Calcimycin (hemicalcium salt)

Calcimycin hemicalcium salt (A-23187 hemicalcium salt) is an antibiotic and a unique divalent cation ionophore (like calcium and magnesium). Calcimycin hemicalcium salt induces Ca2+-dependent cell death by increasing intracellular calcium concentration. Calcimycin hemicalcium salt inhibits the growth of Gram-positive bacteria and some fungi. Calcimycin hemicalcium salt also inhibits the activity of ATPase and uncouples oxidative phosphorylation (OXPHOS) of mammalian cells. Calcimycin hemicalcium salt induces apoptosis[1][2][3][4].

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[1]Wu Q, et al. Characterization of the biosynthesis gene cluster for the pyrrole polyether antibiotic calcimycin(A23187) in Streptomyces chartreusis NRRL 3882. Antimicrob Agents Chemother. 2011 Mar;55(3):974-82.|[2]Elliott JI, et al. IKCa1 activity is required for cell shrinkage, phosphatidylserine translocation and death in Tlymphocyte apoptosis. EMBO Rep. 2003 Feb;4(2):189-94.|[3]Engedal N, et al. Modulation of intracellular calcium homeostasis blocks autophagosome formation. Autophagy. 2013 Oct;9(10):1475-90.|[4]Mawatwal S, et al. Calcimycin mediates mycobacterial killing by inducing intracellular calcium-regulated autophagy in a P2RX7 dependent manner. Biochim Biophys Acta Gen Subj. 2017 Dec;1861(12):3190-3200.|[5]Wang JP, et al. Effect of norathyriol, isolated from Tripterospermum lanceolatum, on A23187-induced pleurisy and analgesia in mice. Naunyn Schmiedebergs Arch Pharmacol. 1994 Jul;350(1):90-5.