Late-Breaking Abstracts - Malignant
Webcasts at the bottom
LBA-4 A Randomized Phase III Study of Ibrutinib (PCI-32765)-Based Therapy Vs. Standard Fludarabine, Cyclophosphamide, and Rituximab (FCR) Chemoimmunotherapy in Untreated Younger Patients with Chronic Lymphocytic Leukemia (CLL): A Trial of the ECOG-ACRIN Cancer Research Group (E1912)
Tait D. Shanafelt,et al.
CONCLUSIONS: The combination of ibrutinib and rituximab provides superior PFS and OS relative to FCR for patients with previously untreated CLL age ≤70. These findings have immediate practice changing implications and establish ibrutinib-based therapy as the most efficacious first-line therapy for patients with CLL.
LBA-2 Phase 3 Randomized Study of Daratumumab Plus Lenalidomide and Dexamethasone (D-Rd) Versus Lenalidomide and Dexamethasone (Rd) in Patients with Newly Diagnosed Multiple Myeloma (NDMM) Ineligible for Transplant (MAIA)
Thierry Facon, et al.
The addition of DARA to Rd in patients with transplant-ineligible NDMM significantly reduced the risk of progression or death by 45%. There are no new safety signals using DARA plus Rd in NDMM. These data together with the phase 3 ALCYONE study (D-VMP vs VMP) support the addition of DARA to standard of care combinations in patients with NDMM ineligible for transplant.
LBA-7 Acquisition of the Recurrent Gly101Val Mutation in BCL2 Confers Resistance to Venetoclax in Patients with Progressive Chronic Lymphocytic Leukemia
Piers Blombery, et al.
In conclusion, we have identified and functionally characterized a novel recurrent BCL2 mutation (Gly101Val) emerging in a cohort of patients with CLL-type progressions treated with venetoclax. The BCL2 Gly101Val impairs binding of venetoclax to BCL2, confers resistance to venetoclax in both patient leukemia cells and engineered cell lines, and provides a selective growth advantage over wild-type cells when maintained in the presence of the drugin vitro. This mutation provides new insights into the pathobiology of venetoclax resistance and provides a potential biomarker of impending clinical relapse.