RESEARCH TRIANGLE PARK, NC and GENEVA--(Marketwire - December 11, 2008) - SCYNEXIS, Inc. and Drugs for Neglected Diseases initiative (DNDi) announced today that they have extended their collaboration on vital drug discovery research and development of affordable and effective therapies for human African trypanosomiasis (also known as sleeping sickness) for an additional three years. Sleeping sickness is one of the most devastating diseases in sub-Saharan Africa.