| Background | Obiltoxaximab (ETI-204, trade name Anthim) is an affinity-enhanced, chimeric IgG1 kappa monoclonal antibody (mAb) developed by Elusys Therapeutics and the US Department of Health and Human Services’ Biomedical Advanced Research and Development Authority (BARDA) for the prevention and treatment of inhalational anthrax due to Bacillus anthracis. Obiltoxaximab binds the protective antigen (PA) component of B. anthracis toxin. It has an approximate molecular weight of 148 kDa. Obiltoxaximab has been designed to neutralize the free protective antigen of B. anthracis, thereby inhibiting the lethal effects of anthrax toxins. In March 2016, intravenous obiltoxaximab was approved in the USA for the treatment (in combination with appropriate antibacterial drugs) and prophylaxis of inhalational anthrax. |
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