Health-related quality of life effect of mogamulizumab by patient blood involvement

Context Cutaneous T-cell lymphomas (CTCLs) are rare non-Hodgkin lymphomas that present in skin and include mycosis fungoides (MF) and Sezary syndrome (SS) subsets. Leukemic involvement is an independent prognostic factor affecting overall and disease-specific survival and increasing the risk of disease progression (Agar 2010, Am Soc J Clin Oncol). CTCL has serious negative effects on patient quality of life (QoL). Therefore, treatment goals include reducing the burden of disease, delaying progression, and improving or preserving QoL. Objective This post hoc analysis of MAVORIC trial data sought to determine whether baseline blood tumor burden affected treatment effects on patient QoL. Design The Phase 3 MAVORIC trial (NCT01728805) compared vorinostat 400 mg daily PO to mogamulizumab 1.0 mg/kg weekly for the first 28-day cycle, then on days 1 and 15 of subsequent cycles. Patient-reported outcome (PRO) analysis of health-related QoL (HRQoL) was performed using the validated Skindex-29 and FACT-G (Functional Assessment of Cancer Therapy-General) instruments. Pruritus was assessed using ItchyQoL and Pruritus Likert scales. All PROs were administered at baseline; Skindex-29 and FACT-G were then administered at every other treatment visit (Cycle 1, 3, 5, …), and ItchyQoL and Pruritus Likert scales were administered every 4 weeks at each cycle. Results Overall, no statistically significant differences between mogamulizumab and vorinostat were seen for patients without blood involvement. Statistically significant differences were seen for patients with blood involvement, with mogamulizumab-treated patients seeing statistically significant improvement in Skindex-29 for treatment Cycles 3–11 in all domains (emotional, functional, symptoms) and in the functional domain of ItchyQoL at most time points. In mogamulizumab-treated patients with blood involvement, the Pruritus Likert Scale score showed a reduction in itch from Cycle 1 and a trend toward reducing levels of itch over 12 cycles. The FACT-G Total Score showed the greatest improvement from baseline for mogamulizumab-treated patients with blood involvement compared to those without blood involvement and all vorinostat-treated patients. Conclusions Mogamulizumab patients with blood involvement saw greater HRQoL improvement than those without blood involvement. Mogamulizumab offers QoL benefit, assessed across a number of PROs, especially to patients with blood involvement (B1 or B2). Supported by Kyowa Kirin, Inc.