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1.
Pan JL  Xue YQ  Jiang HY  Li TY  Wang Y  Qian J  Wu YF  Wu TQ 《中华内科杂志》2004,43(12):920-923
目的 分析伴有t(6 ;11) (q2 7;q2 3)急性白血病 (AL)的形态学、免疫学、细胞遗传学和临床特点。方法 采用骨髓细胞直接法或短期培养法制备染色体 ,用R显带技术进行核型分析 ;采用双色混合谱系白血病 (MLL)基因探针和间期荧光原位杂交 (FISH)技术 ,对其中 10例AL进行MLL重排检测 ;分别用异硫氰酸荧光素 (FITC)和得克萨斯红 (Texasred)标记的 6号和 11号全染色体涂抹探针对其中 5例标本进行染色体研究。结果 t(6 ;11)易位病例主要见于急性髓系白血病(AML) M5(8/ 11例 )。 11例t(6 ;11)AL中 9例初诊时WBC计数 (10~ 10 0 )× 10 9/L之间 ,9例有不同程度的肝、脾、淋巴结浸润。 9例为单纯t(6 ;11) ,2例伴有其他异常。进行免疫表型分析的 9例白血病中 4例髓系和淋系抗原共表达 ,除 1例外 ,其余患者均有CD3 4 表达。本组t(6 ;11)患者中位生存期为 6个月。 10例患者的双色FISH研究显示均有MLL重排 ,其中 5例标本的涂抹分析也证实 6号和 11号染色体之间发生了相互易位。结论 t(6 ;11)AL有着独特的临床特点 ,其预后不良。染色体涂抹和间期双色FISH技术是检测该易位和MLL重排的可靠手段。  相似文献   

2.
BACKGROUND AND OBJECTIVE: Rearrangements of the short arm of chromosome 12 have been described in different hematologic malignancies. Some of these abnormalities showed a rearrangement of the ETV6 gene. We studied the 12p region in one case with a t(8;12)(q12;p13) by fluorescence in situ hybridization (FISH). DESIGN AND METHODS: We have identified a chromosome translocation, t(8;12)(q12;p13) in two patients with myeloid disorders; one with acute myelogenous leukemia (AML) and one with refractory anemia (RA). FISH studies with specific probes (cosmids and YACs) for the 12p region were used to investigate one case. RESULTS: FISH studies demonstrated hemizygous loss of the ETV6 and CDKN1B regions and two copies of the CCDN2 locus, as a result of the balanced translocation and an additional copy of the der(8). INTERPRETATION AND CONCLUSIONS: Myeloid diseases with t(8;12)(q12;p13) have an interstitial deletion of 12p, including the ETV6 and CDKN1B regions. A duplication of CCDN2 locus can also be found.  相似文献   

3.
We report the case of a man with chronic myelocytic leukemia (CML) and a 46,XY,t(5;9;22) karyotype who developed acute myelocytic leukemia (AML) with a 45,X,t(8;21) karyotype 11 years after bone marrow transplantation (BMT) from his HLA-matched sister. Fluorescent in situ hybridization (FISH) studies and molecular analysis using short tandem repeat (STR) sequences proved the new leukemia to be of donor cell origin. Donor cell leukemia (DCL) after BMT is rare. Our review of the literature found 15 cases following BMT for leukemia and 2 cases after BMT for benign hematological disorders. In fewer than half the reported cases were molecular studies available to confirm the cytogenetic evidence for DCL, and the longest previously reported interval between BMT and DCL was 6 years.  相似文献   

