GPx1 deficiency confers increased susceptibility to ferroptosis in macrophages from individuals with active Crohn’s disease
Abstract Intestinal cell death is a defining feature of Crohn’s disease (CD), a major form of inflammatory bowel disease. The focus on this aspect of enteric inflammation has mainly been on epithelial cells, while other cell types such as stromal and myeloid cells have received less attention. Hypot...
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Nature Publishing Group
2024-12-01
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| Series: | Cell Death and Disease |
| Online Access: | https://doi.org/10.1038/s41419-024-07289-y |
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| author | James A. Sousa Blanca E. Callejas Arthur Wang Eve Higgins Aydin Herik Natalie Andonian Munazza Yousuf Pina Colarusso Maitreyi Raman Derek M. McKay |
| author_facet | James A. Sousa Blanca E. Callejas Arthur Wang Eve Higgins Aydin Herik Natalie Andonian Munazza Yousuf Pina Colarusso Maitreyi Raman Derek M. McKay |
| author_sort | James A. Sousa |
| collection | DOAJ |
| description | Abstract Intestinal cell death is a defining feature of Crohn’s disease (CD), a major form of inflammatory bowel disease. The focus on this aspect of enteric inflammation has mainly been on epithelial cells, while other cell types such as stromal and myeloid cells have received less attention. Hypothesising that decreased macrophage viability in an oxidative environment could be a contributing factor to the pathophysiology of CD, we found that monocyte-derived macrophages from individuals with active CD (but not those in clinical disease remission) have increased sensitivity to cell death induced by H2O2. Molecular biology and pharmacological studies ruled out apoptosis and necroptosis, while increased lipid peroxidation and surface expression of the transferrin receptor implicated ferroptosis as the mechanism of the H2O2-induced cell death: this was supported by suppression of H2O2-cytotoxicity by liproxstatin-1, a pharmacological inhibitor of ferroptosis. Selenoproteins are important antioxidants, and selenium deficiency can be a feature of CD. Despite normal dietary intake of selenium, monocyte-derived macrophages and intestinal macrophages in individuals with CD had decreased protein and/or mRNA expression of the selenoprotein, glutathione peroxidase (GPx)-1. Knockdown of GPx1 in macrophages from healthy volunteers resulted in increased H2O2-induced cell death reminiscent of that observed with macrophages from CD. In summary, monocyte-derived macrophages from individuals with CD have increased susceptibility to H2O2-induced ferroptosis cell death, that may be facilitated, at least in part, by reduced expression of the antioxidant GPx1. We suggest that reduced GPx1 in monocytes recruited to the gut and intestinal macrophages renders these cells vulnerable to reactive oxygen species-evoked ferroptosis cell death and that unraveling the participation of this pathway in Crohn’s disease may reveal novel therapeutic approaches to this chronic condition. |
| format | Article |
| id | doaj-art-265aed47e0cd43d2b91951ba526d9946 |
| institution | OA Journals |
| issn | 2041-4889 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Cell Death and Disease |
| spelling | doaj-art-265aed47e0cd43d2b91951ba526d99462025-08-20T01:57:13ZengNature Publishing GroupCell Death and Disease2041-48892024-12-01151211310.1038/s41419-024-07289-yGPx1 deficiency confers increased susceptibility to ferroptosis in macrophages from individuals with active Crohn’s diseaseJames A. Sousa0Blanca E. Callejas1Arthur Wang2Eve Higgins3Aydin Herik4Natalie Andonian5Munazza Yousuf6Pina Colarusso7Maitreyi Raman8Derek M. McKay9Gastrointestinal Research Group, Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of CalgaryGastrointestinal Research Group, Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of CalgaryGastrointestinal Research Group, Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of CalgaryGastrointestinal Research Group, Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of CalgaryGastrointestinal Research Group, Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of CalgaryGastrointestinal Research Group, Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of CalgaryDepartment of Medicine, Cumming School of Medicine, University of CalgaryLive Cell Imaging Laboratory, Department of Physiology and Pharmacology, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of CalgaryDepartment of Medicine, Cumming School of Medicine, University of CalgaryGastrointestinal Research Group, Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of CalgaryAbstract Intestinal cell death is a defining feature of Crohn’s disease (CD), a major form of inflammatory bowel disease. The focus on this aspect of enteric inflammation has mainly been on epithelial cells, while other cell types such as stromal and myeloid cells have received less attention. Hypothesising that decreased macrophage viability in an oxidative environment could be a contributing factor to the pathophysiology of CD, we found that monocyte-derived macrophages from individuals with active CD (but not those in clinical disease remission) have increased sensitivity to cell death induced by H2O2. Molecular biology and pharmacological studies ruled out apoptosis and necroptosis, while increased lipid peroxidation and surface expression of the transferrin receptor implicated ferroptosis as the mechanism of the H2O2-induced cell death: this was supported by suppression of H2O2-cytotoxicity by liproxstatin-1, a pharmacological inhibitor of ferroptosis. Selenoproteins are important antioxidants, and selenium deficiency can be a feature of CD. Despite normal dietary intake of selenium, monocyte-derived macrophages and intestinal macrophages in individuals with CD had decreased protein and/or mRNA expression of the selenoprotein, glutathione peroxidase (GPx)-1. Knockdown of GPx1 in macrophages from healthy volunteers resulted in increased H2O2-induced cell death reminiscent of that observed with macrophages from CD. In summary, monocyte-derived macrophages from individuals with CD have increased susceptibility to H2O2-induced ferroptosis cell death, that may be facilitated, at least in part, by reduced expression of the antioxidant GPx1. We suggest that reduced GPx1 in monocytes recruited to the gut and intestinal macrophages renders these cells vulnerable to reactive oxygen species-evoked ferroptosis cell death and that unraveling the participation of this pathway in Crohn’s disease may reveal novel therapeutic approaches to this chronic condition.https://doi.org/10.1038/s41419-024-07289-y |
| spellingShingle | James A. Sousa Blanca E. Callejas Arthur Wang Eve Higgins Aydin Herik Natalie Andonian Munazza Yousuf Pina Colarusso Maitreyi Raman Derek M. McKay GPx1 deficiency confers increased susceptibility to ferroptosis in macrophages from individuals with active Crohn’s disease Cell Death and Disease |
| title | GPx1 deficiency confers increased susceptibility to ferroptosis in macrophages from individuals with active Crohn’s disease |
| title_full | GPx1 deficiency confers increased susceptibility to ferroptosis in macrophages from individuals with active Crohn’s disease |
| title_fullStr | GPx1 deficiency confers increased susceptibility to ferroptosis in macrophages from individuals with active Crohn’s disease |
| title_full_unstemmed | GPx1 deficiency confers increased susceptibility to ferroptosis in macrophages from individuals with active Crohn’s disease |
| title_short | GPx1 deficiency confers increased susceptibility to ferroptosis in macrophages from individuals with active Crohn’s disease |
| title_sort | gpx1 deficiency confers increased susceptibility to ferroptosis in macrophages from individuals with active crohn s disease |
| url | https://doi.org/10.1038/s41419-024-07289-y |
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