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Schalich KM, Buendia MA, Kaur H, Choksi YA, Washington MK, Codreanu GS, Sherrod SD, McLean JA, Peek, Jr. RM, Acra SA, Townsend SD, Yan F. A human milk oligosaccharide prevents intestinal inflammation in adulthood via modulating gut microbial metabolism. mBio 2024; 15:e0029824. [PMID: 38441000 PMCID: PMC11005405 DOI: 10.1128/mbio.00298-24] [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: 02/05/2024] [Accepted: 02/09/2024] [Indexed: 03/06/2024] Open
Abstract
Observational evidence suggests that human milk oligosaccharides (HMOs) promote the growth of commensal bacteria in early life and adulthood. However, the mechanisms by which HMOs benefit health through modulation of gut microbial homeostasis remain largely unknown. 2'-fucosyllactose (2'-FL) is the most abundant oligosaccharide in human milk and contributes to the essential health benefits associated with human milk consumption. Here, we investigated how 2'-FL prevents colitis in adulthood through its effects on the gut microbial community. We found that the gut microbiota from adult mice that consumed 2'-FL exhibited an increase in abundance of several health-associated genera, including Bifidobacterium and Lactobacillus. The 2'-FL-modulated gut microbial community exerted preventive effects on colitis in adult mice. By using Bifidobacterium infantis as a 2'-FL-consuming bacterial model, exploratory metabolomics revealed novel 2'-FL-enriched secretory metabolites by Bifidobacterium infantis, including pantothenol. Importantly, pantothenate significantly protected the intestinal barrier against oxidative stress and mitigated colitis in adult mice. Furthermore, microbial metabolic pathway analysis identified 26 dysregulated metabolic pathways in fecal microbiota from patients with ulcerative colitis, which were significantly regulated by 2'-FL treatment in adult mice, indicating that 2'-FL has the potential to rectify dysregulated microbial metabolism in colitis. These findings support the contribution of the 2'-FL-shaped gut microbial community and bacterial metabolite production to the protection of intestinal integrity and prevention of intestinal inflammation in adulthood.IMPORTANCEAt present, neither basic research nor clinical studies have revealed the exact biological functions or mechanisms of action of individual oligosaccharides during development or in adulthood. Thus, it remains largely unknown whether human milk oligosaccharides could serve as effective therapeutics for gastrointestinal-related diseases. Results from the present study uncover 2'-FL-driven alterations in bacterial metabolism and identify novel B. infantis-secreted metabolites following the consumption of 2'-FL, including pantothenol. This work further demonstrates a previously unrecognized role of pantothenate in significantly protecting the intestinal barrier against oxidative stress and mitigating colitis in adult mice. Remarkably, 2'-FL-enhanced bacterial metabolic pathways are found to be dysregulated in the fecal microbiota of ulcerative colitis patients. These novel metabolic pathways underlying the bioactivities of 2'-FL may lay a foundation for applying individual oligosaccharides for prophylactic intervention for diseases associated with impaired intestinal homeostasis.
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Affiliation(s)
- Kasey M. Schalich
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Matthew A. Buendia
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Harpreet Kaur
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Yash A. Choksi
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - M. Kay Washington
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Gabriela S. Codreanu
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee, USA
- Center for Innovative Technology, Vanderbilt University, Nashville, Tennessee, USA
| | - Stacy D. Sherrod
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee, USA
- Center for Innovative Technology, Vanderbilt University, Nashville, Tennessee, USA
| | - John A. McLean
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee, USA
- Center for Innovative Technology, Vanderbilt University, Nashville, Tennessee, USA
| | - Richard M. Peek, Jr.
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Sari A. Acra
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Steven D. Townsend
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee, USA
| | - Fang Yan
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA
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Kaur H, Ali SA, Short SP, Williams CS, Goettel JA, Washington MK, Peek RM, Acra SA, Yan F. Identification of a functional peptide of a probiotic bacterium-derived protein for the sustained effect on preventing colitis. Gut Microbes 2023; 15:2264456. [PMID: 37815528 PMCID: PMC10566403 DOI: 10.1080/19490976.2023.2264456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 09/25/2023] [Indexed: 10/11/2023] Open
Abstract
Several probiotic-derived factors have been identified as effectors of probiotics for exerting beneficial effects on the host. However, there is a paucity of studies to elucidate mechanisms of their functions. p40, a secretory protein, is originally isolated from a probiotic bacterium, Lactobacillus rhamnosus GG. Thus, this study aimed to apply structure-functional analysis to define the functional peptide of p40 that modulates the epigenetic program in intestinal epithelial cells for sustained prevention of colitis. In silico analysis revealed that p40 is composed of a signal peptide (1-28 residues) followed by a coiled-coil domain with uncharacterized function on the N-terminus, a linker region, and a β-sheet domain with high homology to CHAP on the C-terminus. Based on the p40 three-dimensional structure model, two recombinant p40 peptides were generated, p40N120 (28-120 residues) and p40N180 (28-180 residues) that contain first two and first three coiled coils, respectively. Compared to full-length p40 (p40F) and p40N180, p40N120 showed similar or higher effects on up-regulating expression of Setd1b (encoding a methyltransferase), promoting mono- and trimethylation of histone 3 on lysine 4 (H3K4me1/3), and enhancing Tgfb gene expression and protein production that leads to SMAD2 phosphorylation in human colonoids and a mouse colonic epithelial cell line. Furthermore, supplementation with p40F and p40N120 in early life increased H3K4me1, Tgfb expression and differentiation of regulatory T cells (Tregs) in the colon, and mitigated disruption of epithelial barrier and inflammation induced by DSS in adult mice. This study reveals the structural feature of p40 and identifies a functional peptide of p40 that could maintain intestinal homeostasis.
