骨髓形态学染色联合荧光原位杂交技术在急性白血病鉴别诊断中的应用

目的 探讨联合骨髓形态学染色和荧光原位杂交(MGG-FISH)技术在Ph染色体阳性急性淋巴细胞白血病(Ph+ALL)和慢性粒细胞白血病急性淋巴细胞白血病变(CML-LBC)鉴别诊断中的临床应用价值.方法 应用BCR(绿色)和ABL(橘红色)双色双融合探针,通过MGG-FISH技术对4例Ph+ALL患者、4例CML-LBC患者、1例CML急性白血病变合并淋巴瘤、1例CML急性混合细胞白血病变患者的骨髓涂片标本进行检测,依据形态学分别检测10份标本红细胞系、粒细胞系和淋巴细胞系的BCR/ABL融合信号阳性细胞百分率.结果 通过MGG-FISH方法分析,4份Ph+ALL骨髓标本红细胞系未累及,BCR/ABL融合信号阳性细胞百分率均为0%;粒细胞系阳性率分别为11%(1/9)、8%(1/12)、0%(0/8)、10%(1/10);淋巴细胞系阳性率分别为97%(76/78)、98%(87/89)、98%(97/99)、97%(75/77).4份CML-LBC骨髓标本红细胞系阳性率分别为100%(8/8)、91%(10/11)、82%(9/11)、88%(7/8);粒细胞系阳性率分别为89%(8/9)、96%(94/98)、100%(47/47)、98%(40/41);淋巴细胞系阳性率分别为96%(78/81)、93%(52/56)、96%(68/71)、95%(58/61).其余2份标本阳性率均超过80%,且通过MGG-FISH分析鉴定了恶性克隆的来源.结论 MGG-FISH技术可以准确、快速地对原发性Ph+ALL和CML-LBC进行鉴别,并可进行克隆源性分析.     

FTY720, a new alternative for treating blast crisis chronic myelogenous leukemia and Philadelphia chromosome-positive acute lymphocytic leukemia

Blast crisis chronic myelogenous leukemia (CML-BC) and Philadelphia chromosome-positive (Ph1-positive) acute lymphocytic leukemia (ALL) are 2 fatal BCR/ABL-driven leukemias against which Abl kinase inhibitors fail to induce a long-term response. We recently reported that functional loss of protein phosphatase 2A (PP2A) activity is important for CML blastic transformation. We assessed the therapeutic potential of the PP2A activator FTY720 (2-amino-2-[2-(4-octylphenyl)ethyl]-1,3-propanediol hydrochloride), an immunomodulator in Phase III trials for patients with multiple sclerosis or undergoing organ transplantation, in CML-BC and Ph1 ALL patient cells and in in vitro and in vivo models of these BCR/ABL+ leukemias. Our data indicate that FTY720 induces apoptosis and impairs clonogenicity of imatinib/dasatinib-sensitive and -resistant p210/p190(BCR/ABL) myeloid and lymphoid cell lines and CML-BC(CD34+) and Ph1 ALL(CD34+/CD19+) progenitors but not of normal CD34+ and CD34+/CD19+ bone marrow cells. Furthermore, pharmacologic doses of FTY720 remarkably suppress in vivo p210/p190(BCR/ABL)-driven [including p210/p190(BCR/ABL)(T315I)] leukemogenesis without exerting any toxicity. Altogether, these results highlight the therapeutic relevance of rescuing PP2A tumor suppressor activity in Ph1 leukemias and strongly support the introduction of the PP2A activator FTY720 in the treatment of CML-BC and Ph1 ALL patients.     

