Efficacy and safety of mogamulizumab by patient baseline blood tumour burden: a post hoc analysis of the MAVORIC trial
Authors
Cowan, Richard AScarisbrick, J. J.
Zinzani, P. L.
Nicolay, J. P.
Sokol, L.
Pinter-Brown, L.
Quaglino, P.
Iversen, L.
Dummer, R.
Musiek, A.
Foss, F.
Ito, T.
Rosen, J. P
Medley, M. C.
Affiliation
Christie Hospital Foundation NHS Trust, University of Manchester, UK.Issue Date
2021
Metadata
Show full item recordAbstract
Background: Mogamulizumab was compared with vorinostat in the phase 3 MAVORIC trial (NCT01728805) in 372 patients with relapsed/refractory mycosis fungoides (MF) or Sézary syndrome (SS) who had failed ≥1 prior systemic therapy. Mogamulizumab significantly prolonged progression-free survival (PFS), with a superior objective response rate (ORR) versus vorinostat. Objectives: This post hoc analysis was performed to evaluate the effect of baseline blood tumour burden on patient response to mogamulizumab. Methods: PFS, ORR, time to next treatment (TTNT), skin response (modified Severity-Weighted Assessment Tool [mSWAT]), and safety were assessed in patients stratified by blood classification (B0 [n=126], B1 [n=62], or B2 [n=184], indicating increasing blood involvement). Results: Investigator-assessed PFS was longer for mogamulizumab versus vorinostat across all blood classes; significantly so for B1 and B2 patients. ORR was higher with mogamulizumab than with vorinostat in all blood classification groups, and more markedly so with escalating B-class (B0: 15.6% vs 6.5%, P = 0.0549; B1: 25.8% vs 6.5%, P = 0.2758; B2: 37.4% vs 3.2%, P < 0.0001). TTNT was significantly longer for patients treated with mogamulizumab versus vorinostat with B1 (12.63 vs 3.07 months; HR 0.32 [95% CI 0.16-0.67]; P = 0.0018) and B2 (13.07 vs 3.53 months; HR 0.30 [95% CI 0.21-0.43]; P < 0.0001) blood involvement. In the mogamulizumab arm, 81 patients (43.5%) had ≥50% change in the mSWAT versus 41 patients (22.0%) with vorinostat; mSWAT improvements with mogamulizumab occurred most often in B1 and B2 patients. Rapid, sustained reductions were seen in CD4+ CD26- cell counts and CD4:CD8 ratios in mogamulizumab patients for all B-classes. Treatment-emergent adverse events were less frequent overall with mogamulizumab and similar in frequency regardless of B-class. Conclusions: This post hoc analysis indicates greater clinical benefit with mogamulizumab versus vorinostat in patients with MF and SS classified as having B1 and B2 blood involvement.Citation
Cowan R, Scarisbrick JJ, Zinzani PL, Nicolay JP, Sokol L, Pinter‐Brown L, et al. Efficacy and safety of mogamulizumab by patient baseline blood tumour burden: a post hoc analysis of the MAVORIC trial. Journal of the European Academy of Dermatology and Venereology. 2021 Jul 17.Journal
Journal of the European Academy of Dermatology and VenereologyDOI
10.1111/jdv.17523PubMed ID
34273208Additional Links
https://dx.doi.org/10.1111/jdv.17523Type
ArticleLanguage
enae974a485f413a2113503eed53cd6c53
10.1111/jdv.17523