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Zhang X, Wang J, Liu Y, Wang H, Li B, Li Q, Wang Y, Zong Y, Wang J, Meng Q, Wu S, Hao R, Li X, Chen R, Chen H. In situ profiling reveals spatially metabolic injury in the initiation of polystyrene nanoplastic-derived intestinal epithelial injury in mice. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172037. [PMID: 38575003 DOI: 10.1016/j.scitotenv.2024.172037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/06/2024]
Abstract
Despite increasing concerns regarding the harmful effects of plastic-induced gut injury, mechanisms underlying the initiation of plastic-derived intestinal toxicity remain unelucidated. Here, mice were subjected to long-term exposure to polystyrene nanoplastics (PS-NPs) of varying sizes (80, 200, and 1000 nm) at doses relevant to human dietary exposure. PS-NPs exposure did not induce a significant inflammatory response, histopathological damage, or intestinal epithelial dysfunction in mice at a dosage of 0.5 mg/kg/day for 28 days. However, PS-NPs were detected in the mouse intestine, coupled with observed microstructural changes in enterocytes, including mild villous lodging, mitochondrial membrane rupture, and endoplasmic reticulum (ER) dysfunction, suggesting that intestinal-accumulating PS-NPs resulted in the onset of intestinal epithelial injury in mice. Mechanistically, intragastric PS-NPs induced gut microbiota dysbiosis and specific bacteria alterations, accompanied by abnormal metabolic fingerprinting in the plasma. Furthermore, integrated data from mass spectrometry imaging-based spatial metabolomics and metallomics revealed that PS-NPs exposure led to gut dysbiosis-associated host metabolic reprogramming and initiated intestinal injury. These findings provide novel insights into the critical gut microbial-host metabolic remodeling events vital to nanoplastic-derived-initiated intestinal injury.
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Affiliation(s)
- Xianan Zhang
- School of Public Health, Capital Medical University, Beijing 100069, China; Yanjing Medical College, Capital Medical University, Beijing 101300, China
| | - Jing Wang
- School of Public Health, Capital Medical University, Beijing 100069, China
| | - Yuansheng Liu
- School of Public Health, Capital Medical University, Beijing 100069, China
| | - Hemin Wang
- School of Public Health, Capital Medical University, Beijing 100069, China
| | - Bin Li
- School of Public Health, Capital Medical University, Beijing 100069, China
| | - Qing Li
- School of Public Health, Capital Medical University, Beijing 100069, China
| | - Yi Wang
- School of Public Health, Capital Medical University, Beijing 100069, China
| | - Yuru Zong
- School of Public Health, Capital Medical University, Beijing 100069, China
| | - Jiajia Wang
- School of Public Health, Capital Medical University, Beijing 100069, China
| | - Qingtao Meng
- School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Laboratory of Allergic Diseases, Beijing Municipal Education Commission, Beijing 100069, China
| | - Shenshen Wu
- School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Laboratory of Allergic Diseases, Beijing Municipal Education Commission, Beijing 100069, China
| | - Rongzhang Hao
- School of Public Health, Capital Medical University, Beijing 100069, China
| | - Xiaobo Li
- School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Laboratory of Allergic Diseases, Beijing Municipal Education Commission, Beijing 100069, China.
| | - Rui Chen
- School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Laboratory of Allergic Diseases, Beijing Municipal Education Commission, Beijing 100069, China; Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing 100069, China; Department of Occupational and Environmental Health, Fourth Military Medical University, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, Xi'an 710032, China.
| | - Hanqing Chen
- School of Public Health, Capital Medical University, Beijing 100069, China; Department of Nutrition & Food Hygiene, Capital Medical University, Beijing 100069, China.
