Formation of paramagnetic nitrosyl complexes of non heme iron in animals with participation of nitric oxide from exogenous and endogenous sources

: It was found that thiosulfate has a stabilizing effect on exogenous and endogenous dinitrosyl-iron complexes in mice treated with bacterial lipopolysaccharide. It was assumed that thiosulfate protects dinitrosyl-iron complexes from the destructive influence of superoxide and peroxinitrite whose enhanced synthesis, together with the synthesis of nitric oxide, is initiated in mice by the lipopolysaccharide. For the first time, the formation of dinitrosyl-iron complexes was demonstrated, which occurs with the participation of nitric oxide generated enzymatically via the L-arginine-dependent pathway. The injection of exogenous dinitrosyl-iron complexes with thiosulfate, which, together with diethyldithiocarbamate, provide the formation of exogenous mononitrosyl iron-diethyldithiocarbamate complexes, made it possible to use the ABC method, which markedly enhances the efficiency of scavenging of endogenous nitric oxide in mice treated with lipopolysaccharides.