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Material screening method allows more precise control over stem cells
Date:4/11/2013

MADISON When it comes to delivering genes to living human tissue, the odds of success come down the molecule. The entire therapy including the tools used to bring new genetic material into a cell must have predictable effects.

Now, a new screening process will simplify non-viral transfection, providing a method researchers and clinicians use to find an optimal set of biomaterials to deliver genes to cells.

Developed by William Murphy, the Harvey D. Spangler professor of biomedical engineering at the University of Wisconsin-Madison, the method gives researchers greater control over how cells react to the gene delivery mechanism. The broader implication is more nuanced, effective control over cell behavior. "We've been exploring using this concept for reprogramming of adult cells, as well as controlling differentiation of stem cell types," Murphy says.

Murphy and his collaborators published news of their advance in the March 28, 2013 issue of Nature Scientific Reports. http://www.nature.com/srep/2013/130328/srep01567/full/srep01567.html

In a current successful approach, researchers use specialized viruses to deliver genetic material to cells. While efficient, that method also carries a greater risk of turning on unwanted genes or provoking an immune response from the body making it less attractive for sensitive biomedical applications like controlling stem cell behavior, says Murphy.

His team has developed a process that does not rely on viruses. Rather, the researchers can grow specific calcium phosphate coatings that serve as a medium via which genetic material can be delivered to cells more efficiently. By matching a coating to a specific application for delivering genes, Murphy has seen up to a 70-fold increase in successful expression of those genes in human stem cells.

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Contact: William Murphy
wlmurphy@wisc.edu
608-262-2224
University of Wisconsin-Madison
Source:Eurekalert

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