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54 条记录 (耗时 0.025 秒)

    Controlled delivery of therapeutic agents by insertable medical devices
    11.
    发明授权
    Controlled delivery of therapeutic agents by insertable medical devices 失效
    通过可插入的医疗设备控制治疗剂的输送

    公开(公告)号：US06899731B2

    公开(公告)日：2005-05-31

    申请号：US09750779

    申请日：2001-01-02

    申请人： Weiping Li ,  Hai-Quan Mao ,  Kam W. Leong

    发明人： Weiping Li ,  Hai-Quan Mao ,  Kam W. Leong

    IPC分类号： A61L29/16 ,  A61L31/16 ,  A61F2/06 ,  A61K48/00

    CPC分类号： A61L31/16 ,  A61L29/16 ,  A61L2300/258 ,  A61L2300/416 ,  A61L2300/602 ,  A61L2300/608 ,  A61L2300/802

    摘要： A medical device and method for transportation and release of a therapeutic agent into a mammalian body are disclosed. The medical device is coated with alternating layers of a negatively charged therapeutic agent and a cationic polyelectrolyte, following a controlled adsorption technique. The method is simple, with minimal perturbation to the therapeutic agent and uses clinically acceptable biopolymers such as human serum albumin. The amount of the therapeutic agent that can be delivered by this technique is optimized by the number of the layers of the therapeutic agent adsorbed on the surface of medical device. There is a washing step between alternate layers of the therapeutic agent and cationic polyelectrolyte carrier, so that the amount of the therapeutic agent on the insertable medical device represents the portion that is stably entrapped and adsorbed on to the medical device. The insertable medical device and method according to this invention are capable of reproducibly delivering therapeutic agent to a site in a mammalian body, and allow for a highly reproducible and controllable release kinetics of the therapeutic agent.

    摘要翻译： 公开了用于将哺乳动物体内的治疗剂输送和释放的医疗装置和方法。 在受控吸附技术之后，医疗装置涂覆有带负电的治疗剂和阳离子聚电解质的交替层。 该方法简单，对治疗剂的扰动最小，并且使用临床可接受的生物聚合物例如人血清白蛋白。 通过该技术可以递送的治疗剂的量通过吸收在医疗装置表面上的治疗剂的层数来优化。 在治疗剂和阳离子聚电解质载体的交替层之间存在洗涤步骤，使得可插入医疗装置上的治疗剂的量表示稳定地截留并吸附到医疗装置上的部分。 根据本发明的可插入医疗装置和方法能够将治疗剂可再现地递送到哺乳动物体内的部位，并且允许治疗剂的高度可重现和可控的释放动力学。

    Therapeutic nanospheres
    13.
    发明授权
    Therapeutic nanospheres 失效
    治疗纳米球

    公开(公告)号：US06207195B1

    公开(公告)日：2001-03-27

    申请号：US09095882

    申请日：1998-06-11

    申请人： Scott Walsh ,  Ronald Rubenstein ,  Pam Zeitlin ,  Kam W. Leong

    发明人： Scott Walsh ,  Ronald Rubenstein ,  Pam Zeitlin ,  Kam W. Leong

    IPC分类号： C12N1500

    CPC分类号： A61K9/5169 ,  A61K31/192 ,  A61K45/06 ,  A61K47/62 ,  A61K47/6435 ,  A61K47/6929 ,  A61K48/00 ,  B82Y5/00 ,  Y10S977/884 ,  Y10S977/906 ,  Y10S977/915 ,  Y10S977/92 ,  Y10S977/923

    摘要： 4-Phenylbutyrate exerts many beneficial biological effects. It appears to induce the transcription of certain promoters, as well as having a remedial effect on proteins which are aberrantly localized within the cell. In addition, it appears to cause cells to developmentally differentiate. The present invention provides nanosphere formulations of 4-phenylbutyrate and other drugs which remediate defective protein localization intracellularly. These formulations permit lower concentrations of drugs to be administered, providing both cost and safety benefits.

