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  • Title: The genotype nucleophosmin mutated and FLT3-ITD negative is characterized by high bax/bcl-2 ratio and favourable outcome in acute myeloid leukaemia.
    Author: Del Poeta G, Ammatuna E, Lavorgna S, Capelli G, Zaza S, Luciano F, Ottone T, Del Principe MI, Buccisano F, Maurillo L, Panetta P, de Fabritiis P, Stasi R, Venditti A, Amadori S, Lo Coco F.
    Journal: Br J Haematol; 2010 May; 149(3):383-7. PubMed ID: 20148885.
    Abstract:
    Nucleophosmin gene (NPM1) mutations characterize acute myeloid leukaemia (AML) with normal karyotype and frequently co-exist with FLT3 internal tandem duplications (ITD). We evaluated bcl-2, bax, NPM1 and FLT3-ITD in 222 AML patients. Bax/bcl-2 ratio >0.35 and NPM1 without FLT3-ITD were significantly associated (P = 0.0001). NPM1-mutated (mt)/FLT3-ITD negative patients showed a higher complete remission (CR) rate (90%, P = 0.0002) and a longer overall survival (OS, P = 0.00007). NPM1-mt/FLT3-ITD negative plus bax/bcl-2 > 0.35 subset showed a very high CR rate (96%), very long OS (P = 0.00005) and disease-free survival (P = 0.004). The favourable prognosis of NPM1-mt/FLT3-ITD negative patients might be explained by a higher bax/bcl-2 ratio.
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