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Tavares de Sousa H, Ferreira M, Gullo I, Rocha AM, Pedro A, Leitão D, Oliveira C, Carneiro F, Magro F. Fibrosis-related transcriptome unveils a distinctive remodeling matrix pattern in penetrating ileal Crohn's disease. J Crohns Colitis 2024:jjae064. [PMID: 38700484 DOI: 10.1093/ecco-jcc/jjae064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Indexed: 05/05/2024]
Abstract
BACKGROUND AND AIMS Stricturing (B2) and penetrating (B3) ileal Crohn's disease have been reported to present similar levels of histopathological transmural fibrosis. This study aimed to compare the fibrosis-related transcriptomic profiles of penetrating and stricturing ileal Crohn's disease. METHODS Using Nanostring technology and comparative bioinformatics, we analyzed the expression of 787 fibrosis-related genes in 36 ileal surgical specimens, 12 B2 and 24 B3, the latter including 12 cases with associated stricture(s) (B3s) and 12 without (B3o). Quality control of extracted RNA was performed according to Nanostring parameters and principal component analysis for the distribution analysis. For the selection of the differentially expressed genes a p-adjusted <0.05 and Fold Change ≤-1.5 or ≥ 1.5 was adopted. qPCR and immunohistochemistry analyses were used to validate selected differentially expressed genes. RESULTS We included 34 patients with B2 and B3 phenotypes, balanced for age at diagnosis, age at surgery, gender, Crohn's disease localization, perianal disease and therapy. Inflammation and fibrosis histopathological scoring were similar in all cases. B2 and B3 groups showed a very good clustering regarding 30 significantly differentially expressed genes, all being remarkably upregulated in B3. More than half of these genes were involved in Crohn's disease fibrogenesis, while eight differentially expressed genes were so in other organs. The most significantly active biologic processes and pathways in penetrating disease were response to TGFβand matrix organization and degradation, as validated by immunohistochemistry. CONCLUSIONS Despite the histopathological similarities in fibrosis between stricturing and penetrating ileal Crohn's disease, their fibrosis-related transcriptomic profiles are distinct. Penetrating disease exhibits a distinctive transcriptomic landscape related to enhanced matrix remodeling.
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Affiliation(s)
- Helena Tavares de Sousa
- Gastroenterology Department, Algarve University Hospital Center (CHUA), Portimão, Portugal
- ABC-Algarve Biomedical Center, University of Algarve, Faro, Portugal
| | - Marta Ferreira
- Computer Science Department, Faculty of Sciences, University of Porto, Porto, Portugal
- Institute of Molecular Pathology and Immunology, University of Porto (IPATIMUP), Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
| | - Irene Gullo
- Institute of Molecular Pathology and Immunology, University of Porto (IPATIMUP), Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
- Department of Pathology, Centro Hospitalar de São João, Porto, Portugal
- Department of Pathology, Faculty of Medicine of the University of Porto (FMUP), Porto, Portugal
| | - Ana Mafalda Rocha
- Institute of Molecular Pathology and Immunology, University of Porto (IPATIMUP), Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
| | - Ana Pedro
- Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
| | - Dina Leitão
- Department of Pathology, Faculty of Medicine of the University of Porto (FMUP), Porto, Portugal
| | - Carla Oliveira
- Institute of Molecular Pathology and Immunology, University of Porto (IPATIMUP), Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
- Department of Pathology, Centro Hospitalar de São João, Porto, Portugal
| | - Fátima Carneiro
- Institute of Molecular Pathology and Immunology, University of Porto (IPATIMUP), Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
- Department of Pathology, Centro Hospitalar de São João, Porto, Portugal
- Department of Pathology, Faculty of Medicine of the University of Porto (FMUP), Porto, Portugal
| | - Fernando Magro
- Unit of Pharmacology and Therapeutics, Department of Biomedicine, Faculty of Medicine of the University of Porto (FMUP), Portugal
- Department of Gastroenterology, São João University Hospital Center, Porto, Portugal
- CINTESIS@RISE, Faculty of Medicine, University of Porto, Portugal
