Modeling a Genetic Risk for Schizophrenia in Induced Pluripotent Stem Cells and Mice Reveals Neural Stem Cell Deficits Associated with Adherens Junctions and Polarity Scientists demonstrate that human induced pluripotent stem cells-derived neural progenitors carrying 15q11.2 microdeletion exhibit deficits in adherens junctions and apical polarity. This results from haploinsufficiency of CYFIP1, a gene within 15q11.2 that encodes a subunit of the WAVE complex, which regulates cytoskeletal dynamics. [Cell Stem Cell] Full Article | Graphical Abstract | Press Release Targeted Gene Correction Minimally Impacts Whole-Genome Mutational Load in Human-Disease-Specific Induced Pluripotent Stem Cell Clones Researchers performed whole-genome sequencing to evaluate the mutational load at single-base resolution in individual gene-corrected human induced pluripotent stem cell clones in three different disease models. [Cell Stem Cell] Abstract | Graphical Abstract Efficient Germ-Line Transmission Obtained with Transgene-Free Induced Pluripotent Stem Cells Scientists report the use of optimized assemblies of reprogramming factors and selection markers incorporated into single plasmids as nonintegrating episomes to generate germ-line-competent induced pluripotent stem cells. [Proc Nat Acad Sci USA] Abstract | Full Article Generation of Induced Pluripotent Stem Cells from Virus-Free In Vivo Reprogramming of BALB/c Mouse Liver Cells The in vivo cell reprogramming of terminally differentiated somatic cells to a pluripotent state by the ectopic expression of defined transcription factors has been previously shown in the BALB/c mouse liver upon plasmid DNA injection with no teratoma formation in the host tissue. Scientists demonstrate that the reprogrammed cells could be extracted from the tissue and cultured in vitro. [Biomaterials] Abstract Stochastic NANOG Fluctuations Allow Mouse Embryonic Stem Cells to Explore Pluripotency Researchers used a novel fluorescent reporter to investigate the temporal dynamics of NANOG expression in mouse embryonic stem cells (mESCs), and to dissect the lineage potential of mESCs at different NANOG states. [Development] Abstract RBM20-Dependent Regulation of Organized Myofilament Structure and Titin Splicing in Induced Pluripotent Stem Cell-Derived Cardiomyocytes from Patients with Dilative Cardiomyopathy Investigators generated induced pluripotent stem cell (iPSCs) from dilated cardiomyopathy (DCM) patients with a RNA-binding motif 20 (RBM20) mutations, and analyzed the functionality and cell biology of cardiomyocytes derived from these patient-specific iPSCs with regard to the cardiac DCM phenotype. [Cardiovasc Res] Abstract Human Transgene-Free Amniotic Fluid-Derived Induced Pluripotent Stem Cells for Autologous Cell Therapy Scientists found that human amniotic fluid mesenchymal stromal cells could be easily reprogrammed into induced pluripotent stem cells using non-integrating Sendai viral vectors encoding for OCT4, SOX2, KLF4, and cMYC. [Stem Cells Dev] Abstract Paradoxical Role of DNA Methylation in Activation of FoxA2 Gene Expression During Endoderm Development To elucidate the mechanisms underlying the activation of the FoxA2 gene during differentiation, researchers compared the epigenetic status of undifferentiated human embryonic stem cells (hESCs), hESC-derived early endoderm stage cells and pancreatic islet cells. [J Biol Chem] Abstract | Full Article Functional Characterization of Friedreich Ataxia iPS-Derived Neuronal Progenitors and Their Integration in the Adult Brain Researchers demonstrate that neural derivatives of Friedreich ataxia induced pluripotent stem (iPS) cells are able to differentiate into functional neurons, which don’t show altered susceptibility to cell death, and have normal mitochondrial function. [PLoS One] Full Article |