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Gędaj A, Gregorczyk P, Żukowska D, Chorążewska A, Ciura K, Kalka M, Porębska N, Opaliński Ł. Glycosylation of FGF/FGFR: An underrated sweet code regulating cellular signaling programs. Cytokine Growth Factor Rev 2024; 77:39-55. [PMID: 38719671 DOI: 10.1016/j.cytogfr.2024.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/23/2024] [Accepted: 04/23/2024] [Indexed: 06/22/2024]
Abstract
Fibroblast growth factors (FGFs) and their receptors (FGFRs) constitute plasma-membrane localized signaling hubs that transmit signals from the extracellular environment to the cell interior, governing pivotal cellular processes like motility, metabolism, differentiation, division and death. FGF/FGFR signaling is critical for human body development and homeostasis; dysregulation of FGF/FGFR units is observed in numerous developmental diseases and in about 10% of human cancers. Glycosylation is a highly abundant posttranslational modification that is critical for physiological and pathological functions of the cell. Glycosylation is also very common within FGF/FGFR signaling hubs. Vast majority of FGFs (15 out of 22 members) are N-glycosylated and few FGFs are O-glycosylated. Glycosylation is even more abundant within FGFRs; all FGFRs are heavily N-glycosylated in numerous positions within their extracellular domains. A growing number of studies points on the multiple roles of glycosylation in fine-tuning FGF/FGFR signaling. Glycosylation modifies secretion of FGFs, determines their stability and affects interaction with FGFRs and co-receptors. Glycosylation of FGFRs determines their intracellular sorting, constitutes autoinhibitory mechanism within FGFRs and adjusts FGF and co-receptor recognition. Sugar chains attached to FGFs and FGFRs constitute also a form of code that is differentially decrypted by extracellular lectins, galectins, which transform FGF/FGFR signaling at multiple levels. This review focuses on the identified functions of glycosylation within FGFs and FGFRs and discusses their relevance for the cell physiology in health and disease.
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Affiliation(s)
- Aleksandra Gędaj
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland
| | - Paulina Gregorczyk
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland
| | - Dominika Żukowska
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland
| | - Aleksandra Chorążewska
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland
| | - Krzysztof Ciura
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland
| | - Marta Kalka
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland
| | - Natalia Porębska
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland
| | - Łukasz Opaliński
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland.
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Hallmarks of Metabolic Reprogramming and Their Role in Viral Pathogenesis. Viruses 2022; 14:v14030602. [PMID: 35337009 PMCID: PMC8955778 DOI: 10.3390/v14030602] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/09/2022] [Accepted: 03/10/2022] [Indexed: 02/07/2023] Open
Abstract
Metabolic reprogramming is a hallmark of cancer and has proven to be critical in viral infections. Metabolic reprogramming provides the cell with energy and biomass for large-scale biosynthesis. Based on studies of the cellular changes that contribute to metabolic reprogramming, seven main hallmarks can be identified: (1) increased glycolysis and lactic acid, (2) increased glutaminolysis, (3) increased pentose phosphate pathway, (4) mitochondrial changes, (5) increased lipid metabolism, (6) changes in amino acid metabolism, and (7) changes in other biosynthetic and bioenergetic pathways. Viruses depend on metabolic reprogramming to increase biomass to fuel viral genome replication and production of new virions. Viruses take advantage of the non-metabolic effects of metabolic reprogramming, creating an anti-apoptotic environment and evading the immune system. Other non-metabolic effects can negatively affect cellular function. Understanding the role metabolic reprogramming plays in viral pathogenesis may provide better therapeutic targets for antivirals.
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Basic fibroblast growth factor alleviates metabolic abnormalities in the heart of streptozotocin-induced diabetic rats. Int J Diabetes Dev Ctries 2022. [DOI: 10.1007/s13410-022-01059-2] [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: 10/18/2022] Open
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Mercier C, Brazeau T, Lamoureux J, Boisvert E, Robillard S, Breton V, Paré M, Guay A, Lizotte F, Despatis MA, Geraldes P. Diabetes Impaired Ischemia-Induced PDGF (Platelet-Derived Growth Factor) Signaling Actions and Vessel Formation Through the Activation of Scr Homology 2-Containing Phosphatase-1. Arterioscler Thromb Vasc Biol 2021; 41:2469-2482. [PMID: 34320834 DOI: 10.1161/atvbaha.121.316638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Objective Critical limb ischemia is a major complication of diabetes characterized by insufficient collateral vessel development and proper growth factor signaling unresponsiveness. Although mainly deactivated by hypoxia, phosphatases are important players in the deregulation of proangiogenetic pathways. Previously, SHP-1 (Scr homology 2-containing phosphatase-1) was found to be associated with the downregulation of growth factor actions in the diabetic muscle. Thus, we aimed to gain further understanding of the impact of SHP-1 on smooth muscle cell (SMC) function under hypoxic and diabetic conditions. Approach and Results Despite being inactivated under hypoxic conditions, high glucose level exposure sustained SHP-1 phosphatase activity in SMC and increased its interaction with PDGFR (platelet-derived growth factor receptor)-β, thus reducing PDGF proangiogenic actions. Overexpression of an inactive form of SHP-1 fully restored PDGF-induced proliferation, migration, and signaling pathways in SMC exposed to high glucose and hypoxia. Nondiabetic and diabetic mice with deletion of SHP-1 specifically in SMC were generated. Ligation of the femoral artery was performed, and blood flow was measured for 4 weeks. Blood flow reperfusion, vascular density and maturation, and limb survival were all improved while vascular apoptosis was attenuated in diabetic SMC-specific SHP-1 null mice as compared to diabetic mice. Conclusions Diabetes and high glucose level exposure maintained SHP-1 activity preventing hypoxia-induced PDGF actions in SMC. Specific deletion of SHP-1 in SMC partially restored blood flow reperfusion in the diabetic ischemic limb. Therefore, local modulation of SHP-1 activity in SMC could represent a potential therapeutic avenue to improve the proangiogenic properties of SMC under ischemia and diabetes.
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MESH Headings
- Angiogenesis Inducing Agents/pharmacology
- Animals
- Blood Glucose/metabolism
- Case-Control Studies
- Cattle
- Cell Hypoxia
- Cell Movement/drug effects
- Cell Proliferation/drug effects
- Cells, Cultured
- Diabetes Mellitus, Experimental/enzymology
- Diabetes Mellitus, Experimental/genetics
- Diabetes Mellitus, Experimental/physiopathology
- Diabetic Angiopathies/enzymology
- Diabetic Angiopathies/genetics
- Diabetic Angiopathies/physiopathology
- Enzyme Activation
- Hindlimb/blood supply
- Humans
- Ischemia/enzymology
- Ischemia/physiopathology
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/enzymology
- Muscle, Smooth, Vascular/pathology
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/enzymology
- Myocytes, Smooth Muscle/pathology
- Neovascularization, Physiologic/drug effects
- Platelet-Derived Growth Factor/pharmacology
- Protein Tyrosine Phosphatase, Non-Receptor Type 6/genetics
- Protein Tyrosine Phosphatase, Non-Receptor Type 6/metabolism
- Signal Transduction
- Mice
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Affiliation(s)
- Clément Mercier
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke (C.M., T.B., J.L., E.B., S.R., V.B., M.P., A.G., F.L., P.G.), Université de Sherbrooke, Québec, Canada
| | - Tristan Brazeau
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke (C.M., T.B., J.L., E.B., S.R., V.B., M.P., A.G., F.L., P.G.), Université de Sherbrooke, Québec, Canada
| | - Jérémy Lamoureux
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke (C.M., T.B., J.L., E.B., S.R., V.B., M.P., A.G., F.L., P.G.), Université de Sherbrooke, Québec, Canada
| | - Elizabeth Boisvert
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke (C.M., T.B., J.L., E.B., S.R., V.B., M.P., A.G., F.L., P.G.), Université de Sherbrooke, Québec, Canada
| | - Stéphanie Robillard
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke (C.M., T.B., J.L., E.B., S.R., V.B., M.P., A.G., F.L., P.G.), Université de Sherbrooke, Québec, Canada
| | - Valérie Breton
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke (C.M., T.B., J.L., E.B., S.R., V.B., M.P., A.G., F.L., P.G.), Université de Sherbrooke, Québec, Canada
| | - Martin Paré
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke (C.M., T.B., J.L., E.B., S.R., V.B., M.P., A.G., F.L., P.G.), Université de Sherbrooke, Québec, Canada
| | - Andréanne Guay
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke (C.M., T.B., J.L., E.B., S.R., V.B., M.P., A.G., F.L., P.G.), Université de Sherbrooke, Québec, Canada
| | - Farah Lizotte
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke (C.M., T.B., J.L., E.B., S.R., V.B., M.P., A.G., F.L., P.G.), Université de Sherbrooke, Québec, Canada
| | | | - Pedro Geraldes
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke (C.M., T.B., J.L., E.B., S.R., V.B., M.P., A.G., F.L., P.G.), Université de Sherbrooke, Québec, Canada
- Division of Endocrinology, Department of Medicine (P.G.), Université de Sherbrooke, Québec, Canada
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Magenta A, Florio MC, Ruggeri M, Furgiuele S. Autologous cell therapy in diabetes‑associated critical limb ischemia: From basic studies to clinical outcomes (Review). Int J Mol Med 2021; 48:173. [PMID: 34278463 DOI: 10.3892/ijmm.2021.5006] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 09/30/2020] [Indexed: 01/13/2023] Open
Abstract
Cell therapy is becoming an attractive alternative for the treatment of patients with no‑option critical limb ischemia (CLI). The main benefits of cell therapy are the induction of therapeutic angiogenesis and neovascularization that lead to an increase in blood flow in the ischemic limb and tissue regeneration in non‑healing cutaneous trophic lesions. In the present review, the current state of the art of strategies in the cell therapy field are summarized, focusing on intra‑operative autologous cell concentrates in diabetic patients with CLI, examining different sources of cell concentrates and their mechanisms of action. The present study underlined the detrimental effects of the diabetic condition on different sources of autologous cells used in cell therapy, and also in delaying wound healing capacity. Moreover, relevant clinical trials and critical issues arising from cell therapy trials are discussed. Finally, the new concept of cell therapy as an adjuvant therapy to increase wound healing in revascularized diabetic patients is introduced.
