A specific binding member that binds human ED-B, wherein the specific binding member is labelled with an isotope selected from the group consisting of
76
Br,
77
Br,
123
I,
124
I,
131
I and
211
At and comprises an antigen-binding site that comprises an antibody VH domain and an antibody VL domain, wherein the antibody VH domain is selected from the group consisting of the L19 VH domain, and a VH domain comprising a VH CDR1, a VH CDR2 and a VH CDR3, wherein the VH CDR3 is the L19 VH CDR3 of SEQ ID NO. 3, the VH CDR1 is optionally L19 VH CDR1 of SEQ ID NO. 1, and the VH CDR2 is optionally L19 VH CDR2 of SEQ ID NO. 2; and wherein the antibody VL domain is optionally selected from the group consisting of the L19 VL domain, and a VL domain comprising a VL CDR1, a VL CDR2 and a VL CDR3, wherein the VL CDR3 is the L19 VL CDR3 of SEQ ID NO. 6, the VL CDR1 is optionally L19 VL CDR1 of SEQ ID NO. 4, and the VL CDR2 is optionally L19 VL CDR2 of SEQ ID NO. 5; the L19 VH domain and L19 VL domain sequences being disclosed in Pini et al. (1998)
J. Biol. Chem
. 273: 21769-21776; wherein the specific binding member comprises a mini-immunoglobulin comprising said antibody VH domain and antibody VL domain fused to ε
S2
-CH4 and dimerized or comprises a whole IgG1 antibody molecule; also methods and uses employing such a specific binding member.
一种特定结合成员,结合人源ED-B,其中该特定结合成员标记有从76Br、77Br、123I、124I、131I和211At组成的同位素,并且包括一个抗原结合位点,该位点包括一个
抗体VH区域和一个
抗体VL区域,其中
抗体VH区域被选择于L19
VH区域和包括
VH CDR1、
VH CDR2和
VH CDR3的
VH区域之一,其中
VH CDR3是
SEQ ID NO. 3的L19
VH CDR3,
VH CDR1是可选的
SEQ ID NO. 1的L19
VH CDR1,
VH CDR2是可选的
SEQ ID NO. 2的L19
VH CDR2;
抗体VL区域可选自L19 VL区域和包括VL CDR1、VL CDR2和VL CDR3的VL区域之一,其中VL CDR3是
SEQ ID NO. 6的L19 VL CDR3,VL CDR1是可选的
SEQ ID NO. 4的L19 VL CDR1,VL CDR2是可选的
SEQ ID NO. 5的L19 VL CDR2;L19
VH区域和L19 VL区域序列在Pini et al. (1998) J. Biol. Chem. 273: 21769-21776中披露;其中特定结合成员包括将该
抗体VH区域和
抗体VL区域融合到ε
S2-
CH4并二聚化的小型免疫球蛋白,或包括整个IgG1
抗体分子;还涉及使用该特定结合成员的方法和用途。