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Clinical application of obinutuzumab for treating chronic lymphocytic leukemia

Authors Luan C, Chen B

Received 16 April 2019

Accepted for publication 14 July 2019

Published 19 August 2019 Volume 2019:13 Pages 2899—2909


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Professor Jianbo Sun

Chunyan Luan, Baoan Chen

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

Correspondence: Baoan Chen
Department of Hematology and Oncology (Key Department of Jiangsu Medicine), Zhongda Hospital, School of Medicine, Southeast University, Dingjiaqiao 87, Gulou District, Nanjing, Jiangsu Province 210009, People’s Republic of China
Tel +86 258 327 2006
Fax +86 258 327 2011

Abstract: Alkylators and nucleoside analogs were the main drugs for treatingchronic lymphoblastic leukemia (CLL), which have been replaced by monoclonal antibodies, such as rituximab in the past 10 years for refractory or relapsed CLL.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. The obinutuzumab (GA101), an updated CD20 antibody, that is thought to achieve a more durable response with unique molecular and functional characteristics. Obinutuzumab is a humanized, monoclonal type II CD20 antibody modified by glycoengineering. The glycoengineered Fc portion enhances the binding affinity to the FcγRIII receptor on immune effector cells, resulting in increased antibody-dependent cellular cytotoxicity and phagocytosis. In addition, the type II antibody binding characteristics of obinutuzumab to CD20 lead to an efficient induction of direct non-apoptotic cell death. This review summarizes the results of clinical studies using obinutuzumab and looks forward to its further application in treating CLL clinically.

Keywords: CD20 antibody, GA101, obinutuzumab, chronic lymphocytic leukemia

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