Five Prime Therapeutics & Bristol-Myers Squibb Announce Exclusive Clinical Collaboration

Five Prime Therapeutics, Inc. and Bristol-Myers Squibb Company recently announced they have entered into an exclusive clinical collaboration agreement to evaluate the safety, tolerability, and preliminary efficacy of combining Opdivo (nivolumab), Bristol-Myers Squibb’s investigational PD-1 (programmed death-1) immune checkpoint inhibitor, with FPA008, Five Prime’s monoclonal antibody that inhibits colony stimulating factor-1 receptor (CSF1R). The Phase 1a/1b study will evaluate the combination of Opdivo and FPA008 as a potential treatment option for patients with non-small cell lung cancer (NSCLC), melanoma, head and neck cancer, pancreatic cancer, colorectal cancer, and malignant glioma. Bristol-Myers Squibb has proposed the name Opdivo, which, if approved by health authorities, will serve as the trademark for nivolumab.

Opdivo and FPA008 are part of a new class of cancer treatments known as immunotherapies that are designed to harness the body’s own immune system to fight cancer. Opdivo is approved in Japan for the treatment of patients with unresectable melanoma, and is being developed in multiple tumor types in more than 50 clinical trials. FPA008, in development as a potential treatment for rheumatoid arthritis (RA) and solid tumors, has initiated dosing for a Phase I clinical trial in RA. Preclinical data suggest that combining antibodies targeting PD-1 and CSF1R may lead to an enhanced anti-tumor immune response compared to either approach alone in treating cancer.

“This collaboration supports our strategy to expand the clinical development of Opdivo, including novel combination regimens and across numerous tumor types,” said Michael Giordano, Senior Vice President, Head of Development, Oncology, Bristol-Myers Squibb. “We are excited to build upon our existing relationship with Five Prime Therapeutics in immuno-oncology, and explore the full potential of Opdivo and FPA008 in multiple tumor types.”

“We are pleased to establish a second collaboration with Bristol-Myers Squibb in the area of immuno-oncology,” said Lewis T. “Rusty” Williams, MD, PhD, President and Chief Executive Officer of Five Prime. “Their vision aligns with our commitment to advancing promising immune-modulating targets, alone or in combination, to create next-generation immunotherapies for cancer patients. We look forward to initiating this study and expanding the development of FPA008 as a potential immunotherapy for these six types of cancer.”

Under the terms of this agreement, Bristol-Myers Squibb will make a one-time payment of $30 million to Five Prime and will be responsible for study costs. Five Prime will conduct the clinical trial, which is expected to begin in 2015. The agreement provides for exclusivity with respect to the development, with a collaborative partner, of combination regimens of anti-PD-1/PDL1 antagonists together with an anti-CSF1R antagonist. Bristol-Myers Squibb will have a time-limited right of first refusal subject to certain conditions if Five Prime wishes to seek a partner for FPA008.

Cancer cells may exploit “regulatory” pathways, such as checkpoint pathways, to hide from the immune system and shield the tumor from immune attack. Opdivo is an investigational, fully human PD-1 immune checkpoint inhibitor that binds to the checkpoint receptor PD-1 expressed on activated T-cells.

Bristol-Myers Squibb has a broad, global development program to study Opdivo in multiple tumor types consisting of more than 50 trials – as monotherapy or in combination with other therapies – in which more than 7,000 patients have been enrolled worldwide. Among these are several potentially registrational trials in NSCLC, melanoma, renal cell carcinoma (RCC), head and neck cancer, glioblastoma, and non-Hodgkin lymphoma (NHL).

In 2012, the FDA granted Fast Track designation for Opdivo in NSCLC, melanoma and RCC. In April 2014, the company initiated a rolling submission with the FDA for Opdivo in third-line pre-treated squamous cell NSCLC and expects to complete the submission by year-end. The FDA granted Opdivo Breakthrough Therapy Designation in May 2014 for the treatment of patients with Hodgkin lymphoma after failure of autologous stem cell transplant and brentuximab.

On July 4, Ono Pharmaceutical Co. announced that Opdivo received manufacturing and marketing approval in Japan for the treatment of patients with unresectable melanoma, making Opdivo the first PD-1 immune checkpoint inhibitor to receive regulatory approval anywhere in the world.

On September 26, Bristol-Myers Squibb announced that the FDA accepted for priority review the Biologics License Application for previously treated advanced melanoma, and the Prescription Drug User Fee Act goal date for a decision is March 30, 2015. The FDA also granted Opdivo Breakthrough Therapy status for this indication. In the European Union, the European Medicines Agency (EMA) has validated for review the Marketing Authorization Application (MAA) for Opdivo in advanced melanoma. The application has also been granted accelerated assessment by the EMA’s Committee for Medicinal Products for Human Use. The EMA also validated for review the MAA for Opdivo in NSCLC.

FPA008, an antibody that inhibits colony stimulating factor-1 receptor (CSF1R), blocks the activation and survival of monocytes and macrophages. Inhibition of CSF1R in inflamed RA joints blocks the production of inflammatory cytokines by macrophages and inhibits osteoclasts, monocyte-lineage cells that can cause bone ersoions and joint destruction. Inhibition of CSF1R in many cancers reduces the number of immunosuppressive tumor-associated macrophages (TAMs), thereby facilitating an immune response against tumors.

Five Prime Therapeutics, Inc. discovers and develops innovative therapeutics to improve the lives of patients with serious diseases. Five Prime’s comprehensive discovery platform, which encompasses virtually every medically relevant extracellular protein, positions it to explore pathways in cancer, inflammation, and their intersection in cancer immunotherapy, an area of oncology with significant therapeutic potential and a growing focus of the company’s R&D activities. Five Prime has entered into strategic collaborations with leading global pharmaceutical companies and has promising product candidates in clinical and late preclinical development. For more information, please visit www.fiveprime.com.