Imisopasem manganese (M40403)

Animal experiment:

Rats: Male Sprague-Dawley rats are used in the study. M40403 (5-20 mg kg-1), or an equivalent volume (0.3 mL) of vehicle (26 mm sodium bicarbonate buffer, pH 8.1-8.3), is injected intraperitoneally (i.p.) 15 min before carrageenan. At 4 h after the injection of carrageenan, the animals are killed by inhalation of CO2[1]. Mice: 30 mg dry powder M40403 is dissolved in 6.0 ml SBC adjusted to pH 8.3 with 1 M NaOH. This stock solution is diluted to 1.25 mg/mL in SBC. Two experimental models are tested. In one, the dose of IR is held constant at 8.5 Gy total body irradiation (TBI). The mice are injected i.p. with a single dose of 40 mg/kg, 30 mg/kg, 20 mg/kg or 10 mg/kg M40403. Thirty minutes later the mice receives 8.5 Gy total body irradiation (TBI). Control animals receives 0.1 ml of SBC buffer prior to TBI. In the other model, groups of 20 mice receives either 6.5 or 7.5 Gy TBI. One half of each group is treated with 2.0 mg/kg M40403 i.p. and the other with SBC 30 min before TBI. All are followed for survival[2].

References:

[1]. Salvemini D, et al. Pharmacological manipulation of the inflammatory cascade by the superoxide dismutase mimetic,M40403. Br J Pharmacol. 2001 Feb;132(4):815-27.
[2]. Masini E, et al. Protective effects of M40403, a selective superoxide dismutase mimetic, in myocardial ischaemia and reperfusion injury in vivo. Br J Pharmacol. 2002 Jul;136(6):905-17.