Apolipoprotein B-containing lipoproteins in retinal aging and age-related macular degeneration

Christine A. Curcio, Mark Johnson, Jiahn Dar Huang, Martin Rudolf

Research output: Contribution to journalReview articlepeer-review

117 Scopus citations

Abstract

The largest risk factor for age-related macular degeneration (ARMD) is advanced age. With aging, there is a striking accumulation of neutral lipids in Bruch's membrane (BrM) of normal eye that continues through adulthood. This accumulation has the potential to significantly impact the physiology of the retinal pigment epithelium (RPE). It also ultimately leads to the creation of a lipid wall at the same locations where drusen and basal linear deposit, the pathognomonic extracellular, lipid-containing lesions of ARMD, subsequently form. Here, we summarize evidence obtained from light microscopy, ultrastructural studies, lipid histochemistry, assay of isolated lipoproteins, and gene expression analysis. These studies suggest that lipid deposition in BrM is at least partially due to accumulation of esterified cholesterol-rich, apolipoprotein B-containing lipoprotein particles produced by the RPE. Furthermore, we suggest that the formation of ARMD lesions and their aftermath may be a pathological response to the retention of a subendothelial apolipoprotein B lipoprotein, similar to a widely accepted model of atherosclerotic coronary artery disease (Tabas, I., K. J. Williams, and J. Borén. 2007. Subendothelial lipoprotein retention as the initiating process in atherosclerosis: update and therapeutic implications. Circulation. 116:1832-1844). This view provides a conceptual basis for the development of novel treatments that may benefit ARMD patients in the future.

Original languageEnglish (US)
Pages (from-to)451-467
Number of pages17
JournalJournal of lipid research
Volume51
Issue number3
DOIs
StatePublished - Mar 1 2010

Keywords

  • Basal deposits
  • Bruch's membrane
  • Cholesterol
  • Drusen
  • Retinal pigment epithelium
  • Retinyl ester

ASJC Scopus subject areas

  • Biochemistry
  • Endocrinology
  • Cell Biology

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