1
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Choi EK, Rajendiran TM, Soni T, Park JH, Aring L, Muraleedharan CK, Garcia-Hernandez V, Kamada N, Samuelson LC, Nusrat A, Iwase S, Seo YA. The manganese transporter SLC39A8 links alkaline ceramidase 1 to inflammatory bowel disease. Nat Commun 2024; 15:4775. [PMID: 38839750 PMCID: PMC11153611 DOI: 10.1038/s41467-024-49049-8] [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: 02/25/2022] [Accepted: 05/17/2024] [Indexed: 06/07/2024] Open
Abstract
The metal ion transporter SLC39A8 is associated with physiological traits and diseases, including blood manganese (Mn) levels and inflammatory bowel diseases (IBD). The mechanisms by which SLC39A8 controls Mn homeostasis and epithelial integrity remain elusive. Here, we generate Slc39a8 intestinal epithelial cell-specific-knockout (Slc39a8-IEC KO) mice, which display markedly decreased Mn levels in blood and most organs. Radiotracer studies reveal impaired intestinal absorption of dietary Mn in Slc39a8-IEC KO mice. SLC39A8 is localized to the apical membrane and mediates 54Mn uptake in intestinal organoid monolayer cultures. Unbiased transcriptomic analysis identifies alkaline ceramidase 1 (ACER1), a key enzyme in sphingolipid metabolism, as a potential therapeutic target for SLC39A8-associated IBDs. Importantly, treatment with an ACER1 inhibitor attenuates colitis in Slc39a8-IEC KO mice by remedying barrier dysfunction. Our results highlight the essential roles of SLC39A8 in intestinal Mn absorption and epithelial integrity and offer a therapeutic target for IBD associated with impaired Mn homeostasis.
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Affiliation(s)
- Eun-Kyung Choi
- Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - Thekkelnaycke M Rajendiran
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
- Michigan Regional Comprehensive Metabolomics Resource Core, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Tanu Soni
- Michigan Regional Comprehensive Metabolomics Resource Core, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jin-Ho Park
- Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - Luisa Aring
- Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | | | | | - Nobuhiko Kamada
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Linda C Samuelson
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Asma Nusrat
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Shigeki Iwase
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Young Ah Seo
- Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA.
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2
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Moon S, Han S, Jang IH, Ryu J, Rha MS, Cho HJ, Yoon SS, Nam KT, Kim CH, Park MS, Seong JK, Lee WJ, Yoon JH, Chung YW, Ryu JH. Airway epithelial CD47 plays a critical role in inducing influenza virus-mediated bacterial super-infection. Nat Commun 2024; 15:3666. [PMID: 38693120 PMCID: PMC11063069 DOI: 10.1038/s41467-024-47963-5] [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: 02/01/2023] [Accepted: 04/16/2024] [Indexed: 05/03/2024] Open
Abstract
Respiratory viral infection increases host susceptibility to secondary bacterial infections, yet the precise dynamics within airway epithelia remain elusive. Here, we elucidate the pivotal role of CD47 in the airway epithelium during bacterial super-infection. We demonstrated that upon influenza virus infection, CD47 expression was upregulated and localized on the apical surface of ciliated cells within primary human nasal or bronchial epithelial cells. This induced CD47 exposure provided attachment sites for Staphylococcus aureus, thereby compromising the epithelial barrier integrity. Through bacterial adhesion assays and in vitro pull-down assays, we identified fibronectin-binding proteins (FnBP) of S. aureus as a key component that binds to CD47. Furthermore, we found that ciliated cell-specific CD47 deficiency or neutralizing antibody-mediated CD47 inactivation enhanced in vivo survival rates. These findings suggest that interfering with the interaction between airway epithelial CD47 and pathogenic bacterial FnBP holds promise for alleviating the adverse effects of super-infection.
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Affiliation(s)
- Sungmin Moon
- Department of Biomedical Sciences, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Seunghan Han
- Department of Biomedical Sciences, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - In-Hwan Jang
- National Creative Research Initiative Center for Hologenomics and School of Biological Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jaechan Ryu
- Microenvironment and Immunity Unit, Institut Pasteur, INSERM U1224, Paris, France
| | - Min-Seok Rha
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Hyung-Ju Cho
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
- Airway Mucus Institute, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Sang Sun Yoon
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Ki Taek Nam
- Department of Biomedical Sciences, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Chang-Hoon Kim
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
- Airway Mucus Institute, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Man-Seong Park
- Department of Microbiology, Institute for Viral Diseases, Vaccine Innovation Center, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Je Kyung Seong
- Korea Mouse Phenotyping Center, Seoul National University, Seoul, 08826, Republic of Korea
- Laboratory of Developmental Biology and Genomics, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Won-Jae Lee
- National Creative Research Initiative Center for Hologenomics and School of Biological Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Joo-Heon Yoon
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
- Airway Mucus Institute, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Youn Wook Chung
- Department of Biomedical Sciences, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea.
- Airway Mucus Institute, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea.
| | - Ji-Hwan Ryu
- Department of Biomedical Sciences, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea.
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea.
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3
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Park D, Kim SM, Jang H, Kim K, Ji HY, Yang H, Kwon W, Kang Y, Hwang S, Kim H, Casel MAB, Choi I, Yang JS, Lee JY, Choi YK. Differential beta-coronavirus infection dynamics in human bronchial epithelial organoids. J Med Virol 2024; 96:e29600. [PMID: 38591240 DOI: 10.1002/jmv.29600] [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: 12/27/2023] [Revised: 03/27/2024] [Accepted: 03/29/2024] [Indexed: 04/10/2024]
Abstract
The lower respiratory system serves as the target and barrier for beta-coronavirus (beta-CoV) infections. In this study, we explored beta-CoV infection dynamics in human bronchial epithelial (HBE) organoids, focusing on HCoV-OC43, SARS-CoV, MERS-CoV, and SARS-CoV-2. Utilizing advanced organoid culture techniques, we observed robust replication for all beta-CoVs, particularly noting that SARS-CoV-2 reached peak viral RNA levels at 72 h postinfection. Through comprehensive transcriptomic analysis, we identified significant shifts in cell population dynamics, marked by an increase in goblet cells and a concurrent decrease in ciliated cells. Furthermore, our cell tropism analysis unveiled distinct preferences in viral targeting: HCoV-OC43 predominantly infected club cells, while SARS-CoV had a dual tropism for goblet and ciliated cells. In contrast, SARS-CoV-2 primarily infected ciliated cells, and MERS-CoV showed a marked affinity for goblet cells. Host factor analysis revealed the upregulation of genes encoding viral receptors and proteases. Notably, HCoV-OC43 induced the unfolded protein response pathway, which may facilitate viral replication. Our study also reveals a complex interplay between inflammatory pathways and the suppression of interferon responses during beta-CoV infections. These findings provide insights into host-virus interactions and antiviral defense mechanisms, contributing to our understanding of beta-CoV infections in the respiratory tract.
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Affiliation(s)
- Dongbin Park
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
| | - Se-Mi Kim
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
| | - Hobin Jang
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
| | - Kanghee Kim
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
| | - Ho Young Ji
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
| | - Heedong Yang
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
| | - Woohyun Kwon
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
| | - Yeonglim Kang
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
| | - Suhee Hwang
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
| | - Hyunjoon Kim
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
| | - Mark Anthony B Casel
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
| | - Issac Choi
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
| | - Jeong-Sun Yang
- Division of Viral Diseases, Center for Laboratory Control of Infectious Disease, Korea National Institute of Health (KNIH), Cheongju, Republic of Korea
| | - Joo-Yeon Lee
- Division of Viral Diseases, Center for Laboratory Control of Infectious Disease, Korea National Institute of Health (KNIH), Cheongju, Republic of Korea
| | - Young Ki Choi
- Center for Study of Emerging and Re-emerging Viruses, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
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4
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Huang W, Das NK, Radyk MD, Keeley T, Quiros M, Jain C, El-Derany MO, Swaminathan T, Dziechciarz S, Greenson JK, Nusrat A, Samuelson LC, Shah YM. Dietary Iron Is Necessary to Support Proliferative Regeneration after Intestinal Injury. J Nutr 2024; 154:1153-1164. [PMID: 38246358 PMCID: PMC11181351 DOI: 10.1016/j.tjnut.2024.01.013] [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: 10/06/2023] [Revised: 12/04/2023] [Accepted: 01/04/2024] [Indexed: 01/23/2024] Open
Abstract
BACKGROUND Tissue repair and regeneration in the gastrointestinal system are crucial for maintaining homeostasis, with the process relying on intricate cellular interactions and affected by micro- and macro-nutrients. Iron, essential for various biological functions, plays a dual role in tissue healing by potentially causing oxidative damage and participating in anti-inflammatory mechanisms, underscoring its complex relationship with inflammation and tissue repair. OBJECTIVE The study aimed to elucidate the role of low dietary iron in gastrointestinal tissue repair. METHODS We utilized quantitative iron measurements to assess iron levels in inflamed regions of patients with ulcerative colitis and Crohn's disease. In addition, 3 mouse models of gastrointestinal injury/repair (dextran sulfate sodium-induced colitis, radiation injury, and wound biopsy) were used to assess the effects of low dietary iron on tissue repair. RESULTS We found that levels of iron in inflamed regions of both patients with ulcerative colitis and Crohn's disease are elevated. Similarly, during gastrointestinal repair, iron levels were found to be heightened, specifically in intestinal epithelial cells across the 3 injury/repair models. Mice on a low-iron diet showed compromised tissue repair with reduced proliferation. In standard diet, epithelial cells and the stem cell compartment maintain adequate iron stores. However, during a period of iron deficiency, epithelial cells exhaust their iron reserves, whereas the stem cell compartments maintain their iron pools. During injury, when the stem compartment is disrupted, low iron levels impair proliferation and compromise repair mechanisms. CONCLUSIONS Low dietary iron impairs intestinal repair through compromising the ability of epithelial cells to aid in intestinal proliferation.
