中国当代儿科杂志Issue(6)：619-623,5.DOI:10.7499/j.issn.1008-8830.2014.06.012
儿童非霍奇金淋巴瘤ZO-1基因甲基化状态分析及临床意义
ZO-1 gene methylation status and its clinical significance in children with non-Hodgkin lymphoma
摘要
Abstract
Objective To investigate the methylation status of zonula occludens-1 (ZO-1) gene promoter and its clinical significance in children with stage IV non-Hodgkin lymphoma (NHL) and to provide a basis for further etiological study and early diagnosis of this disease. Methods Fifty-ifve children with a conifrmed diagnosis of stage IV NHL (40 cases of T-NHL and 15 cases of B-NHL) were selected as the case group, and 20 children with diseases other than hematologic malignancies were selected as the control group. Bone marrow samples were collected from these subjects. Methylation-speciifc PCR (MS-PCR) was applied to evaluate the methylation status of ZO-1 gene promoter, and the integrated optical density (IOD) was determined. RT-PCR was used to measure the mRNA expression of ZO-1. Results MS-PCR showed that the methylated bands of ZO-1 gene promoter were found in 39 (70.9%) of 55 patients in the case group before treatment, while no ZO-1 gene promoter methylation was detected in the control group. With close tracking of 47 cases in the study group, consisting of 32 cases of T-NHL and 15 cases of B-NHL, the rates of ZO-1 gene promoter methylation prior to treatment were 72%and 67%, respectively, (P>0.572). The cases of T-NHL and B-NHL showed no signiifcant changes in methylation rate in the early and middle phases of chemotherapy (P>0.05), but they showed signiifcant changes in methylation rate in the late phase of chemotherapy (P<0.05). RT-PCR showed that the NHL cases carrying methylated ZO-1 gene had no mRNA expression of ZO-1, while all children in the control group had mRNA expression of ZO-1. There was no linear relationship between the total number of peripheral blood leukocytes and ZO-1 gene IOD (r=0.093, P=0.575);a positive correlation was found between the number of malignant cells in bone marrow and ZO-1 gene IOD (r=0.669, P<0.001). Conclusions ZO-1 gene shows a hypermethylation status in children with NHL, and the methylation level is positively correlated with the number of malignant cells in bone marrow. ZO-1 may be used as a novel molecular marker in early diagnosis, outcome assessment, prognostic evaluation, and detection of minimal residual disease.关键词
ZO-1基因/甲基化/非霍奇金淋巴瘤/儿童Key words
ZO-1 gene/Methylation/Non-Hodgkin Lymphoma/Child引用本文复制引用
刁玉巧,曲凡,杨明娟,孟建辉,朱秀丽,陈健..儿童非霍奇金淋巴瘤ZO-1基因甲基化状态分析及临床意义[J].中国当代儿科杂志,2014,(6):619-623,5.基金项目
河北省科技支撑计划项目（12277753）。 （）