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Sato S, Ogawa Y, Shimizu E, Asai K, Okazaki T, Rusch R, Hirayama M, Shimmura S, Negishi K, Tsubota K. Cellular senescence promotes meibomian gland dysfunction in a chronic graft-versus-host disease mouse model. Ocul Surf 2024; 32:198-210. [PMID: 38499288 DOI: 10.1016/j.jtos.2024.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/27/2024] [Accepted: 03/12/2024] [Indexed: 03/20/2024]
Abstract
PURPOSE Aging is a well-established risk factor for meibomian gland dysfunction (MGD). We previously reported an accelerated cellular senescence phenomenon in the lacrimal glands of a murine model of chronic graft-versus-host disease (cGVHD). Herein, we aimed to elucidate the relationship between cellular senescence and MGD in cGVHD mice, utilizing the senolytic agent ABT-263. METHODS A cGVHD mouse model was established through allogeneic bone marrow transplantation (BMT) from B10.D2 to BALB/c mice. Subsequently, cGVHD mice were treated with either ABT-263 or vehicle. The eyelids of recipients were analyzed at 4-week intervals post-BMT in both groups. RESULTS Meibomian gland (MG) area was significantly smaller in cGVHD mice than in syngeneic control mice. ABT-263-treated mice retained a significantly larger MG area than their vehicle-treated counterparts. Pathological and immunohistochemical examinations revealed significant reductions in eyelid tissue inflammation and pathological fibrosis in the ABT-263 group compared to that in the vehicle-treated group. Additionally, expression of DNA damage markers, senescent cell markers, and senescence-associated secretory phenotype (SASP) factors was elevated in the eyelids of cGVHD mice compared with that in syngeneic mice. The expression of these cellular senescence-associated molecules was considerably suppressed in ABT-263-treated eyelids compared to that in vehicle-treated ones. CONCLUSIONS Cellular senescence, along with expression of SASP factors, exhibited increased activity in the eyelids, particularly in the MGs of cGVHD mice. ABT-263 mitigated the severity of MGD. These findings highlight the potential of targeting cellular senescence as an effective approach for MGD treatment in cGVHD.
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Affiliation(s)
- Shinri Sato
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.
| | - Yoko Ogawa
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.
| | - Eisuke Shimizu
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Kazuki Asai
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Takahiro Okazaki
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Robert Rusch
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Masatoshi Hirayama
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Shigeto Shimmura
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan; Fujita Medical Innovation Center Tokyo, Fujita Health University, Tokyo, Japan
| | - Kazuno Negishi
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
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Lenti MV, Santacroce G, Broglio G, Rossi CM, Di Sabatino A. Recent advances in intestinal fibrosis. Mol Aspects Med 2024; 96:101251. [PMID: 38359700 DOI: 10.1016/j.mam.2024.101251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/02/2023] [Accepted: 01/29/2024] [Indexed: 02/17/2024]
Abstract
Despite many progresses have been made in the treatment of inflammatory bowel disease, especially due to the increasing number of effective therapies, the development of tissue fibrosis is a very common occurrence along the natural history of this condition. To a certain extent, fibrogenesis is a physiological and necessary process in all those conditions characterised by chronic inflammation. However, the excessive deposition of extracellular matrix within the bowel wall will end up in the formation of strictures, with the consequent need for surgery. A number of mechanisms have been described in this process, but some of them are not yet clear. For sure, the main trigger is the presence of a persistent inflammatory status within the mucosa, which in turn favours the occurrence of a pro-fibrogenic environment. Among the main key players, myofibroblasts, fibroblasts, immune cells, growth factors and cytokines must be mentioned. Although there are no available therapies able to target fibrosis, the only way to prevent it is by controlling inflammation. In this review, we summarize the state of art of the mechanisms involved in gut fibrogenesis, how to diagnose it, and which potential targets could be druggable to tackle fibrosis.
