Hemophilia is an inherited blood clotting disorder. Individuals with hemophilia A require intravenous infusion of recombinant Factor VIII clotting protein to make their blood clot properly. Researchers at Harvard University have identified a protein called P-selectin as being important in blood clotting. The researchers believe that altering P-selectin levels in the bloodstream by intravenous infusion may have great therapeutic potential as an easier and more effective approach to treating hemophilia. The research was presented at the XXth Congress of the International Society on Thrombosis & Hemostasis in August 2005.