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Prepublished online as a Blood First Edition Paper on January 23, 2003; DOI 10.1182/blood-2002-09-2802.
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Blood, 1 June 2003, Vol. 101, No. 11, pp. 4267-4272
CLINICAL OBSERVATIONS, INTERVENTIONS, AND THERAPEUTIC TRIALS
Phase 2 study of alemtuzumab (anti-CD52 monoclonal antibody) in patients with advanced mycosis fungoides/Sézary syndrome
Jeanette Lundin,
Hans Hagberg,
Roland Repp,
Eva Cavallin-Ståhl,
Susanne Fredén,
Gunnar Juliusson,
Eija Rosenblad,
Geir Tjønnfjord,
Tom Wiklund, and
Anders Österborg
From the Departments of Hematology/Oncology and Dermatology, Karolinska Hospital, Stockholm, Sweden; Departments of Oncology/Hematology, Uppsala University Hospital, Sweden; University of Erlangen, Germany; Lund University Hospital, Sweden; Ryhov Hospital, Jgönköping, Sweden; Linköping University Hospital, Sweden; Rikshospitalet, Oslo, Norway; and Helsinki University Hospital, Finland.
This phase 2 study evaluated the safety and efficacy of alemtuzumab in 22 patients with advanced mycosis fungoides/Sézary syndrome (MF/SS). Most patients had stage III or IV disease, reduced performance status, and severe itching. The overall response (OR) rate was 55%, with 32% of patients in complete remission (CR) and 23% in partial remission (PR). Sézary cells were cleared from the blood in 6 of 7 (86%) patients, and CR in lymph nodes was observed in 6 of 11 (55%) patients. The effect was better on erythroderma (OR, 69%) than on plaque or skin tumors (OR, 40%) and in patients who had received 1 to 2 previous regimens (OR, 80%) than in those who had received 3 or more prior regimens (OR, 33%). Itching, self-assessed on a 0 to 10 visual analog scale, was reduced from a median of 8 before treatment to 2 at end of therapy. Median time to treatment failure was 12 months (range, 5-32+ months). Cytomegalovirus (CMV) reactivation (causing fever without pneumonitis and responding to ganciclovir) occurred in 4 (18%) patients. Six additional patients had suspect or manifest infection (fever of unknown origin, 3; generalized herpes simplex, 1; fatal aspergillosis, 1). One patient had fatal Mycobacterium pneumonia at 10+ months. All serious infectious adverse events (except CMV) occurred in patients who had received 3 or more prior regimens. Progression of squamous cell skin carcinoma was noted in 1 patient. Alemtuzumab shows promising clinical activity and an acceptable safety profile in patients with advanced MF/SS, particularly in patients with erythroderma and severe itching and those who were not heavily pretreated.

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