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Jansook P, Loftsson T, Stefánsson E. Drug-like properties of tyrosine kinase inhibitors in ophthalmology: Formulation and topical availability. Int J Pharm 2024; 655:124018. [PMID: 38508428 DOI: 10.1016/j.ijpharm.2024.124018] [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: 01/22/2024] [Revised: 03/11/2024] [Accepted: 03/17/2024] [Indexed: 03/22/2024]
Abstract
Tyrosine kinase inhibitors (TKIs) can inhibit edema and neovascularization, such as in age-related macular degeneration and diabetic retinopathy. However, their topical administration in ophthalmology is limited by their toxicity and poor aqueous solubility. There are multiple types of TKIs, and each TKI has an affinity to more than one type of receptor. Studies have shown that ocular toxicity can be addressed by selecting TKIs that have a high affinity for specific vascular endothelial growth factor receptors (VEGFRs) but a low affinity for epidermal growth factor receptors (EGFRs). Drugs permeate from the aqueous tear fluid into the eye via passive diffusion. Thus, a sustained high concentration of the dissolved drug in the aqueous tear fluid is essential for a successful delivery to posterior tissues such as the retina. Unfortunately, the aqueous solubility of the TKIs that have the most favorable VEGFR/EGFR affinity ratio, that is, axitinib and cabozantinib, is well below 1 µg/mL, making their topical delivery very challenging. This is a review of the drug-like properties of TKIs that are currently being evaluated or have been evaluated as ophthalmic drugs. These properties include their solubilization, cyclodextrin complexation, and ability to permeate from the aqueous tear fluid to the posterior eye segment.
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Affiliation(s)
- Phatsawee Jansook
- Faculty of Pharmaceutical Sciences, Chulalongkorn University, 254 Payathai Road, Pathumwan, Bangkok, 10330, Thailand; Cyclodextrin Application and Nanotechnology-Based Delivery Systems Research Unit, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Thorsteinn Loftsson
- Faculty of Pharmaceutical Sciences, University of Iceland, Hofsvallagata 53, IS-107, Reykjavik, Iceland
| | - Einar Stefánsson
- Department of Ophthalmology, Landspitali University Hospital, IS-101 Reykjavik, Iceland
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2
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Madhusudhan S, Gupta NV, Rahamathulla M, Chidambaram SB, Osmani RAM, Ghazwani M, Ahmed MM, Farhana SA, Sarhan MY, Tousif AH. Subconjunctival Delivery of Sorafenib-Tosylate-Loaded Cubosomes for Facilitated Diabetic Retinopathy Treatment: Formulation Development, Evaluation, Pharmacokinetic and Pharmacodynamic (PKPD) Studies. Pharmaceutics 2023; 15:2419. [PMID: 37896180 PMCID: PMC10610393 DOI: 10.3390/pharmaceutics15102419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/31/2023] [Accepted: 09/06/2023] [Indexed: 10/29/2023] Open
Abstract
Diabetic retinopathy (DR) is a microvascular complication associated with vascular endothelial growth factor (VEGF) overexpression. Therapeutic delivery to the retina is a challenging phenomenon due to ocular biological barriers. Sorafenib tosylate (ST) is a lipophilic drug with low molecular weight, making it ineffective at bypassing the blood-retinal barrier (BRB) to reach the target site. Cubosomes are potential nanocarriers for encapsulating and releasing such drugs in a sustained manner. The present research aimed to compare the effects of sorafenib-tosylate-loaded cubosome nanocarriers (ST-CUBs) and a sorafenib tosylate suspension (ST-Suspension) via subconjunctival route in an experimental DR model. In this research, ST-CUBs were prepared using the melt dispersion emulsification technique. The distribution of prepared nanoparticles into the posterior eye segments was studied with confocal microscopy. The ST-CUBs were introduced into rats' left eye via subconjunctival injection (SCJ) and compared with ST-Suspension to estimate the single-dose pharmacokinetic profile. Streptozotocin (STZ)-induced diabetic albino rats were treated with ST-CUBs and ST-Suspension through the SCJ route once a week for 28 days to measure the inhibitory effect of ST on the diabetic retina using histopathology and immunohistochemistry (IHC) examinations. Confocal microscopy and pharmacokinetic studies showed an improved concentration of ST from ST-CUBs in the retina. In the DR model, ST-CUB treatment using the SCJ route exhibited decreased expression levels of VEGF, pro-inflammatory cytokines, and adhesion molecules compared to ST-Suspension. From the noted research findings, it was concluded that the CUBs potentially enhanced the ST bioavailability. The study outcomes established that the developed nanocarriers were ideal for delivering the ST-CUBs via the SCJ route to target the retina for facilitated DR management.
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Affiliation(s)
- Sharadha Madhusudhan
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India;
| | - Naresh Vishal Gupta
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India;
| | - Mohamed Rahamathulla
- Department of Pharmaceutics, College of Pharmacy, King Khalid University, Abha 62529, Saudi Arabia; (M.R.); (M.G.)
| | - Saravana Babu Chidambaram
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; (S.B.C.); (A.H.T.)
- Centre for Experimental Pharmacology & Research, Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Riyaz Ali M. Osmani
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India;
| | - Mohammed Ghazwani
- Department of Pharmaceutics, College of Pharmacy, King Khalid University, Abha 62529, Saudi Arabia; (M.R.); (M.G.)
- Cancer Research Unit, King Khalid University, Abha 62529, Saudi Arabia
| | - Mohammed Muqtader Ahmed
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdul Aziz University, Al Kharj 11942, Saudi Arabia;
| | - Syeda Ayesha Farhana
- Department of Pharmaceutics, Unaizah College of Pharmacy, Qassim University, Unaizah 51911, Saudi Arabia;
| | - Mohammed Y. Sarhan
- Department of Special Surgery, The Hashemite University, Zarqa 13133, Jordan;
| | - Ahmed Hediyal Tousif
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; (S.B.C.); (A.H.T.)
- Centre for Experimental Pharmacology & Research, Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
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3
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Rondanelli M, Gasparri C, Riva A, Petrangolini G, Barrile GC, Cavioni A, Razza C, Tartara A, Perna S. Diet and ideal food pyramid to prevent or support the treatment of diabetic retinopathy, age-related macular degeneration, and cataracts. Front Med (Lausanne) 2023; 10:1168560. [PMID: 37324128 PMCID: PMC10265999 DOI: 10.3389/fmed.2023.1168560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 05/09/2023] [Indexed: 06/17/2023] Open
Abstract
Many eye diseases, such as diabetic retinopathy (DR), age-related macular degeneration (AMD), and cataracts are preventable and treatable with lifestyle. The objective of this review is to assess the most recent research on the ideal dietary approach to prevent or support the treatment of DR, AMD, and cataracts, as well as to construct a food pyramid that makes it simple for people who are at risk of developing these pathologies to decide what to eat. The food pyramid presented here proposes what should be consumed every day: 3 portions of low glycemic index (GI) grains (for fiber and zinc content), 5 portions (each portion: ≥200 g/day) of fruits and vegetables (spinach, broccoli, zucchini cooked, green leafy vegetables, orange, kiwi, grapefruit for folic acid, vitamin C, and lutein/zeaxanthin content, at least ≥42 μg/day, are to be preferred), extra virgin olive (EVO) oil (almost 20 mg/day for vitamin E and polyphenols content), nuts or oil seeds (20-30 g/day, for zinc content, at least ≥15.8 mg/day); weekly: fish (4 portions, for omega-3 content and eicosapentaenoic acid (EPA) + docosahexaenoic acid (DHA) 0.35-1.4 g/day), white meat (3 portions for vitamin B12 content), legumes (2 portions for vegetal proteins), eggs (2 portions for lutein/zeaxanthin content), light cheeses (2 portions for vitamin B6 content), and almost 3-4 times/week microgreen and spices (saffron and curcumin). At the top of the pyramid, there are two pennants: one green, which indicates the need for personalized supplementation (if daily requirements cannot be met through diet, omega-3, and L-methylfolate supplementation), and one red, which indicates that certain foods are prohibited (salt and sugar). Finally, 3-4 times per week, 30-40 min of aerobic and resistance exercises are required.
