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Shi Y, Luo S, Zhai J, Chen Y. A novel causative role of imbalanced kynurenine pathway in ulcerative colitis: Upregulation of KMO and KYNU promotes intestinal inflammation. Biochim Biophys Acta Mol Basis Dis 2024; 1870:166929. [PMID: 37918679 DOI: 10.1016/j.bbadis.2023.166929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/14/2023] [Accepted: 10/25/2023] [Indexed: 11/04/2023]
Abstract
The kynurenine pathway (KP) is the principal metabolic route for the essential amino acid tryptophan (TRP). Recent advances have highlighted a pivotal role for several KP metabolites in inflammatory diseases, including ulcerative colitis (UC). However, the alterations of KP enzymes and their functional impact in UC remain poorly defined. Here, we focused on kynurenine 3-monooxygenase (KMO) and kynureninase (KYNU), which serve as critical branching enzymes in the KP. We observed that dextran sodium sulfate (DSS)-induced colitis mice exhibited disturbed TRP metabolism along with KMO and KYNU upregulated. In patients with active UC, both the expression of KMO and KYNU were positively correlated with inflammatory factors TNF-α and IL-1β. Pharmacological blockade of KMO or genetic silencing of KYNU suppressed IL-1β-triggered proinflammatory cytokines expression in intestinal epithelial cells. Furthermore, blockage of KMO by selective inhibitor Ro 61-8048 alleviated the symptoms of DSS-induced colitis in mice, accompanied by an expanded NAD+ pool and redox balance restoration. The protective role of Ro 61-8048 may be partly due to its effect on KP regulation, particularly in enhancing kynurenic acid production. In summary, our study provides new evidence for the proinflammatory property of KMO and KYNU in intestinal inflammation, hinting at a promising therapeutic approach in UC through targeting these enzymes.
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Affiliation(s)
- Yingying Shi
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Shangjian Luo
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Jinyang Zhai
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Yingwei Chen
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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2
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Adikusuma W, Firdayani F, Irham LM, Darmawi D, Hamidy MY, Nopitasari BL, Soraya S, Azizah N. Integrated genomic network analysis revealed potential of a druggable target for hemorrhoid treatment. Saudi Pharm J 2023; 31:101831. [PMID: 37965490 PMCID: PMC10641558 DOI: 10.1016/j.jsps.2023.101831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Accepted: 10/14/2023] [Indexed: 11/16/2023] Open
Abstract
Hemorrhoids are a prevalent medical condition that necessitates effective treatment options. The current options for treatment consist of oral medications, topical applications, or surgery, yet a scarcity of highly effective drugs still exists. Genetic markers provide promising avenues for investigating the treatment of hemorrhoids, as they may reveal intricate biological mechanisms and targeted drug therapies, ultimately enhancing more precise treatment tailored to the patient. This study aims to identify new drug candidates for treating hemorrhoids through a meticulous bioinformatics approach and integrated with genomic network analysis. After extracting 21 druggable target genes using DrugBank from 293 genes connected to hemorrhoids, 87 possible drugs were selected. Three of these drugs (ketamine, methylene blue, and fulvestrant) hold potential in addressing issues associated with hemorrhoids and have been supported by clinical or preclinical studies. Eighty-four compounds present new therapeutic possibilities for managing hemorrhoids. We highlight that our findings indicate that NOX1 and NOS3 genes are promising biomarkers, with NOS3 gaining significance owing to its robust systemic functional annotations. Sapropterin, an existing drug, is closely associated with NOS3, providing a clear target for biomarker-driven interventions. This study illustrates the potential of combining genomic network analysis with bioinformatics to repurpose drugs for treating hemorrhoids. Subsequent research will explore the mechanisms for utilizing NOS3 targeting in the treatment of hemorrhoids.
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Affiliation(s)
- Wirawan Adikusuma
- Departement of Pharmacy, University of Muhammadiyah Mataram, Mataram, Indonesia
- Research Center for Vaccine and Drugs, National Research and Innovation Agency (BRIN), South Tangerang, Indonesia
| | - Firdayani Firdayani
- Research Center for Vaccine and Drugs, National Research and Innovation Agency (BRIN), South Tangerang, Indonesia
| | | | - Darmawi Darmawi
- Department of Histology, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
- Graduate School in Biomedical Sciences, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
| | - Muhammad Yulis Hamidy
- Department of Pharmacology, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
| | | | - Soraya Soraya
- Master Program in Biomedical Sciences, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
| | - Nurul Azizah
- Master Program in Biomedical Sciences, Faculty of Medicine, Universitas Riau, Pekanbaru, Indonesia
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3
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Ward J, Zhang S, Sikora A, Michalski R, Yin Y, D'Alessio A, McLoughlin RM, Jaquet V, Fieschi F, Knaus UG. VEO-IBD NOX1 variant highlights a structural region essential for NOX/DUOX catalytic activity. Redox Biol 2023; 67:102905. [PMID: 37820403 PMCID: PMC10571032 DOI: 10.1016/j.redox.2023.102905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/14/2023] [Accepted: 09/25/2023] [Indexed: 10/13/2023] Open
Abstract
Inflammatory bowel diseases (IBD) are chronic intestinal disorders that result from an inappropriate inflammatory response to the microbiota in genetically susceptible individuals, often triggered by environmental stressors. Part of this response is the persistent inflammation and tissue injury associated with deficiency or excess of reactive oxygen species (ROS). The NADPH oxidase NOX1 is highly expressed in the intestinal epithelium, and inactivating NOX1 missense mutations are considered a risk factor for developing very early onset IBD. Albeit NOX1 has been linked to wound healing and host defence, many questions remain about its role in intestinal homeostasis and acute inflammatory conditions. Here, we used in vivo imaging in combination with inhibitor studies and germ-free conditions to conclusively identify NOX1 as essential superoxide generator for microbiota-dependent peroxynitrite production in homeostasis and during early endotoxemia. NOX1 loss-of-function variants cannot support peroxynitrite production, suggesting that the gut barrier is persistently weakened in these patients. One of the loss-of-function NOX1 variants, NOX1 p. Asn122His, features replacement of an asparagine residue located in a highly conserved HxxxHxxN motif. Modelling the NOX1-p22phox complex revealed near the distal heme an internal pocket restricted by His119 and Asn122 that is part of the oxygen reduction site. Functional studies in several human NADPH oxidases show that substitution of asparagine with amino acids with larger side chains is not tolerated, while smaller side chains can support catalytic activity. Thus, we identified a previously unrecognized structural feature required for the electron transfer mechanism in human NADPH oxidases.
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Affiliation(s)
- Josie Ward
- School of Medicine, Conway Institute, University College Dublin, Dublin, Ireland
| | - Suisheng Zhang
- School of Medicine, Conway Institute, University College Dublin, Dublin, Ireland
| | - Adam Sikora
- Faculty of Chemistry, Institute of Applied Radiation Chemistry, Lodz University of Technology, Lodz, Poland
| | - Radoslaw Michalski
- Faculty of Chemistry, Institute of Applied Radiation Chemistry, Lodz University of Technology, Lodz, Poland
| | - Yuting Yin
- School of Medicine, Conway Institute, University College Dublin, Dublin, Ireland
| | - Aurora D'Alessio
- School of Medicine, Conway Institute, University College Dublin, Dublin, Ireland
| | - Rachel M McLoughlin
- Host-Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Vincent Jaquet
- Department of Pathology and Immunology and READS Unit, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Franck Fieschi
- Univ. Grenoble Alpes, CNRS, CEA, UMR5075, Institut de Biologie Structurale, Grenoble, France; Institut Universitaire de France (IUF), Paris, France.
| | - Ulla G Knaus
- School of Medicine, Conway Institute, University College Dublin, Dublin, Ireland.
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Hsu NY, Nayar S, Gettler K, Talware S, Giri M, Alter I, Argmann C, Sabic K, Thin TH, Ko HBM, Werner R, Tastad C, Stappenbeck T, Azabdaftari A, Uhlig HH, Chuang LS, Cho JH. NOX1 is essential for TNFα-induced intestinal epithelial ROS secretion and inhibits M cell signatures. Gut 2023; 72:654-662. [PMID: 36191961 PMCID: PMC9998338 DOI: 10.1136/gutjnl-2021-326305] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 08/20/2022] [Indexed: 12/08/2022]
Abstract
OBJECTIVE Loss-of-function mutations in genes generating reactive oxygen species (ROS), such as NOX1, are associated with IBD. Mechanisms whereby loss of ROS drive IBD are incompletely defined. DESIGN ROS measurements and single-cell transcriptomics were performed on colonoids stratified by NOX1 genotype and TNFα stimulation. Clustering of epithelial cells from human UC (inflamed and uninflamed) scRNASeq was performed. Validation of M cell induction was performed by immunohistochemistry using UEA1 (ulex europaeus agglutin-1 lectin) and in vivo with DSS injury. RESULTS TNFα induces ROS production more in NOX1-WT versus NOX1-deficient murine colonoids under a range of Wnt-mediated and Notch-mediated conditions. scRNASeq from inflamed and uninflamed human colitis versus TNFα stimulated, in vitro colonoids defines substantially shared, induced transcription factors; NOX1-deficient colonoids express substantially lower levels of STAT3 (signal transducer and activator of transcription 3), CEBPD (CCAAT enhancer-binding protein delta), DNMT1 (DNA methyltransferase) and HIF1A (hypoxia-inducible factor) baseline. Subclustering unexpectedly showed marked TNFα-mediated induction of M cells (sentinel cells overlying lymphoid aggregates) in NOX1-deficient colonoids. M cell induction by UEA1 staining is rescued with H2O2 and paraquat, defining extra- and intracellular ROS roles in maintenance of LGR5+ stem cells. DSS injury demonstrated GP2 (glycoprotein-2), basal lymphoplasmacytosis and UEA1 induction in NOX1-deficiency. Principal components analyses of M cell genes and decreased DNMT1 RNA velocity correlate with UC inflammation. CONCLUSIONS NOX1 deficiency plus TNFα stimulation contribute to colitis through dysregulation of the stem cell niche and altered cell differentiation, enhancing basal lymphoplasmacytosis. Our findings prioritise ROS modulation for future therapies.
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Affiliation(s)
- Nai-Yun Hsu
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Shikha Nayar
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Kyle Gettler
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Sayali Talware
- Division of Gastroenterology, Icahn School of Medicine at Mount Sinai Department of Medicine, New York, New York, USA.,The Icahn Genomic Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Mamta Giri
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Isaac Alter
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Carmen Argmann
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Ksenija Sabic
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Tin Htwe Thin
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Huai-Bin Mabel Ko
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, New York, USA
| | - Robert Werner
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Christopher Tastad
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Thaddeus Stappenbeck
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland, Ohio, USA
| | - Aline Azabdaftari
- Translational Gastroenterology Unit, University of Oxford, Oxford, UK
| | - Holm H Uhlig
- Translational Gastroenterology Unit, University of Oxford, Oxford, UK
| | - Ling-Shiang Chuang
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Judy H Cho
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA .,The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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5
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Dvornikova KA, Platonova ON, Bystrova EY. Hypoxia and Intestinal Inflammation: Common Molecular Mechanisms and Signaling Pathways. Int J Mol Sci 2023; 24. [PMID: 36768744 DOI: 10.3390/ijms24032425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/21/2023] [Accepted: 01/24/2023] [Indexed: 01/28/2023] Open
Abstract
The gastrointestinal tract (GI) has a unique oxygenation profile. It should be noted that the state of hypoxia can be characteristic of both normal and pathological conditions. Hypoxia-inducible factors (HIF) play a key role in mediating the response to hypoxia, and they are tightly regulated by a group of enzymes called HIF prolyl hydroxylases (PHD). In this review, we discuss the involvement of inflammation hypoxia and signaling pathways in the pathogenesis of inflammatory bowel disease (IBD) and elaborate in detail on the role of HIF in multiple immune reactions during intestinal inflammation. We emphasize the critical influence of tissue microenvironment and highlight the existence of overlapping functions and immune responses mediated by the same molecular mechanisms. Finally, we also provide an update on the development of corresponding therapeutic approaches that would be useful for treatment or prophylaxis of inflammatory bowel disease.
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Cohen-Kedar S, Shaham Barda E, Rabinowitz KM, Keizer D, Abu-Taha H, Schwartz S, Kaboub K, Baram L, Sadot E, White I, Wasserberg N, Wolff-Bar M, Levy-Barda A, Dotan I. Human intestinal epithelial cells can internalize luminal fungi via LC3-associated phagocytosis. Front Immunol 2023; 14:1142492. [PMID: 36969163 PMCID: PMC10030769 DOI: 10.3389/fimmu.2023.1142492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 02/22/2023] [Indexed: 03/29/2023] Open
Abstract
Background Intestinal epithelial cells (IECs) are the first to encounter luminal microorganisms and actively participate in intestinal immunity. We reported that IECs express the β-glucan receptor Dectin-1, and respond to commensal fungi and β-glucans. In phagocytes, Dectin-1 mediates LC3-associated phagocytosis (LAP) utilizing autophagy components to process extracellular cargo. Dectin-1 can mediate phagocytosis of β-glucan-containing particles by non-phagocytic cells. We aimed to determine whether human IECs phagocytose β-glucan-containing fungal particles via LAP. Methods Colonic (n=18) and ileal (n=4) organoids from individuals undergoing bowel resection were grown as monolayers. Fluorescent-dye conjugated zymosan (β-glucan particle), heat-killed- and UV inactivated C. albicans were applied to differentiated organoids and to human IEC lines. Confocal microscopy was used for live imaging and immuno-fluorescence. Quantification of phagocytosis was carried out with a fluorescence plate-reader. Results zymosan and C. albicans particles were phagocytosed by monolayers of human colonic and ileal organoids and IEC lines. LAP was identified by LC3 and Rubicon recruitment to phagosomes and lysosomal processing of internalized particles was demonstrated by co-localization with lysosomal dyes and LAMP2. Phagocytosis was significantly diminished by blockade of Dectin-1, actin polymerization and NAPDH oxidases. Conclusions Our results show that human IECs sense luminal fungal particles and internalize them via LAP. This novel mechanism of luminal sampling suggests that IECs may contribute to the maintenance of mucosal tolerance towards commensal fungi.