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Affiliation(s)
| | - Maria Cristina Florio
- Laboratory of Cardiovascular Science, National Institute on Aging (NIA), National Institutes of Health (NIH), Baltimore, MD 21224, USA
| | - Massimo Ruggeri
- Department of Vascular Surgery, San Camillo de Lellis Hospital, I‑02100 Rieti, Italy
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Ali M, Mali V, Haddox S, AbdelGhany SM, El-Deek SEM, Abulfadl A, Matrougui K, Belmadani S. Essential Role of IL-12 in Angiogenesis in Type 2 Diabetes. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:2590-2601. [PMID: 28837799 DOI: 10.1016/j.ajpath.2017.07.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 07/05/2017] [Indexed: 12/11/2022]
Abstract
Recently, IL-12 emerged as a critical player in type 2 diabetes complications. We previously reported that ischemia-induced angiogenesis is compromised in type 2 diabetic mice. In this study, we determined that IL-12 disruption rescued angiogenesis and arteriogenesis in type 2 diabetic mice. To induce type 2 diabetes, wild-type (WT), p40IL-12-/- (p40-/-), and p35IL-12-/- (p35-/-) mice were fed a high-fat diet (HFD) for 12 weeks. Body weight, glucose test tolerance, and insulin test tolerance were assessed. After 12 weeks of an HFD, the femoral artery was ligated and blood flow recovery was measured every week for 4 weeks. WT, p40-/-, and p35-/- mice fed an HFD become obese after 12 weeks and exhibit glucose intolerance and insulin resistance. Blood flow recovery was fully restored in 2 to 3 weeks after femoral artery ligation in all groups of mice fed a normal diet. However, after 12 weeks of an HFD, blood flow recovery was compromised in WT mice, whereas it was fully recovered in p40-/- and p35-/- mice. The mechanism of blood flow recovery involves an increase in capillary/arteriole density, endothelial nitric oxide synthase/Akt/vascular endothelial growth factor receptor 2 signaling, and a reduction in oxidative stress and inflammation. The disruption of IL-12 promotes angiogenesis and increases blood flow recovery in obese type 2 diabetic mice by an endothelial nitric oxide synthase/Akt/vascular endothelial growth factor receptor 2/oxidative stress-inflammation-dependent mechanism.
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Affiliation(s)
- Maha Ali
- Department of Physiological Science, Eastern Virginia Medical School, Norfolk, Virginia; Department of Medical Biochemistry, Assiut University, Assiut, Egypt
| | - Vishal Mali
- Department of Physiological Science, Eastern Virginia Medical School, Norfolk, Virginia
| | - Samuel Haddox
- Department of Physiological Science, Eastern Virginia Medical School, Norfolk, Virginia
| | - Soad M AbdelGhany
- Department of Medical Biochemistry, Assiut University, Assiut, Egypt
| | - Sahar E M El-Deek
- Department of Medical Biochemistry, Assiut University, Assiut, Egypt
| | - Atif Abulfadl
- Department of Medical Biochemistry, Assiut University, Assiut, Egypt
| | - Khalid Matrougui
- Department of Physiological Science, Eastern Virginia Medical School, Norfolk, Virginia
| | - Souad Belmadani
- Department of Physiological Science, Eastern Virginia Medical School, Norfolk, Virginia.
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Tian M, Qing C, Niu Y, Dong J, Cao X, Song F, Ji X, Lu S. Aminoguanidine cream ameliorates skin tissue microenvironment in diabetic rats. Arch Med Sci 2016; 12:179-87. [PMID: 26925135 PMCID: PMC4754380 DOI: 10.5114/aoms.2016.57595] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 06/07/2014] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION The aim of the study was to explore the effect of aminoguanidine cream on the skin tissue microenvironment in diabetic rats. MATERIAL AND METHODS A total of 51 healthy male Sprague Dawley (SD) rats were randomly divided into three groups: the diabetes group (n = 18), the aminoguanidine group (n = 18) and the control group (n = 15). Rats in the diabetes group and aminoguanidine group were injected with 65 mg/kg streptozotocin to induce the diabetes model, and in the control group with citrate buffer. After successful induction of diabetes, the back hair of all rats was stripped by barium sulfide, and the aminoguanidine group was treated with aminoguanidine cream using disinfected cotton swabs twice every day for 40 days, while the diabetes and control groups were treated with the cream matrix. The pathological changes of skin were observed by HE staining, while the content of inflammatory cytokines (TNF-α, IL-8, ICAM and IL-1α) and the antioxidant indexes (T-AOC, GSH-PX, MPO MDA H2O2) were examined using commercial kits. RESULTS After 40 days of treatment, the diabetes group manifested tissue lesions, whereas the aminoguanidine group seemed normal. Compared with the diabetes group, the content of inflammatory cytokines TNF-α, IL-8, ICAM and IL-1α was dramatically lower in the aminoguanidine group. T-AOC in all groups underwent dramatic changes and returned to normal finally. The activities of GSH-PX and MPO and content of H2O2 in the diabetes group were all higher than those in the aminoguanidine group. CONCLUSIONS Aminoguanidine may have a good systemic effect on alleviating the pathological changes of skin tissue in diabetic rats, which may be attributed to the regulation of GSH-PX, TNF-α, IL-8, ICAM and IL-1α.
