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Clofarabine, cyclophosphamide and etoposide as single-course re-induction therapy for children with refractory/multiple relapsed acute lymphoblastic leukaemia.

Author(s): Locatelli F, Testi AM, Bernardo ME, Rizzari C, Bertaina A, Merli P, Pession A, Giraldi E, Parasole R, Barberi W, Zecca M

Affiliation(s): Oncoematologia Pediatrica, Fondazione IRCCS Policlinico San Matteo, Universita di Pavia, Italy. f.locatelli@smatteo.pv.it

Publication date & source: 2009-11, Br J Haematol., 147(3):371-8. Epub 2009 Aug 29.

Publication type: Clinical Trial; Multicenter Study; Research Support, Non-U.S. Gov't

The safety and efficacy of the combination clofarabine/cyclophosphamide/etoposide were evaluated in children with advanced acute lymphoblastic leukaemia (ALL). The study enrolled 25 paediatric patients (median age 12.5 years) with either refractory (n = 17; 68%) or multiple relapsed (n = 8; 32%) ALL to receive clofarabine 40 mg/m(2), cyclophosphamide 400 mg/m(2) and etoposide 150 mg/m(2), daily for 5 consecutive days. No patient died from treatment-related complications. The most common adverse events were febrile neutropenia, mucositis and reversible liver toxicity; no case of liver veno-occlusive disease was reported. The overall remission rate was 56%: 13 patients (52%) achieved complete remission (CR) and one (4%) CR without platelet recovery (CRp). In seven of the 13 (54%) patients achieving CR, remissions were of sufficient duration to allow patients to receive allogeneic haematopoietic stem cell transplantation. The probability of CR/CRp was greater in the 17 patients with B cell precursor ALL than in the eight with T-ALL (76% vs. 12%, respectively, P < 0.01). The 18-month overall survival probability was 39% and 0% in patients who did or did not respond to the treatment, respectively (P < 0.01). These data suggest that the clofarabine/cyclophosphamide/etoposide regimen is well tolerated and can induce clinical response in a relevant proportion of children with refractory/multiple relapsed ALL.

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