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Affiliation(s)
- Harpreet Kaur
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Syed Azmal Ali
- Division of Proteomics of Stem Cell and Cancer, German Cancer Research Center, Heidelberg, Germany
| | - Sarah P. Short
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | | | - Jeremy A. Goettel
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
- Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, TN, USA
- Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University Medical Center, Nashville, TN, USA
| | - M. Kay Washington
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Richard M. Peek
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Sari A. Acra
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Fang Yan
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA
- Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, TN, USA
- Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
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Shelton CD, Sing E, Mo J, Shealy NG, Yoo W, Thomas J, Fitz GN, Castro PR, Hickman TT, Torres TP, Foegeding NJ, Zieba JK, Calcutt MW, Codreanu SG, Sherrod SD, McLean JA, Peck SH, Yang F, Markham NO, Liu M, Byndloss MX. An early-life microbiota metabolite protects against obesity by regulating intestinal lipid metabolism. Cell Host Microbe 2023; 31:1604-1619.e10. [PMID: 37794592 PMCID: PMC10593428 DOI: 10.1016/j.chom.2023.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [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: 04/06/2023] [Revised: 08/07/2023] [Accepted: 09/06/2023] [Indexed: 10/06/2023]
Abstract
The mechanisms by which the early-life microbiota protects against environmental factors that promote childhood obesity remain largely unknown. Using a mouse model in which young mice are simultaneously exposed to antibiotics and a high-fat (HF) diet, we show that Lactobacillus species, predominant members of the small intestine (SI) microbiota, regulate intestinal epithelial cells (IECs) to limit diet-induced obesity during early life. A Lactobacillus-derived metabolite, phenyllactic acid (PLA), protects against metabolic dysfunction caused by early-life exposure to antibiotics and a HF diet by increasing the abundance of peroxisome proliferator-activated receptor γ (PPAR-γ) in SI IECs. Therefore, PLA is a microbiota-derived metabolite that activates protective pathways in the small intestinal epithelium to regulate intestinal lipid metabolism and prevent antibiotic-associated obesity during early life.
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Affiliation(s)
- Catherine D Shelton
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Elizabeth Sing
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Jessica Mo
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Nicolas G Shealy
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Woongjae Yoo
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Julia Thomas
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Gillian N Fitz
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Pollyana R Castro
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Laboratory of Immunoinflammation, Department of Genetics, Evolution, Microbiology, and Immunology, Institute of Biology, University of Campinas, Campinas, São Paulo 12083-862, Brazil
| | - Tara T Hickman
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Teresa P Torres
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Nora J Foegeding
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Jacob K Zieba
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - M Wade Calcutt
- Mass Spectrometry Research Center and Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Simona G Codreanu
- Center for Innovative Technology and Department of Chemistry, Vanderbilt University, Nashville, TN 37232, USA
| | - Stacy D Sherrod
- Center for Innovative Technology and Department of Chemistry, Vanderbilt University, Nashville, TN 37232, USA
| | - John A McLean
- Center for Innovative Technology and Department of Chemistry, Vanderbilt University, Nashville, TN 37232, USA
| | - Sun H Peck
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA; Department of Biomedical Engineering, Vanderbilt University School of Engineering, Nashville, TN 37232, USA; Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN, USA; Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Fan Yang
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA; Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Nicholas O Markham
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN, USA; Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA; Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN, USA; Vanderbilt Institute of Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Min Liu
- Department of Pathology and Molecular Medicine, Metabolic Diseases Institute, University of Cincinnati College of Medicine, Cincinnati, OH 45237, USA
| | - Mariana X Byndloss
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute of Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Digestive Disease Center, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Microbiome Innovation Center, Vanderbilt University, Nashville, TN 37235, USA; Howard Hughes Medical Institute, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
