| First Author | Dominguez Gonzalez B | Year | 2018 |
| Journal | Hum Mol Genet | Volume | 27 |
| Issue | 12 | Pages | 2154-2170 |
| PubMed ID | 29868845 | Mgi Jnum | J:263180 |
| Mgi Id | MGI:6160546 | Doi | 10.1093/hmg/ddy125 |
| Citation | Dominguez Gonzalez B, et al. (2018) Excess LINC complexes impair brain morphogenesis in a mouse model of recessive TOR1A disease. Hum Mol Genet 27(12):2154-2170 |
| abstractText | Heterozygosity for the TOR1A-Deltagag mutation causes semi-penetrant childhood-onset dystonia (OMIM #128100). More recently, homozygous TOR1A mutations were shown to cause severe neurological dysfunction in infants. However, there is little known about the recessive cases, including whether existing reports define the full spectrum of recessive TOR1A disease. Here we describe abnormal brain morphogenesis in approximately 30% of Tor1a-/- mouse embryos while, in contrast, this is not found in Tor1aDeltagag/Deltagag mice. The abnormal Tor1a-/- brains contain excess neural tissue, as well as proliferative zone cytoarchitectural defects related to radial glial cell polarity and cytoskeletal organization. In cultured cells torsinA effects the linker of nucleoskeleton and cytoskeleton (LINC) complex that couples the nucleus and cytoskeleton. Here we identify that torsinA loss elevates LINC complex levels in the proliferative zone, and that genetic reduction of LINC complexes prevents abnormal brain morphogenesis in Tor1a-/- embryos. These data show that Tor1a affects radial glial cells via a LINC complex mediated mechanism. They also predict human TOR1A disease will include incompletely penetrant defects in embryonic brain morphogenesis in cases where mutations ablate TOR1A function. |
