Tag Archives: United States

HOLLAND – Stem cells to create intestinal epithelium

Image by RiffRaff via Flickr

Artificial intestines could be created thanks to stem cells. Intestinal stem cells grown in the laboratory have been manipulated to differentiate in order to produce all of the different types of cells that form intestinal epithelium, said a Dutch study, published in ‘Nature’ magazine by Hans Clevers of the Hubrecht Institute in Utrecht.
The study also outlines a more precise link between stem cells and their microenvironment.

It also offers a practical technique to generate new intestinal epithelium in the laboratory. Stem cells, which express the Lgr5 protein, were discovered on several specific regions of
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SOUTH KOREA – South Korea also relaunches embryonic stem cell research

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After the decision of the United States to remove the ban preventing stem cell researchers from using public funding for experiments, legislators in South Korea have been put under pressure by scientists who have been aspiring to do experiments on stem cells from cloned human embryos.

Up until a few weeks ago the National Bioethics Committee continued to postpone a decision on the matter, but now thanks to the American president, it is increasingly probable that at most, by the end of April, researchers of the Cha Medical Institute of Seoul will be able to resume
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Dentistry Of Future? Gene Responsible For Formation Of Enamel Discovered

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A team of researchers lead by Dr Thimios Mitsiadis at the University of Zurich, Switzerland, has identified a gene responsible for the formation of enamel, which is the key component of the teeth. The experiments were accomplished in mice carrying a deletion of the transcription factor Tbx1, a gene that plays a principal role in several human malformations (heart, thymus, parathyroid, face, and teeth) associated to the DiGeorge syndrome.

“Subjects afflicted by DiGeorge syndrome exhibit teeth with enamel defects. We have demonstrated that a direct link between impaired Tbx1 function and enamel defects exists. Enamel forms via the
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Synthetic Cardiac Stem Cells Offer Less Risks

Stem cell therapy represents a promising strategy in regenerative medicine. However, cells need to be carefully preserved and processed before usage. In addition, cell transplantation carries immunogenicity and/or tumourigenicity risks.

Mounting lines of evidence indicate that stem cells exert their beneficial effects mainly through secretion (of regenerative factors) and membrane-based cell–cell interaction with the injured cells. Here, we fabricate a synthetic cell-mimicking microparticle (CMMP) that recapitulates stem cell functions in tissue repair.

CMMPs carry similar secreted proteins and membranes as genuine cardiac stem cells do. In a mouse model of myocardial infarction, injection of CMMPs leads to the preservation of viable
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