Assessment of the 'LOC387715' gene polymorphism 'RS10490924' in a brazilian population with age-related macular degeneration

Orientador: Mônica Barbosa de MeloDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências MédicasResumo: Introdução: A degeneração macular relacionada à idade (DMRI) é uma doença crônica degenerativa que afeta a área macular da retina causando diminuição da visão central. É a causa mais comum de perda visual irreversível nos países desenvolvidos. A DMRI é caracterizada pela presença de drusas, anormalidades do epitélio pigmentar da retina (EPR), atrofia geográfica, descolamento do EPR, neovascularização de coróide e cicatriz disciforme. Sua etiologia permanece pouco esclarecida, entretanto fatores genéticos associados a fatores ambientais possuem papel na etiologia e na progressão da doença. Dentre as variações gênicas, uma associação entre o polimorfismo Ala69Ser do gene LOC387715/ARMS2 ( rs10490924 C/T ) e o desenvolvimento da DMRI tem sido relatada em diferentes populações. Objetivo: O objetivo deste estudo foi avaliar se o polimorfismo rs10490924 está associado com a DMRI em uma amostra da população brasileira. Métodos: Cento e vinte e seis pacientes, sem parentesco, com DMRI (idade média de 74,17 ± 7,64) foram comparados com 86 controles saudáveis (idade média 71,82 ± 7,12). Os sujeitos do estudo foram classificados de acordo com o tipo de DMRI em DMRI seca e DMRI exsudativa. O polimorfismo LOC387715/ARMS2 rs10490924 foi avaliado através da reação em cadeia da polimerase e sequenciamento direto. Resultados: A frequência do alelo T foi significativamente maior em pacientes com DMRI do que nos controles (39,6% em comparação com 20,3%, p = 0,00002). O odds ratio (OR) para DMRI foi de 2,05 (IC95 % 1,09-3,89 ) para os heterozigotos (TG) e 8,45 ( IC95 % 2,21-37,82 ) para homozigotos (TT). Conclusões: Os resultados sugerem que há uma contribuição do SNP rs10490924 do gene LOC387715/ARMS2 para susceptibilidade à DMRI nesta amostra da população brasileiraAbstract: Introduction: Age-related macular degeneration (AMD) is a chronic degenerative disease that affects the macular area causing decreased central vision. It is the most common cause of irreversible vision loss in developed countries. It is characterized by the presence of drusen, abnormalities of the retinal pigment epithelium (RPE), geographic atrophy, RPE detachment, choroidal neovascularization, and disciform scar. The etiology of AMD remains poorly understood, but genetic factors associated with environmental factors have a role in the etiology and progression of the disease. Among the analyzed genetic variations, an association between LOC387715/ARMS2 (rs10490924) gene polymorphism and AMD has been reported in different populations. Purpose: The aim of this study was to evaluate whether this polymorphism is associated with AMD in a Brazilian cohort. Methods: A hundred and twenty six unrelated AMD patients (mean age 74.17 ± 7.64) were compared with 86 healthy controls (mean age 71.82 ± 7.12). Study subjects were classified according to the type of AMD in dry and wet AMD. The LOC387715/ARMS2 rs10490924 polymorphism was evaluated through polymerase chain reaction and direct sequencing. Results: The T allele frequency was significantly higher in AMD patients than controls (39.6% compared to 20.3%, p = 0,00002). The odds ratio (OR) for AMD was 2.05 (CI95% 1.09-3.89) for heterozygotes (TG) and 8.45 (CI95% 2.21-37.82) for homozygotes (TT). Conclusions: These results suggest that there is a contribution of the rs10490924 SNP of the LOC387715/ARMS2 gene to AMD susceptibility in this sample of Brazilian populationMestradoOftalmologiaMestre em Ciências Médica

Association Of Loc387715/arms2 (rs10490924) Gene Polymorphism With Age-related Macular Degeneration In The Brazilian Population

