Influence of late treatment on how chronic myeloid leukemia responds to imatinib

dc.creatorSCERNI, Ana Carolina Costa
dc.creatorALVARES, Leonardo Azevedo
dc.creatorBELTRÃO, Ana Cristina
dc.creatorBENTES, Iê Regina
dc.creatorAZEVEDO, Tereza Cristina
dc.creatorBENTES, Alessandra Quinto
dc.creatorLEMOS, José Alexandre Rodrigues de
dc.date2013-09-30T16:33:31Z
dc.date2013-09-30T16:33:31Z
dc.date2009
dc.date.accessioned2023-09-28T15:21:13Z
dc.date.available2023-09-28T15:21:13Z
dc.identifierSCERNI, Ana Carolina Costa, et al. Influence of late treatment on how chronic myeloid leukemia responds to imatinib. Clinics, São Paulo, v. 64, n. 8, p. 731-734, 2009. Disponível em: <http://www.scielo.br/pdf/clin/v64n8/a04v64n8.pdf>. Acesso em: 30 set. 2013. <http://dx.doi.org/10.1590/S1807-59322009000800004>.
dc.identifier1980-5322
dc.identifier1807-5932
dc.identifierhttp://repositorio.ufpa.br/jspui/handle/2011/4312
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9012792
dc.descriptionINTRODUCTION: In Brazil, patients with chronic myeloid leukemia (CML) in the chronic phase were not given first-line imatinib treatment until 2008. Therefore, there was a long period of time between diagnosis and the initiation of imatinib therapy for many patients. This study aims to compare the major molecular remission (MMR) rates of early versus late imatinib therapy in chronic phase CML patients. METHODS: Between May 2002 and November 2007, 44 patients with chronic phase CML were treated with second-line imatinib therapy at the Hematology Unit of the Ophir Loyola Hospital (Belém, Pará, Brazil). BCR-ABL transcript levels were measured at approximately six-month intervals using quantitative polymerase chain reaction. RESULTS: The early treatment group presented a 60% probability of achieving MMR, while the probability for those patients who received late treatment was 40%. The probability of either not achieving MMR within one year of the initiation of imatinib therapy or losing MMR was higher in patients who received late treatment (79%), compared with patients who received early treatment (21%, odds ratio=5.75, P=0.012). The probability of maintaining MMR at 30 months of treatment was 80% in the early treatment group and 44% in the late treatment group (P=0.0005). CONCLUSIONS: For CML patients in the chronic phase who were treated with second-line imatinib therapy, the probability of achieving and maintaining MMR was higher in patients who received early treatment compared with those patients for whom the time interval between diagnosis and initiation of imatinib therapy was longer than one year.
dc.formatapplication/pdf
dc.languageeng
dc.rightsAcesso Aberto
dc.subjectLeucemia mielogênica crônica BCR-ABL
dc.subjectTratamento tardio
dc.subjectImatinib
dc.subjectRemissão molecular
dc.titleInfluence of late treatment on how chronic myeloid leukemia responds to imatinib
dc.typeArtigo de Periódico


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