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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Downregulation of aquaporin 5 induced by vector-based short hairpin RNA and its effect on MUC5AC gene expression in human airway submucosal gland cells.

The aquaporins (AQPs) are a family of homologous water channels expressed in many epithelial and endothelial cells, however no reliable and non-toxic inhibitors of AQPs have been reported yet. Our researchers have analyzed the changes of AQP5 expression induced by vector-based short hairpin RNA (shRNA) in the human airway submucosal gland cell line (SPC-A1) and observed its regulation on the expression of MUC5AC gene. Localizations of AQP5 and MUC5AC in SPC-A1cells were detected by Immunofluorescence. AQP5 mRNA was significantly reduced by 75.1% one day after transfection with specific shRNA, named shAQP5. However, the significant suppression of AQP5 protein did not appear until day 5 after transfection. MUC5AC mRNA was remarkably increased by 119.9% On day 3 after shAQP5 transfection, while comparable MUC5AC protein changes were not found in SPC-A1 cells with flow cytometry analysis. These results indicate that vector-based shRNA could be used as a potential tool to inhibit the expression of AQP5. This is the first investigation providing evidence demonstrating the regulation of the mucin gene by AQP5 gene silencing.[1]


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