Colloidal suspension of submicronic particles for carrying active principles and their mode of preparation

摘要

The invention concerns a suspension of biocompatible particles for carrying active principles. Said carrier particles are based on a double-block hydrophilic neutral polyaminoacid/hydrophobic neutral polyaminoacid copolymer. Said hydrophilic neutral polyaminoacid/hydrophobic neutral polyaminoacid particles are capable of combining in colloidal suspension in non-dissolved state, at least an active principle and of releasing same, in particular in vivo, in prolonged and/or delayed delivery. The invention also concerns a powdery solid from which are derived the carrier particles and the preparation of said solid and of said suspension of active principle based on hydrophilic neutral polyaminoacids/hydrophobic neutral polyaminoacids. Said carrier particles form spontaneously and in the absence of surfactants or organic solvents, stable aqueous suspensions. The invention also concerns the carrier particles in dry form, the method for preparing them, and pharmaceutical compositions (in dry form or suspension) comprising said carrier particles associated with an active principle.