PMID- 30774633 OWN - NLM STAT- MEDLINE DCOM- 20191231 LR - 20200309 IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 10 DP - 2019 TI - Deficiency in IL-33/ST2 Axis Reshapes Mitochondrial Metabolism in Lipopolysaccharide-Stimulated Macrophages. PG - 127 LID - 10.3389/fimmu.2019.00127 [doi] LID - 127 AB - The polarization and function of macrophages play essential roles in controlling immune responses. Interleukin (IL)-33 is a member of the IL-1 family that has been shown to influence macrophage activation and polarization, but the underlying mechanisms are not fully understood. Mitochondrial metabolism has been reported to be a central player in shaping macrophage polarization; previous studies have shown that both aerobic glycolysis and oxidative phosphorylation uniquely regulate the functions of M1 and M2 macrophages. Whether IL-33 polarizes macrophages by reshaping mitochondrial metabolism requires further investigation. In this work, we examined the mitochondrial metabolism of bone marrow-derived macrophages (BMDMs) from either wild type (WT), Il33-overexpressing, or IL-33 receptor knockout (St2(-/-)) mice challenged with lipopolysaccharide (LPS). We found that after LPS stimulation, compared with WT BMDMs, St2(-/-) BMDMs had reduced cytokine production and increased numbers and activity of mitochondria via the metabolism regulator peroxisome proliferator-activated receptor-C coactivator-1 alpha (PGC1alpha). This was demonstrated by increased mitochondrial DNA copy number, mitochondria counts, mitochondria fission- and fusion-related gene expression, oxygen consumption rates, and ATP production, and decreased glucose uptake, lactate production, and extracellular acidification rates. For Il33-overexpressing BMDMs, the metabolic reprogramming upon LPS stimulation was similar to WT BMDMs, and was accompanied by increased M1 macrophage activity. Our findings suggested that the pleiotropic IL-33/ST2 pathway may influence the polarization and function of macrophages by regulating mitochondrial metabolism. FAU - Xu, Huadan AU - Xu H AD - Key Laboratory of Pathobiology, Ministry of Education, Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, China. FAU - Sun, Liankun AU - Sun L AD - Key Laboratory of Pathobiology, Ministry of Education, Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, China. FAU - He, Yichun AU - He Y AD - Department of Neurosurgery, China-Japan Union Hospital, Jilin University, Changchun, China. FAU - Yuan, Xiaofeng AU - Yuan X AD - Department of Pediatrics, Affiliated Hospital of Changchun University of Chinese Medicine, Changchun, China. FAU - Niu, Junqi AU - Niu J AD - Department of Hepatology, The First Hospital of Jilin University, Changchun, China. FAU - Su, Jing AU - Su J AD - Key Laboratory of Pathobiology, Ministry of Education, Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, China. FAU - Li, Dong AU - Li D AD - Department of Hepatology, The First Hospital of Jilin University, Changchun, China. AD - Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190201 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 RN - 0 (DNA, Mitochondrial) RN - 0 (Il1rl1 protein, mouse) RN - 0 (Interleukin-1 Receptor-Like 1 Protein) RN - 0 (Interleukin-33) RN - 0 (Lipopolysaccharides) RN - 0 (Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha) RN - 0 (Ppargc1a protein, mouse) SB - IM MH - Animals MH - Cell Differentiation MH - Cells, Cultured MH - DNA, Mitochondrial/genetics MH - Interleukin-1 Receptor-Like 1 Protein/*genetics/metabolism MH - Interleukin-33/*genetics/metabolism MH - Lipopolysaccharides/immunology MH - Macrophages/*immunology MH - Male MH - Mice MH - Mice, Inbred BALB C MH - Mice, Knockout MH - Mitochondria/*metabolism MH - Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/metabolism MH - Signal Transduction PMC - PMC6367255 OTO - NOTNLM OT - ATP OT - IL-33 OT - PGC1alpha OT - ST2 OT - macrophage EDAT- 2019/02/19 06:00 MHDA- 2020/01/01 06:00 PMCR- 2019/01/01 CRDT- 2019/02/19 06:00 PHST- 2018/05/22 00:00 [received] PHST- 2019/01/15 00:00 [accepted] PHST- 2019/02/19 06:00 [entrez] PHST- 2019/02/19 06:00 [pubmed] PHST- 2020/01/01 06:00 [medline] PHST- 2019/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2019.00127 [doi] PST - epublish SO - Front Immunol. 2019 Feb 1;10:127. doi: 10.3389/fimmu.2019.00127. eCollection 2019.