.2010.092] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES to assess the relationship between maternal and umbilical serum concentrations of matrix metalloproteinases (MMP)-2,8,9, the soluble receptor for advanced glycation end products (sRAGE) and IL-10 and premature delivery and fetal inflammation. METHODS maternal serum levels of MMPs, sRAGE, IL-10 and C-reactive protein (CRP) were determined in 67 women with preterm labor and in 38 healthy pregnant women of similar gestational age (GA). In the group with preterm labor we also determined umbilical concentrations of MMPs, IL-6 and sRAGE. The group with preterm labor was additionally divided based on the presence of funisitis and elevations of fetal umbilical IL-6 concentrations. RESULTS maternal serum levels of MMP-2 and sRAGE were significantly lower in women with preterm labor compared to women with normal pregnancy. Additionally, within the group of women with preterm labor, maternal serum MMP-2 concentrations were significantly lower in the subgroup with funisitis and in the subgroup with elevated umbilical concentration of IL-6. CONCLUSION our results demonstrate significantly different serum concentrations of MMP-2 and sRAGE in women with preterm labor compared to healthy pregnant patients of the same GA.
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Affiliation(s)
- Michal Koucký
- Department of Gynecology and Obstetrics of the First Faculty of Medicine and General Teaching Hospital, Charles University in Prague, Prague, Czech Republic
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23
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Martin DC, Semple JL, Sefton MV. Poly(methacrylic acid-co-methyl methacrylate) beads promote vascularization and wound repair in diabetic mice. J Biomed Mater Res A 2010; 93:484-92. [PMID: 19585566 DOI: 10.1002/jbm.a.32528] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Topical application of beads made from poly(methacrylic acid-co-methyl methacrylate) (45 mol % methacrylic acid, MAA) increased the number of blood vessels and improved 1.5 x 1.5 cm full thickness wound closure in a diabetic mouse (db/db) model. Three groups were compared: MAA beads, control poly(methyl methacrylate) beads (PMMA), and no bead blanks. MAA bead treatment significantly increased percent wound closure at all timepoints (7, 14, and 21 days) with MAA bead-treated wounds almost closed at day 21 (91 +/- 5.4% MAA vs. 79 +/- 3.2% PMMA or 76 +/- 4.8% no beads; p < 0.05). This was consistent with the expected significant increase in vascularity in the MAA group at days 7 and 14. For example at day 14, MAA bead-treated wounds had a vascular density of 22.7 +/- 2.6 vessels/hpf compared with 17.0 +/- 2.0 vessels/hpf in the PMMA bead group (p < 0.05). Epithelial gap and migration measurements suggested that the increased vascularity leads to enhanced epithelial cell migration as a principal means of wound closure. Although studies are underway to elucidate the mechanism of this angiogenic response, the results presented here support the notion that such materials, perhaps in other forms, may be useful in wound care or in other situations where vascularity is to be enhanced without the use of exogenous growth factors.
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Affiliation(s)
- Daniel C Martin
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
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24
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Germanová A, Koucký M, Hájek Z, Pařízek A, Zima T, Kalousová M. Soluble receptor for advanced glycation end products in physiological and pathological pregnancy. Clin Biochem 2010; 43:442-6. [DOI: 10.1016/j.clinbiochem.2009.11.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Revised: 10/29/2009] [Accepted: 11/01/2009] [Indexed: 11/27/2022]
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Circulating levels of a soluble form of receptor for advanced glycation end products and high-mobility group box chromosomal protein 1 in patients with acute pancreatitis. Pancreas 2009; 38:e215-20. [PMID: 19786934 DOI: 10.1097/mpa.0b013e3181bb59a7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVES To study in patients with acute pancreatitis (AP) the plasma soluble form of the receptor for advanced glycation end products (sRAGE) and high-mobility group box chromosomal protein 1 (HMGB1) levels, followed-up for 12 days after hospitalization, in relation to the occurrence of organ failure and mortality. METHODS Thirty-eight patients with severe AP and organ failure (grade 2). A control group (127 patients) consisted of 38 patients with severe AP without organ failure (grade 1) and 89 patients with mild AP (grade 0). Plasma samples for determination of HMGB1 and sRAGE levels were collected on admission and on days 1 and 2, days 3 and 4, and days 7 and 12 after admission. RESULTS The median of the highest sRAGE levels was higher in grade 2 patients (472 pg/mL; interquartile range [IQR], 259-912) than in grade 0 plus grade 1 patients (349 pg/mL; IQR, 209-544; P = 0.024). Among the patients with detectable HMGB1, the median of the highest HMGB1 levels was 117 ng/mL (IQR, 56-212; n = 24) in grade 2 patients and 87 ng/mL (IQR, 54-161; n = 62) in grade 0 plus grade 1 patients (P = 0.310). CONCLUSIONS We demonstrate that sRAGE level, but not HMGB1 level, is significantly higher in AP patients who develop organ failure than in AP patients without organ failure who recover.