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Affiliation(s)
- Ming Tian
- Shanghai Burns Institute, Rui Jin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Chun Qing
- Shanghai Burns Institute, Rui Jin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Yiwen Niu
- Shanghai Burns Institute, Rui Jin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Jiaoyun Dong
- Shanghai Burns Institute, Rui Jin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Xiaozan Cao
- Shanghai Burns Institute, Rui Jin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Fei Song
- Shanghai Burns Institute, Rui Jin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Xiaoyun Ji
- Shanghai Burns Institute, Rui Jin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Shuliang Lu
- Shanghai Burns Institute, Rui Jin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
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Claudino M, Nunes IS, Gennaro G, Cestari TM, Spadella CT, Garlet GP, de Assis GF. Diabetes triggers the loss of tooth structure associated to radiographical and histological dental changes and its evolution to progressive pulp and periapical lesions in rats. Arch Oral Biol 2015; 60:1690-8. [DOI: 10.1016/j.archoralbio.2015.08.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Revised: 08/20/2015] [Accepted: 08/31/2015] [Indexed: 11/28/2022]
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9
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Roca F, Grossin N, Chassagne P, Puisieux F, Boulanger E. Glycation: the angiogenic paradox in aging and age-related disorders and diseases. Ageing Res Rev 2014; 15:146-60. [PMID: 24742501 DOI: 10.1016/j.arr.2014.03.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 03/26/2014] [Accepted: 03/31/2014] [Indexed: 01/09/2023]
Abstract
Angiogenesis is generally a quiescent process which, however, may be modified by different physiological and pathological conditions. The "angiogenic paradox" has been described in diabetes because this disease impairs the angiogenic response in a manner that differs depending on the organs involved and disease evolution. Aging is also associated with pro- and antiangiogenic processes. Glycation, the post-translational modification of proteins, increases with aging and the progression of diabetes. The effect of glycation on angiogenesis depends on the type of glycated proteins and cells involved. This complex link could be responsible for the "angiogenic paradox" in aging and age-related disorders and diseases. Using diabetes as a model, the present work has attempted to review the age-related angiogenic paradox, in particular the effects of glycation on angiogenesis during aging.
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Affiliation(s)
- F Roca
- Vascular Aging Biology, Blood-Vessel Interface and Vascular Repair Unit, Lille School of Medicine, Lille2 University, Lille, France; Geriatrics Department, Rouen University Hospital, Rouen, France.
| | - N Grossin
- Vascular Aging Biology, Blood-Vessel Interface and Vascular Repair Unit, Lille School of Medicine, Lille2 University, Lille, France
| | - P Chassagne
- Geriatrics Department, Rouen University Hospital, Rouen, France
| | - F Puisieux
- Vascular Aging Biology, Blood-Vessel Interface and Vascular Repair Unit, Lille School of Medicine, Lille2 University, Lille, France; Gerontology Clinic, Les Bateliers Geriatric Hospital, Lille University Hospital, Lille, France
| | - E Boulanger
- Vascular Aging Biology, Blood-Vessel Interface and Vascular Repair Unit, Lille School of Medicine, Lille2 University, Lille, France; Gerontology Clinic, Les Bateliers Geriatric Hospital, Lille University Hospital, Lille, France
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Kumar M, Gautam MK, Singh A, Goel RK. Healing effects of Musa sapientum var. paradisiaca in diabetic rats with co-occurring gastric ulcer: cytokines and growth factor by PCR amplification. Altern Ther Health Med 2013; 13:305. [PMID: 24192345 PMCID: PMC3826524 DOI: 10.1186/1472-6882-13-305] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2013] [Accepted: 10/24/2013] [Indexed: 01/30/2023]
Abstract
Background The present study evaluates the effects of extract of Musa sapientum fruit (MSE) on ulcer index, blood glucose level and gastric mucosal cytokines, TNF-α and IL-1β and growth factor, TGF-α (affected in diabetes and chronic ulcer) in acetic acid (AA)-induced gastric ulcer (GU) in diabetic (DR) rat. Methods MSE (100 mg/kg, oral), omeprazole (OMZ, 2.0 mg/kg, oral), insulin (INS, 4 U/kg, sc) or pentoxyphylline (PTX, 10 mg/kg, oral) were given once daily for 10 days in 14 days post-streptozotocin (60 mg/kg, intraperitoneal)-induced diabetic rats while, the normal/diabetic rats received CMC for the same period after induction of GU with AA. Ulcer index was calculated based upon the product of length and width (mm2/rat) of ulcers while, TNF-α, IL-1β and TGF-α were estimated in the gastric mucosal homogenate from the intact/ulcer region. Phytochemical screening and HPTLC analysis of MSE was done following standard procedures. Results An increase in ulcer index, TNF-α and IL-1β were observed in normal (NR)-AA rat compared to NR-normal saline rat, which were further increased in DR-AA rat while, treatments of DR-AA rat with MSE, OMZ, INS and PTX reversed them, more so with MSE and PTX. Significant increase in TGF-α was found in NR-AA rat which did not increase further in DR-AA rat. MSE and PTX tended to increase while, OMZ and INS showed little or no effect on TGF-α in AA-DR rat. Phytochemical screening of MSE showed the presence of saponins, flavonoids, glycosides, steroids and alkaloids and HPTLC analysis indicated the presence of eight active compounds. Conclusion MSE showed antidiabetic and better ulcer healing effects compared with OMZ (antiulcer) or INS (antidiabetic) in diabetic rat and could be more effective in diabetes with concurrent gastric ulcer.
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Xiang J, Zhao Y, Chen J, Zhou J. Expression of basic fibroblast growth factor, protein kinase C and members of the apoptotic pathway in skeletal muscle of streptozotocin-induced diabetic rats. Tissue Cell 2013; 46:1-8. [PMID: 24008114 DOI: 10.1016/j.tice.2013.07.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 07/22/2013] [Accepted: 07/22/2013] [Indexed: 01/11/2023]
Abstract
This study investigated the potential mechanisms that may underlie diabetes induced amyoatrophy. Sprague-Dawley rats were either injected intraperiotneally with STZ (test group; N=8) to induce diabetic-like symptoms (blood glucose level ≥16.65mmol/L) or with buffer (control group; N=8). Differences in muscle structure between the STZ-induced diabetic and control groups were evaluated by histochemistry. Protein and mRNA levels of basic FGF (bFGF), bax, bcl-2, and caspase 3 in skeletal muscle were compared between the 2 groups using immunohistochemistry and quantitative PCR, respectively. Serum level of insulin and protein kinase C (PKC) were measured by competitive RIA and ELISA, respectively. Unlike control animals, the skeletal muscle fibers from STZ-induced diabetic animals were broken and pyknotic, the sarcomeric structure disrupted, and mild hyperplasia of interstitial adipose tissues was detected. The serum level of PKC was higher (P=0.003) and the protein and mRNA levels of bFGF in skeletal muscle were lower (P=0.001) in STZ-induced diabetic versus control animals. Protein and mRNA levels of the apoptosis promoting genes caspase-3 and bax were higher in skeletal muscle from STZ-induced diabetic rats as compared to control animals (P<0.001 and P=0.037, respectively), while mRNA and protein levels of bcl-2, an inhibitor of apoptosis, was lower in STZ-induced diabetic rats versus control animals (P=0.026). Increasing apoptosis in skeletal muscle from STZ-induced diabetic rats was further demonstrated by TNNEL assay. Our findings suggest that enhanced PKC levels, reduction of bFGF expression, and increased in apoptosis might be associated with the development of diabetes-induced myoatrophy.
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Affiliation(s)
- Jingyan Xiang
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Yuwu Zhao
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China.
| | - Jingjiong Chen
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Jian Zhou
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
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Resveratrol prevents dendritic cell maturation in response to advanced glycation end products. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:574029. [PMID: 23936610 PMCID: PMC3725714 DOI: 10.1155/2013/574029] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 06/06/2013] [Accepted: 06/07/2013] [Indexed: 12/22/2022]
Abstract
Advanced glycation end products (AGEs), generated through nonenzymatic glycosylation of proteins, lipids, and nucleic acids, accumulate in the body by age thus being considered as biomarkers of senescence. Senescence is characterized by a breakdown of immunological self-tolerance, resulting in increased reactivity to self-antigens. Previous findings suggest that AGE and its receptor RAGE may be involved in the pathogenesis of autoimmune reactions through dendritic cell (DC) activation. The aim of this study was to investigate whether resveratrol, a polyphenolic antioxidant compound with tolerogenic effects on DCs, was able to counteract the mechanisms triggered by AGE/RAGE interaction on DCs. By immunochemical and cytofluorimetric assays, we demonstrated that in vitro pretreatment of human monocyte-derived DCs with resveratrol prevents DC activation in response to glucose-treated albumin (AGE-albumin). We found that resveratrol exerts an inhibitory effect on DC surface maturation marker and RAGE up-regulation in response to AGE-albumin. It also inhibited proinflammatory cytokine expression, allostimulatory ability upregulation, mitogen-activated protein (MAP) kinases, and NF-κB activation in AGE-albumin-stimulated DCs. We suggest that resveratrol, by dismantling AGE/RAGE signaling on DCs may prevent or reduce increased reactivity to self-molecules in aging.
