Study on preparation and controlled release in vitro of bergenin-amino polylactic acid polymer

The efficacy of traditional tablets, drop pills and soft capsules of bergenin is far lower than expected. Therefore, bergenin was modified in this paper to connect with amino polylactic acid, a kind of biodegradable material, for chemical immobilization. The bergenin-amino PLA thus obtained was controllable with small molecular weight and excellent thermal stability. Its release in vitro could be extended with the increase in molecular weight. According to tests of biological compatibility and anti-tumor in vitro, bergenin-amino PLA at a proportion of 1 to 100 was characterized by better biological compatibility and lower cytotoxicity than control group at a concentration of 0.4 μ g/m L. The chemical immobilization of bergenin not only provides patients with an excellent way of drug administration but lays a good foundation for sustained drug release.