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Affiliation(s)
- Sarit Cohen-Kedar
- Division of Gastroenterology, Rabin Medical Center, Petah-Tikva, Israel
- Felsenstein Medical Research Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- *Correspondence: Iris Dotan, ; Sarit Cohen-Kedar,
| | - Efrat Shaham Barda
- Division of Gastroenterology, Rabin Medical Center, Petah-Tikva, Israel
- Felsenstein Medical Research Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Keren Masha Rabinowitz
- Division of Gastroenterology, Rabin Medical Center, Petah-Tikva, Israel
- Felsenstein Medical Research Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Danielle Keizer
- Division of Gastroenterology, Rabin Medical Center, Petah-Tikva, Israel
- Felsenstein Medical Research Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Hanan Abu-Taha
- Division of Gastroenterology, Rabin Medical Center, Petah-Tikva, Israel
- Felsenstein Medical Research Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Shoshana Schwartz
- Division of Gastroenterology, Rabin Medical Center, Petah-Tikva, Israel
- Felsenstein Medical Research Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Kawsar Kaboub
- Division of Gastroenterology, Rabin Medical Center, Petah-Tikva, Israel
- Felsenstein Medical Research Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Liran Baram
- Felsenstein Medical Research Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Eran Sadot
- Division of Surgery, Rabin Medical Center, Petah-Tikva, Israel
| | - Ian White
- Division of Surgery, Rabin Medical Center, Petah-Tikva, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Nir Wasserberg
- Division of Surgery, Rabin Medical Center, Petah-Tikva, Israel
| | - Meirav Wolff-Bar
- Department of Pathology, Rabin Medical Center, Petah-Tikva, Israel
| | | | - Iris Dotan
- Division of Gastroenterology, Rabin Medical Center, Petah-Tikva, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
- *Correspondence: Iris Dotan, ; Sarit Cohen-Kedar,
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7
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Liu Y, Liang S, Shi D, Zhang Y, Bai C, Ye RD. A predicted structure of NADPH Oxidase 1 identifies key components of ROS generation and strategies for inhibition. PLoS One 2023; 18:e0285206. [PMID: 37134122 PMCID: PMC10155968 DOI: 10.1371/journal.pone.0285206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 04/17/2023] [Indexed: 05/04/2023] Open
Abstract
NADPH oxidase 1 (NOX1) is primarily expressed in epithelial cells and responsible for local generation of reactive oxygen species (ROS). By specifically manipulating the local redox microenvironment, NOX1 actively engages in epithelial immunity, especially in colorectal and pulmonary epithelia. To unravel the structural basis of NOX1 engaged epithelial immune processes, a predicted structure model was established using RaptorX deep learning models. The predicted structure model illustrates a 6-transmembrane domain structure, a FAD binding domain, and an NADPH binding/NOXO1 interacting region. The substrate/cofactor binding scheme with respect to this proposed model highly correlates with published reports and is verified in our site-directed mutagenesis assays. An electron transport chain, from NADPH to FAD and the two heme groups, was well supported by the predicted model. Through molecular docking analysis of various small molecule NOX1 inhibitors and subsequent experimental validation, we identified pronounced active sites for potent NOX1 inhibition. Specifically, LEU60, VAL71, MET181, LEU185, HIS208, PHE211, TYR214, and TYR280 in the transmembrane domain form an active pocket for insertion of the small molecule inhibitors to inhibit electron transfer between the heme groups, thus affecting extracellular ROS generation. Altogether, our study provides structural information to help elucidate the role of NOX1 in epithelial generation of ROS and sheds light on the development of therapeutics for NOX1 related illnesses.
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Affiliation(s)
- Yezhou Liu
- Kobilka Institute of Innovative Drug Discovery, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong, China
- Shenzhen Bay Laboratory, Shenzhen, Guangdong, China
| | - Shiyu Liang
- Kobilka Institute of Innovative Drug Discovery, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong, China
| | - Danfeng Shi
- Warshel Institute of Computational Biology, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong, China
| | - Yue Zhang
- Warshel Institute of Computational Biology, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong, China
| | - Chen Bai
- Warshel Institute of Computational Biology, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong, China
| | - Richard D Ye
- Kobilka Institute of Innovative Drug Discovery, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong, China
- The Chinese University of Hong Kong, Shenzhen Futian Biomedical Innovation R&D Center, Shenzhen, China
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8
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Kofla-dłubacz A, Pytrus T, Akutko K, Sputa-grzegrzółka P, Piotrowska A, Dzięgiel P. Etiology of IBD—Is It Still a Mystery? Int J Mol Sci 2022; 23:12445. [PMID: 36293300 PMCID: PMC9604112 DOI: 10.3390/ijms232012445] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/04/2022] [Accepted: 10/14/2022] [Indexed: 11/17/2022] Open
Abstract
Inflammatory bowel diseases (IBD), including colitis ulcerosa and Crohn’s disease, are chronic diseases of the gastrointestinal tract for which the cause has not been fully understood. However, it is known that the etiology is multifactorial. The multidirectional network of interactions of environmental, microbiological and genetic factors in predisposed persons lead to an excessive and insufficiently inhibited reaction of the immune system, leading to the development of chronic inflammation of the gastrointestinal walls, the consequence of which is the loss of the function that the intestine performs, inter alia, through the process of fibrosis. Detailed knowledge of the pathways leading to chronic inflammation makes it possible to pharmacologically modulate disorders and effectively treatthese diseases. In this review, we described the primary and adaptive immune system response in the gut and the known immune pathogenetic pathways leading to the development of IBD. We also described the process leading to intestinal tissue fibrosis, which is an irreversible consequence of untreated IBD.
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9
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Herfindal AM, Rocha SDC, Papoutsis D, Bøhn SK, Carlsen H. The ROS-generating enzyme NADPH oxidase 1 modulates the colonic microbiota but offers minor protection against dextran sulfate sodium-induced low-grade colon inflammation in mice. Free Radic Biol Med 2022; 188:298-311. [PMID: 35752373 DOI: 10.1016/j.freeradbiomed.2022.06.234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/13/2022] [Accepted: 06/19/2022] [Indexed: 10/17/2022]
Abstract
The enzyme NADPH oxidase 1 (NOX1) is a major producer of superoxide which together with other reactive oxygen and nitrogen species (ROS/RNS) are implicated in maintaining a healthy epithelial barrier in the gut. While previous studies have indicated NOX1's involvement in microbial modulation in the small intestine, less is known about the effects of NOX1-dependent ROS/RNS formation in the colon. We investigated the role of NOX1 in the colon of NOX1 knockout (KO) and wild type (WT) mice, under mild and subclinical low-grade colon inflammation induced by 1% dextran sulfate sodium (DSS). Ex vivo imaging of ROS/RNS in the colon revealed that absence of NOX1 strongly decreased ROS/RNS production, particularly during DSS treatment. Furthermore, while absence of NOX1 did not affect disease activity, some markers of inflammation (mRNA: Tnfa, Il6, Ptgs2; protein: lipocalin 2) in the colonic mucosa tended to be higher in NOX1 KO than in WT mice following DSS treatment. Lack of NOX1 also extensively modulated the bacterial community in the colon (16S rRNA gene sequencing), where NOX1 KO mice were characterized mainly by lower α-diversity (richness and evenness), higher abundance of Firmicutes, Akkermansia, and Oscillibacter, and lower abundance of Bacteroidetes and Alistipes. Together, our data suggest that NOX1 is pivotal for colonic ROS/RNS production in mice both during steady-state (i.e., no DSS treatment) and during 1% DSS-induced low-grade inflammation and for modulation of the colonic microbiota, with potential beneficial consequences for intestinal health.
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Affiliation(s)
- Anne Mari Herfindal
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P. O. Box 5003, N-1432, Ås, Norway.
| | - Sérgio Domingos Cardoso Rocha
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P. O. Box 5003, N-1432, Ås, Norway; Faculty of Biosciences, Norwegian University of Life Sciences, P. O. Box 5003, N-1432, Ås, Norway.
| | - Dimitrios Papoutsis
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P. O. Box 5003, N-1432, Ås, Norway.
| | - Siv Kjølsrud Bøhn
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P. O. Box 5003, N-1432, Ås, Norway.
| | - Harald Carlsen
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P. O. Box 5003, N-1432, Ås, Norway.
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10
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Lucafò M, Muzzo A, Marcuzzi M, Giorio L, Decorti G, Stocco G. Patient-derived organoids for therapy personalization in inflammatory bowel diseases. World J Gastroenterol 2022; 28:2636-2653. [PMID: 35979165 PMCID: PMC9260862 DOI: 10.3748/wjg.v28.i24.2636] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/21/2022] [Accepted: 05/17/2022] [Indexed: 02/06/2023] Open
Abstract
Inflammatory bowel diseases (IBDs) are chronic inflammatory disorders of the intestinal tract that have emerged as a growing problem in industrialized countries. Knowledge of IBD pathogenesis is still incomplete, and the most widely-accepted interpretation considers genetic factors, environmental stimuli, uncontrolled immune responses and altered intestinal microbiota composition as determinants of IBD, leading to dysfunction of the intestinal epithelial functions. In vitro models commonly used to study the intestinal barrier do not fully reflect the proper intestinal architecture. An important innovation is represented by organoids, 3D in vitro cell structures derived from stem cells that can self-organize into functional organ-specific structures. Organoids may be generated from induced pluripotent stem cells or adult intestinal stem cells of IBD patients and therefore retain their genetic and transcriptomic profile. These models are powerful pharmacological tools to better understand IBD pathogenesis, to study the mechanisms of action on the epithelial barrier of drugs already used in the treatment of IBD, and to evaluate novel target-directed molecules which could improve therapeutic strategies. The aim of this review is to illustrate the potential use of organoids for therapy personalization by focusing on the most significant advances in IBD research achieved through the use of adult stem cells-derived intestinal organoids.
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Affiliation(s)
- Marianna Lucafò
- Advanced Translational Diagnostics Laboratory, Institute for Maternal and Child Health-IRCCS “Burlo Garofolo”, Trieste 34137, Italy
| | - Antonella Muzzo
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste 34127, Italy
| | - Martina Marcuzzi
- Department of Life Sciences, University of Trieste, Trieste 34127, Italy
| | - Lorenzo Giorio
- Department of Life Sciences, University of Trieste, Trieste 34127, Italy
| | - Giuliana Decorti
- Advanced Translational Diagnostics Laboratory, Institute for Maternal and Child Health-IRCCS “Burlo Garofolo”, Trieste 34137, Italy
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste 34127, Italy
| | - Gabriele Stocco
- Advanced Translational Diagnostics Laboratory, Institute for Maternal and Child Health-IRCCS “Burlo Garofolo”, Trieste 34137, Italy
- Department of Life Sciences, University of Trieste, Trieste 34127, Italy
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11
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Abraham C, Abreu MT, Turner JR. Pattern Recognition Receptor Signaling and Cytokine Networks in Microbial Defenses and Regulation of Intestinal Barriers: Implications for Inflammatory Bowel Disease. Gastroenterology 2022; 162:1602-1616.e6. [PMID: 35149024 PMCID: PMC9112237 DOI: 10.1053/j.gastro.2021.12.288] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 11/30/2021] [Accepted: 12/10/2021] [Indexed: 12/23/2022]
Abstract
Inflammatory bowel disease is characterized by defects in epithelial function and dysregulated inflammatory signaling by lamina propria mononuclear cells including macrophages and dendritic cells in response to microbiota. In this review, we focus on the role of pattern recognition receptors in the inflammatory response as well as epithelial barrier regulation. We explore cytokine networks that increase inflammation, regulate paracellular permeability, cause epithelial damage, up-regulate epithelial proliferation, and trigger restitutive processes. We focus on studies using patient samples as well as speculate on pathways that can be targeted to more holistically treat patients with inflammatory bowel disease.
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Affiliation(s)
- Clara Abraham
- Department of Internal Medicine, Yale University, New Haven, Connecticut.
| | - Maria T. Abreu
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Miami Leonard Miller School of Medicine, Miami, FL
| | - Jerrold R. Turner
- Laboratory of Mucosal Barrier Pathobiology, Department of Pathology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA
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12
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Abstract
Intestinal epithelium represents a dynamic and diverse cellular system that continuously interacts with gut commensals and external cues. Intestinal stem cells, which lie at the heart of epithelial renewal and turnover, proliferate to maintain a steady stem cell population and differentiate to form functional epithelial cell types. This rather sophisticated assembly-line is maintained by an elaborate micro-environment, sculpted by a myriad of host and gut microbiota-derived signals, forming an intestinal stem cell niche. This complex, yet crucial signaling niche undergoes dynamic changes during homeostasis and chronic intestinal inflammation. Inflammatory bowel disease refers to a chronic inflammatory response toward pathogenic or commensal microbiota, in a genetically susceptible host. Compositional and functional alterations in gut microbiota are pathognomonic of IBD.The present review highlights the modulatory role of gut microbiota on the intestinal stem cell niche during homeostasis and inflammatory bowel disease. We discuss the mechanisms of direct action of gut commensals (through microbiota-derived or microbiota-influenced metabolites) on ISCs, followed by their effects via other epithelial and immune cell types.
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Affiliation(s)
- Manasvini Markandey
- Department of Gastroenterology and Human Nutrition, All India Institute of Medical Sciences, New Delhi, India
| | - Aditya Bajaj
- Department of Gastroenterology and Human Nutrition, All India Institute of Medical Sciences, New Delhi, India
| | | | - Saurabh Kedia
- Department of Gastroenterology and Human Nutrition, All India Institute of Medical Sciences, New Delhi, India
| | - Simon Travis
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Fiona Powrie
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Vineet Ahuja
- Department of Gastroenterology and Human Nutrition, All India Institute of Medical Sciences, New Delhi, India,CONTACT Vineet Ahuja Department of Gastroenterology and Human Nutrition, All India Institute of Medical Sciences, New Delhi, India, 110029
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13
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Huang J, Lin B, Zhang Y, Xie Z, Zheng Y, Wang Q, Xiao H. Bamboo shavings derived O-acetylated xylan alleviates loperamide-induced constipation in mice. Carbohydr Polym 2022; 276:118761. [PMID: 34823784 DOI: 10.1016/j.carbpol.2021.118761] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 09/15/2021] [Accepted: 10/10/2021] [Indexed: 12/22/2022]
Abstract
BSH-1 is an O-acetylated xylan obtained from bamboo shavings. This study determined the protective effects of BSH-1 against loperamide (Lop)-induced constipation in mice. Mice received BSH-1 by gavage daily for 14 days. In constipated mice, BSH-1 significantly shortened the defecation time and raised the gastrointestinal (GI) transit rate, stool production, and cecal concentration of short-chain fatty acids (SCFAs). BSH-1 regulated the serum levels of gut hormones and neurotransmitters. BSH-1 also significantly altered the cecal microbiota of the constipated mice by increasing the abundance of potentially beneficial bacteria (e.g., Lactobacillus, Roseburia, and Bacteroidales_S24-7) and decreasing potentially pathogenic bacteria (e.g., Alloprevotella and Staphylococcus). Furthermore, colonic transcriptome analysis revealed that BSH-1 significantly reversed the expression changes of genes related to intestinal motility, water and ion transport, inflammation and cancer in constipated mice. Our findings indicated that BSH-1 effectively relieved Lop-induced constipation in mice and could be potentially used for constipation treatment.
