Abstract
Purpose
Pentoxifylline (PTX) has been shown to increase chemotherapy-induced apoptosis. A clinical trial was developed to evaluate the effect of the addition of PTX to the induction steroid window phase in children with acute lymphoblastic leukemia (ALL).
Methods
Thirty-two children were enrolled on this study. Children with a new diagnosis of ALL were randomly assigned to receive prednisone (PRD) 40 mg/m2/day only during the 7-day treatment pre-phase (PRD group, 11 patients) or to receive PRD with PTX (10 mg/kg/day) (PTX group, 11 patients); the control group included children with normal bone marrow (10 patients). Bone marrow aspiration (BMA) was performed at diagnosis (day −7) in all groups, and at day 0 (end of PRD window) for patients with ALL (PRD and PTX groups). Apoptosis was evaluated by flow cytometry (FC) using Annexin V-fluorescein isothiocyanate (FITC)/propidium iodide (PI) stains. Statistical analysis was performed using the Mann–Whitney U test.
Results
Apoptotic index at day −7 was similar in all groups. However, at day 0 post-treatment, apoptosis was significantly higher in the PTX group than in the PRD group (p < 0.001). There were no serious adverse effects associated with PTX.
Conclusions
PTX potentiates blast apoptosis induced by PRD in children with ALL during steroid window phase.
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Acknowledgments
This work was supported by grant FIS/IMSS/PROT/PRIO/11/015 from FOFOI, and Red de Inmunología del Cáncer y Enfermedades Infecciosas-CONACYT-253053. We are grateful to Ph.D Dr. Carlos Rodriguez-Galindo for his kind reviewing of this manuscript.
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Gonzalez-Ramella, O., Ortiz-Lazareno, P.C., Jiménez-López, X. et al. Pentoxifylline during steroid window phase at induction to remission increases apoptosis in childhood with acute lymphoblastic leukemia. Clin Transl Oncol 18, 369–374 (2016). https://doi.org/10.1007/s12094-015-1376-x
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DOI: https://doi.org/10.1007/s12094-015-1376-x