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Bernardes GPMDA, Serra GM, Silva LDSE, Martins MP, Perez LN, de Molfetta FA, Santos AV, Schneider MPC. Potential Involvement of the South American Lungfish Intelectin-2 in Innate-Associated Immune Modulation. Int J Mol Sci 2024; 25:4798. [PMID: 38732017 PMCID: PMC11084424 DOI: 10.3390/ijms25094798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 04/16/2024] [Accepted: 04/17/2024] [Indexed: 05/13/2024] Open
Abstract
Intelectins belong to a family of lectins with specific and transitory carbohydrate interaction capabilities. These interactions are related to the activity of agglutinating pathogens, as intelectins play a significant role in immunity. Despite the prominent immune defense function of intelectins, limited information about its structural characteristics and carbohydrate interaction properties is available. This study investigated an intelectin transcript identified in RNA-seq data obtained from the South American lungfish (Lepidosiren paradoxa), namely LpITLN2-B. The structural analyses predicted LpITLN2-B to be a homo-trimeric globular protein with the fibrinogen-like functional domain (FReD), exhibiting a molecular mass of 57 kDa. The quaternary structure is subdivided into three monomers, A, B, and C, and each domain comprises 11 β-sheets: an anti-parallel β-sheet, a β-hairpin, and a disordered β-sheet structure. Molecular docking demonstrates a significant interaction with disaccharides rather than monosaccharides. The preferential interaction with disaccharides highlights the potential interaction with pathogen molecules, such as LPS and Poly(I:C). The hemagglutination assay inhibited lectins activity, especially maltose and sucrose, highlighting lectin activity in L. paradoxa samples. Overall, our results show the potential relevance of LpITLN2-B in L. paradoxa immune defense against pathogens.
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Affiliation(s)
| | - Gustavo Marques Serra
- Laboratory of Biotechnology of Enzymes and Biotransformation, Biological Sciences Institute, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil;
| | - Lucas da Silva e Silva
- Laboratory of Genomics and Biotechnology, Biological Sciences Institute, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil; (G.P.M.d.A.B.); (L.d.S.e.S.); (M.P.C.S.)
| | - Maíra Pompeu Martins
- Laboratory of Genomics and Biotechnology, Biological Sciences Institute, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil; (G.P.M.d.A.B.); (L.d.S.e.S.); (M.P.C.S.)
| | - Louise Neiva Perez
- Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA;
| | - Fábio Alberto de Molfetta
- Laboratory of Molecular Modeling, Exact and Natural Sciences Institute, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil;
| | - Agenor Valadares Santos
- Laboratory of Biotechnology of Enzymes and Biotransformation, Biological Sciences Institute, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil;
| | - Maria Paula Cruz Schneider
- Laboratory of Genomics and Biotechnology, Biological Sciences Institute, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil; (G.P.M.d.A.B.); (L.d.S.e.S.); (M.P.C.S.)
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3
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Hong JS, Shamim A, Atta H, Nonnecke EB, Merl S, Patwardhan S, Manell E, Gunes E, Jordache P, Chen B, Lu W, Shen B, Dionigi B, Kiran RP, Sykes M, Zorn E, Bevins CL, Weiner J. Application of enzyme-linked immunosorbent assay to detect antimicrobial peptides in human intestinal lumen. J Immunol Methods 2024; 525:113599. [PMID: 38081407 PMCID: PMC10956375 DOI: 10.1016/j.jim.2023.113599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023]
Abstract
Intestinal transplantation is the definitive treatment for intestinal failure. However, tissue rejection and graft-versus-host disease are relatively common complications, necessitating aggressive immunosuppression that can itself pose further complications. Tracking intraluminal markers in ileal effluent from standard ileostomies may present a noninvasive and sensitive way to detect developing pathology within the intestinal graft. This would be an improvement compared to current assessments, which are limited by poor sensitivity and specificity, contributing to under or over-immunosuppression, respectively, and by the need for invasive biopsies. Herein, we report an approach to reproducibly analyze ileal fluid obtained through stoma sampling for antimicrobial peptide/protein concentrations, reasoning that these molecules may provide an assessment of intestinal homeostasis and levels of intestinal inflammation over time. Concentrations of lysozyme (LYZ), myeloperoxidase (MPO), calprotectin (S100A8/A9) and β-defensin 2 (DEFB2) were assessed using adaptations of commercially available enzyme-linked immunosorbent assays (ELISAs). The concentration of α-defensin 5 (DEFA5) was assessed using a newly developed sandwich ELISA. Our data support that with proper preparation of ileal effluent specimens, precise and replicable determination of antimicrobial peptide/protein concentrations can be achieved for each of these target molecules via ELISA. This approach may prove to be reliable as a clinically useful assessment of intestinal homeostasis over time for patients with ileostomies.