4.
Wu W  Li JY  Shen YF  Cao XS  Qiu HR  Xu W 《中华内科杂志》2007,46(5):386-388
目的研究慢性髓细胞白血病(CML)中衍生9号染色体[der(9)]缺失的发生率及预后意义。方法随机选取48例CML-急变期(BC)患者,以BCR-ABL双色双融合荧光原位杂交(FISH)技术检测其染色体标本。对于FISH技术检测到的间期细胞中只有单个融合信号的标本,则观察其中期细胞,以明确是否为der(9)缺失。对于der(9)缺失患者,以相同方法检测其初诊时的染色体标本,以明确der(9)缺失是否和Ph易位同时发生。患者慢性期以羟基脲治疗。结果48例CML-BC患者中有8例(16.7%)der(9)缺失,其初诊时的染色体标本der(9)也缺失。der(9)缺失组慢性期及总生存期分别平均为20.9和36.4个月,明显短于未缺失组(55.1和70.3个月)(P〈0.05)。CML-BC急淋变与急非淋变患者中der(9)缺失概率无统计学意义(P〉0.05)。结论FISH技术可有效检测der(9)缺失。der(9)缺失与Ph易位同时发生。具有der(9)缺失的CML疾病进展较快,预后较差。羟基脲不具有逆转CML中der(9)缺失的不良预后的作用。der(9)缺失不导致cML向某一特定类型转化。  相似文献   

5.
Some cases of acute myeloid leukemia following organ transplant (PT-AML) have been published in the literature. We report the second case of acute promyelocytic leukemia (APL), which developed post-transplant and immunosuppressive treatment, in a 50-year-old male who had undergone a renal transplant. At diagnosis he presented typical t(15;17)(q12;q13) with additional abnormalities, including +8,t(13;22)(q12;q13) and an abnormal chromosome 1 which was better characterized by fluorescence in situ hybridization (FISH). He obtained cytological, karyotypic and molecular complete remission (CR) with induction treatment according to the all-trans retinoic acid + idarubican (AIDA) protocol; after 12 months, he relapsed (molecular relapse) and achieved molecular remission with all-trans retinoic acid (ATRA) plus mitoxantrone and cytosine arabinoside. After a further 14 months, he was treated with arsenic trioxide for cytological relapse and obtained a third CR; at the cytological relapse the karyotype showed 47,XY,+8, t(15;17)(q22;q21),t(13;22)(q12;q13),der(22)t(1;22)(p22;q13). He is alive 3.3 years after diagnosis of APL. Cyclosporin A (CsA) was given during all cycles of chemotherapy. We did not observe any severe infections or kidney failure during treatments. The use of conventional cytogenetic analysis plus FISH may identify complex karyotype also in transplanted patients receiving immunotherapy, and may also contribute to a better assessment of PT-AL.  相似文献   

6.
Trisomy 8 is a common anomaly in bone marrow (BM) cells of patients with myeloproliferative disorders (MPD), myelodysplastic syndromes (MDS), or acute nonlymphocytic leukemia (ANLL). We studied the efficacy of fluorescence in situ hybridization (FISH) detection of trisomy 8 in patients with MPD, MDS, or ANLL using directly labeled fluorescent alpha-satellite and whole chromosome paint (WCP) DNA probes specific for chromosome 8. Using FISH, we analyzed interphase nuclei and metaphase spreads from randomized series of BM specimens from normal individuals and patients with varying proportions of trisomy 8 as determined by conventional cytogenetic analysis. The BM of all normal donors contained less than or equal to 2.0% nuclei with 3 interphase FISH signals and less than or equal to 1 metaphase with 3 WCP FISH signals. Ninety-five percent and 98% of BM specimens with at least two metaphase cells with trisomy 8 by cytogenetic analysis contained greater than 2.0% nuclei with 3 interphase FISH and greater than 2 metaphases with 3 WCP FISH signals, respectively. Thirteen patients had 1 in 20 or 1 in 30 metaphase cells with trisomy 8 by conventional cytogenetic studies. Of these patients, four had greater than 2.0% nuclei with 3 interphase FISH signals. The BM of all four patients contained positive metaphase FISH results. We then studied the usefulness of FISH analysis to detect occult trisomy 8 by analyzing BM nuclei from 144 patients who had MPD, MDS, or ANLL and either 20 normal metaphase cells or an abnormal karyotype without trisomy 8. Seven patients had greater than 2.0% nuclei with 3 interphase FISH signals (range, 2.10% to 3.40%) and six patients had 2 or more cells with trisomy 8 upon metaphase FISH or extensive conventional cytogenetic analysis. Our results show that interphase and metaphase FISH analyses are useful methods to detect trisomy 8 cells in BM specimens, especially for specimens with normal or uncertain conventional cytogenetic results.  相似文献   