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Affiliation(s)
- Mariangela Rondanelli
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Mondino Foundation, Pavia, Italy
- Unit of Human and Clinical Nutrition, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy
| | - Clara Gasparri
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona “Istituto Santa Margherita”, University of Pavia, Pavia, Italy
| | | | | | - Gaetan Claude Barrile
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona “Istituto Santa Margherita”, University of Pavia, Pavia, Italy
| | - Alessandro Cavioni
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona “Istituto Santa Margherita”, University of Pavia, Pavia, Italy
| | - Claudia Razza
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona “Istituto Santa Margherita”, University of Pavia, Pavia, Italy
| | - Alice Tartara
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona “Istituto Santa Margherita”, University of Pavia, Pavia, Italy
| | - Simone Perna
- Department of Biology, College of Science, University of Bahrain, Zallaq, Bahrain
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Lyu Z, Chen Y, Zhu Z, Luo X, Cui Y, Xie J, Chen Z, Liu J, Wu X, Bulloch G, Meng Q. Associations of concomitant retinopathy and depression with mortality in a nationally representative population. J Affect Disord 2023; 336:15-24. [PMID: 37211053 DOI: 10.1016/j.jad.2023.05.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 05/11/2023] [Accepted: 05/12/2023] [Indexed: 05/23/2023]
Abstract
OBJECTIVE To evaluate the interaction effects between retinopathy and depression on mortality risks in genral population and subpopulation with diabetes. METHODS Prospective analyses were conducted on data from the National Health and Nutrition Examination Surveys study. Associations of retinopathy, depression and their interaction with all-cause, cardiovascular disease (CVD)-specific, cancer-specific and other-specific mortality risk were estimated using Kaplan-Meier curves and multivariate Cox proportional hazards models. RESULTS Among 5367 participants, the weighted prevalence of retinopathy and depression was 9.6 % and 7.1 %, respectively. After a follow-up period of 12.1 years, 1295 deaths (17.3 %) occurred. Retinopathy was associated with an increased risk of all-cause (hazard ratio [HR]; 95 % confidence interval [CI]) (1.47; 1.27-1.71), CVD-specific (1.87; 1.45-2.41), and other-specific (1.43; 1.14-1.79) mortality. Similar relationship was observed between depression and all-cause mortality (1.24; 1.02-1.52). Retinopathy and depression had a positive multiplicative and additive interaction effect on all-cause (Pinteraction = 0.015; relative excess risk of interaction [RERI] 1.30; 95 % CI 0.15-2.45) and CVD-specific mortality (Pinteraction = 0.042; RERI 2.65; 95 % CI -0.12-5.42). Concomitant retinopathy and depression was more markedly associated with all-cause (2.86; 1.91-4.28), CVD-specific (4.70; 2.57-8.62), and other-specific mortality risks (2.18; 1.14-4.15) compared to those without retinopathy and depression. These associations were more pronounced in the diabetic participants. CONCLUSIONS The co-occurrence of retinopathy and depression increases the risk of all-cause and CVD-specific mortality among middle-aged and older adults in the United States, especially in population with diabetes. Focus on diabetic patients and active evaluation and intervention of retinopathy with depression may improve their quality of life and mortality outcomes.
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Affiliation(s)
- Zheng Lyu
- School of Medicine, South China University of Technology, Guangzhou, Guangdong, China; Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Yilin Chen
- School of Medicine, South China University of Technology, Guangzhou, Guangdong, China; Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
| | - Zhuoting Zhu
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China; Ophthalmology, Centre for Eye Research Australia, University of Melbourne, Melbourne, Australia
| | - Xiaoyang Luo
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Ying Cui
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Jie Xie
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Zhifan Chen
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Junbin Liu
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Xiyu Wu
- School of Medicine, South China University of Technology, Guangzhou, Guangdong, China; Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Gabrella Bulloch
- Ophthalmology, Centre for Eye Research Australia, University of Melbourne, Melbourne, Australia
| | - Qianli Meng
- School of Medicine, South China University of Technology, Guangzhou, Guangdong, China; Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China.
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Keshet A, Shilo S, Godneva A, Talmor-Barkan Y, Aviv Y, Segal E, Rossman H. CGMap: Characterizing continuous glucose monitor data in thousands of non-diabetic individuals. Cell Metab 2023; 35:758-769.e3. [PMID: 37080199 DOI: 10.1016/j.cmet.2023.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 01/27/2023] [Accepted: 04/04/2023] [Indexed: 04/22/2023]
Abstract
Despite its rising prevalence, diabetes diagnosis still relies on measures from blood tests. Technological advances in continuous glucose monitoring (CGM) devices introduce a potential tool to expand our understanding of glucose control and variability in people with and without diabetes. Yet CGM data have not been characterized in large-scale healthy cohorts, creating a lack of reference for CGM data research. Here we present CGMap, a characterization of CGM data collected from over 7,000 non-diabetic individuals, aged 40-70 years, between 2019 and 2022. We provide reference values of key CGM-derived clinical measures that can serve as a tool for future CGM research. We further explored the relationship between CGM-derived measures and diabetes-related clinical parameters, uncovering several significant relationships, including associations of mean blood glucose with measures from fundus imaging and sleep monitoring. These findings offer novel research directions for understanding the influence of glucose levels on various aspects of human health.
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Affiliation(s)
- Ayya Keshet
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel; Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Smadar Shilo
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel; Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel; The Jesse and Sara Lea Shafer Institute of Endocrinology and Diabetes, National Center for Childhood Diabetes, Schneider Children's Medical Center of Israel, Petah Tikva, Israel
| | - Anastasia Godneva
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel; Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Yeela Talmor-Barkan
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel; Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel; Department of Cardiology, Rabin Medical Center, Petah-Tikva, Israel
| | - Yaron Aviv
- Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel; Department of Cardiology, Rabin Medical Center, Petah-Tikva, Israel
| | - Eran Segal
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel; Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel.
| | - Hagai Rossman
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel; Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel; Pheno.AI, Tel-Aviv, Israel.
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6
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SENP6-Mediated deSUMOylation of VEGFR2 Enhances Its Cell Membrane Transport in Angiogenesis. Int J Mol Sci 2023; 24:ijms24032544. [PMID: 36768878 PMCID: PMC9916989 DOI: 10.3390/ijms24032544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/10/2023] [Accepted: 01/17/2023] [Indexed: 01/31/2023] Open
Abstract
Angiogenesis is a significant pathogenic characteristic of diabetic microangiopathy. Advanced glycation end products (AGEs) are considerably elevated in diabetic tissues and can affect vascular endothelial cell shape and function. Regulation of the vascular endothelial growth factor (VEGF)-VEGF receptor 2 (VEGFR2) signaling pathway is a critical mechanism in the regulation of angiogenesis, and VEGFR2 activity can be modified by post-translational changes. However, little research has been conducted on the control of small ubiquitin-related modifier (SUMO)-mediated VEGFR2 alterations. The current study investigated this using human umbilical vein endothelial cells (HUVECs) in conjunction with immunoblotting and immunofluorescence. AGEs increased Nrf2 translocation to the nucleus and promoted VEGFR2 expression. They also increased the expression of sentrin/SUMO-specific protease 6 (SENP6), which de-SUMOylated VEGFR2, and immunofluorescence indicated a reduction in VEGFR2 accumulation in the Golgi and increased VEGFR2 transport from the Golgi to the cell membrane surface via the coatomer protein complex subunit beta 2. VEGFR2 on the cell membrane was linked to VEGF generated by pericytes, triggering the VEGF signaling cascade. In conclusion, this study demonstrates that SENP6 regulates VEGFR2 trafficking from the Golgi to the endothelial cell surface. The SENP6-VEGFR2 pathway plays a critical role in pathological angiogenesis.