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Affiliation(s)
- Julie S Hong
- Columbia Center of Translational Immunology, Department of Medicine, Columbia University, New York, NY, United States of America.
| | - Abrar Shamim
- Columbia Center of Translational Immunology, Department of Medicine, Columbia University, New York, NY, United States of America; College of Dental Medicine, Columbia University, New York, NY, United States of America
| | - Hussein Atta
- Columbia Center of Translational Immunology, Department of Medicine, Columbia University, New York, NY, United States of America
| | - Eric B Nonnecke
- Department of Microbiology and Immunology, University of California Davis School of Medicine, Davis, CA, United States of America
| | - Sarah Merl
- Department of Pathology and Cell Biology, Columbia University, New York, NY, United States of America
| | - Satyajit Patwardhan
- Columbia Center of Translational Immunology, Department of Medicine, Columbia University, New York, NY, United States of America
| | - Elin Manell
- Columbia Center of Translational Immunology, Department of Medicine, Columbia University, New York, NY, United States of America; Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Esad Gunes
- Columbia Center of Translational Immunology, Department of Medicine, Columbia University, New York, NY, United States of America
| | - Philip Jordache
- Columbia Center of Translational Immunology, Department of Medicine, Columbia University, New York, NY, United States of America
| | - Bryan Chen
- Columbia Center of Translational Immunology, Department of Medicine, Columbia University, New York, NY, United States of America
| | - Wuyuan Lu
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD, United States of America
| | - Bo Shen
- Department of Surgery, Columbia University/New York-Presbyterian Hospital, New York, NY, United States of America
| | - Beatrice Dionigi
- Department of Surgery, Columbia University/New York-Presbyterian Hospital, New York, NY, United States of America
| | - Ravi P Kiran
- Department of Surgery, Columbia University/New York-Presbyterian Hospital, New York, NY, United States of America
| | - Megan Sykes
- Columbia Center of Translational Immunology, Department of Medicine, Columbia University, New York, NY, United States of America; Department of Surgery, Columbia University/New York-Presbyterian Hospital, New York, NY, United States of America
| | - Emmanuel Zorn
- Columbia Center of Translational Immunology, Department of Medicine, Columbia University, New York, NY, United States of America
| | - Charles L Bevins
- Department of Microbiology and Immunology, University of California Davis School of Medicine, Davis, CA, United States of America
| | - Joshua Weiner
- Columbia Center of Translational Immunology, Department of Medicine, Columbia University, New York, NY, United States of America; Department of Surgery, Columbia University/New York-Presbyterian Hospital, New York, NY, United States of America
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4
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Eng SJ, Nonnecke EB, de Lorimier AJ, Ali MR, Tsolis RM, Bevins CL, Ashwood P. FOXO inhibition rescues α-defensin expression in human intestinal organoids. Proc Natl Acad Sci U S A 2023; 120:e2312453120. [PMID: 37956278 PMCID: PMC10666032 DOI: 10.1073/pnas.2312453120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 10/05/2023] [Indexed: 11/15/2023] Open
Abstract
To mediate critical host-microbe interactions in the human small intestine, Paneth cells constitutively produce abundant levels of α-defensins and other antimicrobials. We report that the expression profile of these antimicrobials is dramatically askew in human small intestinal organoids (enteroids) as compared to that in paired tissue from which they are derived, with a reduction of α-defensins to nearly undetectable levels. Murine enteroids, however, recapitulate the expression profile of Paneth cell α-defensins seen in tissue. WNT/TCF signaling has been found to be instrumental in the regulation of α-defensins, yet in human enteroids exogenous stimulation of WNT signaling appears insufficient to rescue α-defensin expression. By stark contrast, forkhead box O (FOXO) inhibitor AS1842856 induced the expression of α-defensin mRNA in enteroids by >100,000-fold, restoring DEFA5 and DEFA6 to levels comparable to those found in primary human tissue. These results newly identify FOXO signaling as a pathway of biological and potentially therapeutic relevance for the regulation of human Paneth cell α-defensins in health and disease.
