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Myoblasts Give Rise to a Subpopulation of Muscle Satellite Cells |
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Abstract:
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The discovery of multipotential adult stem cells has given researchers the possibility of using these cells for the treatment of various diseases. One particular adult stem cell that resides in skeletal muscle, the satellite cell, is multipotent and has been shown to alleviate symptoms of muscular dystrophy in mouse models. In this study we have investigated the embryological origin of the satellite cell by use of a permanent labeling strategy based on Cre-LoxP recombination. We have used mice that have had the cre recombinase gene knocked into the MyoD locus, a myogenic regulatory gene that is expressed in myoblasts, to test whether satellite cells are derived from myogenic precursors. We have also used Tie2-Cre and Smooth Muscle Myosin Heavy Chain-Cre mice, which are expressed in endothelial precursors and smooth muscle cells, respectively. These cre expressing mice have been crossed to various cre-dependent reporters, and the recombination status of the satellite cell determined by transmission electron microscopy and bright field imaging of X-gal deposits (lacZ reporter), or by confocal and standard fluorescence microscopy (EGFP/EYFP reporter). We have found that adult quiescent satellite cells have a heterogeneous origin, with a subset deriving from embryonic or fetal myoblasts. We have no evidence supporting an endothelial origin of satellite cells. Implications for possible cell based therapies and satellite cell multipotentiality will be discussed. |
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Association:
Name: Connecticut's Stem Cell Research International Symposium URL: http://stemconn.org
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Citation:
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MLA Citation:
| Mendez, Julio., Kanisicak, Onur., Yamamoto, Masakazu. and Goldhamer, David. "Myoblasts Give Rise to a Subpopulation of Muscle Satellite Cells" Paper presented at the annual meeting of the Connecticut's Stem Cell Research International Symposium, TBA, Hartford Connecticut, Mar 27, 2007 <Not Available>. 2013-05-08 <http://citation.allacademic.com/meta/p185355_index.html> |
APA Citation:
| Mendez, J. , Kanisicak, O. , Yamamoto, M. and Goldhamer, D. J. , 2007-03-27 "Myoblasts Give Rise to a Subpopulation of Muscle Satellite Cells" Paper presented at the annual meeting of the Connecticut's Stem Cell Research International Symposium, TBA, Hartford Connecticut <Not Available>. 2013-05-08 from http://citation.allacademic.com/meta/p185355_index.html |
Publication Type: Poster Abstract: The discovery of multipotential adult stem cells has given researchers the possibility of using these cells for the treatment of various diseases. One particular adult stem cell that resides in skeletal muscle, the satellite cell, is multipotent and has been shown to alleviate symptoms of muscular dystrophy in mouse models. In this study we have investigated the embryological origin of the satellite cell by use of a permanent labeling strategy based on Cre-LoxP recombination. We have used mice that have had the cre recombinase gene knocked into the MyoD locus, a myogenic regulatory gene that is expressed in myoblasts, to test whether satellite cells are derived from myogenic precursors. We have also used Tie2-Cre and Smooth Muscle Myosin Heavy Chain-Cre mice, which are expressed in endothelial precursors and smooth muscle cells, respectively. These cre expressing mice have been crossed to various cre-dependent reporters, and the recombination status of the satellite cell determined by transmission electron microscopy and bright field imaging of X-gal deposits (lacZ reporter), or by confocal and standard fluorescence microscopy (EGFP/EYFP reporter). We have found that adult quiescent satellite cells have a heterogeneous origin, with a subset deriving from embryonic or fetal myoblasts. We have no evidence supporting an endothelial origin of satellite cells. Implications for possible cell based therapies and satellite cell multipotentiality will be discussed. |
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Mouse skeletal muscle stem cells (satellite cells) are derived from MyoD+ progenitors and are committed to myogenesis
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