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The GA101 (obinutuzumab) monocLonal Antibody as Consolidation Therapy In chronic lymphocytic leukaemia (CLL) (GALACTIC) was a seamless phase II/III trial designed to test whether consolidation with obinutuzumab is safe and eradicates minimal residual disease (MRD) and, subsequently, whether this leads to prolonged progression-free survival (PFS) in patients with CLL who have recently responded to chemo-immunotherapy. Patients with a response 3-24 months after chemotherapy were assessed for MRD. MRD-positive patients were randomised to receive consolidation therapy with obinutuzumab or no consolidation.

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In the randomized phase 3 GALLIUM trial, first-line treatment with obinutuzumab (GA101; G) plus chemotherapy (G + chemo) resulted in superior progression-free survival (PFS) compared with rituximab plus chemotherapy (R + chemo) for patients with follicular lymphoma (FL). G + chemo was found to be cost-effective when compared with R + chemo (incremental cost-effectiveness ratio [ICER] of approximately $2,300 per quality-adjusted life-year [QALY] gained). Two rituximab biosimilars, rituximab-abbs (Ra) and rituximab-pvvr (Rp), have been approved by the FDA for use in this setting.

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Clinical application of obinutuzumab for treating chronic lymphocytic leukemia.

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March 2020

Department of Hematology and Oncology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu Province 210009, People's Republic of China.

Alkylators and nucleoside analogs were the main drugs for treatingchronic lymphoblastic leukemia (CLL), which have been replaced by monoclonal antibodies, such as rituximab in the past 10 years for refractory or relapsed CLL. The first-line immunochemotherapy regimen, rituximab combined with nucleoside analogs, significantly increased CLL patients' first-reaction rate and improved progression-free survival. Despite the long-lasting remissions by the use of chemoimmunotherapy, most CLL patients will relapse eventually.

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Impact of obinutuzumab alone and in combination for follicular lymphoma.

Blood Lymphat Cancer

October 2017

Division of Hematology-Oncology, Georgetown University Hospital, Lombardi Comprehensive Cancer Center, Washington, DC, USA,

Although rituximab-based chemoimmunotherapy prolongs the survival of patients with follicular lymphoma (FL), this disease is considered incurable in most patients. Thus, new therapies are needed not only for those in the relapsed/refractory setting, but also for initial treatment. Obinutuzumab (G, GA101) is a third-generation, fully humanized type II glycoengineered, anti-CD20 monoclonal antibody that results in increased direct cell death and antibody-dependent, cell-mediated cytotoxicity/phagocytosis compared to rituximab.

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For decades, treatment of chronic lymphocytic leukemia (CLL) has been based on chemotherapy. This changed when the first CD20 antibody rituximab was introduced. Since 2008, the combination of chemotherapy and CD20 antibodies has become the standard of care for most patients, and a significant fraction of patients had very long-lasting remissions after chemoimmunotherapy.

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