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Affiliation(s)
- Serena J. Eng
- Department of Medical Microbiology and Immunology, School of Medicine, University of California Davis, Davis, CA95616
- Medical Investigation of Neurodevelopmental Disorders Institute, University of California Davis, Sacramento, CA95817
| | - Eric B. Nonnecke
- Department of Medical Microbiology and Immunology, School of Medicine, University of California Davis, Davis, CA95616
| | - Arthur J. de Lorimier
- University of California Davis Medical Center, Department of Pediatrics, Sacramento, CA95817
| | - Mohamed R. Ali
- University of California Davis Medical Center, Department of Surgery, Sacramento, CA95817
| | - Renée M. Tsolis
- Department of Medical Microbiology and Immunology, School of Medicine, University of California Davis, Davis, CA95616
| | - Charles L. Bevins
- Department of Medical Microbiology and Immunology, School of Medicine, University of California Davis, Davis, CA95616
| | - Paul Ashwood
- Department of Medical Microbiology and Immunology, School of Medicine, University of California Davis, Davis, CA95616
- Medical Investigation of Neurodevelopmental Disorders Institute, University of California Davis, Sacramento, CA95817
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5
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Aljabbari A, Kihara S, Rades T, Boyd BJ. The biomolecular gastrointestinal corona in oral drug delivery. J Control Release 2023; 363:536-549. [PMID: 37776905 DOI: 10.1016/j.jconrel.2023.09.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/24/2023] [Accepted: 09/27/2023] [Indexed: 10/02/2023]
Abstract
The formation of a biomolecular corona on exogenous particles in plasma is well studied and is known to dictate the biodistribution and cellular interactions of nanomedicine formulations. In contrast, while the oral route is the most favorable administration method for pharmaceuticals, little is known about the formation and composition of the corona formed by biomolecules on particles within the gastrointestinal tract. This work reviews the current literature understanding of (1) the formation of drug particles after oral administration, (2) the formation of a biomolecular corona within the gastrointestinal tract ("the gastrointestinal corona"), and (3) the possible implications of the formation of a gastrointestinal corona on the interactions of drug particles with their biological environment. In doing so, this work aims to establish the significance of the formation of a gastrointestinal corona in oral drug delivery to ultimately arrive at new avenues to control the behavior of orally administered pharmaceuticals.
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Affiliation(s)
- Anas Aljabbari
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen Ø 2100, Denmark
| | - Shinji Kihara
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen Ø 2100, Denmark
| | - Thomas Rades
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen Ø 2100, Denmark
| | - Ben J Boyd
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen Ø 2100, Denmark; Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia.