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Schalich K, Rajagopala S, Das S, O’Connell R, Yan F. Intestinal epithelial cell-derived components regulate transcriptome of Lactobacillus rhamnosus GG. Front Microbiol 2023; 13:1051310. [PMID: 36687654 PMCID: PMC9846326 DOI: 10.3389/fmicb.2022.1051310] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 11/24/2022] [Indexed: 01/06/2023] Open
Abstract
Introduction Intestinal epithelial cells (IECs) provide the frontline responses to the gut microbiota for maintaining intestinal homeostasis. Our previous work revealed that IEC-derived components promote the beneficial effects of a commensal and probiotic bacterium, Lactobacillus rhamnosus GG (LGG). This study aimed to elucidate the regulatory effects of IEC-derived components on LGG at the molecular level. Methods Differential gene expression in LGG cultured with IEC-derived components at the timepoint between the exponential and stationary phase was studied by RNA sequencing and functional analysis. Results The transcriptomic profile of LGG cultured with IEC-derived components was significantly different from that of control LGG, with 231 genes were significantly upregulated and 235 genes significantly down regulated (FDR <0.05). The Clusters of Orthologous Groups (COGs) and Gene Ontology (GO) analysis demonstrated that the predominant genes enriched by IEC-derived components are involved in nutrient acquisition, including transporters for amino acids, metals, and sugars, biosynthesis of amino acids, and in the biosynthesis of cell membrane and cell wall, including biosynthesis of fatty acid and lipoteichoic acid. In addition, genes associated with cell division and translation are upregulated by IEC-derived components. The outcome of the increased transcription of these genes is supported by the result that IEC-derived components significantly promoted LGG growth. The main repressed genes are associated with the metabolism of amino acids, purines, carbohydrates, glycerophospholipid, and transcription, which may reflect regulation of metabolic mechanisms in response to the availability of nutrients in bacteria. Discussion These results provide mechanistic insight into the interactions between the gut microbiota and the host.
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Affiliation(s)
- Kasey Schalich
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Seesandra Rajagopala
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Suman Das
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States,Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Ryan O’Connell
- Department of Pathology, University of Utah, Salt Lake City, UT, United States
| | - Fang Yan
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, United States,Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, United States,*Correspondence: Fang Yan,
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Latour YL, Allaman MM, Barry DP, Smith TM, Williams KJ, McNamara KM, Jacobse J, Goettel JA, Delgado AG, Piazuelo MB, Zhao S, Gobert AP, Wilson KT. Epithelial talin-1 protects mice from citrobacter rodentium-induced colitis by restricting bacterial crypt intrusion and enhancing t cell immunity. Gut Microbes 2023; 15:2192623. [PMID: 36951501 PMCID: PMC10038039 DOI: 10.1080/19490976.2023.2192623] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 03/13/2023] [Indexed: 03/24/2023] Open
Abstract
Pathogenic enteric Escherichia coli present a significant burden to global health. Food-borne enteropathogenic E. coli (EPEC) and Shiga toxin-producing E. coli (STEC) utilize attaching and effacing (A/E) lesions and actin-dense pedestal formation to colonize the gastrointestinal tract. Talin-1 is a large structural protein that links the actin cytoskeleton to the extracellular matrix though direct influence on integrins. Here we show that mice lacking talin-1 in intestinal epithelial cells (Tln1Δepi) have heightened susceptibility to colonic disease caused by the A/E murine pathogen Citrobacter rodentium. Tln1Δepi mice exhibit decreased survival, and increased colonization, colon weight, and histologic colitis compared to littermate Tln1fl/fl controls. These findings were associated with decreased actin polymerization and increased infiltration of innate myeloperoxidase-expressing immune cells, confirmed as neutrophils by flow cytometry, but more bacterial dissemination deep into colonic crypts. Further evaluation of the immune population recruited to the mucosa in response to C. rodentium revealed that loss of Tln1 in colonic epithelial cells (CECs) results in impaired recruitment and activation of T cells. C. rodentium infection-induced colonic mucosal hyperplasia was exacerbated in Tln1Δepi mice compared to littermate controls. We demonstrate that this is associated with decreased CEC apoptosis and crowding of proliferating cells in the base of the glands. Taken together, talin-1 expression by CECs is important in the regulation of both epithelial renewal and the inflammatory T cell response in the setting of colitis caused by C. rodentium, suggesting that this protein functions in CECs to limit, rather than contribute to the pathogenesis of this enteric infection.
