D-4F decreases brain arteriole inflammation and improves cognitive performance in LDL receptor-null mice on a Western diet.

Academic Article

Abstract

  • LDL receptor-null mice on a Western diet (WD) have inflammation in large arteries and endothelial dysfunction in small arteries, which are improved with the apolipoprotein A-I mimetic D-4F. The role of hyperlipidemia in causing inflammation of very small vessels such as brain arterioles has not previously been studied. A WD caused a marked increase in the percent of brain arterioles with associated macrophages (microglia) (P < 0.01), which was reduced by oral D-4F but not by scrambled D-4F (ScD-4F; P < 0.01). D-4F (but not ScD-4F) reduced the percent of brain arterioles associated with CCL3/macrophage inflammatory protein-1alpha (P < 0.01) and CCL2/monocyte chemoattractant protein-1 (P < 0.001). A WD increased (P < 0.001) brain arteriole wall thickness and smooth muscle alpha-actin, which was reduced by D-4F but not by ScD-4F (P < 0.0001). There was no difference in plasma lipid levels, blood pressure, or arteriole lumen diameter with D-4F treatment. Cognitive performance in the T-maze continuous alternation task and in the Morris Water Maze was impaired by a WD and was significantly improved with D-4F but not ScD-4F (P < 0.05). We conclude that a WD induces brain arteriole inflammation and cognitive impairment that is ameliorated by oral D-4F without altering plasma lipids, blood pressure, or arteriole lumen size.
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    Keywords

  • Actins, Animals, Apolipoprotein A-I, Arterioles, Brain, Chemokine CCL2, Chemokine CCL3, Chemokine CCL4, Cognition, Diet, Female, Gene Expression Regulation, Hyperlipidemias, Inflammation, Macrophage Inflammatory Proteins, Mice, Mice, Inbred C57BL, Mice, Knockout, Nootropic Agents, Receptors, LDL
  • Digital Object Identifier (doi)

    Authorlist

  • Buga GM; Frank JS; Mottino GA; Hendizadeh M; Hakhamian A; Tillisch JH; Reddy ST; Navab M; Anantharamaiah GM; Ignarro LJ
  • Start Page

  • 2148
  • End Page

  • 2160
  • Volume

  • 47
  • Issue

  • 10