PMID- 34062371 OWN - NLM STAT- MEDLINE DCOM- 20211231 LR - 20211231 IS - 1878-1705 (Electronic) IS - 1567-5769 (Linking) VI - 97 DP - 2021 Aug TI - A20 functions as a negative regulator in macrophage for DSS-induced colitis. PG - 107804 LID - S1567-5769(21)00440-9 [pii] LID - 10.1016/j.intimp.2021.107804 [doi] AB - The function of A20 as a deubiquitinating enzyme in inflammatory diseases and autoimmune diseases has been reported, we therefore aimed to investigate the potential effects of A20 in macrophages and dextran sodium sulfate (DSS)-induced colitis mouse model. Colitis mouse model was induced by DSS treatment. Tnfaip3(fl/fl) mice were crossed with Lyz2-Cre mice to generate A20 myeloid cell-conditional knockout mice. The expression levels of indicated cytokines were analyzed by quantitative reverse transcriptase real-time polymerase chain reaction and enzyme-linked immunosorbent assay. Phosphorylated and total protein levels in nuclear factor kappa B (NF-kappaB) signaling pathway were detected by Western blot. In the bone marrow of mice, A20 deficiency did not affect macrophage development. In bone marrow-derived macrophages (BMDMs) after lipopolysaccharide (LPS) treatment, A20 deficiency enhanced pro-inflammatory cytokine expression. A20 deficiency in macrophages led to severe symptoms of DSS-induced colitis in mice. A20 deficiency enhanced the NF-kappaB signaling pathway activity in BMDMs. The effects of A20 deficiency in DSS-induced colitis were suppressed by NF-kappaB pathway inhibition. A20/inhibitor of NF-kappaB kinase 2 (IKKbeta)-double knockout mice were resistant to DSS-induced colitis. A20 suppresses pro-inflammatory cytokine expression in macrophages through the NF-kappaB signal pathway and alleviates the pathogenesis of DSS-induced colitis in mice. CI - Copyright (c) 2021 Elsevier B.V. All rights reserved. FAU - Pu, Tian AU - Pu T AD - Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou 450052, Henan, China. FAU - Liu, Wenzheng AU - Liu W AD - Department of Gastroenterology, Peking University Third Hospital, No. 49 Huayuan North Road, Beijing 100191, China. FAU - Wu, Yijun AU - Wu Y AD - Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou 450052, Henan, China. FAU - Zhao, Ye AU - Zhao Y AD - Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou 450052, Henan, China. Electronic address: fcczhaoy@zzu.edu.cn. LA - eng PT - Journal Article DEP - 20210529 PL - Netherlands TA - Int Immunopharmacol JT - International immunopharmacology JID - 100965259 RN - 9042-14-2 (Dextran Sulfate) RN - EC 3.4.19.12 (Tumor Necrosis Factor alpha-Induced Protein 3) RN - EC 3.4.22.- (Tnfaip3 protein, mouse) SB - IM MH - Animals MH - Cells, Cultured MH - Colitis/chemically induced/*immunology/pathology MH - Colon/immunology/pathology MH - Dextran Sulfate/administration & dosage/toxicity MH - Disease Models, Animal MH - Humans MH - Intestinal Mucosa/immunology/pathology MH - Macrophages/*immunology/metabolism MH - Mice MH - Mice, Knockout MH - Primary Cell Culture MH - Tumor Necrosis Factor alpha-Induced Protein 3/genetics/*metabolism OTO - NOTNLM OT - A20 OT - DSS-induced colitis OT - Macrophage OT - NF-kappaB EDAT- 2021/06/02 06:00 MHDA- 2022/01/01 06:00 CRDT- 2021/06/01 20:18 PHST- 2021/02/08 00:00 [received] PHST- 2021/04/13 00:00 [revised] PHST- 2021/05/19 00:00 [accepted] PHST- 2021/06/02 06:00 [pubmed] PHST- 2022/01/01 06:00 [medline] PHST- 2021/06/01 20:18 [entrez] AID - S1567-5769(21)00440-9 [pii] AID - 10.1016/j.intimp.2021.107804 [doi] PST - ppublish SO - Int Immunopharmacol. 2021 Aug;97:107804. doi: 10.1016/j.intimp.2021.107804. Epub 2021 May 29.