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Related Experiment Video

Updated: Mar 1, 2026

Characterization of a Novel Human Organotypic Retinal Culture Technique
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Cell-cell communication in diabetic retinopathy.

Sayon Roy1, Dongjoon Kim1, Remington Lim1

  • 1Department of Medicine and Ophthalmology, Boston University School of Medicine, Boston, MA, United States.

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|June 7, 2017
PubMed
Summary

High glucose disrupts retinal cell communication in diabetic retinopathy, leading to vision loss. This review explores how altered connexin expression and gap junction communication impact retinal homeostasis and offers potential solutions.

Keywords:
ConnexinsDiabetic retinopathyGap junctions

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Area of Science:

  • Ophthalmology
  • Cell Biology
  • Diabetic Complications

Background:

  • Diabetic retinopathy (DR) involves high glucose (HG)-induced disruption of retinal homeostasis.
  • HG alters connexin gene expression and gap junction intercellular communication (GJIC) in retinal cells.
  • Disrupted communication contributes to apoptosis and blood-retinal barrier (BRB) breakdown.

Purpose of the Study:

  • To review HG-mediated changes in connexin expression and GJIC in DR.
  • To examine the impact on retinal homeostasis, cell death, and vascular permeability.
  • To discuss potential strategies for restoring homeostasis in DR.

Main Methods:

  • Literature review focusing on HG effects on retinal cells.
  • Analysis of studies on connexin expression and GJIC alterations.
  • Examination of cellular interactions (endothelial cells, pericytes, Müller cells) in DR pathogenesis.

Main Results:

  • HG significantly alters connexin expression and reduces GJIC in retinal vascular and non-vascular cells.
  • Disrupted GJIC exacerbates apoptosis and compromises BRB integrity.
  • Müller cells are adversely affected by HG, impacting retinal function.

Conclusions:

  • Altered cell-cell communication via connexins is a key mechanism in DR pathogenesis.
  • Restoring GJIC and retinal homeostasis is crucial for DR treatment.
  • Targeting connexin pathways may offer therapeutic avenues for diabetic retinopathy.