Directing Human Embryonic Stem Cell Differentiation towards a Renal Lineage Generates a Self-Organizing Kidney Researchers successfully directed the differentiation of human embryonic stem cells through posterior primitive streak and intermediate mesoderm under fully chemically defined monolayer culture conditions using growth factors used during normal embryogenesis. [Nat Cell Biol] Abstract | Press Release Characterizing the Strand-Specific Distribution of Non-CpG Methylation in Human Pluripotent Cells With the divide-and-compare strategy, scientists showed that CHG and CHH methylation are not intrinsically different in human embryonic stem cells and induced pluripotent stem cells. [Nucleic Acids Res] Abstract The Effects of Artificial E-Cadherin Matrix-Induced Embryonic Stem Cell Scattering on Paxillin and RhoA Activation via α-Catenin Investigators aimed to clarify the effect of cell scattering on the regulation of Rho family GTPases Rac1 and RhoA as well as paxillin. Allowing embryonic stem cells to spread and scatter on a synthetically designed E-cadherin substratum causes phosphorylation of paxillin on consensus phosphorylation sites leading to activation of Rac1 and inactivation of RhoA. [Biomaterials] Abstract The Polycomb Protein Ezh2 Impacts on iPS Cell Generation The authors investigated the impact of Ezh2, a core subunit of Polycomb repressive complex 2, on generation of induced pluripotent stem (iPS) cells. They found that Ezh2 expression is induced during iPS cell generation and iPS cells contain high levels of Ezh2 mRNA and protein. [Stem Cells Dev] Abstract Induced Pluripotent Stem Cells from Patients with Human Fibrodysplasia Ossificans Progressiva Show Increased Mineralization and Cartilage Formation Researchers created human induced pluripotent stem cells derived from normal and fibrodysplasia ossificans progressiva dermal fibroblasts by two separate methods, retroviral integration or integration-free episomal vectors. [Orphanet J Rare Dis] Abstract | Full Article Recellularization of Well Preserved Acellular Kidney Scaffold Using Embryonic Stem Cells After infusion of whole-kidney scaffolds with murine embryonic stem cells through the renal artery, and pressure-controlled perfusion with recirculating cell medium for 24 and 72 hours, seeded cells were almost completely retained into the organ and uniformly distributed in the vascular network and in glomerular capillaries without major signs of apoptosis. [Tissue Eng Part A] Abstract Improving Embryonic Stem Cell Expansion through the Combination of Perfusion and Bioprocess Model Design To characterize nutritional requirements, the expansion of undifferentiated murine embryonic stem cells encapsulated in hydrogels was performed in batch and perfusion cultures using bioreactors. [PLoS One] Full Article Synthetic Niches for Differentiation of Human Embryonic Stem Cells Bypassing Embryoid Body Formation Scientists describe the application of highly porous polymer scaffolds as synthetic stem cell niches. Bypassing the embryoid body formation step, these scaffolds are capable of three-dimensional culture of undifferentiated human embryonic stem cells and subsequent directed differentiation into three primary germ layers. [J Biomed Mater Res B Appl Biomater] Abstract In Vivo Reprogramming of Adult Somatic Cells to Pluripotency by Overexpression of Yamanaka Factors Researchers hypothesized that the reprogramming of somatic cells towards pluripotency could be achieved in vivo by gene transfer of reprogramming factors. In order to efficiently reprogram cells in vivo, high levels of the Yamanaka transcription factors need to be expressed at the target tissue. [J Vis Exp] Full Article | Press Release Small Molecule-Mediated Directed Differentiation of Human Embryonic Stem Cells toward Ventricular Cardiomyocytes By combining small molecules and growth factors, scientists developed a fully chemically defined, directed differentiation system to generate ventricular-like cardiomyocytes from human embryonic stem cells and induced pluripotent stem cells with high efficiency and reproducibility. [Stem Cells Transl Med] Abstract |