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Yoshida T, Flegler A, Kozlov A, Stern PH. Direct inhibitory and indirect stimulatory effects of RAGE ligand S100 on sRANKL-induced osteoclastogenesis. J Cell Biochem 2009; 107:917-25. [DOI: 10.1002/jcb.22192] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Edwards JL, Vincent A, Cheng T, Feldman EL. Diabetic neuropathy: mechanisms to management. Pharmacol Ther 2008; 120:1-34. [PMID: 18616962 PMCID: PMC4007052 DOI: 10.1016/j.pharmthera.2008.05.005] [Citation(s) in RCA: 461] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2008] [Accepted: 05/15/2008] [Indexed: 02/07/2023]
Abstract
Neuropathy is the most common and debilitating complication of diabetes and results in pain, decreased motility, and amputation. Diabetic neuropathy encompasses a variety of forms whose impact ranges from discomfort to death. Hyperglycemia induces oxidative stress in diabetic neurons and results in activation of multiple biochemical pathways. These activated pathways are a major source of damage and are potential therapeutic targets in diabetic neuropathy. Though therapies are available to alleviate the symptoms of diabetic neuropathy, few options are available to eliminate the root causes. The immense physical, psychological, and economic cost of diabetic neuropathy underscore the need for causally targeted therapies. This review covers the pathology, epidemiology, biochemical pathways, and prevention of diabetic neuropathy, as well as discusses current symptomatic and causal therapies and novel approaches to identify therapeutic targets.
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Affiliation(s)
- James L. Edwards
- The University of Michigan, Department of Neurology, Ann Arbor, Michigan 48109
| | - Andrea Vincent
- The University of Michigan, Department of Neurology, Ann Arbor, Michigan 48109
| | - Thomas Cheng
- The University of Michigan, Department of Neurology, Ann Arbor, Michigan 48109
| | - Eva L. Feldman
- The University of Michigan, Department of Neurology, Ann Arbor, Michigan 48109
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Englert JM, Hanford LE, Kaminski N, Tobolewski JM, Tan RJ, Fattman CL, Ramsgaard L, Richards TJ, Loutaev I, Nawroth PP, Kasper M, Bierhaus A, Oury TD. A role for the receptor for advanced glycation end products in idiopathic pulmonary fibrosis. THE AMERICAN JOURNAL OF PATHOLOGY 2008; 172:583-91. [PMID: 18245812 DOI: 10.2353/ajpath.2008.070569] [Citation(s) in RCA: 162] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a severely debilitating disease associated with a dismal prognosis. There are currently no effective therapies for IPF, thus the identification of novel therapeutic targets is greatly needed. The receptor for advanced glycation end products (RAGE) is a member of the immunoglobulin superfamily of cell surface receptors whose activation has been linked to various pathologies. In healthy adult animals, RAGE is expressed at the highest levels in the lung compared to other tissues. To investigate the hypothesis that RAGE is involved in IPF pathogenesis, we have examined its expression in two mouse models of pulmonary fibrosis and in human tissue from IPF patients. In each instance we observed a depletion of membrane RAGE and its soluble (decoy) isoform, sRAGE, in fibrotic lungs. In contrast to other diseases in which RAGE signaling promotes pathology, immunohistochemical and hydroxyproline quantification studies on aged RAGE-null mice indicate that these mice spontaneously develop pulmonary fibrosis-like alterations. Furthermore, when subjected to a model of pulmonary fibrosis, RAGE-null mice developed more severe fibrosis, as measured by hydroxyproline assay and histological scoring, than wild-type controls. Combined with data from other studies on mouse models of pulmonary fibrosis and human IPF tissues indicate that loss of RAGE contributes to IPF pathogenesis.