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Affiliation(s)
- Marco Vincenzo Lenti
- Department of Internal Medicine and Medical Therapeutics, University of Pavia, First Department of Internal Medicine, San Matteo Hospital Foundation, Pavia, Italy
| | - Giovanni Santacroce
- Department of Internal Medicine and Medical Therapeutics, University of Pavia, First Department of Internal Medicine, San Matteo Hospital Foundation, Pavia, Italy
| | - Giacomo Broglio
- Department of Internal Medicine and Medical Therapeutics, University of Pavia, First Department of Internal Medicine, San Matteo Hospital Foundation, Pavia, Italy
| | - Carlo Maria Rossi
- Department of Internal Medicine and Medical Therapeutics, University of Pavia, First Department of Internal Medicine, San Matteo Hospital Foundation, Pavia, Italy
| | - Antonio Di Sabatino
- Department of Internal Medicine and Medical Therapeutics, University of Pavia, First Department of Internal Medicine, San Matteo Hospital Foundation, Pavia, Italy.
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Jurickova I, Dreskin BW, Angerman E, Bonkowski E, Tominaga K, Iwasawa K, Braun T, Takebe T, Helmrath MA, Haberman Y, Wells JM, Denson LA. Eicosatetraynoic Acid Regulates Pro-Fibrotic Pathways in an Induced Pluripotent Stem Cell Derived Macrophage:Human Intestinal Organoid Model of Crohn's Disease. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.30.577959. [PMID: 38352573 PMCID: PMC10862816 DOI: 10.1101/2024.01.30.577959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
Background and Aims We previously identified small molecules predicted to reverse an ileal gene signature for future Crohn's Disease (CD) strictures. Here we used a new human intestinal organoid (HIO) model system containing macrophages to test a lead candidate, eicosatetraynoic acid (ETYA). Methods Induced pluripotent stem cell lines (iPSC) were derived from CD patients and differentiated into macrophages and HIOs. Macrophages and macrophage:HIO co-cultures were exposed to lipopolysaccharide (LPS) with and without ETYA pre-treatment. Cytospin and flow cytometry characterized macrophage morphology and activation markers, and RNA sequencing defined the global pattern of macrophage gene expression. TaqMan Low Density Array, Luminex multiplex assay, immunohistologic staining, and sirius red polarized light microscopy were performed to measure macrophage cytokine production and HIO pro-fibrotic gene expression and collagen content. Results iPSC-derived macrophages exhibited morphology similar to primary macrophages and expressed inflammatory macrophage cell surface markers including CD64 and CD68. LPS-stimulated macrophages expressed a global pattern of gene expression enriched in CD ileal inflammatory macrophages and matrisome secreted products, and produced cytokines and chemokines including CCL2, IL1B, and OSM implicated in refractory disease. ETYA suppressed CD64 abundance and pro-fibrotic gene expression pathways in LPS stimulated macrophages. Co-culture of LPS-primed macrophages with HIO led to up-regulation of fibroblast activation genes including ACTA2 and COL1A1 , and an increase in HIO collagen content. ETYA pre-treatment prevented pro-fibrotic effects of LPS-primed macrophages. Conclusions ETYA inhibits pro-fibrotic effects of LPS-primed macrophages upon co-cultured HIO. This model may be used in future untargeted screens for small molecules to treat refractory CD.
