ENGINEERING CELL TYPE SPECIFIC TOXINS

单克隆抗体选择性结合肿瘤细胞分化 抗原在体外和体内。 由于自然效应机制通常 不介导单克隆抗体结合细胞的杀伤， 将剧毒蛋白质与抗体连接的方法， 选择性地杀死肿瘤细胞。 我们已经成功地开发了几个 免疫毒素在体内应用的新方法。 (1)克隆毒素， 在基因水平上改变它们的结构， 毒性;（2）制备基因工程免疫毒素， 人类脑肿瘤患者的临床试验;（3）预防 用抗CD 4抗体对抗免疫毒素的免疫应答;（4）使用 人细胞毒性蛋白质，如与抗体连接的RNA酶， 选择性靶向细胞;（5）了解人类的机制 核糖核酸酶神经毒素; 6）发现核糖核酸酶阻断艾滋病毒感染， vivo.

Monoclonal antibodies selectively bind tumor cell differentiation antigens in vitro and in vivo. Since natural effector mechanisms often do not mediate killing of monoclonal antibody bound cells we have devised methods of linking extremely toxic proteins to the antibodies to selectively kill tumor cells. We have succeeded in developing several new approaches to apply immunotoxins in vivo. (1) Cloning toxins, then altering their structure at the gene level to decrease non target cell toxicity; (2) preparation of genetically engineered immunotoxins for clinical trials of human brain tumor patients; (3) prevention of an immune response against immunotoxin with anti-CD4 antibodies; (4) use of human cytotoxic proteins such as RNase linked to antibodies to selectively target cells; and (5) understanding the mechanism of human RNase neurotoxins; 6) Discovering that RNases block HIV infection in vivo.