Wnt5a基因在血液病及白血病细胞株中的表达

本研究观察Wnt5a在部分血液病及白血病细胞株中的表达情况,为进一步研究Wnt5a在血液肿瘤中的作用及其机制打下基础。用人淋巴细胞分离液分离外周血和骨髓单个核细胞,以RT-PCR检测31例病例标本及3种白血病细胞株中Wnt5a的表达。结果表明:5例AML中4例均为阴性或弱阳性,仅1例完全缓解的病例表达呈强阳性。K562、HL-60细胞的Wnt5a表达也为阴性,Jurkat细胞的Wnt5a表达阳性。6例CML的Wnt5a表达均为阴性。4例ALL中3例为表达阳性或弱阳性,1例表达为阴性;2例CLL为阴性表达;2例MM中Wnt5a表达1例为弱阳性,1例为阴性;3例淋巴瘤中有1例为弱阳性,2例为阴性;2例AA、2例IDA、3例ITP、1例ET及PVWnt5a表达均为阳性或弱阳性。结论:在31例血液病标本及髓系白血病细胞株中,除ALL外,有明显的Wnt5a表达缺失或降低,而非恶性血液病例中Wnt5a表达普遍呈阳性,提示Wnt5a的表达下调可能与髓系白血病的发生有关。

Expression of Wnt5a Gene in Hematologic Diseases and Leukemic Cell Lines

This study was aimed to investigate the expression level of Wnt5a gene in some hematologic diseases and leukemic cell lines so as to provide a basis for further research of Wnt5a role and its mechanism in hematologic malignancies. The mononuclear cells of peripheral blood and bone marrow were isolated by human lymphocytic isolation solution. The expression of Wnt5a gene in specimen of 31 cases and three leukemic cell lines (Jurkat, K562, HL-60)were detected by RT-PCR. The results showed that in four out of five AML cases, negative or weak positive expressions were observed and negative expressions were observed also in K562 and HL-60 cells. Only in one AML case with complete remission and Jurkat cells the strong positive expressions were observed. The negative expression was observed in all six CML cases. In three out of four ALL cases, the expression was positive or weak positive and one negative. The expressions in two CLL cases were negative. Out of two MM cases, the expression in one was weak positive and in other was negative. Out of three lymphoma cases, the expression in one case was weak positive and in other two cases were negative. There were positive or weak positive expressions in two cases of AA, two cases of IDA, three cases of ITP, one cases of PV and ET cases. It is concluded that there have obvious down-regulated or lost expression of Wnt5a gene in 31 cases of hematologic disease and myelocytic leukemic cell lines except ALL samples. Nevertheless there have general positive expression of Wnt5a in cases of non-malignant hematologic diseases. These results suggest that the genesis of myelocytic leukemia is related to the down-regulated expression of Wnt5a.