Abstract
γ-secretase inhibitor has been shown to promote intestinal goblet cell differentiation. We now demonstrated that the in vitro addition of γ-secretase inhibitor in the culture of human conjunctival epithelial cells significantly promoted the differentiation of conjunctival goblet cells with typical droplet-like phenotype, positive periodic acid-Schiff and goblet cell-specific Muc5Ac, cytokeratin 7 and Helix pomatia agglutinin lectin staining. Moreover, topical application of γ-secretase inhibitor promoted the differentiation of mouse conjunctival goblet cells in vivo. Furthermore, the expression of Notch target gene HES-1 was down-regulated during the differentiation of conjunctival goblet cells. In addition, we found that the recombinant conjunctival epithelium on amniotic membrane showed less goblet cell density and abnormal location when compared with normal conjunctival epithelium, which were improved by the addition of γ-secretase inhibitor in the final induction.
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