Isatuximab, bortezomib, lenalidomide, and limited dexamethasone in patients with transplant-ineligible multiple myeloma (REST): a multicentre, single-arm, phase 2 trial.

Background: Adding anti-CD38 monoclonal antibodies to standard therapies can improve outcomes in patients with multiple myeloma. Long-term treatment with corticosteroids increases the risk of infection. We aimed to evaluate the safety and activity of isatuximab, weekly bortezomib, lenalidomide, and limited dexamethasone in patients with newly diagnosed multiple myeloma ineligible for autologous haematopoietic stem-cell transplantation (HSCT).