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Progenitor cell involvement is predictive of response to induction chemotherapy in paediatric acute myeloid leukaemia
Author(s) -
Johnston Donna L.,
Meshinchi Soheil,
Opheim Kent E.,
Pallavicini Maria G.,
Feusner James,
Woods William G.,
Lange Beverly J.,
Radich Jerald P.,
Bernstein Irwin D.
Publication year - 2003
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 - 10.1046/j.1365-2141.2003.04633.x
Subject(s) - monosomy , induction chemotherapy , progenitor cell , cd34 , cd33 , chemotherapy , myeloid , medicine , cancer research , oncology , stem cell , biology , immunology , karyotype , genetics , gene , chromosome
Summary. In acute myeloid leukaemia (AML), involvement of early progenitor cells may predict poor response to induction chemotherapy. We evaluated the involvement of early progenitor cells in two AML subtypes with a favourable prognosis [t(8;21) and t(15;17)], and a subtype with poor prognosis (monosomy 7). CD34 + CD33 − cells were isolated by fluorescence‐activated cell sorting, grown in liquid medium followed by culture in semi‐solid medium, and the colonies that were formed were analysed for the identifiable genetic markers. Two of 136 colonies from six t(8;21) AML patients expressed the AML1‐ETO transcript, and all six patients achieved remission after induction. None of 192 colonies from five t(15;17) AML patients expressed the RAR α ‐ PML transcript and all achieved remission. In contrast, in three of 10 cases of monosomy 7 AML, colonies were positive for monosomy 7, and all three patients failed to enter remission. However, five of six evaluable patients with colonies negative for monosomy 7 entered remission. These data support the hypothesis that leukaemic involvement of early progenitor cells affects the response to induction chemotherapy.