达沙替尼治疗伊马替尼耐药的BCR/ABL阳性白血病的临床研究

本研究评价达沙替尼治疗原发或继发伊马替尼耐药的BCR/ABL阳性白血病的疗效和安全性。对27例原发或继发伊马替尼耐药的慢性髓系白血病(CML)或Ph阳性急性淋巴细胞白血病(Ph+ALL)患者,给予达沙替尼100-140 mg/d口服治疗,评估疗效、总体生存和耐受情况。结果表明:27例伊马替尼耐药的BCR/ABL阳性白血病中位达沙替尼治疗时间8(1-66)个月,中位随访时间54(3-75)个月。27例接受达沙替尼治疗的患者中,88.8%获得完全血液学反应(CHR),44.4%获得主要细胞遗传学反应(mCyR),37%获得完全遗传学反应(CCyR),18.5%获得主要分子学反应(MMR)。伊马替尼耐药的进展期(CML-AP、CML-BC、骨髓复发Ph+ALL)患者接受达沙替尼治疗获CCyR率低于疾病稳定期(CML-CP、骨髓缓解Ph+ALL)患者(P=0.0377),且3-4级不良反应发生率明显增高。达沙替尼治疗后获得CCyR的患者生存期(OS)较未达CCyR者明显延长(63个月vs 9个月,P=0.0126)。达沙替尼治疗后最常见的3-4级不良反应包括血液学反应如血小板减少(51.8%)、中性粒细胞减少(48.1%)、贫血(33.3%)和非血液学反应如胸腔积液(18.5%)、肺部感染(18.5%)、心包积液(11.1%)。3-4级不良反应主要发生在疾病进展期时改服达沙替尼者,均发生于服药12个月内。结论:达沙替尼治疗伊马替尼耐药的BCR/ABL阳性白血病有效,且在疾病稳定期改服达沙替尼疗效和耐受性更好。     

CD25在急性B淋巴细胞白血病中的表达及其临床意义探讨

本研究旨在通过流式细胞术标记CD25,探讨其与急性B淋巴细胞白血病（B—ALL）的关系及其临床意义。选择88例初发B—ALL患者骨髓,应用流式细胞术检测免疫表型标记,包括白介素2受体α链（CD25）、B链（CD122）、Y链（CD132）,CD19、CD20、CD10、CD34、CDIgM、CD79a、CD22、CDTDT;用定性PCR方法检测BCR／ABL融合基因表达,实时定量PCR检测IL2RA（CD25基因）的表达。结果表明,CD25＋和CD25-的B—ALL患者白细胞计数（WBC）、血红蛋白（Hb）、血小板（Plt）、骨髓原始细胞比例（marrowblast％）、外周血原始细胞比例（peripheralblast％）、肝脾和淋巴结肿大、cD10、cD20、cD22、cD34、CD79a、CDTDT、CDIgM表达水平差别均无统计学意义（P〉0．05）,而CD19在CD25＋组中表达水平高于CD25-组（P〈0．05）。本组BCR／ABL＋患者为21例（23．9％,21／88）,CD25＋表达率为66．7％（14／21）;BCR／ABL-患者为67例,CD25＋表达率为4．5％（3／67）,两组间差别有统计学意义（P〈0．05）。IL2RA基因mRNA表达水平在CD25＋和CD25-两组间无统计学差异（P〉0．05）。21例BCR／ABL＋B—ALL患者中,CD25＋与CD25-两组间在缓解率和复发率方面差异无统计学意义（P〉0．05）。BCR／ABL＋B—ALL患者中有8例复发,复发率为38．1％（8／21）,BCR／ABL。组有9例复发,复发率为13．4％（9／67）,两组间差异有统计学意义（P〈0．05）。BCR／ABL＋组无复发生存时间（relapse—freesurvival,RFS）为21个月,BCR／ABL＋CD25＋患者RFS时间为15个月,而BCR／ABL＋CD25-患者RFS时间为21个月,BCR／ABL—CD25-患者RFS时间为24个月。结论：CD25在BCR／ABL＋B-ALL上患者中呈高水平表达,可以作为B—ALL的BCR／ABL融合基因表达的预测指标,与疾病复发有关,CD25＋可以作为判断B—ALL不良预后的辅助标志。     

The P190, P210, and P230 forms of the BCR/ABL oncogene induce a similar chronic myeloid leukemia-like syndrome in mice but have different lymphoid leukemogenic activity

