Conseiller E, Debussche L, Landais D, Venot C, Maratrat M, Sierra V, Tocque B, Bracco L
Gene Medicine Department, Rhône-Poulenc Rorer SA, 94403 Vitry sur Seine Cedex, France.
J Clin Invest. 1998 Jan 1;101(1):120-7. doi: 10.1172/JCI1140.
The clinical potential of the p53 tumor suppressor gene is being evaluated currently for gene therapy of cancer. We have built a variant of wild-type p53, chimeric tumor suppressor 1 (CTS1), in which we have replaced the domains that mediate its inactivation. CTS1 presents some very interesting properties: (a) enhanced transcriptional activity; (b) resistance to the inactivation by oncogenic forms of p53; (c) resistance to the inactivation by MDM2; (d) lower sensitivity to E6-induced degradation; (e) ability to suppress cell growth; and (f ) faster induction of apoptosis. Thus, CTS1 is an improved tumor suppressor and an alternative for the treatment of wild-type p53-resistant human tumors by gene therapy.
目前正在评估p53肿瘤抑制基因在癌症基因治疗方面的临床潜力。我们构建了野生型p53的一个变体,即嵌合肿瘤抑制因子1(CTS1),其中我们替换了介导其失活的结构域。CTS1具有一些非常有趣的特性:(a)增强的转录活性;(b)对p53致癌形式介导的失活具有抗性;(c)对MDM2介导的失活具有抗性;(d)对E6诱导的降解敏感性较低;(e)抑制细胞生长的能力;以及(f)更快地诱导细胞凋亡。因此,CTS1是一种改良的肿瘤抑制因子,是通过基因治疗来治疗野生型p53抗性人类肿瘤的一种替代方案。