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Foelsch K, Pelczar P, Zierz E, Kondratowicz S, Qi M, Müller C, Alawi M, Huebener S, Clauditz T, Gagliani N, Huber S, Huebener P. Intestinal epithelia and myeloid immune cells shape colitis severity and colorectal carcinogenesis via High-mobility group box protein 1. J Crohns Colitis 2024:jjae017. [PMID: 38285546 DOI: 10.1093/ecco-jcc/jjae017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Indexed: 01/31/2024]
Abstract
BACKGROUND HMGB1 is a ubiquitous nucleoprotein with immune-regulatory properties following cellular secretion or release in sterile and infectious inflammation. Stool and serum HMGB1 levels correlate with colitis severity and colorectal cancer (CRC) progression, yet recent reports indicated HMGB1 to mainly operate as an intracellular determinant of enterocyte fate during colitis, and investigations into the roles of HMGB1 in CRC are lacking. Using mice with conditional HMGB1-knockout in enterocytes (Hmgb1ΔIEC) and myeloid cells (Hmgb1ΔLysM), respectively, we explored functions of HMGB1 in pathogenetically diverse contexts of colitis and colitis-associated CRC. RESULTS HMGB1 is overexpressed in human inflammatory bowel disease and gastrointestinal cancers, and HMGB1 protein localizes in enterocytes and stromal cells in colitis and CRC specimens from humans and rodents. As previously described, enterocyte HMGB1 deficiency aggravates severe chemical-induced intestinal injury, but not Citrobacter rodentium or T cell transfer colitis in mice. HMGB1-deficient enterocytes and organoids do not exhibit deviant apoptotic or autophagic activity, altered proliferative or migratory capacity, abnormal intestinal permeability or aberrant DSS-induced organoid inflammation in vitro. Instead, we observed altered in vivo-reprogramming of both intestinal epithelia and infiltrating myeloid cells in Hmgb1ΔIEC early during colitis, suggesting HMGB1-mediated paracrine injury signaling. Hmgb1ΔIEC had higher CRC burden than wildtypes in the Apc+/min model, whereas inflammatory CRC was attenuated in Hmgb1ΔLysM. Cellular and molecular phenotyping of Hmgb1ΔIEC and Hmgb1ΔLysM cancers indicates context-dependent transcriptional modulation of immune signaling and extracellular matrix remodeling via HMGB1. CONCLUSION Enterocytes and myeloid cells context-dependently regulate host responses to severe colitis and maladaptive intestinal wound healing via HMGB1.
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Affiliation(s)
- Katharina Foelsch
- Department of Internal Medicine, I. Medical Clinic and Polyclinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Penelope Pelczar
- Department of Internal Medicine, I. Medical Clinic and Polyclinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Elisabeth Zierz
- Department of Internal Medicine, I. Medical Clinic and Polyclinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stephanie Kondratowicz
- Department of Internal Medicine, I. Medical Clinic and Polyclinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Minyue Qi
- Bioinformatics Core Facility, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Christian Müller
- Bioinformatics Core Facility, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Malik Alawi
- Bioinformatics Core Facility, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Sina Huebener
- Department of Internal Medicine, I. Medical Clinic and Polyclinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Till Clauditz
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nicola Gagliani
- Department of Internal Medicine, I. Medical Clinic and Polyclinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Samuel Huber
- Department of Internal Medicine, I. Medical Clinic and Polyclinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Peter Huebener
- Department of Internal Medicine, I. Medical Clinic and Polyclinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Dörk R, Pelczar P, Shiri AM, Volmari A, Zierz E, Giannou A, Böttcher M, Bosurgi L, Huber S, Manthey CF. Myeloid Cell-Specific Deletion of PDGFR-α Promotes Dysbiotic Intestinal Microbiota and thus Increased Colitis Susceptibility. J Crohns Colitis 2023; 17:1858-1869. [PMID: 37377226 DOI: 10.1093/ecco-jcc/jjad103] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/04/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023]
Abstract
BACKGROUND AND AIMS The incidence of inflammatory bowel diseases [IBD] is steadily increasing, and thus the identification of new targets to improve therapy is a major goal. Growth factors of the PDGF family and their receptors are expressed early in intestinal development and are found in mononuclear cells and macrophages in adult tissues. Macrophages play a distinct role in the pathogenesis of IBD since their function is crucial to maintaining tolerance. METHODS We aimed to study the role of myeloid expression of PDGFR-α in mediating intestinal homeostasis in mouse IBD and infectious models. RESULTS Our results show that loss of myeloid PDGFR-α increases susceptibility to dextran saline sulphate-induced colitis. Accordingly, LysM-PDGFR-α-/- mice showed higher colitis scores, and reduced levels of anti-inflammatory macrophages compared to control mice. This effect was mediated via a pro-colitogenic microbiota, which developed in the absence of myeloid PDGFR-α and caused increased colitis susceptibility in gnotobiotic mice upon faecal microbiota transplantation compared to controls. Furthermore, LysM-PDGFR-α-/- mice had a leaky gut, accompanied by impaired phagocytosis, resulting in a severe barrier defect. CONCLUSIONS Taken together, our results indicate a protective role for myeloid PDGFR-α in maintaining gut homeostasis by promoting a protective intestinal microbiota and providing an anti-inflammatory macrophage phenotype.
