FRAMINGHAM, Mass.--(BUSINESS WIRE)--GTC Biotherapeutics, Inc. ("GTC", Nasdaq: GTCB) announced today that the market authorization of ATryn® for the prophylaxis of venous thromboembolism in surgery of patients with congenital antithrombin deficiency has been transferred to its distribution and development partner, LEO Pharma A/S, following approval by the European Commission. ATryn® is a recombinant form of human antithrombin. Antithrombin is normally found in human plasma and has both anticoagulant and anti-inflammatory properties. The approval of the transfer of the market authorization enables LEO to enter into negotiation of reimbursement rates as part of preparing for the commercial launch of ATryn® in Europe on a country-by-country basis. The initial launch is being planned for around the end of the second quarter 2007.
