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

Molecular basis of voltage-dependent delayed rectifier K+ channels in smooth muscle cells from rat tail artery.

The molecular basis of voltage-dependent K+ (Kv) current in smooth muscle cells (SMCs) from rat tail artery was investigated by screening transcriptional expression of 15 Kv channel alpha-subunits and 3 Kv beta-subunits using RT-PCR technique. Among Kv genes that encode delayed rectifier Kv currents, mRNAs of Kv1.2, Kv1.3, Kv1.5, Kv2.1, Kv2.2, and Kv3.2 were expressed, but those of Kv1.1, Kv1.6, and Kv3.1 were not detected. The transient outward Kv current-encoding genes Kv1.4, Kv3.3, Kv3.4, Kv4.1- Kv4.3 as well as Kvbeta1, Kvbeta2, and Kvbeta3 were also expressed at mRNA level. Western blot study demonstrated the presence of Kv1.2, Kv1.3, Kv1.5, and Kv2.1, but not Kv3.2 proteins, in tail artery tissue. Immunocytochemistry study confirmed the presence of Kv1.2, Kv1.3, Kv1.5, and Kv2.1 channel proteins in primary cultured single SMCs. Our results represent the first systematic characterization of Kv gene expression in rat tail artery SMCs.[1]


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