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Affiliation(s)
- Yvonne L. Latour
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Margaret M. Allaman
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Daniel P. Barry
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Thaddeus M. Smith
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Kamery J. Williams
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Kara M. McNamara
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Program in Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Justin Jacobse
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Jeremy A. Goettel
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Alberto G. Delgado
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - M. Blanca Piazuelo
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Shilin Zhao
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Alain P. Gobert
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Keith T. Wilson
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Program in Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
- Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, TN, USA
- Medical Service, Veterans Affairs Tennessee Valley Healthcare System, Nashville, TN, USA
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McMurray HR, Stern HA, Ambeskovic A, Land H, McCall MN. Protocol to use TopNet for gene regulatory network modeling using gene expression data from perturbation experiments. STAR Protoc 2022; 3:101737. [PMID: 36181678 PMCID: PMC9529586 DOI: 10.1016/j.xpro.2022.101737] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/28/2022] [Accepted: 09/07/2022] [Indexed: 01/26/2023] Open
Abstract
Inference of gene regulatory networks from gene perturbation experiments is the most reliable approach for investigating interdependence between genes. Here, we describe the initial gene perturbations, expression measurements, and preparation steps, followed by network modeling using TopNet. Summarization and visualization of the estimated networks and optional genetic testing of dependencies revealed by the network model are demonstrated. While developed for gene perturbation experiments, TopNet models data in which nodes are both perturbed and measured. For complete details on the use and execution of this protocol, please refer to McMurray et al. (2021).
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Affiliation(s)
- Helene R McMurray
- Department of Biomedical Genetics, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA; Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA
| | - Harry A Stern
- Center for Integrated Research Computing, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA
| | - Aslihan Ambeskovic
- Department of Biomedical Genetics, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA; Wilmot Cancer Institute, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA
| | - Hartmut Land
- Department of Biomedical Genetics, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA; Wilmot Cancer Institute, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA
| | - Matthew N McCall
- Department of Biomedical Genetics, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA; Wilmot Cancer Institute, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA; Department of Biostatistics and Computational Biology, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA.
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Parshenkov A, Hennet T. Glycosylation-Dependent Induction of Programmed Cell Death in Murine Adenocarcinoma Cells. Front Immunol 2022; 13:797759. [PMID: 35222379 PMCID: PMC8866831 DOI: 10.3389/fimmu.2022.797759] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 01/24/2022] [Indexed: 11/24/2022] Open
Abstract
Altered surface glycosylation is a major hallmark of tumor cells associated with aggressive phenotype and poor prognosis. By recognizing specific carbohydrate motifs, lectins can be applied to distinguish tumor from healthy cells based on the expression of glycosylation-dependent markers. Through their ability to bind to specific carbohydrates, lectins induce cell agglutination and cross-link surface glycoproteins, thereby mediating mitogenic and death-inducing effects in various cell types. The carbohydrate-selective cytotoxic effect of lectins also enables their possible application in therapies targeting cancer cells. To clarify the intracellular pathways mediating cell death induced by a group of plant and fungal lectins, we investigated mouse adenocarcinoma MC-38 cells harboring inactive genes involved in apoptosis, necroptosis and pyroptosis. Treatment of MC-38 cells with wheat germ agglutinin, Maackia amurensis lectin I, and Aleuria aurantia lectin induced multiple cell death pathways through reactions that relied on the autophagy machinery without depending on caspase activation. Furthermore, inhibition of de novo protein synthesis by cycloheximide strongly decreased the cytotoxic response, indicating that the lectins investigated induced cell death via effector molecules that are not expressed under normal circumstances and supporting the non-apoptotic nature of cell death. The broad cytotoxic response to lectins can be beneficial for the development of combination therapies targeting tumor cells. Given that tumors acquire resistance to various cytotoxic treatments because of mutations in cell death pathways, compounds inducing broad cytotoxic responses, such as lectins, represent potent sensitizers to promote tumor cell killing.
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Affiliation(s)
| | - Thierry Hennet
- Institute of Physiology, University of Zurich, Zurich, Switzerland
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Soroosh A, Fang K, Hoffman JM, Law IKM, Videlock E, Lokhandwala ZA, Zhao JJ, Hamidi S, Padua DM, Frey MR, Pothoulakis C, Rankin CR. Loss of miR-24-3p promotes epithelial cell apoptosis and impairs the recovery from intestinal inflammation. Cell Death Dis 2021; 13:8. [PMID: 34923573 PMCID: PMC8684555 DOI: 10.1038/s41419-021-04463-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 11/18/2021] [Accepted: 12/07/2021] [Indexed: 01/02/2023]
Abstract
AbstractWhile apoptosis plays a significant role in intestinal homeostasis, it can also be pathogenic if overactive during recovery from inflammation. We recently reported that microRNA-24-3p (miR-24-3p) is elevated in the colonic epithelium of ulcerative colitis patients during active inflammation, and that it reduced apoptosis in vitro. However, its function during intestinal restitution following inflammation had not been examined. In this study, we tested the influence of miR-24-3p on mucosal repair by studying recovery from colitis in both novel miR-24-3p knockout and miR-24-3p-inhibited mice. We observed that knockout mice and mice treated with a miR-24-3p inhibitor had significantly worsened recovery based on weight loss, colon length, and double-blinded histological scoring. In vivo and in vitro analysis of miR-24-3p inhibition in colonic epithelial cells revealed that inhibition promotes apoptosis and increases levels of the pro-apoptotic protein BIM. Further experiments determined that silencing of BIM reversed the pro-apoptotic effects of miR-24-3p inhibition. Taken together, these data suggest that miR-24-3p restrains intestinal epithelial cell apoptosis by targeting BIM, and its loss of function is detrimental to epithelial restitution following intestinal inflammation.
