Gilead Sciences, Inc. and MiroBio, a privately-held U.K.-based biotechnology company focused on restoring immune balance with agonists targeting immune inhibitory receptors, have entered into a definitive agreement under which Gilead will acquire MiroBio for approximately $405 million in cash, subject to customary adjustments.
 
The acquisition adds MiroBio’s discovery platform and portfolio of immune inhibitory receptor agonists. MiroBio’s lead investigational antibody, MB272, is a selective agonist of immune inhibitory receptor B- and T-Lymphocyte Attenuator (BTLA) in Phase 1 clinical trials. MB272 targets T, B and dendritic cells to inhibit or blunt activation and suppress an inflammatory immune response.
 
MiroBio’s I-ReSToRE platform (REceptor Selection and Targeting to Reinstate immune Equilibrium) has the potential to be used to develop best-in-class agonist antibodies targeting immune inhibitory receptors, a novel approach to the treatment of inflammatory diseases. The I-ReSToRE platform supports identification and development of therapeutics that use inhibitory signaling networks with the goal of restoring immune homeostasis. Gilead anticipates advancing additional agonists derived from MiroBio’s I-ReSToRE platform, including a PD-1 agonist, MB151, and other undisclosed early-stage programs, over the next several years.
 
“The team at MiroBio has spearheaded foundational research for agonist antibodies following a rigorous scientific approach,” said Flavius Martin, Executive Vice President, Research, Gilead Sciences. “We believe that MiroBio’s unique platform technology has the potential to produce best-in-class agonist antibodies targeting immune inhibitory receptors.”
 
“We are excited to be joining Gilead,” said Eliot Charles, Chairman of MiroBio. “MiroBio has a deep understanding of checkpoint receptor signaling and a proprietary approach to select and generate superior agonist antibodies. Combining this with Gilead’s drug development and therapeutic area expertise will allow us to fully explore the potential of checkpoint agonist antibodies for patients with autoimmune disease.”