The product of the Philadelphia chromosome (Ph) translocation, the BCR/ABL oncogene, exists in three principal forms (P190, P210, and P230 BCR/ABL) that are found in distinct forms of Ph-positive leukemia, suggesting the three proteins have different leukemogenic activity. We have directly compared the tyrosine kinase activity, in vitro transformation properties, and in vivo leukemogenic activity of the P190, P210, and P230 forms of BCR/ABL. P230 exhibited lower intrinsic tyrosine kinase activity than P210 and P190. Although all three oncogenes transformed both myeloid (32D cl3) and lymphoid (Ba/F3) interleukin (IL)-3-dependent cell lines to become independent of IL-3 for survival and growth, their ability to stimulate proliferation of Ba/F3 lymphoid cells differed and correlated directly with tyrosine kinase activity. In a murine bone marrow transduction/transplantation model, the three forms of BCR/ABL were equally potent in the induction of a chronic myeloid leukemia (CML)-like myeloproliferative syndrome in recipient mice when 5-fluorouracil (5-FU)-treated donors were used. Analysis of proviral integration showed the CML-like disease to be polyclonal and to involve multiple myeloid and B lymphoid lineages, implicating a primitive multipotential target cell. Secondary transplantation revealed that only certain minor clones gave rise to day 12 spleen colonies and induced disease in secondary recipients, suggesting heterogeneity among the target cell population. In contrast, when marrow from non- 5-FU-treated donors was used, a mixture of CML-like disease, B lymphoid acute leukemia, and macrophage tumors was observed in recipients. P190 BCR/ABL induced lymphoid leukemia with shorter latency than P210 or P230. The lymphoid leukemias and macrophage tumors had provirus integration patterns that were oligo- or monoclonal and limited to the tumor cells, suggesting a lineage-restricted target cell with a requirement for additional events in addition to BCR/ABL transduction for full malignant transformation. These results do not support the hypothesis that P230 BCR/ABL induces a distinct and less aggressive form of CML in humans, and suggest that the rarity of P190 BCR/ABL in human CML may reflect infrequent BCR intron 1 breakpoints during the genesis of the Ph chromosome in stem cells, rather than intrinsic differences in myeloid leukemogenicity between P190 and P210.     

慢性髓系白血病Ph染色体分析与bcr/abl mRNA检测

目的 为进一步明确慢性髓系白血病（ＣＭＬ）患者中Ｐｈ染色体阳性细胞与ｂｃｒ／ａｂｌ融合基因表达之间的关系和比较细胞遗传学分的与聚合酶链反应（ＰＣＲ）方法在ＣＭＬ应用中的优缺点,方法 用热变性姬姆萨Ｒ显带（ＲＨＧ）技术和逆转录筑巢式聚合酶链反应（ＲＴ－ｎｅｓｔ－ＰＣＲ）对３３例ＣＭＬ患者的骨髓或外周血进行了分析,对其中１１例异基因骨髓移植（Ａｌｌｏ－ＢＭＴ）或α干扰素（ＩＦＮ－α）＋小剂量羟基脲（Ｈ     

BCR/ABL探针在骨髓增殖性疾病中的临床运用

本研究通过回顾分析荧光原位杂交(FISH)检测BCR/ABL融合基因结果,探讨其在慢性骨髓增殖性疾病(CMPD)和Ph+急性淋巴细胞白血病(Ph+ALL)的鉴别诊断及治疗后微小残留病(MRD)动态监测中的运用价值。初诊和治疗后病例分别使用BCR/ABL(ES)和BCR/ABL(DF)探针检测BCR/ABL融合基因。结果表明:初诊CMPD 49例,形态学符合CML骨髓象28例,确诊CML 23例,形态符合率23/28(82.1%),BCR/ABL阳性23/23,敏感度、特异度均为100%。确诊病例BCR/ABL阳性细胞率为81.3%±17.7%;allo-HSCT 13例,9例长期无病生存,4例复发,经供者淋巴细胞输注(DLI)、伊马替尼或allo-HSCT治疗后多次监测BCR/ABL阴性;伊马替尼治疗16例,其中11例于1年后多次监测BCR/ABL阴性,5例分别于6、7、10年后监测BCR/ABL阳性,其中1例经allo-HSCT成功,BCR/ABL转阴。结论:FISH技术是一项敏感、特异的诊断技术,针对初诊和治疗后病例分别运用两种不同的探针检测BCR/ABL融合基因,有助于准确、快速鉴别诊断CML、Ph+ALL,动态监测酪氨酸激酶抑制剂治疗和allo-HSCT后MRD。     

