Djelovanje miozmina na antioksidativne sustave u jetri štakora

Myosmine [3-(1-pyrrolin-2-yl) pyridine] is an alkaloid structurally similar to nicotine, which is known to induce oxidative stress. In this study we investigated the effects of myosmine on enzymatic and nonenzymatic antioxidative defence in rat liver. Wistar rats received a single i.p. injection of 19 mg kg-1 of myosmine and an oral dose of 190 mg kg-1 by gavage. Nicotine was used as a positive control. Through either route of administration, myosmine altered the hepatic function by decreasing the levels of reduced glutathione, superoxide dismutase, and glutathione peroxidase activities on one hand and by increasing malondialdehyde, catalase, and glutathione reductase activity on the other. Compared to control, both routes caused significant lipid peroxidation in the liver and altered hepatic enzymatic and non-enzymatic antioxidative defences. The pro-oxidant effects of myosmine were comparable with those of nicotine.Miozmin (3-(1-pirolin-2-il)piridin) alkaloid je strukturno sličan nikotinu, za koji se zna da potiče oksidativni stres. Istražili smo djelovanje miozmina na enzimske i neenzimske antioksidativne sustave u jetri štakora. Wistar štakori primili su jednokratno pokusni spoj intraperitonealno u dozi od 19 mg kg-1, odnosno na usta u dozi od 190 mg kg-1. Za pozitivnu kontrolu rabili smo nikotin. Nakon primjene, bez obzira na put, zamijećena je promjena u jetrenoj funkciji u obliku pada razina glutationa, aktivnosti superoksid dismutaze i glutation peroksidaze te rasta razina malondialdehida, aktivnosti katalaze i glutation reduktaze. Ovi nalazi upućuju na to da intraperitonealna i oralna primjena miozmina dovode do značajne lipidne peroksidacije u jetrenome tkivu te promjena u enzimskoj i neenzimskoj zaštiti jetre. Prooksidativno djelovanje miozmina pokazalo se sličnim onomu nikotina