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7
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Smith JM, Mandava N, Tirado-Gonzalez V, Garcia-Santisteban R, Geiger MD, Patnaik JL, Frazer-Abel A, Lynch AM, Mandava N, Holers VM, Wagner BD, Sanchez-Santos I, Meizner D, Quiroz-Mercado H, Palestine AG. Correlation of Complement Activation in Aqueous and Vitreous in Patients With Proliferative Diabetic Retinopathy. Transl Vis Sci Technol 2022; 11:13. [PMID: 35420644 PMCID: PMC9034714 DOI: 10.1167/tvst.11.4.13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose A growing body of evidence suggests complement dysregulation is present in the vitreous of patients with diabetic eye disease. Further translational study could be simplified if aqueous-as opposed to vitreous-were used to sample the intraocular complement environment. Here, we analyze aqueous samples and assess whether a correlation exists between aqueous and vitreous complement levels. Methods We collected aqueous, vitreous, and plasma samples from patients with and without proliferative diabetic retinopathy (PDR) undergoing vitrectomy. We assessed correlation between complement levels in aqueous and vitreous samples after using a normalizing ratio to correct for vascular leakage. Spearman correlation coefficients were used to assess the correlation between complement levels in the aqueous and vitreous. Results Aqueous samples were obtained from 17 cases with PDR and 28 controls. In all patients, aqueous Ba, C3a, and albumin levels were strongly correlated with vitreous levels (Spearman correlation coefficient of 0.8 for Ba and C3a and 0.7 for albumin; all P values < 0.0001). In PDR eyes only, aqueous and vitreous C3a levels were significantly correlated (Spearman correlation coefficient 0.7; P = 0.002), whereas in control eyes, both Ba and C3a (Spearman correlation coefficients of 0.7; P < 0.0001) were significantly correlated. Conclusions A strong correlation exists between aqueous and vitreous complement levels in diabetic eye disease. Translational Relevance The results establish that accurate sampling of the intraocular complement can be done by analyzing aqueous specimens, allowing for the rapid and safe measurement of experimental complement targets and treatment response.
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Affiliation(s)
- Jesse M Smith
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Nikhil Mandava
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO, USA
| | | | | | - Matthew D Geiger
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Jennifer L Patnaik
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Ashley Frazer-Abel
- Exsersa BioLabs, University of Colorado School of Medicine, Aurora, CO, USA
| | - Anne M Lynch
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Naresh Mandava
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO, USA
| | - V Michael Holers
- Departments of Immunology and Medicine, University of Colorado School of Medicine, Aurora, CO, USA
| | - Brandie D Wagner
- Department of Biostatistics and Informatics, University of Colorado School of Public Health, Aurora, CO, USA
| | | | | | | | - Alan G Palestine
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO, USA
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Inhibition of Aldose Reductase by Novel Phytocompounds: A Heuristic Approach to Treating Diabetic Retinopathy. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:9624118. [PMID: 35356240 PMCID: PMC8959960 DOI: 10.1155/2022/9624118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 03/03/2022] [Indexed: 01/05/2023]
Abstract
Aldose reductase (ALR2) activation in the polyol pathway has been implicated as the primary mechanism for the progression of diabetic retinopathy. Most of the aldose reductase inhibitors (ARIs), used for the treatment of diabetic complications, were withdrawn due to ineffective treatment and adverse side effects caused by nonspecificity. Epalrestat, a carboxylic acid inhibitor, is the only ARI used for the treatment of diabetic neuropathy, though associated with minor side effects to 8% of the treated population. Our study exploited the interactions of Epalrestat-ALR2 crystal structure for the identification of specific phytocompounds that could inhibit human lens ALR2. 3D structures of plant compounds possessing antidiabetic property were retrieved from PubChem database for inhibition analysis, against human lens ALR2. Among the shortlisted compounds, Agnuside and Eupalitin-3-O-galactoside inhibited lens ALR2 with IC50 values of 22.4 nM and 27.3 nM, respectively, compared to the drug Epalrestat (98 nM), indicating high potency of these compounds as ALR2 inhibitors. IC50 concentration of the identified ARIs was validated in vitro using ARPE-19 cells. The in silico and in vitro approaches employed to identify and validate specific and potent ALR2 inhibitors resulted in the identification of phytocompounds with potency equal to or better than the ALR2 inhibiting drug, Epalrestat.
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9
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Wali S, Atia-Tul-Wahab, Ullah S, Khan MA, Hussain S, Shaikh M, Atta-Ur-Rahman, Choudhary MI. Synthesis of new clioquinol derivatives as potent α-glucosidase inhibitors; molecular docking, kinetic and structure-activity relationship studies. Bioorg Chem 2021; 119:105506. [PMID: 34896920 DOI: 10.1016/j.bioorg.2021.105506] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 11/11/2021] [Accepted: 11/17/2021] [Indexed: 12/14/2022]
Abstract
Diabetes mellitus is a chronic metabolic disorder with increasing prevalence and long-term complications. The aim of this study was to identify α-glucosidase inhibitory compounds with potential anti-hyperglycemic activity. For this purpose, a series of new clioquinol derivatives 2a-11a was synthesized, and characterized by various spectroscopic techniques. The enzyme inhibitory activities of the resulting derivatives were assessed using an in-vitro mechanism-based assay. All the tested compounds 2a-11a of the series showed a significant α-glucosidase inhibition with IC50 values 43.86-325.81 µM, as compared to the standard drug acarbose 1C50: 875.75 ± 2.08 µM. Among them, compounds 4a, 5a, 10a, and 11a showed IC50 values of 105.51 ± 2.41, 119.24 ± 2.37, 99.15 ± 2.06, and 43.86 ± 2.71 µM, respectively. Kinetic study of the active analogues showed competitive, non-competitive, and mixed-type inhibitions. Furthermore, the molecular docking study was performed to elucidate the binding interactions of most active analogues with the various sites of α-glucosidase enzyme. The results indicate that these compounds have the potential to be further studied as new anti-diabetic agents.
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Affiliation(s)
- Shoukat Wali
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Atia-Tul-Wahab
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
| | - Saeed Ullah
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Maria Aqeel Khan
- Third World Center for Science and Technology International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Shahid Hussain
- Toronto General Hospital Research Institute (TGHRI), Toronto M5G 2C4, Canada
| | - Muniza Shaikh
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Atta-Ur-Rahman
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - M Iqbal Choudhary
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; Department of Biochemistry, Faculty of Science King Abdulaziz University, Jeddah 22254, Saudi Arabia.