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Affiliation(s)
- Judson M Englert
- Department of Pathology,University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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29
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Gross S, van Ree RM, Oterdoom LH, de Vries APJ, van Son WJ, de Jong PE, Navis GJ, Zuurman MW, Bierhaus A, Gans ROB, Bakker SJL. Low levels of sRAGE are associated with increased risk for mortality in renal transplant recipients. Transplantation 2007; 84:659-63. [PMID: 17876282 DOI: 10.1097/01.tp.0000280556.16275.2a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Infusion of the soluble form of the receptor for advanced glycation end-products (sRAGE) was protective against atherosclerosis and nephropathy in animal models. In this study we investigated determinants of endogenous sRAGE in renal transplant recipients and whether sRAGE was associated with mortality and graft loss. METHODS AND RESULTS A total of 591 patients participated at a median time of 6 years after transplantation. Independent determinants of sRAGE were mycophenolate mofetil medication (beta=-0.21, P<0.001), creatinine clearance (beta=-0.15, P<0.001), BMI (beta=-0.12, P=0.003) and fasting insulin concentration (beta=-0.14, P=0.001). Low sRAGE levels were associated with a 2-3 times higher risk for mortality especially after correction for creatinine clearance (P=0.006). CONCLUSION A lack of sRAGE is a risk factor for mortality in renal transplant recipients. The putatively protective role of sRAGE and in particular its association with mycophenolate mofetil usage needs further investigation.
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Affiliation(s)
- Sascha Gross
- Kidney Center, Department of Internal Medicine, University Medical Center Groningen, Groningen, the Netherlands
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30
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Raman KG, Sappington PL, Yang R, Levy RM, Prince JM, Liu S, Watkins SK, Schmidt AM, Billiar TR, Fink MP. The role of RAGE in the pathogenesis of intestinal barrier dysfunction after hemorrhagic shock. Am J Physiol Gastrointest Liver Physiol 2006; 291:G556-65. [PMID: 16751175 DOI: 10.1152/ajpgi.00055.2006] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The receptor for advanced glycation end products (RAGE) has been implicated in the pathogenesis of numerous conditions associated with excessive inflammation. To determine whether RAGE-dependent signaling is important in the development of intestinal barrier dysfunction after hemorrhagic shock and resuscitation (HS/R), C57Bl/6, rage(-/-), or congenic rage(+/+) mice were subjected to HS/R (mean arterial pressure of 25 mmHg for 3 h) or a sham procedure. Twenty-four hours later, bacterial translocation to mesenteric lymph nodes and ileal mucosal permeability to FITC-labeled dextran were assessed. Additionally, samples of ileum were obtained for immunofluorescence microscopy, and plasma was collected for measuring IL-6 and IL-10 levels. HS/R in C57Bl/6 mice was associated with increased bacterial translocation, ileal mucosal hyperpermeability, and high circulating levels of IL-6. All of these effects were prevented when C57Bl/6 mice were treated with recombinant human soluble RAGE (sRAGE; the extracellular ligand-binding domain of RAGE). HS/R induced bacterial translocation, ileal mucosal hyperpermeability, and high plasma IL-6 levels in rage(+/+) but not rage(-/-) mice. Circulating IL-10 levels were higher in rage(-/-) compared with rage(+/+) mice. These results suggest that activation of RAGE-dependent signaling is a key factor leading to gut mucosal barrier dysfunction after HS/R.
