The breakpoint cluster region site in patients with Philadelphia chromosome-positive chronic myelogenous leukemia. Clinical, laboratory, and prognostic correlations. 1995

C F Verschraegen, and H M Kantarjian, and C Hirsch-Ginsberg, and M S Lee, and S O'Brien, and M B Rios, and S A Stass, and M Keating, and M Talpaz
Department of Hematology, University of Texas M. D. Anderson Cancer Center, Houston 77030, USA.

BACKGROUND The breakpoint site of the breakpoint cluster region (bcr) has been correlated with patient characteristics, with the disease phase, and with the prognosis of patients with chronic myelogenous leukemia (CML), but the findings remain controversial. METHODS Appropriate restriction enzymes and the 3' and universal probes were used to map the breakpoint site by Southern blot analysis into 5' and 3' breakpoints and a breakpoint in zone 3 (or fragment 2) in 362 patients in different phases of CML (238 in early chronic phase, 69 in late chronic phase, 31 in accelerated phase, and 24 in blastic phase). Standard statistical methods were used to evaluate differences in characteristics and in prognosis by the breakpoint site. RESULTS No correlation was noted between CML phases and breakpoint site. Among patients in the early chronic phase, thrombocytosis was significantly associated with the 3' breakpoint site (P = 0.02), whereas peripheral basophilia occurred more frequently with the 5' breakpoint site (P = 0.05). Other patient and disease characteristics were similar in frequency among the breakpoint-site subgroups. There was no difference in response to alpha-interferon therapy (186 patients treated) by the breakpoint site. Survival, dated from either referral to the authors' institution or from diagnosis, was not significantly different among patients with early chronic phase CML by the breakpoint site. However, patients with a 3' deletion tended to have a shorter survival. CONCLUSIONS Determination of the breakpoint site by Southern blot analysis does not help to predict prognosis of patients with CML.

