LAMTOR/Ragulator regulates lipid metabolism in macrophages and foam cell differentiation
G Lamberti, CH De Smet, M Angelova, L Kremser… - FEBS …, 2020 - Wiley Online Library
FEBS letters, 2020•Wiley Online Library
Late endosomal/lysosomal adaptor and MAPK and mTOR activator (LAMTOR/Ragulator) is
a scaffold protein complex that anchors and regulates multiprotein signaling units on late
endosomes/lysosomes. To identify LAMTOR‐modulated endolysosomal proteins, primary
macrophages were derived from bone marrow of conditional knockout mice carrying a
specific deletion of LAMTOR2 in the monocyte/macrophage cell lineage. Affymetrix‐based
transcriptomic analysis and quantitative iTRAQ‐based organelle proteomic analysis of …
a scaffold protein complex that anchors and regulates multiprotein signaling units on late
endosomes/lysosomes. To identify LAMTOR‐modulated endolysosomal proteins, primary
macrophages were derived from bone marrow of conditional knockout mice carrying a
specific deletion of LAMTOR2 in the monocyte/macrophage cell lineage. Affymetrix‐based
transcriptomic analysis and quantitative iTRAQ‐based organelle proteomic analysis of …
Late endosomal/lysosomal adaptor and MAPK and mTOR activator (LAMTOR/Ragulator) is a scaffold protein complex that anchors and regulates multiprotein signaling units on late endosomes/lysosomes. To identify LAMTOR‐modulated endolysosomal proteins, primary macrophages were derived from bone marrow of conditional knockout mice carrying a specific deletion of LAMTOR2 in the monocyte/macrophage cell lineage. Affymetrix‐based transcriptomic analysis and quantitative iTRAQ‐based organelle proteomic analysis of endosomes derived from macrophages were performed. Further analyses showed that LAMTOR could be a novel regulator of foam cell differentiation. The lipid droplet formation phenotype observed in macrophages was additionally confirmed in MEFs, where lipidomic analysis identified cholesterol esters as specifically downregulated in LAMTOR2 knockout cells. The data obtained indicate a function of LAMTOR2 in lipid metabolism.
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