The integrin is a family of membrane receptor proteins composed of heterologous dimer , it can identify the sequence RGD .Integrin excessive expressed in tumor cells and angiogenesis .Using their special relationship a-mong them, the RGD as the carrier, combined with the radioactive tracer , antineoplastic drugs and other substances,which has tumoraffin imaging ,targeted anticancer therapy ,anti-inflammatory,anti depression effect and bone and nerve repair , and so on .%整合素是一个异源二聚体组成的膜受体蛋白家族,能特异性识别精氨酸-甘氨酸-天冬氨酸(RGD)序列.整合素在肿瘤细胞和新生血管高表达.利用它们3者之间特殊关系,将RGD作为载体,与放射性示踪剂、抗肿瘤药物以及其他物质结合,使其具有亲肿瘤显像、靶向抗肿瘤治疗、抗感染、抗抑郁和骨骼及神经修复等作用.
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