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  • Title: Higher infused CD34+ hematopoietic stem cell dose correlates with earlier lymphocyte recovery and better clinical outcome after autologous stem cell transplantation in non-Hodgkin's lymphoma.
    Author: Yoon DH, Sohn BS, Jang G, Kim EK, Kang BW, Kim C, Kim JE, Kim S, Lee DH, Lee JS, Park SJ, Park CJ, Huh J, Suh C.
    Journal: Transfusion; 2009 Sep; 49(9):1890-900. PubMed ID: 19453991.
    Abstract:
    BACKGROUND: Lymphocyte recovery after autologous stem cell transplantation (ASCT) has been shown to be associated with positive clinical outcome in non-Hodgkin's lymphoma (NHL). This study sought to identify variables that affect lymphocyte recovery and survival after ASCT. STUDY DESIGN AND METHODS: A retrospective analysis of outcomes in 97 consecutive patients with NHL who underwent ASCT in a single center from August 1999 to January 2008 was conducted. RESULTS: A significant relationship was not observed between infused lymphocyte count and days to recovery of absolute lymphocyte count 500 x 10(6)/L or greater after ASCT (ALC500; r = 0.139, p = 0.176), but there was a significant inverse correlation between infused CD34+ cell count and days to ALC500 (r = -0.333, p = 0.001). Univariately, infused CD34+ cell count and recovery of ALC500 by 20th day after ASCT were significant predictors of survival. The median overall survival (OS) and event-free survival (EFS) were significantly longer in patients who received 8.2 x 10(6) CD34+ cells/kg or more than in those who received fewer than 8.2 x 10(6) CD34+ cells/kg (OS, not reached vs. 11.6 months, p = 0.001; EFS, not reached vs. 4.8 months, p = 0.003). Multivariate analysis confirmed that infused CD34+ cell count was an independent prognostic factor for OS (p = 0.017) and EFS (p = 0.002). CONCLUSION: These data suggest that infused CD34+ cell count is predictive of kinetics of lymphocyte recovery after ASCT and is an independent prognostic factor for OS and EFS after ASCT in patients with NHL.
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