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Affiliation(s)
- Juqing Huang
- Institute of Agricultural Engineering, Fujian Academy of Agricultural Sciences, Fuzhou 350003, PR China; Department of Food Science, University of Massachusetts Amherst, Amherst, USA
| | - Bin Lin
- Institute of Agricultural Engineering, Fujian Academy of Agricultural Sciences, Fuzhou 350003, PR China
| | - Ying Zhang
- Department of Food Science and Nutrition, School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, PR China
| | - Zhenglu Xie
- Jinshan College of Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Yi Zheng
- Institute of Agricultural Engineering, Fujian Academy of Agricultural Sciences, Fuzhou 350003, PR China
| | - Qi Wang
- Department of Food Science, University of Massachusetts Amherst, Amherst, USA
| | - Hang Xiao
- Department of Food Science, University of Massachusetts Amherst, Amherst, USA.
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14
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Liu JB, Li ZF, Lu L, Wang ZY, Wang L. Glyphosate damages blood-testis barrier via NOX1-triggered oxidative stress in rats: Long-term exposure as a potential risk for male reproductive health. Environ Int 2022; 159:107038. [PMID: 34906888 DOI: 10.1016/j.envint.2021.107038] [Citation(s) in RCA: 84] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 11/11/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
Blood-testis barrier (BTB) creates a privileged niche indispensable for spermatogenesis. Glyphosate (GLY), the most commonly used herbicide worldwide, has been reported to decrease sperm quality. However, whether and how GLY destroys the BTB to affect sperm quality remains to be elucidated. Herein, this study was designed to investigate the influence of GLY on the BTB in vivo and in vitro experiments. The results showed that male rats exposed to GLY for 4 months exhibited a decrease in sperm quality and quantity, accompanied by BTB integrity disruption and testicular oxidative stress. Additionally, GLY-induced reactive oxygen species (ROS) contributed to the downregulation of BTB-related proteins in primary Sertoli cells (SCs). Intriguingly, we identified a marked upregulation of oxidative stress-related gene NOX1 in GLY-exposed testis based on transcriptome analysis. NOX1 knockdown blocked the GLY-induced oxidative stress, as well as prevented BTB-related protein decrease in SCs. Furthermore, the estrogen receptor (ER)-α was significantly upregulated in vivo and in vitro models. An ER-α inhibitor decreased the expression levels of both ER-α and NOX1. Mechanistically, GLY directly interacted with ER-α at the site of Pro39 and Lys401 to promote ER-α activation, which boosted NOX1 expression to trigger ROS accumulation. Collectively, these results demonstrate that long-term GLY exposure adversely affects BTB integrity, which disrupts spermatogenesis via activation of ER-α/NOX1 axis. This study presents a better understanding of the risk of long-term GLY exposure to male fertility.
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Affiliation(s)
- Jing-Bo Liu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China
| | - Zi-Fa Li
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan City 250355, Shandong Province, China
| | - Lu Lu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China
| | - Zhen-Yong Wang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China
| | - Lin Wang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China.
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15
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Liu Y, Freeborn J, Armbrister SA, Tran DQ, Rhoads JM. Treg-associated monogenic autoimmune disorders and gut microbial dysbiosis. Pediatr Res 2022; 91:35-43. [PMID: 33731809 DOI: 10.1038/s41390-021-01445-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/24/2020] [Accepted: 12/05/2020] [Indexed: 01/31/2023]
Abstract
Primary immunodeficiency diseases (PIDs) caused by a single-gene defect generally are referred to as monogenic autoimmune disorders. For example, mutations in the transcription factor autoimmune regulator (AIRE) result in a condition called autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy; while mutations in forkhead box P3 lead to regulatory T cell (Treg)-deficiency-induced multiorgan inflammation, which in humans is called "immune dysregulation, polyendocrinopathy, enteropathy with X-linked inheritance" (or IPEX syndrome). Previous studies concluded that monogenic diseases are insensitive to commensal microbial regulation because they develop even in germ-free (GF) animals, a conclusion that has limited the number of studies determining the role of microbiota in monogenic PIDs. However, emerging evidence shows that although the onset of the disease is independent of the microbiota, several monogenic PIDs vary in severity in association with the microbiome. In this review, we focus on monogenic PIDs associated with Treg deficiency/dysfunction, summarizing the gut microbial dysbiosis that has been shown to be linked to these diseases. From limited studies, we have gleaned several mechanistic insights that may prove to be of therapeutic importance in the early stages of life. IMPACT: This review paper serves to refute the concept that monogenic PIDs are not linked to the microbiome. The onset of monogenic PIDs is independent of microbiota; single-gene mutations such as AIRE or Foxp3 that affect central or peripheral immune tolerance produce monogenic diseases even in a GF environment. However, the severity and outcome of PIDs are markedly impacted by the microbial composition. We suggest that future research for these conditions may focus on targeting the microbiome.
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16
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Charbit-Henrion F, Parlato M, Malamut G, Ruemmele F, Cerf-Bensussan N. Intestinal immunoregulation: lessons from human mendelian diseases. Mucosal Immunol 2021; 14:1017-37. [PMID: 33859369 DOI: 10.1038/s41385-021-00398-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 02/04/2023]
Abstract
The mechanisms that maintain intestinal homeostasis despite constant exposure of the gut surface to multiple environmental antigens and to billions of microbes have been scrutinized over the past 20 years with the goals to gain basic knowledge, but also to elucidate the pathogenesis of inflammatory bowel diseases (IBD) and to identify therapeutic targets for these severe diseases. Considerable insight has been obtained from studies based on gene inactivation in mice as well as from genome wide screens for genetic variants predisposing to human IBD. These studies are, however, not sufficient to delineate which pathways play key nonredundant role in the human intestinal barrier and to hierarchize their respective contribution. Here, we intend to illustrate how such insight can be derived from the study of human Mendelian diseases, in which severe intestinal pathology results from single gene defects that impair epithelial and or hematopoietic immune cell functions. We suggest that these diseases offer the unique opportunity to study in depth the pathogenic mechanisms leading to perturbation of intestinal homeostasis in humans. Furthermore, molecular dissection of monogenic intestinal diseases highlights key pathways that might be druggable and therapeutically targeted in common forms of IBD.
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17
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Cananzi M, Wohler E, Marzollo A, Colavito D, You J, Jing H, Bresolin S, Gaio P, Martin R, Mescoli C, Bade S, Posey JE, Dalle Carbonare M, Tung W, Jhangiani SN, Bosa L, Zhang Y, Filho JS, Gabelli M, Kellermayer R, Kader HA, Oliva-Hemker M, Perilongo G, Lupski JR, Biffi A, Valle D, Leon A, de Macena Sobreira NL, Su HC, Guerrerio AL. IFIH1 loss-of-function variants contribute to very early-onset inflammatory bowel disease. Hum Genet 2021; 140:1299-1312. [PMID: 34185153 PMCID: PMC8423350 DOI: 10.1007/s00439-021-02300-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 06/07/2021] [Indexed: 02/06/2023]
Abstract
Genetic defects of innate immunity impairing intestinal bacterial sensing are linked to the development of Inflammatory Bowel Disease (IBD). Although much evidence supports a role of the intestinal virome in gut homeostasis, most studies focus on intestinal viral composition rather than on host intestinal viral sensitivity. To demonstrate the association between the development of Very Early Onset IBD (VEOIBD) and variants in the IFIH1 gene which encodes MDA5, a key cytosolic sensor for viral nucleic acids. Whole exome sequencing (WES) was performed in two independent cohorts of children with VEOIBD enrolled in Italy (n = 18) and USA (n = 24). Luciferase reporter assays were employed to assess MDA5 activity. An enrichment analysis was performed on IFIH1 comparing 42 VEOIBD probands with 1527 unrelated individuals without gastrointestinal or immunological issues. We identified rare, likely loss-of-function (LoF), IFIH1 variants in eight patients with VEOIBD from a combined cohort of 42 children. One subject, carrying a homozygous truncating variant resulting in complete LoF, experienced neonatal-onset, pan-gastrointestinal, IBD-like enteropathy plus multiple infectious episodes. The remaining seven subjects, affected by VEOIBD without immunodeficiency, were carriers of one LoF variant in IFIH1. Among these, two patients also carried a second hypomorphic variant, with partial function apparent when MDA5 was weakly stimulated. Furthermore, IFIH1 variants were significantly enriched in children with VEOIBD as compared to controls (p = 0.007). Complete and partial MDA5 deficiency is associated with VEOIBD with variable penetrance and expressivity, suggesting a role for impaired intestinal viral sensing in IBD pathogenesis.
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Affiliation(s)
- Mara Cananzi
- Unit of Pediatric Gastroenterology, Digestive Endoscopy, Hepatology and Care of the Child with Liver Transplantation, Department of Women's and Children's Health, University Hospital of Padova, Padova, Italy.
| | - Elizabeth Wohler
- McKusick-Nathans Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, USA
| | - Antonio Marzollo
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Department of Women's and Children's Health, University Hospital of Padova, Padova, Italy
- Istituto di Ricerca Pediatrica, Fondazione Città della Speranza, Padova, Italy
| | - Davide Colavito
- Research & Innovation (R&I Genetics) Srl, C.so Stati Uniti 4, Padova, Italy
| | - Jing You
- McKusick-Nathans Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, USA
| | - Huie Jing
- Human Immunological Diseases Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Silvia Bresolin
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Department of Women's and Children's Health, University Hospital of Padova, Padova, Italy
- Istituto di Ricerca Pediatrica, Fondazione Città della Speranza, Padova, Italy
| | - Paola Gaio
- Unit of Pediatric Gastroenterology, Digestive Endoscopy, Hepatology and Care of the Child with Liver Transplantation, Department of Women's and Children's Health, University Hospital of Padova, Padova, Italy
| | - Renan Martin
- McKusick-Nathans Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, USA
| | - Claudia Mescoli
- Surgical Pathology and Cytopathology Unit, Department of Medicine (DIMED), University Hospital of Padova, Padova, Italy
| | - Sangeeta Bade
- Human Immunological Diseases Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Jennifer E Posey
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | | | - Wesley Tung
- Human Immunological Diseases Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Shalini N Jhangiani
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA
| | - Luca Bosa
- Unit of Pediatric Gastroenterology, Digestive Endoscopy, Hepatology and Care of the Child with Liver Transplantation, Department of Women's and Children's Health, University Hospital of Padova, Padova, Italy
| | - Yu Zhang
- Human Immunological Diseases Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Joselito Sobreira Filho
- Division of Genetics, Department of Morphology and Genetics, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | - Maria Gabelli
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Department of Women's and Children's Health, University Hospital of Padova, Padova, Italy
| | - Richard Kellermayer
- Section of Pediatric Gastroenterology, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, USA
| | - Howard A Kader
- Department of Pediatrics, Division of Pediatric Gastroenterology & Nutrition, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Maria Oliva-Hemker
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Giorgio Perilongo
- Unit of Pediatric Gastroenterology, Digestive Endoscopy, Hepatology and Care of the Child with Liver Transplantation, Department of Women's and Children's Health, University Hospital of Padova, Padova, Italy
| | - James R Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
- Texas Children's Hospital, Houston, Texas, USA
| | - Alessandra Biffi
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Department of Women's and Children's Health, University Hospital of Padova, Padova, Italy
| | - David Valle
- McKusick-Nathans Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, USA
| | - Alberta Leon
- Research & Innovation (R&I Genetics) Srl, C.so Stati Uniti 4, Padova, Italy
| | | | - Helen C Su
- Human Immunological Diseases Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Anthony L Guerrerio
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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18
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Miller BM, Liou MJ, Lee JY, Bäumler AJ. The longitudinal and cross-sectional heterogeneity of the intestinal microbiota. Curr Opin Microbiol 2021; 63:221-30. [PMID: 34428628 DOI: 10.1016/j.mib.2021.08.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 08/04/2021] [Indexed: 02/07/2023]
Abstract
A central goal of microbiome research is to understand the factors that balance gut-associated microbial communities, thereby creating longitudinal and cross-sectional heterogeneity in their composition and density. Whereas the diet dictates taxa dominance, microbial communities are linked intimately to host physiology through digestive and absorptive functions that generate longitudinal heterogeneity in nutrient availability. Additionally, the host differentially controls the access to electron acceptors along the longitudinal axis of the intestine to drive the development of microbial communities that are dominated by facultatively anaerobic bacteria in the small intestine or obligately anaerobic bacteria in the large intestine. By secreting mucus and antimicrobials, the host further constructs microhabitats that generate cross-sectional heterogeneity in the colonic microbiota composition. Here we will review how understanding the host factors involved in generating longitudinal and cross-sectional microbiota heterogeneity helps define physiological states that are characteristic of or appropriate to a homeostatic microbiome.
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19
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Kudo T, Fujii T, Maisawa SI, Sasaki M, Uchida K, Ida S, Kagimoto S, Yoden A, Shimizu T. A Multicenter Prospective Survey on Early-Onset Inflammatory Bowel Disease in Japan. Digestion 2021; 102:368-376. [PMID: 32422640 DOI: 10.1159/000507570] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 03/29/2020] [Indexed: 02/04/2023]
Abstract
INTRODUCTION The incidence of early-onset inflammatory bowel disease is increasing in Japan. OBJECTIVE This study aimed to analyze the treatment and progress of early-onset inflammatory bowel disease. METHODS This prospective survey evaluated the data of 43 patients aged <8 years who were diagnosed with inflammatory bowel disease (IBD) from the time of diagnosis to 36 months after registration. RESULTS A total of 12 patients with Crohn's disease (CD), 21 with ulcerative colitis (UC), and 3 with unclassified IBD were enrolled. The mean disease onset age was 3 years and 7 months. Colon and anal lesions were present in 100 and 50% of patients with CD, respectively. Granulomas were detected in 5 patients (41.7%). Dietary elimination including elemental diet was performed in all patients. Eleven patients (91.7%) were in remission by initial induction therapy, and 72.7% maintained remission for 36 months. Three patients (14.3%) with UC had familial history, 71.4% had pancolitis-type UC, and 66.7% exhibited disease of moderate severity. Colectomy was performed in 4 patients (21.1%). Eighteen patients (85.7%) were in remission by initial induction therapy; however, only 15.8% maintained remission for 36 months. Anal complication was more prevalent in infantile-onset IBD than in childhood-onset IBD (p = 0.014). CONCLUSIONS Among Japanese patients aged <8 years who were diagnosed with IBD, colitis-type disease was more common in CD and pancolitis was more common in UC. As the courses of several patients were severe, identifying primary immunodeficiency appears to be necessary to confirm background disease.
