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), optionally with an albumin-binding peptide (ABP) sequence, are conjugated with one or more drug moieties (D) through a linker (L) to form cysteine engineered antibody-drug conjugates having Formula I: Ab-(L-D)p I where p is 1 to 4. Diagnostic and therapeutic uses for cysteine engineered antibody drug compounds and compositions are disclosed.
用非交联的高活性半胱
氨酸
氨基酸取代母体
抗体的一个或多个
氨基酸,就能设计出
抗体。
抗体片段也可以用一个或多个半胱
氨酸
氨基酸进行工程化,形成半胱
氨酸工程化
抗体片段(ThioFab)。本文提供了设计、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),可选择带有白蛋白结合肽(ABP)序列,通过连接体(L)与一种或多种药物分子(D)共轭,形成具有式 I 的半胱
氨酸工程
抗体-药物共轭物:Ab-(L-D)p I 其中 p 为 1 至 4。本研究公开了半胱
氨酸工程
抗体药物化合物和组合物的诊断和治疗用途。