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Spatiotemporal Control of Protein Activity through Optogenetic Allosteric Regulation
08:00

Spatiotemporal Control of Protein Activity through Optogenetic Allosteric Regulation

Published on: October 4, 2024

Specific involvement of SRC family kinase activation in the pathogenesis of retinal neovascularization

Xiang Q Werdich1, John S Penn

  • 1Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, 8000 Medical Center East, Nashville, TN 37232, USA.

Investigative Ophthalmology & Visual Science
|October 27, 2006
PubMed
Abstract

Insights

Src family kinases (SFKs) are crucial for vascular endothelial growth factor (VEGF)-mediated retinal angiogenesis. Inhibiting SFKs significantly reduced pathologic retinal neovascularization in a retinopathy of prematurity model.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Ophthalmology

Background:

  • Src family kinases (SFKs) are nonreceptor tyrosine kinases involved in signal transduction.
  • SFKs link extracellular signals to intracellular pathways, influencing cell behavior.
  • Retinal angiogenesis, the formation of new blood vessels in the retina, is critical in development and disease.

Purpose of the Study:

  • To investigate the role of SFKs in vascular endothelial growth factor (VEGF)-mediated retinal angiogenesis.
  • To understand how SFKs regulate VEGF expression and signaling in retinal cells.

Main Methods:

  • In vitro studies using rat retinal Müller cells and bovine/human retinal microvascular endothelial cells (RMECs).
  • In vivo studies utilizing a rat model of retinopathy of prematurity (ROP).
  • Assessment of SFK activation (Tyr416 phosphorylation) and VEGF levels.
  • Pharmacological inhibition of SFKs using PP2.

Main Results:

  • SFKs were essential for hypoxia-induced VEGF expression in Müller cells and VEGF signaling in RMECs.
  • Increased SFK Tyr416 phosphorylation and VEGF levels were observed in ROP retinas, primarily from Müller cells.
  • SFK inhibition with PP2 significantly reduced retinal VEGF and retinopathy in the ROP model.

Conclusions:

  • SFK activation, potentially via Tyr416 phosphorylation, plays a significant role in the pathogenesis of retinal neovascularization.
  • SFKs are important regulators of abnormal retinal angiogenesis, suggesting them as therapeutic targets.

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