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10
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Kim D, Choi SW, Cho J, Been JH, Choi K, Jiang W, Han J, Oh J, Park C, Choi S, Seo S, Kim KL, Suh W, Lee SK, Kim S. Discovery of Novel Small-Molecule Antiangiogenesis Agents to Treat Diabetic Retinopathy. J Med Chem 2021; 64:5535-5550. [PMID: 33902285 DOI: 10.1021/acs.jmedchem.0c01965] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Diabetic retinopathy is the leading cause of blindness which is associated with excessive angiogenesis. Using the structure of wondonin marine natural products, we previously created a scaffold to develop a novel type of antiangiogenesis agent that possesses minimized cytotoxicity. To overcome its poor pharmaceutical properties, we further modified the structure. A new scaffold was derived in which the stereogenic carbon was changed to nitrogen and the 1,2,3-triazole ring was replaced by an alkyl chain. By comparing the bioactivity versus cytotoxicity, compound 31 was selected, which has improved aqueous solubility and an enhanced selectivity index. Mechanistically, 31 suppressed angiopoietin-2 (ANGPT2) expression induced by high glucose in retinal cells and exhibited in vivo antiangiogenic activity in choroidal neovascularization and oxygen-induced retinopathy mouse models. These results suggest the potential of 31 as a lead to develop antiangiogenic small-molecule drugs to treat diabetic retinopathy and as a chemical tool to elucidate new mechanisms of angiogenesis.
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Affiliation(s)
- Donghwa Kim
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Sang Won Choi
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Jihee Cho
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Jae-Hui Been
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Kyoungsun Choi
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Wenzhe Jiang
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Jaeho Han
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Jedo Oh
- Hana Pharmaceutical Co., Pangyo 13486, Korea
| | | | | | - Songyi Seo
- Department of Global Innovative Drug, Graduate School of Chung-Ang University, College of Pharmacy, Chung-Ang University, Seoul 06974, Korea
| | - Koung Li Kim
- Department of Global Innovative Drug, Graduate School of Chung-Ang University, College of Pharmacy, Chung-Ang University, Seoul 06974, Korea
| | - Wonhee Suh
- Department of Global Innovative Drug, Graduate School of Chung-Ang University, College of Pharmacy, Chung-Ang University, Seoul 06974, Korea
| | - Sang Kook Lee
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Sanghee Kim
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
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11
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Pereira-Figueiredo D, Nascimento AA, Cunha-Rodrigues MC, Brito R, Calaza KC. Caffeine and Its Neuroprotective Role in Ischemic Events: A Mechanism Dependent on Adenosine Receptors. Cell Mol Neurobiol 2021; 42:1693-1725. [PMID: 33730305 DOI: 10.1007/s10571-021-01077-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 03/05/2021] [Indexed: 02/07/2023]
Abstract
Ischemia is characterized by a transient, insufficient, or permanent interruption of blood flow to a tissue, which leads to an inadequate glucose and oxygen supply. The nervous tissue is highly active, and it closely depends on glucose and oxygen to satisfy its metabolic demand. Therefore, ischemic conditions promote cell death and lead to a secondary wave of cell damage that progressively spreads to the neighborhood areas, called penumbra. Brain ischemia is one of the main causes of deaths and summed with retinal ischemia comprises one of the principal reasons of disability. Although several studies have been performed to investigate the mechanisms of damage to find protective/preventive interventions, an effective treatment does not exist yet. Adenosine is a well-described neuromodulator in the central nervous system (CNS), and acts through four subtypes of G-protein-coupled receptors. Adenosine receptors, especially A1 and A2A receptors, are the main targets of caffeine in daily consumption doses. Accordingly, caffeine has been greatly studied in the context of CNS pathologies. In fact, adenosine system, as well as caffeine, is involved in neuroprotection effects in different pathological situations. Therefore, the present review focuses on the role of adenosine/caffeine in CNS, brain and retina, ischemic events.
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Affiliation(s)
- D Pereira-Figueiredo
- Neurobiology of the Retina Laboratory, Biomedical Sciences Program, Biomedical Institute, Fluminense Federal University, Niterói, RJ, Brazil
| | - A A Nascimento
- Neurobiology of the Retina Laboratory, Program of Neurosciences, Institute of Biology, Fluminense Federal University, Niterói, RJ, Brazil
| | - M C Cunha-Rodrigues
- Neurobiology of the Retina Laboratory, Program of Neurosciences, Institute of Biology, Fluminense Federal University, Niterói, RJ, Brazil
| | - R Brito
- Laboratory of Neuronal Physiology and Pathology, Cellular and Molecular Biology Department, Institute of Biology, Fluminense Federal University, Niterói, RJ, Brazil
| | - K C Calaza
- Neurobiology of the Retina Laboratory, Biomedical Sciences Program, Biomedical Institute, Fluminense Federal University, Niterói, RJ, Brazil. .,Neurobiology of the Retina Laboratory, Program of Neurosciences, Institute of Biology, Fluminense Federal University, Niterói, RJ, Brazil. .,Neurobiology Department, Biology Institute of Fluminense Federal University, Niteroi, RJ, Brazil.
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Mandava N, Tirado-Gonzalez V, Geiger MD, Patnaik JL, Frazer-Abel A, Lynch AM, Mandava N, Palestine AG, Holers VM, Wagner BD, Sanchez-Santos I, Meizner D, Quiroz-Mercado H, Smith JM. Complement Activation in the Vitreous of Patients With Proliferative Diabetic Retinopathy. Invest Ophthalmol Vis Sci 2020; 61:39. [PMID: 32965482 PMCID: PMC7520707 DOI: 10.1167/iovs.61.11.39] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 08/17/2020] [Indexed: 11/29/2022] Open
Abstract
Purpose A growing body of evidence points to complement dysregulation in diabetes. Early studies have indicated the presence of complement components inside the eye in patients with diabetic retinopathy, but these data have been confounded by leakage of proteins from the systemic circulation into the vitreous cavity. Methods We took samples of plasma and vitreous from patients with and without proliferative diabetic retinopathy (PDR) and measured levels of 16 complement components as well as albumin. We employed a normalized ratio using local and systemic complement and albumin levels to control for vascular leakage into the vitreous cavity. Results Before normalizing, we found significantly higher levels of 16 complement components we measured in PDR eyes compared to controls. After normalizing, levels of C4, factor B, and C5 were decreased compared to controls, while C3a and Ba levels were elevated compared to controls. We also found higher ratios of C3a/C3, C5a/C5, and Ba/factor B in PDR eyes compared to controls. Conclusions We found evidence of local, intraocular activation of C3, C5, and factor B. The normalized data suggest involvement of the alternative complement pathway. By showing activation of specific complement components in PDR, this study identifies targets for diagnostic and therapeutic potential.
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Affiliation(s)
- Nikhil Mandava
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, Colorado, United States
| | | | - Matthew D. Geiger
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, Colorado, United States
| | - Jennifer L. Patnaik
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, Colorado, United States
| | - Ashley Frazer-Abel
- Exsersa BioLabs, University of Colorado School of Medicine, Aurora, Colorado, United States
| | - Anne M. Lynch
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, Colorado, United States
| | - Naresh Mandava
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, Colorado, United States
| | - Alan G. Palestine
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, Colorado, United States
| | - V. Michael Holers
- Departments of Immunology and Medicine, University of Colorado School of Medicine, Aurora, Colorado, United States
| | - Brandie D. Wagner
- Department of Biostatistics and Informatics, University of Colorado School of Public Health, Aurora, Colorado, United States
| | | | | | | | - Jesse M. Smith
- Department of Ophthalmology, University of Colorado School of Medicine, Aurora, Colorado, United States
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Ma Y, Liu F, Xu Y. Protective Effect of β-Glucogallin on Damaged Cataract Against Methylglyoxal Induced Oxidative Stress in Cultured Lens Epithelial Cells. Med Sci Monit 2019; 25:9310-9318. [PMID: 31811113 PMCID: PMC6916131 DOI: 10.12659/msm.917869] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND ß-glucogallin (GG) is one of the major plant polyphenolic antioxidants that have been associated with positive effects on human health and are crucial in the developing defense mechanism against the risk of diseases. However, reports on the protective mechanism of GG in lens epithelial cells are limited. MATERIAL AND METHODS ARPE-19 cells (a human retinal epithelial cell line) were exposed to methylglyoxal (MG) with or without GG to illuminate the protective role of GG in counteracting the cataract signaling. RESULTS Cells predisposed to MG demonstrated an increase in oxidative stress with augmented (P<0.01) inflammatory cytokines such as cyclooxygenase (COX)-2, chemokine receptor CXCR4, interleukin (IL)-6, IL-8, monocyte chemoattractant protein-1 (MCP-1), and intercellular adhesion molecule 1 (ICAM-1) genes. In addition, the expression of aldose reductase (AR) was increased to 2-fold with accumulated sorbitol in MG exposed cells compared to control. On the other hand, cells exposed to MG evidenced a 3-fold increase in RAGE (receptor for advanced glycation end products) and a 2-fold increase in NF-kappaB (nuclear factor kappa-light-chain-enhancer of activated B cells) expression compared to control cells. Intriguingly, lens epithelial cells pre-treated with GG attenuated the reactive oxygen species levels with improved antioxidant enzymes. Simultaneously, the levels of AR and other inflammatory cytokines were observed in the levels closer to control cells in GG pre-treated cells. CONCLUSIONS Thus, the results of the present investigation show that GG may be a potential drug for the prevention of cataract development and progression.