    摘要翻译： 4-苯基丁酸酯具有许多有益的生物学效应。 似乎诱导某些启动子的转录，以及对细胞内异常定位的蛋白质具有补救作用。 此外，它似乎导致细胞发育分化。 本发明提供4-苯基丁酸酯和其它药物的纳米球配方，其可以修复细胞内的缺陷蛋白质定位。 这些制剂允许施用较低浓度的药物，既提供成本和安全性益处。

    Biodegradable polymers chain-extended by phosphates, compositions, articles and methods for making and using the same
    14.
    发明授权
    Biodegradable polymers chain-extended by phosphates, compositions, articles and methods for making and using the same 失效
    通过磷酸盐，组合物，制品和制造和使用它们的方法延伸的可生物降解的聚合物

    公开(公告)号：US6166173A

    公开(公告)日：2000-12-26

    申请号：US53649

    申请日：1998-04-02

    申请人： Hai-Quan Mao ,  Kam W. Leong ,  Zhong Zhao ,  James P. English

    发明人： Hai-Quan Mao ,  Kam W. Leong ,  Zhong Zhao ,  James P. English

    IPC分类号： A61L27/00 ,  A61K9/00 ,  A61K9/16 ,  A61L17/10 ,  A61L17/12 ,  A61L24/00 ,  A61L26/00 ,  A61L27/14 ,  A61L27/18 ,  C08G63/692 ,  C08G63/91 ,  C08G69/42 ,  C08G79/04 ,  C08L67/00 ,  C08L77/00 ,  C08L85/02 ,  C08L101/16 ,  A61K31/80

    CPC分类号： A61K9/0024 ,  A61K9/1647 ,  A61L17/12 ,  A61L26/0019 ,  A61L27/18 ,  C08G63/6922 ,  C08G63/912 ,  Y10S623/924 ,  C08L85/02

    摘要： Biodegradable polymers are described comprising the recurring monomeric units shown in formula I or II: wherein X is --O-- or --NR'--, where R' is H or alkyl; L is a branched or straight chain aliphatic group having from 1-20 carbon atoms; M.sub.1 and M.sub.2 are each independently (1) a branched or straight chain aliphatic group having from 1-20 carbon atoms; or (2) a branched or straight chain, oxy-, carboxy- or amino-aliphatic group having from 1-20 carbon atoms; Y is --O--, --S-- or --NR'--, where R' is H or alkyl; R is H, alkyl, alkoxy, aryl, aryloxy, heterocyclic or heterocycloxy; the molar ratio of x:y is about 1; the molar ratio n:(x or y) is between about 200:1 and 1:200; and the molar ratio q:r is between about 1:99 and 99:1; wherein said biodegradable polymer is biocompatible before and upon biodegradat.Processes for preparing the polymers, compositions containing the polymers and biologically active substances, articles useful for implantation or injection into the body fabricated from the compositions, and methods for controllably releasing biologically active substances using the polymers, are also described.

    摘要翻译： 描述包含式I或II所示的重复单体单元的生物可降解聚合物：其中X是-O-或-NR'-，其中R'是H或烷基; L是具有1-20个碳原子的支链或直链脂族基团; M1和M2各自独立地为（1）具有1-20个碳原子的支链或直链脂族基团; 或（2）具有1-20个碳原子的支链或直链，氧基，羧基或氨基 - 脂族基团; Y是-O - ， - S-或-NR'-，其中R'是H或烷基; R是H，烷基，烷氧基，芳基，芳氧基，杂环或杂环氧基; x：y的摩尔比为约1; 摩尔比n：（x或y）在约200:1和1:200之间; 并且摩尔比q：r在约1:99和99:1之间; 其中所述可生物降解聚合物在生物降解之前和之后是生物相容的。 还描述了制备聚合物的方法，含有聚合物和生物活性物质的组合物，用于植入或注射到由组合物制造的身体中的制品，以及使用该聚合物可控地释放生物活性物质的方法。

    Controlled release of pharmaceutically active substances from coacervate microcapsules
    16.
    发明授权
    Controlled release of pharmaceutically active substances from coacervate microcapsules 失效
    将药物活性物质从凝聚微胶囊中控制释放

