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Antagonistic Regulation of CFTR Cell Surface Expression by Protein Kinases WNK4...
Mendes, A.I.; Matos, P.; Amaral, M.D.; Jordan, P.Members of the WNK (with no lysine (K)) subfamily of protein kinases regulate various ion channels involved in sodium, potassium and chloride homeostasis by either inducing their phosphorylation or regulating the number of channel proteins expressed at the cell surface. Here, we describe that WNK4 promotes the cell surface expression of the cystic fibrosis transmembrane conductance regulator (CFTR) in mammalian...
Contribution of casein kinase 2 and spleen tyrosine kinase to CFTR trafficking ...
Luz, S.; Kongsuphol, P.; Mendes, A.I.; Romeiras, F.; Sousa, M.; Schreiber, R.; Matos, P.; Jordan, P.; Metha, A.; Amaral, M.D.; Kunzelmann, K.Previously, the pleiotropic "master kinase" casein kinase 2 (CK2) was shown to interact with CFTR, the protein responsible for cystic fibrosis (CF). Moreover, CK2 inhibition abolished CFTR conductance in cell-attached membrane patches, native epithelial ducts, and Xenopus oocytes. CFTR possesses two CK2 phosphorylation sites (S422 and T1471), with unclear impact on its processing and trafficking. Here, we inves...
Ionic transport in tall columnar epithelial (TCE) cells obtained by nasal brush...
Maurício, Ana C; Penque, D; Amaral, M D; Ferreira, K TTall columnar epithelial (TCE) cells can be obtained by a non-invasive procedure through brushing the inferior turbinate and the adjacent lateral nasal wall. Here, we present results from the functional study of epithelial cells, thus obtained by using the patch-clamp technique. By patch-clamping the sub-apical region of TCE cells, we were able to identify at least three different groups of Cl- channels, namely...
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