PMID- 35978195 OWN - NLM STAT- MEDLINE DCOM- 20220909 LR - 20230525 IS - 1476-4687 (Electronic) IS - 0028-0836 (Print) IS - 0028-0836 (Linking) VI - 609 IP - 7926 DP - 2022 Sep TI - LACC1 bridges NOS2 and polyamine metabolism in inflammatory macrophages. PG - 348-353 LID - 10.1038/s41586-022-05111-3 [doi] AB - The mammalian immune system uses various pattern recognition receptors to recognize invaders and host damage and transmits this information to downstream immunometabolic signalling outcomes. Laccase domain-containing 1 (LACC1) protein is an enzyme highly expressed in inflammatory macrophages and serves a central regulatory role in multiple inflammatory diseases such as inflammatory bowel diseases, arthritis and clearance of microbial infection(1-4). However, the biochemical roles required for LACC1 functions remain largely undefined. Here we elucidated a shared biochemical function of LACC1 in mice and humans, converting L-citrulline to L-ornithine (L-Orn) and isocyanic acid and serving as a bridge between proinflammatory nitric oxide synthase (NOS2) and polyamine immunometabolism. We validated the genetic and mechanistic connections among NOS2, LACC1 and ornithine decarboxylase 1 (ODC1) in mouse models and bone marrow-derived macrophages infected by Salmonella enterica Typhimurium. Strikingly, LACC1 phenotypes required upstream NOS2 and downstream ODC1, and Lacc1(-/-) chemical complementation with its product L-Orn significantly restored wild-type activities. Our findings illuminate a previously unidentified pathway in inflammatory macrophages, explain why its deficiency may contribute to human inflammatory diseases and suggest that L-Orn could serve as a nutraceutical to ameliorate LACC1-associated immunological dysfunctions such as arthritis or inflammatory bowel disease. CI - (c) 2022. The Author(s), under exclusive licence to Springer Nature Limited. FAU - Wei, Zheng AU - Wei Z AUID- ORCID: 0000-0002-1859-0374 AD - Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA. AD - Institute of Biomolecular Design & Discovery, Yale University, West Haven, CT, USA. FAU - Oh, Joonseok AU - Oh J AD - Institute of Biomolecular Design & Discovery, Yale University, West Haven, CT, USA. AD - Department of Chemistry, Yale University, New Haven, CT, USA. FAU - Flavell, Richard A AU - Flavell RA AUID- ORCID: 0000-0003-4461-0778 AD - Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA. richard.flavell@yale.edu. AD - Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT, USA. richard.flavell@yale.edu. FAU - Crawford, Jason M AU - Crawford JM AUID- ORCID: 0000-0002-7583-1242 AD - Institute of Biomolecular Design & Discovery, Yale University, West Haven, CT, USA. jason.crawford@yale.edu. AD - Department of Chemistry, Yale University, New Haven, CT, USA. jason.crawford@yale.edu. AD - Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT, USA. jason.crawford@yale.edu. LA - eng GR - HHMI/Howard Hughes Medical Institute/United States GR - UL1 TR001863/TR/NCATS NIH HHS/United States GR - 1016720/WT_/Wellcome Trust/United Kingdom PT - Journal Article DEP - 20220817 PL - England TA - Nature JT - Nature JID - 0410462 RN - 0 (Cyanates) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (LACC1 protein, human) RN - 0 (Lacc1 protein, mouse) RN - 0 (Polyamines) RN - 29VT07BGDA (Citrulline) RN - E524N2IXA3 (Ornithine) RN - EC 1.14.13.39 (NOS2 protein, human) RN - EC 1.14.13.39 (Nitric Oxide Synthase Type II) RN - EC 1.14.13.39 (Nos2 protein, mouse) RN - EC 4.1.1.17 (Ornithine Decarboxylase) RN - QKG6U31925 (isocyanic acid) SB - IM EIN - Nature. 2023 Jun;618(7965):E21. PMID: 37231312 MH - Animals MH - Arthritis/immunology/metabolism MH - Citrulline/metabolism MH - Cyanates/metabolism MH - Humans MH - *Inflammation/enzymology/immunology/metabolism MH - Inflammatory Bowel Diseases/immunology/metabolism MH - *Intracellular Signaling Peptides and Proteins/metabolism MH - *Macrophages/immunology/metabolism MH - Mice MH - *Nitric Oxide Synthase Type II/metabolism MH - Ornithine/metabolism MH - Ornithine Decarboxylase/metabolism MH - Polyamines/metabolism MH - Salmonella typhimurium/immunology PMC - PMC9813773 MID - NIHMS1831020 EDAT- 2022/08/18 06:00 MHDA- 2022/09/11 06:00 PMCR- 2023/01/05 CRDT- 2022/08/17 23:33 PHST- 2021/07/11 00:00 [received] PHST- 2022/07/14 00:00 [accepted] PHST- 2022/08/18 06:00 [pubmed] PHST- 2022/09/11 06:00 [medline] PHST- 2022/08/17 23:33 [entrez] PHST- 2023/01/05 00:00 [pmc-release] AID - 10.1038/s41586-022-05111-3 [pii] AID - 10.1038/s41586-022-05111-3 [doi] PST - ppublish SO - Nature. 2022 Sep;609(7926):348-353. doi: 10.1038/s41586-022-05111-3. Epub 2022 Aug 17.