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Brondani LA, Crispim D, Pisco J, Guimarães JA, Berger M. The G Allele of the rs12050217 Polymorphism in the BDKRB1 Gene Is Associated with Protection for Diabetic Retinopathy. Curr Eye Res 2019; 44:994-999. [PMID: 31017477 DOI: 10.1080/02713683.2019.1610178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Purpose: The plasma kallikrein-kinin system is activated during vascular injury caused by diabetic retinopathy (DR), being involved in hyperpermeability and inflammation. Bradykinin B1 receptor (B1R) is expressed in human retina, and its levels are increased in murine models of diabetes. Experimental studies reveal that B1R antagonists ameliorate retinal injury caused by diabetes in rodents. Thus, the aim of this study was to investigate the association between the rs12050217A/G polymorphism in the BDKRB1 gene, the gene that codifies B1R, and DR in type 2 diabetes mellitus (T2DM) patients. Methods: We analyzed 636 T2DM patients and 443 non-diabetic subjects. T2DM patients were categorized by the presence of non-proliferative DR (NPDR, n = 267), proliferative DR (PDR, n = 197), and absence of DR (n = 172). The BDKRB1 rs12050217A/G polymorphism was genotyped by real-time PCR using TaqMan MGB probes. Results: The genotype frequencies of the BDKRB1 rs12050217A/G polymorphism are in Hardy-Weinberg equilibrium and did not differ between T2DM patients and non-diabetic subjects (P > 0.05). The presence of the genotypes containing the rs12050217 G allele was less frequent in patients with PDR when compared to patients with NPDR and without DR (32.0%, 41.9%, and 43.0%, P = 0.045, respectively). Interestingly, the presence of G allele was associated with ~40% protection for PDR, which was confirmed after correction for the presence of hypertension, ethnicity, age, HDL, and gender (odds ratio = 0.616, 95% confidence interval 0.385-0.986, P = 0.043). Conclusion: For the first time, we showed that BDKRB1 rs12050217 G allele is associated with protection for the advanced stage of DR in T2DM patients; however, further studies are needed to confirm this finding.
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Affiliation(s)
- Leticia A Brondani
- Endocrine Division, Hospital de Clínicas de Porto Alegre , Porto Alegre , Rio Grande do Sul , Brazil.,Postgraduate Program in Medical Science: Endocrinology, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| | - Daisy Crispim
- Endocrine Division, Hospital de Clínicas de Porto Alegre , Porto Alegre , Rio Grande do Sul , Brazil.,Postgraduate Program in Medical Science: Endocrinology, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| | - Julia Pisco
- Endocrine Division, Hospital de Clínicas de Porto Alegre , Porto Alegre , Rio Grande do Sul , Brazil
| | - Jorge A Guimarães
- Biochemical Pharmacology Lab, Center for Experimental Research, Hospital de Clínicas de Porto Alegre , Porto Alegre , Rio Grande do Sul , Brazil.,Postgraduate Program in Cell and Molecular Biology, Center of Biotechnology, Instituto de Biociências, Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| | - Markus Berger
- Biochemical Pharmacology Lab, Center for Experimental Research, Hospital de Clínicas de Porto Alegre , Porto Alegre , Rio Grande do Sul , Brazil.,Postgraduate Program in Health Sciences: Gynecology and Obstetrics, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
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Ghanem HB, Elsheikh M, El-Benhawy SA, Shahba A. Adipocytokines, inflammatory, epigenetic instability & angiogenesis biomarkers in type 2 diabetic Egyptian women with breast cancer. Diabetes Metab Syndr 2019; 13:24-29. [PMID: 30641704 DOI: 10.1016/j.dsx.2018.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 08/09/2018] [Indexed: 01/02/2023]
Abstract
Obesity is the main determinant of type 2 diabetes. Some adipocytokines play important roles in diabetic complications. Lipid transport is an important aspect of lipid metabolism in cancer. Present study aimed to evaluate the effect of some adipocytokines, inflammatory, epigenetic instability & angiogenesis biomarkers in type 2 diabetic Egyptian women with breast cancer. Study Design was performed on eighty females divided into 20 healthy subjects (Group I), 20 patients with type 2 diabetes (Group II), 20 patients with breast cancer (Group III) & 20 patients with diabetes and breast cancer (Group IV). Demographic data & body mass index have been collected. Biochemical analysis included fasting & postprandial blood glucose, lipid profile, fatty acid-binding proteins-4 (FABP-4), tumor necrosis factor-α (TNF-α), vascular endothelial growth factor (VEGF), 8-hydroxy-2'-deoxyguanosine (8-OHdG) & thioredoxin reductase (TrxR) activity. Results revealed significant increase in FABP-4, TNF-α, VEGF, 8-OHdG and significant decreased TrxR activity in diabetic patients with breast cancer in comparison with other groups. These changes were evident in breast cancer subjects than diabetic and healthy cases and in diabetic than healthy cases. Conclusion: This study confirmed the role of FABP-4 in pathogenesis of type 2 diabetes & breast cancer via enhancing angiogenesis, inflammatory and epigenetic instability biomarkers.
