| First Author | Carlo AS | Year | 2013 |
| Journal | J Neurosci | Volume | 33 |
| Issue | 1 | Pages | 358-70 |
| PubMed ID | 23283348 | Mgi Jnum | J:193915 |
| Mgi Id | MGI:5469918 | Doi | 10.1523/JNEUROSCI.2425-12.2013 |
| Citation | Carlo AS, et al. (2013) The pro-neurotrophin receptor sortilin is a major neuronal apolipoprotein E receptor for catabolism of amyloid-beta peptide in the brain. J Neurosci 33(1):358-70 |
| abstractText | Apolipoprotein E (APOE) is the major risk factor for sporadic Alzheimer's disease. Among other functions, APOE is proposed to sequester neurotoxic amyloid-beta (Abeta) peptides in the brain, delivering them to cellular catabolism via neuronal APOE receptors. Still, the receptors involved in this process remain controversial. Here, we identified the pro-neurotrophin receptor sortilin as major endocytic pathway for clearance of APOE/Abeta complexes in neurons. Sortilin binds APOE with high affinity. Lack of receptor expression in mice results in accumulation of APOE and of Abeta in the brain and in aggravated plaque burden. Also, primary neurons lacking sortilin exhibit significantly impaired uptake of APOE/Abeta complexes despite proper expression of other APOE receptors. Despite higher than normal brain APOE levels, sortilin-deficient animals display anomalies in brain lipid metabolism (e.g., accumulation of sulfatides) seen in APOE-deficient mice, indicating functional deficiency in cellular APOE uptake pathways. Together, our findings identified sortilin as an essential neuronal pathway for APOE-containing lipoproteins in vivo and suggest an intriguing link between Abeta catabolism and pro-neurotrophin signaling converging on this receptor. |
