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Analysis of BCR ‐ ABL mRNA in chronic myelogenous leukemia patients and identification of a new BCR ‐related sequence in human DNA
Author(s) -
Marcelle Christophe,
Gale Robert P.,
Prokocimer Miron,
Berrebi Alan,
MerleBeral Hélène,
Canaani Eli
Publication year - 1989
Publication title -
genes, chromosomes and cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.754
H-Index - 119
eISSN - 1098-2264
pISSN - 1045-2257
DOI - 10.1002/gcc.2870010211
Subject(s) - chronic myelogenous leukemia , breakpoint cluster region , exon , philadelphia chromosome , abl , microbiology and biotechnology , biology , messenger rna , rna splicing , alternative splicing , polymerase chain reaction , leukemia , cancer research , gene , genetics , chromosomal translocation , rna , receptor , tyrosine kinase
The Philadelphia chromosome is present in more than 95% of chronic myelogenous leukemia patients and in up to 25% of patients with acute lymphocytic leukemia. The major consequence of the aberration is the fusion of the ABL and BCR genes. The position of the breakpoint on chromosome 22 determines which species of the potential three fused mRNAs and proteins will be synthesized. We have used the polymerase chain reaction (PCR) to detect these mRNAs in 53 patients and cell lines and found that around 20% contain simultaneously two BCR‐ABL mRNAs, presumably due to a process of alternative splicing. The results also indicate that most patients in lymphocytic blast crisis of CML contain the mRNA in which bcr exon 2 is linked to ABL exon II. Finally, we identified, cloned, and characterized a BCR ‐related sequence that originated from mRNA.