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34 条记录 (耗时 0.021 秒)

    Biodegradable polymers, compositions, articles and methods for making and using the same
    21.
    发明授权
    Biodegradable polymers, compositions, articles and methods for making and using the same 失效
    可生物降解的聚合物，组合物，制品及其制备和使用方法

    公开(公告)号：US06238687B1

    公开(公告)日：2001-05-29

    申请号：US09286713

    申请日：1999-04-05

    申请人： Hai-Quan Mao ,  Kam W. Leong

    发明人： Hai-Quan Mao ,  Kam W. Leong

    IPC分类号： A61F202

    CPC分类号： C08G79/04 ,  A61K9/204 ,  A61L15/26 ,  A61L17/10 ,  A61L26/0019 ,  A61L27/18 ,  A61L27/34 ,  A61L29/06 ,  A61L31/06 ,  C08L85/02

    摘要： Biodegradable polymer compositions that degrade in vivo into non-toxic residues are described. In part, the present invention is directed to such polymers containing phosphorus and desaminotyrosyl L-tyrosine linkages in the polymer backbone. Processes for preparing such polymers, compositions containing such 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： 描述了将体内降解为无毒残留物的生物可降解聚合物组合物。 部分地，本发明涉及在聚合物主链中含有磷和脱氨基酪氨酰L-酪氨酸键的这种聚合物。 还描述了制备这种聚合物的方法，含有这种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。

    BIODEGRADABLE POLYPHOSPHATES COMPLEX FOR CONTROLLED RELEASE OF BIOACTIVE SUBSTANCES AND RELATED METHODS
    25.
    发明申请
    BIODEGRADABLE POLYPHOSPHATES COMPLEX FOR CONTROLLED RELEASE OF BIOACTIVE SUBSTANCES AND RELATED METHODS 审中-公开
    生物可降解的多磷酸盐复合物用于控制释放生物物质及相关方法

    公开(公告)号：US20080176959A1

    公开(公告)日：2008-07-24

    申请号：US12016183

    申请日：2008-01-17

    申请人： Jun WANG ,  Hai-Quan MAO ,  Kam Weng LEONG

    发明人： Jun WANG ,  Hai-Quan MAO ,  Kam Weng LEONG

    IPC分类号： A61K47/48

    CPC分类号： C08L85/02 ,  A61K9/1647 ,  A61K9/204 ,  A61K47/34 ,  A61K47/605 ,  A61K47/645 ,  A61K48/0041 ,  C08G79/04 ,  C12N15/87

    摘要： The present invention is directed to a biodegradable system for the controlled release of bioactive substances. This system comprises novel biodegradable and biocompatible polyphosphoesters that carry positive charges. Process for making these polyphosphoesters, compositions containing these polyphosphoesters and biologically active substances, articles and methods for delivery of drugs and genes using this system are described. A controlled gene delivery system based on these polyphosphoesters is prepared by complex coacervation of nucleic acid (DNA or RNA) with polymers. The release rates can be manipulated by adjusting the charge ratios of polyphosphoesters to nucleic acids. This gene delivery system yields a higher gene expression in muscle when injected intramuscularly.

    摘要翻译： 本发明涉及用于控制释放生物活性物质的可生物降解的系统。 该系统包含携带正电荷的新型生物可降解和生物相容性聚磷酸酯。 描述了制备这些聚磷酸酯的方法，含有这些聚磷酸酯和生物活性物质的组合物，使用该系统递送药物和基因的制品和方法。 通过核酸（DNA或RNA）与聚合物的复合凝聚来制备基于这些多聚磷酸酯的受控基因递送系统。 可以通过调节多聚磷酸酯与核酸的电荷比来操纵释放速率。 当肌内注射时，该基因递送系统在肌肉中产生较高的基因表达。

    Controlled delivery of therapeutic agents by insertable medical devices
    27.
    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。

    Biodegradable polymers chain-extended by phosphates, compositions, articles and methods for making and using the same
    29.
    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。