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Lovati AB, Drago L, Monti L, De Vecchi E, Previdi S, Banfi G, Romanò CL. Diabetic mouse model of orthopaedic implant-related Staphylococcus aureus infection. PLoS One 2013; 8:e67628. [PMID: 23818985 PMCID: PMC3688606 DOI: 10.1371/journal.pone.0067628] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Accepted: 05/21/2013] [Indexed: 01/24/2023] Open
Abstract
Background Periprosthetic bacterial infections represent one of the most challenging orthopaedic complications that often require implant removal and surgical debridement and carry high social and economical costs. Diabetes is one of the most relevant risk factors of implant-related infection and its clinical occurrence is growing worldwide. The aim of the present study was to test a model of implant-related infection in the diabetic mouse, with a view to allow further investigation on the relative efficacy of prevention and treatment options in diabetic and non-diabetic individuals. Methodology A cohort of diabetic NOD/ShiLtJ mice was compared with non-diabetic CD1 mice as an in vivo model of S. aureus orthopaedic infection of bone and soft tissues after femur intramedullary pin implantation. We tested control and infected groups with 1×103 colony-forming units of S. aureus ATCC 25923 strain injected in the implant site. At 4 weeks post-inoculation, host response to infection, microbial biofilm formation, and bone damage were assessed by traditional diagnostic parameters (bacterial culture, C-reactive protein and white blood cell count), histological analysis and imaging techniques (micro computed tomography and scanning electron microscopy). Results Unlike the controls and the CD1 mice, all the diabetic mice challenged with a single inoculum of S. aureus displayed severe osteomyelitic changes around the implant. Conclusions Our findings demonstrate for the first time that the diabetic mouse can be successfully used in a model of orthopaedic implant-related infection. Furthermore, the same bacteria inoculum induced periprosthetic infection in all the diabetic mice but not in the controls. This animal model of implant-related infection in diabetes may be a useful tool to test in vivo treatments in diabetic and non-diabetic individuals.
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Affiliation(s)
- Arianna B Lovati
- Cell and Tissue Engineering Laboratory, Gruppo Ospedaliero San Donato Foundation, Milan, Italy.
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14
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Hu H, Jin X, Jiang H, Hu X, Han C. An observational study of foot ulceration risk in diabetic patients evaluated with autofluorescence: 195 cases cross-sectional and one-year outcome. Int J Diabetes Dev Ctries 2012. [DOI: 10.1007/s13410-012-0098-7] [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: 10/27/2022] Open
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15
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Kota SK, Meher LK, Jammula S, Kota SK, Krishna SVS, Modi KD. Aberrant angiogenesis: The gateway to diabetic complications. Indian J Endocrinol Metab 2012; 16:918-930. [PMID: 23226636 PMCID: PMC3510961 DOI: 10.4103/2230-8210.102992] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Diabetes Mellitus is a metabolic cum vascular syndrome with resultant abnormalities in both micro- and macrovasculature. The adverse long-term effects of diabetes mellitus have been described to involve many organ systems. Apart from hyperglycemia, abnormalities of angiogenesis may cause or contribute toward many of the clinical manifestations of diabetes. These are implicated in the pathogenesis of vascular abnormalities of the retina, kidneys, and fetus, impaired wound healing, increased risk of rejection of transplanted organs, and impaired formation of coronary collaterals. A perplexing feature of the aberrant angiogenesis is that excessive and insufficient angiogenesis can occur in different organs in the same individual. The current article hereby reviews the molecular mechanisms including abnormalities in growth factors, cytokines, and metabolic derangements, clinical implications, and therapeutic options of dealing with abnormal angiogenesis in diabetes.
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Affiliation(s)
- Sunil K. Kota
- Department of Endocrinology, Medwin Hospital, Hyderabad, Andhra Pradesh, India
| | - Lalit K. Meher
- Department of Medicine, MKCG Medical College, Berhampur, Orissa, India
| | - Sruti Jammula
- Department of Pharmaceutics, Roland Institute of Pharmaceutical Sciences, Berhampur, Orissa, India
| | - Siva K. Kota
- Department of Anesthesia, Central Security Hospital, Riyadh, Saudi Arabia
| | - S. V. S. Krishna
- Department of Endocrinology, Medwin Hospital, Hyderabad, Andhra Pradesh, India
| | - Kirtikumar D. Modi
- Department of Endocrinology, Medwin Hospital, Hyderabad, Andhra Pradesh, India
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16
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Strunz CMC, Matsuda M, Salemi VMC, Nogueira A, Mansur AP, Cestari IN, Marquezini MV. Changes in cardiac heparan sulfate proteoglycan expression and streptozotocin-induced diastolic dysfunction in rats. Cardiovasc Diabetol 2011; 10:35. [PMID: 21518435 PMCID: PMC3100243 DOI: 10.1186/1475-2840-10-35] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Accepted: 04/25/2011] [Indexed: 02/02/2023] Open
Abstract
Background Changes in the proteoglycans glypican and syndecan-4 have been reported in several pathological conditions, but little is known about their expression in the heart during diabetes. The aim of this study was to investigate in vivo heart function changes and alterations in mRNA expression and protein levels of glypican-1 and syndecan-4 in cardiac and skeletal muscles during streptozotocin (STZ)-induced diabetes. Methods Diabetes was induced in male Wistar rats by STZ administration. The rats were assigned to one of the following groups: control (sham injection), after 24 hours, 10 days, or 30 days of STZ administration. Echocardiography was performed in the control and STZ 10-day groups. Western and Northern blots were used to quantify protein and mRNA levels in all groups. Immunohistochemistry was performed in the control and 30-day groups to correlate the observed mRNA changes to the protein expression. Results In vivo cardiac functional analysis performed using echocardiography in the 10-day group showed diastolic dysfunction with alterations in the peak velocity of early (E) diastolic filling and isovolumic relaxation time (IVRT) indices. These functional alterations observed in the STZ 10-day group correlated with the concomitant increase in syndecan-4 and glypican-1 protein expression. Cardiac glypican-1 mRNA and skeletal syndecan-4 mRNA and protein levels increased in the STZ 30-day group. On the other hand, the amount of glypican in skeletal muscle was lower than that in the control group. The same results were obtained from immunohistochemistry analysis. Conclusion Our data suggest that membrane proteoglycans participate in the sequence of events triggered by diabetes and inflicted on cardiac and skeletal muscles.
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Affiliation(s)
- Célia M C Strunz
- Heart Institute, University of São Paulo Medical School, São Paulo 05403-000, Brazil.
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17
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Advanced glycation end products of human β₂ glycoprotein I modulate the maturation and function of DCs. Blood 2011; 117:6152-61. [PMID: 21498672 DOI: 10.1182/blood-2010-12-325514] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In chronic disorders related to endothelial cell dysfunction, plasma β₂ glycoprotein I (β₂GPI) plays a role as a target antigen of pathogenetic autoimmune responses. However, information is still lacking to clarify why β₂GPI triggers autoimmunity. It is possible that posttranslational modification of the protein, such as nonenzymatic glycosylation, leads to the formation of advanced glycation end products (AGEs). The aim of our study was to explore whether glucose-modified β₂GPI is able to interact and activate monocyte-derived immature dendritic cells (iDCs) from healthy human donors. SDS-PAGE and spectrofluorometric analyses indicated that β₂GPI incubated with glucose was sugar modified, and that this modification likely consisted of AGE formation, resulting in AGE-β₂GPI. AGE-β₂GPI caused phenotypical and functional maturation of iDCs involving the activation of p38 MAPK, ERK, and NF-κB. It also induced on DCs a significant up-regulation of RAGE, the receptor for AGEs. Evidence for RAGE involvement comes from blocking experiments with an anti-RAGE mAb, confocal analysis, and coimmunoprecipitation experiments. AGE-β₂GPI-stimulated DCs had increased allostimulatory ability and primed naive T lymphocytes toward a Th2 polarization. These findings might explain in part the interactive role of β₂GPI, AGEs, and DCs in chronic disorders related to endothelial cell dysfunction.
