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    Outcomes of older patients aged 60 to 70 years undergoing reduced intensity transplant for acute myeloblastic leukemia: results of the NCRI acute myeloid leukemia 16 trial

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    Authors
    Russell, N. H.
    Hills, R. K.
    Thomas, A.
    Thomas, I.
    Kjeldsen, L.
    Dennis, Michael
    Craddock, C.
    Freeman, S.
    Clark, R. E.
    Burnett, A. K.
    Affiliation
    Department of Haematology, Nottingham University Hospitals.
    Issue Date
    2022
    
    Metadata
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    Abstract
    Reduced intensity conditioning (RIC) transplantation is increasingly offered to older patients with acute myeloblastic leukemia. We have previously shown that a RIC allograft, particularly from a sibling donor, is beneficial in intermediate-risk patients aged 35-65 years. We here present analyses from the NCRI AML16 trial extending this experience to older patients aged 60-70 inclusive lacking favorable-risk cytogenetics. Nine hundred thirty-two patients were studied, with RIC transplant in first remission given to 144 (sibling n=52, matched unrelated donor n=92) with a median follow-up for survival from complete remission of 60 months. Comparisons of outcomes of patients transplanted versus those not were carried out using Mantel-Byar analysis. Among the 144 allografted patients, 93 had intermediate-risk cytogenetics, 18 had adverse risk and cytogenetic risk group was unknown for 33. In transplanted patients survival was 37% at 5 years, and while the survival for recipients of grafts from siblings (44%) was better than that for recipients of grafts from matched unrelated donors (34%), this difference was not statistically significant (P=0.2). When comparing RIC versus chemotherapy, survival of patients treated with the former was significantly improved (37% versus 20%, hazard ratio = 0.67 [0.53-0.84]; P<0.001). When stratified by Wheatley risk group into good, standard and poor risk there was consistent benefit for RIC across risk groups. When stratified by minimal residual disease status after course 1, there was consistent benefit for allografting. The benefit for RIC was seen in patients with a FLT3 ITD or NPM1 mutation with no evidence of a differential effect by genotype. We conclude that RIC transplantation is an attractive option for older patients with acute myeloblastic leukemia lacking favorable-risk cytogenetics and, in this study, we could not find a group that did not benefit.
    Citation
    Russell NH, Hills RK, Thomas A, Thomas I, Kjeldsen L, Dennis M, et al. Outcomes of older patients aged 60 to 70 years undergoing reduced intensity transplant for acute myeloblastic leukemia: results of the NCRI acute myeloid leukemia 16 trial. Haematologica. 2022 Jul;107(7):1518-27. PubMed PMID: WOS:000823746100006. Pubmed Central PMCID: 9244837.
    Journal
    Haematologica
    URI
    http://hdl.handle.net/10541/625518
    DOI
    10.3324/haematol.2021.279010.
    PubMed ID
    34647442
    Additional Links
    https://dx.doi.org/10.3324/haematol.2021.279010.
    Type
    Article
    ae974a485f413a2113503eed53cd6c53
    10.3324/haematol.2021.279010.
    Scopus Count
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