Nanoparticles and microparticles of non-linear hydrophilic-hydrophobic
multiblock copolymers
    1.
    发明授权
    Nanoparticles and microparticles of non-linear hydrophilic-hydrophobic multiblock copolymers 失效
    非线性亲水疏水多嵌段共聚物的纳米颗粒和微粒

    公开(公告)号:US6007845A

    公开(公告)日:1999-12-28

    申请号:US582993

    申请日:1996-03-25

    摘要: Particles are provided that are not rapidly cleared from the blood stream by the macrophages of the reticuloendothelial system, and that can be modified to achieve variable release rates or to target specific cells or organs. The particles have a core of a multiblock copolymer formed by covalently linking a multifunctional compound with one or more hydrophobic polymers and one or more hydrophilic polymers, and contain a biologically active material. The terminal hydroxyl group of the poly(alkylene glycol) can be used to covalently attach onto the surface of the particles biologically active molecules, including antibodies targeted to specific cells or organs, or molecules affecting the charge, lipophilicity or hydrophilicity of the particle. The surface of the particle can also be modified by attaching biodegradable polymers of the same structure as those forming the core of the particles. The typical size of the particles is between 180 nm and 10,000 nm, preferably between 180 nm and 240 nm, although microparticles can also be formed as described herein. The particles can include magnetic particles or radiopaque materials for diagnostic imaging, biologically active molecules to be delivered to a site, or compounds for targeting the particles. The particles have a prolonged half-life in the blood compared to particles not containing poly(alkylene glycol) moieties on the surface.

    摘要翻译: PCT No.PCT / US94 / 08287 Sec。 371日期1996年1月22日 102(e)日期1996年1月22日PCT提交1994年7月22日PCT公布。 公开号WO95 / 03356 日期1995年2月2日提供了不被网状内皮系统的巨噬细胞迅速从血液中清除的颗粒,并且可以修饰以实现可变释放速率或靶向特定细胞或器官。 颗粒具有通过共价连接多官能化合物与一种或多种疏水性聚合物和一种或多种亲水性聚合物形成的多嵌段共聚物的核心,并含有生物活性材料。 聚(亚烷基二醇)的末端羟基可用于共价附着到颗粒表面上的生物活性分子,包括靶向特定细胞或器官的抗体或影响颗粒的电荷,亲油性或亲水性的分子。 颗粒的表面也可以通过连接与形成颗粒核心的那些相同结构的可生物降解的聚合物来进行改性。 颗粒的典型尺寸在180nm和10,000nm之间,优选在180nm和240nm之间,尽管也可以如本文所述形成微粒。 颗粒可以包括用于诊断成像的磁性颗粒或不透射线的材料,要递送到位点的生物活性分子或用于靶向颗粒的化合物。 与不含表面上的聚(亚烷基二醇)部分的颗粒相比,颗粒在血液中具有延长的半衰期。

    Unsaturated polyanhydrides
    6.
    发明授权
    Unsaturated polyanhydrides 失效
    不饱和聚酐

    公开(公告)号:US5019379A

    公开(公告)日:1991-05-28

    申请号:US80090

    申请日:1987-07-31

    摘要: A class of unsaturated polyanhydrides having double bonds available for secondary polymerization is disclosed. A crosslinked material having improved or different physical and mechanical properties can be prepared from these polyanhydrides, via secondary polymerization. The synthesis and characteristics of one unsaturated polyanhydride based on fumaric acid and its copolymers with aliphatic and aromatic diacids, prepared by either the melt-polycondensation method or by solution polymerization, is described in detail.These polymers are well suited for use in controlled release drug delivery devices. The polymers can also be used as a bioerodible bone cement where the polymer is first cast as a solution onto a bone fracture and then crosslinked by radiation or radical polymerization to yield a strong, adhesive material.

    摘要翻译: 公开了一类具有可用于二次聚合的双键的不饱和聚酐。 可以通过二次聚合从这些聚酐制备具有改善或不同物理和机械性能的交联材料。 详细描述了通过熔融缩聚法或通过溶液聚合制备的一种不饱和聚酐与富马酸及其与脂族和芳族二酸的共聚物的合成和特性。 这些聚合物非常适合用于控释药物递送装置。 聚合物也可以用作生物可蚀解的骨水泥,其中首先将聚合物作为溶液浇铸到骨折上,然后通过辐射或自由基聚合进行交联以产生强的粘合剂材料。

    Controlled local delivery of chemotherapeutic agents for treating solid tumors
    7.
    再颁专利
    Controlled local delivery of chemotherapeutic agents for treating solid tumors 有权
    用于治疗实体瘤的化疗药物的局部控制

    公开(公告)号:USRE37410E1

    公开(公告)日:2001-10-16

    申请号:US09363519

    申请日:1999-07-29

    IPC分类号: A61K914

    摘要: A method and devices for localized delivery of a chemotherapeutic agent to solid tumors, wherein the agent does not cross the blood-brain barrier and is characterized by poor bioavailability and/or short half-lives in vivo, are described. The devices consist of reservoirs which release drug over an extended time period while at the same time preserving the bioactivity and bioavailability of the agent. In the most preferred embodiment, the device consists of biodegradable polymeric matrixes, although reservoirs can also be formulated from non-biodegradable polymers or reservoirs connected to implanted infusion pumps. The devices are implanted within or immediately adjacent the tumors to be treated or the site where they have been surgically removed. The examples demonstrate the efficacy of paclitaxel and camptothecin delivered in polymeric implants prepared by compression molding of biodegradable and non-biodegradable polymers, respectively. The results are highly statistically significant.

