[Study of biocompatibility of polybutylcyanoacrylate nanoparticles].

To evaluate the biocompatibility of polybutylcyanoacrylate nanoparticles (PBCA-NP) manufactured by emulsion polymerization technique. MTT assay was performed for evaluation of the cytotoxicity of PBCA-NP (e.g. cell proliferation and hemolytic test) experiments of long-term subcutaneous implantation and implantation in the muscular tissues of PBCA-NP was conducted in rabbits to observe the inflammatory reactions due to the implantation. No obvious cytotoxicity or hemolytic reactions were observed (with the hemolytic rate at different concentrations of PBCA-NP(5%). Three months after PBCA-NP implantation, obvious lymphocyte infiltration was not observed in the tissues around the implants which underwent gradual degradation. PBCA-NP possesses good biocompatibility.