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Prognostic relevance of TLX3 (HOX11L2) expression in childhood T-cell acute lymphoblastic leukaemia treated with Berlin–Frankfurt–Münster (BFM) protocols containing early and late re-intensification elements

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons50606

Ullmann,  Reinhard
Molecular Cytogenetics (Reinhard Ullmann), Dept. of Human Molecular Genetics (Head: Hans-Hilger Ropers), Max Planck Institute for Molecular Genetics, Max Planck Society;

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Zitation

Attarbaschi, A., Pisecker, M., Inthal, A., Mann, G., Janousek, D., Dworzak, M., et al. (2010). Prognostic relevance of TLX3 (HOX11L2) expression in childhood T-cell acute lymphoblastic leukaemia treated with Berlin–Frankfurt–Münster (BFM) protocols containing early and late re-intensification elements. British Journal of Hematology, 148(2), 293-300. doi:10.1111/j.1365-2141.2009.07944.x.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0010-7C3E-8
Zusammenfassung
TLX3 expression (TLX3+) in childhood T-cell acute lymphoblastic leukaemia (T-ALL) seems to be associated with a poor prognosis when treated with regimens that lack early and/or late re-intensification therapy elements. Because such elements are essential components of the ALL-BFM (Berlin–Frankfurt–Münster) protocols, we evaluated whether TLX3+ T-ALL patients benefit from this type of therapy. Thirty-one/131 childhood T-ALL cases (24%) enrolled into four population-based Austrian ALL-BFM therapy studies were TLX3+. The male to female ratio was 3·5:1 and median age and leucocyte count at diagnosis were 8·7 years and 58·9 × 109/l, respectively. Twenty-four patients (77%) were good responders to prednisone. All were in complete remission after induction therapy. After a median observation time of 4·9 years (range 0·4–16·1 years) 28/31 TLX3+ cases remained in first complete remission after chemotherapy with one after additional stem cell transplantation. Although molecular disease was frequently present after a 4-drug induction therapy, final treatment outcome was excellent indicating that TLX3+ T-ALL cases may benefit from a BFM-type of ALL therapy with early and late re-intensification elements. Moreover, the fact that 2/3 relapses were also NUP214-ABL1+ suggests that these cases might represent the particular risk-prone TLX3+ subgroup that could benefit from a targeted tyrosine kinase inhibitor therapy.