Abstract:
:To study the hierarchical levels of stem cell targets for ABL-kinase domain mutations in CML, highly purified CD34+CD38- and CD34+CD38+ cell populations and their LTC-IC-derived progeny were analyzed in four patients at diagnosis (n=1) or in advanced phases (n=3) of their disease. In the single patient with early phase CML who later developed an Imatinib Mesylate-resistance and a Y253H mutation, no mutation was detectable in purified cell fractions analyzed at diagnosis nor in their LTC-IC-derived progeny. In contrast, in three patients in advanced phase CML, ABL-kinase mutations demonstrated in peripheral blood cells by sequencing (Q252E and M351T) were detectable in the FACS-sorted cells and became amplified in the LTC-IC-derived progeny of the primitive cells. These findings demonstrate that in late CP or advanced CML, ABL-kinase mutations occur as an intraclonal event in the primitive Ph1+ stem cell compartments with progression of this clone towards IM-resistant blast phase.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Sorel N,Bonnet ML,Guillier M,Guilhot F,Brizard A,Turhan AGdoi
10.1016/j.bbrc.2004.08.169subject
Has Abstractpub_date
2004-10-22 00:00:00pages
728-30issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(04)01961-8journal_volume
323pub_type
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