The present invention relates to selectively targeting tumoral vasculature in vivo using a human recombinant scFv, L19, to the angiogenesis marker ED-B domain of fibronectin. In preferred embodiments, a complete human IgG1 is employed having the variable regions of L19. In other embodiments is employed a mini-immunoglobulin generated by fusing the scFv L19 to the constant CH4 domain of a secretory IgE isoform that naturally contains a cysteine in its COOH terminal and which forms a covalently linked dimer. Different in vivo behaviour of the antibody formats is exploitable for different diagnostic and/or therapeutic purposes, depending on clinical needs and disease. The antibody molecules may be labelled as described.
本发明涉及使用人
重组 scFv L19 选择性地靶向体内肿瘤血管,该 scFv 与纤维粘连蛋白的血管生成标志物 ED-B 结构域相关。在优选的实施方案中,采用的是具有 L19 可变区的完整人 IgG1。在其他实施方案中,采用的是通过将 scFv L19 与分泌型 IgE 异构体的恒定
CH4 结构域融合而产生的迷你免疫球蛋白,这种分泌型 IgE 异构体在其 COOH 末端天然含有半胱
氨酸,并形成共价连接的二聚体。根据临床需要和疾病的不同,
抗体格式的不同体内行为可用于不同的诊断和/或治疗目的。
抗体分子可按描述进行标记。