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This recombinant fibrinogen variant is a preclinical-stage engineered protein developed by Fibriant for the treatment of methicillin-resistant Staphylococcus aureus (MRSA) bacteremia. Unlike traditional antibiotics, this specific variant (identified as fibrinogen γ′-γ′) utilizes host-defense properties to improve survival in systemic infection models. The protein is produced using a proprietary recombinant manufacturing platform involving Chinese hamster ovary (CHO) cell expression technology. Research indicates that the engineered variant enhances the host's innate immune response and clotting-related defense mechanisms against S. aureus, rather than exerting direct antimicrobial activity. In animal models of bacteremia, the drug is administered systemically, typically via intravenous injection.
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