SCIENCE NEWS Physicist the First to Measure Energy Released from a Virus During Infection Physicist Alex Evilevitch has directly measured the energy associated with the expulsion of viral DNA, a pivotal discovery toward fully understanding the physical mechanisms that control viral infection and designing drugs to interfere with the process. [Press release from Carnegie Mellon discussing the online prepublication in the Journal of Molecular Biology] 3-D Scaffold Provides Clean, Biodegradable Structure for Stem Cell Growth Material scientists have built a three-dimensional scaffold out of a natural material that mimics the binding sites for stem cells, allowing the cells to reproduce on a clean, biodegradable structure. [Press release from the University of Washington discussing the online prepublication in Biomaterials] Growing Cartilage – No Easy Task Northwestern University researchers are the first to design a bioactive nanomaterial that promotes the growth of new cartilage in vivo and without the use of expensive growth factors. [Press release from Northwestern University discussing the online prepublication in the Proceedings of the National Academy of Sciences] Transforming Human Fat into Stem Cells Using Virus-Free Technique Tiny circles of DNA are the key to a new and easier way to transform stem cells from human fat into induced pluripotent stem cells for use in regenerative medicine. [Press release from Science Daily discussing the online prepublication in Nature Methods] To Restore Vision, Implant Preps and Seeds a Damaged Eye Researchers trying to restore vision damaged by disease have found promise in a tiny implant that sows seeds of new cells in the eye. [Press release from Case Western Reserve University discussing the online prepublication in Biomaterials] CURRENT PUBLICATIONS Tbx3 Improves the Germ-Line Competency of Induced Pluripotent Stem Cells This study underscores the intrinsic qualitative differences between induced pluripotent stem (iPS) cells generated by different methods, and highlights the need to rigorously characterize iPS cells beyond in vitro studies. [Nature] Transforming Growth Factor-Beta-Forkhead O Transcription factors Signalling Maintains Leukaemia-Initiating Cells in Chronic Myeloid Leukaemia Results demonstrate a critical role for the transforming growth factor-beta-forkhead O transcription factors pathway in the maintenance of leukaemia-initiating cells (LIC), and strengthen our understanding of the mechanisms that specifically maintain chronic myeloid leukaemia LICs in vivo. [Nature] Chromatin-Bound Nuclear Pore Components Regulate Gene Expression in Higher Eukaryotes Nucleoporins Sec13, Nup98, and Nup88, as well as a group of FG-repeat nucleoporins, bind to the Drosophila genome at functionally distinct loci that often do not represent nuclear envelope contact sites. [Cell] Regulation of Alternative Splicing by Histone Modifications Results outline an adaptor system for reading of histone marks by the pre-mRNA splicing machinery. [Science] A Nonviral Minicircle Vector for Deriving Human Induced Pluripotent Stem Cells Researchers use a single minicircle vector to generate transgene-free induced pluripotent stem cells from adult human adipose stem cells. [Nat Methods] Human and Mouse Adipose-Derived Cells Support Feeder-Independent Induction of Pluripotent Stem Cells Adult human and mouse adipose-derived stem cells can be reprogrammed to induced pluripotent stem cells with substantially higher efficiencies than those reported for human and mouse fibroblasts. [Proc Natl Acad Sci U S A] Regenerative Medicine Special Feature: Supramolecular Design of Self-Assembling Nanofibers for Cartilage Regeneration Results demonstrate the potential of a completely synthetic bioactive biomaterial as a therapy to promote cartilage regeneration. [Proc Natl Acad Sci U S A] Differentiation and Characterization of Metabolically Functioning Hepatocytes from Human Embryonic Stem Cells Researchers generated a relatively homogenous population of hepatocytes from human embryonic stem cells, which appear to have complete metabolic function that is comparable to primary liver cells. [Stem Cells] Vorinostat Interferes with the Signaling Transduction Pathway of T Cell Receptor and Synergizes with PI3K Inhibitors in Cutaneous T-Cell Lymphoma Results demonstrate the potential targets of suberoylanilide hydroxamic acid, underlining the importance of T cell receptor signaling inhibition following vorinostat treatment. [Haematologica] Persistent Donor Cell Gene Expression Among Human Induced Pluripotent Stem Cells Contributes to Differences with Human Embryonic Stem Cells Researchers compare the gene profiles of human induced pluripotent stem cells derived from fetal fibroblasts, neonatal fibroblasts, adipose stem cells, and keratinocytes to their corresponding donor cells and human embryonic stem cells. [PLoS ONE]
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