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Affiliation(s)
- Takahiro Kudo
- Department of Pediatrics, Juntendo University Faculty of Medicine, Tokyo, Japan,
| | - Tohru Fujii
- Department of Pediatrics, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Shun-Ichi Maisawa
- Department of Pediatrics, Morioka Children's Hospital, Iwate, Japan.,Pediatric IBD Epidemiological Survey Working Group, Japanese Society for Pediatric Inflammatory Bowel Disease, Tokyo, Japan
| | - Mika Sasaki
- Department of Pediatrics, Morioka Medical Center, Iwate, Japan.,Pediatric IBD Epidemiological Survey Working Group, Japanese Society for Pediatric Inflammatory Bowel Disease, Tokyo, Japan
| | - Keiichi Uchida
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Mie, Japan.,Pediatric IBD Epidemiological Survey Working Group, Japanese Society for Pediatric Inflammatory Bowel Disease, Tokyo, Japan
| | - Shinobu Ida
- Department of Pediatric Gastroenterology and Nutrition, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan.,Pediatric IBD Epidemiological Survey Working Group, Japanese Society for Pediatric Inflammatory Bowel Disease, Tokyo, Japan
| | - Seiichi Kagimoto
- Department of General Physician, Saitama Prefectural Children's Hospital, Saitama, Japan.,Pediatric IBD Epidemiological Survey Working Group, Japanese Society for Pediatric Inflammatory Bowel Disease, Tokyo, Japan
| | - Atsushi Yoden
- Department of Pediatrics, Osaka Medical College, Osaka, Japan.,Pediatric IBD Epidemiological Survey Working Group, Japanese Society for Pediatric Inflammatory Bowel Disease, Tokyo, Japan
| | - Toshiaki Shimizu
- Department of Pediatrics, Juntendo University Faculty of Medicine, Tokyo, Japan.,Pediatric IBD Epidemiological Survey Working Group, Japanese Society for Pediatric Inflammatory Bowel Disease, Tokyo, Japan
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20
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Miller BM, Liou MJ, Zhang LF, Nguyen H, Litvak Y, Schorr EM, Jang KK, Tiffany CR, Butler BP, Bäumler AJ. Anaerobic Respiration of NOX1-Derived Hydrogen Peroxide Licenses Bacterial Growth at the Colonic Surface. Cell Host Microbe 2021; 28:789-797.e5. [PMID: 33301718 DOI: 10.1016/j.chom.2020.10.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 09/14/2020] [Accepted: 10/26/2020] [Indexed: 12/15/2022]
Abstract
The colonic microbiota exhibits cross-sectional heterogeneity, but the mechanisms that govern its spatial organization remain incompletely understood. Here we used Citrobacter rodentium, a pathogen that colonizes the colonic surface, to identify microbial traits that license growth and survival in this spatial niche. Previous work showed that during colonic crypt hyperplasia, type III secretion system (T3SS)-mediated intimate epithelial attachment provides C. rodentium with oxygen for aerobic respiration. However, we find that prior to the development of colonic crypt hyperplasia, T3SS-mediated intimate attachment is not required for aerobic respiration but for hydrogen peroxide (H2O2) respiration using cytochrome c peroxidase (Ccp). The epithelial NADPH oxidase NOX1 is the primary source of luminal H2O2 early after C. rodentium infection and is required for Ccp-dependent growth. Our results suggest that NOX1-derived H2O2 is a resource that governs bacterial growth and survival in close proximity to the mucosal surface during gut homeostasis.
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Affiliation(s)
- Brittany M Miller
- Department of Medical Microbiology and Immunology, School of Medicine, University of California at Davis, One Shields Ave, Davis, CA 95616, USA
| | - Megan J Liou
- Department of Medical Microbiology and Immunology, School of Medicine, University of California at Davis, One Shields Ave, Davis, CA 95616, USA
| | - Lillian F Zhang
- Department of Medical Microbiology and Immunology, School of Medicine, University of California at Davis, One Shields Ave, Davis, CA 95616, USA
| | - Henry Nguyen
- Department of Medical Microbiology and Immunology, School of Medicine, University of California at Davis, One Shields Ave, Davis, CA 95616, USA
| | - Yael Litvak
- Department of Medical Microbiology and Immunology, School of Medicine, University of California at Davis, One Shields Ave, Davis, CA 95616, USA; Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus Givat-Ram, Jerusalem 9190401, Israel
| | - Eva-Magdalena Schorr
- Department of Medical Microbiology and Immunology, School of Medicine, University of California at Davis, One Shields Ave, Davis, CA 95616, USA
| | - Kyung Ku Jang
- Department of Medical Microbiology and Immunology, School of Medicine, University of California at Davis, One Shields Ave, Davis, CA 95616, USA; Present address: Department of Microbiology, New York University School of Medicine, New York, NY 10016, USA
| | - Connor R Tiffany
- Department of Medical Microbiology and Immunology, School of Medicine, University of California at Davis, One Shields Ave, Davis, CA 95616, USA
| | - Brian P Butler
- Department of Pathobiology, School of Veterinary Medicine, St. George's University, Grenada, West Indies
| | - Andreas J Bäumler
- Department of Medical Microbiology and Immunology, School of Medicine, University of California at Davis, One Shields Ave, Davis, CA 95616, USA.
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21
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Abstract
Redox medicine is a new therapeutic concept targeting reactive oxygen species (ROS) and secondary reaction products for health benefit. The concomitant function of ROS as intracellular second messengers and extracellular mediators governing physiological redox signaling, and as damaging radicals instigating or perpetuating various pathophysiological conditions will require selective strategies for therapeutic intervention. In addition, the reactivity and quantity of the oxidant species generated, its source and cellular location in a defined disease context need to be considered to achieve the desired outcome. In inflammatory diseases associated with oxidative damage and tissue injury, ROS source specific inhibitors may provide more benefit than generalized removal of ROS. Contemporary approaches in immunity will also include the preservation or even elevation of certain oxygen metabolites to restore or improve ROS driven physiological functions including more effective redox signaling and cell-microenvironment communication, and to induce mucosal barrier integrity, eubiosis and repair processes. Increasing oxidants by host-directed immunomodulation or by exogenous supplementation seems especially promising for improving host defense. Here, we summarize examples of beneficial ROS in immune homeostasis, infection, and acute inflammatory disease, and address emerging therapeutic strategies for ROS augmentation to induce and strengthen protective host immunity.
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Affiliation(s)
- Alexia Dumas
- Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland
| | - Ulla G Knaus
- Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland
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22
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van der Post S, Birchenough GMH, Held JM. NOX1-dependent redox signaling potentiates colonic stem cell proliferation to adapt to the intestinal microbiota by linking EGFR and TLR activation. Cell Rep 2021; 35:108949. [PMID: 33826887 PMCID: PMC10327654 DOI: 10.1016/j.celrep.2021.108949] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 01/25/2021] [Accepted: 03/15/2021] [Indexed: 02/07/2023] Open
Abstract
The colon epithelium is a primary point of interaction with the microbiome and is regenerated by a few rapidly cycling colonic stem cells (CSCs). CSC self-renewal and proliferation are regulated by growth factors and the presence of bacteria. However, the molecular link connecting the diverse inputs that maintain CSC homeostasis remains largely unknown. We report that CSC proliferation is mediated by redox-dependent activation of epidermal growth factor receptor (EGFR) signaling via NADPH oxidase 1 (NOX1). NOX1 expression is CSC specific and is restricted to proliferative CSCs. In the absence of NOX1, CSCs fail to generate ROS and have a reduced proliferation rate. NOX1 expression is regulated by Toll-like receptor activation in response to the microbiota and serves to link CSC proliferation with the presence of bacterial components in the crypt. The TLR-NOX1-EGFR axis is therefore a critical redox signaling node in CSCs facilitating the quiescent-proliferation transition and responds to the microbiome to maintain colon homeostasis.
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Affiliation(s)
- Sjoerd van der Post
- Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; Department of Medical Biochemistry, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - George M H Birchenough
- Department of Medical Biochemistry, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Jason M Held
- Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; Siteman Cancer Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA.
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23
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Lee H, Lee JS, Cho HJ, Lee YJ, Kim ES, Kim SK, Nam TG, Jeong BS, Kim JA. Antioxidant Analogue 6-Amino-2,4,5-Trimethylpyridin-3-ol Ameliorates Experimental Colitis in Mice. Dig Dis Sci 2021; 66:1022-1033. [PMID: 32361923 DOI: 10.1007/s10620-020-06267-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 04/10/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Oxidative stress has been suggested to be a factor contributing to the disease severity of inflammatory bowel disease (IBD). BJ-1108, a derivative of 6-amino-2,4,5-trimethylpyridin-3-ol, is reported to significantly inhibit the generation of reactive oxygen species (ROS) in vitro. However, whether this molecule affects intestinal inflammation is largely unknown. We aimed to investigate the effect of BJ-1108 on dextran sulfate sodium (DSS)-induced experimental colitis in mice. METHODS Colitis was induced in mice with DSS, and disease severity was estimated by evaluating body weight, colon length, histology, immune cell infiltration, and intestinal permeability. We examined the protective effects of BJ-1108 on barrier function using Caco-2 cells. Last, we estimated the impact of BJ-1108 on the phosphorylation of NF-kB, PI3K/AKT, and mitogen-activated protein kinases. RESULTS Mice treated with BJ-1108 exhibited improved disease severity, as indicated by evaluations of body weight, histological scores, spleen weight, and infiltrates of T cells and macrophages. The administration of BJ-1108 inhibited the colonic mRNA expression of IL-6 and IL-1β in vivo. Additionally, BJ-1108 limited intestinal permeability and enhanced the expression of tight junction (TJ) proteins such as claudin-1 and claudin-3 in the DSS-induced colitis model. In an in vitro model using Caco-2 cells, BJ-1108 ameliorated cytokine-induced ROS generation in a dose-dependent manner and remarkably recovered barrier dysfunction as estimated by evaluating transepithelial electrical resistance and TJ protein expression. BJ-1108 suppressed the NF-kB/ERK/PI3K pathway. CONCLUSIONS This study demonstrated that BJ-1108 ameliorated intestinal inflammation in an experimental colitis mouse model, suggesting possible therapeutic implications for IBD.
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Affiliation(s)
- Hoyul Lee
- Leading-Edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Hospital, Daegu, South Korea.,Bio-Medical Research Institute, Kyungpook National University Hospital, Daegu, South Korea
| | - Joon Seop Lee
- Division of Gastroenterology, Department of Internal Medicine, Kyungpook National University Hospital, Daegu, South Korea
| | - Hyun Jung Cho
- Division of Gastroenterology, Department of Internal Medicine, Kyungpook National University Hospital, Daegu, South Korea
| | - Yu-Jeong Lee
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, South Korea
| | - Eun Soo Kim
- Division of Gastroenterology, Department of Internal Medicine, Kyungpook National University Hospital, Daegu, South Korea. .,Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, South Korea.
| | - Sung Kook Kim
- Division of Gastroenterology, Department of Internal Medicine, Kyungpook National University Hospital, Daegu, South Korea.,Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, South Korea
| | - Tae-Gyu Nam
- College of Pharmacy, Hanyang University, Ansan, South Korea
| | | | - Jung-Ae Kim
- College of Pharmacy, Yeungnam University, Gyeongsan, South Korea
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24
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Chen E, Chuang LS, Giri M, Villaverde N, Hsu NY, Sabic K, Joshowitz S, Gettler K, Nayar S, Chai Z, Alter IL, Chasteau CC, Korie UM, Dzedzik S, Thin TH, Jain A, Moscati A, Bongers G, Duerr RH, Silverberg MS, Brant SR, Rioux JD, Peter I, Schumm LP, Haritunians T, McGovern DP, Itan Y, Cho JH. Inflamed Ulcerative Colitis Regions Associated With MRGPRX2-Mediated Mast Cell Degranulation and Cell Activation Modules, Defining a New Therapeutic Target. Gastroenterology 2021; 160:1709-1724. [PMID: 33421512 PMCID: PMC8494017 DOI: 10.1053/j.gastro.2020.12.076] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 12/22/2020] [Accepted: 12/30/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND & AIMS Recent literature has implicated a key role for mast cells in murine models of colonic inflammation, but their role in human ulcerative colitis (UC) is not well established. A major advance has been the identification of mrgprb2 (human orthologue, MRGPX2) as mediating IgE-independent mast cell activation. We sought to define mechanisms of mast cell activation and MRGPRX2 in human UC. METHODS Colon tissues were collected from patients with UC for bulk RNA sequencing and lamina propria cells were isolated for MRGPRX2 activation studies and single-cell RNA sequencing. Genetic association of all protein-altering G-protein coupled receptor single-nucleotide polymorphism was performed in an Ashkenazi Jewish UC case-control cohort. Variants of MRGPRX2 were transfected into Chinese hamster ovary (CHO) and human mast cell (HMC) 1.1 cells to detect genotype-dependent effects on β-arrestin recruitment, IP-1 accumulation, and phosphorylated extracellular signal-regulated kinase. RESULTS Mast cell-specific mediators and adrenomedullin (proteolytic precursor of PAMP-12, an MRGPRX2 agonist) are up-regulated in inflamed compared to uninflamed UC. MRGPRX2 stimulation induces carboxypeptidase secretion from inflamed UC. Of all protein-altering GPCR alleles, a unique variant of MRGPRX2, Asn62Ser, was most associated with and was bioinformatically predicted to alter arrestin recruitment. We validated that the UC protective serine allele enhances β-arrestin recruitment, decreases IP-1, and increases phosphorylated extracellular signal-regulated kinase with MRGPRX2 agonists. Single-cell RNA sequencing defines that adrenomedullin is expressed by activated fibroblasts and epithelial cells and that interferon gamma is a key upstream regulator of mast cell gene expression. CONCLUSION Inflamed UC regions are distinguished by MRGPRX2-mediated activation of mast cells, with decreased activation observed with a UC-protective genetic variant. These results define cell modules of UC activation and a new therapeutic target.