    摘要翻译: 描述了用于将化学治疗剂局部递送至实体瘤的方法和装置,其中所述药物不穿过血脑屏障并且其特征在于体内生物利用度差和/或半衰期短。 这些装置包括在延长的时间段内释放药物的储存器,同时保持药剂的生物活性和生物利用度。 在最优选的实施方案中,该装置由可生物降解的聚合物基质组成,尽管储存器也可以由与植入的输注泵连接的不可生物降解的聚合物或储存器配制。 这些装置被植入到待治疗的肿瘤内或紧邻其中,或被手术切除的部位。 这些实施例证明分别通过压缩成型可生物降解和不可生物降解的聚合物制备的聚合物植入物中递送的紫杉醇和喜树碱的功效。 结果具有很高的统计学意义。

    Controlled local delivery of chemotherapeutic agents for treating solid
tumors
    8.
    发明授权
    Controlled local delivery of chemotherapeutic agents for treating solid tumors 失效
    用于治疗实体瘤的化疗药物的局部控制

    公开(公告)号:US5846565A

    公开(公告)日:1998-12-08

    申请号:US750736

    申请日:1996-12-18

    摘要: A method and devices for localized delivery of a chemotherapeutic agent to solid tumors, wherein the agent does not cross the blood-brain barrier and is characterized by poor bioavailability and/or short half-lives in vivo, are described. The devices consist of reservoirs which release drug over an extended period while at the same time preserving the bioactivity and bioavailability of the agent. In the most preferred embodiment, the device consists of biodegradable polymeric matrixes, although reservoirs can also be formulated from non-biodegradable polymers or reservoirs connected to implanted infusion pumps. The devices are implanted within or immediately adjacent the tumors to be treated or the site where they have been surgically removed.

    摘要翻译: PCT No.PCT / US95 / 09805 Sec。 371日期:1996年12月18日 102(e)日期1996年12月18日PCT提交1995年8月2日PCT公布。 公开号WO96 / 03984 日期1996年2月15日描述了一种用于将化学治疗剂局部递送至实体瘤的方法和装置,其中所述药物不穿过血脑屏障,其特征在于生物利用度差和/或体内半衰期短。 这些装置由长期释放药物的储存器组成,同时保持药剂的生物活性和生物利用度。 在最优选的实施方案中,该装置由可生物降解的聚合物基质组成,尽管储存器也可以由与植入的输注泵连接的不可生物降解的聚合物或储存器配制。 这些装置被植入到待治疗的肿瘤内或紧邻其中,或被手术切除的部位。

    Pure polyanhydride from dicarboxylic acid and coupling agent
    10.
    发明授权
    Pure polyanhydride from dicarboxylic acid and coupling agent 失效
    来自二羧酸和偶联剂的纯聚酐

    公开(公告)号:US4916204A

    公开(公告)日:1990-04-10

    申请号:US80332

    申请日:1987-07-31

    摘要: A method for synthesizing polyanhydrides in solution using coupling agents and a removable acid acceptor to effect a one-step polymerization of dicarboxylic acids. As used in the method, these coupling agents include phosgene, diphosgene, and acid chlorides. Insoluble acid acceptors include insoluble polyamines and crosslinked polyamines such as polyethyleneimine and polyvinylpyridine and inorganic bases such as K.sub.2 CO.sub.3, Na.sub.2 CO.sub.3, NaHCO.sub.3, and CaCO.sub.3. The only byproduct formed is a removable hydrochloric acid-acid acceptor.Examples are provided of the polymerization of highly pure polyanhydrides using phosgene, diphosgene or an acid chloride as the coupling agent, in combination with either an insoluble acid acceptor or a soluble acid acceptor in a solvent wherein the polymerization byproduct or polymer is insoluble.A particularly important application of these polyanhydrides is in the formation of drug delivery devices containing bioactive compounds. The method is also useful in the polymerization of dicarboxylic acids including heat liable dipeptides of glutamic or aspartic acid.

    摘要翻译: 使用偶联剂和可除去的酸受体在溶液中合成聚酐以进行二羧酸的一步聚合的方法。 如该方法所用,这些偶联剂包括光气,双光气和酰氯。 不溶性酸受体包括不溶性多胺和交联聚胺如聚乙烯亚胺和聚乙烯吡啶以及无机碱如K 2 CO 3,Na 2 CO 3,NaHCO 3和CaCO 3。 形成的唯一副产物是可除去的盐酸酸受体。 提供了使用光气,双极光或酰氯作为偶联剂的高纯度聚酐与在溶剂中的不溶性酸受体或可溶性酸受体组合的聚合反应,其中聚合副产物或聚合物是不溶的。 这些多酸酐的特别重要的应用是形成含有生物活性化合物的药物递送装置。 该方法也可用于二羧酸的聚合,包括谷氨酸或天冬氨酸的热应答二肽。