Objective: To investigate the diagnostic and prognostic implications of ATRX mutation and p53 mutation in patients with glioma. Methods: The clinicopathologic and molecular features of Chinese adult glioma patients, including diffuse and anaplastic astroastrocytoma with IDH mutation, oligodendroglioma and anaplastic oligodendroglioma with IDH mutation and 1p/19q co-deletion and diffuse astroastrocytoma with IDH wild type were reviewed and tested for ATRX loss expression and p53 overexpression. Results: Loss of ATRX expression was seen in 85.19% (23/27) diffuse and anaplastic astroastrocytoma with IDH mutation, higher than that of oligodendroglial tumors (0/53; P<0.01). Loss of ATRX expression was strongly linked to p53 overexpression(69.57%, 16/23). The patients who lost ATRX expression combined with normal p53 expression survived longer(P=0.013). Conclusions: ATRX mutation is a molecular marker for astrocytic tumors. ATRX mutation combined with p53 mutation can predict prognosis of patients with glioma.
目的： 探讨中国成人幕上胶质瘤中ATRX和p53基因突变在胶质瘤诊断及预后评估中的指导价值。 方法： 选择整合诊断为WHOⅡ级、Ⅲ级的星形细胞瘤，IDH突变型；弥漫性星形细胞瘤，IDH野生型；WHOⅡ级、Ⅲ级的少突胶质细胞瘤，IDH突变型伴1p/19q共缺失，合计83例。采用免疫组织化学染色法检测ATRX蛋白失表达及p53蛋白过表达情况。分析两者的相关性及其与患者总生存期的关系。 结果： WHOⅡ级、Ⅲ级星形细胞瘤，IDH突变型及WHOⅡ级、Ⅲ级少突胶质细胞瘤，IDH突变型伴1p/19q共缺失的病例中的ATRX失表达率为85.19%(23/27)和0(0/53，P<0.01)。在ATRX失表达病例中69.57%(16/23)同时存在p53过表达，二者密切相关(P<0.01)。生存分析结果提示存在ATRX失表达、p53阴性的患者的总生存期长(P＝0.013)。 结论： ATRX基因突变是较低级别星形细胞起源肿瘤的分子遗传特征之一，可以协助p53用于星形细胞瘤的诊断。ATRX联合p53基因突变检测可用于指导胶质瘤的预后评估。.
Keywords: Glioma; Prognosis; Tumor suppressor protein p53; X-linked alpha thalassemia mental retardation syndrome gene.