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Affiliation(s)
- Wesley Huang
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, United States; Department of Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, United States; Medical Scientist Training Program, University of Michigan, Ann Arbor, MI, United States
| | - Nupur K Das
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, United States
| | - Megan D Radyk
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, United States
| | - Theresa Keeley
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, United States
| | - Miguel Quiros
- Department of Pathology, University of Michigan, Ann Arbor, MI, United States
| | - Chesta Jain
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, United States
| | - Marwa O El-Derany
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, United States; Department of Biochemistry, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Thaarini Swaminathan
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, United States
| | - Sofia Dziechciarz
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, United States
| | - Joel K Greenson
- Department of Pathology, University of Michigan, Ann Arbor, MI, United States
| | - Asma Nusrat
- Department of Pathology, University of Michigan, Ann Arbor, MI, United States
| | - Linda C Samuelson
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, United States
| | - Yatrik M Shah
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, United States; Department of Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, United States.
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5
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Wang S, Gong X, Xiao F, Yang Y. Recent advances in host-focused molecular tools for investigating host-gut microbiome interactions. Front Microbiol 2024; 15:1335036. [PMID: 38605718 PMCID: PMC11007152 DOI: 10.3389/fmicb.2024.1335036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 03/18/2024] [Indexed: 04/13/2024] Open
Abstract
Microbial communities in the human gut play a significant role in regulating host gene expression, influencing a variety of biological processes. To understand the molecular mechanisms underlying host-microbe interactions, tools that can dissect signaling networks are required. In this review, we discuss recent advances in molecular tools used to study this interplay, with a focus on those that explore how the microbiome regulates host gene expression. These tools include CRISPR-based whole-body genetic tools for deciphering host-specific genes involved in the interaction process, Cre-loxP based tissue/cell-specific gene editing approaches, and in vitro models of host-derived organoids. Overall, the application of these molecular tools is revolutionizing our understanding of how host-microbiome interactions contribute to health and disease, paving the way for improved therapies and interventions that target microbial influences on the host.
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Affiliation(s)
- Siyao Wang
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Centre for Biomedical Engineering, School of Engineering Medicine, Beihang University, Beijing, China
- Key Laboratory of Big Data-Based Precision Medicine, Ministry of Industry and Information Technology, Beihang University, Beijing, China
| | - Xu Gong
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Centre for Biomedical Engineering, School of Engineering Medicine, Beihang University, Beijing, China
- Key Laboratory of Big Data-Based Precision Medicine, Ministry of Industry and Information Technology, Beihang University, Beijing, China
| | - Fei Xiao
- Department of Thoracic Surgery, China-Japan Friendship Hospital, Beijing, China
| | - Yun Yang
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Centre for Biomedical Engineering, School of Engineering Medicine, Beihang University, Beijing, China
- Key Laboratory of Big Data-Based Precision Medicine, Ministry of Industry and Information Technology, Beihang University, Beijing, China
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6
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Zondervan RL, Capobianco CA, Jenkins DC, Reicha JD, Fredrick LM, Lam C, Isenberg JS, Ahn J, Marcucio RS, Hankenson KD. CD47 is Required for Mesenchymal Progenitor Proliferation and Fracture Repair. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.06.583756. [PMID: 38496546 PMCID: PMC10942414 DOI: 10.1101/2024.03.06.583756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
CD47 is a ubiquitous and pleiotropic cell-surface receptor. Disrupting CD47 enhances injury repair in various tissues but the role of CD47 has not been studied in bone injuries. In a murine closed-fracture model, CD47-null mice showed decreased callus bone volume, bone mineral content, and tissue mineral content as assessed by microcomputed tomography 10 days post-fracture, and increased fibrous volume as determined by histology. To understand the cellular basis for this phenotype, mesenchymal progenitors (MSC) were harvested from bone marrow. CD47-null MSC showed decreased large fibroblast colony formation (CFU-F), significantly less proliferation, and fewer cells in S-phase, although osteoblast differentiation was unaffected. However, consistent with prior research, CD47-null endothelial cells showed increased proliferation relative to WT cells. Similarly, in a murine ischemic fracture model, CD47-null mice showed reduced fracture callus bone volume and bone mineral content relative to WT. Consistent with our in vitro results, in vivo EdU labeling showed decreased cell proliferation in the callus of CD47-null mice, while staining for CD31 and endomucin demonstrated increased endothelial cell mass. Finally, WT mice administered a CD47 morpholino, which blocks CD47 protein production, showed a callus phenotype similar to that of non-ischemic and ischemic fractures in CD47-null mice, suggesting the phenotype was not due to developmental changes in the knockout mice. Thus, inhibition of CD47 during bone healing reduces both non-ischemic and ischemic fracture healing, in part, by decreasing MSC proliferation. Furthermore, the increase in endothelial cell proliferation and early blood vessel density caused by CD47 disruption is not sufficient to overcome MSC dysfunction.
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Affiliation(s)
- Robert L. Zondervan
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, United States, 48109
- College of Osteopathic Medicine, Michigan State University, East Lansing, Michigan, United States, 48824
| | - Christina A. Capobianco
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, United States, 48109
- Department of Biomedical Engineering, University of Michigan, Ann Arbor Michigan, United States, 48109
| | - Daniel C. Jenkins
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, United States, 48109
| | - John D. Reicha
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, United States, 48109
| | - Livia M. Fredrick
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, United States, 48109
| | - Charles Lam
- Department of Orthopaedic Surgery, University of California at San Francisco, San Francisco, California, United States, 94142
| | - Jeffery S. Isenberg
- Department of Diabetes Complications and Metabolism and Arthur Riggs Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, California, United States, 91010
| | - Jaimo Ahn
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, United States, 48109
| | - Ralph S. Marcucio
- Department of Orthopaedic Surgery, University of California at San Francisco, San Francisco, California, United States, 94142
| | - Kurt D. Hankenson
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, United States, 48109
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7
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Li X, Yao Z, Qian J, Li H, Li H. Lactate Protects Intestinal Epithelial Barrier Function from Dextran Sulfate Sodium-Induced Damage by GPR81 Signaling. Nutrients 2024; 16:582. [PMID: 38474712 DOI: 10.3390/nu16050582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/15/2024] [Accepted: 02/18/2024] [Indexed: 03/14/2024] Open
Abstract
The dysregulation of the intestinal epithelial barrier significantly contributes to the inflammatory progression of ulcerative colitis. Recent studies have indicated that lactate, produced by gut bacteria or derived from fermented foods, plays a key role in modulating inflammation via G-protein-coupled receptor 81 (GPR81). In this study, we aimed to investigate the potential role of GPR81 in the progression of colitis and to assess the impact of lactate/GPR81 signaling on intestinal epithelial barrier function. Our findings demonstrated a downregulation of GPR81 protein expression in patients with colitis. Functional verification experiments showed that Gpr81-deficient mice exhibited more severe damage to the intestinal epithelial barrier and increased susceptibility to DSS-induced colitis, characterized by exacerbated oxidative stress, elevated inflammatory cytokine secretion, and impaired expression of tight-junction proteins. Mechanistically, we found that lactate could suppress TNF-α-induced MMP-9 expression and prevent the disruption of tight-junction proteins by inhibiting NF-κB activation through GPR81 in vitro. Furthermore, our study showed that dietary lactate could preserve intestinal epithelial barrier function against DSS-induced damage in a GPR81-dependent manner in vivo. Collectively, these results underscore the crucial involvement of the lactate/GPR81 signaling pathway in maintaining intestinal epithelial barrier function, providing a potential therapeutic strategy for ulcerative colitis.
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Affiliation(s)
- Xiaojing Li
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Zhijie Yao
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Jin Qian
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Hongling Li
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Haitao Li
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
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8
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Luissint AC, Fan S, Nishio H, Lerario AM, Miranda J, Hilgarth RS, Cook J, Nusrat A, Parkos CA. CXADR-Like Membrane Protein Regulates Colonic Epithelial Cell Proliferation and Prevents Tumor Growth. Gastroenterology 2024; 166:103-116.e9. [PMID: 37716376 DOI: 10.1053/j.gastro.2023.09.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 08/23/2023] [Accepted: 09/01/2023] [Indexed: 09/18/2023]
Abstract
BACKGROUND & AIMS CXADR-like membrane protein (CLMP) is structurally related to coxsackie and adenovirus receptor. Pathogenic variants in CLMP gene have been associated with congenital short bowel syndrome, implying a role for CLMP in intestinal development. However, the contribution of CLMP to regulating gut development and homeostasis is unknown. METHODS In this study, we investigated CLMP function in the colonic epithelium using complementary in vivo and in vitro approaches, including mice with inducible intestinal epithelial cell (IEC)-specific deletion of CLMP (ClmpΔIEC), intestinal organoids, IECs with overexpression, or loss of CLMP and RNA sequencing data from individuals with colorectal cancer. RESULTS Loss of CLMP enhanced IEC proliferation and, conversely, CLMP overexpression reduced proliferation. Xenograft experiments revealed increased tumor growth in mice implanted with CLMP-deficient colonic tumor cells, and poor engraftment was observed with CLMP-overexpressing cells. ClmpΔIEC mice showed exacerbated tumor burden in an azoxymethane and dextran sulfate sodium-induced colonic tumorigenesis model, and CLMP expression was reduced in human colorectal cancer samples. Mechanistic studies revealed that CLMP-dependent regulation of IEC proliferation is linked to signaling through mTOR-Akt-β-catenin pathways. CONCLUSIONS These results reveal novel insights into CLMP function in the colonic epithelium, highlighting an important role in regulating IEC proliferation, suggesting tumor suppressive function in colon cancer.
