Scaffold-free cell-based systems

Cover illustration Scaffold-free cell-based systems. This issue of BTJ, edited by Umut Gurkan (Harvard Medical School, MA, USA) and Feng Xu (Xi' an Jiaotong University, China) highlights several applications of scaffold-free systems such as cell therapies for tissue regeneration, in vitro functional tissue and disease models for drug sensitivity testing, cell-based biosensors, and drug delivery. Cover image: Confocal image of a microtissue generated from human colorectal carcinoma cell line, HCT-116, stained for integrin, 1 (green), cytoskeleton (red) and nuclei (blue). Image: Irina Agarkova (InSphero AG, Zurich, Switzerland). See the article by Drewitz et al., http://dx.doi.org/10.1002/biot.201100290