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    • 1. 发明授权
    • Biodegradable polymeric drug delivery system with adjuvant activity
    • 具有佐剂活性的可生物降解聚合物药物递送系统
    • US4863735A
    • 1989-09-05
    • US914380
    • 1986-10-02
    • Joachim B. KohnRobert S. LangerSteven M. NiemiJames G. Fox
    • Joachim B. KohnRobert S. LangerSteven M. NiemiJames G. Fox
    • A61K9/22A61K39/39A61K47/48C08G69/10
    • C08G69/10A61K39/39A61K47/48192A61K2039/55516A61K2039/55555A61K2039/55566Y10S514/885Y10S514/953Y10S514/963Y10S514/964Y10S514/965
    • An antigen delivery system utilizing a biodegradable polymer with good mechanical properties in combination with a material stimulating the immune system. The material having adjuvant activity may be polymer degradation products or an adjuvant which is contained within or bound to the polymer. In one embodiment, the polymer is formed from tyrosine dipeptides. Poly(CTTH-iminocarbonate) is a preferred tyrosine dipeptide polymer for constructing implantable delivery systems for antigenic material. The polymer is not an adjuvant in itself but degrades into products which stimulate the immune system. The tyrosine dipeptide can also be used as a conventional adjuvant. The advantages of the system are that a polymer can be used to form a biodegradable integral structure which is useful as both an implantable source of an antigen or other biologically active compound and as a control means for the rate of release of the biologically active compound, wherein the result is sustained, relatively constant delivery of antigen with simultaneous stimulation of the immune response.
    • 使用具有良好机械性能的生物可降解聚合物与刺激免疫系统的材料组合的抗原递送系统。 具有佐剂活性的材料可以是聚合物降解产物或包含在聚合物内或与聚合物结合的佐剂。 在一个实施方案中,聚合物由酪氨酸二肽形成。 聚(CTTH-亚氨基碳酸酯)是用于构建用于抗原材料的可植入递送系统的优选的酪氨酸二肽聚合物。 聚合物本身不是佐剂,但会降解成刺激免疫系统的产物。 酪氨酸二肽也可以用作常规佐剂。 该系统的优点是可以使用聚合物形成可生物降解的整体结构,其可用作抗原的可植入源或其它生物活性化合物,并且作为生物活性化合物的释放速率的对照手段, 其中所述结果是持续的,相对恒定的抗原递送,同时刺激免疫应答。
    • 8. 发明授权
    • Biphasic polymerization process
    • 双相聚合工艺
    • US06359102B1
    • 2002-03-19
    • US09107753
    • 1998-06-29
    • John E. KemnitzerGeorge L. BrodeJoachim B. Kohn
    • John E. KemnitzerGeorge L. BrodeJoachim B. Kohn
    • C08G6424
    • C08G64/24C08G63/6856C08G63/79C08G63/87C08G64/12
    • Improvements are disclosed for biphasic polymerization processes in which an aqueous solution of a first monomer that is hydrolytically unstable below a pH of about six or above a pH of about eight is admixed with a water-immiscible organic solvent and there is added to the admixture a catalyst selected from tertiary amine, quaternary amine and phosphonium catalysts, an acid-forming co-monomer for the first monomer, an acid scavenger, after which the resulting polymer is recovered, wherein the improvement includes providing the aqueous solution at a pH between about si and about eight, and adding to the admixture the acid-forming co-monomer and the acid scavenger at relative rates effective to maintain the pH of the admixture between about six and about eight. The catalyst may be added in a molar ratio to the first monomer effective to provide a predetermined weight-average or number-average molecular weight for the resulting polymer. Biphasic polymerization processes for monomers that are not pH sensitive are also disclosed.
    • 对于双相聚合方法公开了改进,其中将水解稳定性低于约6或大于约pH 8的水解不稳定的第一单体的水溶液与水不混溶的有机溶剂混合并加入到混合物a 选自叔胺,季胺和鏻催化剂的催化剂,用于第一单体的酸形成共聚单体,酸清除剂,之后回收所得聚合物,其中改进包括将水溶液提供在约si 和约8,并且以相对速率加入酸形成共聚单体和酸清除剂,以有效地将混合物的pH保持在约6至约8之间。 催化剂可以与第一单体的摩尔比加入,有效地为所得聚合物提供预定的重均分子量或数均分子量。 还公开了对不敏感的单体的双相聚合方法。