Chromosomal studies were performed in the same laboratory on 97 untreated cases of de novo acute nonlymphocytic leukemia M2.The overall incidence of chromosomal abnormality was 70.1% (68 out of 97 cases),which was hig...Chromosomal studies were performed in the same laboratory on 97 untreated cases of de novo acute nonlymphocytic leukemia M2.The overall incidence of chromosomal abnormality was 70.1% (68 out of 97 cases),which was higher in children(84. 2% )than in edults (61%).The male to female chromosomal abnormality ratio was nearly the same(male 71% and female 68. 4% .P>0.05).Hypodiploidy was the most common numerical abnormality(39%)and t (8;21) was the most common structural abnormality (48.1%) It the patients with t (8;21),64 5%(2) out of 31cases) male lost chromosome Y (-Y) and 33%(5 out of 15 cases)female lost one chromosomeX(-X).展开更多
Bone marrow studies including morphological,morphometrical and ultrastructural aspects were performed in 35 patients with M2/t(8;21)and and 23 patients with M2/NN.It was found that M2/t(8;21)patients had higher cellul...Bone marrow studies including morphological,morphometrical and ultrastructural aspects were performed in 35 patients with M2/t(8;21)and and 23 patients with M2/NN.It was found that M2/t(8;21)patients had higher cellularity in bone marrow.Type(Ⅱ)myeloblast cells were predominant among myeoloblasts.Deformation of nuclei,nucleocytoplasmic asynchronism and dysmegakaryctytopoiesis were more evident n M2/t (8;21) than in M2/NN patients.展开更多
We used the flow cytometric immunoassay to study the correlation between the tumor-suppressor gene product p53- and the DNA ploidy in 30 de novo cases of acute nonlymphocytic leukemia (ANLL).The results showed that 15...We used the flow cytometric immunoassay to study the correlation between the tumor-suppressor gene product p53- and the DNA ploidy in 30 de novo cases of acute nonlymphocytic leukemia (ANLL).The results showed that 15 cases were negative and the other 15 cases were positive expression for p53. As compared with p53 negative (p53) cases, the patients with positive p53 (p53+) had higher percentage of bone marrow blasts and lower peripheral leukocyte and platelet counts,which had no influence on the complete remission rate. Before treatment, DNA diploidy was seen in 18 cases including 12 p53- cases, and DNA aneuploidy in 12 cases including 9 p53+. After therapy, aneuploidy could be transformed into diploidy.Patients with P53+ or having aneuploidy in complete remission were at risk for early relapse. We believe that p53 may be involved in the process of leukemogenesis and progression of ANLL.展开更多
采用PCR-RFLP分析检测了APC抑癌基因在7例MDS,36例ANLL和15例正常人对照中的杂合性缺失(loss of heterozygosity,LOH),并讨论其与髓系表型特异性、临床表现以及预后的相关性。PCR-RFLP的分析结果发现,在58例标本中有35例(60.3％)为杂合...采用PCR-RFLP分析检测了APC抑癌基因在7例MDS,36例ANLL和15例正常人对照中的杂合性缺失(loss of heterozygosity,LOH),并讨论其与髓系表型特异性、临床表现以及预后的相关性。PCR-RFLP的分析结果发现,在58例标本中有35例(60.3％)为杂合子个体,能提供缺失信息,其中包括9例正常人,22例ANLL和4例MDS。正常组未见1例发生LOH(0/9),MDS组1例RAEB阳性(1/4),而ANLL中LOH阳性的有4例(4/22),其中3例为M_(2a)(3/6),1例为M_(4a)(1/1)。统计学证实M_(2a)的阳性率与正常组有显著性差异(P=0.044)。LOH阳性及阴性AML病人的临床资料比较,前者的共同点有:①中老年人偏多;②外周血WBC数较高,但浸润现象不明显;③对化疗较敏感。结论是APC基因的异常可能是发生于髓系恶性疾病中粒系异常克隆的一个独立分子事件,代表着一部分具有特殊临床表现及预后的病人群体。展开更多
文摘Chromosomal studies were performed in the same laboratory on 97 untreated cases of de novo acute nonlymphocytic leukemia M2.The overall incidence of chromosomal abnormality was 70.1% (68 out of 97 cases),which was higher in children(84. 2% )than in edults (61%).The male to female chromosomal abnormality ratio was nearly the same(male 71% and female 68. 4% .P>0.05).Hypodiploidy was the most common numerical abnormality(39%)and t (8;21) was the most common structural abnormality (48.1%) It the patients with t (8;21),64 5%(2) out of 31cases) male lost chromosome Y (-Y) and 33%(5 out of 15 cases)female lost one chromosomeX(-X).
文摘Bone marrow studies including morphological,morphometrical and ultrastructural aspects were performed in 35 patients with M2/t(8;21)and and 23 patients with M2/NN.It was found that M2/t(8;21)patients had higher cellularity in bone marrow.Type(Ⅱ)myeloblast cells were predominant among myeoloblasts.Deformation of nuclei,nucleocytoplasmic asynchronism and dysmegakaryctytopoiesis were more evident n M2/t (8;21) than in M2/NN patients.
文摘We used the flow cytometric immunoassay to study the correlation between the tumor-suppressor gene product p53- and the DNA ploidy in 30 de novo cases of acute nonlymphocytic leukemia (ANLL).The results showed that 15 cases were negative and the other 15 cases were positive expression for p53. As compared with p53 negative (p53) cases, the patients with positive p53 (p53+) had higher percentage of bone marrow blasts and lower peripheral leukocyte and platelet counts,which had no influence on the complete remission rate. Before treatment, DNA diploidy was seen in 18 cases including 12 p53- cases, and DNA aneuploidy in 12 cases including 9 p53+. After therapy, aneuploidy could be transformed into diploidy.Patients with P53+ or having aneuploidy in complete remission were at risk for early relapse. We believe that p53 may be involved in the process of leukemogenesis and progression of ANLL.
文摘采用PCR-RFLP分析检测了APC抑癌基因在7例MDS,36例ANLL和15例正常人对照中的杂合性缺失(loss of heterozygosity,LOH),并讨论其与髓系表型特异性、临床表现以及预后的相关性。PCR-RFLP的分析结果发现,在58例标本中有35例(60.3％)为杂合子个体,能提供缺失信息,其中包括9例正常人,22例ANLL和4例MDS。正常组未见1例发生LOH(0/9),MDS组1例RAEB阳性(1/4),而ANLL中LOH阳性的有4例(4/22),其中3例为M_(2a)(3/6),1例为M_(4a)(1/1)。统计学证实M_(2a)的阳性率与正常组有显著性差异(P=0.044)。LOH阳性及阴性AML病人的临床资料比较,前者的共同点有:①中老年人偏多;②外周血WBC数较高,但浸润现象不明显;③对化疗较敏感。结论是APC基因的异常可能是发生于髓系恶性疾病中粒系异常克隆的一个独立分子事件,代表着一部分具有特殊临床表现及预后的病人群体。
