RT Journal Article SR Electronic T1 ECM-body: A cell-free 3D biomimetic scaffold derived from intact planarian body JF bioRxiv FD Cold Spring Harbor Laboratory SP 763714 DO 10.1101/763714 A1 Ekasit Sonpho A1 Chanida Wootthichairangsan A1 Miyuki Ishida A1 Takeshi Inoue A1 Kiyokazu Agata A1 Anchuleerat Maleehuan A1 Komgrid Charngkaew A1 Nusara Chomanee A1 Saengduen Moonsom A1 Patompon Wongtrakoongate A1 Arthit Chairoungdua A1 Puey Ounjai YR 2019 UL http://biorxiv.org/content/early/2019/09/11/763714.abstract AB Extracellular matrix (ECM) plays key roles in shaping fates of stem cells, not only by providing suitable niche but also by mediating physical and biochemical cues. Despite intensive investigations on regeneration, the roles of ECM on fate determination of stem cells in animal with great regenerative potency, such as planarian, remained unclear. Here, we developed a method to decellularizing and isolating extracellular matrix from planarians. Although the isolated scaffold appears translucent, it contains all the internal features, resembling the structure of intact planarian, and which we thus called “ECM-body”. Nuclear staining demonstrated that ECM-body contains very little or no cell remained. Histological sections displayed a well-preserved morphological integrity of the specimen. Scanning electron microscope showed porous surface on ECM-body, potentially suitable for housing cells. Furthermore, our preliminary experiment suggested that ECM-body can be utilized as biomimetic scaffold for cell culture as it may support survival of injected neoblasts.