Matching-adjusted indirect comparison from the Lymphoma Epidemiology of Outcomes Consortium for Real World Evidence (LEO CReWE) study to a clinical trial of mosunetuzumab in relapsed or refractory follicular lymphoma

Matthew J. Maurer, Carla Casulo, Melissa C. Larson, Thomas M. Habermann, Izidore S. Lossos, Yucai Wang, Loretta J. Nastoupil, Christopher Strouse, Dai Chihara, Peter Martin, Jonathon B. Cohen, Brad S. Kahl, W. Richard Burack, Jean L. Koff, Yong Mun, Anthony Masaquel, Mei Wu, Michael C. Wei, Ashwini Shewade, Jia LiJames R. Cerhan, Brian K. Link, Christopher R. Flowers

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Mosunetuzumab is a novel bispecific antibody targeting epitopes on CD3 on T cells and CD20 on B cells with the goal of inducing T-cell mediated elimination of malignant B cells. A recent pivotal phase I/II clinical trial (GO29781) demonstrated that mosunetuzumab induced an overall response rate (ORR) of 80%, complete response (CR) rate of 60%, and a median progression-free survival (PFS) of 17.9 months in patients with relapsed/refractory (R/R) follicular lymphoma (FL) following at least two prior lines of systemic therapy, including alkylator and anti-CD20 antibody-based therapy. Historical data from cohorts receiving therapy for R/R FL can provide some context for interpretation of single-arm trials. We compared the results from the mosunetuzumab trial to outcomes from a cohort of patients with R/R FL from the LEO Consortium for Real World Evidence (LEO CReWE). We applied clinical trial eligibility criteria to the LEO CReWE cohort and utilized matching-adjusted indirect comparison weighting to balance the clinical characteristics of the LEO CReWE cohort with those from the mosunetuzumab trial. ORR (73%, 95% CI: 65-80%) and CR rates (53%, 95% CI: 45-61%) observed in the weighted LEO CReWE cohort were lower than those reported on the mosunetuzumab trial (ORR=80%, 95% CI: 70-88%; CR=60%, 95% CI: 49-70%, respectively). PFS at 12 months was similar in the weighted LEO CReWE (60%, 95% CI: 51-69%) and the mosunetuzumab (58%, 95% CI: 47-68%) trial. Sensitivity analyses examining the impact of matching variables, selection of line of therapy, and application of eligibility criteria provide context for best practices in this setting.

Original languageEnglish
Pages (from-to)2177-2185
Number of pages9
JournalHaematologica
Volume109
Issue number7
DOIs
StatePublished - Jul 2024

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