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18
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Papachroni KK, Piperi C, Levidou G, Korkolopoulou P, Pawelczyk L, Diamanti-Kandarakis E, Papavassiliou AG. Lysyl oxidase interacts with AGE signalling to modulate collagen synthesis in polycystic ovarian tissue. J Cell Mol Med 2011; 14:2460-9. [PMID: 19583806 PMCID: PMC3823163 DOI: 10.1111/j.1582-4934.2009.00841.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Connective tissue components – collagen types I, III and IV – surrounding the ovarian follicles undergo drastic changes during ovulation. Abnormal collagen synthesis and increased volume and density of ovarian stroma characterize the polycystic ovary syndrome (PCOS). During the ovulatory process, collagen synthesis is regulated by prolyl hydroxylase and lysyl oxidase (LOX) activity in ovarian follicles. LOX catalyzes collagen and elastin cross-linking and plays essential role in coordinating the control of ovarian extracellular matrix (ECM) during follicular development. We have recently shown accumulation of advanced glycation end products (AGEs), molecules that stimulate ECM production and abnormal collagen cross-linking, in ovarian tissue. However, the possible link between LOX and AGEs-induced signalling in collagen production and stroma formation in ovarian tissue from PCOS remains elusive. The present study investigates the hypothesis of AGE signalling pathway interaction with LOX gene activity in polycystic ovarian (PCO) tissue. We show an increased distribution and co-localization of LOX, collagen type IV and AGE molecules in the PCO tissue compared to control, as well as augmented expression of AGE signalling mediators/effectors, phospho(p)-ERK, phospho(p)-c-Jun and nuclear factor κB (NF-κB) in pathological tissue. Moreover, we demonstrate binding of AGE-induced transcription factors, NF-κB and activator protein-1 (AP-1) on LOX promoter, indicating a possible involvement of AGEs in LOX gene regulation, which may account for the documented increase in LOX mRNA and protein levels compared to control. These findings suggest that deposition of excess collagen in PCO tissue that induces cystogenesis may, in part, be due to AGE-mediated stimulation of LOX activity.
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Affiliation(s)
- Katerina K Papachroni
- Department of Biological Chemistry, Medical School, University of Athens, Athens, Greece
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19
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Xiao J, Lv Y, Lin S, Jin L, Zhang Y, Wang X, Ma J, Hu K, Feng W, Cai L, Li X, Tan Y. Cardiac Protection by Basic Fibroblast Growth Factor from Ischemia/Reperfusion-Induced Injury in Diabetic Rats. Biol Pharm Bull 2010; 33:444-9. [DOI: 10.1248/bpb.33.444] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Jian Xiao
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical College
- Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical College
| | - Yanxia Lv
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical College
- Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical College
| | - Shaoqiang Lin
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical College
- Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical College
| | - Litai Jin
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical College
- Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical College
| | - Yi Zhang
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical College
- Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical College
| | - Xiaojie Wang
- Biopharmaceutics and Bioreactor Research Center, Ministry of Education, Jilin Agriculture University
| | - Jisheng Ma
- Biopharmaceutics and Bioreactor Research Center, Ministry of Education, Jilin Agriculture University
| | - Keqiong Hu
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical College
- Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical College
| | - Wenke Feng
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical College
- Department of Pediatrics, University of Louisville
| | - Lu Cai
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical College
- Department of Pediatrics, University of Louisville
| | - Xiaokun Li
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical College
- Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical College
- Biopharmaceutics and Bioreactor Research Center, Ministry of Education, Jilin Agriculture University
| | - Yi Tan
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical College
- Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical College
- Department of Pediatrics, University of Louisville
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21
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D'Souza DR, Salib MM, Bennett J, Mochin-Peters M, Asrani K, Goldblum SE, Renoud KJ, Shapiro P, Passaniti A. Hyperglycemia regulates RUNX2 activation and cellular wound healing through the aldose reductase polyol pathway. J Biol Chem 2009; 284:17947-55. [PMID: 19383984 DOI: 10.1074/jbc.m109.002378] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Diabetes mellitus accelerates cardiovascular microangiopathies and atherosclerosis, which are a consequence of hyperglycemia. The aldose reductase (AR) polyol pathway contributes to these microvascular complications, but how it mediates vascular damage in response to hyperglycemia is less understood. The RUNX2 transcription factor, which is repressed in diabetic animals, promotes vascular endothelial cell (EC) migration, proliferation, and angiogenesis. Here we show that physiological levels of glucose (euglycemia) increase RUNX2 DNA binding and transcriptional activity, whereas hyperglycemia does not. However, inhibition of AR reverses hyperglycemic suppression of RUNX2. IGF-1 secretion and IGF receptor phosphorylation by autocrine IGF-1 occur equally in euglycemic or hyperglycemic conditions, suggesting that reduced RUNX2 activity in response to hyperglycemia is not because of altered IGF-1/IGF receptor activation. AR also negatively regulates RUNX2-dependent vascular remodeling in an EC wounded monolayer assay, which is reversed by specific AR inhibition in hyperglycemia. Thus, euglycemia supports RUNX2 activity and promotes normal microvascular EC migration and wound healing, which are repressed under hyperglycemic conditions through the AR polyol pathway.
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Affiliation(s)
- David R D'Souza
- Department of Pathology, Graduate Program in Life Sciences, Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Pharmacy, Baltimore, Maryland 21201, USA
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22
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Improved cutaneous healing in diabetic mice exposed to healthy peripheral circulation. J Invest Dermatol 2009; 129:2265-74. [PMID: 19295612 DOI: 10.1038/jid.2009.60] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Impaired repair of skin defects is a major complication of diabetes; yet, the pathophysiology of diabetic (db) wound healing remains largely opaque. Here, we investigate the role of humoral factors in modulating db wound repair by generating chimeric animals through parabiotic joining of wild-type (wt) and diabetic (db/db) mice. This strategy allows wounds on healing-deficient db/db mice to be exposed to factors derived from the wt circulation at physiologically appropriate concentrations. When compared with db controls, chimeric db/db animals showed significantly improved healing of full-thickness, cutaneous wounds, with enhanced granulation tissue formation, angiogenesis, cell proliferation, and collagen deposition. Glycemic control was unaffected by parabiosis; however, the distribution of circulating leukocytes, altered in db controls, normalized in db-chimeras. Both wt and db cells were recruited from circulation into db wounds, but wt cells never exceeded 20% of total cells. Improved angiogenesis persisted in db-chimeras separated 24 hours after wounding, suggesting the existence of long-term normalizing factors. This study establishes a new model for studying db wound healing, and shows a key role for circulating factors in normalizing wound repair in diabetes.
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23
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Ahmed U, Dobler D, Larkin SJ, Rabbani N, Thornalley PJ. Reversal of hyperglycemia-induced angiogenesis deficit of human endothelial cells by overexpression of glyoxalase 1 in vitro. Ann N Y Acad Sci 2008; 1126:262-4. [PMID: 18448827 DOI: 10.1196/annals.1433.035] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Dicarbonyl glycation of RGD and GFOGER sites in type IV collagen has been associated with decreased angiogenesis. In this study, we investigated whether overexpression of glyoxalase 1 to decrease dicarbonyl glycation would prevent the angiogenesis deficit induced by hyperglycemia in vitro. Transfection of human microvascular endothelial cells resulted in a four-fold increase in glyoxalase 1 activity compared with controls. Incubation of human microvascular endothelial cells in model hyperglycemia produced a 32% decrease in formation of tube structures that was prevented by glyoxalase 1 overexpression. We conclude that increased protection against dicarbonyl glycation of endothelial cell protein protects hyperglycemia-induced angiogenesis deficit.
