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Research Article

Low dose alemtuzumab in patients with fludarabine-refractory chronic lymphocytic leukemia

, , , , , , & show all
Pages 424-429 | Received 27 Jul 2011, Accepted 08 Sep 2011, Published online: 05 Jan 2012
 

Abstract

Alemtuzumab has been shown to be effective in poor-prognosis chronic lymphocytic leukemia (CLL); treatment, however, has been associated with significant toxicity. With the aim of seeking better tolerability, we treated 39 patients with fludarabine-refractory CLL subcutaneous alemtuzumab 10 mg three times a week, for 18 weeks. In 18 randomly selected patients, after obtaining lymphocyte count reduction by 1 Log, the antibody was administered once weekly at the dose of 30 mg. Overall response rate was 44%, including 8% complete remissions. Median overall survival and progression free survival were 29.1 and 10.3 months, respectively. Treatment was well tolerated, severe non-CMV infection occurred in 7% of the patients. CMV reactivation was detected in 27% of the patients, with only one case of CMV disease. No deaths occurred during therapy. In conclusion, low-dose alemtuzumab shows a promising safety profile coupled with satisfactory effectiveness in this category of poor prognosis CLL patients.

Acknowledgements

This work was in part supported by a grant of the “Associazione Italiana Leucemie (AIL), sezione Milano e provincia” and “Assistenza e Studio Malati Ematologici (ASME).” We thank Mario Salvi MD for reviewing the manuscript.

Potential conflict of interest:

Disclosure forms provided by the authors are available with the full text of this article at www.informahealthcare.com/lal.

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