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Affiliation(s)
- Ernie Chen
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Ling-shiang Chuang
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Mamta Giri
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Nicole Villaverde
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Nai-yun Hsu
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Ksenija Sabic
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Sari Joshowitz
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Kyle Gettler
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Shikha Nayar
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Zhi Chai
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Isaac L. Alter
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Colleen C. Chasteau
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Ujunwa M. Korie
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Siarhei Dzedzik
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Tin Htwe Thin
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Aayushee Jain
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Arden Moscati
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Gerardus Bongers
- Precision Immunology Institute at the Icahn School of Medicine at Mount Sinai, New York
| | - Richard H. Duerr
- Division of Gastroenterology, Hepatology and Nutrition, University of Pittsburgh, Pittsburgh, PA, United States
| | - Mark S. Silverberg
- Zane Cohen Centre for Digestive Diseases, Division of Gastroenterology, Mount Sinai Hospital, University of Toronto, Ontario, Canada, Toronto, Ontario, Canada
| | - Steven R. Brant
- Crohns and Colitis Center of New Jersey, Division of Gastroenterology and Hepatology, Department of Medicine, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, United States
| | - John D. Rioux
- Research Centre, Montreal Heart Institute, Montréal, QC, Canada. Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Inga Peter
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - L. Philip Schumm
- Department of Health Sciences, University of Chicago, Chicago, Illinois, United States
| | - Talin Haritunians
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States
| | - Dermot P. McGovern
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States
| | - Yuval Itan
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Judy H. Cho
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, United States,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, United States,To whom correspondence should be addressed: Judy Cho, Hess CSM Building Floor 8th Room 118, 1470 Madison Avenue, New York, NY 10029, TEL. (212) 824-8940, FAX. (646) 537-9452,
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25
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Uhlig HH, Charbit-Henrion F, Kotlarz D, Shouval DS, Schwerd T, Strisciuglio C, de Ridder L, van Limbergen J, Macchi M, Snapper SB, Ruemmele FM, Wilson DC, Travis SP, Griffiths AM, Turner D, Klein C, Muise AM, Russell RK. Clinical Genomics for the Diagnosis of Monogenic Forms of Inflammatory Bowel Disease: A Position Paper From the Paediatric IBD Porto Group of European Society of Paediatric Gastroenterology, Hepatology and Nutrition. J Pediatr Gastroenterol Nutr 2021; 72:456-473. [PMID: 33346580 PMCID: PMC8221730 DOI: 10.1097/mpg.0000000000003017] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND It is important to identify patients with monogenic IBD as management may differ from classical IBD. In this position statement we formulate recommendations for the use of genomics in evaluating potential monogenic causes of IBD across age groups. METHODS The consensus included paediatric IBD specialists from the Paediatric IBD Porto group of the European Society of Paediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN) and specialists from several monogenic IBD research consortia. We defined key topics and performed a systematic literature review to cover indications, technologies (targeted panel, exome and genome sequencing), gene panel setup, cost-effectiveness of genetic screening, and requirements for the clinical care setting. We developed recommendations that were voted upon by all authors and Porto group members (32 voting specialists). RESULTS We recommend next-generation DNA-sequencing technologies to diagnose monogenic causes of IBD in routine clinical practice embedded in a setting of multidisciplinary patient care. Routine genetic screening is not recommended for all IBD patients. Genetic testing should be considered depending on age of IBD-onset (infantile IBD, very early-onset IBD, paediatric or young adult IBD), and further criteria, such as family history, relevant comorbidities, and extraintestinal manifestations. Genetic testing is also recommended in advance of hematopoietic stem cell transplantation. We developed a diagnostic algorithm that includes a gene panel of 75 monogenic IBD genes. Considerations are provided also for low resource countries. CONCLUSIONS Genomic technologies should be considered an integral part of patient care to investigate patients at risk for monogenic forms of IBD.
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Affiliation(s)
- Holm H. Uhlig
- Translational Gastroenterology Unit, University of Oxford, Oxford, United Kingdom
- Department of Pediatrics, University of Oxford, Oxford, United Kingdom
- Biomedical Research Center, University of Oxford, Oxford, United Kingdom
| | - Fabienne Charbit-Henrion
- Université de Paris, INSERM UMR 1163 Immunité Intestinale, APHP, Hôpital Necker Enfants Malades, Service de Génétique moléculaire, Paris, France
| | - Daniel Kotlarz
- Department of Pediatrics, Dr. von Hauner Children’s Hospital, University Hospital, LMU Munich, Munich, Germany
| | - Dror S. Shouval
- Department of Pediatrics, Dr. von Hauner Children’s Hospital, University Hospital, LMU Munich, Munich, Germany
| | - Tobias Schwerd
- Department of Pediatrics, Dr. von Hauner Children’s Hospital, University Hospital, LMU Munich, Munich, Germany
| | | | - Lissy de Ridder
- Department of Paediatric Gastroenterology, Erasmus University Medical Center Sophia Children’s Hospital, Rotterdam, the Netherlands
| | - Johan van Limbergen
- Amsterdam University Medical Centres, Emma Children’s Hospital, The Netherlands and Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology and Metabolism, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Marina Macchi
- Translational Gastroenterology Unit, University of Oxford, Oxford, United Kingdom
| | - Scott B. Snapper
- Division of Gastroenterology, Hepatology, and Nutrition, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Frank M. Ruemmele
- Université de Paris, APHP, Hôpital Necker Enfants Malades, Service de Gastroentérologie pédiatrique, Paris, France
| | - David C. Wilson
- Child Life and Health, University of Edinburgh, Department of Paediatric Gastroenterology, The Royal Hospital for Sick Children, Edinburgh
| | - Simon P.L. Travis
- Translational Gastroenterology Unit, University of Oxford, Oxford, United Kingdom
- Biomedical Research Center, University of Oxford, Oxford, United Kingdom
| | - Anne M. Griffiths
- The Hospital for Sick Children, University of Toronto
- SickKids Inflammatory Bowel Disease Centre and Cell Biology Program, Research Institute, The Hospital for Sick Children
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Toronto, Ontario, Canada
| | - Dan Turner
- Shaare Zedek Medical Center, The Hebrew University of Jerusalem, Israel
| | - Christoph Klein
- Department of Pediatrics, Dr. von Hauner Children’s Hospital, University Hospital, LMU Munich, Munich, Germany
| | - Aleixo M. Muise
- The Hospital for Sick Children, University of Toronto
- SickKids Inflammatory Bowel Disease Centre and Cell Biology Program, Research Institute, The Hospital for Sick Children
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Toronto, Ontario, Canada
| | - Richard K. Russell
- Child Life and Health, University of Edinburgh, Department of Paediatric Gastroenterology, The Royal Hospital for Sick Children, Edinburgh
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26
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Abstract
A number of diseases and conditions have been associated with prolonged or persistent exposure to non-physiological levels of reactive oxygen species (ROS). Similarly, ROS underproduction due to loss-of-function mutations in superoxide or hydrogen peroxide (H2O2)-generating enzymes is a risk factor or causative for certain diseases. However, ROS are required for basic cell functions; in particular the diffusible second messenger H2O2 that serves as signaling molecule in redox processes. This activity sets H2O2 apart from highly reactive oxygen radicals and influences the approach to drug discovery, clinical utility, and therapeutic intervention. Here we review the chemical and biological fundamentals of ROS with emphasis on H2O2 as a signaling conduit and initiator of redox relays and propose an integrated view of physiological versus non-physiological reactive species. Therapeutic interventions that target persistently altered ROS levels should include both selective inhibition of a specific source of primary ROS and careful consideration of a targeted pro-oxidant approach, an avenue that is still underdeveloped. Both strategies require attention to redox dynamics in complex cellular systems, integration of the overall spatiotemporal cellular environment, and target validation to yield effective and safe therapeutics. The only professional primary ROS producers are NADPH oxidases (NOX1-5, DUOX1-2). Many other enzymes, e.g., xanthine oxidase (XO), monoamine oxidases (MAO), lysyl oxidases (LO), lipoxygenase (LOX), and cyclooxygenase (COX), produce superoxide and H2O2 secondary to their primary metabolic function. Superoxide is too reactive to disseminate, but H2O2 is diffusible, only limited by adjacent PRDXs or GPXs, and can be apically secreted and imported into cells through aquaporin (AQP) channels. H2O2 redox signaling includes oxidation of the active site thiol in protein tyrosine phosphatases, which will inhibit their activity and thereby increase tyrosine phosphorylation on target proteins. Essential functions include the oxidative burst by NOX2 as antimicrobial innate immune response; gastrointestinal NOX1 and DUOX2 generating low H2O2 concentrations sufficient to trigger antivirulence mechanisms; and thyroidal DUOX2 essential for providing H2O2 reduced by TPO to oxidize iodide to an iodinating form which is then attached to tyrosyls in TG. Loss-of-function (LoF) variants in TPO or DUOX2 cause congenital hypothyroidism and LoF variants in the NOX2 complex chronic granulomatous disease.
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27
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Nogales C, Grønning AGB, Sadegh S, Baumbach J, Schmidt HHHW. Network Medicine-Based Unbiased Disease Modules for Drug and Diagnostic Target Identification in ROSopathies. Handb Exp Pharmacol 2021; 264:49-68. [PMID: 32780286 DOI: 10.1007/164_2020_386] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Most diseases are defined by a symptom, not a mechanism. Consequently, therapies remain symptomatic. In reverse, many potential disease mechanisms remain in arbitrary search for clinical relevance. Reactive oxygen species (ROS) are such an example. It is an attractive hypothesis that dysregulation of ROS can become a disease trigger. Indeed, elevated ROS levels of various biomarkers have been correlated with almost every disease, yet after decades of research without any therapeutic application. We here present a first systematic, non-hypothesis-based approach to transform this field as a proof of concept for biomedical research in general. We selected as seed proteins 9 families with 42 members of clinically researched ROS-generating enzymes, ROS-metabolizing enzymes or ROS targets. Applying an unbiased network medicine approach, their first neighbours were connected, and, based on a stringent subnet participation degree (SPD) of 0.4, hub nodes excluded. This resulted in 12 distinct human interactome-based ROS signalling modules, while 8 proteins remaining unconnected. This ROSome is in sharp contrast to commonly used highly curated and integrated KEGG, HMDB or WikiPathways. These latter serve more as mind maps of possible ROS signalling events but may lack important interactions and often do not take different cellular and subcellular localization into account. Moreover, novel non-ROS-related proteins were part of these forming functional hybrids, such as the NOX5/sGC, NOX1,2/NOS2, NRF2/ENC-1 and MPO/SP-A modules. Thus, ROS sources are not interchangeable but associated with distinct disease processes or not at all. Module members represent leads for precision diagnostics to stratify patients with specific ROSopathies for precision intervention. The upper panel shows the classical approach to generate hypotheses for a role of ROS in a given disease by focusing on ROS levels and to some degree the ROS type or metabolite. Low levels are considered physiological; higher amounts are thought to cause a redox imbalance, oxidative stress and eventually disease. The source of ROS is less relevant; there is also ROS-induced ROS formation, i.e. by secondary sources (see upwards arrow). The non-hypothesis-based network medicine approach uses genetically or otherwise validated risk genes to construct disease-relevant signalling modules, which will contain also ROS targets. Not all ROS sources will be relevant for a given disease; some may not be disease relevant at all. The three examples show (from left to right) the disease-relevant appearance of an unphysiological ROS modifier/toxifier protein, ROS target or ROS source.
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Affiliation(s)
- Cristian Nogales
- Department of Pharmacology and Personalised Medicine, Maastricht University, Maastricht, The Netherlands.
| | - Alexander G B Grønning
- Department of Mathematics and Computer Science, University of Southern Denmark, Odense, Denmark
| | - Sepideh Sadegh
- Chair of Experimental Bioinformatics, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Jan Baumbach
- Department of Mathematics and Computer Science, University of Southern Denmark, Odense, Denmark.,Chair of Experimental Bioinformatics, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Harald H H W Schmidt
- Department of Pharmacology and Personalised Medicine, Maastricht University, Maastricht, The Netherlands
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Kudo T, Arai K, Uchida K, Tajiri H, Hokari R, Suzuki Y, Shimizu T. Very early-onset inflammatory bowel disease in Japan: A nationwide survey. J Gastroenterol Hepatol 2021; 36:151-155. [PMID: 32530546 DOI: 10.1111/jgh.15146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 06/03/2020] [Accepted: 06/10/2020] [Indexed: 12/09/2022]
Abstract
BACKGROUND AND AIM Very early-onset inflammatory bowel disease is defined as inflammatory bowel disease diagnosed before 6 years of age. Very early-onset inflammatory bowel disease has various differential diagnoses, including primary immunodeficiency disorders, and is known to be resistant to conventional treatment. Therefore, global attention is required to manage this challenging condition. We conducted a retrospective epidemiological survey of the number of patients, final diagnosis, and examinations performed to diagnose very early-onset inflammatory bowel disease in Japan. METHODS A primary questionnaire about the number of very early-onset bowel disease cases and its diagnosis was administered to 630 pediatric facilities nationwide in Japan. A secondary survey about the examinations performed to achieve diagnosis was sent to the facilities that responded to the first survey. RESULTS The answering rate was 92.2% (581/630 facilities); 81 facilities had 225 very early-onset bowel disease patients undergoing their care during the past 68 months. Twenty-six patients (11.6%) were diagnosed with immunodeficiency-associated inflammatory bowel disease. The answering rate of the secondary survey was 70.4% (57/81 facilities). Colonoscopy, esophagogastroduodenoscopy, and small bowel imaging were performed for 99.4%, 67.5%, and 28.8% of patients, respectively. Genetic analysis was performed for 26.9% (43/160 patients) of patients, and 51.2% (22/43) of patients were diagnosed with immunodeficiency-associated inflammatory bowel disease. CONCLUSIONS Approximately 40 patients are diagnosed yearly in Japan. Imaging studies, especially for small bowel lesions, can be challenging for this unique group of patients. However, a comprehensive approach including immunological and genetic analyses appears useful for diagnosing immunodeficiency-associated inflammatory bowel disease.