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Affiliation(s)
| | - Shuling Fan
- Department of Pathology, University of Michigan, Ann Arbor, Michigan
| | - Hikaru Nishio
- Department of Pathology, Emory University, Atlanta, Georgia
| | - Antonio M Lerario
- Department of Internal Medicine, Division of Metabolism, Endocrinology, and Diabetes, University of Michigan, Ann Arbor, Michigan
| | - Jael Miranda
- Department of Pathology, University of Michigan, Ann Arbor, Michigan
| | - Roland S Hilgarth
- Department of Pathology, University of Michigan, Ann Arbor, Michigan
| | - Jonas Cook
- Department of Pathology, University of Michigan, Ann Arbor, Michigan
| | - Asma Nusrat
- Department of Pathology, University of Michigan, Ann Arbor, Michigan.
| | - Charles A Parkos
- Department of Pathology, University of Michigan, Ann Arbor, Michigan.
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9
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Yin Z, Liu X, Guo L, Ren M, Kang W, Ma C, Waterhouse GIN, Sun-Waterhouse D. The potential of dietary fiber in building immunity against gastrointestinal and respiratory disorders. Crit Rev Food Sci Nutr 2023:1-19. [PMID: 37837407 DOI: 10.1080/10408398.2023.2266462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2023]
Abstract
The numerous health benefits of dietary fibers (DFs) justify their inclusion in human diets and biomedical products. Given the short- and long-term human impacts of the COVID-19 virus on human health, the potential of DFs in building immunity against gastrointestinal and respiratory disorders is currently receiving high attention. This paper reviews the physicochemical properties of DFs, together with their immune functions and effects on the gastrointestinal tract and respiratory system mainly based on research in the last ten years. Possible modes of action of DFs in promoting health, especially building immunity, are explored. We seek to highlight the importance of understanding the exact physical and chemical characteristics and molecular behaviors of DFs in providing specific immune function. This review provides a perspective beyond the existing recognition of DFs' positive effects on human health, and offers a theoretical framework for the development of special DFs components and their application in functional foods and other therapeutic products against gastrointestinal and respiratory disorders. DFs enhance immunity from gastrointestinal and respiratory diseases to promote host health.
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Affiliation(s)
- Zhenhua Yin
- National R &D Center for Edible Fungus Processing Technology, Henan University, Kaifeng, China
- Comprehensive Utilization of Edible and Medicinal Plant Resources Engineering Technology Research Center, Huanghe Science and Technology College, Zhengzhou, China
- Function Food Engineering Technology Research Center, Kaifeng, China
| | - Xiaopeng Liu
- National R &D Center for Edible Fungus Processing Technology, Henan University, Kaifeng, China
- Function Food Engineering Technology Research Center, Kaifeng, China
| | - Lin Guo
- National R &D Center for Edible Fungus Processing Technology, Henan University, Kaifeng, China
- Function Food Engineering Technology Research Center, Kaifeng, China
| | - Mengjie Ren
- National R &D Center for Edible Fungus Processing Technology, Henan University, Kaifeng, China
- Function Food Engineering Technology Research Center, Kaifeng, China
| | - Wenyi Kang
- National R &D Center for Edible Fungus Processing Technology, Henan University, Kaifeng, China
- Function Food Engineering Technology Research Center, Kaifeng, China
| | - Changyang Ma
- National R &D Center for Edible Fungus Processing Technology, Henan University, Kaifeng, China
- Function Food Engineering Technology Research Center, Kaifeng, China
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10
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Raya-Sandino A, Lozada-Soto KM, Rajagopal N, Garcia-Hernandez V, Luissint AC, Brazil JC, Cui G, Koval M, Parkos CA, Nangia S, Nusrat A. Claudin-23 reshapes epithelial tight junction architecture to regulate barrier function. Nat Commun 2023; 14:6214. [PMID: 37798277 PMCID: PMC10556055 DOI: 10.1038/s41467-023-41999-9] [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: 10/31/2022] [Accepted: 09/26/2023] [Indexed: 10/07/2023] Open
Abstract
Claudin family tight junction proteins form charge- and size-selective paracellular channels that regulate epithelial barrier function. In the gastrointestinal tract, barrier heterogeneity is attributed to differential claudin expression. Here, we show that claudin-23 (CLDN23) is enriched in luminal intestinal epithelial cells where it strengthens the epithelial barrier. Complementary approaches reveal that CLDN23 regulates paracellular ion and macromolecule permeability by associating with CLDN3 and CLDN4 and regulating their distribution in tight junctions. Computational modeling suggests that CLDN23 forms heteromeric and heterotypic complexes with CLDN3 and CLDN4 that have unique pore architecture and overall net charge. These computational simulation analyses further suggest that pore properties are interaction-dependent, since differently organized complexes with the same claudin stoichiometry form pores with unique architecture. Our findings provide insight into tight junction organization and propose a model whereby different claudins combine to form multiple distinct complexes that modify epithelial barrier function by altering tight junction structure.
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Affiliation(s)
- Arturo Raya-Sandino
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | | | - Nandhini Rajagopal
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY, USA
| | | | - Anny-Claude Luissint
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jennifer C Brazil
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Guiying Cui
- Department of Pediatrics, Emory + Children's Center for Cystic Fibrosis and Airways Disease Research, Emory University School of Medicine, Atlanta, GA, USA
| | - Michael Koval
- Departments of Medicine and Cell Biology, Emory University School of Medicine, Atlanta, GA, USA
| | - Charles A Parkos
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Shikha Nangia
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY, USA.
| | - Asma Nusrat
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA.
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11
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Zhang J, Li Z, Zhang Y, Guo YL, Zhu YR, Xia WX, Dai Y, Xia YF. Mume Fructus (Prunus mume Sieb. et Zucc.) extract accelerates colonic mucosal healing of mice with colitis induced by dextran sulfate sodium through potentiation of cPLA2-mediated lysophosphatidylcholine synthesis. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 119:154985. [PMID: 37516090 DOI: 10.1016/j.phymed.2023.154985] [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: 04/16/2023] [Revised: 06/15/2023] [Accepted: 07/15/2023] [Indexed: 07/31/2023]
Abstract
BACKGROUND Mume Fructus (MF) is the fruit of Prunus mume Sieb. et Zucc, a plant of Rosaceae family. Previous studies demonstrated that MF was capable of ameliorating ulcerative colitis (UC) in mice, its action mechanism needs to be clarified. PURPOSE This study deciphered whether and how MF extract accelerates colonic mucosal healing, the therapeutic endpoint of UC. METHODS Biochemical, histopathological and qRT-PCR analyses were utilized to define the therapeutic efficacy of MF on dextran sulfate sodium (DSS)-induced colitis in mice. UHPLC-QTOF-MS/MS-based metabolomics technique was adopted to explore the changes of endogenous metabolites associated with UC and responses to MF intervention. qRT-PCR analysis was performed to confirm the molecular pathway in vivo. The effects of MF and lysophosphatidylcholine (LPC) on cell viability, wound healing, proliferation, and migration were examined through a series of in vitro experiments. Moreover, the effects of different subtypes of phospholipase A2 (PLA2) inhibitors on MF-treated colonic epithelial cells were detected by wound healing test and transwell assay. RESULTS Orally administered MF could alleviate colitis in mice mainly by accelerating the healing of colonic mucosa. Guided by an unbiased metabolomics screen, we identified LPC synthesis as a major modifying pathway in colitis mice after MF treatment. Notably, MF facilitated the synthesis of LPC by enhancing the expression of PLA2 in colitis mice. Mechanistically, MF and LPC accelerated wound closure by promoting cell migration. Moreover, the promotion of MF on wound healing and migration of colonic epithelial cells was blunted by a cytosolic phospholipase A2 (cPLA2) inhibitor. CONCLUSION MF can facilitate colonic mucosal healing of mice with colitis through cPLA2-mediated intestinal LPC synthesis, which may become a novel therapeutic agent of UC.
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Affiliation(s)
- Jing Zhang
- Department of Pharmacognosy, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Ze Li
- Department of Pharmacognosy, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Ying Zhang
- Department of Pharmacognosy, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yi-Lei Guo
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yan-Rong Zhu
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Wen-Xin Xia
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yue Dai
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China.
| | - Yu-Feng Xia
- Department of Pharmacognosy, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China.
