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- W2082819729 abstract "Arterial smooth muscle cells (SMCs) are present in the elastic lamina-containing media, suggesting that the elastic laminae may regulate the development of SMCs. Here, we investigated the role of elastic laminae in regulating the formation of SM alpha actin filaments in mouse CD34+ bone marrow cells and the role of a protein tyrosine phosphatase, SH2 domain-containing protein tyrosine phosphatase (SHP)-1, in the mediation of this process. Mouse CD34+ bone marrow cells were isolated by magnetic separation and used for assessing the influence of elastic laminae and collagen matrix on the formation of SM alpha actin filaments. CD34+ cells with transgenic SHP-1 knockout or siRNA-mediated SHP-1 knockdown were used to assess the role of SHP-1 in mediating the formation of SM alpha actin filaments. In cell culture tests, elastic laminae, but not collagen matrix, stimulated the formation of SM alpha actin filaments in CD34+ cells. The phosphatase SHP-1 mediated the stimulatory effect of elastic laminae. The interaction of CD34+ cells with elastic laminae, but not with collagen matrix, induced activation of SHP-1. The suppression of SHP-1 by transgenic SHP-1 knockout or siRNA-mediated SHP-1 knockdown significantly reduced the formation of SM alpha actin filaments in CD34+ cells cultured on elastic laminae. The in vitro observations were confirmed by using an in vivo model of implantation of elastic lamina and collagen matrix scaffolds into the aorta. These observations suggest that elastic laminae stimulate the formation of SM alpha actin filaments in CD34+ bone marrow cells and SHP-1 mediates the stimulatory effect of elastic laminae." @default.
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- W2082819729 date "2008-05-01" @default.
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- W2082819729 title "Formation of smooth muscle α actin filaments in CD34+ bone marrow cells on arterial elastic laminae: Potential role of SH2 domain-containing protein tyrosine phosphatase-1" @default.
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- W2082819729 doi "https://doi.org/10.1016/j.matbio.2008.01.001" @default.
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