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Friday, June 27, 2008

New Source Of Stem Cells Found For Heart !!! | Shoppillrx.com

Renew Your Heart With The Latest Heart Stem Cells

Researchers in the U.S have discovered a new group of stem cells that can give rise to heart muscle cells, known as cardiomyocytes.

The stem cells are located in the outermost layer of the heart and could one day play a critical role in regenerating injured heart tissue, the researchers say. For the first time new heart stem cells can also be derived from a third type of cardiac stell cell, located within the surface of the organ and identifiable through its expression of a gene called Wt1.

"In heart failure, you lose cardiomyocytes, so the only way to reverse heart failure is to make more of these cells," said by, the study's lead researcher and a pediatric cardiologist at Children's Hospital in Boston, Massachusetts.

The new findings come on the heels of two earlier breakthroughs. In 2006 scientists identified another cardiac stem cell marked by the expression of a gene called Nkx2-5 -- with the potential to become either heart muscle or cells lining blood vessels in the organ's left-sided chambers.
Gene expression is the process by which information encoded in the DNA of a particular gene is transformed into a protein or RNA, which plays a key role in protein synthesis.

In parallel, other US researchers discovered a related progenitor heart cell so-called because of its capacity to generate different types of tissue that produces the same cell types in the right-sided heart chambers.

The cells from the heart's outer lining, called the epicardium, can not only metamorphose into cardiomyocytes but also into smooth muscle cells, endothelial cells, which line the interior of blood vessels, and fibroblasts, found in connective tissue.

"If you are going to regenerate tissue, you need to regenerate the whole tissue, not just the cardiomyocytes," said by the researchers in a statement. The discovery of the new stem cells was an accident. In order to study the role a different gene in the epicardium, the researchers labeled cells in live mouse embryos with red fluorescent protein. "Unexpectedly, we saw that these epicardial cells were becoming cardiomycytes -- it was a lucky observation," said by the researchers.

The next big challenge, the researchers added, is trying to figure out how a progenitor stem cell decides to become a certain type of functioning cell within the heart, and then how to develop methods to trick the stem cells into transforming into the desired tissue. For more information about Lipitor, Buy Zocor, Buy Norvasc, Buy Nexium, Buy Prilosec, Buy Prevacid, Buy Protonix, Buy Generic Viagra, Buy Caverta, Buy Kamagra, Buy Kamagra Oral Jelly, Buy Zenegra, Buy Tadalis SX, Buy Cialis, Buy Levitra, Buy Paxil, Buy Slimona, Buy Acomplia, Buy alli, please visit at http://www.shoppillrx.com/

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