PY20抗体检测bcr-abl阳性细胞内磷酸化酪氨酸的临床应用

目的探讨酪氨酸磷酸化抗体 PY20检测 bcr-abl 阳件细胞的特异性及其可能的临床应用。方法采用多色直接免疫荧光标记方法,同时标记膜 CD45和胞质 PY20抗体,应用流式细胞术检测 bcr-abl 阳性细胞系(K562、MEG-01)和阴月性细胞系(Jurkat、MCF-7)的酪氨酸磷酸化水平。并利用bcr-abl 蛋白酪氨酸磷酸化特异性阻断剂伊马替尼作用 K562细胞和 MEG4-01细胞,观察 PY20抗体的特异性。检测了49例白血病患者和3名正常人的骨髓细胞,包括慢性粒细胞白血病(CML)、Ph~+急性淋巴细胞白血病(Ph~+ ALL)、Ph~- ALL、急性髓系白血病、慢性淋巴细胞白血病。PY20~+细胞占白血病细胞群的10%以上定义为阳忡。以阳性细胞的平均荧光强度(MFI)表示其酪氨酸磷酸化水平。结果bcr-abl 阳性细胞系、10例初诊 CML 和8例 Ph~+ALL 患者 PY20抗体均为阳性,而 bcr-abl 阴性细胞系、20例 bcr-abl 阴性白血病患者和3名正常人 PY20抗体均为阴性。伊马替尼作用后 K562细胞和MEG-01细胞的酪氨酸磷酸化水平随作用时间的延长逐渐下降。10例初诊和9例伊马替尼治疗有效的 CML 患者 PY20~+细胞占有核细胞的比例分别为(54.20±19.82)%和(14.84±6.17)%(P<0.05),而2例伊马替尼耐药者 PY20~+细胞比例分别为64.3%和57.2%。2例伊马替尼耐药患者和9例伊马替尼治疗有效患者的 CML 细胞的 MFI 分别为99.42±4.87和46.41±4.67(P<0.01)。结论酪氨酸磷酸化抗体 PY20对 bcr-abl 阳性细胞具有相对特异性,有可能应用于 bcr-abl 阳性疾病如 CML 和Ph~+ALL 的早期快速辅助诊断,同时有可能作为判断该类疾病对伊马替尼敏感性的一个辅助指标。     

Ph阳性慢性粒细胞白血病患者伊马替尼治疗后的Ph阴性异常克隆演变

目的观察Ph阳性慢性粒细胞白血病(Ph+CML)患者在伊马替尼治疗后的Ph阴性异常克隆演变(Ph-CE)。方法对100例伊马替尼单药治疗有效的Ph+CML患者(其中干扰素治疗失败的慢性期患者54例、加速期患者37例、急变期患者9例)在治疗前及治疗后18～30个月内定期监测其细胞染色体核型变化(G显带方法)。结果11例(11%)患者于治疗后3～29个月一过性、间断或连续检出Ph-CE,其中慢性期患者5例、加速期患者5例、急变期患者1例。Ph-CE见于Ph+克隆开始减少时或在Ph+克隆消失之后,同期Ph-CE细胞的比例与Ph+细胞的比例呈负相关(P<0.05)。Ph-CE多为+8(5例,45.5%)和+Y(3例,27.3%),5例患者同时伴有Ph+细胞染色体附加异常。Ph-CE者中,7例获得主要遗传学缓解,9例获得完全血液学缓解。在观察期内,1例加速期患者在持续治疗20个月时进展至急变期。结论Ph+CML患者经伊马替尼治疗后获得不同程度遗传学缓解时约11%被检出Ph-CE,但在随访期内大多数患者未显示病情进展。     

慢性髓系白血病急变期分子遗传学研究进展

9号和22号染色体相互易位产生Ph染色体及BCR-ABL融合基因,几乎在所有慢性髓系白血病（CML）出现,BCR-ABL编码的蛋白具有持续增高的酪氨酸激酶活性,使白血病细胞异常增殖。急变期是CML的晚期,在此期间常常出现其它附加染色体和分子的改变。大量研究表明,BCR-ABL基因与其他失调的基因共同作用并异常激活下游的信号传导通路,促进了疾病的进展。酪氨酸激酶抑制剂伊马替尼对大多数慢性期CML患者治疗效果显著。IRIS5年的临床试验显示：用伊马替尼治疗的98%患者达血液学完全缓解,92%患者达主要细胞遗传学缓解,87%患者达完全细胞遗传学缓解。然而,仍有少数慢性期和大多数进展期患者用伊马替尼治疗疗效欠佳。在耐药机制的研究中发现ABL激酶区点突变与临床耐药关系密切。第二代酪氨酸激酶抑制剂可改善伊马替尼耐药,本文就急性变的分子机制、伊马替尼耐药等做一综述。     

