Abstract
Matrix metalloproteinases (MMP) play a pivotal role in the pathogenesis of cardiovascular diseases. Their expressions are altered in response to a variety of stimuli, including growth factors, inflammatory markers, and cytokines. In this study, we demonstrated that platelet-derived growth factor-BB (PDGF-BB) induces a dose- and time-dependent increase in MMP-2 expression in rat vascular smooth muscle cells (VSMC). Treatment with either the Rho-associated protein kinase (ROCK) inhibitor Y-27632 or suppression of ROCK-1/2 by small interfering RNA technology significantly reduced the MMP-2 expression, thus suggesting that ROCK regulates such expression. Similar results were observed when VSMC were pretreated with either U0126 or SB203580, which are selective inhibitors of extracellular signal-regulated kinase and p38 mitogen-activated protein kinase, respectively, thus suggesting that these kinases are important for the induction of MMP-2 expression by PDGF-BB. In conclusion, these results described a novel mechanism in atherosclerosis through PDGF-BB signaling in VSMC, in which MMP-2 expression is induced via extracellular signal-regulated kinases and p38 mitogen-activated protein kinase phosphorylation, as well as ROCK.
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Abbreviations
- VSMC:
-
Vascular smooth muscle cells
- PDGF-BB:
-
Platelet-derived growth factor-BB
- ROCK:
-
Rho-associated protein kinase
- MAPK:
-
Mitogen-activated protein kinase
- MMP:
-
Matrix metalloproteinases
- ERK:
-
Extracellular signal-regulated kinase
- SDS:
-
Sodium dodecyl sulfate
- PVDF:
-
Polyvinylidene difluoride
- TBS:
-
Tris-buffered saline
- GAPDH:
-
Glyceraldehyde 3-phosphate dehydrogenase
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Acknowledgments
This work was supported by grants from the National Natural Science Foundation of China (No. 31070719 and No. 31370800).
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We declare that we have no conflict of interest.
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Cui, Y., Sun, YW., Lin, HS. et al. Platelet-derived growth factor-BB induces matrix metalloproteinase-2 expression and rat vascular smooth muscle cell migration via ROCK and ERK/p38 MAPK pathways. Mol Cell Biochem 393, 255–263 (2014). https://doi.org/10.1007/s11010-014-2068-5
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DOI: https://doi.org/10.1007/s11010-014-2068-5