| First Author | Tzeng BH | Year | 2012 |
| Journal | Cardiovasc Res | Volume | 96 |
| Issue | 3 | Pages | 533-42 |
| PubMed ID | 22886848 | Mgi Jnum | J:210079 |
| Mgi Id | MGI:5569473 | Doi | 10.1093/cvr/cvs257 |
| Citation | Tzeng BH, et al. (2012) The Ca(v)3.1 T-type calcium channel is required for neointimal formation in response to vascular injury in mice. Cardiovasc Res 96(3):533-42 |
| abstractText | AIMS: Restenosis is an undesirable consequence following percutaneous vascular interventions. However, the current strategy for preventing restenosis is inadequate. The aim of this study was to investigate the role of low-voltage gated T-type calcium channels in regulating vascular smooth muscle cell (VSMC) proliferation during neointimal formation. METHODS AND RESULTS: Wire injury of mice carotid arteries resulted in neointimal formation in the wild-type and Ca(v)3.2(-/-) but not Ca(v)3.1(-/-) mice, indicating a critical role of Ca(v)3.1 in neointimal formation. In addition, we found a significant increase of Ca(v)3.1 mRNA and protein in injured arteries. Ca(v)3.1 knockout or knockdown (shCa(v)3.1) reduced VSMC proliferation. Since T-channels are expressed predominantly in the G(1) and S phases in VSMCs, we examined whether an abnormal G(1)/S transition was the cause of the reduced cell proliferation in shCa(v)3.1 VSMCs. We found a disrupted expression of cyclin E in shCa(v)3.1 VSMCs, and calmodulin agonist CALP1 partially rescued the defective cell proliferation. Furthermore, we demonstrated that infusion of NNC55-0396, a selective T-channel blocker, inhibited neointimal formation in wild-type mice. CONCLUSION: Ca(v)3.1 is required for VSMC proliferation during neointimal formation, and blocking of Ca(v)3.1 may be beneficial for preventing restenosis. |
