Ofatumumab (Arzerra)

General information

Class/mechanism: Anti-CD20 monoclonal antibody that binds to small and large extracellular loops of the CD20 molecule which is expressed on B-cells. The Fc domain of ofatumumab has been observed in vitro to mediate immune effector functions and B-cell lysis, which is hypothesized to involve complement-dependent cytotoxicity (CDC) and/or antibody-dependent cell mediated cytotoxicity (ADCC).
Route: IV
Extravasation: no information

For conciseness and simplicity, HemOnc.org currently will focus on treatment regimens and not list information such as: renal/hepatic dose adjustments, metabolism (including CYP450), excretion, monitoring parameters (although this will be considered for checklists), or manufacturer. Instead, for the most current information, please refer to your preferred pharmacopeias such as Micromedex, Lexicomp, UpToDate (courtesy of Lexicomp), or the prescribing information.

Diseases for which it is used

• Chronic lymphocytic leukemia (CLL) and Small lymphocytic lymphoma (SLL)
• Diffuse large B-cell lymphoma
• Follicular lymphoma
• Hodgkin lymphoma
• Waldenström macroglobulinemia

Patient drug information

• Ofatumumab (Arzerra) patient drug information (Chemocare)
• Ofatumumab (Arzerra) patient drug information (UpToDate)

History of changes in FDA indication

• 10/26/2009: Granted FDA accelerated approval for the treatment of patients with chronic lymphocytic leukemia (CLL) refractory to Fludarabine (Fludara) and Alemtuzumab (Campath)
• 4/17/2014: FDA approved in combination with Chlorambucil (Leukeran), for the treatment of previously untreated patients with chronic lymphocytic leukemia (CLL), for whom fludarabine-based therapy is considered inappropriate.
• 1/19/2016: Approval expanded "for extended treatment of patients who are in complete or partial response after at least two lines of therapy for recurrent or progressive chronic lymphocytic leukemia (CLL)."

Also known as

HuMax-CD20.