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    • 30. 发明授权
    • Target-sensitive immunoliposomes- preparation and characterization
    • 靶向敏感性免疫脂质体 - 制备和表征
    • US4957735A
    • 1990-09-18
    • US12321
    • 1987-02-09
    • Leaf Huang
    • Leaf Huang
    • G01N33/532G01N33/58
    • G01N33/532G01N33/586Y10S424/812Y10S436/829
    • Novel target-sensitive immunoliposomes were prepared and characterized. In this invention, target specific binding of antibody-coated liposomes was sufficient to induce bilayer destabilization, resulting in a site-specific release of liposome contents.Unilamellar liposomes were prepared by using a small quantity of palmitoyl IgG (pIgG) to stabilize the bilayer phase of the unsaturated phosphatidylethanol amine (PE) which by itself does not form stable liposomes. A mouse monoclonal IgG antibody to the glycoprotein D (gD) of Herpes Simplex Virus (HSV) and dioleoyl PE were used in one preferred embodiment.In another preferred embodiment, potentially cytotoxic antiviral drugs were entrapped in target sensitive (TS) immunoliposomes and delivered to HSV infected cells. Potency was as much as 1000 times superior to the free drug and cytotoxicity was decreased by as much as 3000 fold.
    • 制备和表征新的靶向敏感性免疫脂质体。 在本发明中,抗体包被的脂质体的靶特异性结合足以诱导双层不稳定,导致脂质体含量的位点特异性释放。 通过使用少量的棕榈酰IgG(pIgG)来制备单层脂质体以稳定不饱和磷脂酰乙醇胺(PE)的双相,其本身不形成稳定的脂质体。 在一个优选实施方案中,使用单克隆单克隆病毒(HSV)和二油酰PE的糖蛋白D(gD)的小鼠单克隆IgG抗体。 在另一个优选的实施方案中,潜在的细胞毒性抗病毒药物被包埋在靶敏感(TS)免疫脂质体中并被递送至HSV感染的细胞。 效力高达游离药物的1000倍,细胞毒性降低了3000倍。