Effect of Cationic Antimicrobial Protein CAP37 on Cytokine Profile during Corneal Wound Healing

Authors

  • Anne Kasus-Jacobi Department of Pharmaceutical Sciences; Oklahoma Center for Neuroscience and Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
  • Gina L. Griffith U.S. Army Institute of Surgical Research, Sensory Trauma, Fort Sam Houston, Texas 78234-7767, USA
  • Megan Lerner Department of Surgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
  • H. Anne Pereira Department of Pharmaceutical Sciences; Oklahoma Center for Neuroscience; Department of Pathology and Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104

DOI:

https://doi.org/10.12974/2309-6136.2017.05.04

Keywords:

Corneal abrasion, corneal re-epithelialization, neutrophil, monocyte, macrophage, natural killer cells, immunohistochemistry, multiplex analysis, interleukin, chemokine.

Abstract

The cationic antimicrobial protein of 37 kDa (CAP37) mediates proliferation, migration, and adhesion of human corneal epithelial cells and promotes corneal re-epithelialization in mouse. The purpose of this study was to investigate the cytokine profile following abrasion of the corneal epithelium, and to identify the cytokines modulated by topical treatment with CAP37 to determine the mechanism by which CAP37 contributes to the recruitment of inflammatory cells and healing of the cornea.

The corneal epithelium in mouse eyes was removed and wounds were treated with a saline vehicle or human recombinant CAP37. Wounds were visualized with fluoresce in staining at 0, 16, 24 and 48 h. Mouse corneas were excised at 0, 6, 16, 24 and 48 h post corneal abrasion. The excised corneas were analyzed by immunohistochemistry for re-epithelialization and infiltration of inflammatory cells while the expression profiles of thirty-two cytokines were investigated by multiplex analysis.

Results corroborating previous studies showed accelerated wound closure in corneas treated with CAP37 compared to those treated with the saline vehicle. Immunohistochemistry revealed less neutrophil infiltration in CAP37-treated corneas when compared to controls at 24 h. By 48 h post-wounding, histological analysis revealed more staining for neutrophils than the staining observed in the controls. Modulation of cytokine expression occurred for the majority of the cytokines tested at the time of corneal abrasion, during re-epithelialization, and/or by CAP37 treatment. Cytokines monocyte chemoattractant protein-1 (MCP-1) and regulated on activation, normal T cell expressed and secreted (RANTES) were induced during re-epithelialization, at the early 16 h time point. Interleukin 6 (IL-6), leukemia inhibitory factor (LIF), granulocyte colony-stimulating factor (G-CSF), IL-12p70, macrophage inflammatory protein 1 beta (MIP-1β), and interferon gamma-induced protein 10 (IP-10) were induced at 24 h and unchanged during CAP37 treatment. By contrast, IL-15, monokine induced by gamma interferon (MIG), keratinocyte-derived cytokine (KC), tumor necrosis factor alpha (TNF-α), MIP-1α, IL-1β, and macrophage colony-stimulating factor (M-CSF) were modulated by CAP37 treatment. In general, CAP37 appeared to decrease pro-inflammatory cytokines at 24 h and increase them at 48 h when compared to the control group.

These data demonstrate that CAP37 modulates the production of cytokines in the cornea and suggest that limiting the number of neutrophils recruited during the early inflammatory phase may support corneal re-epithelialization. 

References

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Published

2017-02-27

How to Cite

Kasus-Jacobi, A. ., Griffith, G. L., Lerner, M., & Pereira, H. A. (2017). Effect of Cationic Antimicrobial Protein CAP37 on Cytokine Profile during Corneal Wound Healing. Journal of Ocular Diseases and Therapeutics, 5, 19–27. https://doi.org/10.12974/2309-6136.2017.05.04

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