7.
Chromosome 8p11.2 translocations result in diverse oncogenic fusion genes involving FGFR1 or MYST3. Among 24,262 unique patient cytogenetic studies performed at the Mayo Clinic, 8p11.2 translocations were identified in 14 cases (~0.06%). FISH analysis was performed in 13 patients (12 had myeloid neoplasms) and revealed abnormalities of MYST3 (n = 4) or FGFR1 (n = 4) in eight patients. MYST3 abnormalities were associated with acute myeloid leukemia (AML), M4 in three and M6 in one. Three of the four FGFR1‐rearranged cases were associated with myeloproliferative neoplasms but none, including the two with sole 8p11.2, displayed the typical phenotype for stem cell leukemia/lymphoma (SCLL) and only one had eosinophilia; the fourth case had AML‐M4. FISH did not reveal FGFR1 involvement in the one patient with SCLL. We conclude that neither the SCLL phenotype nor blood eosinophilia is a consistent feature of FGFR1‐associated 8p11.2 translocations; conversely, FISH might not always reveal FGFR1 involvement in typical SCLL. Am. J. Hematol. 2010. © 2010 Wiley‐Liss, Inc.  相似文献   

8.
Fusion between the NUP98 and NSD3 genes in a patient with acute myeloid leukemia associated with t(8;11)(p11.2;p15), is reported for the first time. The t(8;11)(p11.2;p15) was identified by classical cytogenetics. Fluorescence in situ hybridization (FISH) analysis revealed a split signal with a mix of BAC 118H17 and 290A12, indicating the translocation disrupted NUP98. FISH restriction at 8p11-12 showed a split of BAC 350N15. Molecular investigations into candidate genes in this BAC showed the NUP98 fusion partner at 8p11.2 was the NSD3 gene. To date the NSD3 gene has never been implicated in hematologic malignancies.  相似文献   

9.
 In the present study we have used FISH to analyze the incidence of trisomy 8 in acute leukemias following either a primary myeloproliferative disorder (MPD) or a myelodysplastic syndrome (MDS) and correlated it with both the immunophenotype and the cell-cycle distribution of the leukemic blast cells. Six of the 21 (28%) acute leukemias studied displayed trisomy 8 by FISH. The number of trisomic cells in these cases ranged from 20 to 84%, with a mean of 46±24%. Trisomy 8 was associated with a homogeneous population of leukemic cells, phenotypically characterized by CD34+ / HLADR+ / CD13+ / CD33+ / CD11b– / CD15– / CD14–. No significant differences were observed on the proliferative rate of cases with trisomy 8, as compared with blast cells from the remaining patients. Overall, our findings suggest that in acute leukemias secondary to MPD or MDS, trisomy 8 is associated with a blockade of myeloid maturation at an early step of the differentiation process. Received: 2 December 1996 / Accepted: 12 February 1997  相似文献   

10.
目的:讨论霍奇金淋巴瘤伴急性粒-单核细胞白血病(AML-M4Eo)患者2种恶性血液系统疾病是否具有一定的相关性。方法:收集患者临床资料,骨髓细胞学,RT-PCR,FISH,查阅网络最新报道及数据库相关文献。结果:CBFβ/MYH11融合基因(+);染色体核型分析示47,XX,inv(16)(p13q22),+22;FISH inv(16)阳性率75%;免疫分型示HLA-DR、CD33、CD34、CD13、CD117、CD14等细胞相关抗原均为阳性,淋系明显受抑;2者尚未发现有交叉抗原及可能相关基因表达。结论:本例为来源于淋系干细胞和髓系干细胞2个不同克隆的细胞,2者之间并未有特定的联系。患者某种基因片段的不稳定性在外界某些因素如化疗和放疗等的诱导下引起突变,导致白血病的发生。  相似文献   

