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PMID: 9568715 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S.

Oxidized LDL regulates macrophage gene expression through ligand activation of PPARgamma.

Cell ·Vol. 93 ·No. 2 ·1998-04-17 ·Pages 229-40

Nagy L, Tontonoz P, Alvarez JG, Chen H, Evans RM

Abstract

Macrophage uptake of oxidized low-density lipoprotein (oxLDL) is thought to play a central role in foam cell formation and the pathogenesis of atherosclerosis. We demonstrate here that oxLDL activates PPARgamma-dependent transcription through a novel signaling pathway involving scavenger receptor-mediated particle uptake. Moreover, we identify two of the major oxidized lipid components of oxLDL, 9-HODE and 13-HODE, as endogenous activators and ligands of PPARgamma. Our data suggest that the biologic effects of oxLDL are coordinated by two sets of receptors, one on the cell surface, which binds and internalizes the particle, and one in the nucleus, which is transcriptionally activated by its component lipids. These results suggest that PPARgamma may be a key regulator of foam cell gene expression.

MeSH Terms
Animals CD36 Antigens/analysis,genetics Cell Differentiation Cells, Cultured Dimerization Fatty Acids, Unsaturated/pharmacology Humans Ligands Linoleic Acids/metabolism,pharmacology Linoleic Acids, Conjugated Lipopolysaccharide Receptors/analysis Lipoproteins, LDL/metabolism,pharmacology Macrophages/metabolism Membrane Proteins Monocytes/cytology,metabolism Oxidation-Reduction Prostaglandin D2/analogs & derivatives,pharmacology Receptors, Cytoplasmic and Nuclear/chemistry,genetics,metabolism Receptors, Immunologic/genetics Receptors, Lipoprotein Receptors, Retinoic Acid/chemistry,metabolism Receptors, Scavenger Recombinant Fusion Proteins Retinoid X Receptors Scavenger Receptors, Class B Signal Transduction/physiology Transcription Factors/chemistry,genetics,metabolism Transcriptional Activation/physiology
Chemicals
15-deoxy-delta(12,14)-prostaglandin J2 CD36 Antigens Fatty Acids, Unsaturated Ligands Linoleic Acids Linoleic Acids, Conjugated Lipopolysaccharide Receptors Lipoproteins, LDL Membrane Proteins Receptors, Cytoplasmic and Nuclear Receptors, Immunologic Receptors, Lipoprotein Receptors, Retinoic Acid Receptors, Scavenger Recombinant Fusion Proteins Retinoid X Receptors Scarb1 protein, mouse Scavenger Receptors, Class B Transcription Factors oxidized low density lipoprotein 9-hydroxy-10,12-octadecadienoic acid 13-hydroxy-9,11-octadecadienoic acid Prostaglandin D2
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Nagy L
The Salk Institute of Biological Studies, Howard Hughes Medical Institute, La Jolla, California 92037, USA.
Tontonoz P
Alvarez J G
Chen H
Evans R M
Article Info
Journal
Cell
Abbr.
Cell
ISSN
0092-8674
Published
1998-04-17
Pages
229-40
Language
English
Region
United States
NLM ID
0413066
Subset
IM
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