Open AccessTriglyceride breakdown from lipid droplets regulates the inflammatory response in macrophages
Author(s) -
Xanthe A.M.H. van Dierendonck,
Frank Vrieling,
Lisa Smeehuijzen,
Lie Deng,
Joline P. Boogaard,
Cresci-Anne Croes,
Lieve Temmerman,
Suzan Wetzels,
Erik A. L. Biessen,
Sander Kersten,
Rinke Stienstra
Publication year - 2022
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.2114739119
Subject(s) - adipose triglyceride lipase , lipolysis , lipid droplet , proinflammatory cytokine , chemistry , triglyceride , lipopolysaccharide , inflammation , adipose tissue , microbiology and biotechnology , endocrinology , biochemistry , medicine , biology , cholesterol
Significance Lipid droplets (LDs) are ubiquitous organelles that play important roles in cellular energy homeostasis, tightly regulating the accumulation and release of lipids. In macrophages, lipids accumulate in LDs during inflammation. However, it is unclear how inflammatory activation promotes the accumulation of lipids in LDs, and how the dynamic between lipid accumulation and breakdown could drive or inhibit inflammation. Elucidating the role of lipid accumulation during inflammation may provide important knowledge to influence inflammatory processes during health and disease. We identify the importance of the hypoxia-inducible lipid droplet–associated protein and the intracellular adipose triglyceride lipase in the regulation of lipid accumulation and breakdown in inflammatory macrophages. Furthermore, we determine the regulatory effect of lipid breakdown from LDs in supporting inflammation.