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12
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Haj-Yehia E, Korste S, Jochem R, Lusha A, Roth A, Dietzel N, Niroomand J, Stock P, Westendorf AM, Buer J, Hendgen-Cotta UB, Rassaf T, Totzeck M. CD47 blockade enhances phagocytosis of cardiac cell debris by neutrophils. IJC HEART & VASCULATURE 2023; 48:101269. [PMID: 37731517 PMCID: PMC10507185 DOI: 10.1016/j.ijcha.2023.101269] [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: 08/04/2023] [Revised: 09/01/2023] [Accepted: 09/05/2023] [Indexed: 09/22/2023]
Abstract
CD47 is a cell surface protein controlling phagocytotic activity of innate immune cells. CD47 blockade was investigated as an immune checkpoint therapy in cancer treatment, enhancing phagocytosis of tumor cells by macrophages. Anti-CD47 treatment also reduced injury size during reperfused acute myocardial infarction (repAMI) by enhancing phagocytotic acitivity of macrophages. Little is known about the impact of CD47 blockade on neutrophils, representing the main portion of early infiltrating immune cells after repAMI. Therefore, we performed 45 min of cardiac ischemia followed by 24 h of reperfusion, observing a decreased cardiac injury size measured by triphenyl tetrazolium chloride (TTC) Evan's blue staining. We were able to detect this effect with an innovative three-dimensional method based on light sheet fluorescence microscopy (LSFM). This further allowed us a simultaneous analysis of neutrophil infiltration, showing an unaltered amount of injury-associated neutrophils with reduced cardiac injury volume from repAMI. This observation suggests modulated phagocytosis of cell debris by neutrophils. Therefore, we performed flow cytometry analysis, revealing an increased phagocytotic activity of neutrophils in vitro. These findings highlight that CD47 blockade also enhances phagocytosis of cardiac cell debris by neutrophils, which might be an additional protective effect of anti-CD47 treatment after repAMI.
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Affiliation(s)
- Elias Haj-Yehia
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Sebastian Korste
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Robert Jochem
- Department of Nephrology, University Hospital Essen, 45147 Essen, Germany
| | - Aldona Lusha
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Anna Roth
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Nina Dietzel
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Josefine Niroomand
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Pia Stock
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Astrid M. Westendorf
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Jan Buer
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Ulrike B. Hendgen-Cotta
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Tienush Rassaf
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Matthias Totzeck
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
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13
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Garcia-Hernandez V, Raya-Sandino A, Azcutia V, Miranda J, Kelm M, Flemming S, Birkl D, Quiros M, Brazil JC, Parkos CA, Nusrat A. Inhibition of Soluble Stem Cell Factor Promotes Intestinal Mucosal Repair. Inflamm Bowel Dis 2023; 29:1133-1144. [PMID: 36688460 PMCID: PMC10320368 DOI: 10.1093/ibd/izad003] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Indexed: 01/24/2023]
Abstract
BACKGROUND Incidences of inflammatory bowel disease (IBD), including Crohn's disease and ulcerative colitis, are escalating worldwide and can be considered a global public health problem. Given that the gold standard approach to IBD therapeutics focuses on reducing the severity of symptoms, there is an urgent unmet need to develop alternative therapies that halt not only inflammatory processes but also promote mucosal repair. Previous studies have identified increased stem cell factor (SCF) expression in inflamed intestinal mucosal tissues. However, the role that SCF plays in mediating intestinal inflammation and repair has not been explored. METHODS Changes in the expression of SCF were evaluated in the colonic tissue of healthy mice and during dextran sodium sulfate (DSS)-induced colitis. Furthermore, mucosal wound healing and colitis severity were analyzed in mice subjected to either mechanical biopsy or DSS treatment, respectively, following intestinal epithelial cell-specific deletion of SCF or anti-SCF antibody administration. RESULTS We report robust expression of SCF by intestinal epithelial cells during intestinal homeostasis with a switch to immune cell-produced SCF during colitis. Data from mice with intestinal epithelial cell-specific deletion of SCF highlight the importance of immune cell-produced SCF in driving the pathogenesis of colitis. Importantly, antibody-mediated neutralization of total SCF or the specific SCF248 isoform decreased immune cell infiltration and enhanced mucosal wound repair following biopsy-induced colonic injury or DSS-induced colitis. CONCLUSIONS These data demonstrate that SCF functions as a pro-inflammatory mediator in mucosal tissues and that specific neutralization of SCF248 could be a viable therapeutic option to reduce intestinal inflammation and promote mucosal wound repair in individuals with IBD.
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Affiliation(s)
| | - Arturo Raya-Sandino
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Veronica Azcutia
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jael Miranda
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Matthias Kelm
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Sven Flemming
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Dorothee Birkl
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Miguel Quiros
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jennifer C Brazil
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Charles A Parkos
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Asma Nusrat
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
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14
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Miranda J, Brazil JC, Morris AH, Parkos CA, Quiros M, Nusrat A. Maresin-2 promotes mucosal repair and has therapeutic potential when encapsulated in thermostable nanoparticles. Proc Natl Acad Sci U S A 2023; 120:e2218162120. [PMID: 36669099 PMCID: PMC9942869 DOI: 10.1073/pnas.2218162120] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Resolution of inflammation and mucosal wound healing are crucial processes required to re-establish homeostasis following injury of mucosal tissues. Maresin-2 (MaR2), a lipid specialized pro-resolving mediator derived from omega-3 polyunsaturated fatty acid, has been reported to promote resolution of inflammation. However, a potential role for MaR2 in regulating mucosal repair remains undefined. Using lipidomic analyses, we demonstrate biosynthesis of MaR2 in healing intestinal mucosal wounds in vivo. Importantly, administration of exogenous MaR2 promoted mucosal repair following dextran sulfate sodium-induced colitis or biopsy-induced colonic mucosal injury. Functional analyses revealed that MaR2 promotes mucosal wound repair by driving intestinal epithelial migration through activation of focal cell-matrix adhesion signaling in primary human intestinal epithelial cells. Because of its labile nature, MaR2 is easily degradable and requires ultracold storage to maintain functionality. Thus, we created thermostable polylactic acid MaR2 nanoparticles that retain biological activity following extended storage at 4 °C or above. Taken together, these results establish MaR2 as a potent pro-repair lipid mediator with broad therapeutic potential for use in promoting mucosal repair in inflammatory diseases.
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Affiliation(s)
- Jael Miranda
- aDepartment of Pathology, University of Michigan, Ann Arbor, MI48109
| | | | - Aaron H. Morris
- bDepartment of Biomedical Engineering, University of Michigan, Ann Arbor, MI48109
| | - Charles A. Parkos
- aDepartment of Pathology, University of Michigan, Ann Arbor, MI48109
| | - Miguel Quiros
- aDepartment of Pathology, University of Michigan, Ann Arbor, MI48109
- 1To whom correspondence may be addressed. or
| | - Asma Nusrat
- aDepartment of Pathology, University of Michigan, Ann Arbor, MI48109
- 1To whom correspondence may be addressed. or
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15
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Hayashi S, Muraleedharan CK, Oku M, Tomar S, Hogan SP, Quiros M, Parkos CA, Nusrat A. Intestinal epithelial BLT1 promotes mucosal repair. JCI Insight 2022; 7:e162392. [PMID: 36301666 PMCID: PMC9746898 DOI: 10.1172/jci.insight.162392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 10/26/2022] [Indexed: 01/25/2023] Open
Abstract
Acute and chronic intestinal inflammation is associated with epithelial damage, resulting in mucosal wounds in the forms of erosions and ulcers in the intestinal tract. Intestinal epithelial cells (IECs) and immune cells in the wound milieu secrete cytokines and lipid mediators to influence repair. Leukotriene B4 (LTB4), a lipid chemokine, binds to its receptor BLT1 and promotes migration of immune cells to sites of active inflammation; however, a role for intestinal epithelial BLT1 during mucosal wound repair is not known. Here we report that BLT1 was expressed in IECs both in vitro and in vivo, where it functioned as a receptor not only for LTB4 but also for another ligand, resolvin E1. Intestinal epithelial BLT1 expression was increased when epithelial cells were exposed to an inflammatory microenvironment. Using human and murine primary colonic epithelial cells, we reveal that the LTB4/BLT1 pathway promoted epithelial migration and proliferation leading to accelerated epithelial wound repair. Furthermore, in vivo intestinal wound repair experiments in BLT1-deficient mice and bone marrow chimeras demonstrated an important contribution of epithelial BLT1 during colonic mucosal wound repair. Taken together, our findings show a potentially novel prorepair in IEC mechanism mediated by BLT1 signaling.
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Affiliation(s)
- Shusaku Hayashi
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
- Institute of Natural Medicine, University of Toyama, Toyama, Japan
| | | | - Makito Oku
- Institute of Natural Medicine, University of Toyama, Toyama, Japan
| | - Sunil Tomar
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Simon P. Hogan
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Miguel Quiros
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Charles A. Parkos
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Asma Nusrat
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
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16
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Azcutia V, Kelm M, Kim S, Luissint AC, Flemming S, Abernathy-Close L, Young VB, Nusrat A, Miller MJ, Parkos CA. Distinct stimulus-dependent neutrophil dynamics revealed by real-time imaging of intestinal mucosa after acute injury. PNAS NEXUS 2022; 1:pgac249. [PMID: 36712325 PMCID: PMC9802210 DOI: 10.1093/pnasnexus/pgac249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 10/31/2022] [Indexed: 11/06/2022]
Abstract
Clinical symptoms in many inflammatory diseases of the intestine are directly related to neutrophil (PMN) migration across colonic mucosa and into the intestinal lumen, yet in-vivo studies detailing this process are lacking. Using real-time intravital microscopy and a new distal colon loop model, we report distinct PMN migratory dynamics in response to several models of acute colonic injury. PMNs exhibited rapid swarming responses after mechanically induced intestinal wounds. Similar numbers of PMNs infiltrated colonic mucosa after wounding in germ-free mice, suggesting microbiota-independent mechanisms. By contrast, acute mucosal injury secondary to either a treatment of mice with dextran sodium sulfate or an IL-10 receptor blockade model of colitis resulted in lamina propria infiltration with PMNs that were largely immotile. Biopsy wounding of colonic mucosa in DSS-treated mice did not result in enhanced PMN swarming however, intraluminal application of the neutrophil chemoattractant LTB4 under such conditions resulted in enhanced transepithelial migration of PMNs. Analyses of PMNs that had migrated into the colonic lumen revealed that the majority of PMNs were directly recruited from the circulation and not from the immotile pool in the mucosa. Decreased PMN motility parallels upregulation of the receptor CXCR4 and apoptosis. Similarly, increased expression of CXCR4 on human PMNs was observed in colonic biopsies from people with active ulcerative colitis. This new approach adds an important tool to investigate mechanisms regulating PMN migration across mucosa within the distal intestine and will provide new insights for developing future anti-inflammatory and pro-repair therapies.
