Biodegradable polymer-ligand conjugates and their uses in isolation of cellular subpolulations and in cryopreservation, culture and transplantation of cells
申请人:Xu S. L. Arron
公开号:US20050100877A1
公开(公告)日:2005-05-12
The invention discloses a biodegradable particle-cell composition having at least one biodegradable particle, at least one receptive group covalently linked thereto, and a cell anchored thereto. The particle can be polylactide, a polylactide-lysine copolymer, polylactide-lysine-polyethylene glycol copolymer, starch, or collagen. The receptive group can be an antibody, a fragment of an antibody, an avidin, a streptavidin, or a biotin moiety. Moreover, the particle can also have extracellular matrix components other than collagen. The particle-cell compositions can be used for selection of cells from a population, for cell culture of anchorage-dependent cells, for cryopreservation of anchorage-dependent cells, and for transplantation as a cell therapy.
本发明公开了一种可生物降解的微粒-细胞组合物,该组合物具有至少一种可生物降解的微粒、至少一种与其共价连接的接受基团以及固定在其上的细胞。颗粒可以是聚乳酸、聚乳酸-赖氨酸共聚物、聚乳酸-赖氨酸-聚乙二醇共聚物、淀粉或胶原蛋白。受体基团可以是抗体、抗体片段、阿维丁、链霉亲和素或生物素分子。此外,颗粒还可以具有胶原蛋白以外的细胞外基质成分。颗粒-细胞组合物可用于从群体中筛选细胞、锚定依赖性细胞的细胞培养、锚定依赖性细胞的冷冻保存以及作为细胞疗法的移植。