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    • 6. 发明授权
    • Biodegradable cross-linkers having a polyacid connected to reactive groups for cross-linking polymer filaments
    • 具有连接到用于交联聚合物长丝的反应性基团的多元酸的可生物降解的交联剂
    • US06521431B1
    • 2003-02-18
    • US09338404
    • 1999-06-22
    • Patrick F. KiserAllen A. Thomas
    • Patrick F. KiserAllen A. Thomas
    • C12N1102
    • A61K9/5138A61K9/1635A61K9/2027A61K9/5146A61L24/0042A61L27/58A61L31/148C07C69/675C07C233/20C07C243/28C07D207/46C08F8/00C08F2800/10C08F2810/20C08G63/00Y10S530/812Y10S530/813Y10S530/815Y10S977/906Y10T442/184C08F220/58
    • Biodegradable cross-linkers are provided having a polyacid core with at least two acidic groups covalently connected to reactive groups usable to cross-link polymer filaments. Between at least one reactive group and an acidic group of the polyacid is a biodegradable region which preferably consists of a hydroxyalkyl acid ester sequence having 1, 2, 3, 4, 5 or 6 hydroxyalkyl acid ester groups. The polyacid may be attached to a water soluble region that is attached to the biodegradable region having attached reactive groups. The hydroxyalkyl acid ester group is preferably a lactate or glycolate. Polyacids include diacids, triacids, tetraacids and pentaacids, and the reactive group may contain a carbon-carbon double bond. A network of cross-linked polymer filaments having adefined biodegradation rate can be formed using the cross-linkers. The network may contain biologically active molecules, and can be in the form of a microparticle or nanoparticle, or hydrogel. The polymer filaments may be preformed polymer filaments of polynucleic acids, polypeptides, proteins or carbohydrates. The cross-linkers may be copolymerized with charged monomers such as acrylic monomers containing charged groups. Applications of the cross-linkers and network include controlled release of drugs and cosmetics, tissue engineering, wound healing, hazardous waste remediation, metal chelation, swellable devices for absorbing liquids and prevention of surgical adhesions.
    • 提供了可生物降解的交联剂,其具有多酸核心,其具有共价连接到可用于交联聚合物长丝的反应性基团的至少两个酸性基团。 在多酸的至少一个反应性基团和酸性基团之间是可生物降解的区域,其优选由具有1,2,3,4,5或6个羟烷基酸酯基团的羟烷基酸酯序列组成。 多酸可以连接到附着到具有附着的反应性基团的可生物降解区域的水溶性区域。 羟烷基酸酯基优选为乳酸盐或乙醇酸盐。 多元酸包括二酸,三酸,四酸和五酸,并且反应性基团可以含有碳 - 碳双键。 可以使用交联剂形成具有定义的生物降解速率的交联聚合物长丝网。 网络可以包含生物活性分子,并且可以是微粒或纳米颗粒或水凝胶的形式。 聚合物长丝可以是多核酸,多肽,蛋白质或碳水化合物的预制聚合物长丝。 交联剂可以与带电单体共聚,例如含有带电基团的丙烯酸单体。 交联剂和网络的应用包括药物和化妆品的控制释放,组织工程,伤口愈合,危险废物修复,金属螯合,用于吸收液体的可膨胀装置和预防手术粘连。