scholarly journals Joint Effect of CFH and ARMS2/HTRA1 Polymorphisms on Neovascular Age-Related Macular Degeneration in Chinese Population

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Kai Fang ◽  
Pei Gao ◽  
Jun Tian ◽  
Xueying Qin ◽  
Wenzhen Yu ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Chinese Population ◽  
Cross Validation ◽  
Joint Effect ◽  
Age Related Macular Degeneration ◽  
Gene Variants ◽  
Neovascular Amd ◽  
Common Pathway ◽  
Age Related ◽  
Potential Interactions

Purpose. The etiology of neovascular age-related macular degeneration (nAMD) cannot be completely explained by identified environmental risk factors or single-locus gene variants. This study was to explore the potential interactions among gene variants on nAMD in Chinese population.Methods. 43 SNPs located in different genes were genotyped in 932 Chinese individuals (464 nAMD patients and 468 controls). We explored the potential interactions among gene variants using generalized multifactor dimensionality reduction (GMDR) algorithm and the method to measure the departure from the additivity model.Results. The joint effect that involvedCFHrs1061170 andHTRA1rs3793917 was shown statistically significant (P< 0.001) with the highest cross-validation consistency (10/10) and the best testing balanced accuracy (64.50%). In addition, based on the method to measure the departure from the additivity model, the synergy index (S) was 2.63 (1.09–6.38) and the attributable proportion due to interaction (AP) was 55.7% (21.4%–89.9%), which suggested that a common pathway may exist for these genes for nAMD. Those who carried CC for rs3793917 and TC/CC for rs1061170 were at the highest risk of nAMD (OR: 9.76, 95% CI: 4.65–20.51).Conclusions. Evidence that the joint effect that involvedCFHandARMS2/HTRA1may contribute to the risk of neovascular AMD in Chinese population was obtained.

RAD51 gene is associated with advanced age-related macular degeneration in Chinese population

2013 ◽  
Vol 46 (16-17) ◽  
pp. 1689-1693 ◽  
Author(s):  
Jie Zhou ◽  
Dan Wang ◽  
Junjun Zhang ◽  
Meixia Zhang ◽  
Fang Lu ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Chinese Population ◽  
Age Related Macular Degeneration ◽  
Advanced Age ◽  
Rad51 Gene ◽  
Age Related

scholarly journals Long-term Use of Aspirin and Age-related Macular Degeneration

2013 ◽  
Vol 06 (02) ◽  
pp. 144 ◽  
Author(s):  
William G Christen ◽  
Emily Y Chew ◽  
◽  
Keyword(s):  
Macular Degeneration ◽  
Observational Studies ◽  
Randomized Trials ◽  
Epidemiologic Studies ◽  
Age Related Macular Degeneration ◽  
Neovascular Amd ◽  
Age Related ◽  
The Us ◽  
Regular Aspirin

Recent findings from observational epidemiologic studies have raised concern about a possible adverse effect of regular aspirin use in age-related macular degeneration (AMD), and in particular neovascular AMD, which is the leading cause of severe irreversible blindness in the US. In this report, we consider these findings in light of the relative strengths and limitations of observational studies and randomized trials. While the findings are important and warrant further investigation, the inherent limitations of observation studies, most notably uncontrolled confounding, preclude an interpretation of causality. Alternatively, the most reliable evidence with which to evaluate the effects of regular aspirin use in AMD will derive from well-designed randomized trials of sufficient size and duration.

scholarly journals Drusen and pigment abnormality predict the development of neovascular age-related macular degeneration in Japanese patients

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0255213
Author(s):  
Shoji Notomi ◽  
Satomi Shiose ◽  
Keijiro Ishikawa ◽  
Yosuke Fukuda ◽  
Kumiko Kano ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Japanese Patients ◽  
Age Related Macular Degeneration ◽  
Neovascular Amd ◽  
Fellow Eye ◽  
Factors Associated ◽  
Asian Populations ◽  
Age Related ◽  
The Mean

Drusen are known to be the important hallmark to predict the development of age-related macular degeneration (AMD). The prevalence of drusen is lower in Asians compared with Caucasians so that the role of signs constituting early AMD is not well established in Asian populations as in Western countries. In this study, we retrospectively investigated clinical characteristics and 5-year incidence of neovascular AMD (nAMD) in the fellow eye of unilateral nAMD patients. Of 296 consecutive unilateral nAMD patients who had been followed up more than 5 years, 170 typical AMD, 119 polypoidal choroidal vasculopathy, and 7 retinal angiomatous proliferation were included. To examine factors associated with nAMD occurrence in the fellow eye, drusen and pigmentary abnormality in the fellow eye were classified into 4 categories; Category 1: no or small drusen < 63 μm (37.2%), Category 2: 63–125 μm medium drusen or pigmentary abnormality (22.2%), Category 3: large drusen > 125 μm (25.0%), Category P: pachydrusen (15.5%). The mean sub-foveal choroidal thickness (SFCT) was Category 1: 276 μm, Category 2: 308 μm, Category 3: 246 μm, and Category P: 302 μm, respectively. Of note, SFCT in Category 2 and Category P was significantly larger than those of Category 3. Finally, the 5-year incidence of nAMD in the fellow eye was 32/296 (10.8%); Category 1: 0/110 (0%), Category 2: 12/66 (18.2%), Category 3: 20/74 (27.0%), and Category P: 0/46 (0%). Thus, signs of intermediate AMD (large drusen) as well as those of early AMD, especially the pigmentary abnormality, may contribute to development of bilateral nAMD in Japanese patients.

Epidemiology Prevalence and Incidence in Dry-Form (Non-Neovascular) Age-Related Macular Degeneration

2017 ◽  
pp. 97-99
Keyword(s):  
Macular Degeneration ◽  
Elderly Population ◽  
The Elderly ◽  
Epidemiologic Studies ◽  
Age Related Macular Degeneration ◽  
Neovascular Amd ◽  
Age Related ◽  
Dry Amd ◽  
Degenerative Disorder ◽  
Definition Of

Age-related macular degeneration (AMD) is a degenerative disorder of the central retina and represents the leading cause of severe visual impairment in the elderly population of industrialized societies. It is known that it currently exists between 30 and 50 million people around the world and is estimated that will have doubled by the end of the coming decade. Several large epidemiologic studies have evaluated the prevalence of non-neovascular or so-called dry AMD. There is some variation in the prevalence of non-neovascular AMD depending on the exact definition of AMD. All of them report a higher prevalence of early AMD and an increasing prevalence with age. It is seen most in Caucasians and least in people with Africans and it is not related to gender.

Association of Genetic Polymorphisms and Age-Related Macular Degeneration in Chinese Population

2012 ◽  
Vol 53 (7) ◽  
pp. 4262 ◽  
Author(s):  
Jun Tian ◽  
Wenzhen Yu ◽  
Xueying Qin ◽  
Kai Fang ◽  
Qing Chen ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Genetic Polymorphisms ◽  
Chinese Population ◽  
Age Related Macular Degeneration ◽  
Age Related
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