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Related Concept Videos

Diabetic Retinopathy01:27

Diabetic Retinopathy

DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...

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Racial Variations in Retinal Oxygen Metabolic Biomarkers in Diabetic Retinopathy: A Pilot Study.

Katherine Tavasoli1, Sophie Leahy2, Norman P Blair3

  • 1Keck School of Medicine, University of Southern California, Los Angeles, California, USA, usc.edu.

Journal of Ophthalmology
|May 7, 2026
PubMed
Summary

Race influences diabetic retinopathy (DR) biomarkers. This study found significant interactions between race and diagnosis on retinal oxygen metabolism, highlighting the need for race-specific DR clinical evaluations.

Keywords:
diabetesoxygenraceretina

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Area of Science:

  • Ophthalmology
  • Diabetology
  • Medical Imaging

Background:

  • Diabetic retinopathy (DR) prevalence and progression are influenced by race.
  • Understanding racial disparities in DR requires examining underlying physiological differences.

Purpose of the Study:

  • To investigate associations between race and retinal oxygen metabolic biomarkers.
  • To test if race impacts oxygen delivery (DO2), metabolism (MO2), and extraction fraction (OEF) in individuals without diabetes or with early-stage DR.

Main Methods:

  • 104 subjects categorized into nondiabetic (ND), diabetic without DR (NDR), or mild nonproliferative DR (mild NPDR).
  • Racial groups included Asian (AS), African American (AA), Hispanic White (HW), and non-Hispanic White (NHW).
  • Retinal oxygen metabolic biomarkers (DO2, MO2, OEF) measured using multimodal imaging.

Main Results:

  • Significant interactions between race and diagnosis group were observed for retinal oxygen metabolic biomarkers.
  • Specific racial differences in MO2, DO2, and OEF were noted across different diagnostic groups.
  • For instance, MO2 differed between NDR and mild NPDR in the AS group, and DO2 varied by race in the NDR group.

Conclusions:

  • Preliminary findings show associations between race and retinal oxygen metabolic biomarkers.
  • Further research in larger cohorts is necessary to establish race-specific normal baselines.
  • These baselines are crucial for clinical evaluation and addressing racial differences in DR.