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Affiliation(s)
- Heba Bassiony Ghanem
- Medical Biochemistry Department, Faculty of Medicine, Tanta University, El-Geesh Street, Tanta, Egypt.
| | - Mohammed Elsheikh
- General Surgery Department, Faculty of Medicine, Tanta University, El-Geesh Street, Tanta, Egypt
| | - Sanaa Ali El-Benhawy
- Radiation Sciences Department, Medical Research Institute, Alexandria University, Alexandria, Egypt
| | - Abeer Shahba
- Internal Medicine Department, Faculty of Medicine, Tanta University, El-Geesh Street, Tanta, Egypt
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Hachana S, Bhat M, Sénécal J, Huppé-Gourgues F, Couture R, Vaucher E. Expression, distribution and function of kinin B 1 receptor in the rat diabetic retina. Br J Pharmacol 2018; 175:968-983. [PMID: 29285756 DOI: 10.1111/bph.14138] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 11/22/2017] [Accepted: 12/15/2017] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND AND PURPOSE The kinin B1 receptor contributes to vascular inflammation and blood-retinal barrier breakdown in diabetic retinopathy (DR). We investigated the changes in expression, cellular localization and vascular inflammatory effect of B1 receptors in retina of streptozotocin diabetic rats. EXPERIMENTAL APPROACH The distribution of B1 receptors on retinal cell types was investigated by immunocytochemistry. Effects of B1 receptor agonist, R-838, and antagonist, R-954, on retinal leukocyte adhesion, gene expression of kinin and VEGF systems, B1 receptor immunoreactivity, microgliosis and capillary leakage were measured. Effect of B1 receptor siRNA on gene expression was also assessed. KEY RESULTS mRNA levels of the kinin and VEGF systems were significantly enhanced at 2 weeks in streptozotocin (STZ)-retina compared to control-retina and were further increased at 6 weeks. B1 receptor mRNA levels remained increased at 6 months. B1 receptor immunolabelling was detected in vascular layers of the retina, on glial and ganglion cells. Intravitreal R-838 amplified B1 and B2 receptor gene expression, B1 receptor levels (immunodetection), leukostasis and vascular permeability at 2 weeks in STZ-retina. Topical application (eye drops) of R-954 reversed these increases in B1 receptors, leukostasis and vascular permeability. Intravitreal B1 receptor siRNA inhibited gene expression of kinin and VEGF systems in STZ-retina. Microgliosis was unaffected by R-838 or R-954 in STZ-retina. CONCLUSION AND IMPLICATIONS Our results support the detrimental role of B1 receptors on endothelial and glial cells in acute and advanced phases of DR. Topical application of the B1 receptor antagonist R-954 seems a feasible therapeutic approach for the treatment of DR.
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Affiliation(s)
- Soumaya Hachana
- École d'optométrie, Université de Montréal, Montréal, QC, Canada.,Département de Pharmacologie et Physiologie, Université de Montréal, Montréal, QC, Canada
| | - Menakshi Bhat
- École d'optométrie, Université de Montréal, Montréal, QC, Canada.,Département de Pharmacologie et Physiologie, Université de Montréal, Montréal, QC, Canada
| | - Jacques Sénécal
- Département de Pharmacologie et Physiologie, Université de Montréal, Montréal, QC, Canada
| | | | - Réjean Couture
- Département de Pharmacologie et Physiologie, Université de Montréal, Montréal, QC, Canada
| | - Elvire Vaucher
- École d'optométrie, Université de Montréal, Montréal, QC, Canada
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Abdel-Magid AF. Plasma Kallikrein Inhibitors for the Treatment of Retinal Vascular Permeability Associated with Diabetic Retinopathy and Diabetic Macular Edema. ACS Med Chem Lett 2017; 8:776-777. [PMID: 28835783 DOI: 10.1021/acsmedchemlett.7b00253] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Indexed: 11/29/2022] Open
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Bolinger MT, Antonetti DA. Moving Past Anti-VEGF: Novel Therapies for Treating Diabetic Retinopathy. Int J Mol Sci 2016; 17:E1498. [PMID: 27618014 PMCID: PMC5037775 DOI: 10.3390/ijms17091498] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 08/22/2016] [Accepted: 08/30/2016] [Indexed: 12/25/2022] Open
Abstract
Diabetic retinopathy is the leading cause of blindness in working age adults, and is projected to be a significant future health concern due to the rising incidence of diabetes. The recent advent of anti-vascular endothelial growth factor (VEGF) antibodies has revolutionized the treatment of diabetic retinopathy but a significant subset of patients fail to respond to treatment. Accumulating evidence indicates that inflammatory cytokines and chemokines other than VEGF may contribute to the disease process. The current review examines the presence of non-VEGF cytokines in the eyes of patients with diabetic retinopathy and highlights mechanistic pathways in relevant animal models. Finally, novel drug targets including components of the kinin-kallikrein system and emerging treatments such as anti-HPTP (human protein tyrosine phosphatase) β antibodies are discussed. Recognition of non-VEGF contributions to disease pathogenesis may lead to novel therapeutics to enhance existing treatments for patients who do not respond to anti-VEGF therapies.
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Affiliation(s)
- Mark T Bolinger
- Departments of Ophthalmology and Visual Sciences, Kellogg Eye Center, and Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48105, USA.
| | - David A Antonetti
- Departments of Ophthalmology and Visual Sciences, Kellogg Eye Center, and Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48105, USA.
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