Department of Biotechnology
inStem (Institute for Stem Cell Science and Regenerative Medicine)

Immunolipidomics Reveals a Globoside Network During the Resolution of Pro-Inflammatory Response in Human Macrophages.

Publication Type

Journal Article

Date of Publication

January 1, 2022

Journal

Frontiers in immunology

Volume/Issue

13

ISSN

1664-3224

Toll-like receptor 4 (TLR4)-mediated changes in macrophages reshape intracellular lipid pools to coordinate an effective innate immune response. Although this has been previously well-studied in different model systems, it remains incompletely understood in primary human macrophages. Here we report time-dependent lipidomic and transcriptomic responses to lipopolysaccharide (LPS) in primary human macrophages from healthy donors. We grouped the variation of ~200 individual lipid species measured by LC-MS/MS into eight temporal clusters. Among all other lipids, glycosphingolipids (glycoSP) and cholesteryl esters (CE) showed a sharp increase during the resolution phase (between 8h or 16h post LPS). GlycoSP, belonging to the globoside family (Gb3 and Gb4), showed the greatest inter-individual variability among all lipids quantified. Integrative network analysis between GlycoSP/CE levels and genome-wide transcripts, identified Gb4 d18:1/16:0 and CE 20:4 association with subnetworks enriched for T cell receptor signaling (, , , , ) and DC-SIGN signaling (, ), respectively. Our findings reveal Gb3 and Gb4 globosides as sphingolipids associated with the resolution phase of inflammatory response in human macrophages.

Alternate Journal

Front Immunol

PubMed ID

35844525

PubMed Central ID

PMC9280915

Authors

Sneha Muralidharan
Federico Torta
Michelle K Lin
Antoni Olona
Marta Bagnati
Aida Moreno-Moral
Jeong-Hun Ko
Shanshan Ji
Bo Burla
Markus R Wenk
Hosana G Rodrigues
Enrico Petretto
Jacques Behmoaras

Keywords

Humans
Macrophages
Chromatography, Liquid
Globosides
Lipopolysaccharides
Tandem Mass Spectrometry