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Wang Y, Gao Y, Su X, Hao Y, Zhang Y, Yang R. LNCGM1082 in Gut Epithelial Cells Promotes Expulsion of Infected Epithelial Cells and Release of IL-18. Immunohorizons 2024; 8:35-46. [PMID: 38189743 PMCID: PMC10835649 DOI: 10.4049/immunohorizons.2300110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 12/11/2023] [Indexed: 01/09/2024] Open
Abstract
Inflammasome NLRC4 (NLR family CARD domain containing 4) can protect mucosal barriers such as intestine from invading bacterial pathogens. However, it was incompletely clear how NLRC4 was activated in intestinal epithelial cells. In this study, we demonstrated that LNCGM1082 could mediate the activation of NLRC4 via binding NLRC4 with protein kinase C (PKC)δ. LNCGM1082 knockout (KO) mice had reduced resistance against Salmonella Typhimurium infection, as well as impaired expulsion of infected gut epithelial cells and release of IL-18 upon exposure to S. Typhimurium. Similar to NLRC4 KO and PKCδ knockdown gut organoids, there also was impaired expulsion of gut epithelial cells and release of IL-18 in LNCGM1082 KO gut organoids. Furthermore, there also was reduced activation of caspase-1 and caspase-8 in these LNCGM1082 KO, NLRC4 KO, and PKCδ knockdown gut organoids upon exposure to S. Typhimurium. Our results show that LNCGM1082 in the ICEs plays a critical role in mediating activation of NLRC4 through binding NLRC4 and PKCδ and promoting expulsion of infected epithelial cells and release of IL-18 upon exposure to bacteria such as S. Typhimurium.
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Affiliation(s)
- Ya Wang
- Translational Medicine Institute, Tianjin Union Medical Center of Nankai University, Tianjin, China; Department of Immunology, Nankai University School of Medicine, Nankai University, Tianjin, China; and State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China
| | - Yunhuan Gao
- Translational Medicine Institute, Tianjin Union Medical Center of Nankai University, Tianjin, China; Department of Immunology, Nankai University School of Medicine, Nankai University, Tianjin, China; and State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China
| | - Xiaomin Su
- Translational Medicine Institute, Tianjin Union Medical Center of Nankai University, Tianjin, China; Department of Immunology, Nankai University School of Medicine, Nankai University, Tianjin, China; and State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China
| | - Yang Hao
- Translational Medicine Institute, Tianjin Union Medical Center of Nankai University, Tianjin, China; Department of Immunology, Nankai University School of Medicine, Nankai University, Tianjin, China; and State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China
| | - Yuan Zhang
- Translational Medicine Institute, Tianjin Union Medical Center of Nankai University, Tianjin, China; Department of Immunology, Nankai University School of Medicine, Nankai University, Tianjin, China; and State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China
| | - Rongcun Yang
- Translational Medicine Institute, Tianjin Union Medical Center of Nankai University, Tianjin, China; Department of Immunology, Nankai University School of Medicine, Nankai University, Tianjin, China; and State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China
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Qian N, Distefano R, Ilieva M, Madsen JH, Rennie S, Uchida S. Systematic Analysis of Long Non-Coding RNAs in Inflammasome Activation in Monocytes/Macrophages. Noncoding RNA 2023; 9:50. [PMID: 37736896 PMCID: PMC10514883 DOI: 10.3390/ncrna9050050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 08/21/2023] [Accepted: 08/23/2023] [Indexed: 09/23/2023] Open
Abstract
The NLRP3 inflammasome plays a pivotal role in regulating inflammation and immune responses. Its activation can lead to an inflammatory response and pyroptotic cell death. This is beneficial in the case of infections, but excessive activation can lead to chronic inflammation and tissue damage. Moreover, while most of the mammalian genome is transcribed as RNAs, only a small fraction codes for proteins. Among non-protein-coding RNAs, long non-coding RNAs (lncRNAs) have been shown to play key roles in regulating gene expression and cellular processes. They interact with DNA, RNAs, and proteins, and their dysregulation can provide insights into disease mechanisms, including NLRP3 inflammasome activation. Here, we systematically analyzed previously published RNA sequencing (RNA-seq) data of NLRP3 inflammasome activation in monocytes/macrophages to uncover inflammasome-regulated lncRNA genes. To uncover the functional importance of inflammasome-regulated lncRNA genes, one inflammasome-regulated lncRNA, ENSG00000273124, was knocked down in an in vitro model of macrophage polarization. The results indicate that silencing of ENSG00000273124 resulted in the up-regulation tumor necrosis factor (TNF), suggesting that this lncRNA might be involved in pro-inflammatory response in macrophages. To make our analyzed data more accessible, we developed the web database InflammasomeDB.
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Affiliation(s)
- Na Qian
- Department of Biology, University of Copenhagen, DK-2200 Copenhagen N, Denmark; (N.Q.); (R.D.); (S.R.)
| | - Rebecca Distefano
- Department of Biology, University of Copenhagen, DK-2200 Copenhagen N, Denmark; (N.Q.); (R.D.); (S.R.)
| | - Mirolyuba Ilieva
- Center for RNA Medicine, Department of Clinical Medicine, Aalborg University, DK-2450 Copenhagen SV, Denmark; (M.I.); (J.H.M.)
| | - Jens Hedelund Madsen
- Center for RNA Medicine, Department of Clinical Medicine, Aalborg University, DK-2450 Copenhagen SV, Denmark; (M.I.); (J.H.M.)
| | - Sarah Rennie
- Department of Biology, University of Copenhagen, DK-2200 Copenhagen N, Denmark; (N.Q.); (R.D.); (S.R.)
| | - Shizuka Uchida
- Center for RNA Medicine, Department of Clinical Medicine, Aalborg University, DK-2450 Copenhagen SV, Denmark; (M.I.); (J.H.M.)
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