Corneal epithelial cell attachment with endogenous laminin and fibronectin

M. Ohji, L. Mandarino, N. SundarRaj, R. A. Thoft

    Research output: Contribution to journalArticle

    44 Scopus citations

    Abstract

    Purpose. To evaluate the role of endogenously produced laminin and fibronectin as well as the effect of exogenous laminin and fibronectin in the attachment of human corneal epithelial cells in vitro. Methods. Primary cultured human corneal epithelial cells labeled with 3H-thymidine were seeded onto plates coated with laminin or fibronectin or onto uncoated bacteriologic plates. Attachment of cells was measured in the presence or absence of antisera against laminin or fibronectin, by counting radioactivity. Results. Human corneal epithelial cells attached to plates coated with human laminin or human fibronectin in a dose-dependent manner, with 69% and 50% of cells attached to the wells coated with 40 μg/ml of laminin and fibronectin, respectively (P < 0.001). The percentage of attachment to uncoated bacteriologic plates increased from 1.2% at 45 min of incubation to 6.7% at 90 min, 22.2% at 3 hr, and 40.1% at 6 hr of incubation. Cycloheximide, a protein synthesis inhibitor, completely inhibited cell attachment. Rabbit antiserum against human fibronectin reduced cell attachment to the uncoated plates to 67% of the control value (P < 0.01), whereas rabbit antiserum against human laminin decreased the attachment to 52% of the control (P < 0.01). A combination of these two antisera reduced cell attachment to 46% of the control (P < 0.01). Conclusions. Endogenous laminin and fibronectin as well as exogenous laminin and fibronectin play significant roles in the attachment of human corneal epithelial cells in culture.

    Original languageEnglish (US)
    Pages (from-to)2487-2492
    Number of pages6
    JournalInvestigative Ophthalmology and Visual Science
    Volume34
    Issue number8
    StatePublished - 1993

    Keywords

    • attachment
    • corneal epithelium
    • endogenous
    • fibronectin
    • laminin

    ASJC Scopus subject areas

    • Ophthalmology
    • Sensory Systems
    • Cellular and Molecular Neuroscience

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    Ohji, M., Mandarino, L., SundarRaj, N., & Thoft, R. A. (1993). Corneal epithelial cell attachment with endogenous laminin and fibronectin. Investigative Ophthalmology and Visual Science, 34(8), 2487-2492.