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Affiliation(s)
- Veronica Azcutia
- Department of Pathology, University of Michigan; Ann Arbor, MI 48109, USA
| | - Matthias Kelm
- Department of Pathology, University of Michigan; Ann Arbor, MI 48109, USA
| | - Seonyoung Kim
- Department of Internal Medicine, Washington University School of Medicine; Saint Louis, MO 63110, USA
| | | | - Sven Flemming
- Department of Pathology, University of Michigan; Ann Arbor, MI 48109, USA
| | - Lisa Abernathy-Close
- Department of Internal Medicine/Division of Infectious Diseases, University of Michigan; Ann Arbor, MI 48109, USA
| | - Vincent B Young
- Department of Internal Medicine/Division of Infectious Diseases, University of Michigan; Ann Arbor, MI 48109, USA.,Department of Microbiology and Immunology, University of Michigan; Ann Arbor, MI 48109, USA
| | - Asma Nusrat
- Department of Pathology, University of Michigan; Ann Arbor, MI 48109, USA
| | - Mark J Miller
- Department of Internal Medicine, Washington University School of Medicine; Saint Louis, MO 63110, USA
| | - Charles A Parkos
- Department of Pathology, University of Michigan; Ann Arbor, MI 48109, USA
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17
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Fan S, Boerner K, Muraleedharan CK, Nusrat A, Quiros M, Parkos CA. Epithelial JAM-A is fundamental for intestinal wound repair in vivo. JCI Insight 2022; 7:e158934. [PMID: 35943805 PMCID: PMC9536273 DOI: 10.1172/jci.insight.158934] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 08/03/2022] [Indexed: 12/01/2022] Open
Abstract
Junctional adhesion molecule-A (JAM-A) is expressed in several cell types, including epithelial and endothelial cells, as well as some leukocytes. In intestinal epithelial cells (IEC), JAM-A localizes to cell junctions and plays a role in regulating barrier function. In vitro studies with model cell lines have shown that JAM-A contributes to IEC migration; however, in vivo studies investigating the role of JAM-A in cell migration-dependent processes such as mucosal wound repair have not been performed. In this study, we developed an inducible intestinal epithelial-specific JAM-A-knockdown mouse model (Jam-aERΔIEC). While acute induction of IEC-specific loss of JAM-A did not result in spontaneous colitis, such mice had significantly impaired mucosal healing after chemically induced colitis and after biopsy colonic wounding. In vitro primary cultures of JAM-A-deficient IEC demonstrated impaired migration in wound healing assays. Mechanistic studies revealed that JAM-A stabilizes formation of protein signaling complexes containing Rap1A/Talin/β1 integrin at focal adhesions of migrating IECs. Loss of JAM-A in primary IEC led to decreased Rap1A activity and protein levels of Talin and β1 integrin, and it led to a reduction in focal adhesion structures. These findings suggest that epithelial JAM-A plays a critical role in controlling mucosal repair in vivo through dynamic regulation of focal adhesions.
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18
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Kelm M, Anger F. Mucosa and microbiota – the role of intrinsic parameters on intestinal wound healing. Front Surg 2022; 9:905049. [PMID: 35937599 PMCID: PMC9354512 DOI: 10.3389/fsurg.2022.905049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 07/06/2022] [Indexed: 11/13/2022] Open
Abstract
Mucosal healing in the gut is an essential process when it comes to chronic inflammatory disorders such as inflammatory bowel diseases (IBD) but also to the creation of intestinal anastomosis. Despite an improvement of surgical techniques, the rates of anastomotic leakage remain substantial and represent a significant health-care and socio-economic burden. Recent research has focused on intrinsic factors such as mucosal linings and differences in the intestinal microbiota and identified specific endoluminal bacteria and epithelial proteins which influence intestinal wound healing and re-establishment of mucosal homeostasis. Despite the lack of large clinical studies, previous data indicate that the identified bacteria such as aerotolerant lactobacilli or wound-associated Akkermansia muciniphila as well as epithelial-expressed sialyl Lewis glycans or CD47 might be critical for wound and anastomotic healing in the gut, thus, providing a potential novel approach for future treatment strategies in colorectal surgery and IBD therapy. Since microbiota and mucosa are interacting closely, we outline the current discoveries about both subsets in this review together to demonstrate the significant interplay
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19
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van Duijn A, Van der Burg SH, Scheeren FA. CD47/SIRPα axis: bridging innate and adaptive immunity. J Immunother Cancer 2022; 10:jitc-2022-004589. [PMID: 35831032 PMCID: PMC9280883 DOI: 10.1136/jitc-2022-004589] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/09/2022] [Indexed: 11/29/2022] Open
Abstract
Myeloid immune cells are frequently present in the tumor environment, and although they can positively contribute to tumor control they often negatively impact anticancer immune responses. One way of inhibiting the positive contributions of myeloid cells is by signaling through the cluster of differentiation 47 (CD47)/signal regulatory protein alpha (SIRPα) axis. The SIRPα receptor is expressed on myeloid cells and is an inhibitory immune receptor that, upon binding to CD47 protein, delivers a ‘don’t eat me’ signal. As CD47 is often overexpressed on cancer cells, treatments targeting CD47/SIRPα have been under active investigation and are currently being tested in clinical settings. Interestingly, the CD47/SIRPα axis is also involved in T cell-mediated antitumor responses. In this perspective we provide an overview of recent studies showing how therapeutic blockade of the CD47/SIRPα axis improves the adaptive immune response. Furthermore, we discuss the interconnection between the myeloid CD47/SIRPα axis and adaptive T cell responses as well as the potential therapeutic role of the CD47/SIRPα axis in tumors with acquired resistance to the classic immunotherapy through major histocompatibility complex downregulation. Altogether this review provides a profound insight for the optimal exploitation of CD47/SIRPα immune checkpoint therapy.
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Affiliation(s)
- Anneloes van Duijn
- Department of Medical Oncology, Leiden University Medical Center, Leiden, The Netherlands.,Department of Dermatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Sjoerd H Van der Burg
- Department of Medical Oncology, Oncode Institute, Leiden University Medical Center, Leiden, The Netherlands
| | - Ferenc A Scheeren
- Department of Dermatology, Leiden University Medical Center, Leiden, The Netherlands
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20
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Huang J, Liu F, Li C, Liang X, Li C, Liu Y, Yi Z, Zhang L, Fu S, Zeng Y. Role of CD47 in tumor immunity: a potential target for combination therapy. Sci Rep 2022; 12:9803. [PMID: 35697717 PMCID: PMC9192775 DOI: 10.1038/s41598-022-13764-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 05/27/2022] [Indexed: 11/21/2022] Open
Abstract
CD47 performs a vital function in cancer therapy by binding to different SIRPα, thrombospondin 1, and integrin. However, its role in tumor immunity and its correlation with prognosis among many cancer types remain unknown. The raw mRNA expression data of CD47 in cancer patients was downloaded from TCGA and GTEx datasets. The protein expression of CD47 was detected using a microarray. Kaplan Meier analysis and forest plot were performed to compare the effects of high and low expression of CD47 on overall survival in different cancers. In addition, the correlations between CD47 expression and immune cell infiltration, stromal components, immune checkpoint genes, tumor mutational burden (TMB), and microsatellite instability (MSI) were analyzed from the public database. The gene function was determined by Gene Set Enrichment Analysis (GSEA). The expressions of CD47 in CHOL, COAD, ESCA, HNSC, KIRC, STAD, and THCA were higher compared with normal tissues. Elevated expression of CD47 predicted poor prognosis in ACC, KICH, KIRP, LGG, PAAD and UCEC. CD47 expression was strongly associated with immune infiltrating cells among KICH, KIRP, LGG, and PAAD. In addition, significant positive correlations with most immune checkpoint genes including PDCD 1 (PD-1), CD274 (PD-L1), CTLA4 in BLCA, DLBC, KICH, KIRC, LUAD, LUSC, PAAD, PCPG, SKCM, STAD, UCEC, and UVM was noted for the expression of CD47. GSEA analysis demonstrated that CD47 was a key regulator in metabolism-related pathways. These findings provide novel evidence that CD47 could be utilized as a promising prognostic biomarker and combination treatment target in various cancers.
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Affiliation(s)
- Jing Huang
- Psychiatry Department and Mental Health Institute of the Second Xiangya Hospital, Central South University, Changsha, Hunan, China.,National Clinical Research Center on Mental Disorders and National Technology Institute on Mental Disorders, Changsha, Hunan, China
| | - Fangkun Liu
- Department of Neurosurgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Chenglong Li
- Department of Neurosurgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Xisong Liang
- Department of Neurosurgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Chuntao Li
- Department of Neurosurgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Yuanyuan Liu
- Department of Neurosurgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Zhenjie Yi
- Department of Neurosurgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Liyang Zhang
- Department of Neurosurgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Siqi Fu
- Department of Dermatology, The Second Xiangya Hospital, Central South University, 72 Renmin Road, Changsha, 410008, Hunan, China.
| | - Yu Zeng
- Department of Neurosurgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China. .,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China.