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Affiliation(s)
- Usman Ahmed
- Department of Biological Sciences, University of Essex, Colchester, United Kingdom
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Huang Y, Marui A, Sakaguchi H, Esaki J, Arai Y, Hirose K, Bir SC, Horiuchi H, Maruyama T, Ikeda T, Tabata Y, Komeda M. Sustained Release of Prostaglandin E1 Potentiates the Impaired Therapeutic Angiogenesis by Basic Fibroblast Growth Factor in Diabetic Murine Hindlimb Ischemia. Circ J 2008; 72:1693-9. [DOI: 10.1253/circj.cj-07-0960] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yuhong Huang
- Department of Cardiovascular Surgery, Kyoto University Graduate School of Medicine
| | - Akira Marui
- Department of Cardiovascular Surgery, Kyoto University Graduate School of Medicine
| | - Hisashi Sakaguchi
- Department of Cardiovascular Surgery, Kyoto University Graduate School of Medicine
| | - Jiro Esaki
- Department of Cardiovascular Surgery, Kyoto University Graduate School of Medicine
| | - Yoshio Arai
- Department of Cardiovascular Surgery, Kyoto University Graduate School of Medicine
| | - Keiichi Hirose
- Department of Cardiovascular Surgery, Kyoto University Graduate School of Medicine
| | - Shyamal Chandra Bir
- Department of Cardiovascular Surgery, Kyoto University Graduate School of Medicine
| | - Hisanori Horiuchi
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine
| | | | - Tadashi Ikeda
- Department of Cardiovascular Surgery, Kyoto University Graduate School of Medicine
| | - Yasuhiko Tabata
- Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto University
| | - Masashi Komeda
- Department of Cardiovascular Surgery, Kyoto University Graduate School of Medicine
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Kuo PC, Kao CH, Chen JK. Glycated type 1 collagen induces endothelial dysfunction in culture. In Vitro Cell Dev Biol Anim 2007; 43:338-43. [PMID: 17912594 DOI: 10.1007/s11626-007-9058-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2007] [Accepted: 08/10/2007] [Indexed: 01/08/2023]
Abstract
Hyperglycemia-induced protein glycation is thought to be implicated in the diabetic vasculopathy. In this study, we cultured vascular endothelial cells on native or glycated collagen matrix and compared their growth and functional characteristics. At lower plating density, the cells grew equally well on both substrata; however, at higher planting density, the cells plated on glycated collagen grew slower and reached a lower confluent density compared to that of the native collagen-based cultures. Confluent cell layers formed on glycated collagen exhibited a lower diffusion barrier function and a less response to epidermal growth factor stimulated prostacyclin production, compared to their native collagen-cultured counterparts.
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Affiliation(s)
- Pei-Ching Kuo
- Department of Physiology, College of Medicine, Chang Gung University, Kweishan, Taoyuan, 333, Taiwan
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26
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Yu LC, Chen SC, Chang WC, Huang YC, Lin KM, Lai PH, Sung HW. Stability of angiogenic agents, ginsenoside Rg1 and Re, isolated from Panax ginseng: In vitro and in vivo studies. Int J Pharm 2007; 328:168-76. [PMID: 16962729 DOI: 10.1016/j.ijpharm.2006.08.009] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2006] [Revised: 05/18/2006] [Accepted: 08/08/2006] [Indexed: 11/22/2022]
Abstract
The study was designed to investigate the stability of ginsenoside Rg(1) (Rg(1)) and Re (Re), two natural herbal compounds isolated from Panax ginseng, based on their activity to promote angiogenesis in vitro and in vivo. After being treated at different temperatures, pHs, and solvent species for distinct durations, the remaining activities of Rg(1) and Re on human umbilical vein endothelial cell (HUVEC) proliferation, migration, and tube formation were examined in vitro. Additionally, the remaining activity of each treated test agent, mixed in a growth factor-reduced Matrigel, in stimulating angiogenesis was evaluated subcutaneously in a mouse model. Basic fibroblast growth factor (bFGF) was used as a control. It was found in vitro that HUVEC proliferation, migration in a Transwell plate, and tube formation on Matrigel were all significantly enhanced in the presence of bFGF, Rg(1), or Re. However, after being treated at different temperatures, pHs, or solvent species, the remaining activity of bFGF on HUVEC behaviors reduced significantly. This observation was more significant with increasing the duration of treatment. In contrast, the activities of Rg(1) and Re remained unchanged throughout the entire course of the study. The in vivo results observed on day 7 after implantation showed that the blank control (Matrigel alone) was slightly vascularized. In contrast, the density of neo-vessels in the Matrigel plug mixed with bFGF, Rg(1), or Re was significantly enhanced. However, after being treated, the density of neo-vessels was significantly reduced in the Matrigel plug mixed with bFGF, while those of Rg(1) and Re remained unchanged. The aforementioned results suggested that Rg(1) and Re could be a novel group of nonpeptide angiogenic agents with a superior stability and may be used for the management of tissue regeneration.
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Affiliation(s)
- Lin-Chien Yu
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC
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Kuhn J, Schnölzer M, Schön S, Müller S, Prante C, Götting C, Kleesiek K. Xylosyltransferase I acceptor properties of fibroblast growth factor and its fragment bFGF (1-24). Biochem Biophys Res Commun 2005; 333:156-66. [PMID: 15936726 DOI: 10.1016/j.bbrc.2005.05.087] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2005] [Accepted: 05/18/2005] [Indexed: 11/21/2022]
Abstract
Human basic fibroblast growth factor (bFGF) is a heparin-binding growth factor containing a G-S-G-motif which is a potential recognition sequence of xylosyltransferase I (XT-I). Here, we show that the recombinant human bFGF was xylosylated in vitro by human XT-I and that the fragment bFGF (1-24) is a good XT-I acceptor (K(m) = 20.8 microM for native XT-I and K(m) = 22.3 microM for recombinant XT-I). MALDI and MALDI-PSD time-of-flight mass spectrometric analyses of the xylosylated bFGF protein demonstrate the transfer of xylose to the serine residue of the G-S-G-motif in the amino terminal end of bFGF. The peptide bFGF (1-24) is well suitable as an acceptor substrate for XT-I and can be used in a radiochemical assay to measure the XT-I activity in cell culture supernatant and human body fluids, respectively. Furthermore, we could demonstrate that the XT-I interacts strongly with heparin and that this glycosaminoglycan is a predominantly non-competitive inhibitor of the enzyme using the fragment bFGF (1-24) as xylose acceptor.
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Affiliation(s)
- Joachim Kuhn
- Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany.
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28
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Huang YC, Chen CT, Chen SC, Lai PH, Liang HC, Chang Y, Yu LC, Sung HW. A Natural Compound (Ginsenoside Re) Isolated from Panax ginseng as a Novel Angiogenic Agent for Tissue Regeneration. Pharm Res 2005; 22:636-46. [PMID: 15846472 DOI: 10.1007/s11095-005-2500-3] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2004] [Accepted: 12/17/2004] [Indexed: 10/25/2022]
Abstract
PURPOSE The primary challenge for tissue engineering is to develop a vascular supply that can support the metabolic needs of the engineered tissues in an extracellular matrix. In this study, the feasibility of using a natural compound, ginsenoside Re, isolated from Panax ginseng in stimulating angiogenesis and for tissue regeneration was evaluated. METHODS Effects of ginsenoside Re on the proliferation, migration, and tube formation of human umbilical vein endothelial cells (HUVECs) were examined in vitro. Additionally, angiogenesis and tissue regeneration in a genipin-fixed porous acellular bovine pericardium (extracellular matrix; ECM) incorporated with ginsenoside Re implanted subcutaneously in a rat model were investigated. Basic fibroblast growth factor (bFGF) was used as a control. RESULTS It was found that HUVEC proliferation, migration in a Transwell plate, and tube formation on Matrigel were all significantly enhanced in the presence of bFGF or ginsenoside Re. Additionally, effects of ginsenoside Re on HUVEC proliferation, migration, and tube formation were dose-dependent and reached a maximal level at a concentration of about 30 microg/ml. The in vivo results obtained at 1 week postoperatively showed that the density of neocapillaries and the tissue hemoglobin content in the ECMs were significantly enhanced by bFGF or ginsenoside Re. These results indicated that angiogenesis in the ECMs was significantly enhanced by loading with bFGF or ginsenoside Re. At 1 month postoperatively, vascularzied neo-connective-tissue fibrils were found to fill the pores in the ECMs loaded with bFGF or ginsenoside Re. CONCLUSIONS The aforementioned results indicated that like bFGF, ginsenoside Re-associated induction of angiogenesis enhanced tissue regeneration, supporting the concept of therapeutic angiogenesis in tissue-engineering strategies.