    公开(公告)号：US5759582A

    公开(公告)日：1998-06-02

    申请号：US695514

    申请日：1996-08-12

    申请人： Kam W. Leong ,  Rosa V. Azhari

    发明人： Kam W. Leong ,  Rosa V. Azhari

    IPC分类号： A61K9/16 ,  A61K9/52 ,  A61K9/50

    CPC分类号： A61K9/1652 ,  A61K9/1658 ,  Y10T428/2984

    摘要： A controlled-release pharmaceutical composition comprising a pharmaceutically active water soluble protein, peptide, glycoprotein, or mixture thereof, encapsulated in the form of microspheres by a coating of a crosslinked coacervate of gelatin and chondroitin sulfate, as well as processes for the preparation thereof.

    摘要翻译： 包含药物活性的水溶性蛋白质，肽，糖蛋白或其混合物的控释药物组合物，以及其制备方法，所述药物活性水溶性蛋白质，肽，糖蛋白或其混合物通过涂层的明胶和硫酸软骨素涂层以微球的形式包封。

    Electroactive Scaffold
    19.
    发明申请
    Electroactive Scaffold 有权
    电动支架

    公开(公告)号：US20110142806A1

    公开(公告)日：2011-06-16

    申请号：US12969076

    申请日：2010-12-15

    申请人： Lisa A. Scott-Carnell ,  Emilie J. Siochi ,  Nancy M. Holloway ,  Kam W. Leong ,  Karina Kulangara

    发明人： Lisa A. Scott-Carnell ,  Emilie J. Siochi ,  Nancy M. Holloway ,  Kam W. Leong ,  Karina Kulangara

    IPC分类号： A61K35/12 ,  C12N5/071 ,  C12N13/00 ,  A61P25/00 ,  A61P37/00 ,  B29C47/00

    CPC分类号： C12N5/0068 ,  A61K35/12 ,  A61K35/28 ,  A61L27/16 ,  A61L27/3834 ,  C12N11/08 ,  C12N13/00 ,  C12N2529/00 ,  C12N2533/30 ,  C08L27/16

    摘要： A scaffold assembly and related methods of manufacturing and/or using the scaffold for stem cell culture and tissue engineering applications are disclosed which at least partially mimic a native biological environment by providing biochemical, topographical, mechanical and electrical cues by using an electroactive material. The assembly includes at least one layer of substantially aligned, electrospun polymer fiber having an operative connection for individual voltage application. A method of cell tissue engineering and/or stem cell differentiation uses the assembly seeded with a sample of cells suspended in cell culture media, incubates and applies voltage to one or more layers, and thus produces cells and/or a tissue construct. In another aspect, the invention provides a method of manufacturing the assembly including the steps of providing a first pre-electroded substrate surface; electrospinning a first substantially aligned polymer fiber layer onto the first surface; providing a second pre-electroded substrate surface; electrospinning a second substantially aligned polymer fiber layer onto the second surface; and, retaining together the layered surfaces with a clamp and/or an adhesive compound.

    摘要翻译： 公开了制造和/或使用用于干细胞培养和组织工程应用的支架的支架组件和相关方法，其通过使用电活性材料提供生物化学，地形学，机械和电学提示，至少部分地模拟天然生物环境。 该组件包括至少一层基本对准的电纺聚合物纤维，其具有用于单独电压施加的操作连接。 细胞组织工程和/或干细胞分化的方法利用悬浮在细胞培养基中的细胞样品接种组合物，孵育并施加电压至一层或多层，从而产生细胞和/或组织构建体。 另一方面，本发明提供一种制造组件的方法，其包括以下步骤：提供第一预电镀基底表面; 将第一基本上排列的聚合物纤维层静电纺丝到第一表面上; 提供第二预电镀衬底表面; 将第二基本上排列的聚合物纤维层静电纺丝到第二表面上; 并且用夹具和/或粘合剂化合物将层压表面保持在一起。