June 2013
Volume 54, Issue 15
Free
ARVO Annual Meeting Abstract  |   June 2013
Relating risk genotypes for diabetic retinopathy with color vision performance
Author Affiliations & Notes
  • Mirella Gualtieri
    Experimental Psychology, University of Sao Paulo, Sao Paulo, Brazil
  • Daniela Bonci
    Neuroscience & Behavio, University of Sao Paulo, Sao Paulo, Brazil
  • Valéria Duarte Garcia
    Neuroscience & Behavio, University of Sao Paulo, Sao Paulo, Brazil
  • Stephen Juel
    Minority Health and Health Disparities International Research Training Program, Menphis, TN
  • Francisco Max Damico
    Ophthalmology, University of Sao Paulo, Sao Paulo, Brazil
  • Maureen Neitz
    Ophthalmology, University of Washington, Seattle, WA
  • Dora Ventura
    Experimental Psychology, University of Sao Paulo, Sao Paulo, Brazil
    Neuroscience & Behavio, University of Sao Paulo, Sao Paulo, Brazil
  • Footnotes
    Commercial Relationships Mirella Gualtieri, None; Daniela Bonci, None; Valéria Duarte Garcia, FAPESP (F); Stephen Juel, None; Francisco Max Damico, None; Maureen Neitz, Genzyme (F), Alcon (F), Alcon (P); Dora Ventura, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science June 2013, Vol.54, 6198. doi:https://doi.org/
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Mirella Gualtieri, Daniela Bonci, Valéria Duarte Garcia, Stephen Juel, Francisco Max Damico, Maureen Neitz, Dora Ventura; Relating risk genotypes for diabetic retinopathy with color vision performance. Invest. Ophthalmol. Vis. Sci. 2013;54(15):6198. doi: https://doi.org/.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract
 
Purpose
 

Three genetic markers of erythropoietin (EPO) expression have been recently identified as either risk- or protective-factors for the development of proliferative diabetic retinopathy (PDR). These markers are located at the regions of single nucleotide polymorphisms (SNP) rs1617640, rs507392, and rs551238. Homozygous or heterozygous genotypes at these three locations are significantly associated with a higher or lower risk of PDR in diabetics (Tong et al 2008; Abhary et al 2010). We sought to analyze how the presence of the different genotypes at these 3 SNP locations relates to functional losses observed prior to retinopathy in a group of type 1 and type 2 diabetics.

 
Methods
 

Visual function was assessed by color discrimination thresholds measured along protan, deutan and a tritan axes, as well a MacAdam ellipse (Cambridge Colour Test). The EPO markers were identified after DNA extraction from blood cells by sequencing of PCR products. The functional and the genetic assessments were performed in a group of 29 (13 type 1; 16 type 2) diabetic patients and a group of 17 healthy controls.

 
Results
 

Colour vision thresholds from the patients were higher than controls’ for all three color confusion axes and the ellipse area. The presence of the risk genotype coincided with worse color vision only for the SNP rs1617640. Control subjects with the different rs1617640 genotypes did not have different color vision (figures 1 and 2). The presence of different genotypes for the SNP rs507392, and rs551238 was not associated with different color vision results.

 
Conclusions
 

Diabetic patients who were carriers of the risk genotype at the SNP location rs1617640 - a maker for the development of PDR - were also the patients with worse color vision thresholds The same association was not observed for the other EPO gene SNP locations evaluated. The association between factors related to vascular abnormality (EPO marker) and neural loss (color vision) contribute to the intricate puzzle of the interaction between vascular and neural abnormalities which is at the core of hypotheses about the etiology of diabetic visual losses.

 
 
Color vision thresholds from the diabetics. Carriers of the allele T have higher thresholds.
 
Color vision thresholds from the diabetics. Carriers of the allele T have higher thresholds.
 
 
Color vision thresholds from controls. Thresholds did not change across genotypes.
 
Color vision thresholds from controls. Thresholds did not change across genotypes.
 
Keywords: 499 diabetic retinopathy • 471 color vision • 539 genetics  
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×