PMID- 36585288 OWN - NLM STAT- MEDLINE DCOM- 20230223 LR - 20230223 IS - 1873-569X (Electronic) IS - 0923-1811 (Linking) VI - 108 IP - 3 DP - 2022 Dec TI - Cathepsin B/NLRP3/GSDMD axis-mediated macrophage pyroptosis induces inflammation and fibrosis in systemic sclerosis. PG - 127-137 LID - S0923-1811(22)00277-8 [pii] LID - 10.1016/j.jdermsci.2022.12.006 [doi] AB - BACKGROUND: Pyroptosis is a newly discovered type of programmed cell death associated with inflammatory and fibrotic diseases. Macrophages play an important role in inducing early immune inflammation in systemic sclerosis (SSc). OBJECTIVE: To investigate the effect of macrophages pyroptosis on fibrosis of SSc. METHODS: Pyroptosis/inflammatory markers in serum and skin of SSc patients were detected. Bleomycin (BLM) was subcutaneously injected to establish SSc mouse model. The levels of pyroptosis markers, dermal thickness and collagen deposition in skin were assessed before and after the administration of pyroptosis inhibitors, including MCC950, Disulfiram and necrosulfonamide (NSA). Human-derived monocyte-macrophage cell line (THP-1) or mouse bone marrow-derived macrophages (BMDMs) were primed with lipopolysaccharide (LPS) and stimulated by silicon dioxide (SiO(2)) to induce cell pyroptosis. Fibroblasts from patients with SSc were co-cultured with pyroptotic THP-1 cells, and the collagen production was assessed. RESULTS: Pyroptotic/inflammatory proteins, including NLRP3, cleaved-Caspase (CASP)1, GSDMD-N terminal and IL-18 were increased in the serum, and ASC aggregation and GSDMD were elevated in macrophages in the skin of SSc patients. SSc mice showed increased pyroptosis markers, dermal thickness and collagen deposition in skins, which were alleviated by MCC950, Disulfiram and NSA. Pyroptosis of THP-1 cells and BMDMs was induced by LPS/SiO(2), and it was reduced by the inhibitors of Cathepsin B, NLRP3, CASP1 and GSDMD. Co-culture with pyroptotic THP-1 cells increased the fibrotic proteins in fibroblasts, which were alleviated by pyroptosis inhibitors. CONCLUSIONS: SSc patients and BLM-induced mouse model presented increased pyroptosis. LPS/SiO(2)-induced macrophage pyroptosis promoted fibrosis of SSc through Cathepsin B/NLRP3/GSDMD pathway. CI - Copyright (c) 2022 Japanese Society for Investigative Dermatology. Published by Elsevier B.V. All rights reserved. FAU - Liu, Chaofan AU - Liu C AD - Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Tang, Jiaxuan AU - Tang J AD - Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Liu, Shiying AU - Liu S AD - Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Shen, Chen AU - Shen C AD - Department of Dermatology, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, China. FAU - Zhou, Xing AU - Zhou X AD - Department of Dermatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China. FAU - Lu, Jinghao AU - Lu J AD - Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China. FAU - Li, Ming AU - Li M AD - Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Zhu, Lubing AU - Zhu L AD - Department of Dermatology, Zhongshan Hospital, Fudan University, Shanghai, China. Electronic address: zhu.lubing@zs-hospital.sh.cn. LA - eng PT - Journal Article DEP - 20221224 PL - Netherlands TA - J Dermatol Sci JT - Journal of dermatological science JID - 9011485 RN - 0 (NLR Family, Pyrin Domain-Containing 3 Protein) RN - EC 3.4.22.1 (Cathepsin B) RN - 0 (Lipopolysaccharides) RN - TR3MLJ1UAI (Disulfiram) RN - 7631-86-9 (Silicon Dioxide) RN - EC 3.4.22.36 (Caspase 1) RN - 0 (Inflammasomes) RN - 0 (GSDMD protein, human) RN - 0 (Nlrp3 protein, mouse) SB - IM MH - Humans MH - Mice MH - Animals MH - *Pyroptosis MH - NLR Family, Pyrin Domain-Containing 3 Protein/metabolism MH - Cathepsin B/metabolism/pharmacology MH - Lipopolysaccharides/pharmacology MH - Disulfiram/metabolism/pharmacology MH - Silicon Dioxide/metabolism/pharmacology MH - Macrophages MH - Inflammation/metabolism MH - Caspase 1/metabolism MH - Disease Models, Animal MH - Fibrosis MH - *Scleroderma, Systemic/metabolism MH - Inflammasomes/metabolism OTO - NOTNLM OT - Collagen OT - Macrophage OT - Pyroptosis OT - Silicon dioxide OT - Systemic sclerosis COIS- Declaration of Competing Interest The authors have no conflict of interest to declare. EDAT- 2022/12/31 06:00 MHDA- 2023/02/25 06:00 CRDT- 2022/12/30 21:53 PHST- 2022/04/10 00:00 [received] PHST- 2022/12/01 00:00 [revised] PHST- 2022/12/20 00:00 [accepted] PHST- 2022/12/31 06:00 [pubmed] PHST- 2023/02/25 06:00 [medline] PHST- 2022/12/30 21:53 [entrez] AID - S0923-1811(22)00277-8 [pii] AID - 10.1016/j.jdermsci.2022.12.006 [doi] PST - ppublish SO - J Dermatol Sci. 2022 Dec;108(3):127-137. doi: 10.1016/j.jdermsci.2022.12.006. Epub 2022 Dec 24.