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21
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Rana N, Privitera G, Kondolf HC, Bulek K, Lechuga S, De Salvo C, Corridoni D, Antanaviciute A, Maywald RL, Hurtado AM, Zhao J, Huang EH, Li X, Chan ER, Simmons A, Bamias G, Abbott DW, Heaney JD, Ivanov AI, Pizarro TT. GSDMB is increased in IBD and regulates epithelial restitution/repair independent of pyroptosis. Cell 2022; 185:283-298.e17. [PMID: 35021065 PMCID: PMC8879997 DOI: 10.1016/j.cell.2021.12.024] [Citation(s) in RCA: 90] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 10/09/2021] [Accepted: 12/16/2021] [Indexed: 02/08/2023]
Abstract
Gasdermins are a family of structurally related proteins originally described for their role in pyroptosis. Gasdermin B (GSDMB) is currently the least studied, and while its association with genetic susceptibility to chronic mucosal inflammatory disorders is well established, little is known about its functional relevance during active disease states. Herein, we report increased GSDMB in inflammatory bowel disease, with single-cell analysis identifying epithelial specificity to inflamed colonocytes/crypt top colonocytes. Surprisingly, mechanistic experiments and transcriptome profiling reveal lack of inherent GSDMB-dependent pyroptosis in activated epithelial cells and organoids but instead point to increased proliferation and migration during in vitro wound closure, which arrests in GSDMB-deficient cells that display hyper-adhesiveness and enhanced formation of vinculin-based focal adhesions dependent on PDGF-A-mediated FAK phosphorylation. Importantly, carriage of disease-associated GSDMB SNPs confers functional defects, disrupting epithelial restitution/repair, which, altogether, establishes GSDMB as a critical factor for restoration of epithelial barrier function and the resolution of inflammation.
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Affiliation(s)
- Nitish Rana
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA; Departments of Physiology & Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Giuseppe Privitera
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Hannah C Kondolf
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Katarzyna Bulek
- Department of Inflammation & Immunity, Learner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - Susana Lechuga
- Department of Inflammation & Immunity, Learner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - Carlo De Salvo
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Daniele Corridoni
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Agne Antanaviciute
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Rebecca L Maywald
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Alexander M Hurtado
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Junjie Zhao
- Department of Inflammation & Immunity, Learner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - Emina H Huang
- Departments of Cancer Biology and Colon & Rectal Surgery, Learner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Xiaoxia Li
- Department of Inflammation & Immunity, Learner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - E Ricky Chan
- Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Alison Simmons
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Giorgos Bamias
- Academic Department of Gastroenterology, Ethnikon & Kapodistriakon University of Athens, Laikon Hospital, Athens, Greece
| | - Derek W Abbott
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Jason D Heaney
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Andrei I Ivanov
- Department of Inflammation & Immunity, Learner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - Theresa T Pizarro
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
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22
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Mueller PA, Kojima Y, Huynh KT, Maldonado RA, Ye J, Tavori H, Pamir N, Leeper NJ, Fazio S. Macrophage LRP1 (Low-Density Lipoprotein Receptor-Related Protein 1) Is Required for the Effect of CD47 Blockade on Efferocytosis and Atherogenesis-Brief Report. Arterioscler Thromb Vasc Biol 2022; 42:e1-e9. [PMID: 34758632 PMCID: PMC8702482 DOI: 10.1161/atvbaha.121.316854] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVE Antibody blockade of the "do not eat me" signal CD47 (cluster of differentiation 47) enhances efferocytosis and reduces lesion size and necrotic core formation in murine atherosclerosis. TNF (Tumor necrosis factor)-α expression directly enhances CD47 expression, and elevated TNF-α is observed in the absence of the proefferocytosis receptor LRP1 (low-density lipoprotein receptor-related protein 1), a regulator of atherogenesis and inflammation. Thus, we tested the hypothesis that CD47 blockade requires the presence of macrophage LRP1 to enhance efferocytosis, temper TNF-α-dependent inflammation, and limit atherosclerosis. Approach and Results: Mice lacking systemic apoE (apoE-/-), alone or in combination with the loss of macrophage LRP1 (double knockout), were fed a Western-type diet for 12 weeks while receiving anti-CD47 antibody (anti-CD47) or IgG every other day. In apoE-/- mice, treatment with anti-CD47 reduced lesion size by 25.4%, decreased necrotic core area by 34.5%, and decreased the ratio of free:macrophage-associated apoptotic bodies by 47.6% compared with IgG controls (P<0.05), confirming previous reports. Double knockout mice treated with anti-CD47 showed no differences in lesion size, necrotic core area, or the ratio of free:macrophage-associated apoptotic bodies compared with IgG controls. In vitro efferocytosis was 30% higher when apoE-/- phagocytes were incubated with anti-CD47 compared with IgG controls (P<0.05); however, anti-CD47 had no effect on efferocytosis in double knockout phagocytes. Analyses of mRNA and protein showed increased CD47 expression in anti-inflammatory IL (interleukin)-4 treated LRP1-/- macrophages compared with wild type, but no differences were observed in inflammatory lipopolysaccharide-treated macrophages. CONCLUSIONS The proefferocytosis receptor LRP1 in macrophages is necessary for anti-CD47 blockade to enhance efferocytosis, limit atherogenesis, and decrease necrotic core formation in the apoE-/- model of atherosclerosis.
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Affiliation(s)
- Paul A. Mueller
- Center for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR
| | - Yoko Kojima
- Department of Surgery, Division of Vascular Surgery, Stanford University School of Medicine, Stanford, CA
| | - Katherine T. Huynh
- Center for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR
| | - Richard A. Maldonado
- Center for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR
| | - Jianqin Ye
- Department of Surgery, Division of Vascular Surgery, Stanford University School of Medicine, Stanford, CA
| | - Hagai Tavori
- Center for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR
| | - Nathalie Pamir
- Center for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR
| | - Nicholas J. Leeper
- Department of Surgery, Division of Vascular Surgery, Stanford University School of Medicine, Stanford, CA
- Department of Medicine, Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA
| | - Sergio Fazio
- Center for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR
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23
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SIRPα - CD47 axis regulates dendritic cell-T cell interactions and TCR activation during T cell priming in spleen. PLoS One 2022; 17:e0266566. [PMID: 35413056 PMCID: PMC9004769 DOI: 10.1371/journal.pone.0266566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 03/22/2022] [Indexed: 11/19/2022] Open
Abstract
The SIRPα-CD47 axis plays an important role in T cell recruitment to sites of immune reaction and inflammation but its role in T cell antigen priming is incompletely understood. Employing OTII TCR transgenic mice bred to Cd47-/- (Cd47KO) or SKI mice, a knock-in transgenic animal expressing non-signaling cytoplasmic-truncated SIRPα, we investigated how the SIRPα-CD47 axis contributes to antigen priming. Here we show that adoptive transfer of Cd47KO or SKI Ova-specific CD4+ T cells (OTII) into Cd47KO and SKI recipients, followed by Ova immunization, elicited reduced T cell division and proliferation indices, increased apoptosis, and reduced expansion compared to transfer into WT mice. We confirmed prior reports that splenic T cell zone, CD4+ conventional dendritic cells (cDCs) and CD4+ T cell numbers were reduced in Cd47KO and SKI mice. We report that in vitro derived DCs from Cd47KO and SKI mice exhibited impaired migration in vivo and exhibited reduced CD11c+ DC proximity to OTII T cells in T cell zones after Ag immunization, which correlates with reduced TCR activation in transferred OTII T cells. These findings suggest that reduced numbers of CD4+ cDCs and their impaired migration contributes to reduced T cell-DC proximity in splenic T cell zone and reduced T cell TCR activation, cell division and proliferation, and indirectly increased T cell apoptosis.
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24
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Azcutia V, Kelm M, Luissint AC, Boerner K, Flemming S, Quiros M, Newton G, Nusrat A, Luscinskas FW, Parkos CA. Neutrophil expressed CD47 regulates CD11b/CD18-dependent neutrophil transepithelial migration in the intestine in vivo. Mucosal Immunol 2021; 14:331-341. [PMID: 32561828 PMCID: PMC7749029 DOI: 10.1038/s41385-020-0316-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/24/2020] [Accepted: 06/04/2020] [Indexed: 02/04/2023]
Abstract
Dysregulated neutrophil (PMN) transmigration across epithelial surfaces (TEpM) significantly contributes to chronic inflammatory diseases, yet mechanisms defining this process remain poorly understood. In the intestine, uncontrolled PMN TEpM is a hallmark of disease flares in ulcerative colitis. Previous in vitro studies directed at identifying molecular determinants that mediate TEpM have shown that plasma membrane proteins including CD47 and CD11b/CD18 play key roles in regulating PMN TEpM across monolayers of intestinal epithelial cells. Here, we show that CD47 modulates PMN TEpM in vivo using an ileal loop assay. Importantly, using novel tissue-specific CD47 knockout mice and in vitro approaches, we report that PMN-expressed, but not epithelial-expressed CD47 plays a major role in regulating PMN TEpM. We show that CD47 associates with CD11b/CD18 in the plasma membrane of PMN, and that loss of CD47 results in impaired CD11b/CD18 activation. In addition, in vitro and in vivo studies using function blocking antibodies support a role of CD47 in regulating CD11b-dependent PMN TEpM and chemotaxis. Taken together, these findings provide new insights for developing approaches to target dysregulated PMN infiltration in the intestine. Moreover, tissue-specific CD47 knockout mice constitute an important new tool to study contributions of cells expressing CD47 to inflammation in vivo.