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Affiliation(s)
- Takahiro Kudo
- Department of Pediatrics, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Katsuhiro Arai
- Division of Gastroenterology, National Center for Child Health and Development, Tokyo, Japan
| | - Keiichi Uchida
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Mie, Japan
| | | | - Ryota Hokari
- Department of Internal Medicine, National Defense Medical College, Saitama, Japan
| | - Yasuo Suzuki
- Inflammatory Bowel Disease Center, Toho University Sakura Medical Centre, Chiba, Japan
| | - Toshiaki Shimizu
- Department of Pediatrics, Juntendo University Faculty of Medicine, Tokyo, Japan
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Hintzsche JD, Robinson WA, Tan AC. Variant Calling in Next Generation Sequencing Data. Systems Medicine 2021. [DOI: 10.1016/b978-0-12-801238-3.11285-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Abstract
Reactive oxygen species (ROS) are ubiquitous metabolic products and important cellular signaling molecules that contribute to several biological functions. Pathophysiology arises when ROS are generated either in excess or in cell types or subcellular locations that normally do not produce ROS or when non-physiological types of ROS (e.g., superoxide instead of hydrogen peroxide) are formed. In the latter scenario, antioxidants were considered as the apparent remedy but, clinically, have consistently failed and even sometimes induced harm. The obvious reason for that is the non-selective ROS scavenging effects of antioxidants which interfere with both qualities of ROS, physiological and pathological. Therefore, it is essential to overcome this "antidote or neutralizer" strategy. We here review the most promising alternative approach by identifying the disease-relevant enzymatic sources of ROS, target these selectively, but leave physiological ROS signaling through other sources intact. Among all ROS sources, NADPH oxidases (NOX1-5 and DUOX1-2) stand out as their sole function is to produce ROS, whereas most other enzymatic sources only produce ROS as a by-product or upon biochemical uncoupling or damage. This qualifies NOXs as the main potential drug-target candidates in diseases associated with dysfunction in ROS signaling. As a reflection of this, the development of several NOX inhibitors has taken place. Recently, the WHO approved a new stem, "naxib," which refers to NADPH oxidase inhibitors, and thereby recognized NOX inhibitors as a new therapeutic class. This has been announced while clinical trials with the first-in-class compound, setanaxib (initially known as GKT137831) had been initiated. We also review the differences between the seven NOX family members in terms of structure and function in health and disease and then focus on the most advanced NOX inhibitors with an exclusive focus on clinically relevant validations and applications. Therapeutically relevant NADPH oxidase isoforms type 1, 2, 4, and 5 (NOX1, NOX2, NOX4, NOX5). Of note, NOX5 is not present in mice and rats and thus pre-clinically less studied. NOX2, formerly termed gp91phox, has been correlated with many, too many, diseases and is rather relevant as genetic deficiency in chronic granulomatous disease (CGD), treated by gene therapy. Overproduction of ROS through NOX1, NOX4, and NOX5 leads to the indicated diseases states including atherosclerosis (red), a condition where NOX4 is surprisingly protective.
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Affiliation(s)
- Mahmoud H Elbatreek
- Department of Pharmacology and Personalised Medicine, School of MeHNS, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands.
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt.
| | | | - Harald H H W Schmidt
- Department of Pharmacology and Personalised Medicine, School of MeHNS, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
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Casas AI, Nogales C, Mucke HAM, Petraina A, Cuadrado A, Rojo AI, Ghezzi P, Jaquet V, Augsburger F, Dufrasne F, Soubhye J, Deshwal S, Di Sante M, Kaludercic N, Di Lisa F, Schmidt HHHW. On the Clinical Pharmacology of Reactive Oxygen Species. Pharmacol Rev 2020; 72:801-828. [DOI: 10.1124/pr.120.019422] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Li H, He Y, Zhang C, Ba T, Guo Z, Zhuo Y, He L, Dai H. NOX1 down-regulation attenuated the autophagy and oxidative damage in pig intestinal epithelial cell following transcriptome analysis of transport stress. Gene 2020; 763:145071. [PMID: 32827682 DOI: 10.1016/j.gene.2020.145071] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/31/2020] [Accepted: 08/17/2020] [Indexed: 02/06/2023]
Abstract
The previous study indicated that transport stress resulted in oxidative damage and autophagy/mitophagy elevation, companied by NOX1 over- expression in the jejunal tissues of pigs. However, the transportation-related gene expression profile and NOX1 function in intestine remain to be explicated. In the current study, differentially expressed genes involved in PI3K-Akt and NF-κB pathways, oxidative stress and autophagy process have been identified in pig jejunal tissues after transcriptome analysis following transportation. The physiological functions of NOX1 down-regulation were explored against oxidative damage and excessive autophagy in porcine intestinal epithelial cells (IPEC-1) following NOX1 inhibitor ML171 and H2O2 treatments. NOX1 down-regulation could decrease the content of Malondialdehyde (MDA), Lactic dehydrogenase (LDH) activity and reactive oxygen species (ROS) level, and up-regulate superoxide dismutase (SOD) activity. Furthermore, mitochondrial membrane potential and content were restored, and the expressions of tight junction proteins (Claudin-1 and ZO-1) were also increased. Additionally, NOX1 inhibitior could down-regulate the expression of autophagy-associated proteins (ATG5, LC3, p62), accompanied by activating SIRT1/PGC-1α pathway. NOX1 down-regulation might alleviate oxidative stress-induced mitochondria damage and intestinal mucosal injury via modulating excessive autophagy and SIRT1/PGC-1α signaling pathway. The data will shed light on the molecular mechanism of NOX1 on intestine oxidative damage following pig transportation.
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Affiliation(s)
- Huari Li
- College of Veterinary Medicine, Huazhong Agricultural University, No.1 Shizishan Street, Wuhan 430070, Hubei, China
| | - Yulong He
- College of Veterinary Medicine, Huazhong Agricultural University, No.1 Shizishan Street, Wuhan 430070, Hubei, China
| | - Cheng Zhang
- College of Veterinary Medicine, Huazhong Agricultural University, No.1 Shizishan Street, Wuhan 430070, Hubei, China
| | - Tongtong Ba
- College of Veterinary Medicine, Huazhong Agricultural University, No.1 Shizishan Street, Wuhan 430070, Hubei, China
| | - Zeheng Guo
- College of Veterinary Medicine, Huazhong Agricultural University, No.1 Shizishan Street, Wuhan 430070, Hubei, China
| | - Yisha Zhuo
- College of Veterinary Medicine, Huazhong Agricultural University, No.1 Shizishan Street, Wuhan 430070, Hubei, China
| | - Lihua He
- College of Veterinary Medicine, Huazhong Agricultural University, No.1 Shizishan Street, Wuhan 430070, Hubei, China
| | - Hanchuan Dai
- College of Veterinary Medicine, Huazhong Agricultural University, No.1 Shizishan Street, Wuhan 430070, Hubei, China.
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Dang PMC, Rolas L, El-Benna J. The Dual Role of Reactive Oxygen Species-Generating Nicotinamide Adenine Dinucleotide Phosphate Oxidases in Gastrointestinal Inflammation and Therapeutic Perspectives. Antioxid Redox Signal 2020; 33:354-373. [PMID: 31968991 DOI: 10.1089/ars.2020.8018] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Significance: Despite their intrinsic cytotoxic properties, mounting evidence indicates that reactive oxygen species (ROS) physiologically produced by the nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (NOXs) of epithelial cells (NOX1, dual oxidase [DUOX]2) and phagocytes (NOX2) are critical for innate immune response and homeostasis of the intestinal mucosa. However, dysregulated ROS production could be a driving factor in inflammatory bowel diseases (IBDs). Recent Advances: In addition to NOX2, recent studies have demonstrated that NOX1- and DUOX2-derived ROS can regulate intestinal innate immune defense and homeostasis by impacting many processes, including bacterial virulence, expression of bacteriostatic proteins, epithelial renewal and restitution, and microbiota composition. Moreover, the antibacterial role of DUOX2 is a function conserved in evolution as it has been described in invertebrates, and lower and higher vertebrates. In humans, variants of the NOX2, NOX1, and DUOX2 genes, which are associated with impaired ROS production, have been identified in very early onset IBD, but overexpression of NOX/DUOX, especially DUOX2, has also been described in IBD, suggesting that loss-of-function or excessive activity of the ROS-generating enzymes could contribute to disease progression. Critical Issues: Therapeutic perspectives aiming at targeting NOX/DUOX in IBD should take into account the two sides of NOX/DUOX-derived ROS in intestinal inflammation. Hence, NOX/DUOX inhibitors or ROS inducers should be considered as a function of the disease context. Future Directions: A thorough understanding of the physiological and pathological regulation of NOX/DUOX in the gastrointestinal tract is an absolute pre-requisite for the development of therapeutic strategies that can modulate ROS levels in space and time.
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Affiliation(s)
- Pham My-Chan Dang
- INSERM-U1149, CNRS-ERL8252, Centre de Recherche sur l'Inflammation, Paris, France.,Faculté de Médecine, Laboratoire d'Excellence Inflamex, DHU FIRE, Université de Paris, Paris, France
| | - Loïc Rolas
- INSERM-U1149, CNRS-ERL8252, Centre de Recherche sur l'Inflammation, Paris, France
| | - Jamel El-Benna
- INSERM-U1149, CNRS-ERL8252, Centre de Recherche sur l'Inflammation, Paris, France.,Faculté de Médecine, Laboratoire d'Excellence Inflamex, DHU FIRE, Université de Paris, Paris, France
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34
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Seyed Tabib NS, Madgwick M, Sudhakar P, Verstockt B, Korcsmaros T, Vermeire S. Big data in IBD: big progress for clinical practice. Gut 2020; 69:1520-1532. [PMID: 32111636 PMCID: PMC7398484 DOI: 10.1136/gutjnl-2019-320065] [Citation(s) in RCA: 107] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 02/05/2020] [Accepted: 02/06/2020] [Indexed: 12/12/2022]
Abstract
IBD is a complex multifactorial inflammatory disease of the gut driven by extrinsic and intrinsic factors, including host genetics, the immune system, environmental factors and the gut microbiome. Technological advancements such as next-generation sequencing, high-throughput omics data generation and molecular networks have catalysed IBD research. The advent of artificial intelligence, in particular, machine learning, and systems biology has opened the avenue for the efficient integration and interpretation of big datasets for discovering clinically translatable knowledge. In this narrative review, we discuss how big data integration and machine learning have been applied to translational IBD research. Approaches such as machine learning may enable patient stratification, prediction of disease progression and therapy responses for fine-tuning treatment options with positive impacts on cost, health and safety. We also outline the challenges and opportunities presented by machine learning and big data in clinical IBD research.
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Affiliation(s)
| | - Matthew Madgwick
- Organisms and Ecosystems, Earlham Institute, Norwich, UK
- Gut microbes in health and disease, Quadram Institute Bioscience, Norwich, UK
| | - Padhmanand Sudhakar
- Department of Chronic Diseases, Metabolism and Ageing, TARGID, KU Leuven, Leuven, Belgium
- Organisms and Ecosystems, Earlham Institute, Norwich, UK
- Gut microbes in health and disease, Quadram Institute Bioscience, Norwich, UK
| | - Bram Verstockt
- Translational Research in GastroIntestinal Disorders, KU Leuven, Leuven, Belgium
- Department of Gastroenterology and Hepatology, KU Leuven University Hospitals Leuven, Leuven, Belgium
| | - Tamas Korcsmaros
- Organisms and Ecosystems, Earlham Institute, Norwich, UK
- Gut microbes in health and disease, Quadram Institute Bioscience, Norwich, UK
| | - Séverine Vermeire
- Department of Chronic Diseases, Metabolism and Ageing, TARGID, KU Leuven, Leuven, Belgium
- Department of Gastroenterology and Hepatology, KU Leuven University Hospitals Leuven, Leuven, Belgium
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35
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Khoshnevisan R, Anderson M, Babcock S, Anderson S, Illig D, Marquardt B, Sherkat R, Schröder K, Moll F, Hollizeck S, Rohlfs M, Walz C, Adibi P, Rezaei A, Andalib A, Koletzko S, Muise AM, Snapper SB, Klein C, Thiagarajah JR, Kotlarz D. NOX1 Regulates Collective and Planktonic Cell Migration: Insights From Patients With Pediatric-Onset IBD and NOX1 Deficiency. Inflamm Bowel Dis 2020; 26:1166-1176. [PMID: 32064493 PMCID: PMC7365810 DOI: 10.1093/ibd/izaa017] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND Genetic defects of pediatric-onset inflammatory bowel disease (IBD) provide critical insights into molecular factors controlling intestinal homeostasis. NOX1 has been recently recognized as a major source of reactive oxygen species (ROS) in human colonic epithelial cells. Here we assessed the functional consequences of human NOX1 deficiency with respect to wound healing and epithelial migration by studying pediatric IBD patients presenting with a stop-gain mutation in NOX1. METHODS Functional characterization of the NOX1 variant included ROS generation, wound healing, 2-dimensional collective chemotactic migration, single-cell planktonic migration in heterologous cell lines, and RNA scope and immunohistochemistry of paraffin-embedded patient tissue samples. RESULTS Using exome sequencing, we identified a stop-gain mutation in NOX1 (c.160C>T, p.54R>*) in patients with pediatric-onset IBD. Our studies confirmed that loss-of-function of NOX1 causes abrogated ROS activity, but they also provided novel mechanistic insights into human NOX1 deficiency. Cells that were NOX1-mutant showed impaired wound healing and attenuated 2-dimensional collective chemotactic migration. High-resolution microscopy of the migrating cell edge revealed a reduced density of filopodial protrusions with altered focal adhesions in NOX1-deficient cells, accompanied by reduced phosphorylation of p190A. Assessment of single-cell planktonic migration toward an epidermal growth factor gradient showed that NOX1 deficiency is associated with altered migration dynamics with loss of directionality and altered cell-cell interactions. CONCLUSIONS Our studies on pediatric-onset IBD patients with a rare sequence variant in NOX1 highlight that human NOX1 is involved in regulating wound healing by altering epithelial cytoskeletal dynamics at the leading edge and directing cell migration.
