以新视角观察p53家族在肺癌发生及治疗中的独特作用

P53 Family Proteins Provide New Insights into Lung Carcinogenesis and Clinical Treatment

P53作为转录因子,其转录激活功能维持了基因组的稳定性,对防止肿瘤的形成起着重要作用,是目前研究得最为广泛、深入的抑癌基因,被称为"基因卫士"。P53家族的成员p63、p73与p53在DNA结合结构域上有高度的同源性,某些p53家族亚型可以与p53-反应基因相结合起着转录激活的作用,另外一些则起着负性调节作用。肺癌是世界上患病率最高的恶性肿瘤之一,p53家族成员在肺癌中的异常表达与肺癌的发生有密切联系,并导致不良的预后及对放疗、化疗的抵抗。对p53家族成员在肺癌致病机制的深入研究可有助于为临床提供合理的化疗方案及靶向治疗策略。本文着重回顾总结p53家族成员在肺癌发生、化疗敏感性以及肺癌靶向治疗中的独特的作用。

The transcription activation of p53 plays an important role in the maintenance of genetic stability. P53 is an intensive study tumor suppressor, which has been called the ＂gene guider＂. The p53 family members p63, p73 have high homologous sequence with p53. Some of them can bind to the p53-responsive genes and transcript the downstream genes. Human lung cancer is one of the most common malignant tumors in the world. Abnormality of the p53 gene is the significant event in lung cancers, which leads to the poor prognosis and the resistance of chemotherapy. A deep understanding of the rela- tionship between p53 family members and lung cancers can provide a more reasonably targeted clinical approach. This paper will focus on the special function of pS3 family members in the development, chemosensitivity and target treatment of lung cancer,