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Affiliation(s)
- Veronica Azcutia
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA.,Correspondence to:Veronica Azcutia, PhD. Department of Pathology, University of Michigan School of Medicine, 109 Zina Pitcher, BSRB Rm-4620. Ann Arbor, Michigan 48109, USA. Tel: (734) 936-1856 ; Charles A. Parkos, MD, PhD. Department of Pathology, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC 30-1537. Ann Arbor, Michigan 48109, USA. Tel: (734) 763-6384 Fax: (734) 763-4782
| | - Matthias Kelm
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Anny-Claude Luissint
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Kevin Boerner
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Sven Flemming
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Miguel Quiros
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Gail Newton
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women’s Hospital, Boston, MA 02115, USA.,Harvard Medical School, Boston, MA 02115, USA
| | - Asma Nusrat
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Francis W. Luscinskas
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women’s Hospital, Boston, MA 02115, USA.,Harvard Medical School, Boston, MA 02115, USA
| | - Charles A. Parkos
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA.,Correspondence to:Veronica Azcutia, PhD. Department of Pathology, University of Michigan School of Medicine, 109 Zina Pitcher, BSRB Rm-4620. Ann Arbor, Michigan 48109, USA. Tel: (734) 936-1856 ; Charles A. Parkos, MD, PhD. Department of Pathology, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC 30-1537. Ann Arbor, Michigan 48109, USA. Tel: (734) 763-6384 Fax: (734) 763-4782
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25
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Garcia-Hernandez V, Neumann PA, Koch S, Lyons R, Nusrat A, Parkos CA. Systematic Scoring Analysis for Intestinal Inflammation in a Murine Dextran Sodium Sulfate-Induced Colitis Model. J Vis Exp 2021:10.3791/62135. [PMID: 33645585 PMCID: PMC10475894 DOI: 10.3791/62135] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Murine colitis models are tools that are extensively employed in studies focused on understanding the pathobiology of inflammatory intestinal disorders. However, robust standards for objective and reproducible quantification of disease severity remain to be defined. Most colitis analysis methods rely on limited histological scoring of small segments of intestine, leading to partial or biased analyses. Here, we combine high-resolution image acquisition and longitudinal analysis of the entire colon to quantify intestinal injury and ulceration in the dextran sodium sulfate (DSS) induced model of murine colitis. This protocol allows for the generation of objective and reproducible results without extensive user training. Here, we provide comprehensive details on sample preparation and image analysis using examples of data from DSS induced colitis. This method can be easily adapted to other models of murine colitis that have significant inflammation associated with mucosal injury. We demonstrate that the fraction of inflamed/injured and eroded/ulcerated mucosa relative to the complete length of the colon closely parallels clinical findings such as weight loss amid DSS-induced disease progression. This histological protocol provides a reliable time and cost-effective aid to standardize analyses of disease activity in an unbiased way in DSS colitis experiments.
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Affiliation(s)
| | | | - Stefan Koch
- Wallenberg Centre for Molecular Medicine, Linköping University; Department of Biomedical and Clinical Sciences (BKV), Linköping University
| | - Renae Lyons
- Department of Pathology, University of Michigan
| | - Asma Nusrat
- Department of Pathology, University of Michigan;
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26
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Kaur S, Isenberg JS, Roberts DD. CD47 (Cluster of Differentiation 47). ATLAS OF GENETICS AND CYTOGENETICS IN ONCOLOGY AND HAEMATOLOGY 2021; 25:83-102. [PMID: 34707698 PMCID: PMC8547767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
CD47, also known as integrin-associated protein, is a constitutively and ubiquitously expressed transmembrane receptor. CD47 is conserved across amniotes including mammals, reptiles, and birds. Expression is increased in many cancers and, in non-malignant cells, by stress and with aging. The up-regulation of CD47 expression is generally epigenetic, whereas gene amplification occurs with low frequency in some cancers. CD47 is a high affinity signaling receptor for the secreted protein thrombospondin-1 (THBS1) and the counter-receptor for signal regulatory protein-α (SIRPA, SIRPα) and SIRPγ (SIRPG). CD47 interaction with SIRPα serves as a marker of self to innate immune cells and thereby protects cancer cells from phagocytic clearance. Consequently, higher CD47 correlates with a poor prognosis in some cancers, and therapeutic blockade can suppress tumor growth by enhancing innate antitumor immunity. CD47 expressed on cytotoxic T cells, dendritic cells, and NK cells mediates inhibitory THBS1 signaling that further limits antitumor immunity. CD47 laterally associates with several integrins and thereby regulates cell adhesion and migration. CD47 has additional lateral binding partners in specific cell types, and ligation of CD47 in some cases modulates their function. THBS1-CD47 signaling in non-malignant cells inhibits nitric oxide/cGMP, calcium, and VEGF signaling, mitochondrial homeostasis, stem cell maintenance, protective autophagy, and DNA damage response, and promotes NADPH oxidase activity. CD47 signaling is a physiological regulator of platelet activation, angiogenesis and blood flow. THBS1/CD47 signaling is frequently dysregulated in chronic diseases.
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Affiliation(s)
- Sukhbir Kaur
- Laboratory of Pathology, Center for Cancer Research, NCI, NIH, Bethesda, MD, 20892, USA
| | | | - David D Roberts
- Laboratory of Pathology, Center for Cancer Research, NCI, NIH, Bethesda, MD, 20892, USA
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27
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Sun Y, Lin J, Luo Z, Zhang Y, Chen J. The Serum from Patients with Secondary Frozen Shoulder Following Rotator Cuff Repair Induces Shoulder Capsule Fibrosis and Promotes Macrophage Polarization and Fibroblast Activation. J Inflamm Res 2021; 14:1055-1068. [PMID: 33790620 PMCID: PMC8001608 DOI: 10.2147/jir.s304555] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 03/10/2021] [Indexed: 02/05/2023] Open
Abstract
PURPOSE Disorders with systematic inflammation were prognostic for secondary frozen shoulder (sFS) following rotator cuff repair (RCR); however, how systematic inflammation affects sFS remains unclear. The aim of this study was to observe the effect of pre-operative serum from patients with sFS and the serum from those without on shoulder capsule in mice, and on macrophages and fibroblasts in vitro. METHODS Serum samples of a consecutive cohort of patients for RCR were collected pre-operatively. Three months after RCR, patients who developed sFS (Group S) were identified. Serum samples from gender- and age-matched controls without sFS (group NS) were also picked out. Firstly, the effect of serum on shoulder capsule fibrosis was observed histologically and biomechanically in a mouse model of RCR. Secondly, the roles of the serum on macrophage polarization and fibroblast activation were investigated, and the potentially involved signaling pathways were identified. Finally, inflammation and fibrosis-related cytokines in serum were quantified. RESULTS In our cohort, all patients had free pre-operative shoulder range of motion. Seven patients developed sFS at 3 months after surgery. Seven matched patients without sFS were selected as control. The inter-group difference of basic characteristics was not significant. Compared to the serum of group NS, the serum of group S significantly induced hypercellularity, capsular thickening, and range of motion deficiency in mice shoulders after RCR. Compared to the serum of group NS, samples of group S significantly promoted M2 polarization of THP-1 human macrophages and the activation of human capsule-derived fibroblasts. Meanwhile, Smad3 and p-Smad3 in macrophages and fibroblasts were significantly up-regulated. On the other hand, levels of inflammation and fibrosis-related cytokines were not significantly different between serum in group S and group NS. CONCLUSION Although all patients in this cohort had free range of motion pre-operatively, the pre-operative serum from patients with sFS at 3 months after RCR could act as a trigger of shoulder capsule fibrosis post-operatively. This effect may be related to its promotion on macrophage polarization to M2 phenotype and fibroblast activation.
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Affiliation(s)
- Yaying Sun
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People’s Republic of China
| | - Jinrong Lin
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People’s Republic of China
| | - Zhiwen Luo
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People’s Republic of China
| | - Yuhan Zhang
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People’s Republic of China
| | - Jiwu Chen
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People’s Republic of China
- Correspondence: Jiwu Chen Department of Sports Medicine, Huashan Hospital, Fudan University, 12# Middle Wulumuqi Road, Jing’an District, Shanghai, 200040, People’s Republic of ChinaFax +86 21 52888255 Email
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28
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Yang R, Hu X, Xie X, Chen H, Fang H, Zhu L, Li Z. Propionic Acid Targets the TLR4/NF- κB Signaling Pathway and Inhibits LPS-Induced Intestinal Barrier Dysfunction: In Vitro and In Vivo Studies. Front Pharmacol 2020; 11:573475. [PMID: 33041816 PMCID: PMC7530265 DOI: 10.3389/fphar.2020.573475] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/28/2020] [Indexed: 12/14/2022] Open
Abstract
Intestinal barrier dysfunction contributes to the development of intestinal diseases. Propionic acid (PA), a metabolite generated by anaerobic fermentation of dietary fiber in the intestinal cavity, has been proved to exert anti-inflammatory effects in a variety of diseases. However, the exact role of PA in LPS-induced intestinal barrier dysfunction is still unclear. Accordingly, we examined the latent mechanism of PA and its protective role in LPS-induced intestinal barrier dysfunction by both in vitro and in vivo experiments. In vitro, we identified that PA treatment could strongly promote cell migration, inhibit activation of NLRP3 inflammasome and maintain intestinal barrier function in LPS-induced IEC-6 cells, indicating the protective effect on the intestinal barrier function of PA. Further investigation of the mechanism involved revealed that PA could suppress the activation of TLR4/NF-κB pathway. In vivo, in a LPS-induced rat model, PA-induced protective effects in intestinal barrier dysfunction could be detected. In summary, our findings clarify the role of PA in intestinal barrier dysfunction and suggest that it is promising for the treatment of LPS-related intestinal diseases.
