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Type: Artigo de periódico
Title: Early Total White Blood Cell Recovery Is A Predictor Of Low Number Of Apheresis And Good Cd34+ Cell Yield
Author: Marques J.F.C.
Vigorito A.C.
Aranha F.J.P.
Lorand-Metze I.
Miranda E.C.M.
Lima Filho E.C.
Valbonesi M.
Santini G.
De Souza C.A.
Abstract: Objective. We analysed peripheral blood progenitor cell (PBPC) mobilisation and collection in order to assess the main factors related to CD34+ cell yields in patients affected by haematological malignancies. Patients and Methods. The features of CD34+ cell mobilisation of patients with haematological malignancies that underwent autologous bone marrow transplantation were examined. Mobilisation chemotherapy consisted mainly of cyclophosphamide (CY) 4 or 7 g/m2 followed by growth factors. Leukapheresis was started when the WBC counts reached 1.0×109/l with the aim to collect at least 5×106 CD34+ cells/kg body weight. The aphereses were performed on continuous-flow blood cell separators. The analysed variables were: age, diagnosis, CT mobilisation regimen, type of growth factor, number of previous CT lines, prior radiotherapy, days for WBC recovery and number of aphereses procedures to achieve the target of CD34+ cells. Results. There were 41 consecutive patients (26 M/15 F): 21 non-Hodgkin's lymphoma (NHL), 15 Hodgkin's disease (HD), two chronic myeloid leukaemia (CML) and three multiple myeloma (MM). Eleven patients could not collect the proposed threshold of CD34+ cells. CY 4 mobilised patients recovered WBC counts in less days (P=0.03). By ANOVA, the days to WBC recovery had a linear function of the predictors "number of aphereses" and "type of mobilisation CT" (coefficients: 0.86 and 0.95, respectively). For the number of aphereses and WBC recovery after CT mobilisation, we obtained a correlation coefficient of 0.36 (P=0.02). Conclusion. This study shows that it is feasible to mobilise and collect PBPC in patients previously treated with CT with or without RT. There was a linear correlation between the days for WBC recovery and the number of aphereses needed to collect the target number of CD34+ cells. The study suggests that early WBC recovery, using mainly CY 4 mobilisation chemotherapy, is an important predictor of a low number of aphereses to achieve a good CD34+ yield. © 2000 Elsevier Science Ltd. All rights reserved.
Citation: Transfusion And Apheresis Science. , v. 23, n. 2, p. 91 - 100, 2000.
Rights: fechado
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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