第一部分 慢性中性粒細胞白血病臨床特征及基因突變的研究 第二部分 慢性粒單核細胞白血病基因突變的研究及預后意義
[Abstract]:Objective To investigate the clinical manifestations, morphology, cytogenetics, and gene mutation characteristics and prognosis of chronic neutrophil leukemia (CNL) patients.Methods 27 suspected patients with CNL were retrospectively diagnosed according to the WHO classification criteria in 2008. To determine the prognosis, JAK2 V617F mutation was detected by allele-specific polymerase chain reaction (AS-PCR), CSF3R exon 14-17, ASXL1 exon 12, SETBP1 exon 4, CALR exon 9 and MPL exon 10 were directly sequenced to identify the mutation type. Generation sequencing was used to analyze the mutations of 112 common genes in hematological malignancies. The clinical manifestations, morphology, cytogenetics and gene mutations of CNL patients were analyzed. Two patients were diagnosed as unidentified monoclonal immunoglobulin disease (MGUS) with CNL. The median age of onset was 64 (43-80) years in 16 patients with CNL, and 75 (12/16) in males. The median hemoglobin level at diagnosis was 114 (81-154) g/L. The median white blood cell count was 41.20 (26.05-167.70)*10 g/L, and the median platelet count was 238 (91-394)*109/L. The median percentage of peripheral blood immature granulocytes was 2 (0-9)%, the median percentage of peripheral blood primitive cells was 0 (0-0.5)%, the median percentage of bone marrow primitive cells was 1 (0-4.5)%, and the median level of bone marrow fibrosis was 1 (0-3). Except for 1 (1 (1,7) (p32, q11), 1 + 21 clonal abnormality. Among the 16 CNL patients, the detection rate of CSF3R T618I mutation was 100% (16/16), one with CSF3R W791X mutation, ASXL1 mutation was 81% (13/16), G646WfsX12 (8 cases), Y591X (2 cases), S871SfsX4 (1 case), R404X (1 case) and Q976X (1 case), respectively. 63% (10/16), according to the detection frequency, were D868N (4 cases), 1871T (3 cases), G870S (1 case), G870D (1 case) and D874N (1 case). There were 9 cases with CSF3R T618I, ASXL1 and SETBP1 mutations, 4 cases with CSF3R T618I and ASXL1 mutations, 1 case with CSF3R T618I and SETBP1 mutations, and 1 case without CSF3R T618I and SETBP1 mutations. Two patients had mutations in ASXL1 and SETBP1. In addition, only one patient with CALRK385fs * 47 mutation was obtained by direct sequencing. All CNL patients had no JAK2 V617F mutation and MPL mutation. One patient with CSF3RT618I mutation but did not meet the WHO (2008) CNL diagnostic criteria had mutations in SETBP1 but did not detect mutations in ASXL1, JAK2 V617. All the mutations were heterozygous except one G870S homozygous mutation found in SETBP1 gene. The ASXL1 mutation and SETBP1 mutation were compared with the corresponding wild type in terms of sex ratio, age distribution, hemoglobin level. There were no significant differences in white blood cell count, platelet count, peripheral blood immature granulocyte ratio, peripheral blood primitive cell ratio, bone marrow primitive cell ratio, and whether myelofibrosis was above grade 1. There was no correlation between ASXL1 mutation and SETBP1 mutation. The median survival time of 16 CNL patients was 26 (95% CI 20-32) months. After the survival data of the patients undergoing blood stem cell transplantation, we found that the prognostic factors of CNL patients were WBC (>50 *109/L) survival time was shorter than that of 50 *109/L patients (vs. 39 months in November, P = 0.005). Sex, age (>60 years old), anemia (anemia < 120g/L for men, 110g/L for women, P = 0.063), and ASXL1 protrusion. Conclusion 1. CSF3R T618I gene mutation can be used as the main criteria for the diagnosis of CNL. CNL patients are often associated with ASXL1 and SETBP1 gene processes. Chromosome karyotype abnormalities were not specific in myeloid tumors. Chromosome karyotype abnormalities were not a poor prognostic factor. 3. The median survival time of CNL patients was 26 months. WBC (>50 *109/L) at diagnosis was a poor prognostic factor. Methods 141 patients with CMML were retrospectively diagnosed according to WHO classification criteria in 2008. The prognosis was determined by follow-up. The mutations of ASXL1 exon 12, SETBP1 exon 4, TET2 exon 3-11 and SRSF2 exon 1 were detected by direct sequencing. Results The median age of 141 CMML patients was 63 (18-85) years, and 95 (67%) were male. The median hemoglobin level was 88 (43-166) g/L at diagnosis, and the median white blood cell count was 21.88 (3.01-117). 57 *109/L, median neutrophil absolute value was 7.07 (0.30-66.91) *109/L, median monocyte absolute value was 3.72 (1.02-57.72) *109/L, median platelet count was 78 (4-1001) *109/L. A total of 65 (46%) patients with CMML had mutations in the ASXL1 gene (only senseless mutations and frameshift mutations were considered to be mutations), 25 (18%) had mutations in the SETBP1 gene. 46 patients (33%) had mutations in TET2 gene and 41 patients (29%) had mutations in SRSF2 gene. The mutations in ASXL1 gene were mainly frameshift mutations, of which 59 were frameshift mutations (38 were G646WfsX12), 7 were nonsense mutations, and 1 was frameshift mutation and nonsense mutation. There were 22 frameshift mutations, 19 missense mutations and 7 nonsense mutations in TET2 gene. One patient had missense mutations and nonsense mutations. One patient had both missense, nonsense and frameshift mutations. SRSF2 mutations were mainly missense mutations, P95H, P95L, P95R and frameshift mutations. All of the above mutations were heterozygous. ASXL1 was associated with SETBP1 gene mutation. TET2 was associated with SRSF2 gene mutation. Compared with wild-type patients, patients with TET2 mutation had a higher proportion of age (> 65 years) and bone marrow primordial cells (> 10%). There was no significant difference in clinical characteristics between patients with SRSF2 mutation and those with wild type. Multivariate analysis showed that 141 patients with CMML survived, hemoglobin levels, and weeks. The presence or absence of IMCs and ASXL1 mutation were independent prognostic factors for CMML. According to the Mayo prognostic model, the median overall survival (MS) was not achieved in the low-risk group, 28 months in the medium-risk group and 18 months in the high-risk group. Month. A likelihood ratio test for the two prognostic score systems showed that the molecular Mayo prognostic model was superior to the Mayo prognostic model (-2 log likelihood ratio was 627 and 654 respectively, P = 0.001). The relative risk of ASXLlmut/TET2mut. The degree of mutation was 4.7 (95% CI 2.2-10.3; P = 0.000), 2.2 (95% CI 1.1-4.2; P = 0.025) and 1.3 (95% CI 0.6-2.5; P = 0.521). Conclusion 1. The mutation frequencies of ASXL1, SETBP1, TET2 and SRSF2 genes in CMML patients were 46%, 18%, 33% and 29%, respectively. ASXL1 mutation is an independent and unfavorable prognostic factor for the overall survival of CMML patients. Incorporating ASXL1 mutation into the prognostic score system helps to better distinguish the prognostic risk. 4. TET2 mutation was detected in CMML patients with ASXL1 mutation, suggesting worse prognosis. Prognosis.
【學位授予單位】:北京協和醫(yī)學院
【學位級別】:博士
【學位授予年份】:2016
【分類號】:R733.72
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