| First Author | Hayashi T | Year | 2012 |
| Journal | Biochem Biophys Res Commun | Volume | 419 |
| Issue | 3 | Pages | 511-6 |
| PubMed ID | 22366033 | Mgi Jnum | J:182594 |
| Mgi Id | MGI:5316152 | Doi | 10.1016/j.bbrc.2012.02.047 |
| Citation | Hayashi T, et al. (2012) Subcellular localization and putative role of VPS13A/chorein in dopaminergic neuronal cells. Biochem Biophys Res Commun 419(3):511-6 |
| abstractText | Chorea-acanthocytosis (ChAc) is a rare hereditary neurodegenerative disorder caused by loss of function mutations in the vacuolar protein sorting 13 homolog A (VPS13A) gene encoding chorein. Although a deficiency in chorein function leads to apoptosis of striatal neurons in ChAc model mouse, its detailed subcellular localization and physiological role remain unclear. In this study, we produced two anti-chorein polyclonal antibodies and examined the intracellular localization of endogenous chorein in neuronal cells. Immunocytochemically, chorein was observed in the termini of extended neurites and partially colocalized with synaptotagmin I in differentiated PC12 cells. Subcellular localization analysis by sucrose density gradient fractionation showed that chorein and synaptotagmin I were located in dense-core vesicles (DCVs), which contain dopamine. In addition, PC12 cells stably expressing carboxyterminal fragment of chorein increased K(+)-induced dopamine release. Taken together, these results suggest that chorein is involved in exocytosis of DCV. |