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6
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Puértolas-Balint F, Schroeder BO. Intestinal α-Defensins Play a Minor Role in Modulating the Small Intestinal Microbiota Composition as Compared to Diet. Microbiol Spectr 2023; 11:e0056723. [PMID: 37039638 PMCID: PMC10269482 DOI: 10.1128/spectrum.00567-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 03/16/2023] [Indexed: 04/12/2023] Open
Abstract
The intestinal microbiota is at the interface between the host and its environment and thus under constant exposure to host-derived and external modulators. While diet is considered to be an important external factor modulating microbiota composition, intestinal defensins, one of the major classes of antimicrobial peptides, have been described as key host effectors that shape the gut microbial community. However, since dietary compounds can affect defensin expression, thereby indirectly modulating the intestinal microbiota, their individual contribution to shaping gut microbiota composition remains to be defined. To disentangle the complex interaction among diet, defensins, and small-intestinal microbiota, we fed wild-type (WT) mice and mice lacking functionally active α-defensins (Mmp7-/- mice) either a control diet or a Western-style diet (WSD) that is rich in saturated fat and simple carbohydrates but low in dietary fiber. 16S rDNA sequencing and robust statistical analyses identified that bacterial composition was strongly affected by diet while defensins had only a minor impact. These findings were independent of sample location, with consistent results between the lumen and mucosa of the jejunum and ileum, in both mouse genotypes. However, distinct microbial taxa were also modulated by α-defensins, which was supported by differential antimicrobial activity of ileal protein extracts. As the combination of WSD and defensin deficiency exacerbated glucose metabolism, we conclude that defensins only have a fine-tuning role in shaping the small-intestinal bacterial composition and might instead be important in protecting the host against the development of diet-induced metabolic dysfunction. IMPORTANCE Alterations in the gut microbial community composition are associated with many diseases, and therefore identifying factors that shape the microbial community under homeostatic and diseased conditions may contribute to the development of strategies to correct a dysbiotic microbiota. Here, we demonstrate that a Western-style diet, as an extrinsic parameter, had a stronger impact on shaping the small intestinal bacterial composition than intestinal defensins, as an intrinsic parameter. While defensins have been previously shown to modulate bacterial composition in young mice, our study supplements these findings by showing that defensins may be less important in adult mice that harbor a mature microbial community. Nevertheless, we observed that defensins did affect the abundance of distinct bacterial taxa in adult mice and protected the host from aggravated diet-induced glucose impairments. Consequently, our study uncovers a new angle on the role of intestinal defensins in the development of metabolic diseases in adult mice.
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Affiliation(s)
- Fabiola Puértolas-Balint
- Department of Molecular Biology, Umeå University, Umeå, Sweden
- The Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University, Umeå, Sweden
- Umeå Center for Microbial Research (UCMR), Umeå University, Umeå, Sweden
| | - Bjoern O. Schroeder
- Department of Molecular Biology, Umeå University, Umeå, Sweden
- The Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University, Umeå, Sweden
- Umeå Center for Microbial Research (UCMR), Umeå University, Umeå, Sweden
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7
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Cui C, Wang X, Li L, Wei H, Peng J. Multifaceted involvements of Paneth cells in various diseases within intestine and systemically. Front Immunol 2023; 14:1115552. [PMID: 36993974 PMCID: PMC10040535 DOI: 10.3389/fimmu.2023.1115552] [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: 12/04/2022] [Accepted: 03/02/2023] [Indexed: 03/14/2023] Open
Abstract
Serving as the guardians of small intestine, Paneth cells (PCs) play an important role in intestinal homeostasis maintenance. Although PCs uniquely exist in intestine under homeostasis, the dysfunction of PCs is involved in various diseases not only in intestine but also in extraintestinal organs, suggesting the systemic importance of PCs. The mechanisms under the participation of PCs in these diseases are multiple as well. The involvements of PCs are mostly characterized by limiting intestinal bacterial translocation in necrotizing enterocolitis, liver disease, acute pancreatitis and graft-vs-host disease. Risk genes in PCs render intestine susceptible to Crohn’s disease. In intestinal infection, different pathogens induce varied responses in PCs, and toll-like receptor ligands on bacterial surface trigger the degranulation of PCs. The increased level of bile acid dramatically impairs PCs in obesity. PCs can inhibit virus entry and promote intestinal regeneration to alleviate COVID-19. On the contrary, abundant IL-17A in PCs aggravates multi-organ injury in ischemia/reperfusion. The pro-angiogenic effect of PCs aggravates the severity of portal hypertension. Therapeutic strategies targeting PCs mainly include PC protection, PC-derived inflammatory cytokine elimination, and substituting AMP treatment. In this review, we discuss the influence and importance of Paneth cells in both intestinal and extraintestinal diseases as reported so far, as well as the potential therapeutic strategies targeting PCs.
