🩸🔬 New Compound Identified with Potential for the Treatment of Hemophilia A 🔬🩸
The results of a study published in the *International Journal of Molecular Sciences* suggest a potential new compound for treating hemophilia A in patients for whom Factor VIII infusions cannot be used. The main complication in hemophilia A therapy is that many patients develop autoantibodies against the injected Factor VIII, which ultimately renders the treatment ineffective. Therefore, it is urgent to study the mechanisms of coagulation that will allow us to find new therapies for these patients. In this regard, researchers from the University of Cádiz (UCA) and Puerta del Mar Hospital (HUPM), affiliated with the Cádiz Institute for Biomedical Research and Innovation (INiBICA), in collaboration with researchers from Virgen del Rocío Hospital (HUVR) in Seville, have recently reported that certain phosphate polymers (polyphosphates) could form the basis for the design of new therapies to treat hemophilia A. In previous studies, the researchers had found that a blood factor known as von Willebrand factor (vWF) can be modulated by phosphate polymers (polyphosphates) that occur naturally in the body. In this study, it was determined that the modulation of FvW by polyphosphates occurs only in the absence of another blood factor, known as Factor VIII. Factor VIII is precisely the factor that is lacking in patients with hemophilia A. The Authors conducted experiments using plasma from healthy individuals, from patients with hemophilia A of varying severity, and from patients with different types of von Willebrand disease. They also studied molecular interactions in vitro, where they found that polyphosphate and FVIII compete to bind to FvW. These findings were published this week in the *International Journal of Molecular Sciences*. Based on the results obtained, the Authors suggest that polyphosphate—which is a natural coagulant—could be used in the design of new therapies to treat hemophilia A as a substitute for FVIII when the latter cannot be used, such as in patients who have developed autoantibodies. This work was carried out by the “Phosphate Metabolism” research group at UCA/HUPM/INiBICA, in close collaboration with faculty members from the Department of Biomedicine, Biotechnology, and Public Health (UCA) and the Department of Hematology at HUVR. The researchers involved were Marcela Montilla (HUPM, now a professor at the Cooperativa University of Colombia), Isabel Atienza-Navarro (HUPM/UCA), Francisco José García-Cozar (UCA), Carmen Castro (UCA), and Francisco Javier Rodríguez-Martorell (HUVR), led by Professor Félix A. Ruiz (Nutrition Division, UCA). Bibliographic Reference: Montilla, M.; Atienza-Navarro, I.; García-Cozar, F.J.; Castro, C.; Rodríguez-Martorell, F.J.; Ruiz, F.A. Polyphosphate Activates von Willebrand Factor Interaction with Glycoprotein Ib in the Absence of Factor VIII In Vitro. Int. J. Mol. Sci. 2022, 23, 14118. https://doi.org/10.3390/ijms232214118. 🔗 More information: Polyphosphate Activates von Willebrand Factor Interaction with Glycoprotein Ib in the Absence of Factor VIII In Vitro
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