Increased Extracellular Amyloid Deposition and Neurodegeneration in Human Amyloid Precursor Protein Transgenic Mice Deficient in Receptor-Associated Protein
Year: 2002
Type: article
Abstract: The low-density lipoprotein receptor-related protein (LRP) is an abundant neuronal cell surface receptor that regulates amyloid beta-protein (Abeta) trafficking into the cell. Specifically, LRP binds secreted Abeta complexes and mediates its degradation. Previously, we have shown in vitro that the uptake of Abeta mediated by LRP is protective and that blocking this receptor significantly enhances neurotoxicity. To further characterize the effects of LRP and other lipoprotein receptors on Abeta deposition, an in vivo model of decreased LRP expression, receptor-associated protein (RAP)-deficient (RAP-/-) mice was crossed with human amyloid protein precursor transgenic (hAPP tg) mice, and plaque formation and neurodegeneration were analyzed. We found that, although the age of onset for plaque formation was the same in hAPP tg and hAPP tg/RAP-/- mice, the amount of amyloid deposited doubled in the hAPP tg/RAP-/- background. Moreover, these mice displayed increased neuronal damage and astrogliosis. Together, these results further support the contention that LRP and other lipoprotein receptors might be neuroprotective against Abeta toxicity and that this receptor might play an integral role in Abeta clearance.
Source: Journal of Neuroscience
Institution: University of California San Diego
Language: English
Subfield: Cellular and Molecular Neuroscience
Field: Neuroscience
Domain: Life Sciences
Open Access status: bronze
Awards: a-synuclein clearance strategies for the treatment of Lewy body disease, G2937085932, a-Synuclein vulnerability mechanisms and therapeutics in Alzheimer's Disease, BASIS OF SYNAPTIC PATHOLOGY IN ALZHEIMERS DISEASE, UCSD Alzheimer's Disease Research Center P50, G3457996028, G486772123, G9000035899
OpenAlex ID: W2097116790