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Affiliation(s)
- Chenbin Cui
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Xinru Wang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Lindeng Li
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Hongkui Wei
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jian Peng
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China
- *Correspondence: Jian Peng,
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8
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Matute JD, Duan J, Flak MB, Griebel P, Tascon-Arcila JA, Doms S, Hanley T, Antanaviciute A, Gundrum J, Mark Welch JL, Sit B, Abtahi S, Fuhler GM, Grootjans J, Tran F, Stengel ST, White JR, Krupka N, Haller D, Clare S, Lawley TD, Kaser A, Simmons A, Glickman JN, Bry L, Rosenstiel P, Borisy G, Waldor MK, Baines JF, Turner JR, Blumberg RS. Intelectin-1 binds and alters the localization of the mucus barrier-modifying bacterium Akkermansia muciniphila. J Exp Med 2023; 220:e20211938. [PMID: 36413219 PMCID: PMC9683900 DOI: 10.1084/jem.20211938] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 09/06/2022] [Accepted: 10/13/2022] [Indexed: 01/25/2023] Open
Abstract
Intelectin-1 (ITLN1) is a lectin secreted by intestinal epithelial cells (IECs) and upregulated in human ulcerative colitis (UC). We investigated how ITLN1 production is regulated in IECs and the biological effects of ITLN1 at the host-microbiota interface using mouse models. Our data show that ITLN1 upregulation in IECs from UC patients is a consequence of activating the unfolded protein response. Analysis of microbes coated by ITLN1 in vivo revealed a restricted subset of microorganisms, including the mucolytic bacterium Akkermansia muciniphila. Mice overexpressing intestinal ITLN1 exhibited decreased inner colonic mucus layer thickness and closer apposition of A. muciniphila to the epithelial cell surface, similar to alterations reported in UC. The changes in the inner mucus layer were microbiota and A. muciniphila dependent and associated with enhanced sensitivity to chemically induced and T cell-mediated colitis. We conclude that by determining the localization of a select group of bacteria to the mucus layer, ITLN1 modifies this critical barrier. Together, these findings may explain the impact of ITLN1 dysregulation on UC pathogenesis.
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Affiliation(s)
- Juan D. Matute
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
- Division of Newborn Medicine, Department of Pediatrics, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Jinzhi Duan
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Magdalena B. Flak
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Paul Griebel
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Kiel, Germany
| | - Jose A. Tascon-Arcila
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Shauni Doms
- Guest Group Evolutionary Medicine, Max Planck Institute for Evolutionary Biology, Plön, Germany
- Institute of Experimental Medicine, Kiel University, Kiel, Germany
| | - Thomas Hanley
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Agne Antanaviciute
- Medical Research Council (MRC) Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | | | | | - Brandon Sit
- Division of Infectious Diseases, Brigham and Women’s Hospital, Boston, MA
- Department of Microbiology, Harvard Medical School, Boston, MA
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA
- Howard Hughes Medical Institute, Boston, MA
| | - Shabnam Abtahi
- Laboratory of Mucosal Barrier Pathobiology, Department of Pathology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA
| | - Gwenny M. Fuhler
- Department of Gastroenterology & Hepatology, Erasmus MC, University Medical Center, Rotterdam, Netherlands
| | - Joep Grootjans
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
- Department of Gastroenterology and Hepatology, Amsterdam Gastroenterology Endocrinology and Metabolism & Cancer Center Amsterdam, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Florian Tran
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Kiel, Germany
| | - Stephanie T. Stengel
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Kiel, Germany
| | | | - Niklas Krupka
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Dirk Haller
- Nutrition and Immunology, Technische Universität München, Freising, Germany
| | - Simon Clare
- Wellcome Trust Sanger Institute, Hinxton, UK
| | | | - Arthur Kaser
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, and Division of Gastroenterology and Hepatology, Department of Medicine, University of Cambridge, Cambridge, UK
| | - Alison Simmons
