TaqMan-MGB探针检测骨髓增殖性疾病患者JAK2V617F突变

目的 建立实时定量PCR检测骨髓增殖性疾病（MPD）患者JAK2V617F突变的方法。方法利用TaqMan-MGB探针,检测MPD患者JAK2V617F突变,部分标本用等位基因特异的定性PCR及测序的方法同时进行验证。结果 374份患者和对照的骨髓或外周血标本被用于JAK2V617F突变分析。其中76例PV、115例ET和19例MF患者JAK2V617F突变的检出率分别为70％、51％及58％;65例急性髓性白血病中仅1例为阳性,而38例慢性髓性白血病、30例急性淋巴细胞白血病、8例慢性淋巴细胞白血病、7例非霍奇金淋巴瘤及16例正常供者骨髓细胞中的检出率均为0。结论 JAK2V617F突变在我国MPD患者中是广泛存在的。利用TaqMan-MGB探针进行实时定量PCR的方法可快速、准确地检测JAK2V617F突变。

Detection of JAK2V617F mutation in patients with myeloproliferative disorders with TaqMan-MGB probe

OBJECTIVE: To develop a novel platform for detection of the JAK2V617F mutation in patients with myeloproliferative disorders (MPD) by real-time quantitative PCR. METHODS: TaqMan-MGB probe was constructed. Peripheral blood samples were collected from 374 MPD patients, 76 with polycythemia vera (PV), 38 with chronic myelogenous leukemia (CML), and 115 with essential thrombocythemia (ET), and 19 with idiopathic myelofibrosis (IMF). Peripheral blood samples from 65 patients with acute myelogenous leukemia (AML), 30 patients with acute lymphoblastic leukemia, 8 patients with chronic lymphoblastic leukemia, and 7 patients with non-Hodgkin's lymphoma and 16 cases of normal donor bone marrow were used as controls. Genomic DNA or RNA was extracted and reversely transcrtibed into cDNA. TaqMan-MGB probe was used to detect the JAK2V617F mutant in MPD. Furthermore, 168 specimens underwent allele specific PCR and 8 specimens underwent sequencing. This method was used on both DNA and cDNA specimens from 38 MPD patients simultaneously so as to test the consistency. RESULTS: The JAK2V617F mutation rates of the PV, ET, and IMF patients were 53 (70%), 59 (51%), (58%) respectively. JAK2V617F mutation was found in only one of the 65 AML patients and was not identified in other control specimens. Both the results of allele specific PCR and of sequencing were consistent with the result of TaqMan-MGB probe method. CONCLUSION: JAK2V617F mutation is widespread in Chinese MPD patients. Real-time quantitative PCR with TaqMan MGB probe can be used for rapid and accurate detection of the JAK2V617F mutation.