RegeneRx Biopharmaceuticals, Inc., a biopharmaceutical company, focuses on the discovery and development of novel molecules to promote tissue and organ repair. The company develops its product candidates based on Thymosin beta 4 (Tb4), a 43 amino acid peptide. Its product candidates in clinical development include RGN-137, a topically applied gel for chronic dermal wounds; RGN-259, a sterile topical eye drop for ophthalmic wounds; and RGN-352, a parenteral formulation for the treatment of patients with an acute myocardial infarction, or heart attack. Its pre-clinical development product includes RGN-457, an inhaled formulation of Tb4 targeting cystic fibrosis and other pulmonary diseases. The company has a strategic partnership with Defiante Farmaceutica L.d.a. for the development and marketing of RGN-137, and certain indications relating to RGN-352 primarily in Europe. RegeneRx Biopharmaceuticals was founded in 1982 and is headquartered in Rockville, Maryland.