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    • 2. 发明申请
    • Purification and stabilization of peptide and protein pharmaceutical agents
    • 肽和蛋白质药剂的纯化和稳定
    • US20040077528A1
    • 2004-04-22
    • US10719734
    • 2003-11-21
    • MannKind Corporation
    • Solomon S. SteinerRodney J. WoodsJoseph W. Sulner
    • A61K038/23A61K038/28C07K014/61C07K014/585C07K014/635
    • A61K47/22A61K9/0019A61K9/0073A61K9/0075A61K9/14A61K9/145A61K9/1617A61K9/1676A61K38/28A61K47/6949B82Y5/00C07D241/08C07K1/30C07K1/32C07K14/605C07K14/62Y10S514/866
    • Methods are provided for purifying peptides and proteins by incorporating the peptide or protein into a diketopiperazine or competitive complexing agent to facilitate removal one or more impurities, i.e. undesirable components, from the peptide or protein. In a preferred embodiment, a peptide, such as insulin, containing one or more impurities, e.g., zinc ions, is entrapped in diketopiperazine to form a precipitate of peptide/diketopiperazine/impurity, which is then washed with a solvent for the impurity to be removed, which is a nonsolvent for the diketopiperazine and a nonsolvent for the peptide. Formulations and methods also are provided for the improved transport of active agents across biological membranes, resulting for example in a rapid increase in blood agent concentration. The formulations include microparticles formed of (i) the active agent, which may be charged or neutral, and (ii) a transport enhancer that masks the charge of the agent and/or that forms hydrogen bonds with the target biological membrane in order to facilitate transport. In a preferred embodiment, insulin is administered via the pulmonary delivery of microparticles comprising fumaryl diketopiperazine and insulin in its biologically active form. The charge on the insulin molecule is masked by hydrogen bonding it to the diketopiperazine, thereby enabling the insulin to pass through the target membrane. This method of delivering insulin results in a rapid increase in blood insulin concentration that is comparable to the increase resulting from intravenous delivery.
    • 提供了通过将肽或蛋白质掺入二酮哌嗪或竞争性络合剂来促进从肽或蛋白质中去除一种或多种杂质(即不合需要的组分)来纯化肽和蛋白质的方法。 在优选的实施方案中,将包含一种或多种杂质(例如锌离子)的肽例如包被在二酮哌嗪中以形成肽/二酮哌嗪/杂质的沉淀物,然后用溶剂洗涤以使杂质为 去除,这是二酮哌嗪的非溶剂和肽的非溶剂。 提供制剂和方法用于改善活性剂在生物膜上的转运,导致例如血药剂浓度的快速增加。 制剂包括由(i)可以带电或中性的活性剂形成的微粒,和(ii)掩蔽试剂的电荷和/或与靶生物膜形成氢键的运输增强剂,以便于 运输。 在优选的实施方案中,胰岛素经由包含富马酰二酮哌嗪和胰岛素的微粒的肺部递送以其生物活性形式施用。 胰岛素分子上的电荷被氢键键合到二酮哌嗪上,从而使胰岛素能够通过靶膜。 这种递送胰岛素的方法导致血浆胰岛素浓度的快速增加,其与由静脉内递送产生的增加相当。