High-Density Lipoproteins Exert Pro-inflammatory Effects on Macrophages via Passive Cholesterol Depletion and PKC-NF-kappa B/STAT1-IRF1 Signaling

Emiel P. C. van der Vorst, Kosta Theodorou, Yongzheng Wu, Marten A. Hoeksema, Pieter Goossens, Christina A. Bursill, Taghi Aliyev, Leonie F. A. Huitema, Sander W. Tas, Ine M J Wolfs, Marijke J. E. Kuijpers, Marion J. Gijbels, Casper G. Schalkwijk, Debby P. Y. Koonen, Shahla Abdollahi-Roodsaz, Kimberly McDaniels, Chih-Chieh Wang, Michael Leitges, Toby Lawrence, Jogchum PlatMiranda Van Eck, Kerry-Anne Rye, Lhousseine Touqui, Menno P. J. de Winther, Erik A. L. Biessen, Marjo M. P. C. Donners*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

39 Citaten (Scopus)


Membrane cholesterol modulates a variety of cell signaling pathways and functions. While cholesterol depletion by high-density lipoproteins (HDLs) has potent anti-inflammatory effects in various cell types, its effects on inflammatory responses in macrophages remain elusive. Here we show overt pro-inflammatory effects of HDL-mediated passive cholesterol depletion and lipid raft disruption in murine and human primary macrophages in vitro. These pro-inflammatory effects were confirmed in vivo in peritoneal macrophages from apoA-I transgenic mice, which have elevated HDL levels. In line with these findings, the innate immune responses required for clearance of P. aeruginosa bacterial infection in lung were compromised in mice with low HDL levels. Expression analysis, ChIP-PCR, and combinatorial pharmacological and genetic intervention studies unveiled that both native and reconstituted HDL enhance Toll-like-receptor-induced signaling by activating a PKC-NF-kappa B/STAT1-IRF1 axis, leading to increased inflammatory cytokine expression. HDL's pro-inflammatory activity supports proper functioning of macrophage immune responses.

Originele taal-2English
Pagina's (van-tot)197-207
Aantal pagina's11
TijdschriftCell metabolism
Nummer van het tijdschrift1
StatusPublished - 10-jan-2017

Citeer dit