Linked Life Data

16187216

Source:http://linkedlifedata.com/resource/pubmed/id/16187216

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pubmed-article:16187216pubmed:abstractTextPrevious data have shown that pluripotent stem cells engrafted into the contused spinal cord differentiate only along an astrocytic lineage. The unknown restrictive cues appear to be quite rigid as even neuronal-restricted precursors fail to differentiate to the mature potential they exhibit in vitro after similar grafting into the contused spinal cord. It has been hypothesized that this potent lineage restriction is, in part, the result of the significant loss of both gray and white matter observed following spinal contusion, which elicits a massive acute inflammatory response and is manifested chronically by dramatic cystic cavitation. To evaluate the gray matter component, we developed a clinically relevant model of focal gray matter ischemic injury using the potent vasoconstrictor endothelin (ET-1) and characterized the differentiation of pluripotent stem cells transplanted into this atraumatic vascular SCI. Results demonstrate that low dose ET-1 microinjection into cervical spinal gray matter results in an inflammatory response that is temporally comparable to that observed following traumatic SCI, as well as chronic gray matter loss, but without significant cystic cavitation or white matter degeneration. However, despite the preservation of host spinal parenchyma, no elaboration of neuronal phenotypes was observed from engrafted stem or precursor cells. These results suggest that a common pathologic component responsible for this lineage restriction exists between contusive SCI and ET-1 mediated focal ischemic SCI.lld:pubmed
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pubmed-article:16187216pubmed:dateRevised2007-11-14lld:pubmed
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pubmed-article:16187216pubmed:articleTitleIntraspinal application of endothelin results in focal ischemic injury of spinal gray matter and restricts the differentiation of engrafted neural stem cells.lld:pubmed
pubmed-article:16187216pubmed:affiliationKentucky Spinal Cord Injury Research Center (KSCIRC), 511 South Floyd Street, MDR 616, Louisville, KY 40292, USA.lld:pubmed
pubmed-article:16187216pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:16187216pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed
pubmed-article:16187216pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
pubmed-article:16187216pubmed:publicationTypeResearch Support, N.I.H., Extramurallld:pubmed
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