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    • 2. 发明授权
    • Materials and methods for the immobilization of bioactive species onto
polymeric substrates
    • 将生物活性物质固定在聚合物基材上的材料和方法
    • US5897955A
    • 1999-04-27
    • US138197
    • 1998-08-21
    • Paul D. Drumheller
    • Paul D. Drumheller
    • A61L27/34C07K17/08C12N5/00C12N11/08B32B27/00B32B17/06G01N33/53
    • C07K17/08A61L27/34C12N11/08C12N5/0068C12N2533/30C12N2533/50Y10T428/249958Y10T428/31544
    • The present invention is directed to support members having surfaces that are rendered hydrophilic for use as a substrate for the immobilization of bioactive species thereon. The hydrophilic surfaces are chemically stable on the support member. The surfaces are also chemically variable to provide a variety of chemically functional groups for immobilization of bioactive species thereto. The surfaces comprise polymeric surfactants attached onto the surfaces of a support member and covalently cross-linked thereon to form a first layer. Hydrophilic polymers are then attached to the first layer on the support member to form a second layer thereon. The second layer is used to enhance the hydrophilicity of a support member, as well as, to provide a substrate for immobilizing bioactive species thereto. Methods for forming the first and second layers are also provided. In addition, methods for attaching bioactive substances to the hydrophilic polymers are provided.
    • 本发明涉及具有使其具有亲水性的表面的支撑构件,其用作固定生物活性物质的基底。 亲水表面在支撑构件上是化学稳定的。 表面也是化学变化的,以提供用于将生物活性物质固定化的各种化学官能团。 表面包括附着在支撑构件的表面上并且共价交联在其上以形成第一层的聚合物表面活性剂。 然后将亲水性聚合物连接到支撑构件上的第一层上以在其上形成第二层。 第二层用于增强支撑构件的亲水性,以及提供用于固定生物活性物质的基底。 还提供了形成第一层和第二层的方法。 此外,提供了将生物活性物质附着到亲水性聚合物上的方法。
    • 6. 发明授权
    • Cell encapsulating device containing a cell displacing core for
maintaining cell viability
    • 包含用于维持细胞活力的细胞置换核心的细胞包封装置
    • US5980889A
    • 1999-11-09
    • US906367
    • 1997-08-05
    • Mark D. ButlerStanley L. Mish
    • Mark D. ButlerStanley L. Mish
    • A61K9/00C12P21/04A01N63/00C12N5/00C12N11/04
    • A61K9/0092A61K9/0024A61K9/0085
    • Cell encapsulating devices capable of maintaining large numbers of viable cells are provided containing an inert, substantially cell-free core that displaces cells, a permeable membrane and a zone for maintaining cells. The permeable membrane surrounds the core such that the zone of cells is bounded by the core and the permeable membrane. The cell zone may contain a support means for cell attachment and the core may have an outer boundary containing a material that promotes cell adhesion. Preferably, the cell zone has a thickness such that at least about 10% of the cells, more preferably at least about 50% or 80%, in a cell layer located closest to the outer boundary of the core remain viable. The thickness is preferably less than 500 microns such as 25 to 250 microns or 50 to 100 microns. The devices are suitable for implantation into an individual in need of treatment and are capable of supplying therapeutic substances to such individuals.
    • 提供能够维持大量活细胞的细胞包封装置,其包含置换细胞,可渗透膜和用于维持细胞的区域的惰性,基本上无细胞的核。 渗透膜围绕核心,使得细胞区域被核心和可渗透膜界定。 细胞区域可以包含用于细胞附着的支持装置,并且核心可以具有包含促进细胞粘附的材料的外边界。 优选地,细胞区具有这样的厚度,使得位于最靠近核的外边界的细胞层中至少约10%的细胞,更优选至少约50%或80%保持活性。 厚度优选小于500微米,例如25至250微米或50至100微米。 该装置适于植入需要治疗的个体中,并且能够向这些个体供应治疗物质。
    • 8. 发明授权
    • Materials and methods for the immobilization of bioactive species onto
polymeric substrates
    • 将生物活性物质固定在聚合物基材上的材料和方法
    • US5914182A
    • 1999-06-22
    • US660698
    • 1996-06-03
    • Paul D. Drumheller
    • Paul D. Drumheller
    • A61L27/34C07K17/08C12N5/00C12N11/08B32B5/14
    • C07K17/08A61L27/34C12N11/08C12N5/0068C12N2533/30C12N2533/50Y10T428/249958Y10T428/31544
    • The present invention is directed to support members having surfaces that are rendered hydrophilic for use as a substrate for the immobilization of bioactive species thereon. The hydrophilic surfaces are chemically stable on the support member. The surfaces are also chemically variable to provide a variety of chemically functional groups for immobilization of bioactive species thereto. The surfaces comprise polymeric surfactants attached onto the surfaces of a support member and covalently cross-linked thereon to form a first layer. Hydrophilic polymers are then attached to the first layer on the support member to form a second layer thereon. The second layer is used to enhance the hydrophilicity of a support member, as well as, to provide a substrate for immobilizing bioactive species thereto. Methods for forming the first and second layers are also provided. In addition methods for attaching bioactive substances to the hydrophilic polymers are provided.
    • 本发明涉及具有使其具有亲水性的表面的支撑构件,其用作固定生物活性物质的基底。 亲水表面在支撑构件上是化学稳定的。 表面也是化学变化的,以提供用于将生物活性物质固定化的各种化学官能团。 表面包括附着在支撑构件的表面上并且共价交联在其上以形成第一层的聚合物表面活性剂。 然后将亲水性聚合物连接到支撑构件上的第一层上以在其上形成第二层。 第二层用于增强支撑构件的亲水性,以及提供用于固定生物活性物质的基底。 还提供了形成第一层和第二层的方法。 另外提供了将生物活性物质附着到亲水性聚合物上的方法。