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Affiliation(s)
- Ya-Chun Huang
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
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29
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Stitt AW, McGoldrick C, Rice-McCaldin A, McCance DR, Glenn JV, Hsu DK, Liu FT, Thorpe SR, Gardiner TA. Impaired retinal angiogenesis in diabetes: role of advanced glycation end products and galectin-3. Diabetes 2005; 54:785-94. [PMID: 15734857 DOI: 10.2337/diabetes.54.3.785] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Suppression of angiogenesis during diabetes is a recognized phenomenon but is less appreciated within the context of diabetic retinopathy. The current study has investigated regulation of retinal angiogenesis by diabetic serum and determined if advanced glycation end products (AGEs) could modulate this response, possibly via AGE-receptor interactions. A novel in vitro model of retinal angiogenesis was developed and the ability of diabetic sera to regulate this process was quantified. AGE-modified serum albumin was prepared according to a range of protocols, and these were also analyzed along with neutralization of the AGE receptors galectin-3 and RAGE. Retinal ischemia and neovascularization were also studied in a murine model of oxygen-induced proliferative retinopathy (OIR) in wild-type and galectin-3 knockout mice (gal3(-/-)) after perfusion of preformed AGEs. Serum from nondiabetic patients showed significantly more angiogenic potential than diabetic serum (P < 0.0001) and within the diabetic group, poor glycemic control resulted in more AGEs but less angiogenic potential than tight control (P < 0.01). AGE-modified albumin caused a dose-dependent inhibition of angiogenesis (P < 0.001), and AGE receptor neutralization significantly reversed the AGE-mediated suppression of angiogenesis (P < 0.01). AGE-treated wild-type mice showed a significant increase in inner retinal ischemia and a reduction in neovascularization compared with non-AGE controls (P < 0.001). However, ablation of galectin-3 abolished the AGE-mediated increase in retinal ischemia and restored the neovascular response to that seen in controls. The data suggest a significant suppression of angiogenesis by the retinal microvasculature during diabetes and implicate AGEs and AGE-receptor interactions in its causation.
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Affiliation(s)
- Alan W Stitt
- Ophthalmic and Vision Science Research Centre, Queens University Belfast, Royal Victoria Hospital, Grosvenor Road, Belfast, BT12 6BA, Northern Ireland.
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Abstract
The advanced glycation end products (AGEs) are a heterogeneous class of molecules, including the following main subgroups: bis(lysyl)imidazolium cross-links, hydroimidazolones, 3-deoxyglucosone derivatives, and monolysyl adducts. AGEs are increased in diabetes, renal failure, and aging. Microvascular lesions correlate with the accumulation of AGEs, as demonstrated in diabetic retinopathy or renal glomerulosclerosis. On endothelial cells, ligation of receptor for AGE (RAGE) by AGEs induces the expression of cell adhesion molecules, tissue factor, cytokines such as interleukin-6, and monocyte chemoattractant protein-1. A chief means by which AGEs via RAGE exert their effects is by generation of reactive oxygen species, at least in part via stimulation of NADPH oxidase. Diabetes-associated vascular dysfunction in vivo can be prevented by blockade of RAGE. Thus, agents that limit AGE formation, increase the catabolism of these species, or antagonize their binding to RAGE may provide new targets for vascular protection in diabetes.
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Affiliation(s)
- Jean-Luc Wautier
- University Lariboisiere-Saint Louis and Institut National de la Transfusion Sanguine, Paris, France
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31
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Aguzzi MS, Facchiano F, Ribatti D, Gaeta R, Casadio R, Rossi I, Capogrossi MC, Facchiano A. A novel RGDS-analog inhibits angiogenesis in vitro and in vivo. Biochem Biophys Res Commun 2004; 321:809-14. [PMID: 15358099 DOI: 10.1016/j.bbrc.2004.07.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2004] [Indexed: 11/28/2022]
Abstract
In this study the anti-angiogenic action of a novel non-peptide RGDS-analog named RAM was tested in vitro and in vivo. RAM inhibited FGF-2-induced chemotaxis by 80% in an adhesion-independent way. Further, it induced HUVEC-apoptosis in collagen-seeded HUVEC, indicating that such pro-apoptotic effect was adhesion-independent. In vivo studies revealed that RAM inhibited FGF-2 induced angiogenesis by 60% in the mouse Matrigel-assay and in the chicken-egg chorion-allantoic membrane assay. Finally, RAM was markedly more stable in serum as compared to the template RGDS and after 24 h incubation in 100% serum was significantly more active than RGDS. Taken together these results show that RAM exerts anti-chemotactic and pro-apoptotic effects, by an unexpected adhesion-independent mechanism, as we have recently shown for the template RGDS molecule [Blood 103 (2004) 4180], and has in vivo relevant anti-angiogenic properties, with marked stability in serum; therefore, RAM represents a novel promising anti-angiogenic molecule.
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Affiliation(s)
- M S Aguzzi
- Laboratorio di Patologia Vascolare, Istituto Dermopatico della Immacolata, IDI, IRCCS, Rome, Italy
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Harsch IA, Brzozowski T, Bazela K, Konturek SJ, Kukharsky V, Pawlik T, Pawlowski E, Hahn EG, Konturek PC. Impaired gastric ulcer healing in diabetic rats: role of heat shock protein, growth factors, prostaglandins and proinflammatory cytokines. Eur J Pharmacol 2004; 481:249-60. [PMID: 14642793 DOI: 10.1016/j.ejphar.2003.09.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Gastric mucosa of diabetic rats is highly vulnerable to acute injury, but little is known about the influence of diabetic conditions on the healing of gastric ulcers. In this study, streptozotocin (70 mg/kg injected intraperitoneally) was used to induce diabetes mellitus in rats. Four weeks after streptozotocin injection, gastric ulcers were induced using the acetic acid method, and 10 days later, the healing rate and the gastric blood flow (GBF) were measured by planimetry and hydrogen (H(2))-gas clearance method, respectively. Six major groups of rats with gastric ulcers were used: (1) vehicle (saline); (2) streptozotocin alone; (3) insulin (4 IU/day intraperitoneally); (4) streptozotocin plus insulin; (5) pentoxifylline, an inhibitor of synthesis and release of tumor necrosis factor-alpha (TNF alpha); and (6) aspirin, a non-selective inhibitor of cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2), and rofecoxib, the highly selective COX-2. In the diabetic rats, a significant delay in ulcer healing ( approximately by 300%), accompanied by a decrease in the gastric mucosal blood flow was observed. The prolongation of the healing in diabetic animals was associated with an increase in gastric mucosal expression and release of TNFalpha, interleukin-1 beta (IL-1 beta), suppression of the vascular endothelial growth factor (VEGF), platelet endothelial cell adhesion molecule-1 (PECAM-1) and the mucosal overexpression of heat shock protein 70 (HSP 70). Administration of insulin reversed the delay in ulcer healing and significantly decreased the expression of IL-1 beta and TNF-alpha, while producing the rise in the expression of VEGF and PECAM. Pentoxifylline, an inhibitor of TNF-alpha, which by itself accelerated ulcer healing in non-diabetic rats, counteracted the increase in the area of gastric ulcer induced by streptozotocin, raised significantly gastric blood flow and suppressed the plasma TNF-alpha levels. Aspirin and rofecoxib, that significantly suppressed the mucosal prostaglandin E(2) generation in ulcer area, delayed significantly the rate of ulcer healing and decreased the GBF at ulcer margin in non-diabetic rats, and these changes were significantly augmented in diabetic animals. We conclude that: (1) Experimental diabetes dramatically impairs ulcer healing, depending upon the increased release of proinflammatory cytokines and the attenuation of angiogenesis that can limit the ulcer healing effects of locally produced HSP 70 and TNF-alpha. (2) Insulin reversed this impairment of ulcer healing in diabetic rats, mainly due to the enhancement of angiogenesis and reduction in expression of cytokines in the ulcer area. (3) Classic non-steroidal anti-inflammatory drugs such as aspirin prolonged ulcer healing under diabetic conditions due to suppression of endogenous prostaglandins and the fall in the microcirculation at the ulcer margin and these effects were mimicked by selective, so called "safe" COX-2 inhibitor, rofecoxib, suggesting that both COX isoforms are important sources of prostaglandins that are essential in the ulcer healing in diabetes.