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McMurray HR, Ambeskovic A, Newman LA, Aldersley J, Balakrishnan V, Smith B, Stern HA, Land H, McCall MN. Gene network modeling via TopNet reveals functional dependencies between diverse tumor-critical mediator genes. Cell Rep 2021; 37:110136. [PMID: 34936873 PMCID: PMC8803128 DOI: 10.1016/j.celrep.2021.110136] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 12/23/2020] [Revised: 08/02/2021] [Accepted: 11/25/2021] [Indexed: 11/08/2022] Open
Abstract
Malignant cell transformation and the underlying reprogramming of gene
expression require the cooperation of multiple oncogenic mutations. This
cooperation is reflected in the synergistic regulation of non-mutant downstream
genes, so-called cooperation response genes (CRGs). CRGs affect diverse hallmark
features of cancer cells and are not known to be functionally connected.
However, they act as critical mediators of the cancer phenotype at an
unexpectedly high frequency >50%, as indicated by genetic perturbations.
Here, we demonstrate that CRGs function within a network of strong genetic
interdependencies that are critical to the malignant state. Our network modeling
methodology, TopNet, takes the approach of incorporating uncertainty in the
underlying gene perturbation data and can identify non-linear gene interactions.
In the dense space of gene connectivity, TopNet reveals a sparse topological
gene network architecture, effectively pinpointing functionally relevant gene
interactions. Thus, among diverse potential applications, TopNet has utility for
identification of non-mutant targets for cancer intervention. Malignant cell transformation requires the cooperation of multiple
oncogenic mutations. Here, we demonstrate that non-mutated genes function within
a network of strong genetic interdependencies that are critical to the malignant
state. Our network modeling methodology, TopNet, reveals a sparse topological
gene network architecture, effectively pinpointing functionally relevant gene
interactions.
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10
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Zhao G, Williams J, Washington MK, Yang Y, Long J, Townsend SD, Yan F. 2'-Fucosyllactose Ameliorates Chemotherapy-Induced Intestinal Mucositis by Protecting Intestinal Epithelial Cells Against Apoptosis. Cell Mol Gastroenterol Hepatol 2021; 13:441-457. [PMID: 34607083 PMCID: PMC8688723 DOI: 10.1016/j.jcmgh.2021.09.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 09/21/2021] [Accepted: 09/22/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS Intestinal mucositis, a severe complication of antineoplastic therapeutics, is characterized by mucosal injury and inflammation in the small intestine. Therapies for the prevention and treatment of this disease are needed. We investigated whether 2'-fucosyllactose (2'-FL), an abundant oligosaccharide in human milk, protects intestinal integrity and ameliorates intestinal mucositis. METHODS A mouse small intestinal epithelial (MSIE) cell line, mouse enteroid cultures, and human gastrointestinal tumor cell lines (AGS and HT29) were co-treated with the chemotherapy agent 5-fluorouracil (5-FU) and 2'-FL. Mice were injected intraperitoneally with 5-FU to induce intestinal mucositis. 2'-FL was administered in the drinking water to mice before (pretreatment) or concurrently with 5-FU injection. Body weight and pathologic changes were analyzed. RESULTS 2'-FL alleviated 5-FU inhibition of cell growth in MSIE cells, but not in AGS and HT29 cells. The 5-FU-induced apoptosis in MSIE cells and enteroids was suppressed by 2'-FL. Compared with 5-FU treatment alone, 2'-FL pretreatment protected against body weight loss, and ameliorated inflammation scores, proinflammatory cytokine production, shortening of villi, epithelial cell apoptosis, goblet cell loss, and tight junctional complex disruption in the small intestine. 2'-FL concurrent treatment had less of an effect on intestinal mucositis than 2'-FL pretreatment. Interestingly, no effect of 2'-FL was observed on 5-FU-induced S-phase arrest in MSIE, AGS, and HT29 cells. Neither pretreatment nor concurrent treatment with 2'-FL affected 5-FU-induced inhibition of proliferation in MSIE cells. CONCLUSIONS This study shows a novel direct effect of 2'-FL in protecting small intestinal epithelial cells against apoptosis stimulated by 5-FU, which may contribute to prevention of 5-FU-induced intestinal mucositis.
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Affiliation(s)
- Gang Zhao
- Department of Pediatrics, Nashville, Tennessee
| | | | - M. Kay Washington
- Department of Pathology, Microbiology and Immunology, Nashville, Tennessee
| | - Yaohua Yang
- Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jirong Long
- Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Fang Yan
- Department of Pediatrics, Nashville, Tennessee,Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee,Correspondence Address correspondence to: Fang Yan, MD, PhD, Department of Pediatrics, Vanderbilt University Medical Center, 2215 Garland Avenue, MRB IV, Room 1035, Nashville, Tennessee 37232-0696. fax: (615) 343-5323.
