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Chromosome and bcr rearrangement in chronic myelogenous leukaemia and their correlation with clinical states and prognosis of the disease
Author(s) -
Tien H. F.,
Wang C. H.,
Chen Y. C.,
Shen M. C.,
Wu H. S.,
Lee F. Y.,
Chuang S. M.,
Liu C. H.
Publication year - 1990
Publication title -
british journal of haematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.907
H-Index - 186
eISSN - 1365-2141
pISSN - 0007-1048
DOI - 10.1111/j.1365-2141.1990.tb07784.x
Subject(s) - breakpoint cluster region , disease , philadelphia chromosome , chronic myelogenous leukemia , medicine , chromosome , cancer research , oncology , immunology , leukemia , genetics , chromosomal translocation , biology , gene , receptor
S ummary . Among 77 unselected patients with chronic myelogenous leukaemia (CML), 70 had Philadelphia chromosome (Ph 1 ) in blood cells. Extra chromosomal abnormalities were noted in 4%, 55% and 78% of Ph 1 ‐positive patients in chronic phase, accelerated phase and acute blast crisis, respectively. Rearrangement of the bcr was detected in 46 of 47 Ph 1 ‐positive patients studied and also in three of five Ph 1 ‐negative ones. The locations of the breakpoints were mapped to one of four zones of the bcr in 45 patients. The median duration from diagnosis of CML to onset of acute blast crisis was not significantly different between the two groups of patients with breakpoints in the 5’portion (34 months), and in the 3’portion (39 months) of the bcr. In addition, the locations of the breakpoints within the bcr did not change as the disease progressed in the six patients who had DNA analysed both in the chronic phase and subsequently in transformation. In one of them, an additional aberrant band which was not present in the beginning of the acute phase was detected in blood cells taken 2 months later. It is suggested from the studies that transformation of CML may not be related to alterations within the bcr.