Mesaconitine is the main active component of genus aconitum plants.IC50 value:Target: in vitro: In HUVECs, 30 microM mesaconitine increased the [Ca(2+)](i) level in the presence of extracellular CaCl(2) and NaCl, and the response was inhibited by KBR7943. Mesaconitine increased intracellular Na(+) concentration level in HUVECs. The [Ca(2+)](i) response by mesaconitine was inhibited by 100 microM D-tubocurarine [1]. Mesaconitine at 30 microM inhibited 3 microM phenylephrine-induced contraction in the endothelium-intact, but not endothelium-denuded, aortic rings [2]. MA promoted the alpha-MT-induced decrease in NE levels in hippocampus, medulla oblongata plus pons and spinal cord [3].
References:
[1]. Ogura J, et al. Mesaconitine-induced relaxation in rat aorta: role of Na+/Ca2+ exchangers in endothelial cells. Eur J Pharmacol. 2004 Jan 12;483(2-3):139-46.
[2]. Mitamura M, et al. Mesaconitine-induced relaxation in rat aorta: involvement of Ca2+ influx and nitric-oxide synthase in the endothelium. Eur J Pharmacol. 2002 Feb 2;436(3):217-25.
[3]. Murayama M, et al. Mechanism of analgesic action of mesaconitine. I. Relationship between analgesic effect and central monoamines or opiate receptors. Eur J Pharmacol. 1984 May 18;101(1-2):29-36.