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    • 1. 发明授权
    • Implantable delivery system for biological factors
    • 生物因子植入式输送系统
    • US5011472A
    • 1991-04-30
    • US240939
    • 1988-10-06
    • Patrick AebischerPierre M. GallettiGeorge PanolLuigi Miracoli
    • Patrick AebischerPierre M. GallettiGeorge PanolLuigi Miracoli
    • A61F2/02A61M5/142
    • A61M5/14276A61F2/022A61M2205/3523
    • Devices and methods are disclosed to provide hybrid, modular systems for the constitutive delivery of appropriate dosages of active factor to a subject and, in some instances, to specific anatomical regions of the subject. The systems include a cell reservoir containing living cells capable of secreting an active agent, which is preferably adapted for implantation within the body of the subject and further includes at least one semipermeable membrane, whereby the transplanted cells can be nourished by nutrients transported across the membrane while at the same time protected from immunological, bacterial, and viral assault. The systems further include a pumping means, which can be implantable or extracorporeal, for drawing a body fluid from the subject into the cell reservoir and for actively transporting the secreted biological factors from the cell reservoir to a selected region of the subject.
    • 公开了装置和方法以提供混合模块化系统,用于将主动因子的合适剂量的组成型递送给受试者,并且在某些情况下提供给对象的特定解剖区域。 该系统包括含有能够分泌活性剂的活细胞的细胞储库,其优选适于植入受试者的身体内并且还包括至少一种半透膜,由此可以通过跨膜运送的营养物滋养移植的细胞 同时保护免受免疫,细菌和病毒攻击。 所述系统还包括可植入或体外的抽吸装置,用于将体液从受试者吸入细胞储存器中并用于将分泌的生物因子从细胞储存器积极输送到受试者的选定区域。
    • 6. 发明授权
    • Chitosan core matrix containing cells encapsulated in a thermoplastic
semipermeable membrane
    • 壳聚糖核心基质含有包封在热塑性半透膜中的细胞
    • US6140089A
    • 2000-10-31
    • US251004
    • 1999-02-16
    • Patrick AebischerBeth A. Zielinski
    • Patrick AebischerBeth A. Zielinski
    • A61K35/12A61L27/20A61L27/38C12N5/077C12N5/0793C12N11/10C12N11/04C12N5/00
    • C12N5/0012A61L27/20A61L27/38A61L27/3804C12N5/0618C12N5/0619A61K2035/128A61K35/12
    • Encapsulated viable cells for implanting are prepared having cells dispersed in a particulate, essentially non cross-linked chitosan core matrix that is enclosed within a semipermeable membrane. The cells are entrapped between chitosan particles of the core matrix and there is essentially no interfacial cross-linking between the core matrix and the membrane. The core matrix provides a physical support for the cells such that the cells are evenly dispersed throughout the core matrix so as to allow their maintenance, growth, proliferation and differentiation. The encapsulated cells may be prepared by mixing viable cells with a solution of chitosan, encapsulating the resultant mixture in a thermoplastic semipermeable membrane, and causing the chitosan to precipitate such as by changing the pH to form the core matrix. Alternatively, the chitosan in solution is precipitated to form the core matrix containing cells, and the core matrix is encapsulated in a semipermeable membrane. Cells encapsulated include neurosecretory cell lines, .beta.-cell-derived cells lines, fibroblasts, myocytes and glial cells.
    • 制备用于植入的包封的活细胞,其具有分散在颗粒状基本上非交联壳聚糖核心基质中的细胞,其被包封在半透膜内。 细胞被截留在核心基质的壳聚糖颗粒之间,并且核心基质和膜之间基本上没有界面交联。 核心基质为细胞提供物理支持,使得细胞均匀地分散在整个核心基质中,以便使其维持,生长,增殖和分化。 包封的细胞可以通过将活细胞与壳聚糖溶液混合,将所得混合物包封在热塑性半透膜中并使壳聚糖沉淀,例如通过改变pH以形成核心基质来制备。 或者,将溶液中的壳聚糖沉淀以形成含核心基质的细胞,并将核心基质包封在半透膜中。 包封的细胞包括神经分泌细胞系,β-细胞来源的细胞系,成纤维细胞,肌细胞和神经胶质细胞。
    • 8. 发明授权
    • Particulate non cross-linked chitosan core matrices for encapsulated
cells
    • 用于封装细胞的颗粒非交联壳聚糖核心基质
    • US5871985A
    • 1999-02-16
    • US294149
    • 1994-08-22
    • Patrick AebischerBeth A. Zielinski
    • Patrick AebischerBeth A. Zielinski
    • A61K35/12A61L27/20A61L27/38C12N5/077C12N5/0793C12N11/10C12N11/04C12N5/00
    • C12N5/0012A61L27/20A61L27/38A61L27/3804C12N5/0618C12N5/0619A61K2035/128A61K35/12
    • Vehicles containing cells for implanting in the tissue of an individual are prepared having cells dispersed in a particulate, essentially non cross-linked chitosan core matrix that is enclosed within a semipermeable membrane. The cells are entrapped between chitosan particles of the core matrix and there is essentially no interfacial cross-linking between the core matrix and the membrane. The core matrix provides a physical support for viable cells within the vehicle such that the cells are evenly dispersed throughout the core matrix so as to allow their maintenance, growth, proliferation and differentiation. The vehicle can be prepared by mixing viable cells with a solution of chitosan, encapsulating the resultant mixture in a semipermeable membrane and causing the chitosan to precipitate such as by changing the pH to form the core matrix. Alternatively, the chitosan is precipitated to form the core matrix containing cells and then the core matrix is encapsulated in a semipermeable membrane. Cells within the core matrix may be neurosecretory cell lines, .beta.-cell-derived cells lines, fibroblasts, myocytes and glial cells.
    • 制备含有用于植入个体组织的细胞的载体,其具有分散在颗粒状基本上非交联壳聚糖核心基质中的细胞,所述壳聚糖核心基质被包封在半透膜内。 细胞被截留在核心基质的壳聚糖颗粒之间,并且核心基质和膜之间基本上没有界面交联。 核心基质为载体内的活细胞提供物理支持,使得细胞均匀分散在整个核心基质中,以使其维持,生长,增殖和分化。 载体可以通过将活细胞与壳聚糖溶液混合来制备,将所得混合物包封在半透膜中并使壳聚糖沉淀,例如通过改变pH以形成核心基质。 或者,将壳聚糖沉淀形成含核心基质的细胞,然后将核心基质包封在半透膜中。 核心基质内的细胞可以是神经分泌细胞系,β-细胞来源的细胞系,成纤维细胞,肌细胞和神经胶质细胞。