| First Author | Yang SS | Year | 2015 |
| Journal | J Cell Sci | Volume | 128 |
| Issue | 21 | Pages | 3977-89 |
| PubMed ID | 26395397 | Mgi Jnum | J:233780 |
| Mgi Id | MGI:5788053 | Doi | 10.1242/jcs.174870 |
| Citation | Yang SS, et al. (2015) Eukaryotic initiation factor 6 modulates myofibroblast differentiation at transforming growth factor-beta1 transcription level via H2A.Z occupancy and Sp1 recruitment. J Cell Sci 128(21):3977-89 |
| abstractText | Eukaryotic initiation factor 6 (eIF6) is a pivotal regulator of ribosomal function, participating in translational control. Previously our data suggested that eIF6 acts as a key binding protein of P311 (a hypertrophic scar-related protein; also known as NREP). However, a comprehensive investigation of its functional role and the underlying mechanisms in modulation of myofibroblast (a key effector of hypertrophic scar formation) differentiation remains unclear. Here, we identified that eIF6 is a novel regulator of transforming growth factor-beta1 (TGF-beta1) expression at transcription level, which plays a key role in myofibroblast differentiation. Mechanistically, this effect is associated with eIF6 altering the occupancy of the TGF-beta1 promoter by H2A.Z (Swiss-Prot P0C0S6) and Sp1. Accordingly, modulation of eIF6 expression in myofibroblasts signi fi cantly affects their differentiation via the TGF-beta/Smad signaling pathway, which was verified in vivo by the observation that heterozygote eIF6(+/-) mice exhibited enhanced TGF-beta1 production coupled with increased alpha-smooth muscle actin (alpha-SMA)(+) myofibroblasts after skin injury. Overall, our data reveal a novel transcriptional regulatory mechanism of eIF6 that acts on facilitating Sp1 recruitment to TGF-beta1 promoter via H2A.Z depletion and thus results in increased TGF-beta1 transcription, which contributes to myofibroblast differentiation. |
