Abstract:
:Arecent source data meta-analysis of randomized trials in adults assessing the immunoconjugate gemtuzumab ozogamicin combined with standard chemotherapy in acute myeloid leukemia showed a significant survival benefit in patients without an adverse karyotype. It is not clear whether the optimal dose should be 3 mg/m(2) or 6 mg/m(2) In this study, we randomized 788 patients to a single dose of gemtuzumab ozogamicin 3 mg/m(2) or 6 mg/m(2) with the first course of induction therapy. We found that the rate of complete remission was higher with 3 mg/m(2) [82% vs 76%; odds ratio 1.46 (1.04-2.06); P=0.03], but this was balanced by a higher rate of complete remission with incomplete peripheral blood count recovery in the 6 mg/m(2) treatment (10% vs 7%) resulting in similar overall response rate [89% vs 86%; hazard ratio 1.34 (0.88-2.04); P=0.17]. There was no overall difference in relapse or survival at four years between the arms: 46% vs 54%; hazard ratio 1.17 (0.94-1.45), P=0.5, and 50% versus 47%; hazard ratio 1.10 (0.90-1.34), P=0.3, respectively. The 30- and 60-day mortality was significantly higher in the 6 mg/m(2) recipients: 7% versus 3%; hazard ratio 2.07 (1.11-3.87), P=0.02, and 9% versus 5%; hazard ratio 1.99 (1.17-3.39), P=0.01, respectively, which in addition was associated with a higher rate of veno-occlusive disease (5.6% vs 0.5%; P<0.0001). Our conclusion from this trial is that there is no advantage in using a single dose of 6 mg/m(2) of gemtuzumab ozogamicin in combination with induction chemotherapy when compared with a 3 mg/m(2) dose, with respect to response, disease-free and overall survival, either overall, or in any disease subgroup. (AML17 was registered as ISRCTN55675535).
journal_name
Haematologicajournal_title
Haematologicaauthors
Burnett A,Cavenagh J,Russell N,Hills R,Kell J,Jones G,Nielsen OJ,Khwaja A,Thomas I,Clark R,UK NCRI AML Study Group.doi
10.3324/haematol.2016.141937subject
Has Abstractpub_date
2016-06-01 00:00:00pages
724-31issue
6eissn
0390-6078issn
1592-8721pii
haematol.2016.141937journal_volume
101pub_type
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