Methods for modification of mechanical properties or a shape of a mammalian tissue, excluding scar, blood clot, fat; including a step of contacting the tissue with an isolated eukaryotic endopeptidase in an amount sufficient to cause a modification of mechanical properties of the tissue or its shape, but insufficient to cause degradation of the tissue's into incohesive parts, and to the use of eukaryotic endopeptidases for use in methods for treatment of the mammalian body.