Ofatumumab

Specification

• Cat#: THA-0047
• Product Name: Ofatumumab
• Description: Ofatumumab is an anti-CD20 antibody used for the treatment of chronic lymphocytic leukemia (CLL) in selected patients with certain treatment histories and responsiveness to anticancer medications.
• Sequences: Ofatumumab Heavy Chain: EVQLVESGGGLVQPGRSLRLSCAASGFTFNDYAMHWVRQAPGKGLEWVSTISWNSGSIGYADSVKGRFTISRDNAKKSLYLQMNSLRAEDTALYYCAKDIQYGNYYYGMDVWGQGTTVTVSSASTKGPSVFPLAPGSSKSTSGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEP Ofatumumab Light Chain: EIVLTQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPITFGQGTRLEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNR
• Molecular Weight: 146100.0 Da
• Introduction: Ofatumumab is a novel anti-CD20 monoclonal antibody that targets B-cells. It is an IgG1κ human monoclonal antibody produced from a recombinant murine cell line (NS0) via transgenic mouse and hybridoma technology. Ofatumumab works by recognizing antigens that are expressed on the tumour cells in certain cancers; however, the antigen is not tumour-specific and can also be found in normal B-cells. Ofatumumab was first approved by the FDA in 2009. It is used in the treatment of recurrent, progressive, or recurrent chronic lymphocytic leukemia (CLL) or CLL in treatment-naive patients in whom fludarabine-based therapy is considered inappropriate. Ofatumumab is used as monotherapy or in combination with other medications, depending on the patient profile and previous treatment history. Although it has a similar molecular Mechanism of action as rituximab, another CD-20 monoclonal antibody used in the treatment of rheumatoid arthritis and B-cell non-Hodgkin's lymphoma, ofatumumab has a higher affinity towards CD20. Ofatumumab is available for intravenous administration and is marketed as Arzerra. In Phase III clinical trials consisting of subjects with relapsing forms of multiple sclerosis (RMS), subcutaneous administration of ofatumumab reduced the number of relapses and delayed disease progression. In February 2020, FDA and EMA approved Supplemental Biologics License Application (sBLA) and Marketing Authorization Application (MAA), respectively, for ofatumumab for the treatment of RMS in adults. The FDA subsequently approved ofatumumab for the treatment of RMS on August 20, 2020. The potential therapeutic use of ofatumumab in various lymphomas and rheumatoid arthritis has also been investigated.
• Purity: >99% by SDS-Page and HPLC analysis
• Formula: C6480H10022N1742O2020S44
• Appearance: Liquid
• Endotoxin Level: < 0.001 EU/μg of the protein by the LAL method

Pharmaceutical Information

• Pharmacodynamics: Ofatumumab works by binding to and blocking the action of CD-20, a molecule expressed on the surface of both healthy and leukemic B lymphocytes. In patients with previously untreated chronic lymphocytic leukemia (CLL), ofatumumab caused B-cell depletion in the peripheral blood after six months following the last dose. However, observable depletion of B cells in the peripheral blood does not directly correlate with the depletion of B-cells in solid organs or malignant tumours. In vitro, ofatumumab induces complement-dependent cytotoxicity (CDC) and antibody-dependent cellular cytotoxicity (ADCC).
• Targets: B-lymphocyte antigen CD20