High-Throughput Fingerprinting of Human Pluripotent Stem Cell Fate Responses and Lineage Bias Scientists developed a high-throughput platform to screen human pluripotent stem cells in configurable microenvironments in which they optimized colony size, cell density and other parameters to achieve rapid and robust cell fate responses to exogenous cues. [Nat Methods] Abstract | Press Release RNA Toxicity from the ALS/Frontotemporal Dementia C9ORF72 Expansion Is Mitigated by Antisense Intervention Induced pluripotent stem cell-differentiated neurons from C9ORF72 amyotrophic lateral sclerosis (ALS) patients revealed disease-specific intranuclear GGGGCCexp RNA foci, dysregulated gene expression, sequestration of GGGGCCexp RNA binding protein ADARB2, and susceptibility to excitotoxicity. [Neuron] Full Article | Press Release Screening Drug-Induced Arrhythmia Events Using Human Induced Pluripotent Stem Cell-Derived Cardiomyocytes and Low-Impedance Microelectrode Arrays Researchers tested whether human induced pluripotent stem cell-derived cardiomyocytes combined with a low-impedance microelectrode array system could improve on industry-standard preclinical cardiotoxicity screening methods, identified the effects of well-characterized drugs, and elucidated underlying risk factors for drug-induced arrhythmia. [Circulation] Abstract PRC2 Binds Active Promoters and Contacts Nascent RNAs in Embryonic Stem Cells Researchers report that PRC2 binds at low levels to a majority of promoters in mouse embryonic stem cells, including many that are active and devoid of H3K27me3. Using in vivo RNA-protein cross-linking, they showed that EZH2 directly binds the 5′ region of nascent RNAs transcribed from a subset of these promoters and that these binding events correlate with decreased H3K27me3. [Nat Struct Mol Biol] Abstract Alveolar Epithelial Differentiation of Human Induced Pluripotent Stem Cells in a Rotating Bioreactor Induced pluripotent stem cell-derived type II pneumocytes as well as native isolated human type II pneumocytes were differentiated toward a type I phenotype using a unique air-liquid interface system that relies on a rotating apparatus that mimics in vivo respiratory conditions. [Biomaterials] Abstract Identification of Chemicals Inducing Cardiomyocyte Proliferation in Developmental Stage-Specific Manner with Pluripotent Stem Cells Researchers investigated cardiovascular differentiation with pluripotent stem cells. The combination of stem cell and chemical biology can provide novel approaches to investigate the molecular mechanisms and manipulation of cardiomyocyte proliferation. [Circ Cardiovasc Genet] Abstract Nanofiber-Based In Vitro System for High Myogenic Differentiation of Human Embryonic Stem Cells Scientists present a novel approach to effectively enhance myogenic differentiation of human embryonic stem cells using aligned chitosan-polycaprolactone nanofibers constructed to resemble the microenvironment of the native muscle extracellular matrix in concert with Wnt3a protein. [Biomacromolecules] Abstract Generation of 3D Skin Equivalents Fully Reconstituted from Human Induced Pluripotent Stem Cells (iPSCs) Scientists developed a protocol for differentiating iPSCs into dermal fibroblasts, which also produce type VII collagen and therefore also have the potential to treat recessive dystrophic epidermolysis bullosa. [PLoS One] Full Article Generation of Neural Progenitors from Induced Bama Miniature Pig Pluripotent Cells Researchers report the generation of induced pig pluripotent cells using the induced pluripotent stem technology combination with valproic acid (VPA). VPA treatment significantly increased the expression of pluripotent genes and made an important roles in early reprogramming. [Reproduction] Abstract Generation of Robust Vascular Networks from Cardiovascular Blast Populations Derived from Human Induced Pluripotent Stem Cells In Vivo and Ex Vivo Organ Culture System Researchers induced human induced pluripotent stem cells to differentiate into heterogeneous cell populations which have abilities to form vascular vessel-like structures by recapitulating the embryonic process of vasculogenesis in vitro. [Biochem Biophys Res Commun] Abstract Generation of Glycosylphosphatidylinositol Anchor Protein-Deficient Blood Cells from Human Induced Pluripotent Stem Cells Using PIG-A gene targeting and an inducible PIG-A expression system, scientists have established, for the first time, a conditional PIG-A knockout model in human induced pluripotent stem cells that allows for the production of glycosylphosphatidylinositol anchored protein-deficient blood cells. [Stem Cells Transl Med] Abstract |