11.
BACKGROUND AND OBJECTIVES: The ETV6 gene undergoes rearrangements with tyrosine kinases in hematologic malignancies and solid tumors. ETV6/ABL1 chimeric proteins have been detected both in lymphoid and myeloid disorders. Our objective was to study two new cases of ETV6/ABL1-positive acute myeloid leukemia (AML) and to focus on bone marrow morphology and on molecular cytogenetics of eosinophilic cells. DESIGN AND METHODS: Fluorescence in situ hybridization (FISH) was performed in two AML cases with different translocations, i.e. t(8;12)(p21;p13) and t(9;12) (q34; p13). We used probes for the short arm of chromosome 12, for ABL1 and BCR, for centromeric regions, and for whole chromosome arms. Polymerase chain reaction (PCR) was carried out by applying primers selected for the ETV6 gene. RESULTS: In both cases, bone marrow morphology was characterized by trilineage dysplasia and increased abnormal eosinophils. FISH showed the 5'ETV6 translocated to chromosome 8 in patient #1, and to chromosome 9 in patient #2. A 3' PCR identified chimeric products resulting from fusion between ETV6 exon 4 or exon 5, and ABL1 exon 2. Accordingly, an ETV6/ABL1 fusion signal was detected on der(8) in patient #1, and on der(9) in patient #2. Using interphase FISH abnormal bone marrow eosinophils were proved to belong to the neoplastic clone, carrying the ETV6 rearrangement. INTERPRETATION AND CONCLUSIONS: Our findings provide new information on the heterogeneity of conventional cytogenetics in ETV6/ABL1 positive leukemias, and indicate the putative target cell in this AML is an immature precursor capable of terminally differentiating towards eosinophils.  相似文献   

12.
Dicentric (9;20) [dic(9;20)] is a rare recurring chromosome abnormality in leukemia patients. In this study, we report three adult patients with acute lymphoblastic leukemia (ALL) with dic(9;20) anomaly. All three patients were diagnosed as cluster of differentiation 10 (CD10) positive B cell ALL, achieved complete remission after induction chemotherapy, and died of leukemia relapse within 1 year after diagnosis. Specimens for chromosome analysis were prepared by direct method and/or short-time culture of bone marrow cells. Karyotyping was performed by R-banding technique. Dual-color fluorescence in situ hybridization (FISH) was performed using chromosome 9 and chromosome 20-specific centromeric probes. Karyotype analysis showed that all three patients had dic(9;20)(p11–13;q11), in which the dicentric nature of the derived chromosome was confirmed by interphase FISH. Dicentric (9;20)(p11–13;q11) may be specifically associated with ALL, and monosomy 20 may be a pointer to dic(9;20) in ALL. The prognostic significance of dic(9;20) in adult patients with ALL remains to be determined.  相似文献   

13.
14.
The objective of this study was to design DNA probe sets that enable the detection of chromosome aberrations in acute myeloid leukemia (AML) by interphase cytogenetics using fluorescence in situ hybridization (FISH) and to compare the results of interphase cytogenetics with those of conventional chromosome banding analysis. One hundred five consecutive patients with adult AML entered on a multicenter treatment trial were studied with a comprehensive set of DNA probes recognizing the most relevant AML-associated structural and numerical chromosome aberrations: translocations t(8;21), t(15;17), and t(11q23); inversion inv(16);chromosomal deletions (5q-, 7q-, 9q-, 12p-, 13q-, 17p-, and 20q- ); and chromosomal aneuploidies. Interphase cytogenetics was particularly sensitive for detecting the AML-specific gene fusions: 3 additional cases of inv(16) and 1 additional case of t(8;21) were identified by FISH that were missed by banding analysis, whereas equal numbers of t(11q23) and t(15;17) were detected. Five additional cases of trisomy 8q, 3 more cases of trisomy 11q, and 2 more cases of trisomies 21q and 22q were shown by FISH. These aberrations were either masked in complex karyo-types or identified in cases in which conventional banding analysis failed. On the other hand, the DNA probes selected were not informative to detect 1 case of 5q-, 9q-, and 20q-. In 5 cases, clonal aberrations were detected on banding analysis for which no FISH probes were selected. In conclusion, interphase cytogenetics proved to be more sensitive for detecting AML-specific chimeric gene fusions and some partial trisomies. Interphase cytogenetics provides a powerful technique complementary and, with further development of diagnostic DNA probes, even an alternative to chromosome banding studies for the cytogenetic analysis of AML.  相似文献   

