Antibodies are engineered by replacing one or more amino acids of a parent antibody with non cross-linked, highly reactive cysteine amino acids. Antibody fragments may also be engineered with one or more cysteine amino acids to form cysteine engineered antibody fragments (ThioFab). Methods of design, preparation, screening, and selection of the cysteine engineered antibodies are provided. Cysteine engineered antibodies (Ab) are conjugated with one or more zirconium complex (Z) labels through a linker (L) to form cysteine engineered zirconium-labeled antibody conjugates having Formula I:
Ab-(L-Z)
p
I
where p is 1 to 4. Imaging methods and diagnostic uses for zirconium-radiolabeled, cysteine engineered antibody conjugate compositions are disclosed.
抗体是通过将一个或多个亲缘
抗体的
氨基酸替换为非交联、高反应性的半胱
氨酸
氨基酸来设计的。
抗体片段也可以通过引入一个或多个半胱
氨酸
氨基酸来设计半胱
氨酸工程
抗体片段(ThioFab)。提供了设计、制备、筛选和选择半胱
氨酸工程
抗体的方法。半胱
氨酸工程
抗体(Ab)通过连接剂(L)与一个或多个
锆配合物(Z)标记结合,形成具有公式I的半胱
氨酸工程
锆标记
抗体结合物:Ab-(L-Z)pI,其中p为1至4。揭示了
锆放射标记、半胱
氨酸工程
抗体结合物组合物的成像方法和诊断用途。