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Abstract

A therapeutic vaccine for tumor immunotherapy is disclosed which comprises absorbable microparticles/nanoparticles capable of delivering immobilized stimulatory/costimulatory signals and releasing necessary cytokines to promote an anti-tumor effect. The microparticles/nanoparticles are formed of an absorbable crystalline polymer, preferably acid-terminated polyglycolide. Other bioactive agents such as tumor specific antigens, DNA or RNA may be immobilized of the surface of the particles.

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First Claim