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Functional interaction between TRP4 and CFTR in mouse aorta endothelial cells.


ABSTRACT: BACKGROUND:This study describes the functional interaction between the putative Ca2+ channel TRP4 and the cystic fibrosis transmembrane conductance regulator, CFTR, in mouse aorta endothelium (MAEC). RESULTS:MAEC cells express CFTR transcripts as shown by RT-PCR analysis. Application of a phosphorylating cocktail activated a Cl- current with characteristics similar to those of CFTR mediated currents in other cells types (slow activation by cAMP, absence of rectification, block by glibenclamide). The current is present in trp4 +/+ MAEC, but not in trp4 -/- cells, although the expression of CFTR seems unchanged in the trp4 deficient cells as judged from RT-PCR analysis. CONCLUSIONS:It is concluded that TRP4 is necessary for CFTR activation in endothelium, possibly by providing a scaffold for the formation of functional CFTR channels.

SUBMITTER: Wei L 

PROVIDER: S-EPMC32182 | biostudies-literature | 2001

REPOSITORIES: biostudies-literature

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Functional interaction between TRP4 and CFTR in mouse aorta endothelial cells.

Wei L L   Freichel M M   Jaspers M M   Cuppens H H   Cassiman J J JJ   Droogmans G G   Flockerzi V V   Nilius B B  

BMC physiology 20010515


<h4>Background</h4>This study describes the functional interaction between the putative Ca2+ channel TRP4 and the cystic fibrosis transmembrane conductance regulator, CFTR, in mouse aorta endothelium (MAEC).<h4>Results</h4>MAEC cells express CFTR transcripts as shown by RT-PCR analysis. Application of a phosphorylating cocktail activated a Cl- current with characteristics similar to those of CFTR mediated currents in other cells types (slow activation by cAMP, absence of rectification, block by  ...[more]

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