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Related Experiment Video

Updated: Feb 1, 2026

On-Chip Endothelial Inflammatory Phenotyping
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RF/6A Chorioretinal Cells Do Not Display Key Endothelial Phenotypes.

Ryan D Makin1,2, Ivana Apicella1,2, Yosuke Nagasaka3

  • 1Center for Advanced Vision Science, University of Virginia School of Medicine, Charlottesville, Virginia, United States.

Investigative Ophthalmology & Visual Science
|December 4, 2018
PubMed
Summary

The widely used RF/6A cell line does not possess key endothelial cell characteristics. Comprehensive authentication beyond DNA profiling is crucial for reliable biomedical research involving cell lines.

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Area of Science:

  • Biomedical Science
  • Cell Biology
  • Ophthalmology

Background:

  • Inauthentic cell lines compromise biomedical research integrity.
  • Current authentication often relies solely on DNA profiling.
  • The RF/6A cell line is commonly used to study retinal and choroidal angiogenesis.

Purpose of the Study:

  • To anatomically, transcriptionally, and functionally authenticate the RF/6A chorioretinal cell line.
  • To assess its suitability as an endothelial cell model for angiogenesis studies.

Main Methods:

  • Multiple RF/6A cell batches from various distributors were analyzed.
  • Evaluated genetic, transcriptomic, anatomic, and functional properties.
  • Compared RF/6A cells to primary human endothelial cells.

Main Results:

  • RF/6A cells lacked endothelial gene expression signatures.
  • Key endothelial markers were undetectable or very low.
  • RF/6A cells failed to exhibit endothelial functions like LDL uptake and VEGFA response.

Conclusions:

  • Multiple RF/6A sources lack essential endothelial cell phenotypes.
  • RF/6A cells are unsuitable models for retinal or choroidal endothelial cells.
  • Cell line authentication requires anatomic, transcriptional, and functional assessments.