| First Author | Lin W | Year | 2014 |
| Journal | J Neurosci | Volume | 34 |
| Issue | 8 | Pages | 3079-89 |
| PubMed ID | 24553947 | Mgi Jnum | J:207460 |
| Mgi Id | MGI:5558956 | Doi | 10.1523/JNEUROSCI.2286-13.2014 |
| Citation | Lin W, et al. (2014) Loss of PINK1 attenuates HIF-1alpha induction by preventing 4E-BP1-dependent switch in protein translation under hypoxia. J Neurosci 34(8):3079-89 |
| abstractText | Parkinson's disease (PD) has multiple proposed etiologies with implication of abnormalities in cellular homeostasis ranging from proteostasis to mitochondrial dynamics to energy metabolism. PINK1 mutations are associated with familial PD and here we discover a novel PINK1 mechanism in cellular stress response. Using hypoxia as a physiological trigger of oxidative stress and disruption in energy metabolism, we demonstrate that PINK1(-/-) mouse cells exhibited significantly reduced induction of HIF-1alpha protein, HIF-1alpha transcriptional activity, and hypoxia-responsive gene upregulation. Loss of PINK1 impairs both hypoxia-induced 4E-BP1 dephosphorylation and increase in the ratio of internal ribosomal entry site (IRES)-dependent to cap-dependent translation. These data suggest that PINK1 mediates adaptive responses by activating IRES-dependent translation, and the impairments in translation and the HIF-1alpha pathway may contribute to PINK1-associated PD pathogenesis that manifests under cellular stress. |
