2:30 PM. 297. Nanoparticles Induce Differentiation of Monocytes into Antigen-Presenting Monocyte-Derived Dendritic Cells in Murine Triple Negative Breast Cancer.Kate Griffin, BS, MS1, Jeffrey Ma, BS, PhD1, Kathryn Kang, BS, MS1, Agustina Diener, BS1, Rebecca Pereles, BS, MS1, Jacqueline Jeruss, MD, PhD1, Lonnie Shea2 1University of Michigan- Ann Arbor, 2University of Michigan