Peroxisome proliferator-activated receptor [alpha] controls cellular cholesterol trafficking in macrophages

G Chinetti-Gbaguidi, E Rigamonti, L Helin, Aino-Liisa Mutka, M Lepore, J.C Fruchart, V Clavey, Elina Ikonen, S Lestavel, B Staels

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The mobilization of cholesterol from intracellular pools to the plasma membrane is a determinant that governs its availability for efflux to extracellular acceptors. NPC1 and NPC2 are proteins localized in the late endosome and control cholesterol transport from the lysosome to the plasma membrane. Here, we report that NPC1 and NPC2 gene expression is induced by oxidized LDL ( OxLDL) in human macrophages. Because OxLDLs contain natural activators of peroxisome proliferator-activated receptor alpha (PPAR alpha),a fatty acid-activated nuclear receptor, the regulation of NPC1 and NPC2 by PPAR alpha and the consequences on cholesterol trafficking were further studied. NPC1 and NPC2 expression is induced by synthetic PPAR alpha ligands in human macrophages. Furthermore, PPAR alpha activation leads to an enrichment of cholesterol in the plasma membrane. By contrast, incubation with progesterone, which blocks postlysosomal cholesterol trafficking, as well as NPC1 and NPC2 mRNA depletion using small interfering RNA, abolished ABCA1-dependent cholesterol efflux induced by PPAR alpha activators. These observations identify a novel regulatory role for PPAR alpha in the control of cholesterol availability for efflux that, associated with its ability to inhibit cholesterol esterification and to stimulate ABCA1 and scavenger receptor class B type I expression, may contribute to the stimulation of reverse cholesterol transport.
Original languageEnglish
JournalJournal of Lipid Research
Volume46
Pages (from-to)2717-2725
Number of pages9
ISSN0022-2275
DOIs
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed

Cite this

Chinetti-Gbaguidi, G., Rigamonti, E., Helin, L., Mutka, A-L., Lepore, M., Fruchart, J. C., ... Staels, B. (2005). Peroxisome proliferator-activated receptor [alpha] controls cellular cholesterol trafficking in macrophages. Journal of Lipid Research, 46, 2717-2725. https://doi.org/10.1194/jlr.M500326-JLR200
Chinetti-Gbaguidi, G ; Rigamonti, E ; Helin, L ; Mutka, Aino-Liisa ; Lepore, M ; Fruchart, J.C ; Clavey, V ; Ikonen, Elina ; Lestavel, S ; Staels, B. / Peroxisome proliferator-activated receptor [alpha] controls cellular cholesterol trafficking in macrophages. In: Journal of Lipid Research. 2005 ; Vol. 46. pp. 2717-2725.
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title = "Peroxisome proliferator-activated receptor [alpha] controls cellular cholesterol trafficking in macrophages",
abstract = "The mobilization of cholesterol from intracellular pools to the plasma membrane is a determinant that governs its availability for efflux to extracellular acceptors. NPC1 and NPC2 are proteins localized in the late endosome and control cholesterol transport from the lysosome to the plasma membrane. Here, we report that NPC1 and NPC2 gene expression is induced by oxidized LDL ( OxLDL) in human macrophages. Because OxLDLs contain natural activators of peroxisome proliferator-activated receptor alpha (PPAR alpha),a fatty acid-activated nuclear receptor, the regulation of NPC1 and NPC2 by PPAR alpha and the consequences on cholesterol trafficking were further studied. NPC1 and NPC2 expression is induced by synthetic PPAR alpha ligands in human macrophages. Furthermore, PPAR alpha activation leads to an enrichment of cholesterol in the plasma membrane. By contrast, incubation with progesterone, which blocks postlysosomal cholesterol trafficking, as well as NPC1 and NPC2 mRNA depletion using small interfering RNA, abolished ABCA1-dependent cholesterol efflux induced by PPAR alpha activators. These observations identify a novel regulatory role for PPAR alpha in the control of cholesterol availability for efflux that, associated with its ability to inhibit cholesterol esterification and to stimulate ABCA1 and scavenger receptor class B type I expression, may contribute to the stimulation of reverse cholesterol transport.",
author = "G Chinetti-Gbaguidi and E Rigamonti and L Helin and Aino-Liisa Mutka and M Lepore and J.C Fruchart and V Clavey and Elina Ikonen and S Lestavel and B Staels",
year = "2005",
doi = "10.1194/jlr.M500326-JLR200",
language = "English",
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Chinetti-Gbaguidi, G, Rigamonti, E, Helin, L, Mutka, A-L, Lepore, M, Fruchart, JC, Clavey, V, Ikonen, E, Lestavel, S & Staels, B 2005, 'Peroxisome proliferator-activated receptor [alpha] controls cellular cholesterol trafficking in macrophages', Journal of Lipid Research, vol. 46, pp. 2717-2725. https://doi.org/10.1194/jlr.M500326-JLR200

