Ionomycin calcium salt

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Background

Ionomycin calcium salt is a calcium ionophore [1]. Ca2+ ionophore acts as a Ca2+ ionophore, allowing Ca2+ to cross cell membranes. Ionomycin calcium salt is a calcium ionophore. In cultured chicken pectoralis muscle, ionomycin (10-6-10-5 M) selectively increased the incorporation of methionine into two proteins. Ionomycin increased influx of extracellular Ca2+ and increased Ca2+ concentration in the cytoplasm, which then regulated the synthesis of muscle proteins [2]. In rat parotid gland, ionomycin increased 86Rb efflux, 22Na uptake and 3H-protein secretion, which were dependent on increasing cytosolic Ca2+. In parotid cells, ionomycin released the receptor-regulated cellular Ca2+ pool [3]. In human bladder cancer cells HT1376, ionomycin significantly inhibited cell growth in a time- and dose-dependent way and induced apoptotic DNA degradation. Also, ionomycin reduced the ratios of Bcl-2 to Bax mRNA and protein [4]. In athymic nude mice bearing HT1376 tumors, ionomycin significantly inhibited tumor growth and reduced the tumorigenicity [4].

[1]. Liu C, Hermann TE. Characterization of ionomycin as a calcium ionophore. J Biol Chem, 1978, 253(17): 5892-5894.
[2]. Roufa D, Wu FS, Martonosi AN. The effect of Ca2+ ionophores upon the synthesis of proteins in cultured skeletal muscle. Biochim Biophys Acta, 1981, 674(2): 225-237.
[3]. Poggioli J, Leslie BA, McKinney JS, et al. Actions of ionomycin in rat parotid gland. J Pharmacol Exp Ther, 1982, 221(1): 247-253.
[4]. Miyake H, Hara I, Yamanaka K, et al. Calcium ionophore, ionomycin inhibits growth of human bladder cancer cells both in vitro and in vivo with alteration of Bcl-2 and Bax expression levels. J Urol, 1999, 162(3 Pt 1): 916-921.