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    • 48. 发明申请
    • ACTIVATABLE MEMBRANE-INTERACTING PEPTIDES AND METHODS OF USE
    • 可活化的膜相互作用肽和使用方法
    • WO2014160037A2
    • 2014-10-02
    • PCT/US2014025683
    • 2014-03-13
    • UNIV CALIFORNIA
    • PAGE MICHAELCRAIK CHARLES S
    • A61K49/00C08L89/00
    • A61K49/0056A61K47/48246A61K47/48338A61K47/64A61K47/65A61K49/0032A61K49/0054C07K7/08C07K2319/00C07K2319/50C08L89/00C12N2501/385
    • The present disclosure provides activatable and detectable membrane-interacting peptides that, following activation, can interact with phospholipid bilayers, such as cell membranes. The present disclosure also provides methods of use of such compounds. The compounds of the present disclosure are of the general structure Xla-A-X2-Z-Xlb, where A is a membrane-interacting peptide region having a plurality of nonpolar hydrophobic amino acid residues that, following separation from portions Z, is capable of interaction with a phospholipid bilayer; Z is an inhibitory peptide region that can inhibit the activity of portion A; X2 is a cleavable linker that can be cleaved to release cleavage products from the compound; and Xla and Xlb are optionally-present chemical handles that facilitate conjugation of various cargo moieties to the compound. Prior to cleavage of the composition at X2, the composition acts as a promolecule that does not associate with cellular membranes to a significant or detectable level. Following cleavage at cleavable linker X2, the cleavage product including portion A is free to interact with a phospholipid bilayer (e.g., a cell membrane), and thus accumulate at a site associated with a cleavage-promoting environment. Detection of the membrane-associated cleavage product can be accomplished by detection of a moiety attached through Xla and/or Xlb. Such compositions can be used in a variety of methods, including, for example, use in directly imaging active clotting within a subject.
    • 本公开提供可激活和可检测的膜相互作用的肽,其在活化后可与磷脂双层如细胞膜相互作用。 本公开还提供了使用这种化合物的方法。 本公开的化合物具有通式结构Xla-A-X2-Z-Xlb,其中A是具有多个非极性疏水性氨基酸残基的膜相互作用肽区,其在与Z分离后能够 与磷脂双层相互作用; Z是抑制A部分活性的抑制性肽区; X2是可切割的接头,其可以被切割以从化合物释放裂解产物; Xla和Xlb是任选存在的促进各种货物部分与化合物缀合的化学手柄。 在组合物在X2切割之前,该组合物用作不与细胞膜缔合至显着或可检测水平的促分子。 在可裂解接头X2切割后,包含部分A的切割产物与磷脂双层(例如,细胞膜)自由相互作用,因此在与切割促进环境相关的位点处积累。 通过检测通过Xla和/或Xlb连接的部分可以检测膜相关切割产物。 这样的组合物可以以各种方法使用,包括例如用于直接成像受试者内的活性凝血成像。