| First Author | Pelham CJ | Year | 2012 |
| Journal | Cell Metab | Volume | 16 |
| Issue | 4 | Pages | 462-72 |
| PubMed ID | 23040068 | Mgi Jnum | J:190923 |
| Mgi Id | MGI:5450763 | Doi | 10.1016/j.cmet.2012.08.011 |
| Citation | Pelham CJ, et al. (2012) Cullin-3 regulates vascular smooth muscle function and arterial blood pressure via PPARgamma and RhoA/Rho-kinase. Cell Metab 16(4):462-72 |
| abstractText | Dominant-negative (DN) mutations in the nuclear hormone receptor peroxisome proliferator-activated receptor-gamma (PPARgamma) cause hypertension by an unknown mechanism. Hypertension and vascular dysfunction are recapitulated by expression of DN PPARgamma specifically in vascular smooth muscle of transgenic mice. DN PPARgamma increases RhoA and Rho-kinase activity, and inhibition of Rho-kinase restores normal reactivity and reduces arterial pressure. RhoBTB1, a component of the Cullin-3 RING E3 ubiquitin ligase complex, is a PPARgamma target gene. Decreased RhoBTB1, Cullin-3, and neddylated Cullin-3 correlated with increased levels of the Cullin-3 substrate RhoA. Knockdown of Cullin-3 or inhibition of cullin-RING ligase activity in aortic smooth muscle cells increased RhoA. Cullin-RING ligase inhibition enhanced agonist-mediated contraction in aortic rings from normal mice by a Rho-kinase-dependent mechanism, and it increased arterial pressure in vivo. We conclude that Cullin-3 regulates vascular function and arterial pressure, thus providing a mechanistic link between mutations in Cullin-3 and hypertension in humans. |
