Affiliation:
1. The Affiliated Suzhou Hospital of Nanjing Medical University
2. the First Affiliated Hospital of Soochow University
3. Zigong First People's Hospital
Abstract
Abstract
The aim of this study was to explore the role of interleukin (IL)-17/IL-17RC signaling in the function of human alveolar type II epithelial cell-derived cell line of A549 cells. An in vitro LPS-challenged A549 cell model was established to assess the expression of IL-17RC. The effects of IL-17 alone or with LPS in A549 were evaluated by detecting the expression of surfactant protein A (SPA), epithelial sodium channel (ENaC), inflammatory cytokine tumor necrosis factor (TNF)-α and IL-8. Moreover, IL-17RC neutralizing antibody and STAT inhibitor were employed to explore the mechanism underlying IL-17/IL-17RC signaling influencing on A549 cell biological behavior. IL-17RC was expressed on A549 cells and showed a time and LPS dose dependent manner. IL-17 treatment could exert a synergistic effect with LPS, which could result in significantly elevated expression level of TNF-α and IL-8 and reduced expression level of SPA and ENaC. Activation of phosphorylation Akt and STAT were involved in the process of IL-17/IL-17RC signaling effects on A549 cell biological behavior and inhibition the Akt and STAT pathway with AG490 could reverse the effects exerted by IL-17/IL-17RC signaling. The results demonstrated that IL-17/IL-17RC signaling could modulate the biological function of human alveolar type II epithelial cell-derived A549 cells via promoting TNF-α and IL-8 expression, suppressing SPA and ENaC expression, and through activating Akt and STAT signaling pathway.
Publisher
Research Square Platform LLC