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Title: Ion selectivity of Ba2+ inward current oscillations in ras-transformed fibroblasts that elicit cytoplasmic Ca2+ oscillations by bradykinin. Author: Higashida H, Shahidullah M, Hoshi N, Noda M, Hashii M, Zhong ZG, Nozawa Y. Journal: Biochem Biophys Res Commun; 1992 May 29; 185(1):162-6. PubMed ID: 1599453. Abstract: Ion selectivity of divalent cations on Ba2+ inward current oscillations was examined by voltage-clamp recording in v-Ki-ras-transformed NIH/3T3 (DT) fibroblasts where repetitive transient increases in cytoplasmic Ca2+ concentration were evoked by bradykinin. Application of bradykinin onto DT cells in 50 mM Ba2+ solution initiated Ba2+ inward current oscillations. The inward currents were inhibited in equimolar Sr2+ or Ca2+ solutions. Ba2+ current oscillations were dependent upon extracellular Ba2+ concentration. The results suggest that inward current oscillations are highly selective to Ba2+.[Abstract] [Full Text] [Related] [New Search]