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Jiang Q, Lei Z, Wang Z, Wang Q, Zhang Z, Liu X, Xing B, Li S, Guo X, Liu Y, Li X, Qi Y, Shu K, Zhang H, Huang Y, Lei T. Tumor-Associated Fibroblast-Derived Exosomal circDennd1b Promotes Pituitary Adenoma Progression by Modulating the miR-145-5p/ONECUT2 Axis and Activating the MAPK Pathway. Cancers (Basel) 2023; 15:3375. [PMID: 37444485 DOI: 10.3390/cancers15133375] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/16/2023] [Accepted: 06/23/2023] [Indexed: 07/15/2023] Open
Abstract
TAF participated in the progression of various cancers, including PA via the release of soluble factors. Exosomes belonged to extracellular vesicles, which were revealed as a crucial participator in intercellular communication. However, the expression pattern and effect of TAF-derived exosomes remained largely unknown in PA. In the present study, we performed in silico analysis based on public RNA-seq datasets to generate the circRNA/miRNA regulatory network. The qRT-PCR, Western blotting, RNA pull-down, and luciferase assay were performed to investigate the effect of TAF-derived exosomes. TAF-derived exosomal circDennd1b was significantly upregulated in PA and promoted the proliferation, migration, and invasion of PA cells via sponging miR-145-5p in PA cells. In addition, miR-145-5p directly regulated One Cut homeobox 2 (ONECUT2/OC2) expression and inhibited the promoting effect of ONECUT2 on PA. We further demonstrated that ONECUT2 transcriptionally increased fibroblast growth factor receptor 3 (FGFR3) expression, which further activates the mitogen-activated protein kinases (MAPK) pathway, thus promoting PA progression. Moreover, the suppression of TAFs by ABT-263 and ONECUT2 by CSRM617 inhibited the growth of PA. In conclusion, our study illustrated that TAF-derived exosomal circDennd1b affected PA progression via regulating ONECUT2 expression, which provides a potential therapeutic strategy against aggressive PA.
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Affiliation(s)
- Qian Jiang
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhuowei Lei
- Department of Orthopedics, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
| | - Zihan Wang
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Quanji Wang
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhuo Zhang
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xiaojin Liu
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Biao Xing
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Sihan Li
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xiang Guo
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yanchao Liu
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xingbo Li
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yiwei Qi
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Kai Shu
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
| | - Huaqiu Zhang
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yimin Huang
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Ting Lei
- Sino-German Neuro-Oncology Molecular Laboratory, Department of Neurosurgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue. 1095, Wuhan 430030, China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan 430030, China
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Deng Y, Wang R, Li X, Tan X, Zhang Y, Gooneratne R, Li J. Fish Oil Ameliorates Vibrio parahaemolyticus Infection in Mice by Restoring Colonic Microbiota, Metabolic Profiles, and Immune Homeostasis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:6920-6934. [PMID: 37126589 DOI: 10.1021/acs.jafc.2c08559] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The effect of fish oil (FO) on colonic function, immunity, and microbiota was investigated in Vibrio parahaemolyticus (Vp)-infected C57BL/6J mice. Mice intragastrically presupplemented with FO (4.0 mg) significantly reduced Vp infection as evidenced by stabilizing body weight and reducing disease activity index score and immune organ ratios. FO minimized colonic pathological damage, strengthened the mucosal barrier, and sustained epithelial permeability by increasing epithelial crypt depth, goblet cell numbers, and tight junctions and inhibiting colonic collagen accumulation and fibrosis protein expression. Mechanistically, FO enhanced immunity by decreasing colonic CD3+ T cells, increasing CD4+ T cells, downregulating the TLR4 pathway, reducing interleukin-17 (IL-17) and tumor necrosis factor-α, and increasing immune cytokine IL-4 and interferon-γ levels. Additionally, FO maintained colonic microbiota eubiosis by improving microbial diversity and boosting Clostridium, Akkermansia, and Roseburia growth and their derived propionic acid and butyric acid levels. Collectively, FO alleviated Vp infection by enriching beneficial colonic microbiota and metabolites and restoring immune homeostasis.