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Affiliation(s)
- Ying Ma
- Department of Ophthalmology, The Second Hospital of Dalian Medical University, Dalian, Liaoning, China (mainland)
| | - Fei Liu
- Department of Ophthalmology, The Second Hospital of Dalian Medical University, Dalian, Liaoning, China (mainland)
| | - Yanli Xu
- Department of Ophthalmology, The Second Hospital of Dalian Medical University, Dalian, Liaoning, China (mainland)
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Lim RR, Vaidya T, Gadde SG, Yadav NK, Sethu S, Hainsworth DP, Mohan RR, Ghosh A, Chaurasia SS. Correlation between systemic S100A8 and S100A9 levels and severity of diabetic retinopathy in patients with type 2 diabetes mellitus. Diabetes Metab Syndr 2019; 13:1581-1589. [PMID: 31336525 DOI: 10.1016/j.dsx.2019.03.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 03/05/2019] [Indexed: 02/06/2023]
Abstract
AIMS S100A8 and S100A9 are myeloid-related damage-associated molecular patterns (DAMPs) primarily involved in the modulation of innate immune response to cellular injury. This study evaluated the correlation between circulating concentrations of S100A8 and S100A9 proteins with the severity of diabetic retinopathy (DR) in patients with type 2 diabetes (T2DM). METHODS T2DM patients with HbA1c levels >7%, fasting blood glucose >126 mg/dl and history of diabetes were included in this study. DR severity was graded based on ETDRS and Gloucestershire classifications. Plasma samples were evaluated for S100A8 and S100A9 levels using ELISA. RESULTS In this comparative study, DR patients (n = 89) had increased plasma S100A8 and S100A9 proteins compared to age-matched T2DM controls (n = 28), which was directly related to the severity of DR. Female DR subjects had increased S100A8 expression compared to their male counterparts. Substantial retention of S100A8 and S100A9 production was seen in DR patients above 50 years of age. Duration of T2DM was not found to affect protein levels, however T2DM onset at >50 years old significantly increased S100A8 and S100A9 concentrations. CONCLUSIONS Our findings suggest that systemic circulation levels of S100A8 and S100A9 are correlated with the progression of DR in T2DM patients, indicating their potential role in DR pathogenesis.
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Affiliation(s)
- Rayne R Lim
- Ocular Immunology and Angiogenesis Lab, Department of Veterinary Medicine & Surgery, University of Missouri, Columbia, MO, 65211, USA; Department of Biomedical Sciences, University of Missouri, Columbia, MO, 65211, USA; Harry S. Truman Memorial Veteran Hospital, Columbia, MO, 65201, USA
| | - Tanuja Vaidya
- GROW Research Laboratory, Narayana Nethralaya, Bangalore, 560099, India
| | - Santosh G Gadde
- Vitreoretina Department, Narayana Nethralaya, Bangalore, 560099, India
| | - Naresh K Yadav
- Vitreoretina Department, Narayana Nethralaya, Bangalore, 560099, India
| | - Swaminathan Sethu
- GROW Research Laboratory, Narayana Nethralaya, Bangalore, 560099, India
| | - Dean P Hainsworth
- Vitreoretinal Service, Ophthalmology, Mason Eye Institute, University of Missouri, Columbia, MO, 65211, USA
| | - Rajiv R Mohan
- Ocular Immunology and Angiogenesis Lab, Department of Veterinary Medicine & Surgery, University of Missouri, Columbia, MO, 65211, USA; Department of Biomedical Sciences, University of Missouri, Columbia, MO, 65211, USA; Harry S. Truman Memorial Veteran Hospital, Columbia, MO, 65201, USA
| | - Arkasubhra Ghosh
- GROW Research Laboratory, Narayana Nethralaya, Bangalore, 560099, India.
| | - Shyam S Chaurasia
- Ocular Immunology and Angiogenesis Lab, Department of Veterinary Medicine & Surgery, University of Missouri, Columbia, MO, 65211, USA; Department of Biomedical Sciences, University of Missouri, Columbia, MO, 65211, USA; Harry S. Truman Memorial Veteran Hospital, Columbia, MO, 65201, USA.
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Kasturi SP, Surarapu S, Uppalanchi S, Dwivedi S, Yogeeswari P, Sigalapalli DK, Bathini NB, Ethiraj KS, Anireddy JS. Synthesis, molecular modeling and evaluation of α-glucosidase inhibition activity of 3,4-dihydroxy piperidines. Eur J Med Chem 2018. [DOI: 10.1016/j.ejmech.2018.02.072] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Reddy S, Amutha A, Rajalakshmi R, Bhaskaran R, Monickaraj F, Rangasamy S, Anjana RM, Abhijit S, Gokulakrishnan K, Das A, Mohan V, Balasubramanyam M. Association of increased levels of MCP-1 and cathepsin-D in young onset type 2 diabetes patients (T2DM-Y) with severity of diabetic retinopathy. J Diabetes Complications 2017; 31:804-809. [PMID: 28336215 DOI: 10.1016/j.jdiacomp.2017.02.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Revised: 01/25/2017] [Accepted: 02/13/2017] [Indexed: 02/08/2023]
Abstract
AIM Young onset type 2 diabetes patients (T2DM-Y) have been shown to possess an increased risk of developing microvascular complications particularly diabetic retinopathy. However, the molecular mechanisms are not clearly understood. In this study, we investigated the serum levels of monocyte chemotactic protein 1 (MCP-1) and cathepsin-D in patients with T2DM-Y without and with diabetic retinopathy. METHODS In this case-control study, participants comprised individuals with normal glucose tolerance (NGT=40), patients with type 2 diabetes mellitus (T2DM=35), non-proliferative diabetic retinopathy (NPDR=35) and proliferative diabetic retinopathy (PDR=35). Clinical characterization of the study subjects was done by standard procedures and MCP-1 and cathepsin-D were measured by ELISA. RESULTS Compared to control individuals, patients with T2DM-Y, NPDR and PDR exhibited significantly (p<0.001) higher levels of MCP-1. Cathepsin-D levels were also significantly (p<0.001) higher in patients with T2DM-Y without and with diabetic retinopathy. Correlation analysis revealed a positive association (p<0.001) between MCP-1 and cathepsin-D levels. There was also a significant negative correlation of MCP1/cathepsin-D with C-peptide levels. The association of increased levels of MCP-1/cathepsin-D in patients with DR persisted even after adjusting for all the confounding factors. CONCLUSION As both MCP-1 and cathepsin-D are molecular signatures of cellular senescence, we suggest that these biomarkers might be useful to predict the development of retinopathy in T2DM-Y patients.
