Five Prime Therapeutics, Inc. announced that it has achieved a milestone for the first Investigational New Drug (IND) application to the U.S. Food and Drug Administration by Bristol-Myers Squibb Company (BMS) for a therapeutic candidate under the immune checkpoint pathway discovery collaboration between the companies. The first clinical candidate from the collaboration is a fully-human monoclonal antibody targeting TIM-3 (T-cell immunoglobulin and mucin domain-3), an immune checkpoint receptor that is known to limit the duration and magnitude of T-cell responses. This first IND application triggers a $5 million milestone payment to Five Prime. Under the terms of the discovery collaboration agreement, BMS has exclusive, worldwide rights to develop and commercialize products directed toward certain protein targets in three checkpoint pathways. Five Prime is eligible to receive up to $300 million in future development, regulatory and sales-based milestone payments for each collaboration target, including TIM-3. Five Prime is also eligible to receive tiered royalties starting from mid-single-digit increasing to low-double-digit percentages of global net sales of each product commercialized by BMS. In addition, BMS has exercised its option to further extend the research term of the collaboration between the companies for the discovery, development and commercialization of immuno-oncology (I-O) therapies directed toward targets in two additional undisclosed immune checkpoint pathways. BMS has elected to extend the research term to March 2019 and will provide additional funding to Five Prime for the extended term. This is the second extension to the original collaboration term under the agreement that was established in March 2014. BMS will continue to utilize Five Prime's discovery capabilities to advance the immune checkpoint programs, including to identify and select drug candidates for preclinical development. Drug candidates developed against targets in these pathways may be studied either as single agents or in combination with approved BMS immuno-oncology therapies or others in development.