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    • 52. 发明授权
    • Bioadhesive microspheres and their use as drug delivery and imaging systems
    • 生物粘附微球及其作为药物递送和成像系统的用途
    • US06217908B1
    • 2001-04-17
    • US08052473
    • 1993-04-23
    • Edith MathiowitzDonald ChickeringJules Serge Jacob
    • Edith MathiowitzDonald ChickeringJules Serge Jacob
    • A61K916
    • A61K9/1641A61K9/167Y10S977/795Y10S977/906Y10S977/929
    • Bioadhesive polymers in the form of, or as a coating on, microcapsules containing drugs or bioactive substances which may serve for therapeutic, or diagnostic purposes in diseases of the gastrointestinal tract, are described. The polymeric microspheres all have a bioadhesive force of at least 11 mN/cm2 (110 N/m2). Techniques for the fabrication of bioadhesive microspheres, as well as a method for measuring bioadhesive forces between microspheres and selected segments of the gastrointestinal tract in vitro are also described. This quantitative method provides a means to establish a correlation between the chemical nature, the surface morphology and the dimensions of drug-loaded microspheres on one hand and bioadhesive forces on the other, allowing the screening of the most promising materials from a relatively large group of natural and synthetic polymers which, from theoretical consideration, should be used for making bioadhesive microspheres.
    • 描述了可以用作胃肠道疾病中的治疗或诊断目的的药物或生物活性物质的形式或作为包衣形式的生物粘附聚合物。 聚合物微球全部具有至少11mN / cm 2(110N / m 2)的生物附着力。 还描述了用于制造生物粘附微球的技术,以及用于测量体外微球和胃肠道的选定区段之间的生物粘附力的方法。 这种定量方法提供了一种手段来建立化学性质,表面形态和药物负载微球的尺寸与生物粘附力之间的相关性,另一方面可以从相对较大的组中筛选出最有希望的材料 天然和合成的聚合物,从理论上考虑,应用于制造生物粘附微球。