In this study, the insulin mimetic activity of ammonium decavanadate (DV) (in concentration 0.1 and 1.0 mM) dissolved in saline (0.9 % w/v of NaCl) or dimethyl sulfoxide, DMSO (2% v/v) was evaluated by means of in vitro measurements of the glucose uptake (GU) and inhibition of free fatty acids release (IFFAR) using isolated epinephrine-pretreated white adipocytes from Wistar rats. Our data showed strong insulin mimetic effect of DV (> 80 %) in both concentration and independently of the solvent were used. Having in mind satisfactory pharmacological effect of DMSO as well as its capability of penetration enhancer it would be reasonable to continue in vivo testing of dose-dependent insulin mimetic effect of decavanadate in DMSO. It is also necessary to examine toxicity of decavanadate in order to estimate its therapeutic index as potential antidiabetic agent.Ispitana je insulin mimetička aktivnost amonijum dekavanadata (DV), in vitro merenjem preuzimanja glukoze (GU) i merenjem inhibicije oslobađanja slobodnih masnih kiselina (IFFAR) na modelu izolovanih belih adipocita Wistar pacova. Ovaj biološki efekat dekavanadata (u koncentracijama od 0,1 i 1,0 mM) koji je rastvoren u fiziološkom rastvoru (0.9 % NaCl) ili u dimetil sulfoksidu (2% DMSO) ispitan je na adipocitima koji su prethodno tretirani adrenalinom. Prema dobijenim rezultatima dekavanadat pokazuje snažan insulin mimetički efekat (> 80 %) i to u obe koncentracije i nezavisno od vrste rastvarača. Na osnovu ovog in vitro eksperimenta može se zaključiti da bi bilo opravdano dozno-zavisno ispitivanje insulin mimetičkog efekta dekavanadata u DMSO-u kao rastvaraču u in vivo uslovima. Takođe, neophodno je ispitati i toksičnost ovog jedinjenja kako bi se što bezbednije iskoristio njegov insulin mimetički efekat
