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  11. Il-8 Promotes Lens Capsular Residual Cells Migration By Down-regulates Expression Of E-cadherin And Zo-1 Via The Cxcr1/2-nf-κb-rhoa Signal Pathway

IL-8 promotes lens capsular residual cells migration by down-regulates expression of E-cadherin and ZO-1 via the CXCR1/2-NF-κB-RhoA signal pathway

Wei Si1, Jingjing Liu1, Yuxuan Wang2

  • 1Laboratory of Ophthalmology and Vision Science, Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.

International Immunopharmacology
|September 8, 2024

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Assessment of Lymphocyte Migration in an Ex Vivo Transmigration System
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Author Spotlight: Unraveling the Molecular Mechanisms in PCO and Fibrosis Following Cataract Surgery
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View abstract on PubMed

Summary
This summary is machine-generated.

Interleukin-8 (IL-8) drives posterior capsular opacification by increasing epithelial cell migration and reducing cell junctions. Blocking IL-8 signaling may prevent this common cataract surgery complication.

Area of Science:

  • Ophthalmology
  • Cell Biology
  • Immunology

Background:

  • Posterior capsular opacification (PCO) is a frequent complication after cataract surgery.
  • PCO involves residual lens epithelial cell (LEC) proliferation, migration, and fibrosis, influenced by inflammatory cytokines.
  • The specific role of interleukin-8 (IL-8) in LEC behavior during PCO remains unclear.

Purpose of the Study:

  • To investigate the role of IL-8 in the pathogenesis of PCO.
  • To elucidate the molecular mechanisms by which IL-8 affects LECs.
  • To evaluate IL-8 as a potential therapeutic target for PCO.

Main Methods:

  • Collected aqueous humor and anterior capsule samples from cataract surgery patients.
  • Cultured rat and pig capsular bags in vitro.
Keywords:
CXCR 1/2E-cadherinInterleukin-8Lens epithelial cells

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  • Quantified protein and mRNA expression using immunoblot and qPCR.
  • Assessed LEC migration using transwell assays.

    • Main Results:

    • IL-8 is an early inflammatory factor secreted by residual LECs.
    • IL-8 levels positively correlated with LEC migration, an effect inhibited by the IL-8 receptor antagonist Reparaxin (CXCR1/2 blocker).
    • IL-8 downregulated tight-junction protein ZO-1 and cell-adhesion protein E-cadherin, while upregulating RhoA expression and activity, promoting cell migration via the CXCR1/2-NF-κB-RhoA pathway.

    Conclusions:

    • Early upregulation of IL-8 contributes to PCO development.
    • IL-8 promotes LEC migration and disrupts cell-cell junctions through the CXCR1/2-NF-κB-RhoA signaling pathway.
    • IL-8 represents a potential therapeutic target for preventing PCO.
    PCO
    RhoA
    ZO-1