荧光原位杂交技术检测BCR/ABL融合基因

目的建立荧光原位杂交(FISH)技术,直接原位检测间期细胞中BCR/ABL融合基因,辅助临床诊断和治疗慢性粒细胞性白血病(CML)。方法应用FISH技术检测15例CML患者骨髓培养细胞BCR/ABL融合基因,其中5例CML患者同时取骨髓直接涂片检测,5例CML患者同时取外周血浓缩单个核细胞直接涂片检测。以5例非CML患者骨髓培养细胞为阴性对照。结果15例患者骨髓标本成功培养10例,染色体分析检测到Ph1染色体8例。15例患者骨髓培养细胞FISH检测BCR/ABL融合基因阳性14例。5例CML患者同时做骨髓直接涂片FISH检测,结果阳性4例。5例CML患者同时做血标本浓缩单个核细胞FISH检测阳性2例。5例非CML患者FISH结果均阴性。结论FISH技术能直接原位检测间期细胞中BCR/ABL融合基因,且快速、可靠、成功率高,是诊断和监测CML的一项有效新技术。     

Ph1-positive leukemia: cytogenetic outline and prognosis]

Ph1-positive leukemias consist of acute leukemia (Ph1 AL) and CML. Cytogenetically, Ph1 AL is often associated with +6, -7, +8, +21, or +Ph1. CML is predominantly accompanied by +Ph1, +8, i (17q), +19 in myeloid crisis and +Ph1, +8, +21 in lymphoid crisis. Thus, i(17q) seems specific for myeloid crisis of CML. Ph1 constricts ABL/BCR within M-BCR in CML and in one half of the adult Ph1 AL. BCR breaks upstream to M-BCR in the other half of adult AL and in most of childhood AL. However, the breakpoint does not affect clinical and hematological features in AL. Consequently, there seems to be two types of Ph1 leukemia; one is AL representing m-BCR rearrangement and the other is CML and Ph1 AL showing M-BCR rearrangement.     

Chronic myeloid leukemia: current perspectives

Chronic myeloid leukemia (CML), characterized by the t(9;22) and BCR/ABL1 fusion, is a disease model for studying the mechanisms of genetic abnormalities in leukemogenesis. The detection of the t(9;22), characterization of the BCR/ABL fusion, and the discovery of imatinib have elegantly reflected the success of our research efforts in CML. However, genomic instabilities that lead to the formation of the BCR/ ABL1 fusion are not fully understood. It is important to understand how various genes that are involved in regulating the signaling pathway and epigenetic deregulation cooperate with the BCR/ABL1 fusion in the initiation and progression of CML.     

RHBDD1基因在慢性髓系白血病患者骨髓细胞中的表达及临床意义

本研究旨在检测RHBDD1（Rhomboid domain containing 1）基因在慢性髓系白血病（CML）患者骨髓细胞中的表达水平并初步探讨其临床意义。采用实时定量PCR的方法检测RHBDD1在正常人和CML患者骨髓单个核细胞中的相对表达水平。结果表明,CML患者RHBDD1的表达水平明显高于正常人;BCR／ABL p210表达阴性的患者RHBDD1的表达水平显著高于BCR／ABLp210阳性的患者;≥50岁的患者RHBDD1表达水平低于〈50岁的患者;RHBDD1的表达水平与患者的性别无明显相关性。结论：RHBDD1基因可能参与了CML的发生与发展,尤其在BCR／ABL p210阴性患者的发病中可能发挥重要作用。     

荧光原位杂交技术检测BCR/ABL融合基因的临床应用

本研究探讨应用荧光原位杂交技术( FISH)检测BCR/ABL融合基因在临床中的应用价值.对初诊考虑为慢性骨髓增殖性疾病或骨髓增生异常/骨髓增殖性疾病的患者、急性淋巴细胞白血病患者及异基因造血干细胞移植后的慢性髓系白血病(CML)患者,行骨髓细胞学检查并用FISH法检测BCR/ABL融合基因.结果表明:①46例在初诊时考虑为慢性骨髓增殖性疾病或骨髓增生异常/骨髓增殖性疾病的患者中,有22例患者诊断为CML,应用FISH法检测BCR/ABL融合基因均为阳性(100％),骨髓细胞学检查显示CML者占86.4％ (19/22);另24例患者诊断为非CML的慢性骨髓增殖性疾病及骨髓增生异常/骨髓增殖性疾病,FISH法检测BCR/ABL融合基因均为阴性(100％),而骨髓细胞学检查有3例支持CML诊断、1例支持MDS诊断;②7例急性淋巴细胞白血病患者,有3例FISH法检测BCR/ABL融合基因为阳性;③2例异基因造血干细胞移植后的CML患者,应用HSH法检测BCR/ ABL融合基因可检测到阳性细胞(分别为6.5％及1.2％).结论:FISH法检测BCR/ABL融合基因敏感、可靠,对慢性骨髓增殖性疾病及骨髓增生异常/骨髓增殖性疾病的诊断及鉴别诊断有重要价值;可明确Ph+急性淋巴细胞白血病患者的诊断;在CML患者行异基因造血干细胞移植后监测微小残留病灶方面也有重要意义.     

