Lysophosphatidylserine has bilateral effects on macrophages in the pathogenesis of atherosclerosis

Masako Nishikawa, Makoto Kurano, Hitoshi Ikeda, Junken Aoki, Yutaka Yatomi

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Aim: Lysophospholipids, particularly sphingosine 1-phosphate and lysophosphatidic acid, are known to be involved in the pathogenesis of atherosclerosis; however, the role of lysophosphatidylserine (LysoPS) in the onset of atherosclerotic diseases remains uncertain. Methods: We investigated the effects of LysoPS on the uptake of oxidized low-density lipoprotein (oxLDL) and the modulation of inflammatory mediators and ER stress utilizing RAW264.7 cells and mouse peritoneal macrophages (MPMs). Results: We found that LysoPS augmented cholesterol accumulation in both models. Consistent with these findings, LysoPS increased the expression of scavenger receptors (CD36, MSR1, LOX1 and TLR4). Regarding the involvement of these lipids in inflammation, LysoPS significantly decreased the expression of inflammatory mediators in lipopolysaccharide (LPS)-treated RAW264.7 cells and MPMs. LysoPS also attenuated ER stress in LPS-untreated RAW264.7 cells. The expression patterns of LysoPS receptors differed considerably among the LPS-untreated RAW264.7 cells, LPS-treated RAW264.7 cells and MPMs. Conclusions: LysoPS may have proatherosclerotic properties in the setting of foam cell formation as well as antiatherosclerotic effects on inflammation in macrophages.

Original languageEnglish
Pages (from-to)518-526
Number of pages9
JournalJournal of atherosclerosis and thrombosis
Volume22
Issue number5
DOIs
Publication statusPublished - 2015

Keywords

  • Atherosclerosis
  • Foam cell formation
  • Inflammation
  • Lysophosphatidylserine
  • Macrophage

ASJC Scopus subject areas

  • Internal Medicine
  • Cardiology and Cardiovascular Medicine
  • Biochemistry, medical

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