Zinc finger motif-1 antagonizes PDGF-BB-induced growth and dedifferentiation of vascular smooth muscle cells
Zinc finger motif-1 (ZFM1) represses proinflammatory gene expression in vascular smooth muscle cells (SMCs) at a global level and thus may also be involved in the attenuation of growth factor-induced phenotype changes in these cells. Using human primary cultured thymus vein SMCs, we have investigate...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
20 Aug 2012
|
| In: |
The FASEB journal
Year: 2012, Volume: 26, Issue: 12, Pages: 4864-4875 |
| ISSN: | 1530-6860 |
| DOI: | 10.1096/fj.12-210302 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1096/fj.12-210302 Verlag, Volltext: https://www.fasebj.org/doi/10.1096/fj.12-210302 
|
| Author Notes: | Marco Cattaruzza, Nicole Nogoy, Agnieszka Wojtowicz, Markus Hecker |
| Summary: | Zinc finger motif-1 (ZFM1) represses proinflammatory gene expression in vascular smooth muscle cells (SMCs) at a global level and thus may also be involved in the attenuation of growth factor-induced phenotype changes in these cells. Using human primary cultured thymus vein SMCs, we have investigated the molecular mechanism by which a potent SMC mitogen, platelet-derived growth factor-BB (PDGF-BB), causes a rapid decrease in ZFM1 expression in a concentration-dependent manner and consequences thereof. Reporter gene analyses and chromatin immunoprecipitation showed that PDGF-BB-induced ZFM1 repression occurs at the level of transcription through replacement of the activating transcription factor Sp1 by Egr-1. The subsequent drop in ZFM1 abundance disinhibits SMC proliferation, migration, and synthetic gene expression in a concerted manner. Stabilizing ZFM1 levels in a PDGF-BB-independent way with a GFP-ZFM1 expression construct or by using Egr-1-specific decoy oligonucleotides abrogates all PDGF-BB effects. Conversely, siRNA-mediated knockdown of ZFM1 alone not only increases the sensitivity of SMCs for PDGF-BB, but even mimics PDGF-BB-induced proliferation and gene expression. Our findings suggest that ZFM1 is an important factor for the stabilization of a contractile SMC phenotype under basal or mildly activating conditions and that, as a prerequisite for efficient action, PDGF-BB must repress ZFM1 expression to alter the SMC phenotype.—Cattaruzza, M., Nogoy, N., Wojtowicz, A., Hecker, M. Zinc finger motif-1 antagonizes PDGF-BB-induced growth and dedifferentiation of vascular smooth muscle cells. |
|---|---|
| Item Description: | Gesehen am 03.05.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1530-6860 |
| DOI: | 10.1096/fj.12-210302 |