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Li W, Nakano H, Fan W, Li Y, Sil P, Nakano K, Zhao F, Karmaus PW, Grimm SA, Shi M, Xu X, Mizuta R, Kitamura D, Wan Y, Fessler MB, Cook DN, Shats I, Li X, Li L. DNASE1L3 enhances antitumor immunity and suppresses tumor progression in colon cancer. JCI Insight 2023; 8:e168161. [PMID: 37581941 PMCID: PMC10544201 DOI: 10.1172/jci.insight.168161] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 08/02/2023] [Indexed: 08/17/2023] Open
Abstract
DNASE1L3, an enzyme highly expressed in DCs, is functionally important for regulating autoimmune responses to self-DNA and chromatin. Deficiency of DNASE1L3 leads to development of autoimmune diseases in both humans and mice. However, despite the well-established causal relationship between DNASE1L3 and immunity, little is known about the involvement of DNASE1L3 in regulation of antitumor immunity, the foundation of modern antitumor immunotherapy. In this study, we identify DNASE1L3 as a potentially new regulator of antitumor immunity and a tumor suppressor in colon cancer. In humans, DNASE1L3 is downregulated in tumor-infiltrating DCs, and this downregulation is associated with poor patient prognosis and reduced tumor immune cell infiltration in many cancer types. In mice, Dnase1l3 deficiency in the tumor microenvironment enhances tumor formation and growth in several colon cancer models. Notably, the increased tumor formation and growth in Dnase1l3-deficient mice are associated with impaired antitumor immunity, as evidenced by a substantial reduction of cytotoxic T cells and a unique subset of DCs. Consistently, Dnase1l3-deficient DCs directly modulate cytotoxic T cells in vitro. To our knowledge, our study unveils a previously unknown link between DNASE1L3 and antitumor immunity and further suggests that restoration of DNASE1L3 activity may represent a potential therapeutic approach for anticancer therapy.
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Affiliation(s)
- Wenling Li
- Biostatistics and Computational Biology Branch
- Signal Transduction Laboratory
| | | | - Wei Fan
- Biostatistics and Computational Biology Branch
- Signal Transduction Laboratory
| | - Yuanyuan Li
- Biostatistics and Computational Biology Branch
| | - Payel Sil
- Biostatistics and Computational Biology Branch
| | | | - Fei Zhao
- Immunity, Inflammation, and Disease Laboratory
| | | | | | - Min Shi
- Biostatistics and Computational Biology Branch
| | - Xin Xu
- Epigenetics and Stem Cell Biology Laboratory, National Institute of Environmental Health Sciences (NIEHS), Research Triangle Park, North Carolina, USA
| | - Ryushin Mizuta
- Division of Cancer Cell Biology, Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba, Japan
| | - Daisuke Kitamura
- Division of Cancer Cell Biology, Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba, Japan
| | - Yisong Wan
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, North Carolina, USA
| | | | | | | | | | - Leping Li
- Biostatistics and Computational Biology Branch
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Madenspacher JH, Morrell ED, McDonald JG, Thompson BM, Li Y, Birukov KG, Birukova AA, Stapleton RD, Alejo A, Karmaus PW, Meacham JM, Rai P, Mikacenic C, Wurfel MM, Fessler MB. 25-Hydroxycholesterol exacerbates vascular leak during acute lung injury. JCI Insight 2023; 8:e155448. [PMID: 36821369 PMCID: PMC10132150 DOI: 10.1172/jci.insight.155448] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 02/21/2023] [Indexed: 02/24/2023] Open
Abstract
Cholesterol-25-hydroxylase (CH25H), the biosynthetic enzyme for 25-hydroxycholesterol (25HC), is most highly expressed in the lung, but its role in lung biology is poorly defined. Recently, we reported that Ch25h is induced in monocyte-derived macrophages recruited to the airspace during resolution of lung inflammation and that 25HC promotes liver X receptor-dependent (LXR-dependent) clearance of apoptotic neutrophils by these cells. Ch25h and 25HC are, however, also robustly induced by lung-resident cells during the early hours of lung inflammation, suggesting additional cellular sources and targets. Here, using Ch25h-/- mice and exogenous 25HC in lung injury models, we provide evidence that 25HC sustains proinflammatory cytokines in the airspace and augments lung injury, at least in part, by inducing LXR-independent endoplasmic reticulum stress and endothelial leak. Suggesting an autocrine effect in endothelium, inhaled LPS upregulates pulmonary endothelial Ch25h, and non-hematopoietic Ch25h deletion is sufficient to confer lung protection. In patients with acute respiratory distress syndrome, airspace 25HC and alveolar macrophage CH25H were associated with markers of microvascular leak, endothelial activation, endoplasmic reticulum stress, inflammation, and clinical severity. Taken together, our findings suggest that 25HC deriving from and acting on different cell types in the lung communicates distinct, temporal LXR-independent and -dependent signals to regulate inflammatory homeostasis.
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Affiliation(s)
- Jennifer H. Madenspacher
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina, USA
| | - Eric D. Morrell
- Section of Pulmonary, Critical Care, and Sleep Medicine, Harborview Medical Center, Seattle, Washington, USA
| | - Jeffrey G. McDonald
- Center for Human Nutrition and
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | | | - Yue Li
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Konstantin G. Birukov
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Anna A. Birukova
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Renee D. Stapleton
- Department of Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont, USA
| | - Aidin Alejo
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina, USA
| | - Peer W. Karmaus
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina, USA
| | - Julie M. Meacham
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina, USA
| | - Prashant Rai
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina, USA
| | - Carmen Mikacenic
- Section of Pulmonary, Critical Care, and Sleep Medicine, Harborview Medical Center, Seattle, Washington, USA
| | - Mark M. Wurfel
- Section of Pulmonary, Critical Care, and Sleep Medicine, Harborview Medical Center, Seattle, Washington, USA
| | - Michael B. Fessler
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina, USA
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