Method of preparing bioerodible polymers having pH sensitivity in the
acid range and resulting product
    23.
    发明授权
    Method of preparing bioerodible polymers having pH sensitivity in the acid range and resulting product 失效
    制备在酸范围内具有pH敏感性的生物可腐蚀聚合物的方法和所得产物

    公开(公告)号:US4764364A

    公开(公告)日:1988-08-16

    申请号:US833215

    申请日:1986-02-25

    摘要: Biodegradible polymers are provided which may contain a biologically active substance, e.g. a drug such as insulin, which is released over a period of time as the polymer erodes when in contact with a body fluid. The polymer contains an amine functionality whereby it erodes faster at low acid pH's than at higher acid pH's. As an example, the polymer may contain insulin and may contain or may have an encapsulating hydrogel containing glucose oxidase. As the blood sugar level of a diabetic person rises, e.g., afte a meal, glucose diffuses into the polymer or hydrogel and is converted to gluconic acid which lowers the pH, and accelerates erosion and the release of insulin.

    摘要翻译: 提供可生物降解的聚合物,其可以含有生物活性物质,例如 一种药物如胰岛素,当与体液接触时聚合物侵蚀时,其释放一段时间。 该聚合物含有胺官能团,由此其在低酸性pH下比在较高酸性pH下更快地腐蚀。 作为示例,聚合物可以含有胰岛素,并且可以含有或可以具有含有葡萄糖氧化酶的包封水凝胶。 当糖尿病患者的血糖水平上升时,例如餐后,葡萄糖扩散到聚合物或水凝胶中,并转化为降低pH的葡萄糖酸,并加速胰岛素的侵蚀和释放。

    PEG-poly(ortho ester) graft copolymers and pharmaceutical compositions
    28.
    发明授权
    PEG-poly(ortho ester) graft copolymers and pharmaceutical compositions 有权
    PEG-聚(原酸酯)接枝共聚物和药物组合物

    公开(公告)号:US07456213B2

    公开(公告)日:2008-11-25

    申请号:US11392989

    申请日:2006-03-28

    申请人: Jorge Heller

    发明人: Jorge Heller

    IPC分类号: A61K31/335 A61K47/34

    CPC分类号: A61K9/0048 A61K47/34

    摘要: This invention relates to graft copolymer delivery vehicles comprising a polyethyleneglycol-poly(ortho ester), and to controlled release pharmaceutical compositions comprising the delivery vehicle and an active agent. The graft copolymer delivery vehicles may be thermogels graft copolymers. The pharmaceutical compositions may be in the form of a topical, syringable, or injectable formulation for local controlled delivery of the active agent.

    摘要翻译: 本发明涉及包含聚乙二醇 - 聚(原酸酯)的接枝共聚物递送载体,以及包含递送载体和活性剂的控释药物组合物。 接枝共聚物递送载体可以是热凝胶接枝共聚物。 药物组合物可以是局部,注射的或可注射的制剂的形式,用于局部控制递送活性剂。

    Bioerodible porous compositions
    30.
    发明授权
    Bioerodible porous compositions 失效
    生物腐蚀性多孔组合物

    公开(公告)号:US6096344A

    公开(公告)日:2000-08-01

    申请号:US806513

    申请日:1997-02-24

    摘要: A composition for the sequestration and sustained delivery of an active ingredient in the form of porous particles, the composition comprising the product of the controlled dehydration of particles formed by the reaction of a polymeric anionic material with a polyvalent cation. The composition may be loaded with an active ingredient by soaking the particles in a solution of the active ingredient; and may then be dehydrated. They may then be soaked in a solution of a polymeric cationic material, to form particles providing the controlled release of the active ingredient.

    摘要翻译: 用于多孔颗粒形式的活性成分的螯合和持续递送的组合物,该组合物包含通过聚合阴离子材料与多价阳离子的反应形成的颗粒受控脱水的产物。 组合物可以通过将颗粒浸泡在活性成分的溶液中来装载活性成分; 然后可以脱水。 然后将它们浸泡在聚合物阳离子材料的溶液中,以形成提供活性成分的受控释放的颗粒。