CAMBRIDGE, Mass.--(BUSINESS WIRE)--Cerulean Pharma Inc., a biopharmaceutical company focused on novel intelligently designed nanoparticle-based drugs, today announced the appointment of John Ryan, Ph.D., M.D., to serve as Senior Vice President, Chief Medical Officer and the appointment of Karen Roberts to serve as Senior Vice President, Finance and Administration. Both appointments are newly established roles that reflect Cerulean’s growth and are effective immediately.