实时荧光定量PCR检测细胞周期蛋白C在小儿急性淋巴细胞白血病中的表达

目的：应用实时荧光定量PCR（RQ-PCR）法检测人细胞周期蛋白C(CCNC)在儿童急性淋巴细胞白血病（ALL）中的表达，以探讨CCNC基因与儿童ALL的关系。方法：提取正常儿童、初治儿童ALL骨髓组织及ALL细胞系6T-CEM的总RNA并逆转录为cDNA，应用RQ-PCR法检测CCNC的表达。结果：在正常儿童、初治儿童ALL骨髓及6T-CEM细胞系的CCNC的阳性表达率均为100%，在正常儿童CCNC基因平均相对表达强度为13.5±0.30，而在初治儿童ALL中为2.35±0.83，两者比较有统计学意义（P＜0.05）。结论： CCNC在初治ALL患儿中低表达，提示其有可能是一个抑癌基因。

Detection of human cyclin C gene expression in childhood acute lymphocytic leukemia using real-time fluorescence quantitative PCR

OBJECTIVE: To explore the relationship between human cyclin C (CCNC) gene and childhood acute lymphocytic leukemia (ALL). METHODS: The total RNA isolated from myeloid tissues of normal children and of children with newly diagnosed ALL and from ALL cell line 6T-CEM was reversely transcribed into cDNA. Real-time fluorescence quantitative PCR method was used to detect CCNC gene expression. RESULTS: CCNC was expressed in myeloid tissues of normal children and of children with newly diagnosed ALL as well as 6T-CEM. The relative expression level of CCNC gene in children with newly diagnosed ALL was significantly lower than in normal controls (2.35 +/- 0.83 vs 13.5 +/- 0.30; P <0.05). CONCLUSIONS: CCNC gene shows lower expression in children with newly diagnosed ALL, suggesting that it may be a tumor suppressing gene in childhood ALL.