| First Author | Grienberger C | Year | 2012 |
| Journal | Nat Commun | Volume | 3 |
| Pages | 774 | PubMed ID | 22491322 |
| Mgi Jnum | J:268636 | Mgi Id | MGI:6212665 |
| Doi | 10.1038/ncomms1783 | Citation | Grienberger C, et al. (2012) Staged decline of neuronal function in vivo in an animal model of Alzheimer's disease. Nat Commun 3:774 |
| abstractText | The accumulation of amyloid-beta in the brain is an essential feature of Alzheimer's disease. However, the impact of amyloid-beta-accumulation on neuronal dysfunction on the single cell level in vivo is poorly understood. Here we investigate the progression of amyloid-beta load in relation to neuronal dysfunction in the visual system of the APP23xPS45 mouse model of Alzheimer's disease. Using in vivo two-photon calcium imaging in the visual cortex, we demonstrate that a progressive deterioration of neuronal tuning for the orientation of visual stimuli occurs in parallel with the age-dependent increase of the amyloid-beta load. Importantly, we find this deterioration only in neurons that are hyperactive during spontaneous activity. This impairment of visual cortical circuit function also correlates with pronounced deficits in visual-pattern discrimination. Together, our results identify distinct stages of decline in sensory cortical performance in vivo as a function of the increased amyloid-beta-load. |
