Antagonistic Human FcγRIIB (CD32B) Antibodies Have Anti-Tumor Activity and Overcome Resistance to Antibody Therapy In Vivo.
Author
Summary, in English
Therapeutic antibodies have transformed cancer therapy, unlocking mechanisms of action by engaging the immune system. Unfortunately, cures rarely occur and patients display intrinsic or acquired resistance. Here, we demonstrate the therapeutic potential of targeting human (h) FcγRIIB (CD32B), a receptor implicated in immune cell desensitization and tumor cell resistance. FcγRIIB-blocking antibodies prevented internalization of the CD20-specific antibody rituximab, thereby maximizing cell surface accessibility and immune effector cell mediated antitumor activity. In hFcγRIIB-transgenic (Tg) mice, FcγRIIB-blocking antibodies effectively deleted target cells in combination with rituximab, and other therapeutic antibodies, from resistance-prone stromal compartments. Similar efficacy was seen in primary human tumor xenografts, including with cells from patients with relapsed/refractory disease. These data support the further development of hFcγRIIB antibodies for clinical assessment.
Department/s
- Lymphoma - Clinical Research
- Myeloma research group
- Division of Hematology and Transfusion Medicine
- BioCARE: Biomarkers in Cancer Medicine improving Health Care, Education and Innovation
Publishing year
2015
Language
English
Pages
473-488
Publication/Series
Cancer Cell
Volume
27
Issue
4
Links
Document type
Journal article
Publisher
Cell Press
Topic
- Cancer and Oncology
Status
Published
Research group
- Lymphoma - Clinical Research
- Myeloma research group
ISBN/ISSN/Other
- ISSN: 1878-3686