objective(s): there is a rising use of gold nanoparticles (aunps) in goods and in the medical fields but there is concern about the toxicity of them. so in this study spherical aunps with 3 different concentrations were applied for investigating their effects in vivo. materials and methods: 40 male albino mice were randomly divided into sham, control, 25 ppm, 50 ppm, 100 ppm groups and were...