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11
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Yu Y, Yang W, Bilotta AJ, Zhao X, Cong Y, Li Y. L-lactate promotes intestinal epithelial cell migration to inhibit colitis. FASEB J 2021; 35:e21554. [PMID: 33742715 DOI: 10.1096/fj.202100095r] [Citation(s) in RCA: 3] [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: 01/15/2021] [Revised: 02/24/2021] [Accepted: 03/08/2021] [Indexed: 12/16/2022]
Abstract
Lactate, one of the most common primary metabolites of bacteria and human cells, has been shown to play essential roles in the regulation of inflammatory diseases, including inflammatory bowel diseases. However, whether and how host-derived lactate affects intestinal epithelial homeostasis is still not completely understood. Here, we investigated how L-lactate, mainly produced by host cells, regulates intestinal epithelial cell (IEC) migration to promote intestinal wound healing. Using video microscopy and tracking individual cells, we found that L-lactate enhanced IEC migration in direction persistence and speed. Mechanistically, L-lactate promoted IEC mitochondrial ATP production. The mitochondrial ATP synthase inhibitor, oligomycin, significantly decreased IEC persistence and speed, which inhibited cell migration induced by L-lactate. Furthermore, administering mice with L-lactate suppressed colitis induced by dextran sulfate sodium. In conclusion, our study demonstrates that host-derived L-lactate promotes IEC mitochondrial ATP production to drive cell migration, promoting intestinal wound healing to alleviate intestinal inflammation.
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Affiliation(s)
- Yu Yu
- Department of Gastroenterology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA
| | - Wenjing Yang
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA
| | - Anthony J Bilotta
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA
| | - Xiaojing Zhao
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA
| | - Yingzi Cong
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA
- Department of Pathology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Yanqing Li
- Department of Gastroenterology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
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12
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Du Z, Brown BP, Kim S, Ferguson D, Pavlick DC, Jayakumaran G, Benayed R, Gallant JN, Zhang YK, Yan Y, Red-Brewer M, Ali SM, Schrock AB, Zehir A, Ladanyi M, Smith AW, Meiler J, Lovly CM. Structure-function analysis of oncogenic EGFR Kinase Domain Duplication reveals insights into activation and a potential approach for therapeutic targeting. Nat Commun 2021; 12:1382. [PMID: 33654076 DOI: 10.1038/s41467-021-21613-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 01/28/2021] [Indexed: 02/07/2023] Open
Abstract
Mechanistic understanding of oncogenic variants facilitates the development and optimization of treatment strategies. We recently identified in-frame, tandem duplication of EGFR exons 18 - 25, which causes EGFR Kinase Domain Duplication (EGFR-KDD). Here, we characterize the prevalence of ERBB family KDDs across multiple human cancers and evaluate the functional biochemistry of EGFR-KDD as it relates to pathogenesis and potential therapeutic intervention. We provide computational and experimental evidence that EGFR-KDD functions by forming asymmetric EGF-independent intra-molecular and EGF-dependent inter-molecular dimers. Time-resolved fluorescence microscopy and co-immunoprecipitation reveals EGFR-KDD can form ligand-dependent inter-molecular homo- and hetero-dimers/multimers. Furthermore, we show that inhibition of EGFR-KDD activity is maximally achieved by blocking both intra- and inter-molecular dimerization. Collectively, our findings define a previously unrecognized model of EGFR dimerization, providing important insights for the understanding of EGFR activation mechanisms and informing personalized treatment of patients with tumors harboring EGFR-KDD. Finally, we establish ERBB KDDs as recurrent oncogenic events in multiple cancers. An EGFR mutant with kinase domain duplication (EGFR-KDD) was previously identified in an index patient, but the functional and therapeutic implications remain unclear. Here, the authors show that KDD occurs in other ErbB receptors in multiple cancers, and characterize the mechanism and inhibition of EGFR-KDD.
