alexa Results of a phase I II study of ocrelizumab, a fully humanized anti-CD20 mAb, in patients with relapsed refractory follicular lymphoma.
Oncology

Oncology

Journal of Cancer Science & Therapy

Author(s): Morschhauser F, Marlton P, Vitolo U, Lindn O, Seymour JF,

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Abstract BACKGROUND: Ocrelizumab is a humanized anti-CD20 antibody with increased antibody-dependent cellular cytotoxicity compared with rituximab. This phase I/II study evaluated its safety and efficacy in patients with relapsed/refractory follicular lymphoma (FL) after prior rituximab therapy. DESIGN AND METHODS: Forty-seven patients were treated in three dose cohorts and received eight infusions every 3 weeks: cohort A, 200 mg/m(2) (n = 15); cohort B, 375 mg/m(2) (n = 16); cohort C, first dose 375 mg/m(2), seven subsequent doses of 750 mg/m(2) (n = 16). Patients were assessed for safety, efficacy, pharmacodynamics and pharmacokinetics. RESULTS: The median patient age was 58 years, the majority had Ann Arbor stage III/IV disease and had received a median of 2 (range 1-6) prior regimens. Ocrelizumab was well tolerated with grade 3/4 toxicity occurring in 9\% of patients. The most common toxicity was infusion-related reactions (74\% patients), all grade 1/2 except one grade 3 event. The objective response rate was 38\% and was similar in patients with low-affinity and high-affinity variants of the Fcgamma receptor IIIa (FcgammaRIIIa). With follow-up of approximately 28 months, the median progression-free survival was 11.4 months. CONCLUSION: Ocrelizumab demonstrated activity in patients with relapsed/refractory FL following prior rituximab treatment, with safety similar to rituximab although adverse events appeared milder. This article was published in Ann Oncol and referenced in Journal of Cancer Science & Therapy

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