Cytokine deposition alters leukocyte morphology and initial recruitment of monocytes and γδT cells after corneal injury.

Published online

Journal Article

PURPOSE: An in vivo mouse model reproducibly induces recurrent epithelial erosions in wild-type mice spontaneously 2 weeks after a single 1.5-mm corneal debridement wound made with a dulled blade. When 1.5-mm wounds are made by a rotating burr so that the corneal epithelial basement membrane is removed, corneas heal without developing erosions. Here, we characterize differences in cytokine deposition and changes in leukocytes between 0 and 6 hours after dulled-blade and rotating-burr wounding. METHODS: BALB/c mice were used to study 1.5-mm corneal wounds made using a dulled blade or a rotating burr. Mice were studied immediately after wounding (0 hour) and at 6 hours in vivo and in vitro in organ culture. Corneas, corneal extracts, and collagenase digests from naïve and wounded mice were used for three-dimensional (3D) confocal imaging, cytokine arrays, and flow cytometry. RESULTS: Confocal imaging showed CD45, a protein derived from leukocytes, accumulates at the wound edge by 3 and 6 hours after wounding in vivo but not in vitro with more CD45 accumulating after dulled-blade compared with rotating-burr wounds. Morphologic changes occurred in CD45+ leukocytes and higher levels for several cytokines were detected in the stromal wound bed within minutes following dulled-blade wounds. Flow cytometry showed significantly more monocytes (CD45+/CD11b+/Ly6C+) and γδT cells (CD45+/GL3+) recruited into the corneas of mice with dulled-blade wounds by 6 hours. CONCLUSIONS: Differences in cytokine-driven leukocyte responses are seen after dulled-blade debridement compared with rotating-burr injury.

Full Text

Duke Authors

Cited Authors

  • Pal-Ghosh, S; Pajoohesh-Ganji, A; Menko, AS; Oh, H-Y; Tadvalkar, G; Saban, DR; Stepp, MA

Published Date

  • April 28, 2014

Published In

Volume / Issue

  • 55 / 4

Start / End Page

  • 2757 - 2765

PubMed ID

  • 24677104

Pubmed Central ID

  • 24677104

Electronic International Standard Serial Number (EISSN)

  • 1552-5783

Digital Object Identifier (DOI)

  • 10.1167/iovs.13-13557

Language

  • eng

Conference Location

  • United States