凋亡相关基因pnas-2的表达谱分析

为了确定凋亡相关基因pnas-2在正常组织及急性白血病患者组织中的表达谱，应用Northernblot检测了pnas-2在心脏、脑、胎盘、肺、肝脏、骨骼肌、肾脏、胰腺、脾脏、淋巴结、胸腺、白细胞、骨髓和胎肝等组织中的表达，应用实时PCR（real—timePCR）和Northernblot检测了该基因在急性白血病44份初发、9份未缓解、27份缓解、12份复发样本中的表达，并检测了pnas-2在31例恶性肿瘤患者癌组织及正常组织中的表达。结果表明，pnas-2基因除了在胎盘中表达外，在其他检测的组织中均无表达。pnas-2基因在初发，未CR和复发急性白血病患者中的表达显著高于CR和癌肿患者的癌组织及正常组织中的表达。在7例急性白血病患者的自身前后对照中，pnas-2的表达变化与病程演变有关，即初发时高表达，未CR时无明显改变，但在CR时显著下降，复发时表达又上升。结论：pnas-2的高表达在急性白血病中是特异的，可能是一种癌基因，并很可能参与了白血病的发病。

Expression Spectra of Apoptosis-Related Gene pnas-2

To explore the expression spectra of apoptosis-related gene pnas-2 in normal tissues and acute leukemia (AL) patient tissues, the expressions of pnas-2 gene in tissues including heart, brain, placenta, lung, liver, skeletal muscle, kidney, pancreas, spleen, lymph node, thymus, leukocyte, bone marrow and fetal liver were detected by Northern blot. The expressions of pnas-2 in samples including 44 de novo, 9 non-CR, 27 CR and 12 relapsed AL patients were measured by real-time RT-PCR and Northern blot, and the expression levels of pnas-2 in normal and tumor tissues from 31 patients with malignancies were also detected. The results showed that pnas-2 was not expressed in the most tissues except in placenta. The results of real-time PCR indicated that pnas-2 expressions in samples of de novo, non-CR and relapsed patients ware significantly higher than that in CR, tumor tissues and normal tissues. In serial monitoring of 7 AL patients, the expression level of pnas-2 was high at first visit examination, but remarkably decreased after remission, and the pnas-2 expression level increased again when relapsed. It is concluded that the pnas-2 is specifically up-regulated in acute leukemia patients, which might be an oncogene and participate in leukemogenesis.