- Medical Research Council (MRC) Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Jonathan N. Glickman
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
| | - Lynn Bry
- Massachusetts Host-Microbiome Center, Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Philip Rosenstiel
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Kiel, Germany
| | | | - Matthew K. Waldor
- Division of Infectious Diseases, Brigham and Women’s Hospital, Boston, MA
- Department of Microbiology, Harvard Medical School, Boston, MA
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA
- Howard Hughes Medical Institute, Boston, MA
| | - John F. Baines
- Guest Group Evolutionary Medicine, Max Planck Institute for Evolutionary Biology, Plön, Germany
- Institute of Experimental Medicine, Kiel University, Kiel, Germany
| | - Jerrold R. Turner
- Laboratory of Mucosal Barrier Pathobiology, Department of Pathology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA
| | - Richard S. Blumberg
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
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Nonnecke EB, Castillo PA, Akahoshi DT, Goley SM, Bevins CL, Lönnerdal B. Characterization of an intelectin-1 ( Itln1) knockout mouse model. Front Immunol 2022; 13:894649. [PMID: 36072603 PMCID: PMC9441953 DOI: 10.3389/fimmu.2022.894649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 07/28/2022] [Indexed: 01/26/2023] Open
Abstract
Intelectins are carbohydrate-binding proteins implicated in innate immunity and highly conserved across chordate evolution, including both ascidians and humans. Human intelectin-1 (ITLN1) is highly abundant within the intestinal mucosa and binds microbial but not host glycans. Genome-wide association studies identified SNPs in ITLN1 that are linked to susceptibility for Crohn's disease. Moreover, ITLN1 has been implicated in the pathophysiology of obesity and associated metabolic disease. To gain insight on biological activities of human ITLN1 in vivo, we developed a C57BL/6 mouse model genetically targeting the gene encoding the functional mouse ortholog. In wild-type C57BL/6 mice, both mRNA and protein analysis showed high expression of Itln1 in the small intestine, but manifold lower levels in colon and other extraintestinal tissues. Whereas intestinal expression of human ITLN1 localizes to goblet cells, our data confirm that mouse Itln1 is expressed in Paneth cells. Compared to wild-type littermate controls, mice homozygous for the Itln1 hypomorphic trapping allele had reduced expression levels of Itln1 expression (~10,000-fold). The knockout mice exhibited increased susceptibility in an acute model of experimentally induced colitis with 2% w/v dextran sulfate sodium (DSS). In a model of chronic colitis using a lower dose of DSS (1.5% w/v), which enabled a detailed view of disease activity across a protracted period, no differences were observed in body weight, fecal texture, hemoccult scores, food/water intake, or colon length at necropsy, but there was a statistically significant genotype over time effect for the combined fecal scores of disease activity. In model of diet-induced obesity, using two western-style diets, which varied in amounts of sugar (as sucrose) and saturated fat (as lard), mice with Itln1 expression ablated showed no increased susceptibility, in terms of weight gain, food intake, plasma markers of obesity compared to wildtype littermates. While the mouse genetic knockout model for Itln1 holds promise for elucidating physiological function(s) for mammalian intelectins, results reported here suggest that Itln1, a Paneth cell product in C57BL/6 mice, likely plays a minor role in the pathophysiology of chemically induced colitis or diet-induced obesity.
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Affiliation(s)
- Eric B. Nonnecke
- Department of Microbiology and Immunology, School of Medicine, University of California, Davis, Davis, CA, United States,*Correspondence: Eric B. Nonnecke, ; Charles L. Bevins,
| | - Patricia A. Castillo
- Department of Microbiology and Immunology, School of Medicine, University of California, Davis, Davis, CA, United States
| | - Douglas T. Akahoshi
- Department of Microbiology and Immunology, School of Medicine, University of California, Davis, Davis, CA, United States
| | - Stephanie M. Goley
- Department of Nutrition, University of California, Davis, Davis, CA, United States
| | - Charles L. Bevins
- Department of Microbiology and Immunology, School of Medicine, University of California, Davis, Davis, CA, United States,*Correspondence: Eric B. Nonnecke, ; Charles L. Bevins,
| | - Bo Lönnerdal
- Department of Nutrition, University of California, Davis, Davis, CA, United States
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