Product Name

Ofatumumab

Name: Ofatumumab
SKU: 679818-59-8

CAS Number

679818-59-8

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Product Name:

Ofatumumab

CAS Number:

679818-59-8

Indication:

Ofatumumab is indicated for the treatment of patients with chronic lymphocytic leukemia (CLL) refractory to fludarabine and alemtuzumab.

Mode of Action:

Ofatumumab binds specifically to both the small and large extracellular loops of the CD20 molecule. The CD20 molecule is expressed on normal B lymphocytes (pre-B- to mature B-lymphocyte) and on B-cell CLL. The CD20 molecule is not shed from the cell surface and is not internalized following antibody binding. The Fab domain of ofatumumab binds to the CD20 molecule and the Fc domain mediates immune effector functions to result in B-cell lysis in vitro. Data suggest that possible mechanisms of cell lysis include complement-dependent cytotoxicity and antibody-dependent, cell-mediated cytotoxicity.

Pharmacodynamics:

In patients with CLL refractory to fludarabine and alemtuzumab, the median decrease in circulating CD19-positive B cells was 91% (n = 50) with the 8th infusion and 85% (n = 32) with the 12th infusion. The time to recovery of lymphocytes, including CD19-positive B cells, to normal levels has not been determined.

ATC:

L01XC10

DrugBank:

DB06650

Formula:

C6480H10022N1742O2020S44

Molecular Mass:

146100.0 Da

Synonyms:

Arzerra, Arzerra Injection, GSK 1841157, GSK1841157, HSDB 8170, HuMax-CD20, HuMax-CD20, 2F2, Immunoglobulin G1, anti-(human CD20 (antigen))(human monoclonal HuMax-CD20 heavy chain), disulfide with human monoclonal HuMax-CD20 kappa-chain, dimer, Ofatumumab, UNII-M95KG522R0

General Reference:

Lin TS: Ofatumumab: a novel monoclonal anti-CD20 antibody. Pharmgenomics Pers Med. 2010;3:51-9. Epub 2010 May 10. [PubMed:23226042 ]
Dorner T, Burmester GR: New approaches of B-cell-directed therapy: beyond rituximab. Curr Opin Rheumatol. 2008 May;20(3):263-8. doi: 10.1097/BOR.0b013e3282f5e08d. [PubMed:18388516 ]
Glennie MJ, French RR, Cragg MS, Taylor RP: Mechanisms of killing by anti-CD20 monoclonal antibodies. Mol Immunol. 2007 Sep;44(16):3823-37. [PubMed:17768100 ]
Du J, Yang H, Guo Y, Ding J: Structure of the Fab fragment of therapeutic antibody Ofatumumab provides insights into the recognition mechanism with CD20. Mol Immunol. 2009 Jul;46(11-12):2419-23. doi: 10.1016/j.molimm.2009.04.009. Epub 2009 May 8. [PubMed:19427037 ]

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Ofatumumab

679818-59-8

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