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Affiliation(s)
- Ronja Dörk
- I. Department of Medicine, University Medical Center, Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Penelope Pelczar
- I. Department of Medicine, University Medical Center, Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Ahmad M Shiri
- I. Department of Medicine, University Medical Center, Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Annika Volmari
- I. Department of Medicine, University Medical Center, Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Elisabeth Zierz
- I. Department of Medicine, University Medical Center, Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Anastasios Giannou
- I. Department of Medicine, University Medical Center, Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Marius Böttcher
- I. Department of Medicine, University Medical Center, Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Lidia Bosurgi
- I. Department of Medicine, University Medical Center, Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Samuel Huber
- I. Department of Medicine, University Medical Center, Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Carolin F Manthey
- I. Department of Medicine, University Medical Center, Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
- GIM, Pferdebachstr. 29, 58455 Witten, Germany
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Volmari A, Foelsch K, Zierz E, Yan K, Qi M, Bartels K, Kondratowicz S, Boettcher M, Reimers D, Nishibori M, Liu K, Schwabe RF, Lohse AW, Huber S, Mittruecker HW, Huebener P. Leukocyte-Derived High-Mobility Group Box 1 Governs Hepatic Immune Responses to Listeria monocytogenes. Hepatol Commun 2021; 5:2104-2120. [PMID: 34558858 PMCID: PMC8631102 DOI: 10.1002/hep4.1777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 06/07/2021] [Accepted: 06/13/2021] [Indexed: 11/08/2022] Open
Abstract
High-mobility group box 1 (HMGB1) is a nucleoprotein with proinflammatory functions following cellular release during tissue damage. Moreover, antibody-mediated HMGB1 neutralization alleviates lipopolysaccharide (LPS)-induced shock, suggesting a role for HMGB1 as a superordinate therapeutic target for inflammatory and infectious diseases. Recent genetic studies have indicated cell-intrinsic functions of HMGB1 in phagocytes as critical elements of immune responses to infections, yet the role of extracellular HMGB1 signaling in this context remains elusive. We performed antibody-mediated and genetic HMGB1 deletion studies accompanied by in vitro experiments to discern context-dependent cellular sources and functions of extracellular HMGB1 during murine bloodstream infection with Listeria monocytogenes. Antibody-mediated neutralization of extracellular HMGB1 favors bacterial dissemination and hepatic inflammation in mice. Hepatocyte HMGB1, a key driver of postnecrotic inflammation in the liver, does not affect Listeria-induced inflammation or mortality. While we confirm that leukocyte HMGB1 deficiency effectuates disseminated listeriosis, we observed no evidence of dysfunctional autophagy, xenophagy, intracellular bacterial degradation, or inflammatory gene induction in primary HMGB1-deficient phagocytes or altered immune responses to LPS administration. Instead, we demonstrate that mice devoid of leukocyte HMGB1 exhibit impaired hepatic recruitment of inflammatory monocytes early during listeriosis, resulting in alterations of the transcriptional hepatic immune response and insufficient control of bacterial dissemination. Bone marrow chimera indicate that HMGB1 from both liver-resident and circulating immune cells contributes to effective pathogen control. Conclusion: Leukocyte-derived extracellular HMGB1 is a critical cofactor in the immunologic control of bloodstream listeriosis. HMGB1 neutralization strategies preclude an efficient host immune response against Listeria.
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Affiliation(s)
- Annika Volmari
- First Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Katharina Foelsch
- First Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Elisabeth Zierz
- First Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Karsten Yan
- Institute for Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Minyue Qi
- Bioinformatics Core Facility, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Karlotta Bartels
- First Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stephanie Kondratowicz
- First Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Marius Boettcher
- First Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Daniel Reimers
- Institute for Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Masahiro Nishibori
- Department of Pharmacology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Keyue Liu
- Department of Pharmacology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | | | - Ansgar W Lohse
- First Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Samuel Huber
- First Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Peter Huebener
- First Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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