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Autografting of peripheral-blood progenitor cells early in chronic myeloid Leukemia / Transplante autólogo de células progenitoras em fase crônica precoce da Leucemia mielóide crônica
Carvalho, Paulo V. B; Souza, Cármino A; Lourenço, Gustavo J; Zocca, Maristela; Lorand-Metze, Irene; Lima, Carmen S. P.
  • Carvalho, Paulo V. B; Faculty of Medical Sciences. Department of Internal Medicine.
  • Souza, Cármino A; Faculty of Medical Sciences. Department of Internal Medicine.
  • Lourenço, Gustavo J; State University of Campinas. Hematology and Hemotherapy Center. Campinas. BR
  • Zocca, Maristela; State University of Campinas. Hematology and Hemotherapy Center. Campinas. BR
  • Lorand-Metze, Irene; Faculty of Medical Sciences. Department of Internal Medicine.
  • Lima, Carmen S. P; Faculty of Medical Sciences. Department of Internal Medicine.
Rev. bras. hematol. hemoter ; 26(4): 256-262, out.-dez. 2004. tab, graf
Article in English | LILACS | ID: lil-398129
ABSTRACT
The role of peripheral-blood progenitor cell (PBPC) transplantation as a treatmentfor chronic myeloid leukemia (CML) patients remains uncertain. We presentedherein 11 CML patients treated with autografting of PBPC in early chronic phasefollowed by interferon-alpha (IFN-α). Bone marrow samples obtained at diagnosisand during follow-up after autografting as well as leukapheresis products wereanalyzed by cytogenetics, fluorescence in situ hybridization (FISH) and reversetranscriptase-polymerase chain reaction (RT-PCR). The median follow-up of patientsafter autografting was 22 months (range 1-49). Two treatment-related deathsoccurred in patients enrolled in the study. Eight out of 9 (88.9%) and 7 out of 9(77.8%) patients achieved hematologic and cytogenetic responses, respectively.Molecular cytogenetic and molecular responses were seen in all 7 patients analyzed(100.0%) and in one single patient (11.1%), respectively. The median percentagesof Ph+ (78.0%) metaphases obtained after 6 months of autografting was lowerthan those obtained at diagnosis (100.0%, P=0.04). The median percentages ofFISH+ nuclei obtained at 3 (4.0%), 6 (7.3%) and 9 (14.7%) months afterautografting were also lower than that obtained at diagnosis (82.5%; P=0.002;P=0.003; P=0.030, respectively). At the end of the study, 9 patients (81.8%) werealive in chronic phase, 4 of them presenting hematologic, cytogenetic and molecularcytogenetic responses. We conclude that autografting performed with PBPC inearly chronic phase of CML followed by IFN-α results in lower numbers of Ph+and FISH+ cells in bone marrow.
RESUMO
O papel do transplante de célula progenitora periférica (CPP)como tratamento de pacientes com leucemia mielóide crônica(LMC) permanece incerto. Nós apresentamos neste estudo 11pacientes com LMC tratados com o transplante autólogo (TMOauto)de CPP durante a fase crônica precoce, seguido deinterferon-αlfa (IFN-α). Amostras de medula óssea, obtidas aodiagnóstico e durante o seguimento clínico após o TMO-auto, edos produtos das leucaféreses foram analisados por meio dacitogenética convencional, método de hibridização in situ comfluorescência (FISH) e transcrição reversa e reação em cadeiada polimerase (RT-PCR). A mediana de seguimento dos pacientesapós o TMO-auto foi de 22 meses (variação 1-49). Doisóbitos relacionados ao tratamento ocorreram em pacientes inseridosno estudo. Oito de nove (88,9%) e sete de nove (77,8%)pacientes obtiveram respostas hematológica e citogenética, respectivamente.Respostas citogenética molecular e molecular foramidentificadas em todos os sete pacientes analisados (100,0%)e em um único paciente (11,1%), respectivamente. A porcentagemmediana de metáfases Philadelphia positivas (Ph+) (78,0%)obtidas após seis meses do TMO-auto foi menor do que a obtidaao diagnóstico (100,0%, P=0,04). As porcentagens medianasde núcleos FISH+ obtidas aos três (4,0%), seis (7,3%) e nove(14,7%) meses após o TMO-auto foram também menores doque aquela obtida ao diagnóstico (82,5%; P = 0,002; P= 0,003;P = 0,030, respectivamente). Ao término do estudo, nove pacientes(81,8%) estavam vivos em fase crônica, quatro deles comrespostas hematológica, citogenética e citogenética molecular.Nós concluímos que o TMO-auto de CPP em fase crônica precoceda LMC, seguido por IFN-α, resulta em menor número decélulas Ph+ e FISH+ na medula óssea.
Subject(s)
Full text: Available Index: LILACS (Americas) Main subject: Transplantation, Autologous / Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Interferon-alpha / In Situ Hybridization, Fluorescence / Cytogenetics Limits: Humans Language: English Journal: Rev. bras. hematol. hemoter Journal subject: Hematology Year: 2004 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: State University of Campinas/BR

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Full text: Available Index: LILACS (Americas) Main subject: Transplantation, Autologous / Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Interferon-alpha / In Situ Hybridization, Fluorescence / Cytogenetics Limits: Humans Language: English Journal: Rev. bras. hematol. hemoter Journal subject: Hematology Year: 2004 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: State University of Campinas/BR