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Affiliation(s)
- Sruthi Reddy
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialities Centre, Gopalapuram, Chennai 600086, India
| | - Anandakumar Amutha
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialities Centre, Gopalapuram, Chennai 600086, India
| | - Ramachandran Rajalakshmi
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialities Centre, Gopalapuram, Chennai 600086, India
| | - Regin Bhaskaran
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialities Centre, Gopalapuram, Chennai 600086, India
| | - Finny Monickaraj
- Department of Surgery and Department of Cell Biology and Physiology, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Sampathkumar Rangasamy
- Neurogenomics Division, Translational Genomics Research Institute, (TGen), Phoenix, AZ, USA
| | - Ranjit Mohan Anjana
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialities Centre, Gopalapuram, Chennai 600086, India
| | - Shiny Abhijit
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialities Centre, Gopalapuram, Chennai 600086, India
| | - Kuppan Gokulakrishnan
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialities Centre, Gopalapuram, Chennai 600086, India
| | - Arup Das
- Department of Surgery and Department of Cell Biology and Physiology, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Viswanathan Mohan
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialities Centre, Gopalapuram, Chennai 600086, India
| | - Muthuswamy Balasubramanyam
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialities Centre, Gopalapuram, Chennai 600086, India..
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NMR spectroscopy of human eye tissues: a new insight into ocular biochemistry. ScientificWorldJournal 2014; 2014:546192. [PMID: 25525621 PMCID: PMC4265547 DOI: 10.1155/2014/546192] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 09/27/2014] [Accepted: 10/19/2014] [Indexed: 02/04/2023] Open
Abstract
Background. The human eye is a complex organ whose anatomy and functions has been described very well to date. Unfortunately, the knowledge of the biochemistry and metabolic properties of eye tissues varies. Our objective was to reveal the biochemical differences between main tissue components of human eyes. Methods. Corneas, irises, ciliary bodies, lenses, and retinas were obtained from cadaver globes 0-1/2 hours postmortem of 6 male donors (age: 44–61 years). The metabolic profile of tissues was investigated with HR MAS 1H NMR spectroscopy. Results. A total of 29 metabolites were assigned in the NMR spectra of the eye tissues. Significant differences between tissues were revealed in contents of the most distant eye-tissues, while irises and ciliary bodies showed minimal biochemical differences. ATP, acetate, choline, glutamate, lactate, myoinositol, and taurine were identified as the primary biochemical compounds responsible for differentiation of the eye tissues. Conclusions. In this study we showed for the first time the results of the analysis of the main human eye tissues with NMR spectroscopy. The biochemical contents of the selected tissues seemed to correspond to their primary anatomical and functional attributes, the way of the delivery of the nutrients, and the location of the tissues in the eye.
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Bolster NM, Giardini ME, Livingstone IAT, Bastawrous A. How the smartphone is driving the eye-health imaging revolution. EXPERT REVIEW OF OPHTHALMOLOGY 2014. [DOI: 10.1586/17469899.2014.981532] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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19
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Chang KC, Snow A, LaBarbera DV, Petrash JM. Aldose reductase inhibition alleviates hyperglycemic effects on human retinal pigment epithelial cells. Chem Biol Interact 2014; 234:254-60. [PMID: 25451566 DOI: 10.1016/j.cbi.2014.10.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 10/02/2014] [Accepted: 10/08/2014] [Indexed: 12/11/2022]
Abstract
Chronic hyperglycemia is an important risk factor involved in the onset and progression of diabetic retinopathy (DR). Among other effectors, aldose reductase (AR) has been linked to the pathogenesis of this degenerative disease. The purpose of this study was to investigate whether the novel AR inhibitor, beta-glucogallin (BGG), can offer protection against various hyperglycemia-induced abnormalities in human adult retinal pigment epithelial (ARPE-19) cells. AR is an enzyme that contributes to cellular stress by production of reactive oxygen species (ROS) under high glucose conditions. A marked decrease in cell viability (from 100% to 78%) following long-term exposure (4 days) of RPE cells to high glucose (HG) was largely prevented by siRNA-mediated knockdown of AR gene expression (from 79% to 97%) or inhibition using sorbinil (from 66% to 86%). In HG, BGG decreased sorbitol accumulation (44%), ROS production (27%) as well as ER stress (22%). Additionally, we demonstrated that BGG prevented loss of mitochondrial membrane potential (MMP) under HG exposure. We also showed that AR inhibitor pretreatment reduced retinal microglia-induced apoptosis in APRE-19 cells. These results suggest that BGG may be useful as a therapeutic agent against retinal degeneration in the diabetic eye by preventing RPE cell death.
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Affiliation(s)
- Kun-Che Chang
- Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA; Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Anson Snow
- Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Daniel V LaBarbera
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - J Mark Petrash
- Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA; Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA.
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20
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Garin N, Olaya B, Lara E, Moneta MV, Miret M, Ayuso-Mateos JL, Haro JM. Visual impairment and multimorbidity in a representative sample of the Spanish population. BMC Public Health 2014; 14:815. [PMID: 25103270 PMCID: PMC4139603 DOI: 10.1186/1471-2458-14-815] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 06/26/2014] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND In the context of population aging, visual impairment has emerged as a growing concern in public health. However, there is a need for further research into the relationship between visual impairment and chronic medical conditions in the elderly. The aim of our study was to examine the relationship between visual impairment and three main types of co-morbidity: chronic physical conditions (both at an independent and additive level), mental health and cognitive functioning. METHODS Data were collected from the COURAGE in Europe project, a cross-sectional study. A total of 4,583 participants from Spain were included. Diagnosis of chronic medical conditions included self-reported medical diagnosis and symptomatic algorithms. Depression and anxiety were assessed using CIDI algorithms. Visual assessment included objective distance/near visual acuity and subjective visual performance. Descriptive analyses included the whole sample (n = 4,583). Statistical analyses included participants aged over 50 years (n = 3,625; mean age = 66.45 years) since they have a significant prevalence of chronic conditions and visual impairment. Crude and adjusted binary logistic regressions were performed to identify independent associations between visual impairment and chronic medical conditions, physical multimorbidity and mental conditions. Covariates included age, gender, marital status, education level, employment status and urbanicity. RESULTS The number of chronic physical conditions was found to be associated with poorer results in both distance and near visual acuity [OR 1.75 (CI 1.38-2.23); OR 1.69 (CI 1.27-2.24)]. At an independent level, arthritis, stroke and diabetes were associated with poorer distance visual acuity results after adjusting for covariates [OR 1.79 (CI 1.46-2.21); OR 1.59 (CI 1.05-2.42); OR 1.27 (1.01-1.60)]. Only stroke was associated with near visual impairment [OR 3.01 (CI 1.86-4.87)]. With regard to mental health, poor subjective visual acuity was associated with depression [OR 1.61 (CI 1.14-2.27); OR 1.48 (CI 1.03-2.13)]. Both objective and subjective poor distance and near visual acuity were associated with worse cognitive functioning. CONCLUSIONS Arthritis, stroke and the co-occurrence of various chronic physical diseases are associated with higher prevalence of visual impairment. Visual impairment is associated with higher prevalence of depression and poorer cognitive function results. There is a need to implement patient-centered care involving special visual assessment in these cases.
