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Ligand Pharmaceuticals, Inc.

Drug Names(s): Totrombopag

Description: SB-559448 is a small-molecule drug that mimics the activity of thrombopoietin (TPO), a protein factor that promotes growth and production of blood platelets.

Deal Structure: The GSK-Ligand collaboration began in 1995 to capitalize on Ligand's Signal Transducers and Activators of Transcription (STAT) technology to discover small molecule drugs to control hematopoiesis and treat patients with cancer, anemia or platelet deficiencies. The research phase of the collaboration ended in 2001. GSK is responsible for the development and registration of products resulting from the collaboration, and Ligand may earn milestone payments of up to $8 million. GSK has exclusive worldwide marketing rights to products resulting from the research, and will pay Ligand royalties on a sliding scale up to low double digits on sales of products that make it to market.

Partners: GlaxoSmithKline plc

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