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Gurung RL, FitzGerald LM, McComish BJ, Verma N, Burdon KP. Identifying Genetic Risk Factors for Diabetic Macular Edema and the Response to Treatment. J Diabetes Res 2020; 2020:5016916. [PMID: 33274237 PMCID: PMC7683113 DOI: 10.1155/2020/5016916] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 10/31/2020] [Accepted: 11/05/2020] [Indexed: 12/23/2022] Open
Abstract
Diabetic retinopathy (DR) is the most common microvascular complication of diabetes mellitus (DM). DR is complex and the term encompasses several clinical subtypes of diabetic eye disease, including diabetic macular edema (DME), the most frequent cause of central vision loss in DR patients. Both genetic and environmental factors contribute to the pathophysiology of DR and its subtypes. While numerous studies have identified several susceptibility genes for DR, few have investigated the impact of genetics on DME susceptibility. This review will focus on the current literature surrounding genetic risk factors associated with DME. We will also highlight the small number of studies investigating the genetics of response to antivascular endothelial growth factor (anti-VEGF) injection, which is used to treat DME.
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Affiliation(s)
- Rajya L. Gurung
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Liesel M. FitzGerald
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Bennet J. McComish
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Nitin Verma
- School of Medicine, University of Tasmania, Hobart, TAS, Australia
| | - Kathryn P. Burdon
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
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da Cruz Jung IE, da Cruz IBM, Barbisan F, Trott A, Houenou LJ, Osmarin Turra B, Duarte T, de Souza Praia R, Maia-Ribeiro EA, da Costa Escobar Piccoli J, Bica CG, Duarte MMMF. Superoxide imbalance triggered by Val16Ala-SOD2 polymorphism increases the risk of depression and self-reported psychological stress in free-living elderly people. Mol Genet Genomic Med 2019; 8:e1080. [PMID: 31891227 PMCID: PMC7005615 DOI: 10.1002/mgg3.1080] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 10/03/2019] [Accepted: 11/14/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Oxidative stress and chronic inflammatory states triggered by a single-nucleotide polymorphism (SNP) in superoxide dismutase manganese-dependent gene (Val16Ala-SOD2) have been associated with the risk of developing several chronic, nontransmissible diseases. However, it is still not clear whether the VV-SOD2 genotype that causes higher basal superoxide anion levels has any impact on the risk for depression and self-reported psychological stress in elderly people. METHODS In the present study, we tested this hypothesis using a case-control study where depression was detected using the Geriatric Depression Scale-15 (GDS-15). A total of 612 Brazilian free-living elderly subjects with a mean age of 67.1 ± 7.1 years old (number of controls, C = 497, and depressive individuals, D = 115) were included in this study. All participants had similar social, health, and lifestyle variables, with the exception of polypharmacy (≥5 medicines daily intake), which was higher in the D group, compared to C subjects. RESULTS Our results showed that the VV-SOD2 genotype significantly increased the risk for depression and psychological stress in the elderly subjects, independently of sex/gender, age, and other prior diseases and health indicators (depression risk = 1.842, 1.109-3.061 95% CI, p = .018). VV-subjects also had a higher daily intake of antidepressants, anxiolytics, and anti-inflammatory drugs than A-allele subjects. CONCLUSION Our findings support the hypothesis that genetically induced oxidative superoxide-hydrogen peroxide imbalance may be involved in an increased risk for developing depression and psychological stress in free-living elderly people without other chronic nontransmissible diseases.
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Affiliation(s)
- Ivo Emilio da Cruz Jung
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Ivana Beatrice Mânica da Cruz
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.,Programa de Pós-Graduação em Gerontologia, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Fernanda Barbisan
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.,Programa de Pós-Graduação em Gerontologia, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Alexis Trott
- Departamento de Ciências da Vida, Universidade Regional do Noroeste do Estado do Rio Grande do Sul, Ijuí, RS, Brazil
| | - Lucien J Houenou
- Biotechnology Department, Forsyth Technical Community College, Winston-Salem, NC, USA
| | - Bárbara Osmarin Turra
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Thiago Duarte
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | | | | | | | - Claudia Giugliano Bica
- Programa de Pós-Graduação em Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brazil
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