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    • 31. 发明公开
    • SELECTIVE DELIVERY OF MOLECULES INTO CELLS OR MARKING OF CELLS IN DISEASED TISSUE REGIONS USING ENVIRONMENTALLY SENSTIVE TRANSMEMBRANE PEPTIDE
    • 选择性分子分布或细胞标记细胞在ILL组织区域使用的敏感区域跨膜肽
    • EP1846014A2
    • 2007-10-24
    • EP06718899.5
    • 2006-01-18
    • The Board of Governors for Higher Education State of Rhode Island and Providence Plantations
    • RESHETNYAK, Yana, K.ANDREEV, Oleg, A.LEHNERT, UrsulaENGELMAN, Donald, M.
    • A61K38/00
    • C07K14/001A61K9/0019A61K47/64C07K14/215C07K2319/03
    • A polypeptide with a predominantly hydrophobic sequence long enough to span a membrane lipid bilayer as a transmembrane helix (TM) and comprising one or more dissociable groups inserts across a membrane spontaneously in a pH-dependant fashion placing one terminus inside cell. The polypeptide conjugated with various functional moieties delivers and accumulates them at cell membrane with low extracellular pH. The functional moiety conjugated with polypeptide terminus placed inside cell are translocated through the cell membrane in cytosol. The peptide and its variants or non-peptide analogs can be used to deliver therapeutic, prophylactic, diagnostic, imaging, gene regulation, cell regulation, or immunologic agents to or inside of cells in vitro or in vivo in tissue at low extracellular pH. The claimed method provides a new approach for diagnostic and treatment diseases with naturally occurred (or artificially created) low pH extracellular environment such as tumors, infarction, stroke, atherosclerosis, inflammation, infection, or trauma. The method allows to translocate cell impermeable molecules (peptides, toxins, drugs, inhibitors, nucleic acids, peptide nucleic acids, imaging probes) into cells at low pH. The method allows to attach to the cell surface a variety of functional moieties and particles including peptides, polysaccharides, virus, antigens, liposomes and nanoparticles made of any materials.
    • 具有显着疏水序列足够长以跨越一个膜脂双层的跨膜螺旋(TM)和包含一种或多种离解基团的多肽穿膜自发地插入以pH依赖的方式放置内小区的一个末端。 与各种官能部分缀合的多肽递送和在细胞膜具有低细胞外pH积累它们。 与细胞内放置的多肽缀合末端的官能部分通过细胞膜进入细胞质易位。 的肽及其变体或非肽类似物可用于递送治疗剂,预防,诊断,成像,基因调控,细胞调节,或免疫制剂或在体外或在低细胞外pH体内组织细胞的内部。 所要求保护的方法提供了用于诊断和治疗疾病的自然发生(或人工产生的)低pH胞外环境中的新方法:如肿瘤,梗塞,中风,动脉粥样硬化,炎症,感染,外伤或。 该方法允许易位细胞不可渗透的分子(肽,毒素,药物,酶抑制剂,核酸,肽核酸,成像探针)插入在低pH的细胞。 该方法允许附着到细胞表面的各种官能部分和颗粒,包括肽,多糖,病毒,抗原,脂质体和由任何材料制成的纳米颗粒。