Loss of heterozygosity at D3S2 locus of short arm of chromosome 3 in chronic myelogenous leukemia.
Loss of heterozygosity (LOH) on the short arm of chromosome 3 was studied in four patients with chronic myelogenous leukemia (CML). The bcr gene rearrangement-negative spleen cells and a B-cell line were used as normal tissue controls. Five probes showing restriction fragment length polymorphisms (RFLP) and a variable number of tandem repeats on chromosome 3 were used. DNA patterns in Southern blotting were compared between normal cells and leukemic cells. One of the four patients had LOH at the D3S2 locus mapped to 3p14.3-3p21.3. The LOH was detected in the blastic phase, but not in the chronic phase. This patient showed normal chromosomes 3 in the blastic phase. These data suggest the possibility of the existence of LOH in CML, occurring as a secondary event in the blastic phase, and which might have been induced by submicroscopic deletion or somatic recombination.
Department of Hematology, Hiroshima University, Japan.
K
K
Tanaka
A M
AM
Mansoor
C
C
Shigeta
N
N
Oguma
N
N
Kamada
D015139:Blotting, Southern; D002892:Chromosomes, Human, Pair 22; D002893:Chromosomes, Human, Pair 3; D002899:Chromosomes, Human, Pair 9; D004247:DNA / Q000032:analysis; D015321:Gene Rearrangement; D006801:Humans; D007621:Karyotyping; D015464:Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length; D011505:Protein-Tyrosine Kinases; D011518:Proto-Oncogene Proteins / Q000235:genetics; D051562:Proto-Oncogene Proteins c-bcr; D014178:Translocation, Genetic
D011518:Proto-Oncogene Proteins; D004247:DNA; D011505:Protein-Tyrosine Kinases; C496613:BCR protein, human; D051562:Proto-Oncogene Proteins c-bcr