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Affiliation(s)
- Kathleen G Raman
- Univ. of Pittsburgh School of Medicine, 616 Scaife Hall, 3550 Terrace St., Pittsburgh, PA 15213, USA
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Ding Q, Keller JN. Evaluation of rage isoforms, ligands, and signaling in the brain. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2005; 1746:18-27. [PMID: 16214242 DOI: 10.1016/j.bbamcr.2005.08.006] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2005] [Revised: 08/25/2005] [Accepted: 08/25/2005] [Indexed: 11/28/2022]
Abstract
Since the identification of the receptor for advanced glycosylation end products (RAGE) in 1992, there have been tremendous strides made in our understanding of the role RAGE receptors play in a variety of physiological and pathological processes. Despite such progress, several fundamental aspects of RAGE expression and RAGE function remain largely unanswered. In particular, while multiple forms of the RAGE receptor are known to exist, little is known with regards to how these different isoforms of the RAGE receptor work together to mediate RAGE signaling. For example, some forms of the RAGE receptor may promote deleterious feed-forward pathways, while others may serve to inhibit deleterious activation of the RAGE receptor. Additionally, important questions remain with regards to the intracellular domain of the full-length RAGE receptor, and the specifics surrounding how intracellular signaling pathways become activated via the RAGE family of receptors. The focus of this review is to address each of these important issues, as well as other key aspects of RAGE biology, and discuss how they are important for both our understanding of the physiological and pathological roles of RAGE signaling within the brain.
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Affiliation(s)
- Qunxing Ding
- Department of Anatomy and Neurobiology, Sanders-Brown Center on Aging, University of Kentucky, 205 Sanders-Brown Center on Aging, 800 South Limestone, Lexington, KY 40536-0230, USA
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Hanford LE, Enghild JJ, Valnickova Z, Petersen SV, Schaefer LM, Schaefer TM, Reinhart TA, Oury TD. Purification and characterization of mouse soluble receptor for advanced glycation end products (sRAGE). J Biol Chem 2004; 279:50019-24. [PMID: 15381690 PMCID: PMC1868562 DOI: 10.1074/jbc.m409782200] [Citation(s) in RCA: 167] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The receptor for advanced glycation end products (RAGE) is a member of the immunoglobulin superfamily of cell surface proteins that has been implicated as a progression factor in a number of pathologic conditions from chronic inflammation to cancer to Alzheimer's disease. In such conditions, RAGE acts to facilitate pathogenic processes. Its secreted isoform, soluble RAGE or sRAGE, has the ability to prevent RAGE signaling by acting as a decoy. sRAGE has been used successfully in animal models of a range of diseases to antagonize RAGE-mediated pathologic processes. In humans, sRAGE results from alternative splicing of RAGE mRNA. This study was aimed to determine whether the same holds true for mouse sRAGE and, in addition, to biochemically characterize mouse sRAGE. The biochemical characteristics examined include glycosylation and disulfide patterns. In addition, sRAGE was found to bind heparin, which may mediate its distribution in the extracellular matrix and cell surfaces of tissues. Finally, our data indicated that sRAGE in the mouse is likely produced by carboxyl-terminal truncation, in contrast to the alternative splicing mechanism reported in humans.
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Affiliation(s)
- Lana E. Hanford
- Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15261
| | - Jan J. Enghild
- Department of Molecular Biology, University of Aarhus, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark
| | - Zuzana Valnickova
- Department of Molecular Biology, University of Aarhus, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark
| | - Steen V. Petersen
- Department of Molecular Biology, University of Aarhus, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark
| | - Lisa M. Schaefer
- Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15261
| | - Todd M. Schaefer
- Department of Physiology, Dartmouth Medical School, Lebanon, New Hampshire 03756
| | - Todd A. Reinhart
- Department of Infectious Diseases and Microbiology, University of Pittsburgh, Graduate School of Public Health, Pittsburgh, Pennsylvania 15261
| | - Tim D. Oury
- Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15261
- || To whom correspondence should be addressed: Dept. of Pathology, University of Pittsburgh, 3550 Terrace St., Scaife Hall S740, Pitts-burgh, PA 15261. Tel.: 412-648-9659; Fax: 412-648-9172; E-mail:
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