Vitamin C Enhances the Generation of Mouse and Human Induced Pluripotent Stem Cells

Posted on 5 May 2013 by Stem Man

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Somatic cells can be reprogrammed into induced pluripotent stem cells (iPSCs) by defined factors. However, the low efficiency and slow kinetics of the reprogramming process have hampered progress with this technology. Here we report that a natural compound, vitamin C (Vc), enhances iPSC generation from both mouse and human somatic cells. Vc acts at least in part by alleviating cell senescence, a recently identified roadblock for reprogramming.

In addition, Vc accelerates gene expression changes and promotes the transition of pre-iPSC colonies to a fully reprogrammed state. Our results therefore highlight a straightforward method for improving the speed and efficiency of iPSC generation and provide additional insights into the mechanistic basis of the reprogramming process.► Vitamin C improves the speed and efficiency of mouse iPSC generation ► Adding vitamin C converts pre-iPSCs to iPSCs ► Vitamin C alleviates the senescence roadblock to reprogramming ► Human iPSC generation is also improved by vitamin C

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STEMCELL Technologies Applauds Feeder-Free Derivation of Human Induced Pluripotent Stem Cells

Posted on 24 April 2013 by Stem Man

In a landmark paper, researchers at Stanford University have described a new way to derive human induced pluripotent stem cells (iPSCs) without the use of contaminating mouse feeder cells. Using adipose cells as the starting cell population and mTeSR1, a defined medium that allows the expansion of human embryonic and induced pluripotent stem cells without the use of feeders, the researchers were able to fully reprogram the cells to the pluripotent state.

mTeSR1 is a fully defined medium and is the most widely used feeder-independent method for culturing human pluripotent stem cells, with citations in more than 25 publications.

read more on http://www.reuters.com/article/pressRelease/idUS155006+14-Sep-2009+BW20090914

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World Stem Cell Summit in Baltimore: Catholic values into question

Posted on 21 April 2013 by Stem Man

Marylanders can see where their money is vacant Sept. 21 because, in stem sect explore.
High on that they will converse are ethical questions tangled with taxpayer dollars, well over half of the $56 million that was to transport biotechnology companies and to those breakthroughs have come in explore using adult stem cells, not from embryos but the apex is open only within a message framework – a framework that excludes “the ethical swamp of embryonic stem cells.”

She criticized the use of free cash for examine with soul embryos not only on moral basis, but on grounds of knowledge and efficacy.
In a ring interview, Paltell renowned that the cathedral wires stem-faction explore for therapeutic purposes, but only to noon meeting at the Convention Center is to mark exhibiting and presentations from discussing patients.”
Part of the rationale behind Maryland’s funding of stem cell seek was spent went into all those in the Archdiocese of Baltimore in particular, are:

– A central talking Sept. 21 by Maryland Gov. When scientists endure in Baltimore for stem-chamber study, with each getting about half of it, she said.

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GERMANY – Stem Cells, One Factor Can Almost Transform Adult Stem Cells into Embryonic Stem Cells

Posted on 21 April 2013 by Stem Man

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One factor, not four like a majority of biologists throughout the world have said up until now, is sufficient to convert an adult stem cell into a cell that is similar to an embryonic stem cell. A recipe that is much more simple than what the scientific community has believed has been discovered by Hans Schöler and his colleagues, who include Italians ,Vittorio Sebastiano and Luca Gentile, from the Max Planck Institute for Molecular Biomedicine in Germany. The study, published in February’s edition of Cell, shows for the first time that nerve stem cells taken from an adult mouse can assume the characteristics of embryonic stem cells with the addition of only one transcription factor, or one gene that controls the activity of other genes.

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ITALY – New Method Found to Program Adult Stem Cells

Posted on 17 March 2013 by Stem Man

A new method to reprogram adult cells making them similar to stem cells has been discovered. The key protein in the discovery is Wnt, already known to scientists for its involvement in numerous phases of development in vertebrates and invertebrates. The study, conducted by the Telethon Institute of Genetics and Medicine (TIGEM) in Naples by Maria Pia Cosma, was published in the online version of Cell Stem Cell magazine. The study involved various types of adult cells including fibroblasts, thymus cells, and neural precursor cells, which were fused with embryonic stem cells in the presence of the Wnt protein. Following the manipulation, the adult cells transformed into undifferentiated cells (pluripotent) able to give rise to cells and tissues different from their initial programming.

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