甲磺酸伊马替尼治疗慢性髓系白血病的临床研究及血药浓度监测

目的 观察甲磺酸伊马替尼(IM)治疗慢性髓系白血病(CML)的疗效,并分析血浆药物谷浓度水平与临床疗效及不良反应的关系.方法 观察101例CML患者接受IM治疗的疗效,并采用液相色谱-串联质谱法检测其中30例CML-慢性期(CP)患者IM血浆药物谷浓度.结果 ①89例CML-CP患者总的完全血液学缓解率(CHR)、主要细胞遗传学缓解率(MCyR)、完全细胞遗传学缓解率(CCyR)和BCR-ABL融合基因转阴率分别为96.6%、86.5%、77.5%和47.2%;12例CML进展期(加速期和急变期)患者的CHR、MCyR、CCyR、BCR-ABL转阴率分别为58.3%、25.0%、25.0%、8.3%.②服用IM 1年时获得CCyR患者的平均血浆药物谷浓度[(1472±482)μg/L]明显高于未获得CCyR者[(1067±373)μg/L],两者间差异有统计学意义(P＜0.05).服用IM 1年时获得主要分子学缓解(MMR)患者的平均血浆药物谷浓度[(1624 ±468)μg/L]也明显高于未获得MMR的患者[(1137±404)μg/L,P＜0.05].结论 IM明显提高CML患者细胞遗传学和分子学疗效.CML-CP期患者的疗效(1年时CCyR与MMR)与IM血浆药物谷浓度之间存在相关性.

Abstract：

Objective To analyze the clinical efficacy of imatinib mesylate (IM) for Ph-positive or BCR-ABL positive chronic myeloid leukemia( CML) to couple the trough plasma concentrations(Cmins) of IM with clinical responses and adverse events (AEs).Methods One hundred and one CML patients received IM therapy, and Cmins of IM were determmined in 30 patients.Results ①Cumulative complete hematological response( CHR) , major cytogenetic response ( MCyR ), complete cytogenetic response ( CCyR ) and negative BCR/ABL fusion gene rates were 96.6% , 86.5% ,77.5% and 47.2% , respectively, in CMLCP patients.In accelerated and blastic phases(AP and BC) patients, CHR, MCyR, CCyR and negative BCR-ABL fusion gene rates were 58.3% , 25.0% , 25.0% , 8.3%, respectively.②Mean Cmins of IM was significantly higher in the CCyR at 1 year[( 1472 ±482) μg/L]group than in the non-CCyR at 1 years group[(1067 ±373)μg/L](P＜0.05), and higher in the MMR at 1 year group than in the non-MMR at 1 years group[( 1624 ±468) μg/L as (1137 ±404) μg/L, P ＜0.05].Conclusion IM significantly improves cytogenetic and molecular response, envent-free survival, and overall survival for patients with Ph-positive CML.The Cmins of IM exerts a significant impact on clinical response (CCyR and MMR at 1 year).     

BCR／ABLDCDF—FISH信号特征与染色体核型的关系及其在慢性粒细胞白血病中的意义

目的探讨慢性粒细胞白血病（CML）BCR／ABL DCCF—FISH的信号特点及其与染色体核型的关系。结果使用BCR／ABL的DCDF探针对65例慢性粒细胞白血病骨髓标本进行荧光原位杂交及染色体核型检查。结果65例CML核型43例Ph阳性,1例阴性,其余21例未行核性检查或无可分析分裂相;FISH结果65例均为BCR／ABL阳性,其中9例伴ASS基因缺失,5例复杂易位,1例＋Ph伴ASS基因缺失。结论传统核型与DCDF-FISH,应互相结合,方可对遗传学特征作出更准确分析。