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The ARMS2 A69S Polymorphism Is Associated with Delayed Rod-Mediated Dark Adaptation in Eyes at Risk for Incident Age-Related Macular Degeneration.
Ophthalmology ( IF 13.7 ) Pub Date : 2018-10-31 , DOI: 10.1016/j.ophtha.2018.10.037
Robert F Mullins 1 , Gerald McGwin 2 , Karen Searcey 3 , Mark E Clark 3 , Elizabeth L Kennedy 1 , Christine A Curcio 3 , Edwin M Stone 1 , Cynthia Owsley 3
Affiliation  

PURPOSE To examine the association between sequence variants in genetic risk factors for age-related macular degeneration (AMD) and delayed rod-mediated dark adaptation (RMDA), the first functional biomarker for incident AMD, in older adults with normal macular health and early AMD. DESIGN Cross-sectional. PARTICIPANTS Adults 60 years of age or older showing normal macular health (defined as both eyes at step 1 on the Age-Related Eye Disease Study 9-step AMD classification system) and those with AMD in one or both eyes (defined as steps 2-9). METHODS Single nucleotide polymorphisms were genotyped in the complement factor H (CFH) and ARMS2 genes using a Taqman assay. Rod-mediated dark adaptation was assessed in 1 eye after photobleach with targets centered at 5° on the inferior vertical meridian. Rate of dark adaptation was defined by rod intercept time (RIT), duration (in minutes) required for sensitivity to reach a criterion sensitivity level in the latter half of the second component of rod recovery. Associations between CFH and ARMS2 polymorphisms and RMDA were adjusted for age and smoking. MAIN OUTCOME MEASURE Rod intercept time. RESULTS The sample consisted of 543 participants having both genotype and RIT determination; 408 showed normal macular health and 135 demonstrated AMD, most having early AMD (124 of 135). For the combined sample, higher RIT (slower RMDA) was observed for both the A69S variant in ARMS2 and the Y402H variant in CFH (adjusted P = 0.0001 and P = 0.0023, respectively). For healthy participants, the A69S variant in ARMS2 was associated with higher RIT (adjusted P = 0.0011), whereas the Y402H variant in CFH was not (adjusted P = 0.2175). For AMD patients, the A69S variant of ARMS2 and the Y402H variant of CFH were associated with higher RIT (adjusted P = 0.0182 and P = 0.0222, respectively). Those with a larger number of high-risk ARMS2 and CFH alleles showed higher RIT, in both healthy and AMD groups (adjusted P = 0.0002 and P < 0.0001, respectively). CONCLUSIONS We report a novel association wherein older adults with high-risk ARMS2 and CFH genotypes are more likely to demonstrate delayed RMDA, the first functional biomarker for incident early AMD. Before the AMD clinical phenotype is present, those showing normal macular health with the ARMS2 A69S allele demonstrate delayed RMDA. Understanding ARMS2 function is a research priority.

中文翻译:

