Isatuximab, Lenalidomide, Bortezomib, and Dexamethasone Induction Therapy for Transplant-Eligible Newly Diagnosed Multiple Myeloma: Final Part 1 Analysis of the GMMG-HD7 Trial
Mené sur 662 patients atteints d'un myélome multiple récemment diagnostiqué et élégibles à une greffe autologue de cellules souches hématopoïétiques (durée médiane de suivi : 4 ans), cet essai randomisé multicentrique de phase III évalue l'efficacité, du point de vue de la survie sans progression et de la survie globale, d'un ajout d'isatuximab au traitement standard par lénalidomide-bortezomib-dexaméthasone
Résumé en anglais
Previously, addition of isatuximab (Isa) to standard-of-care lenalidomide-bortezomib-dexamethasone (RVd) in transplant-eligible patients with newly diagnosed multiple myeloma in the GMMG-HD7 trial (ClinicalTrials.gov identifier: NCT03617731) resulted in a significant increase of minimal residual disease negativity (MRD–) rates after induction therapy. A total of 662 patients were randomly assigned to receive induction therapy with Isa-RVd (n = 331) or RVd (n = 329), followed by single or tandem autologous stem-cell transplant and second random assignment to maintenance with lenalidomide alone or Isa-lenalidomide. We report updated results for part 1 from first random assignment to post-transplant. As of January 31, 2024, MRD– rates continued to deepen after transplant (66% Isa-RVd v 48% RVd). Isa-RVd induction therapy significantly prolonged progression-free survival (PFS) compared with RVd regardless of maintenance therapy (hazard ratio, 0.70 [95% CI, 0.52 to 0.95]; P = .0184). Weighted risk set estimator analysis accounting for second random assignment followed by maintenance with only lenalidomide confirmed a statistically significant benefit for Isa-RVd followed by lenalidomide maintenance versus RVd followed by lenalidomide maintenance (stratified weighted log-rank test P = .016). In conclusion, after 18-week induction therapy followed by transplant without consolidation therapy, adding Isa to RVd resulted in a significant PFS benefit, regardless of maintenance strategy.