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13
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Deng Y, McDonald OG, Means AL, Peek RM, Washington MK, Acra SA, Polk DB, Yan F. Exposure to p40 in Early Life Prevents Intestinal Inflammation in Adulthood Through Inducing a Long-Lasting Epigenetic Imprint on TGFβ. Cell Mol Gastroenterol Hepatol 2021; 11:1327-1345. [PMID: 33482393 PMCID: PMC8020481 DOI: 10.1016/j.jcmgh.2021.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 08/03/2020] [Revised: 01/08/2021] [Accepted: 01/11/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND & AIMS Colonization by gut microbiota in early life confers beneficial effects on immunity throughout the host's lifespan. We sought to elucidate the mechanisms whereby neonatal supplementation with p40, a probiotic functional factor, reprograms intestinal epithelial cells for protection against adult-onset intestinal inflammation. METHODS p40 was used to treat young adult mouse colonic (YAMC) epithelial cells with and without deletion of a methyltransferase, su(var)3-9, enhancer-of-zeste and trithorax domain-containing 1β (Setd1β), and mice in early life or in adulthood. Anti-transforming growth factor β (TGFβ)-neutralizing antibodies were administered to adult mice with and without colitis induced by 2,4,6-trinitrobenzenesulfonic acid or dextran sulfate sodium. We examined Setd1b and Tgfb gene expression, TGFβ production, monomethylation and trimethylation of histone H3 on the lysine 4 residue (H3K4me1/3), H3K4me3 enrichment in Tgfb promoter, differentiation of regulatory T cells (Tregs), and the inflammatory status. RESULTS p40 up-regulated expression of Setd1b in YAMC cells. Accordingly, p40 enhanced H3K4me1/3 in YAMC cells in a Setd1β-dependent manner. p40-regulated Setd1β mediated programming the TGFβ locus into a transcriptionally permissive chromatin state and promoting TGFβ production in YAMC. Furthermore, transient exposure to p40 during the neonatal period and in adulthood resulted in the immediate increase in Tgfb gene expression. However, only neonatal p40 supplementation induced the sustained H3K4me1/3 and Tgfb gene expression that persisted into adulthood. Interfering with TGFβ function by neutralizing antibodies diminished the long-lasting effects of neonatal p40 supplementation on differentiation of Tregs and protection against colitis in adult mice. CONCLUSIONS Exposure to p40 in early life enables an epigenetic imprint on TGFβ, leading to long-lasting production of TGFβ by intestinal epithelial cells to expand Tregs and protect the gut against inflammation.
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Affiliation(s)
- Yilin Deng
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Oliver G McDonald
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee; Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Anna L Means
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Richard M Peek
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - M Kay Washington
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Sari A Acra
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - D Brent Polk
- Department of Pediatrics, Keck School of Medicine of University of Southern California, Los Angeles, California; Department of Biochemistry and Molecular Medicine, Keck School of Medicine of University of Southern California, Los Angeles, California; Division of Gastroenterology, Hepatology and Nutrition, Children's Hospital Los Angeles, Los Angeles, California
| | - Fang Yan
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee.
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14
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Ren B, Schmid M, Scheiner M, Mollenkopf HJ, Lucius R, Heitlinger E, Gupta N. Toxoplasma and Eimeria co-opt the host cFos expression for intracellular development in mammalian cells. Comput Struct Biotechnol J 2021; 19:719-731. [PMID: 33510872 PMCID: PMC7817532 DOI: 10.1016/j.csbj.2020.12.045] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 12/30/2020] [Accepted: 12/31/2020] [Indexed: 12/05/2022] Open
Abstract
Gene expression profiles differ significantly between Toxoplasma and Eimeria-infected host cells. Several distinct and shared host-signaling cascades are regulated by coccidian parasites. cFos is one of the few host transcripts mutually regulated during infection by both pathogens. Host cFos is required for optimal in vitro development of E. falciformis and T. gondii. Transcriptomics of parasitized wild-type and cFos-/- host cells reveals a perturbation of cFos network.
Successful asexual reproduction of intracellular pathogens depends on their potential to exploit host resources and subvert antimicrobial defense. In this work, we deployed two prevalent apicomplexan parasites of mammalian cells, namely Toxoplasma gondii and Eimeria falciformis, to identify potential host determinants of infection. Expression analyses of the young adult mouse colonic (YAMC) epithelial cells upon infection by either parasite showed regulation of several distinct transcripts, indicating that these two pathogens program their intracellular niches in a tailored manner. Conversely, parasitized mouse embryonic fibroblasts (MEFs) displayed a divergent transcriptome compared to corresponding YAMC epithelial cells, suggesting that individual host cells mount a fairly discrete response when encountering a particular pathogen. Among several host transcripts similarly altered by T. gondii and E. falciformis, we identified cFos, a master transcription factor, that was consistently induced throughout the infection. Indeed, asexual growth of both parasites was strongly impaired in MEF host cells lacking cFos expression. Last but not the least, our differential transcriptomics of the infected MEFs (parental and cFos-/- mutant) and YAMC epithelial cells disclosed a cFos-centered network, underlying signal cascades, as well as a repertoire of nucleotides- and ion-binding proteins, which presumably act in consort to acclimatize the mammalian cell and thereby facilitate the parasite development.