ARMS2 A69S基因多态性与年龄相关性黄斑变性风险中的杆延迟介导的暗适应有关。

目的探讨在黄斑健康正常和早期AMD的老年人中,年龄相关性黄斑变性(AMD)的遗传危险因素序列变异与延迟杆介导的暗适应(RMDA)之间的关联,后者是发生AMD的首个功能性生物标志物。设计横截面。参与者60岁以上的成年人表现出正常的黄斑健康(定义为与年龄相关的眼病研究9步AMD分类系统的第1步中的两只眼睛),以及一只或两只眼睛都患有AMD的成年人(定义为第2步) 9)。方法采用Taqman分析法在补体因子H(CFH)和ARMS2基因中对单核苷酸多态性进行基因分型。光漂白后1只眼的杆介导的暗适应度进行了评估,目标位于下垂直子午线上的5°处。暗适应率由棒截获时间(RIT),在棒回收的第二部分的后半部分中达到标准灵敏度水平所需的灵敏度所需的持续时间(以分钟为单位)定义。CFH和ARMS2多态性与RMDA之间的关联已根据年龄和吸烟情况进行了调整。主要观察指标棒截距时间。结果样本由543名既有基因型又有RIT测定的参与者组成。408眼显示黄斑健康正常,135眼显示AMD,多数早期AMD(135眼中的124眼)。对于组合样品,ARMS2中的A69S变体和CFH中的Y402H变体均观察到较高的RIT(较低的RMDA)(分别调整为P = 0.0001和P = 0.0023)。对于健康参与者,ARMS2中的A69S变体与较高的RIT相关(调整后的P = 0.0011),而CFH中没有Y402H变体(调整后的P = 0.2175)。对于AMD患者,ARMS2的A69S变体和CFH的Y402H变体与更高的RIT相关(分别调整后的P = 0.0182和P = 0.0222)。在健康组和AMD组中,那些具有大量高危ARMS2和CFH等位基因的人显示更高的RIT(分别调整后的P = 0.0002和P <0.0001)。结论我们报道了一种新型关联,其中具有高风险ARMS2和CFH基因型的老年人更有可能表现出延迟的RMDA,RMDA是发生早期AMD的第一个功能性生物标志物。在出现AMD临床表型之前,那些具有ARMS2 A69S等位基因表现出正常黄斑健康的患者证明了RMDA延迟。了解ARMS2功能是研究的重点。ARMS2的A69S变体和CFH的Y402H变体与较高的RIT相关(分别调整后的P = 0.0182和P = 0.0222)。在健康组和AMD组中,那些具有大量高危ARMS2和CFH等位基因的人显示更高的RIT(分别调整后的P = 0.0002和P <0.0001)。结论我们报道了一种新型关联,其中具有高风险ARMS2和CFH基因型的老年人更有可能表现出延迟的RMDA,RMDA是发生早期AMD的第一个功能性生物标志物。在出现AMD临床表型之前,那些具有ARMS2 A69S等位基因表现出正常黄斑健康的患者证明了RMDA延迟。了解ARMS2功能是研究的重点。ARMS2的A69S变体和CFH的Y402H变体与较高的RIT相关(分别调整后的P = 0.0182和P = 0.0222)。在健康组和AMD组中,那些具有大量高危ARMS2和CFH等位基因的人显示更高的RIT(分别调整后的P = 0.0002和P <0.0001)。结论我们报道了一种新型关联,其中具有高风险ARMS2和CFH基因型的老年人更有可能表现出延迟的RMDA,RMDA是发生早期AMD的第一个功能性生物标志物。在出现AMD临床表型之前,那些具有ARMS2 A69S等位基因表现出正常黄斑健康的患者证明了RMDA延迟。了解ARMS2功能是研究的重点。在健康组和AMD组中,那些具有大量高危ARMS2和CFH等位基因的人显示更高的RIT(分别调整后的P = 0.0002和P <0.0001)。结论我们报道了一种新型关联,其中具有高风险ARMS2和CFH基因型的老年人更有可能表现出延迟的RMDA,RMDA是发生早期AMD的第一个功能性生物标志物。在出现AMD临床表型之前,那些具有ARMS2 A69S等位基因表现出正常黄斑健康的患者证明了RMDA延迟。了解ARMS2功能是研究的重点。在健康组和AMD组中,那些具有大量高危ARMS2和CFH等位基因的人显示更高的RIT(分别调整后的P = 0.0002和P <0.0001)。结论我们报道了一种新型关联,其中具有高风险ARMS2和CFH基因型的老年人更有可能表现出延迟的RMDA,RMDA是发生早期AMD的第一个功能性生物标志物。在出现AMD临床表型之前,那些具有ARMS2 A69S等位基因表现出正常黄斑健康的患者证明了RMDA延迟。了解ARMS2功能是研究的重点。早期AMD事件的首个功能性生物标志物。在出现AMD临床表型之前,那些具有ARMS2 A69S等位基因表现出正常黄斑健康的患者证明了RMDA延迟。了解ARMS2功能是研究的重点。早期AMD事件的首个功能性生物标志物。在出现AMD临床表型之前,那些具有ARMS2 A69S等位基因表现出正常黄斑健康的患者证明了RMDA延迟。了解ARMS2功能是研究的重点。
更新日期:2018-10-31
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