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Affiliation(s)
- Razieh Khoshnevisan
- Dr. von Hauner Children’s Hospital, Department of Pediatrics, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany,Department of Immunology, Medical Faculty, Isfahan University of Medical Sciences, Isfahan, Iran,Acquired Immunodeficiency Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Michael Anderson
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children’s Hospital, Boston, Massachusetts, USA,Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA
| | - Stephen Babcock
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children’s Hospital, Boston, Massachusetts, USA,Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA
| | - Sierra Anderson
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children’s Hospital, Boston, Massachusetts, USA,Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA
| | - David Illig
- Dr. von Hauner Children’s Hospital, Department of Pediatrics, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Benjamin Marquardt
- Dr. von Hauner Children’s Hospital, Department of Pediatrics, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Roya Sherkat
- Acquired Immunodeficiency Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Katrin Schröder
- Institute for Cardiovascular Physiology, Goethe-University, Frankfurt, Germany
| | - Franziska Moll
- Institute for Cardiovascular Physiology, Goethe-University, Frankfurt, Germany
| | - Sebastian Hollizeck
- Dr. von Hauner Children’s Hospital, Department of Pediatrics, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Meino Rohlfs
- Dr. von Hauner Children’s Hospital, Department of Pediatrics, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Christoph Walz
- Institute of Pathology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Peyman Adibi
- Integrative Functional Gastroenterology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Abbas Rezaei
- Department of Immunology, Medical Faculty, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Alireza Andalib
- Department of Immunology, Medical Faculty, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sibylle Koletzko
- Dr. von Hauner Children’s Hospital, Department of Pediatrics, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany,SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Aleixo M Muise
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada,Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada,Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada,Division of Gastroenterology, Brigham and Women’s Hospital, Boston, Massachusetts, USA,PEDI-CODE Consortium, Boston, Massachusetts, USA
| | - Scott B Snapper
- Dr. von Hauner Children’s Hospital, Department of Pediatrics, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany,Division of Gastroenterology, Hepatology and Nutrition, Boston Children’s Hospital, Boston, Massachusetts, USA,Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA,SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada,VEO-IBD Consortium, Munich, Germany
| | - Christoph Klein
- Dr. von Hauner Children’s Hospital, Department of Pediatrics, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany,SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Jay R Thiagarajah
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA,SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada,PEDI-CODE Consortium, Boston, Massachusetts, USA,Address correspondence to: Daniel Kotlarz, MD, PhD, Dr. von Hauner Children’s Hospital, Department of Pediatrics, University Hospital, Ludwig-Maximilians-Universität München, Lindwurmstrasse 4, D-80337 Munich, Germany (); Jay R. Thiagarajah, MD, PhD, Boston Children’s Hospital, Division of Gastroenterology, EN605, 300 Longwood Avenue, Boston, MA 02115, USA ()
| | - Daniel Kotlarz
- Dr. von Hauner Children’s Hospital, Department of Pediatrics, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany,Division of Gastroenterology, Hepatology and Nutrition, Boston Children’s Hospital, Boston, Massachusetts, USA,Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA,SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada,Address correspondence to: Daniel Kotlarz, MD, PhD, Dr. von Hauner Children’s Hospital, Department of Pediatrics, University Hospital, Ludwig-Maximilians-Universität München, Lindwurmstrasse 4, D-80337 Munich, Germany (); Jay R. Thiagarajah, MD, PhD, Boston Children’s Hospital, Division of Gastroenterology, EN605, 300 Longwood Avenue, Boston, MA 02115, USA ()
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Rahmani F, Rayzan E, Rahmani MR, Shahkarami S, Zoghi S, Rezaei A, Aryan Z, Najafi M, Rohlfs M, Jeske T, Aflatoonian M, Chavoshzadeh Z, Farahmand F, Motamed F, Rohani P, Alimadadi H, Mahdaviani A, Mansouri M, Tavakol M, Vanderberg M, Kotlarz D, Klein C, Rezaei N. Clinical and Mutation Description of the First Iranian Cohort of Infantile Inflammatory Bowel Disease: The Iranian Primary Immunodeficiency Registry (IPIDR). Immunol Invest 2020; 50:445-459. [PMID: 32633164 DOI: 10.1080/08820139.2020.1776725] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We describe a cohort of 25 Iranian patients with infantile inflammatory bowel disease (IBD), 14 (56%) of whom had monogenic defects. After proper screening, patients were referred for whole exome sequencing (WES). Four patients had missense mutations in the IL10 RA, and one had a large deletion in the IL10 RB. Four patients had mutations in genes implicated in host:microbiome homeostasis, including TTC7A deficiency, and two patients with novel mutations in the TTC37 and NOX1. We found a novel homozygous mutation in the SRP54 in a deceased patient and the heterozygous variant in his sibling with a milder phenotype. Three patients had combined immunodeficiency: one with ZAP-70 deficiency (T+B+NK-), and two with atypical SCID due to mutations in RAG1 and LIG4. One patient had a G6PC3 mutation without neutropenia. Eleven of the 14 patients with monogenic defects were results of consanguinity and only 4 of them were alive to this date.
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Affiliation(s)
- Farzaneh Rahmani
- Department of Radiology, Washington University School of Medicine, St Louis, Missouri, USA.,Student's Scientific Research Center, Tehran University of Medical Sciences (TUMS), Tehran, Iran.,NeuroImaging Network (NIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Elham Rayzan
- International Hematology/Oncology of Pediatrics' Experts (IHOPE), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,Research Center for Immunodeficiencies (RCID), Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Rahmani
- Department of Immunology & Hematology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Sepideh Shahkarami
- Medical Genetics Network (Megene), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Samaneh Zoghi
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases, Vienna, Austria
| | - Arezoo Rezaei
- Research Center for Immunodeficiencies (RCID), Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Aryan
- Research Center for Immunodeficiencies (RCID), Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehri Najafi
- Department of Gastroenterology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Meino Rohlfs
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, Ludwig Maximilians University, Munich, Germany
| | - Tim Jeske
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, Ludwig Maximilians University, Munich, Germany
| | - Majid Aflatoonian
- Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Chavoshzadeh
- Pediatric Infectious Research Center, Mofid Children's Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Farahmand
- Department of Gastroenterology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Farzaneh Motamed
- Department of Gastroenterology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Pejman Rohani
- Pediatric Gastroenterology, Hepatology and Nutrition Research Center, Research Institute for Children's Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hossein Alimadadi
- Department of Gastroenterology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Mahdaviani
- Pediatric Congenital Hematologic Disorders Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahboubeh Mansouri
- Immunology and Allergy Department, Mofid Children Hospital, Shahid Behehshti University of Medical Sciences, Tehran, Iran
| | - Marzieh Tavakol
- Non-communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Mirjam Vanderberg
- Laboratory for Immunology, Dept. Of Pediatrics, Leiden University Medical Center, Netherlands
| | - Daniel Kotlarz
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, Ludwig Maximilians University, Munich, Germany
| | - Christoph Klein
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, Ludwig Maximilians University, Munich, Germany
| | - Nima Rezaei
- Research Center for Immunodeficiencies (RCID), Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.,Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Tehran, Iran
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Schader T, Reschke C, Spaeth M, Wienstroer S, Wong S, Schröder K. NoxO1 Knockout Promotes Longevity in Mice. Antioxidants (Basel) 2020; 9:E226. [PMID: 32164269 DOI: 10.3390/antiox9030226] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 03/06/2020] [Accepted: 03/06/2020] [Indexed: 12/14/2022] Open
Abstract
According to the free radical theory of aging, reactive oxygen species (ROS) have been proposed to be a major cause of aging for a long time. Meanwhile, it became clear that ROS have diverse functions in a healthy organism. They act as second messengers, and as transient inhibitors of phosphatases and others. In fact, their detrimental role is highly dependent on the context of their production. NADPH oxidases (Nox) have been discovered as a controllable source of ROS. NoxO1 enables constitutive ROS formation by Nox1 by acting as a constitutively active cytosolic subunit of the complex. We previously found that both Nox1 and NoxO1 were highly expressed in the colon, and that NoxO1-/- deficiency reduces colon health. We hypothesized that a healthy colon potentially contributes to longevity and NoxO1 deficiency would reduce lifetime, at least in mouse. In contrast, here we provide evidence that the knockout of NoxO1 results in an elongated life expectancy of mice. No better endothelial function, nor an improved expression of genes related to longevity, such as Sirt1, were found, and therefore may not serve as an explanation for a longer life in NoxO1 deficiency. Rather minor systemic differences, such as lower body weight occur. As a potential reason for longer life, we suggest better DNA repair capacity in NoxO1 deficient mice. Although final fatal DNA damage appears similar between wildtype and NoxO1 knockout animals, we identified less intermediate DNA damage in colon cells of NoxO1-/- mice, while the number of cells with intact DNA is elevated in NoxO1-/- colons. We conclude that NoxO1 deficiency prolongs lifetime of mice, which correlates with less intermediate and potentially fixable DNA damage at least in colon cells.
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Wu S, Pan L, Liao H, Yao W, Shen N, Chen C, Liu D, Ge M. High-fat diet increased NADPH-oxidase-related oxidative stress and aggravated LPS-induced intestine injury. Life Sci 2020; 253:117539. [PMID: 32165213 DOI: 10.1016/j.lfs.2020.117539] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 03/04/2020] [Accepted: 03/08/2020] [Indexed: 02/07/2023]
Abstract
AIMS Lipopolysaccharide (LPS)-induced intestinal injury is a common clinical feature of sepsis. Aggravated inflammation and higher sensitivity to infection are associated with high-fat diet (HFD) in patients with type 2 diabetes and/or obesity. However, the mechanism by which HFD exacerbates LPS-induced intestinal injury has not been elucidated. This study aims to examine the effects of HFD on intestinal injury induced by LPS and the underlying mechanism. MAIN METHODS Mice were fed with HFD or regular chow for 12weeks and were then challenged with LPS. Vas2870 was administered to mice that received HFD before the initiation of the diet. The levels of tight junction protein expression, oxidative stress, organ injury, and nicotinamide adenine dinucleotide phosphate (NADPH)-associated proteins were assessed periodically. KEY FINDINGS LPS treatment resulted in severe intestinal pathological injury and increased oxidative stress, evidenced by significantly increased serum diamine oxidase, reactive oxygen species, malondialdehyde, and intestinal fatty acid binding protein contents. Additionally, a decrease in tight junction protein expression was observed, indicating a loss of tight junction integrity. LPS treatment induced the expression of Nox2 and Nox4. All the effects were more severe in HFD mice. Treatment with vas2870 conferred protection against LPS-induced intestinal injury in HFD-fed mice, partially reduced oxidative stress, and rescued the expression of tight junction proteins. CONCLUSION HFD aggravated LPS-induced intestine injury through exacerbating intestinal Nox-related oxidative stress, which led to a loss of the integrity of tight junctions and consequently increased intestinal permeability.
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Affiliation(s)
- Shan Wu
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Lijie Pan
- Vaccine Research Institute of Sun Yat-sen University, Guangzhou 510630, China
| | - Haofeng Liao
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Weifeng Yao
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Ning Shen
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Chaojin Chen
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Dezhao Liu
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China.
| | - Mian Ge
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China.
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39
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Shi Y, Dai S, Qiu C, Wang T, Zhou Y, Xue C, Yao J, Xu Y. MicroRNA-219a-5p suppresses intestinal inflammation through inhibiting Th1/Th17-mediated immune responses in inflammatory bowel disease. Mucosal Immunol 2020; 13:303-312. [PMID: 31628427 DOI: 10.1038/s41385-019-0216-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 09/11/2019] [Accepted: 09/28/2019] [Indexed: 02/04/2023]
Abstract
MicroRNA (miR)-219a-5p has been implicated in the development of numerous progression of carcinoma and autoimmune diseases. However, whether miR-219a-5p is involved in the pathogenesis of inflammatory bowel disease (IBD) remains elusive. In this study, we demonstrated that miR-219a-5p expression was significantly decreased in the inflamed intestinal mucosa and peripheral blood (PB)-CD4+ T cells from patients with IBD. Proinflammatory cytokines (e.g., IL-6, IL-12, IL-23 and TNF-α) inhibited miR-219a-5p expression in CD4+ T cells in vitro. Lentivirus-mediated miR-219a-5p downregulation facilitated Th1/Th17 cell differentiation, whereas miR-219a-5p overexpression exerted an opposite effect. Luciferase assays confirmed that ETS variant 5 (ETV5) was a functional target of miR-219a-5p and ETV5 expression was significantly increased in the inflamed intestinal mucosa and PB-CD4+ T cells from IBD patients. ETV5 overexpression enhanced Th1/Th17 immune response through upregulating the phosphorylation of STAT3 and STAT4. Importantly, supplementation of miR-219a-5p ameliorated TNBS-induced intestinal mucosal inflammation, characterized by decreased IFN-γ+ CD4+ T cells and IL-17A+ CD4+ T cells infiltration in the colonic lamina propria. Our data thus reveal a novel mechanism whereby miR-219a-5p suppresses intestinal inflammation through inhibiting Th1/Th17-mediated immune responses. miR-219a-5p might be a target for the treatment of IBD.
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Affiliation(s)
- Yan Shi
- Department of Gastroenterology, Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, China
| | - Shenglan Dai
- Department of Gastroenterology, Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, China
| | - Caiyu Qiu
- Department of Gastroenterology, Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, China
| | - Tao Wang
- Department of Gastroenterology, Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, China
| | - Yong Zhou
- Department of Gastroenterology, Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, China
| | - Cuihua Xue
- Department of Gastroenterology, Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, China
| | - Jun Yao
- Department of Gastroenterology, Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, China.
| | - Yaping Xu
- Department of Gastroenterology, Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, China.
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40
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Abstract
The epidemiology of inflammatory bowel disease has changed over the past 4 decades. The incidence is rising dramatically and the age of onset has become younger. This changing landscape of inflammatory bowel disease reflects the new recognition that the youngest children with inflammatory bowel disease are enriched in cases with underlying primary immunodeficiency and monogenic causes. The management of these cases can be quite different, with specific genetic etiologies supporting unique interventions and some requiring hematopoietic cell transplantation for effective treatment.
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Affiliation(s)
- Judith R Kelsen
- Division of Gastroenterology, Hepatology and Nutrition, 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Pierre Russo
- Department of Pathology, Division of Allergy Immunology, The Children's Hospital of Philadelphia, ARC 1216-I, 3615 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Kathleen E Sullivan
- Division of Allergy Immunology, The Children's Hospital of Philadelphia, 3615 Civic Center Boulevard, Philadelphia, PA 19104, USA.
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41
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Aviello G, Singh AK, O'Neill S, Conroy E, Gallagher W, D'Agostino G, Walker AW, Bourke B, Scholz D, Knaus UG. Colitis susceptibility in mice with reactive oxygen species deficiency is mediated by mucus barrier and immune defense defects. Mucosal Immunol 2019; 12:1316-26. [PMID: 31554901 DOI: 10.1038/s41385-019-0205-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/13/2019] [Accepted: 09/06/2019] [Indexed: 02/07/2023]
Abstract
Reactive oxygen species (ROS) generated by NADPH oxidases (NOX/DUOX) provide antimicrobial defense, redox signaling, and gut barrier maintenance. Inactivating NOX variants are associated with comorbid intestinal inflammation in chronic granulomatous disease (CGD; NOX2) and pediatric inflammatory bowel disease (IBD; NOX1); however Nox-deficient mice do not reflect human disease susceptibility. Here we assessed if a hypomorphic patient-relevant CGD mutation will increase the risk for intestinal inflammation in mice. Cyba (p22phox) mutant mice generated low intestinal ROS, while maintaining Nox4 function. The Cyba variant caused profound mucus layer disruption with bacterial penetration into crypts, dysbiosis, and a compromised innate immune response to invading microbes, leading to mortality. Approaches used in treatment-resistant CGD or pediatric IBD such as bone marrow transplantation or oral antibiotic treatment ameliorated or prevented disease in mice. The Cyba mutant mouse phenotype implicates loss of both mucus barrier and efficient innate immune defense in the pathogenesis of intestinal inflammation due to ROS deficiency, supporting a combined-hit model where a single disease variant compromises different cellular functions in interdependent compartments.
