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    • 5. 发明申请
    • SILK NANOSPHERES AND MICROSPHERES AND METHODS OF MAKING SAME
    • 丝绸纳米球和微球及其制备方法
    • WO2011041395A3
    • 2011-08-25
    • PCT/US2010050698
    • 2010-09-29
    • TUFTS COLLEGEWANG XIAOQINKAPLAN DAVID L
    • WANG XIAOQINKAPLAN DAVID L
    • B82B3/00B82B1/00
    • A61K9/5169A61K9/14A61K9/1605A61K9/1647A61K9/5052A61K9/5089A61K9/5192A61K31/352Y10T428/2982
    • The present invention provides for methods of preparing silk nanoparticles and microparticles, methods of encapsulating an active agent into the silk nano- and microparticles and compositions comprising these silk particles. In particular, the silk spheres are prepared from phase separation of silk and polyvinyl alcohol (PVA), without exposure to an organic solvent. The method employs a chemical, PVA, which is an FDA-approved ingredient in drug formulations. Different parameters can be adjusted to control the size and shape of the silk spheres during the fabrication process. The silk particle compositions of the present invention may also encapsulate active agents or chemicals. Such compositions allow the active agents to be controllably and sustainably released to the target organs or tissues. The silk composition entrapping active agents also provides for a long-term storage medium for the active agents so entrapped. The silk nano- and microparticles of the present invention are thus suitable for a variety of biomedical and pharmaceutical applications, such as drug delivery or tissue engineering.
    • 本发明提供制备丝纳米颗粒和微颗粒的方法,将活性剂包封到丝纳米颗粒和微颗粒中的方法以及包含这些丝颗粒的组合物。 特别地,丝球由丝和聚乙烯醇(PVA)的相分离制备,而不暴露于有机溶剂。 该方法使用化学药品PVA,它是药物制剂中FDA批准的成分。 可以调整不同的参数来控制制造过程中丝球的尺寸和形状。 本发明的丝粒组合物也可以包封活性剂或化学品。 这样的组合物允许活性剂可控地并且可持续地释放到靶器官或组织。 捕获活性剂的丝组合物也为这种包埋的活性剂提供了长期存储介质。 因此,本发明的蚕丝纳米颗粒和微米颗粒适用于各种生物医学和药物应用,例如药物递送或组织工程。
    • 7. 发明申请
    • ACTIVE SILK MUCO-ADHESIVES, SILK ELECTROGELATION PROCESS, AND DEVICES
    • 主动丝光胶粘剂,丝光电镀工艺和器件
    • WO2010036992A3
    • 2010-05-20
    • PCT/US2009058534
    • 2009-09-28
    • TUFTS COLLEGEBERNHARD NICOLAI NLO TIM JIA-CHINGLEISK GARY GKAPLAN DAVID L
    • BERNHARD NICOLAI NLO TIM JIA-CHINGLEISK GARY GKAPLAN DAVID L
    • A61L27/36A61F2/02
    • H01L41/193A61L27/227A61L27/34A61L27/3604A61L27/38A61L27/52C08L89/00
    • The present invention provides for compositions, methods and devices for rapidly converting silk fibroin solution into a silk fibroin gel using direct application of voltage, in a process called electrogelation. The silk fibroin gel may be reversibly converted back to liquid form by applying reverse voltage or may be converted further to ß-sheet structure by applying shear force or other treatments. The electrogelated silk may be used as an extracted bulk gel, spray or stream of gel for processing into materials or devices, or may be used as silk gel coating to devices. Active agents may be embedded in the silk gel for a variety of medical applications. The electrogelated silk exists as a piezoelectric silk material comprising a mixture of silk fibroin proteins having silk I conformation and silk ß-sheet structure. Silk electrogelation process of the present invention is useful in variety of applications such as tissue engineering, medical device or implants, drug delivery, soft robotics or motion associated technology.
    • 本发明提供了在称为电凝胶的方法中使用直接施加电压将丝素蛋白溶液快速转化成丝素蛋白凝胶的组合物,方法和装置。 丝素蛋白凝胶可以通过施加反向电压而被可逆地转换成液体形式,或者可以通过施加剪切力或其它处理而进一步转化成β片结构。 电致凝胶丝可以用作提取的体积凝胶,喷雾或凝胶流加工成材料或装置,或者可以用作设备的丝凝胶涂层。 活性剂可以嵌入丝绸凝胶中用于各种医疗应用。 电致凝胶丝作为压电丝材料存在,其包含具有丝绸构象和丝绸ß片材结构的丝素蛋白的混合物。 本发明的丝网印刷方法可用于组织工程,医疗装置或植入物,药物递送,软机器人或运动相关技术等各种应用。