期刊
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
卷 334, 期 2, 页码 524-532出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2005.06.119
关键词
elastin peptides; TGF-beta 1; osteogenic phenotype; Cbfa-1; alkaline phosphatase; vascular calcification
资金
- NHLBI NIH HHS [R01 HL61652] Funding Source: Medline
Elastin degradation associated with matrix metalloproteinase activity is a cell-mediated process, observed in almost all types of vascular calcification. In this study, we tested the hypothesis that elastin-derived peptides induce an osteogenic response in vascular smooth muscle cells (SMCs) in vitro. Using RT-PCR and specific protein assays, we demonstrated that rat aortic SMCs incubated with elastin peptides exhibited an increased expression of the 67 kDa elastin laminin receptor (ELR) and matrix metalloproteinase-2 and typical bone proteins, such as core binding factor alpha-1, osteocalcin, and alkaline phosphatase. The osteogenic gene expression in SMCs was further enhanced by the addition of TGF-beta 1 along with the elastin peptides, in the absence of any other mineralizing agent. Conversely, lactose (an ELR antagonist) down-regulated expression of most investigated proteins. In conclusion, elastin-derived peptides and TGF-beta 1 up-regulate the expression of typical bone proteins in cultured rat aortic SMCs, possibly via the ELR signaling. (c) 2005 Elsevier Inc. All rights reserved.
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