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Background: An association between LOC387715/ARMS2 (rs10490924) gene polymorphism and AMD has been reported. The aim of this study was to evaluate whether this polymorphism is associated with AMD in a Brazilian cohort. Materials and Methods: In total, 126 unrelated AMD patients (mean age 74.17 +/- 7.64) were compared with 86 healthy controls (mean age 71.82 +/- 7.12). Study subjects were classified according to the International ARM Epidemiological Study Group definition for early and late-stage AMD. LOC387715/ARMS2 rs10490924 polymorphism was evaluated through polymerase chain reaction and direct sequencing. Results: The T allele frequency was significantly higher in AMD patients than in controls (39.6% compared to 20.3%). The odds ratio (OR) for AMD was 2.05 (95% CI 1.13-3.71) for heterozygotes (TG) and 8.32 (95% CI 2.30-45.99) for homozygotes (TT). Conclusions: These results suggest that there is a contribution of the rs10490924 SNP of the LOC387715/ARMS2 gene to AMD susceptibility in this sample of the Brazilian population.363224228Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)CNPq [472645/2008

Assessment of the effect of intravitreal triamcinolone acetonide on the chorioretinal and vitreous inflammatory reaction to cryotherapy in rabbits

PURPOSE: To evaluate the inflammatory response in the choroid, retina and vitreous in rabbit eyes underwent cryotherapy followed by intravitreal triamcinolone acetonide and to compare with those underwent cryotherapy followed by intravitreal injection of saline solution. METHODS: This is a prospective case-control study. Surgical procedures were performed in eleven rabbits. Two animals were excluded because they did not complete the postoperative period or had intraoperative or postoperative complications. All rabbits underwent superior temporal peritomy and transscleralcryotherapy in both eyes. After cryotherapy, animals received intravitreal injection of triamcinolone acetonide in one eye and saline solution in the fellow eye. Animals were sacrificed seven days after the procedure and their eyes were enucleated. Histological sections of eyeballs were prepared and the vitreous humor was aspirated. The count of inflammatory cells was performed by light microscopy. RESULTS: Histological sections of both eyes of nine rabbits were analyzed. Inflammatory cells were found only in the choroid. There was no statistically significant difference in the number of inflammatory cells between the two groups, regardless of cell type analyzed. CONCLUSION: This study showed no statistically significant difference between the use or absence of intravitreal triamcinolone acetonide in the inflammatory response to cryotherapy in rabbit eyes. Studies with larger samples are needed to confirm the trend of this paper

Ocular findings in Brazilian identical twins with Cohen syndrome: case report Achados oftalmológicos em gêmeos idênticos brasileiros com síndrome de Cohen: relato de caso

A case of identical male twins with Cohen syndrome who present multiple ophthalmic findings is reported. The patients were identical 16 year-old twin boys who showed down slanting eyelids, mild ptosis, high-grade myopia, small cortical lens opacities, posterior subcapsular cataracts, myotic and corectopic pupils with poor dilation due to focal iris atrophy and retinochoroidal dystrophy. Ophthalmologists must be aware of the ocular and systemic findings of Cohen syndrome in the evaluation of young patients with mental retardation and visual impairment.<br>Relata-se caso de gêmeos idênticos com síndrome de Cohen que apresentam múltiplos achados oftalmológicos. Os pacientes eram gêmeos idênticos, do sexo masculino, que apresentavam pálpebras em forma de onda, ptose moderada, alta miopia, opacidades cristalinianas corticais discretas, catarata subcapsular posterior, pupilas mióticas e corectópicas com pobre dilatação devido à atrofia focal de íris, além de distrofia retinocoroidiana. Os oftalmologistas devem estar atentos quanto aos achados oftalmológicos e sistêmicos da síndrome de Cohen na avaliação de pacientes jovens com retardo mental e baixa visão

Ocular Findings In Brazilian Identical Twins With Cohen Syndrome: Case Report.

A case of identical male twins with Cohen syndrome who present multiple ophthalmic findings is reported. The patients were identical 16 year-old twin boys who showed down slanting eyelids, mild ptosis, high-grade myopia, small cortical lens opacities, posterior subcapsular cataracts, myotic and corectopic pupils with poor dilation due to focal iris atrophy and retinochoroidal dystrophy. Ophthalmologists must be aware of the ocular and systemic findings of Cohen syndrome in the evaluation of young patients with mental retardation and visual impairment.72815-

Association Of Loc387715/arms2 (rs10490924) Gene Polymorphism With Age-related Macular Degeneration In The Brazilian Population.

