Dissecting biological systems at the level of single cells
A major focus of technology development over the past years has been on increasing sensitivity to work with low cell numbers. The ultimate goal for many cell biologists is to assay cells individually. The desire to do so is in part fueled by the increasing appreciation of extensive heterogeneity in many tissues. For example, tumors are very heterogeneous, and often include not only different tumor cell clones, but also differentiated cells, infiltrating T-cells, macrophages, and fibroblasts. In the hematopoietic system, it has become apparent that even the most sophisticated flow cytometry sorting scheme has limits: highly purified hematopoietic stem cells still exhibit heterogeneous behaviors when assessed using single-cell transplantation assays (Dykstra et al., 2007; Kiel et al., 2005). In this blog, we will outline some of the most exciting developments and state-of-the-art technologies that stand to transform our understanding of tissue organization. Next Generation Sequ