Multi-vesicular liposomes for targeted delivery of drugs and biologics for tissue engineering

A multivesicular liposome composition includes a plurality of multivesicular liposomes. Each multivesicular liposome includes a carrier liposome particle including carrier phospholipid bilayer and having an average diameter less than 1 micron; and at least one sub-chamber liposome nanoparticle including a sub-chamber liposome nanoparticle bilayer and having an average diameter less than about 50 nm. The carrier liposome particle encapsulates the at least one sub-chamber liposome nanoparticle. Characteristically, tail groups of the carrier liposome phospholipids are larger than tail groups phospholipids of the at least one sub-chamber liposome nanoparticle.