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Affiliation(s)
- Igor A Harsch
- First Department of Medicine I, University Erlangen-Nuremberg, Ulmenweg 18, 91054 Erlangen, Germany
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De Falco E, Porcelli D, Torella AR, Straino S, Iachininoto MG, Orlandi A, Truffa S, Biglioli P, Napolitano M, Capogrossi MC, Pesce M. SDF-1 involvement in endothelial phenotype and ischemia-induced recruitment of bone marrow progenitor cells. Blood 2004; 104:3472-82. [PMID: 15284120 DOI: 10.1182/blood-2003-12-4423] [Citation(s) in RCA: 413] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Chemokine stromal derived factor 1 (SDF-1) is involved in trafficking of hematopoietic stem cells (HSCs) from the bone marrow (BM) to peripheral blood (PB) and has been found to enhance postischemia angiogenesis. This study was aimed at investigating whether SDF-1 plays a role in differentiation of BM-derived c-kit(+) stem cells into endothelial progenitor cells (EPCs) and in ischemia-induced trafficking of stem cells from PB to ischemic tissues. We found that SDF-1 enhanced EPC number by promoting alpha(2), alpha(4), and alpha(5) integrin-mediated adhesion to fibronectin and collagen I. EPC differentiation was reduced in mitogen-stimulated c-kit(+) cells, while cytokine withdrawal or the overexpression of the cyclin-dependent kinase (CDK) inhibitor p16(INK4) restored such differentiation, suggesting a link between control of cell cycle and EPC differentiation. We also analyzed the time course of SDF-1 expression in a mouse model of hind-limb ischemia. Shortly after femoral artery dissection, plasma SDF-1 levels were up-regulated, while SDF-1 expression in the bone marrow was down-regulated in a timely fashion with the increase in the percentage of PB progenitor cells. An increase in ischemic tissue expression of SDF-1 at RNA and protein level was also observed. Finally, using an in vivo assay such as injection of matrigel plugs, we found that SDF-1 improves formation of tubulelike structures by coinjected c-kit(+) cells. Our findings unravel a function for SDF-1 in increase of EPC number and formation of vascular structures by bone marrow progenitor cells.
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Affiliation(s)
- Elena De Falco
- Laboratorio di Patologia Vascolare, Istituto Dermopatico dell'Immacolata-Istituto di Ricovero e Cura a Carattere Scientifico, Rome, Italy
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Collinson DJ, Donnelly R. Therapeutic Angiogenesis in Peripheral Arterial Disease: Can Biotechnology Produce an Effective Collateral Circulation? Eur J Vasc Endovasc Surg 2004; 28:9-23. [PMID: 15177227 DOI: 10.1016/j.ejvs.2004.03.021] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/30/2004] [Indexed: 11/23/2022]
Abstract
The physiological processes of angiogenesis, vasculogenesis and arteriogenesis contribute to the growth of collateral vessels in response to obstructive arterial disease causing lower limb or myocardial ischaemia, but in clinical practice the endogenous angiogenic response is often suboptimal or impaired, e.g. by factors such as ageing, diabetes or drug therapies. Therapeutic angiogenesis is an application of biotechnology to stimulate new vessel formation via local administration of pro-angiogenic growth factors in the form of recombinant protein or gene therapy, or by implantation of endothelial progenitor cells that will synthesize multiple angiogenic cytokines. Numerous experimental and clinical studies have sought to establish 'proof of concept' for therapeutic angiogenesis in PAD and myocardial ischaemia using different treatment modalities, but the results have been inconsistent. This review summarises the mechanisms of angiogenesis and the results of recent trials evaluating the efficacy and safety of different gene therapy, recombinant protein and cellular-based treatment approaches to enhance collateral vessel formation.
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Affiliation(s)
- D J Collinson
- Centre for Integrated Systems Biology and Medicine, School of Medical and Surgical Sciences University of Nottingham, Nottingham, UK
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Sakurai T, Satake A, Sumi S, Inoue K, Nagata N, Tabata Y, Miyakoshi J. The efficient prevascularization induced by fibroblast growth factor 2 with a collagen-coated device improves the cell survival of a bioartificial pancreas. Pancreas 2004; 28:e70-9. [PMID: 15084987 DOI: 10.1097/00006676-200404000-00028] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVES The subcutaneous transplantation of a bioartificial pancreas is a very attractive cure for diabetes mellitus. We recently developed a new immunoisolatory device that has the ability to induce neovascularization for subcutaneous transplantation. We applied the newly developed device to subcutaneous transplantation of a bioartificial pancreas. METHODS We investigated the prevascularization-inducing activity of the device in diabetic rats by histologic analysis and evaluated the permeability of the device to insulin and BSA. We also evaluated the survival of cells enclosed in a bioartificial pancreas, which was composed of the device, from the viewpoint of the effects of prevascularization by semiquantitative RT-PCR. RESULTS The devices induced prevascularization more efficiently than fibroblast growth factor 2 impregnated in gelatin microspheres alone did and had more useful permeability than a noncollagen-coated device. Significantly higher expression of insulin mRNA was detected in the RT-PCR amplicons from cells retrieved from the bioartificial pancreas transplanted at the prevascularization-induced site as compared with at a nonprevascularization-induced site. CONCLUSION We demonstrated that our newly developed device has a superior ability to induce prevascularization in diabetic rats, and the prevascularization improves the initial cell survival of the implanted cells following transplantation.
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Affiliation(s)
- Tomonori Sakurai
- Department of Organ Reconstruction, Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
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MESH Headings
- Animals
- Collagen/genetics
- Collagen/metabolism
- Cytokines/genetics
- Cytokines/metabolism
- Diabetes Mellitus, Experimental/complications
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/prevention & control
- Gene Expression Regulation/drug effects
- Glycation End Products, Advanced/antagonists & inhibitors
- Glycation End Products, Advanced/metabolism
- Heart Ventricles/drug effects
- Heart Ventricles/metabolism
- Heart Ventricles/pathology
- Hypertrophy, Left Ventricular/etiology
- Hypertrophy, Left Ventricular/metabolism
- Hypertrophy, Left Ventricular/prevention & control
- Natriuretic Peptide, Brain/genetics
- Natriuretic Peptide, Brain/metabolism
- Receptor for Advanced Glycation End Products
- Receptors, Immunologic/genetics
- Receptors, Immunologic/metabolism
- Thiazoles/pharmacology
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Facchiano A, Russo K, Facchiano AM, De Marchis F, Facchiano F, Ribatti D, Aguzzi MS, Capogrossi MC. Identification of a novel domain of fibroblast growth factor 2 controlling its angiogenic properties. J Biol Chem 2003; 278:8751-60. [PMID: 12496262 DOI: 10.1074/jbc.m209936200] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Fibroblast growth factor 2 (FGF-2) is a potent factor modulating the activity of many cell types. Its dimerization and binding to high affinity receptors are considered to be necessary steps to induce FGF receptor phosphorylation and signaling activation. A structural analysis was carried out and a region encompassing residues 48-58 of human FGF-2 was identified, as potentially involved in FGF-2 dimerization. A peptide (FREG-48-58) derived from this region strongly and specifically inhibited FGF-2 induced proliferation and migration of primary bovine aorta endothelial cells (BAEC) in vitro, and markedly reduced FGF-2-dependent angiogenesis in two distinct in vivo assays. To further investigate the role of region 48-58, a polyclonal antibody raised against FREG-(48-58) was tested and was found to block FGF-2 action in vitro. Human FGF-2 has three histidine residues, one falling within the region 48-58. Chemical modification of histidine residues blocked FGF-2 activity and FREG-(48-58) inhibitory effect in vitro, indicating that histidine residues, in particular the one within FREG-(48-58) region, play a crucial role in the observed activity. Additional experiments showed that FREG-(48-58) specifically interacted with FGF-2, impaired FGF-2-interaction with itself, with heparin and with FGF receptor 1, and inhibited FGF-2-induced receptor phosphorylation and FGF-2 internalization. These data indicate for the first time that region 48-58 of FGF-2 is a functional domain controlling FGF-2 activity.
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Affiliation(s)
- Antonio Facchiano
- Laboratorio Patologia Vascolare, Istituto Dermopatico dell'Immacolata, IRCCS, 00167 Roma, Italy.
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