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Affiliation(s)
- Randong Yang
- Department of Pediatric Surgery, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xiaoxiao Hu
- Department of Pediatric Surgery, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xianzheng Xie
- Department of Pediatric Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Haiqiong Chen
- Department of Pediatric Surgery, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Huangyi Fang
- Department of Pediatric Surgery, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Libing Zhu
- Department of Pediatric Surgery, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Zhongrong Li
- Department of Pediatric Surgery, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
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29
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Hu C, Luo R, Wang Y. Heart Valves Cross-Linked with Erythrocyte Membrane Drug-Loaded Nanoparticles as a Biomimetic Strategy for Anti-coagulation, Anti-inflammation, Anti-calcification, and Endothelialization. ACS APPLIED MATERIALS & INTERFACES 2020; 12:41113-41126. [PMID: 32833422 DOI: 10.1021/acsami.0c12688] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In recent years, valvular heart disease has become a serious disease threatening human life and is a major cause of death worldwide. However, the glutaraldehyde (GLU)-treated biological heart valves (BHVs) fail to meet all requirements of clinical application due to disadvantages such as valve thrombus, cytotoxicity, endothelialization difficulty, immune response, and calcification. Encouragingly, there are a large number of carboxyls as well as a few amino groups on the surface of GLU-treated BHVs that can be modified to enhance biocompatibility. Inspired by natural biological systems, we report a novel approach in which the heart valve was cross-linked with erythrocyte membrane biomimetic drug-loaded nanoparticles. Such modified heart valves not only preserved the structural integrity, stability, and mechanical properties of the GLU-treated BHVs but also greatly improved anti-coagulation, anti-inflammation, anti-calcification, and endothelialization. The in vitro results demonstrated that the modified heart valves had long-term anti-coagulation properties and enhanced endothelialization processes. The modified heart valves also showed good biocompatibility, including blood and cell biocompatibility. Most importantly, the modified heart valves reduced the TNF-α levels and increased IL-10 compared to GLU-treated BHVs. In vivo animal experiments also confirmed that the modified heart valves had an ultrastrong resistance to calcification after implantation in rats for 120 days. The mechanism of anti-calcification in vivo was mainly due to the controlled release of anti-inflammatory drugs that reduced the inflammatory response after valve implantation. In summary, this therapeutic approach based on BHVs cross-linking with erythrocyte membrane biomimetic nanoparticles sparks a novel design for valvular heart disease therapy.
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Affiliation(s)
- Cheng Hu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, People's Republic of China
| | - Rifang Luo
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, People's Republic of China
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, People's Republic of China
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30
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He Y, Sun X, Rong W, Yang R, Liang H, Qi Y, Li L, Zen K. CD47 is a negative regulator of intestinal epithelial cell self-renewal following DSS-induced experimental colitis. Sci Rep 2020; 10:10180. [PMID: 32576895 PMCID: PMC7311394 DOI: 10.1038/s41598-020-67152-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 06/04/2020] [Indexed: 02/06/2023] Open
Abstract
CD47 deficient mice are resistant to dextran sulfate sodium (DSS)-induced experimental colitis. The underlying mechanism, however, remains incompletely understood. In this study, we characterized the role of CD47 in modulating homeostasis of gastrointestinal tract. We found that CD47 expression in both human and mouse intestinal epithelium was upregulated in colitic condition compared to that under normal condition. In line with this, CD47 deficiency protected mice from DSS-induced colitis. Analysis based on both intestinal organoid and cultured cell assays showed that CD47 deficiency accelerated intestinal epithelial cell proliferation and migration. Mechanistically, western blot and functional assays indicated that CD47 deficiency promoting mouse intestinal epithelial cell proliferation and migration follow cell injury is likely through upregulating expression of four Yamanaka transcriptional factors Oct4, Sox2, Klf4 and c-Myc (OSKM in abbreviation). Our studies thus reveal CD47 as a negative regulator in intestinal epithelial cell renewal during colitis through downregulating OSKM transcriptional factors.
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Affiliation(s)
- Yueqin He
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China
| | - Xinlei Sun
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China
| | - Weiwei Rong
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China
| | - Rong Yang
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China
| | - Hongwei Liang
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China
| | - Ying Qi
- Department of Gastroenterology and Hepatology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Limin Li
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China.
- Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, Nanjing University, Nanjing, Jiangsu, 210093, China.
| | - Ke Zen
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China.
- Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, Nanjing University, Nanjing, Jiangsu, 210093, China.
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Kitamoto S, Nagao-Kitamoto H, Jiao Y, Gillilland MG, Hayashi A, Imai J, Sugihara K, Miyoshi M, Brazil JC, Kuffa P, Hill BD, Rizvi SM, Wen F, Bishu S, Inohara N, Eaton KA, Nusrat A, Lei YL, Giannobile WV, Kamada N. The Intermucosal Connection between the Mouth and Gut in Commensal Pathobiont-Driven Colitis. Cell 2020; 182:447-462.e14. [PMID: 32758418 DOI: 10.1016/j.cell.2020.05.048] [Citation(s) in RCA: 305] [Impact Index Per Article: 76.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 04/22/2020] [Accepted: 05/26/2020] [Indexed: 12/19/2022]
Abstract
The precise mechanism by which oral infection contributes to the pathogenesis of extra-oral diseases remains unclear. Here, we report that periodontal inflammation exacerbates gut inflammation in vivo. Periodontitis leads to expansion of oral pathobionts, including Klebsiella and Enterobacter species, in the oral cavity. Amassed oral pathobionts are ingested and translocate to the gut, where they activate the inflammasome in colonic mononuclear phagocytes, triggering inflammation. In parallel, periodontitis results in generation of oral pathobiont-reactive Th17 cells in the oral cavity. Oral pathobiont-reactive Th17 cells are imprinted with gut tropism and migrate to the inflamed gut. When in the gut, Th17 cells of oral origin can be activated by translocated oral pathobionts and cause development of colitis, but they are not activated by gut-resident microbes. Thus, oral inflammation, such as periodontitis, exacerbates gut inflammation by supplying the gut with both colitogenic pathobionts and pathogenic T cells.
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Affiliation(s)
- Sho Kitamoto
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Hiroko Nagao-Kitamoto
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Yizu Jiao
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA; Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Merritt G Gillilland
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Atsushi Hayashi
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA; Research Laboratory, Miyarisan Pharmaceutical Co., Ltd., Tokyo, Japan
| | - Jin Imai
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Kohei Sugihara
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Mao Miyoshi
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | | | - Peter Kuffa
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Brett D Hill
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Syed M Rizvi
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Fei Wen
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Shrinivas Bishu
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Naohiro Inohara
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA
| | - Kathryn A Eaton
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI, USA
| | - Asma Nusrat
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA
| | - Yu L Lei
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - William V Giannobile
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Nobuhiko Kamada
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.
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32
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Flemming S, Luissint AC, Kusters DHM, Raya-Sandino A, Fan S, Zhou DW, Hasegawa M, Garcia-Hernandez V, García AJ, Parkos CA, Nusrat A. Desmocollin-2 promotes intestinal mucosal repair by controlling integrin-dependent cell adhesion and migration. Mol Biol Cell 2020; 31:407-418. [PMID: 31967937 PMCID: PMC7185897 DOI: 10.1091/mbc.e19-12-0692] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The intestinal mucosa is lined by a single layer of epithelial cells that forms a tight barrier, separating luminal antigens and microbes from underlying tissue compartments. Mucosal damage results in a compromised epithelial barrier that can lead to excessive immune responses as observed in inflammatory bowel disease. Efficient wound repair is critical to reestablish the mucosal barrier and homeostasis. Intestinal epithelial cells (IEC) exclusively express the desmosomal cadherins, Desmoglein-2 and Desmocollin-2 (Dsc2) that contribute to mucosal homeostasis by strengthening intercellular adhesion between cells. Despite this important property, specific contributions of desmosomal cadherins to intestinal mucosal repair after injury remain poorly investigated in vivo. Here we show that mice with inducible conditional knockdown (KD) of Dsc2 in IEC (Villin-CreERT2; Dsc2 fl/fl) exhibited impaired mucosal repair after biopsy-induced colonic wounding and recovery from dextran sulfate sodium-induced colitis. In vitro analyses using human intestinal cell lines after KD of Dsc2 revealed delayed epithelial cell migration and repair after scratch-wound healing assay that was associated with reduced cell–matrix traction forces, decreased levels of integrin β1 and β4, and altered activity of the small GTPase Rap1. Taken together, these results demonstrate that epithelial Dsc2 is a key contributor to intestinal mucosal wound healing in vivo.
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Affiliation(s)
- Sven Flemming
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109
| | | | | | | | - Shuling Fan
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109
| | - Dennis W Zhou
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332
| | - Mizuho Hasegawa
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109
| | | | - Andrés J García
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332.,Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332
| | - Charles A Parkos
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109
| | - Asma Nusrat
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109
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