TY - JOUR
T1 - MicroRNA control of podosome formation in vascular smooth muscle cells in vivo and in vitro
AU - Quintavalle, Manuela
AU - Elia, Leonardo
AU - Condorelli, Gianluigi
AU - Courtneidge, Sara A.
PY - 2010/4/5
Y1 - 2010/4/5
N2 - Smooth muscle cell (SMC) plasticity plays an important role during development and in vascular pathologies such as atherosclerosis and restenosis. It was recently shown that down-regulation of microRNA (miR)-143and -145, which are coexpressed from a single promoter, regulates the switch from contractile to synthetic phenotype, allowing SMCs to migrate and proliferate. We show in this study that loss of miR-143/145 in vitro and in vivo results in the formation of podosomes, which are actin-rich membrane protrusions involved in the migration of several cell types, including SMCs. We further show that platelet-derived growth factor (PDGF) mediates podosome formation in SMCs through the regulation of miR-143/145 expression via a pathway involving Src and p53. Moreover, we identify key podosome regulators as targets of miR-143 (PDGF receptor a and protein kinase C. ε) and miR-145 (fascin). Thus, dysregulation of the miR-143 and -145 genes is causally involved in the aberrant SMC plasticity encountered during vascular disease, in part through the up-regulation of an autoregulatory loop that promotes podosome formation.
AB - Smooth muscle cell (SMC) plasticity plays an important role during development and in vascular pathologies such as atherosclerosis and restenosis. It was recently shown that down-regulation of microRNA (miR)-143and -145, which are coexpressed from a single promoter, regulates the switch from contractile to synthetic phenotype, allowing SMCs to migrate and proliferate. We show in this study that loss of miR-143/145 in vitro and in vivo results in the formation of podosomes, which are actin-rich membrane protrusions involved in the migration of several cell types, including SMCs. We further show that platelet-derived growth factor (PDGF) mediates podosome formation in SMCs through the regulation of miR-143/145 expression via a pathway involving Src and p53. Moreover, we identify key podosome regulators as targets of miR-143 (PDGF receptor a and protein kinase C. ε) and miR-145 (fascin). Thus, dysregulation of the miR-143 and -145 genes is causally involved in the aberrant SMC plasticity encountered during vascular disease, in part through the up-regulation of an autoregulatory loop that promotes podosome formation.
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U2 - 10.1083/jcb.200912096
DO - 10.1083/jcb.200912096
M3 - Article
C2 - 20351064
AN - SCOPUS:77950564432
SN - 0021-9525
VL - 189
SP - 13
EP - 22
JO - Journal of Cell Biology
JF - Journal of Cell Biology
IS - 1
ER -