Human resident liver myeloid cells protect against metabolic stress in obesity.

Barreby E, Strunz B, Nock S, Naudet L, Shen JX, Johansson H, Sönnerborg I, Ma J, Urgard E, Pallett LJ, Hu Y, Fardellas A, Azzimato V, Vankova A, Levi L, Morgantini C, Maini MK, Stål P, Rosshart SP, Coquet JM, Nowak G, Näslund E, Lauschke VM, Ellis E, Björkström NK, Chen P, Aouadi M

Nat Metab 5 (7) 1188-1203 [2023-07-00; online 2023-07-06]

Although multiple populations of macrophages have been described in the human liver, their function and turnover in patients with obesity at high risk of developing non-alcoholic fatty liver disease (NAFLD) and cirrhosis are currently unknown. Herein, we identify a specific human population of resident liver myeloid cells that protects against the metabolic impairment associated with obesity. By studying the turnover of liver myeloid cells in individuals undergoing liver transplantation, we find that liver myeloid cell turnover differs between humans and mice. Using single-cell techniques and flow cytometry, we determine that the proportion of the protective resident liver myeloid cells, denoted liver myeloid cells 2 (LM2), decreases during obesity. Functional validation approaches using human 2D and 3D cultures reveal that the presence of LM2 ameliorates the oxidative stress associated with obese conditions. Our study indicates that resident myeloid cells could be a therapeutic target to decrease the oxidative stress associated with NAFLD.

Spatial Proteomics [Service]

PubMed 37414931

DOI 10.1038/s42255-023-00834-7

Crossref 10.1038/s42255-023-00834-7

pmc: PMC10365994
pii: 10.1038/s42255-023-00834-7

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