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    • 4. 发明授权
    • High sensitivity immunoassay method
    • 高灵敏度免疫测定法
    • US07255998B1
    • 2007-08-14
    • US10089776
    • 2000-09-28
    • Kei TashiroTasuku HonjoMasaya IkegawaKazuko Matsumoto
    • Kei TashiroTasuku HonjoMasaya IkegawaKazuko Matsumoto
    • G01N33/53G01N33/532G01N33/533G01N33/24G01N21/76G01N33/547C07K1/10
    • G01N33/582G01N33/6863G01N2458/40Y10S435/968Y10S435/97Y10S435/975
    • A method for detecting a cytokine in a biological fluid sample with a high sensitivity is provided. A time-resolved fluoroimmunoassay (TR-FIA) method including a step of forming on a solid phase a composite in which a cytokine is captured and which includes a fluorescent structural portion which has been complexed with a lanthanoid metal ion, and measuring fluorescence of the fluorescent structural portion. The composite is formed of a structure in which (a) a first antibody including a portion bound to a solid phase and a region bindable to a cytokine; (b) the cytokine; (c) a second antibody including a region bindable to the cytokine and a portion to which biotin is bound; (d) a conjugate including streptoavidin or avidin and a fluorescent structural portion capable of being complexed with a lanthanoid metal ion; and (e) the lanthanoid metal ion are bound. The fluorescent structural portion is represented by General Formula (I): R—Ar—C(═O)—CH2—C(═O)—CnF2n—X.
    • 提供了一种以高灵敏度检测生物流体样品中的细胞因子的方法。 一种时间分辨荧光免疫测定(TR-FIA)方法,包括在固相上形成其中捕获细胞因子的复合物并包括与镧系元素金属离子络合的荧光结构部分的步骤,以及测量 荧光结构部分。 所述复合物由以下结构形成:其中(a)包含与固相结合的部分和与细胞因子结合的区域的第一抗体; (b)细胞因子; (c)包含与细胞因子结合的区域和生物素结合部分的第二抗体; (d)包含链霉亲和素或抗生物素蛋白的缀合物和能够与镧系金属离子络合的荧光结构部分; 和(e)镧系金属离子结合。 荧光结构部分由通式(I)表示:R-Ar-C(-O)-CH 2 -C(-O)-C N SUB> 2n -X。