Peroxisome proliferator-activated receptor [alpha] controls cellular cholesterol trafficking in macrophages. / Chinetti-Gbaguidi, G; Rigamonti, E; Helin, L; Mutka, Aino-Liisa; Lepore, M; Fruchart, J.C; Clavey, V; Ikonen, Elina; Lestavel, S; Staels, B.

In: Journal of Lipid Research, Vol. 46, 2005, p. 2717-2725.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Peroxisome proliferator-activated receptor [alpha] controls cellular cholesterol trafficking in macrophages

AU - Chinetti-Gbaguidi, G

AU - Rigamonti, E

AU - Helin, L

AU - Mutka, Aino-Liisa

AU - Lepore, M

AU - Fruchart, J.C

AU - Clavey, V

AU - Ikonen, Elina

AU - Lestavel, S

AU - Staels, B

PY - 2005

Y1 - 2005

N2 - The mobilization of cholesterol from intracellular pools to the plasma membrane is a determinant that governs its availability for efflux to extracellular acceptors. NPC1 and NPC2 are proteins localized in the late endosome and control cholesterol transport from the lysosome to the plasma membrane. Here, we report that NPC1 and NPC2 gene expression is induced by oxidized LDL ( OxLDL) in human macrophages. Because OxLDLs contain natural activators of peroxisome proliferator-activated receptor alpha (PPAR alpha),a fatty acid-activated nuclear receptor, the regulation of NPC1 and NPC2 by PPAR alpha and the consequences on cholesterol trafficking were further studied. NPC1 and NPC2 expression is induced by synthetic PPAR alpha ligands in human macrophages. Furthermore, PPAR alpha activation leads to an enrichment of cholesterol in the plasma membrane. By contrast, incubation with progesterone, which blocks postlysosomal cholesterol trafficking, as well as NPC1 and NPC2 mRNA depletion using small interfering RNA, abolished ABCA1-dependent cholesterol efflux induced by PPAR alpha activators. These observations identify a novel regulatory role for PPAR alpha in the control of cholesterol availability for efflux that, associated with its ability to inhibit cholesterol esterification and to stimulate ABCA1 and scavenger receptor class B type I expression, may contribute to the stimulation of reverse cholesterol transport.

AB - The mobilization of cholesterol from intracellular pools to the plasma membrane is a determinant that governs its availability for efflux to extracellular acceptors. NPC1 and NPC2 are proteins localized in the late endosome and control cholesterol transport from the lysosome to the plasma membrane. Here, we report that NPC1 and NPC2 gene expression is induced by oxidized LDL ( OxLDL) in human macrophages. Because OxLDLs contain natural activators of peroxisome proliferator-activated receptor alpha (PPAR alpha),a fatty acid-activated nuclear receptor, the regulation of NPC1 and NPC2 by PPAR alpha and the consequences on cholesterol trafficking were further studied. NPC1 and NPC2 expression is induced by synthetic PPAR alpha ligands in human macrophages. Furthermore, PPAR alpha activation leads to an enrichment of cholesterol in the plasma membrane. By contrast, incubation with progesterone, which blocks postlysosomal cholesterol trafficking, as well as NPC1 and NPC2 mRNA depletion using small interfering RNA, abolished ABCA1-dependent cholesterol efflux induced by PPAR alpha activators. These observations identify a novel regulatory role for PPAR alpha in the control of cholesterol availability for efflux that, associated with its ability to inhibit cholesterol esterification and to stimulate ABCA1 and scavenger receptor class B type I expression, may contribute to the stimulation of reverse cholesterol transport.

U2 - 10.1194/jlr.M500326-JLR200

DO - 10.1194/jlr.M500326-JLR200

M3 - Article

VL - 46

SP - 2717

EP - 2725

JO - Journal of Lipid Research

JF - Journal of Lipid Research

SN - 0022-2275

ER -