15.
16.
Bentz  M; Cabot  G; Moos  M; Speicher  MR; Ganser  A; Lichter  P; Dohner  H 《Blood》1994,83(7):1922-1928
The presence of BCR-ABL fusion genes has important diagnostic and prognostic implications in chronic myeloid leukemia (CML) and acute lymphoblastic leukemia (ALL). The CML-specific chimeric BCR-ABL gene with a break involving the major breakpoint cluster region (M-bcr) of the BCR-gene has been detected by means of fluorescence in situ hybridization (FISH). In this study, we present a FISH protocol that allows the detection of breaks in both the major and the minor breakpoint cluster region (m-bcr). Three hybridization signals of D107F9, a yeast artificial chromosome (YAC)-derived probe spanning the breakpoint regions of the BCR gene, were indicative of the translocation events. To increase the specificity further, this probe was combined with cos-abl 8, a cosmid probe flanking the breakpoint within the ABL gene for dual-color hybridization. Samples of 21 patients with CML, the ALL-derived cell line SUP-B15, and of seven patients with Philadelphia chromosome (Ph1)-positive ALL (three of them with breakpoints within m-bcr) were examined. BCR-ABL fusion was detected in all cases with high specificity (false-positive nuclei: mean, 0.1%). On cytogenetic preparations, the percentages of BCR-ABL- positive interphase cells ranged from 53% to 91%. Comparable efficiencies were achieved on blood smears. In conclusion, hybridization with D107F9 and cos-abl 8 allows unambiguous diagnosis of BCR-ABL genes and is likely to become an important tool for the monitoring of therapies in patients with CML and ALL.  相似文献   

17.
18.
Du Q  Liu X  Song L  Meng F  Zhou S 《中华内科杂志》2002,41(12):801-804
目的 研究双色双融合探针间期荧光原位杂交技术(D-FISH)检测慢性髓系白血病(CML)微小残留病(MRD)的灵敏度,特异性及可重复性。方法 应用D-FISH探针对8例移植后或经供者淋巴细胞输注治疗获完全细胞遗传学缓解的CML患者骨髓内残留的微小肿瘤负荷水平进行检测,与应用单融合探针(S-FISH)进行了比较,同时就D-FISH与逆转录-聚合酶链反应(RT-PCR)结果的相关性进行了探讨。结果 D-FISH较S-FISH具有更高的灵敏度及特异性,可重复性好,正常对照组中D-FISH的正常分界值为0.570%,而S-FISH为5.686%。差异具有显著性;对8例移植后患者进行MRD检测S-FISH检测到3/8(37.5%)阳性,而D-FISH检测到5/8例(62.5%)阳性且结果与RT-PCR结果高度相关。结论 由于D-FISH具有较低的假阳性率与假阴性率,可应用于CML治疗后MRD的检测,但检测结果与临床参数的相关性有待进一步探讨。  相似文献   

19.
20.
We report a case of donor-derived acute myeloid leukemia (AML) occurring in a 33-year-old man after allogeneic bone marrow transplantation (BMT) for precursor T-cell acute lymphoblastic -leukemia (T-ALL). The cells for BMT were from his human leukocyte antigen (HLA)-matched sister. Fluorescence in-situ hybridization (FISH) analysis showed the AML to be of donor origin (i.e., karyotypically female) with an 11q23 (mixed lineage leukemia (MLL) gene) translocation, while the original T-ALL exhibited a male karyotype with abnormalities of chromosomes 6, 8, and a t(10;14)(q24;q11.2). Subsequent molecular short tandem repeat studies confirmed the AML to be of donor origin. Donor-cell leukemia (DCL) after allogeneic BMT is a rare, yet well-documented, event. Our report presents clinicopathologic information about a case of DCL and a review of the recent literature.  相似文献   

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