UI MeSH Term Description Entries
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D011379 Prognosis A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations. Prognostic Factor,Prognostic Factors,Factor, Prognostic,Factors, Prognostic,Prognoses
D002892 Chromosomes, Human, Pair 22 A specific pair of GROUP G CHROMOSOMES of the human chromosome classification. Chromosome 22
D004273 DNA, Neoplasm DNA present in neoplastic tissue. Neoplasm DNA
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014178 Translocation, Genetic A type of chromosome aberration characterized by CHROMOSOME BREAKAGE and transfer of the broken-off portion to another location, often to a different chromosome. Chromosomal Translocation,Translocation, Chromosomal,Chromosomal Translocations,Genetic Translocation,Genetic Translocations,Translocations, Chromosomal,Translocations, Genetic
D015183 Restriction Mapping Use of restriction endonucleases to analyze and generate a physical map of genomes, genes, or other segments of DNA. Endonuclease Mapping, Restriction,Enzyme Mapping, Restriction,Site Mapping, Restriction,Analysis, Restriction Enzyme,Enzyme Analysis, Restriction,Restriction Enzyme Analysis,Analyses, Restriction Enzyme,Endonuclease Mappings, Restriction,Enzyme Analyses, Restriction,Enzyme Mappings, Restriction,Mapping, Restriction,Mapping, Restriction Endonuclease,Mapping, Restriction Enzyme,Mapping, Restriction Site,Mappings, Restriction,Mappings, Restriction Endonuclease,Mappings, Restriction Enzyme,Mappings, Restriction Site,Restriction Endonuclease Mapping,Restriction Endonuclease Mappings,Restriction Enzyme Analyses,Restriction Enzyme Mapping,Restriction Enzyme Mappings,Restriction Mappings,Restriction Site Mapping,Restriction Site Mappings,Site Mappings, Restriction
D015464 Leukemia, Myelogenous, Chronic, BCR-ABL Positive Clonal hematopoetic disorder caused by an acquired genetic defect in PLURIPOTENT STEM CELLS. It starts in MYELOID CELLS of the bone marrow, invades the blood and then other organs. The condition progresses from a stable, more indolent, chronic phase (LEUKEMIA, MYELOID, CHRONIC PHASE) lasting up to 7 years, to an advanced phase composed of an accelerated phase (LEUKEMIA, MYELOID, ACCELERATED PHASE) and BLAST CRISIS. Granulocytic Leukemia, Chronic,Leukemia, Granulocytic, Chronic,Leukemia, Myelocytic, Chronic,Leukemia, Myelogenous, Chronic,Leukemia, Myeloid, Chronic,Myelocytic Leukemia, Chronic,Myelogenous Leukemia, Chronic,Myeloid Leukemia, Chronic,Leukemia, Chronic Myelogenous,Leukemia, Chronic Myeloid,Leukemia, Myelogenous, Ph1 Positive,Leukemia, Myelogenous, Ph1-Positive,Leukemia, Myeloid, Ph1 Positive,Leukemia, Myeloid, Ph1-Positive,Leukemia, Myeloid, Philadelphia Positive,Leukemia, Myeloid, Philadelphia-Positive,Myelogenous Leukemia, Ph1-Positive,Myeloid Leukemia, Ph1-Positive,Myeloid Leukemia, Philadelphia-Positive,Chronic Granulocytic Leukemia,Chronic Granulocytic Leukemias,Chronic Myelocytic Leukemia,Chronic Myelocytic Leukemias,Chronic Myelogenous Leukemia,Chronic Myelogenous Leukemias,Chronic Myeloid Leukemia,Chronic Myeloid Leukemias,Granulocytic Leukemias, Chronic,Leukemia, Chronic Granulocytic,Leukemia, Chronic Myelocytic,Leukemia, Ph1-Positive Myelogenous,Leukemia, Ph1-Positive Myeloid,Leukemia, Philadelphia-Positive Myeloid,Leukemias, Chronic Granulocytic,Leukemias, Chronic Myelocytic,Leukemias, Chronic Myelogenous,Leukemias, Chronic Myeloid,Leukemias, Ph1-Positive Myelogenous,Leukemias, Ph1-Positive Myeloid,Leukemias, Philadelphia-Positive Myeloid,Myelocytic Leukemias, Chronic,Myelogenous Leukemia, Ph1 Positive,Myelogenous Leukemias, Chronic,Myelogenous Leukemias, Ph1-Positive,Myeloid Leukemia, Ph1 Positive,Myeloid Leukemia, Philadelphia Positive,Myeloid Leukemias, Chronic,Myeloid Leukemias, Ph1-Positive,Myeloid Leukemias, Philadelphia-Positive,Ph1-Positive Myelogenous Leukemia,Ph1-Positive Myelogenous Leukemias,Ph1-Positive Myeloid Leukemia,Ph1-Positive Myeloid Leukemias,Philadelphia-Positive Myeloid Leukemia,Philadelphia-Positive Myeloid Leukemias
D016019 Survival Analysis A class of statistical procedures for estimating the survival function (function of time, starting with a population 100% well at a given time and providing the percentage of the population still well at later times). The survival analysis is then used for making inferences about the effects of treatments, prognostic factors, exposures, and other covariates on the function. Analysis, Survival,Analyses, Survival,Survival Analyses
D016044 Fusion Proteins, bcr-abl Translation products of a fusion gene derived from CHROMOSOMAL TRANSLOCATION of C-ABL GENES to the genetic locus of the breakpoint cluster region gene on chromosome 22. Several different variants of the bcr-abl fusion proteins occur depending upon the precise location of the chromosomal breakpoint. These variants can be associated with distinct subtypes of leukemias such as PRECURSOR CELL LYMPHOBLASTIC LEUKEMIA-LYMPHOMA; LEUKEMIA, MYELOGENOUS, CHRONIC, BCR-ABL POSITIVE; and NEUTROPHILIC LEUKEMIA, CHRONIC. Oncogene Protein p190(bcr-abl),Oncogene Protein p210(bcr-abl),bcr-abl Fusion Protein,bcr-abl Fusion Proteins,Bcr-Abl Tyrosine Kinase,Oncogene Protein p185(bcr-abl),Oncogene Protein p230(bcr-abl),p185(bcr-abl) Fusion Proteins,p190(bcr-abl) Fusion Proteins,p210(bcr-abl) Fusion Proteins,p230(bcr-abl) Fusion Proteins,Bcr Abl Tyrosine Kinase,Fusion Protein, bcr-abl,Fusion Proteins, bcr abl,Kinase, Bcr-Abl Tyrosine,Protein, bcr-abl Fusion,Tyrosine Kinase, Bcr-Abl,bcr abl Fusion Protein,bcr abl Fusion Proteins

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