The Effect of Daratumumab, Lenalidomide, Dexamethasone (drd) on Peripheral Blood Stem Cell Mobilisation (PBSC)

Peripheral blood stem cell (PBSC) mobilisation in multiple myeloma (MM) patients after exposure to daratumumab (D), a CD38 targeting monoclonal antibody, produces a lower stem cell yield possibly due to an effect on CD34+ stem cells (Hulin et al., 2021). Similarly, the GRIFFIN study reported greater plerixafor usage to facilitate PBSC mobilisation in patients randomised to DARA-Velcade, Lenalidomide and Dexamethasone (D-VRd) when compared to VRd (Voorhees et al., 2020). In addition, R use has previously been shown to impact adversely on PBSC yields (Kumar et al., 2007) with a recommendation to use cyclophosphamide (cyclo) assisted mobilisation for this group of patients (Mazumder et al., 2008). In this context there remains uncertainty about the role of plerixafor, compared to chemotherapy assisted mobilisation.