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42
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Abstract
PURPOSE OF REVIEW Immune dysregulation disorders are among the most rapidly growing set of inborn errors of immunity. One particular subset is the category where early-onset inflammatory bowel disease (IBD) is the most common manifestation. These disorders are being increasingly appreciated although there has been minimal effort to articulate a unified approach to their diagnosis and management. This review will cover current thinking and strategies related to diagnosis and management of very early-onset IBD. RECENT FINDINGS There is an expanding set of monogenic causes of early-onset IBD. In many cases, the precise genetic cause dictates management. Lessons learned from the management of these monogenic conditions can sometimes be extrapolated to other refractory cases of IBD. SUMMARY An integrated approach to diagnosis, risk analysis, and management can include diagnostic approaches not often utilized for traditional IBD such as whole exome sequencing. Management can also include nontraditional approaches such as targeted biologics or hematopoietic cell transplantation.
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43
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He Y, Sang Z, Zhuo Y, Wang X, Guo Z, He L, Zeng C, Dai H. Transport stress induces pig jejunum tissue oxidative damage and results in autophagy/mitophagy activation. J Anim Physiol Anim Nutr (Berl) 2019; 103:1521-1529. [DOI: 10.1111/jpn.13161] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 05/20/2019] [Accepted: 06/26/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Yulong He
- College of Veterinary Medicine Huazhong Agricultural University Wuhan China
| | - Zhan Sang
- College of Veterinary Medicine Huazhong Agricultural University Wuhan China
| | - Yisha Zhuo
- College of Veterinary Medicine Huazhong Agricultural University Wuhan China
| | - Xueyi Wang
- College of Veterinary Medicine Huazhong Agricultural University Wuhan China
| | - Zeheng Guo
- College of Veterinary Medicine Huazhong Agricultural University Wuhan China
| | - Lihua He
- College of Veterinary Medicine Huazhong Agricultural University Wuhan China
| | - Cuiping Zeng
- College of Veterinary Medicine Huazhong Agricultural University Wuhan China
| | - Hanchuan Dai
- College of Veterinary Medicine Huazhong Agricultural University Wuhan China
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44
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Abstract
Inflammatory bowel diseases (IBD) are chronic and recurrent inflammatory disorders of the gastrointestinal tract. The elucidation of their etiopathology requires complex and multiple approaches. Systems biology has come to fulfill this need in approaching the pathogenetic mechanisms of IBD and its etiopathology, in a comprehensive way, by combining data from different scientific sources. In combination with bioinformatics and network medicine, it uses principles from computer science, mathematics, physics, chemistry, biology, medicine and computational tools to achieve its purposes. Systems biology utilizes scientific sources that provide data from omics studies (e.g., genomics, transcriptomics, etc.) and clinical observations, whose combined analysis leads to network formation and ultimately to a more integrative image of disease etiopathogenesis. In this review, we analyze the current literature on the methods and the tools utilized by systems biology in order to cover an innovative and exciting field: IBD-omics.
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Affiliation(s)
- Nikolas Dovrolis
- Laboratory of Pharmacology, Faculty of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
| | - Eirini Filidou
- Laboratory of Pharmacology, Faculty of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
| | - George Kolios
- Laboratory of Pharmacology, Faculty of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
- Correspondence to: Prof. George Kolios, MD PhD, Laboratory of Pharmacology, Faculty of Medicine, Democritus University of Thrace, Dragana, Alexandroupolis, 68100, Greece, e-mail:
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45
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Schulte L, Hohwieler M, Müller M, Klaus J. Intestinal Organoids as a Novel Complementary Model to Dissect Inflammatory Bowel Disease. Stem Cells Int 2019; 2019:8010645. [PMID: 31015842 DOI: 10.1155/2019/8010645] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 02/04/2019] [Indexed: 12/13/2022] Open
Abstract
Inflammatory bowel diseases (IBDs) include colitis ulcerosa and Crohn's disease, besides the rare microscopic colitis. Both diseases show a long-lasting, relapsing-remitting, or even chronic active course with tremendous impact on quality of life. IBDs frequently cause disability, surgical interventions, and high costs; as in other autoimmune diseases, their prevalent occurrence at an early phase of life raises the burden on health care systems. Unfortunately, our understanding of the pathogenesis is still incomplete and treatment therefore largely focuses on suppressing the resulting excessive inflammation. One obstacle for deciphering the causative processes is the scarcity of models that parallel the development of the disease, since intestinal inflammation is mostly induced artificially; moreover, the intestinal epithelium, which strongly contributes to IBD pathogenesis, is difficult to assess. Recently, the development of intestinal epithelial organoids has overcome many of those problems. Here, we give an overview on the current understanding of the pathogenesis of IBDs with reference to the limitations of previous well-established experimental models. We highlight the advantages and detriments of recent organoid-based experimental setups within the IBD field and suggest possible future applications.
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46
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Zeng MY, Miralda I, Armstrong CL, Uriarte SM, Bagaitkar J. The roles of NADPH oxidase in modulating neutrophil effector responses. Mol Oral Microbiol 2019; 34:27-38. [PMID: 30632295 DOI: 10.1111/omi.12252] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 12/20/2018] [Accepted: 01/07/2019] [Indexed: 12/12/2022]
Abstract
Neutrophils are phagocytic innate immune cells essential for killing bacteria via activation of a wide variety of effector responses and generation of large amounts of reactive oxygen species (ROS). Majority of the ROS in neutrophils is generated by activation of the superoxide-generating enzyme nicotinamide adenine dinucleotide phosphate (NADPH) oxidase. Independent of their anti-microbial function, NADPH oxidase-derived ROS have emerged as key regulators of host immune responses and neutrophilic inflammation. Data from patients with inherited defects in the NADPH oxidase subunit alleles that ablate its enzyme function as well as mouse models demonstrate profound dysregulation of host inflammatory responses, neutrophil hyper-activation and tissue damage in response to microbial ligands or tissue trauma. A large body of literature now demonstrates how oxidants function as essential signaling molecules that are essential for the regulation of neutrophil responses during priming, degranulation, neutrophil extracellular trap formation, and apoptosis, independent of their role in microbial killing. In this review we summarize how NADPH oxidase-derived oxidants modulate neutrophil function in a cell intrinsic manner and regulate host inflammatory responses. In addition, we summarize studies that have elucidated possible roles of oxidants in neutrophilic responses within the oral mucosa and periodontal disease.
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Affiliation(s)
- Melody Y Zeng
- Department of Pediatrics and Drukier Institute for Children's Health, Weill Cornell Medical College, New York City, New York
| | - Irina Miralda
- Department of Microbiology and Immunology, University of Louisville, Louisville, Kentucky
| | - Cortney L Armstrong
- Department of Microbiology and Immunology, University of Louisville, Louisville, Kentucky
| | - Silvia M Uriarte
- Department of Microbiology and Immunology, University of Louisville, Louisville, Kentucky.,Department of Medicine, University of Louisville, Louisville, Kentucky
| | - Juhi Bagaitkar
- Department of Microbiology and Immunology, University of Louisville, Louisville, Kentucky.,Department of Oral Immunology and Infectious Diseases, University of Louisville, Louisville, Kentucky
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47
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Lipinski S, Petersen BS, Barann M, Piecyk A, Tran F, Mayr G, Jentzsch M, Aden K, Stengel ST, Klostermeier UC, Sheth V, Ellinghaus D, Rausch T, Korbel JO, Nothnagel M, Krawczak M, Gilissen C, Veltman JA, Forster M, Forster P, Lee CC, Fritscher-Ravens A, Schreiber S, Franke A, Rosenstiel P. Missense variants in NOX1 and p22phox in a case of very-early-onset inflammatory bowel disease are functionally linked to NOD2. Cold Spring Harb Mol Case Stud 2019; 5:mcs.a002428. [PMID: 30709874 PMCID: PMC6371741 DOI: 10.1101/mcs.a002428] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 10/29/2018] [Indexed: 02/07/2023] Open
Abstract
Whole-genome and whole-exome sequencing of individual patients allow the study of rare and potentially causative genetic variation. In this study, we sequenced DNA of a trio comprising a boy with very-early-onset inflammatory bowel disease (veoIBD) and his unaffected parents. We identified a rare, X-linked missense variant in the NAPDH oxidase NOX1 gene (c.C721T, p.R241C) in heterozygous state in the mother and in hemizygous state in the patient. We discovered that, in addition, the patient was homozygous for a common missense variant in the CYBA gene (c.T214C, p.Y72H). CYBA encodes the p22phox protein, a cofactor for NOX1. Functional assays revealed reduced cellular ROS generation and antibacterial capacity of NOX1 and p22phox variants in intestinal epithelial cells. Moreover, the identified NADPH oxidase complex variants affected NOD2-mediated immune responses, and p22phox was identified as a novel NOD2 interactor. In conclusion, we detected missense variants in a veoIBD patient that disrupt the host response to bacterial challenges and reduce protective innate immune signaling via NOD2. We assume that the patient's individual genetic makeup favored disturbed intestinal mucosal barrier function.
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Affiliation(s)
- Simone Lipinski
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
| | - Britt-Sabina Petersen
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
| | - Matthias Barann
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
| | - Agnes Piecyk
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
| | - Florian Tran
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany.,Department of General Internal Medicine, Christian-Albrechts-University, University Hospital Schleswig-Holstein, 24105 Kiel, Germany
| | - Gabriele Mayr
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
| | - Marlene Jentzsch
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
| | - Konrad Aden
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany.,Department of General Internal Medicine, Christian-Albrechts-University, University Hospital Schleswig-Holstein, 24105 Kiel, Germany
| | - Stephanie T Stengel
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
| | - Ulrich C Klostermeier
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
| | - Vrunda Sheth
- Life Technologies, Beverly, Massachusetts 01915, USA
| | - David Ellinghaus
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
| | - Tobias Rausch
- European Molecular Biology Laboratory (EMBL), Genome Biology Unit, 69117 Heidelberg, Germany
| | - Jan O Korbel
- European Molecular Biology Laboratory (EMBL), Genome Biology Unit, 69117 Heidelberg, Germany
| | - Michael Nothnagel
- Institute of Medical Informatics and Statistics (IMIS), Christian-Albrechts University, 24105 Kiel, Germany
| | - Michael Krawczak
- Institute of Medical Informatics and Statistics (IMIS), Christian-Albrechts University, 24105 Kiel, Germany
| | - Christian Gilissen
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, Nijmegen 6525, The Netherlands
| | - Joris A Veltman
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, Nijmegen 6525, The Netherlands.,Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne NE1 3BZ, United Kingdom
| | - Michael Forster
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
| | - Peter Forster
- Murray Edwards College, University of Cambridge, Cambridge CB3 0DF, United Kingdom
| | - Clarence C Lee
- Department of General Internal Medicine, Christian-Albrechts-University, University Hospital Schleswig-Holstein, 24105 Kiel, Germany
| | - Annette Fritscher-Ravens
- Department of General Internal Medicine, Christian-Albrechts-University, University Hospital Schleswig-Holstein, 24105 Kiel, Germany
| | - Stefan Schreiber
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany.,Department of General Internal Medicine, Christian-Albrechts-University, University Hospital Schleswig-Holstein, 24105 Kiel, Germany
| | - Andre Franke
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
| | - Philip Rosenstiel
- Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University, 24105 Kiel, Germany
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48
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Abstract
Recent advances in molecular biology have provided important insights into the genetic background of various inflammatory diseases. In particular, genome-wide association studies of inflammatory diseases have revealed genetic loci that play critical roles in the pathology of inflammation. Whole-exome and whole-genome sequencing analyses have also identified more than 300 causative genes for primary immunodeficiency diseases (PIDs). Some genetic loci that are associated with inflammatory diseases are mutated in PIDs, suggesting close relationships between inflammation and PIDs. Inflammatory diseases for which genetic associations have been described include inflammatory bowel disease (IBD), multiple sclerosis, rheumatoid arthritis, type 1 diabetes mellitus, and systemic lupus erythematosus. Herein, I discuss about the genetic interactions between IBD and PIDs.
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Affiliation(s)
- Hirokazu Kanegane
- a Department of Child Health and Development, Graduate School of Medical and Dental Sciences , Tokyo Medical and Dental University (TMDU) , Tokyo , Japan
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49
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Abstract
Reactive oxygen species (ROS) are highly reactive oxygen derivatives. Initially, they were considered as metabolic by-products (of mitochondria in particular), which consistently lead to aging and disease. Over the last decades, however, it became increasingly apparent that virtually all eukaryotic cells possess specifically ROS-producing enzymes, namely, NOX NADPH oxidases. In most mammals, there are seven NOX isoforms: three closely related isoforms, NOX1, 2, 3, which are activated by cytoplasmic subunits; NOX4, which appears to be constitutively active; and the EF-hand-containing Ca2+-activated isoforms NOX5 and DUOX1 and 2. Loss-of-function mutations in NOX genes can lead to serious human disease. NOX2 deficiency leads to primary immune deficiency, while DUOX2 deficiency presents as congenital hypothyroidism. Nox-deficient mice provide important tools to explore the physiological functions of various NADPH oxidases as a loss of function in Nox2, Nox3, and Duox2 leads to a spontaneous phenotype. The genetic absence of Nox1, Nox4, and Duox1 does not result in an obvious mouse phenotype (the NOX5 gene is absent in rodents and can therefore not be studied using knockout mice). Since the discovery of the NOX family at the turn of the millennium, much progress in understanding the biochemistry and the physiology of NOX has been made; however many questions remain unanswered to date. This chapter is an overview of our present knowledge on mammalian NOX/DUOX enzymes.
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Affiliation(s)
- Hélène Buvelot
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
| | - Vincent Jaquet
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Karl-Heinz Krause
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
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50
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Abstract
Reactive oxygen species (ROS) are critical redox regulators of cellular dynamics controlling homeostasis. Although numerous fluorescent probes are currently available to measure ROS in cell-based assays, the short-lived nature of these molecules renders their detection challenging in more complex biological systems, such as the gastrointestinal tract in vivo. However, in the past decade, significant progress has been made in the development of novel imaging technologies and probes, facilitating ROS quantification with high sensitivity, selectivity, and temporal resolution. The IVIS Spectrum (PerkinElmer) is an optical imaging system for small animal imaging allowing precise and noninvasive visualization of fluorescent or bioluminescent signals. Here, we describe a reproducible and comprehensive method for the measurement of physiological intestinal NADPH oxidase-derived ROS by using the chemiluminescent probe L-012. Using transgenic mice deficient in Nox isoforms expressed in the intestinal mucosa, we delineate the contribution of gut epithelial versus immune cell NADPH oxidase activity in homeostatic conditions. We also discuss L-012 probe specificity and potential alternatives for in vivo studies.
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Affiliation(s)
- Emer Conroy
- Conway Institute, University College Dublin, Dublin, Ireland
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