Abstract

“Bone Marrow-on-a-Chip”: Replicating Hematopoiesis and Investigating the Impact of Ionizing Radiation

Steven C. George, Professor, University of California, Davis

Tissue engineering holds enormous potential to not only replace or restore function to a wide range of tissues, but also to capture and control 3D physiology in vitro (e.g., microphysiological systems or “organ-on-a-chip” technology).  The latter has important applications in the fields of drug development, toxicity screening, modeling tumor metastasis, and repairing damaged cardiac (heart) muscle. In order to replicate the complex 3D arrangement of cells and extracellular matrix (ECM), new human microphysiological systems must be developed.  The past decade has brought tremendous advances in our understanding of stem cell technology and microfabrication producing a rich environment to create an array of “organ-on-a-chip” designs.  Over the past six years we have developed novel microfluidic-based systems of 3D human microtissues (~ 1 mm³) that contain features such as perfused human microvessels, primary human cancer, mouse tumor organoids, stem cells, and spatiotemporal control of oxygen.  The technologies are part of two early start-up companies, Kino Biosciences and Immunovalent Therapeutics, based in Irvine, CA and St. Louis, MO.  This seminar will describe our approach to create a 3D in vitro model of human bone marrow to assess the impact of ionizing radiation.