@article{oai:nagoya.repo.nii.ac.jp:00005956, author = {Yasui, Kenji and Hojo, Mayumi and Kodama, Itsuo}, journal = {Environmental Medicine : annual report of the Research Institute of Environmental Medicine, Nagoya University}, month = {Dec}, note = {ATP-sensitive K^+(K_) channels is expressed in early-stage embryonic heart as well as at the adult stage. K_ channels are composed of pore-forming (Kir) and regulatory sulfonylurea receptor (SUR) subunits. We studied mRNA expression of Kir6.1, Kir6.2, SUR1, SUR2A, SUR2B and SUR2C mRNAs encoding for K_(ATP) channels in cardiac ventricles of embryonic (9.5 days postcoitum, dpc) and adult mice using RT-PCR. 30 cycles of PCR revealed mRNA expression of all genes at the adult-stage. At 9.5 dpc, Kir6.1 mRNA was undetectable, whereas mRNAs of other subunits were detected. At 9.5 dpc, SUR2A expression was higher than SUR1 and SUR2B. In the adulthood, mRNAs of all subunits were detected. This finding suggests that Kir6.2 is dominant pore-forming subunit from an early embryonic stage. The developmental changes of transcriptional profile of K_(ATP) channels may underlie the different functional properties of the channel in pre-and post-natal period., 国立情報学研究所で電子化したコンテンツを使用している。}, pages = {35--36}, title = {The Difference of mRNA Expression of ATP-Sensitive K^+ Channel Subunits in Embryonic and Adult Mouse Heart}, volume = {47}, year = {2003} }