The present invention provides nanoparticles comprising at least one boronic acid compound and at least one stabilizing agent for the at least one boronic acid compound and/or a reaction product of the at least one boronic acid compound and the at least one stabilizing agent, whereby the nanoparticles have a particle size of about 10 to about 1000 nm. The present invention also provides a pharmaceutical composition comprising these nanoparticles and a method for the preparation of these nanoparticles and the respective pharmaceutical compositions. In addition, the present invention provides nanoparticles and pharmaceutical compositions for the treatment of several disorders, especially multiple myeloma, preferably by parenteral administration.
