Farhangrazi ZS, Ying H, Bu G, Dugan LL, Fagan AM, Choi DW, Holtzman DM. High density lipoprotein decreases beta-amyloid toxicity in cortical cell culture.
Neuroreport 1997;
8:1127-30. [PMID:
9175098 DOI:
10.1097/00001756-199703240-00013]
[Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A hallmark of Alzheimer's disease (AD) is the extracellular deposition and accumulation of a 39-43 amino peptide, known as the amyloid beta (A beta) protein, within the brain. It has been postulated that A beta may in some way contribute directly to AD pathogenesis. The epsilon 4 allele of apolipoprotein E (apoE) is a major AD risk factor. Since both apoE and A beta are components of lipoproteins in plasma and cerebrospinal fluid, we asked whether lipoproteins and apoE isoforms would modify the toxicity of A beta (1-42) in cortical cell cultures. We show that high density lipoprotein with or without apoE reduces A beta toxicity and that apoE in the absence of lipoproteins does not affect A beta toxicity. These results suggest that interactions between A beta and lipoproteins in the brain could influence AD pathogenesis.
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