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Affiliation(s)
- Noe Garin
- />Parc Sanitari Sant Joan de Déu, Universitat de Barcelona, Dr Antoni Pujades, 42, 08830 Barcelona, Sant Boi de Llobregat, Spain
- />Fundació Sant Joan de Déu, Santa Rosa, 39-57, 08950 Barcelona, Esplugues de Llobregat, Spain
- />Instituto de Salud Carlos III, Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Monforte de Lemos 3–5. Pabellón 11, 28029 Madrid, Spain
| | - Beatriz Olaya
- />Parc Sanitari Sant Joan de Déu, Universitat de Barcelona, Dr Antoni Pujades, 42, 08830 Barcelona, Sant Boi de Llobregat, Spain
- />Fundació Sant Joan de Déu, Santa Rosa, 39-57, 08950 Barcelona, Esplugues de Llobregat, Spain
- />Instituto de Salud Carlos III, Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Monforte de Lemos 3–5. Pabellón 11, 28029 Madrid, Spain
| | - Elvira Lara
- />Parc Sanitari Sant Joan de Déu, Universitat de Barcelona, Dr Antoni Pujades, 42, 08830 Barcelona, Sant Boi de Llobregat, Spain
- />Instituto de Salud Carlos III, Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Monforte de Lemos 3–5. Pabellón 11, 28029 Madrid, Spain
| | - Maria Victoria Moneta
- />Parc Sanitari Sant Joan de Déu, Universitat de Barcelona, Dr Antoni Pujades, 42, 08830 Barcelona, Sant Boi de Llobregat, Spain
| | - Marta Miret
- />Instituto de Salud Carlos III, Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Monforte de Lemos 3–5. Pabellón 11, 28029 Madrid, Spain
- />Department of Psychiatry, Universidad Autónoma de Madrid, Arzobispo Morcillo s/n, 28029 Madrid, Spain
| | - Jose Luis Ayuso-Mateos
- />Instituto de Salud Carlos III, Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Monforte de Lemos 3–5. Pabellón 11, 28029 Madrid, Spain
- />Department of Psychiatry, Universidad Autónoma de Madrid, Arzobispo Morcillo s/n, 28029 Madrid, Spain
- />Instituto de Investigación Sanitaria Princesa (IP), Diego de León, 62, 28006 Madrid, Spain
| | - Josep Maria Haro
- />Parc Sanitari Sant Joan de Déu, Universitat de Barcelona, Dr Antoni Pujades, 42, 08830 Barcelona, Sant Boi de Llobregat, Spain
- />Fundació Sant Joan de Déu, Santa Rosa, 39-57, 08950 Barcelona, Esplugues de Llobregat, Spain
- />Instituto de Salud Carlos III, Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Monforte de Lemos 3–5. Pabellón 11, 28029 Madrid, Spain
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Dorfman D, Aranda ML, González Fleitas MF, Chianelli MS, Fernandez DC, Sande PH, Rosenstein RE. Environmental enrichment protects the retina from early diabetic damage in adult rats. PLoS One 2014; 9:e101829. [PMID: 25004165 PMCID: PMC4086948 DOI: 10.1371/journal.pone.0101829] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 06/11/2014] [Indexed: 11/19/2022] Open
Abstract
Diabetic retinopathy is a leading cause of reduced visual acuity and acquired blindness. Available treatments are not completely effective. We analyzed the effect of environmental enrichment on retinal damage induced by experimental diabetes in adult Wistar rats. Diabetes was induced by an intraperitoneal injection of streptozotocin. Three days after vehicle or streptozotocin injection, animals were housed in enriched environment or remained in a standard environment. Retinal function (electroretinogram, and oscillatory potentials), retinal morphology, blood-retinal barrier integrity, synaptophysin, astrocyte and Müller cell glial fibrillary acidic protein, vascular endothelial growth factor, tumor necrosis factor-α, and brain-derived neurotrophic factor levels, as well as lipid peroxidation were assessed in retina from diabetic animals housed in standard or enriched environment. Environmental enrichment preserved scotopic electroretinogram a-wave, b-wave and oscillatory potential amplitude, avoided albumin-Evan's blue leakage, prevented the decrease in retinal synaptophysin and astrocyte glial fibrillary acidic protein levels, the increase in Müller cell glial fibrillary acidic protein, vascular endothelial growth factor and tumor necrosis factor-α levels, as well as oxidative stress induced by diabetes. In addition, enriched environment prevented the decrease in retinal brain-derived neurotrophic factor levels induced by experimental diabetes. When environmental enrichment started 7 weeks after diabetes onset, retinal function was significantly preserved. These results indicate that enriched environment could attenuate the early diabetic damage in the retina from adult rats.
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Affiliation(s)
- Damián Dorfman
- Laboratory of Retinal Neurochemistry and Experimental Ophthalmology, Department of Human Biochemistry, School of Medicine/CEFyBO, University of Buenos Aires/CONICET, Buenos Aires, Argentina
| | - Marcos L. Aranda
- Laboratory of Retinal Neurochemistry and Experimental Ophthalmology, Department of Human Biochemistry, School of Medicine/CEFyBO, University of Buenos Aires/CONICET, Buenos Aires, Argentina
| | - María Florencia González Fleitas
- Laboratory of Retinal Neurochemistry and Experimental Ophthalmology, Department of Human Biochemistry, School of Medicine/CEFyBO, University of Buenos Aires/CONICET, Buenos Aires, Argentina
| | - Mónica S. Chianelli
- Laboratory of Retinal Neurochemistry and Experimental Ophthalmology, Department of Human Biochemistry, School of Medicine/CEFyBO, University of Buenos Aires/CONICET, Buenos Aires, Argentina
| | - Diego C. Fernandez
- Laboratory of Retinal Neurochemistry and Experimental Ophthalmology, Department of Human Biochemistry, School of Medicine/CEFyBO, University of Buenos Aires/CONICET, Buenos Aires, Argentina
- Laboratory of Histology, School of Medicine, University of Morón, Buenos Aires, Argentina
| | - Pablo H. Sande
- Laboratory of Retinal Neurochemistry and Experimental Ophthalmology, Department of Human Biochemistry, School of Medicine/CEFyBO, University of Buenos Aires/CONICET, Buenos Aires, Argentina
| | - Ruth E. Rosenstein
- Laboratory of Retinal Neurochemistry and Experimental Ophthalmology, Department of Human Biochemistry, School of Medicine/CEFyBO, University of Buenos Aires/CONICET, Buenos Aires, Argentina
- * E-mail:
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Boretsky A, Gupta P, Tirgan N, Liu R, Godley BF, Zhang W, Tilton RG, Motamedi M. Nicotine accelerates diabetes-induced retinal changes. Curr Eye Res 2014; 40:368-77. [PMID: 24911405 DOI: 10.3109/02713683.2014.924147] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE To investigate the effects of nicotine on retinal alterations in early-stage diabetes in an established rodent model. MATERIALS AND METHODS Sprague-Dawley rats were examined using a combination of confocal scanning laser ophthalmoscopy and spectral domain optical coherence tomography to determine changes in retinal structure in response to nicotine exposure, diabetes and the combined effects of nicotine and diabetes. Diabetes was induced by a single injection of 65 mg/kg streptozotocin and nicotine injections were administered subcutaneously daily. Retinal thickness in the superior, inferior, nasal and temporal quadrants were determined based on the spectral domain optical coherence tomography (SD-OCT) volume scans (20° × 20°) centered on the optic disc. Segmentation of discrete retinal layers was performed on a subset of SD-OCT cross-sections to further examine changes in each treatment group. Survival of neurons within the ganglion cell layer (GCL) was assessed by confocal morphometric imaging. RESULTS The control group did not experience any significant change throughout the study. The nicotine treatment group experienced an average decrease in total retinal thickness (TRT) of 9.4 µm with the majority of the loss localized within the outer nuclear layer (ONL) as determined by segmentation analysis (p < 0.05). The diabetic group exhibited a trend toward decreased TRT while segmentation analysis of the diabetic retinopathy (DR) group revealed significant thinning within the ONL (p < 0.05). The combination of nicotine and diabetes revealed a significant increase of 8.9 µm in the TRT (p < 0.05) accompanied by a decrease in the number of GCL neurons. CONCLUSIONS We demonstrated significant temporal changes in retinal morphology in response to nicotine exposure, diabetes and with the combined effects of nicotine and diabetes. These findings may have implications in determining treatment strategies for diabetic patients using products containing nicotine, such as cigarettes, smokeless tobacco, electronic cigarettes or smoking cessation products.