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Affiliation(s)
- Yijia Deng
- College of Food Science, Southwest University, Chongqing 400715, China
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, China
| | - Rundong Wang
- College of Food Science, Southwest University, Chongqing 400715, China
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, China
| | - Xuepeng Li
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, China
| | - Xiqian Tan
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, China
| | - Yuhao Zhang
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Ravi Gooneratne
- Department of Wine, Food and Molecular Biosciences, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, Canterbury, New Zealand
| | - Jianrong Li
- College of Food Science, Southwest University, Chongqing 400715, China
- College of Food Science and Engineering, Bohai University, Jinzhou 121013, China
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Steiner CA, Cartwright IM, Taylor CT, Colgan SP. Hypoxia-inducible factor as a bridge between healthy barrier function, wound healing, and fibrosis. Am J Physiol Cell Physiol 2022; 323:C866-C878. [PMID: 35912990 PMCID: PMC9467472 DOI: 10.1152/ajpcell.00227.2022] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/07/2022] [Accepted: 07/23/2022] [Indexed: 11/22/2022]
Abstract
The healthy mammalian intestine is lined by a single layer of epithelial cells. These cells provide a selectively permeable barrier to luminal contents and normally do so in an efficient and effective manner. Barrier function in the healthy mucosa is provided via several mechanisms including epithelial junctional complexes, mucus production, as well as mucosal-derived antimicrobial proteins. As tissue metabolism is central to the maintenance of homeostasis in the mucosa, intestinal [Formula: see text] levels are uniquely low due to counter-current blood flow and the presence of the microbiota, resulting in the stabilization of the transcription factor hypoxia-inducible factor (HIF). Ongoing studies have revealed that HIF molds normal intestinal metabolism and is central to the coordination of barrier regulation during both homeostasis and active disease. During acute inflammation, HIF is central to controlling the rapid restitution of the epithelium consistent with normal wound healing responses. In contrast, HIF may also contribute to the fibrostenotic response associated with chronic, nonresolving inflammation. As such, HIF may function as a double-edged sword in the overall course of the inflammatory response. Here, we review recent literature on the contribution of HIF to mucosal barrier function, wound healing, and fibrosis.
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Affiliation(s)
- Calen A Steiner
- Division of Gastroenterology and Hepatology, University of Colorado Anschutz Medical Campus, Aurora, Colorado
- Department of Medicine and the Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Ian M Cartwright
- Division of Gastroenterology and Hepatology, University of Colorado Anschutz Medical Campus, Aurora, Colorado
- Department of Medicine and the Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado
- Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, Colorado
| | - Cormac T Taylor
- School of Medicine, Conway Institute and Systems Biology Ireland, University College Dublin, Dublin, Ireland
| | - Sean P Colgan
- Division of Gastroenterology and Hepatology, University of Colorado Anschutz Medical Campus, Aurora, Colorado
- Department of Medicine and the Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora, Colorado
- Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, Colorado
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Lin X, Wang Y, Liu Z, Lin S, Tan J, He J, Hu F, Wu X, Ghosh S, Chen M, Liu F, Mao R. Intestinal strictures in Crohn's disease: a 2021 update. Therap Adv Gastroenterol 2022; 15:17562848221104951. [PMID: 35757383 PMCID: PMC9218441 DOI: 10.1177/17562848221104951] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 05/17/2022] [Indexed: 02/04/2023] Open
Abstract
Intestinal strictures remain one of the most intractable and common complications of Crohn's disease (CD). Approximately 70% of CD patients will develop fibrotic strictures after 10 years of CD diagnosis. Since specific antifibrotic therapies are unavailable, endoscopic balloon dilation and surgery remain the mainstay treatments despite a high recurrence rate. Besides, there are no reliable methods for accurately evaluating intestinal fibrosis. This is largely due to the fact that the mechanisms of initiation and propagation of intestinal fibrosis are poorly understood. There is growing evidence implying that the pathogenesis of stricturing CD involves the intricate interplay of factors including aberrant immune and nonimmune responses, host-microbiome dysbiosis, and genetic susceptibility. Currently, the progress on intestinal strictures has been fueled by the advent of novel techniques, such as single-cell sequencing, multi-omics, and artificial intelligence. Here, we perform a timely and comprehensive review of the substantial advances in intestinal strictures in 2021, aiming to provide prompt information regarding fibrosis and set the stage for the improvement of diagnosis, treatment, and prognosis of intestinal strictures.
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Affiliation(s)
- Xiaoxuan Lin
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yu Wang
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zishan Liu
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Sinan Lin
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jinyu Tan
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jinshen He
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Fan Hu
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiaomin Wu
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Subrata Ghosh
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Minhu Chen
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Fen Liu
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road 2nd, Guangzhou 510080, People’s Republic of China
| | - Ren Mao
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road 2nd, Guangzhou 510080, People’s Republic of China
- Department of Gastroenterology, Huidong People’s Hospital, Huizhou 516399, China
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