Accessory cell function of airway epithelial cells

American Journal of Physiology. Lung Cellular and Molecular Physiology
E OeiK Sperber

Abstract

Accessory cell function of airway epithelial cells. We previously demonstrated that airway epithelial cells (AECs) have many features of accessory cells, including expression of class II molecules CD80 and CD86 and functional Fcgamma receptors. We have extended these studies to show that freshly isolated AECs have mRNA for cathepsins S, V, and H [proteases important in antigen (Ag) presentation], invariant chain, human leukocyte antigen (HLA)-DM-alpha and HLA-DM-beta, and CLIP, an invariant chain breakdown product. A physiologically relevant Ag, ragweed, was colocalized with HLA-DR in AECs, and its uptake was increased by granulocyte-macrophage colony-stimulating factor and IFN-gamma treatments, which had no effect on CD80 and CD86 expression. We demonstrate the presence of other costimulatory molecules, including B7h and B7-H1, on AECs and the increased expression of B7-H1 on AECs after treatment with granulocyte-macrophage colony-stimulating factor and IFN-gamma. Finally, we compared T cell proliferation after allostimulation with AECs and dendritic cells (DCs). The precursor frequency of peripheral blood T cells responding to AECs was 0.264% compared with 0.55% for DCs. DCs stimulated CD45RO(+), CD45RA(+), CCR7(+) and CCR7(-...Continue Reading

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Jun 19, 2014·American Journal of Respiratory and Critical Care Medicine·Sinéad WeldonClifford C Taggart
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Aug 9, 2019·American Journal of Respiratory and Critical Care Medicine·Arunava GhoshRobert Tarran

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