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Sook Kim Y, Soo Lee I, Sook Kim J. Protective effects of puerariae radix extract and its single compounds on methylglyoxal-induced apoptosis in human retinal pigment epithelial cells. JOURNAL OF ETHNOPHARMACOLOGY 2014; 152:594-598. [PMID: 24486213 DOI: 10.1016/j.jep.2014.01.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 12/27/2013] [Accepted: 01/11/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE In Korea, Puerariae radix is a medicinal plant traditionally used to treat various diseases including diabetes mellitus. To provide pharmacological basis for Puerariae radix in the treatment of diabetes, we investigated the protective effects of the ethanolic extract and its single compounds on apoptosis associated with glycation in human retinal pigment epithelial (RPE) cells. MATERIALS AND METHODS In the present work, a quantified ethanolic extract or single compounds of Puerariae radix were selected to determine its anti-apoptotic effect in human RPE cells cultured with methylglyoxal (MG), which is a stimulator of glycation. To assess the protective effect of the extract or single compounds, the cytotoxicity assessment was performed using an MTT assay in the human RPE cells. Selected active compounds or extracts were tested by FACS analysis with annexin V staining for apoptosis. RESULTS Daidzein (1), daidzin (2), puerarin (3), 3'-hydroxy-daidzein 8-C-apiosyl (1→6) glucoside (4), and daidzein 8-C-apiosyl (1→6) glucoside (5), and pueroside B (6) were isolated from an ethanolic extract of Puerariae radix. MG-induced apoptosis was completely inhibited by Puerariae radix, ethanolic extract, and single compounds. Of the six major compounds, daidzin (2) and 3'-hydroxy-daidzein 8-C-apiosyl (1→6) glucoside (4) significantly inhibited MG-induced apoptosis. CONCLUSION Our results provide the first evidence that, due to its anti-glycation effect, Puerariae radix extract could inhibit MG-induced apoptosis in the cultured human RPE cells. These data suggest that Puerariae radix extract, especially its single compounds daidzin and 3'-hydroxy-daidzein 8-C-apiosyl (1→6) glucoside, has potential utility as a preventive agent for glycation-related diabetic retinopathy.
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Affiliation(s)
- Young Sook Kim
- Korean Medicine-Based Herbal Drug Development Group, Herbal Medicine Research Division, Korea Institute of Oriental Medicine (KIOM), Daejeon 305-811, Republic of Korea
| | - Ik Soo Lee
- Korean Medicine-Based Herbal Drug Development Group, Herbal Medicine Research Division, Korea Institute of Oriental Medicine (KIOM), Daejeon 305-811, Republic of Korea
| | - Jin Sook Kim
- Korean Medicine-Based Herbal Drug Development Group, Herbal Medicine Research Division, Korea Institute of Oriental Medicine (KIOM), Daejeon 305-811, Republic of Korea.
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Al-Shabrawey M, Elsherbiny M, Nussbaum J, Othman A, Megyerdi S, Tawfik A. Targeting Neovascularization in Ischemic Retinopathy: Recent Advances. EXPERT REVIEW OF OPHTHALMOLOGY 2014; 8:267-286. [PMID: 25598837 DOI: 10.1586/eop.13.17] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Pathological retinal neovascularization (RNV) is a common micro-vascular complication in several retinal diseases including retinopathy of prematurity, diabetic retinopathy, age-related macular degeneration and central vein occlusion. The current therapeutic modalities of RNV are invasive and although they may slow or halt the progression of the disease they are unlikely to restore normal acuity. Therefore, there is an urgent need to develop treatment modalities, which are less invasive and therefore associated with fewer procedural complications and systemic side effects. This review article summarizes our understanding of the pathophysiology and current treatment of RNV in ischemic retinopathies; lists potential therapeutic targets; and provides a framework for the development of future treatment modalities.
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Affiliation(s)
- Mohamed Al-Shabrawey
- Oral Biology/Anatomy, College of Dental Medicine, GeorgiaRegentsUniversity (GRU), Augusta GA, USA ; Ophthalmology and Vision Discovery Institute, Medical College of Georgia, GRU ; Anatomy, Mansoura Faculty of Medicine, Mansoura University-Egypt ; Vascular Biology Center, Medical College of Georgia, GRU
| | - Mohamed Elsherbiny
- Oral Biology/Anatomy, College of Dental Medicine, GeorgiaRegentsUniversity (GRU), Augusta GA, USA ; Ophthalmology and Vision Discovery Institute, Medical College of Georgia, GRU ; Anatomy, Mansoura Faculty of Medicine, Mansoura University-Egypt
| | - Julian Nussbaum
- Ophthalmology and Vision Discovery Institute, Medical College of Georgia, GRU
| | - Amira Othman
- Anatomy, Mansoura Faculty of Medicine, Mansoura University-Egypt
| | - Sylvia Megyerdi
- Oral Biology/Anatomy, College of Dental Medicine, GeorgiaRegentsUniversity (GRU), Augusta GA, USA
| | - Amany Tawfik
- Ophthalmology and Vision Discovery Institute, Medical College of Georgia, GRU ; Cellular Biology and Anatomy, Medical College of Georgia, GRU
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Zorena K, Raczyńska D, Raczyńska K. Biomarkers in diabetic retinopathy and the therapeutic implications. Mediators Inflamm 2013; 2013:193604. [PMID: 24311895 PMCID: PMC3839118 DOI: 10.1155/2013/193604] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 09/09/2013] [Indexed: 02/06/2023] Open
Abstract
The main problem both in type 1 (T1DM) and type 2 (T2DM) diabetes is the development of chronic vascular complications encompassing micro- as well as macrocirculation. Chronic complications lower the quality of life, lead to disability, and are the cause of premature death in DM patients. One of the chronic vascular complications is a diabetic retinopathy (DR) which leads to a complete loss of sight in DM patients. Recent trials show that the primary cause of diabetic retinopathy is retinal neovascularization caused by disequilibrium between pro- and antiangiogenic factors. Gaining knowledge of the mechanisms of action of factors influencing retinal neovascularization as well as the search for new, effective treatment methods, especially in advanced stages of DR, puts special importance on research concentrating on the implementation of biological drugs in DR therapy. At present, it is antivascular endothelial growth factor and antitumor necrosis factor that gain particular significance.
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Affiliation(s)
- Katarzyna Zorena
- Department of Clinical and Experimental Endocrinology, Institute of Maritime and Tropical Medicine, Medical University of Gdańsk, Powstania Styczniowego 9b, 81-519 Gdynia, Poland
| | - Dorota Raczyńska
- Department of Anesthesiology and Intensive Care Medicine, Medical University of Gdańsk, Poland
- Department and Clinic of Ophthalmology, Medical University of Gdańsk, Poland
| | - Krystyna Raczyńska
- Department and Clinic of Ophthalmology, Medical University of Gdańsk, Poland
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