Abstract Background: An association between LOC387715/ARMS2 (rs10490924) gene polymorphism and AMD has been reported. The aim of this study was to evaluate whether this polymorphism is associated with AMD in a Brazilian cohort. Materials and Methods: In total, 126 unrelated AMD patients (mean age 74.17 ± 7.64) were compared with 86 healthy controls (mean age 71.82 ± 7.12). Study subjects were classified according to the International ARM Epidemiological Study Group definition for early and late-stage AMD. LOC387715/ARMS2 rs10490924 polymorphism was evaluated through polymerase chain reaction and direct sequencing. Results: The T allele frequency was significantly higher in AMD patients than in controls (39.6% compared to 20.3%). The odds ratio (OR) for AMD was 2.05 (95% CI 1.13-3.71) for heterozygotes (TG) and 8.32 (95% CI 2.30-45.99) for homozygotes (TT). Conclusions: These results suggest that there is a contribution of the rs10490924 SNP of the LOC387715/ARMS2 gene to AMD susceptibility in this sample of the Brazilian population.1-

Association of LOC387715/ARMS2 (RS10490924) gene polymorphism with age-related macular degeneration in the brazilian population

An association between LOC387715/ARMS2 (rs10490924) gene polymorphism and AMD has been reported. The aim of this study was to evaluate whether this polymorphism is associated with AMD in a Brazilian cohort. In total, 126 unrelated AMD patients (mean age 74.17 +/- 7.64) were compared with 86 healthy controls (mean age 71.82 +/- 7.12). Study subjects were classified according to the International ARM Epidemiological Study Group definition for early and late-stage AMD. LOC387715/ARMS2 rs10490924 polymorphism was evaluated through polymerase chain reaction and direct sequencing. The T allele frequency was significantly higher in AMD patients than in controls (39.6% compared to 20.3%). The odds ratio (OR) for AMD was 2.05 (95% CI 1.13-3.71) for heterozygotes (TG) and 8.32 (95% CI 2.30-45.99) for homozygotes (TT). These results suggest that there is a contribution of the rs10490924 SNP of the LOC387715/ARMS2 gene to AMD susceptibility in this sample of the Brazilian population363224228CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ472645/200

Effects of pre‐operative isolation on postoperative pulmonary complications after elective surgery: an international prospective cohort study

We aimed to determine the impact of pre-operative isolation on postoperative pulmonary complications after elective surgery during the global SARS-CoV-2 pandemic. We performed an international prospective cohort study including patients undergoing elective surgery in October 2020. Isolation was defined as the period before surgery during which patients did not leave their house or receive visitors from outside their household. The primary outcome was postoperative pulmonary complications, adjusted in multivariable models for measured confounders. Pre-defined sub-group analyses were performed for the primary outcome. A total of 96,454 patients from 114 countries were included and overall, 26,948 (27.9%) patients isolated before surgery. Postoperative pulmonary complications were recorded in 1947 (2.0%) patients of which 227 (11.7%) were associated with SARS-CoV-2 infection. Patients who isolated pre-operatively were older, had more respiratory comorbidities and were more commonly from areas of high SARS-CoV-2 incidence and high-income countries. Although the overall rates of postoperative pulmonary complications were similar in those that isolated and those that did not (2.1% vs 2.0%, respectively), isolation was associated with higher rates of postoperative pulmonary complications after adjustment (adjusted OR 1.20, 95%CI 1.05-1.36, p = 0.005). Sensitivity analyses revealed no further differences when patients were categorised by: pre-operative testing; use of COVID-19-free pathways; or community SARS-CoV-2 prevalence. The rate of postoperative pulmonary complications increased with periods of isolation longer than 3 days, with an OR (95%CI) at 4-7 days or &gt;= 8 days of 1.25 (1.04-1.48), p = 0.015 and 1.31 (1.11-1.55), p = 0.001, respectively. Isolation before elective surgery might be associated with a small but clinically important increased risk of postoperative pulmonary complications. Longer periods of isolation showed no reduction in the risk of postoperative pulmonary complications. These findings have significant implications for global provision of elective surgical care