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Affiliation(s)
- Bingjian Ren
- Department of Molecular Parasitology, Institute of Biology, Humboldt University, Berlin, Germany
| | - Manuela Schmid
- Department of Molecular Parasitology, Institute of Biology, Humboldt University, Berlin, Germany
| | - Mattea Scheiner
- Department of Molecular Parasitology, Institute of Biology, Humboldt University, Berlin, Germany
| | - Hans-Joachim Mollenkopf
- Microarray and Genomics Core Facility, Max-Planck Institute for Infection Biology, Berlin, Germany
| | - Richard Lucius
- Department of Molecular Parasitology, Institute of Biology, Humboldt University, Berlin, Germany
| | - Emanuel Heitlinger
- Department of Molecular Parasitology, Institute of Biology, Humboldt University, Berlin, Germany.,Research Group Ecology and Evolution of Parasite Host Interactions, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Nishith Gupta
- Department of Molecular Parasitology, Institute of Biology, Humboldt University, Berlin, Germany.,Department of Biological Sciences, Birla Institute of Technology and Science Pilani (BITS-P), Hyderabad, India
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15
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Bulek K, Zhao J, Liao Y, Rana N, Corridoni D, Antanaviciute A, Chen X, Wang H, Qian W, Miller-Little WA, Swaidani S, Tang F, Willard BB, McCrae K, Kang Z, Dubyak GR, Cominelli F, Simmons A, Pizarro TT, Li X. Epithelial-derived gasdermin D mediates nonlytic IL-1β release during experimental colitis. J Clin Invest 2020; 130:4218-4234. [PMID: 32597834 PMCID: PMC7410065 DOI: 10.1172/jci138103] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [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: 03/13/2020] [Accepted: 04/29/2020] [Indexed: 12/16/2022] Open
Abstract
Gasdermin D (GSDMD) induces pyroptosis via the pore-forming activity of its N-terminal domain, cleaved by activated caspases associated with the release of IL-1β. Here, we report a nonpyroptotic role of full-length GSDMD in guiding the release of IL-1β-containing small extracellular vesicles (sEVs) from intestinal epithelial cells (IECs). In response to caspase-8 inflammasome activation, GSDMD, chaperoned by Cdc37/Hsp90, recruits the E3 ligase, NEDD4, to catalyze polyubiquitination of pro-IL-1β, serving as a signal for cargo loading into secretory vesicles. GSDMD and IL-1β colocalize with the exosome markers CD63 and ALIX intracellularly, and GSDMD and NEDD4 are required for release of CD63+ sEVs containing IL-1β, GSDMD, NEDD4, and caspase-8. Importantly, increased expression of epithelial-derived GSDMD is observed both in patients with inflammatory bowel disease (IBD) and those with experimental colitis. While GSDMD-dependent release of IL-1β-containing sEVs is detected in cultured colonic explants from colitic mice, GSDMD deficiency substantially attenuates disease severity, implicating GSDMD-mediated release of IL-1β sEVs in the pathogenesis of intestinal inflammation, such as that observed in IBD.
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Affiliation(s)
- Katarzyna Bulek
- Department of Inflammation and Immunity, Cleveland Clinic, Lerner Research Institute, Cleveland, Ohio, USA
- Department of Immunology, Faculty of Biochemistry, Biophysics, and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Junjie Zhao
- Department of Inflammation and Immunity, Cleveland Clinic, Lerner Research Institute, Cleveland, Ohio, USA
| | - Yun Liao
- Department of Inflammation and Immunity, Cleveland Clinic, Lerner Research Institute, Cleveland, Ohio, USA
| | - Nitish Rana
- Department of Pathology and
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Daniele Corridoni
- Medical Research Counsel (MRC) Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Agne Antanaviciute
- Medical Research Counsel (MRC) Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Xing Chen
- Department of Inflammation and Immunity, Cleveland Clinic, Lerner Research Institute, Cleveland, Ohio, USA
| | - Han Wang
- Department of Inflammation and Immunity, Cleveland Clinic, Lerner Research Institute, Cleveland, Ohio, USA
| | - Wen Qian
- Department of Inflammation and Immunity, Cleveland Clinic, Lerner Research Institute, Cleveland, Ohio, USA
| | - William A. Miller-Little
- Department of Inflammation and Immunity, Cleveland Clinic, Lerner Research Institute, Cleveland, Ohio, USA
- Department of Pathology and
| | | | - Fangqiang Tang
- Department of Inflammation and Immunity, Cleveland Clinic, Lerner Research Institute, Cleveland, Ohio, USA
| | - Belinda B. Willard
- Proteomics and Metabolomics Core, Cleveland Clinic, Lerner Research Institute, Cleveland, Ohio, USA
| | - Keith McCrae
- Department of Cardiovascular and Metabolic Sciences and
| | - Zizhen Kang
- Department of Inflammation and Immunity, Cleveland Clinic, Lerner Research Institute, Cleveland, Ohio, USA
| | - George R. Dubyak
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Fabio Cominelli
- Department of Pathology and
- Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
- Digestive Health Institute, University Hospitals of Cleveland, Cleveland, Ohio, USA
| | - Alison Simmons
- Medical Research Counsel (MRC) Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Theresa T. Pizarro
- Department of Pathology and
- Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Xiaoxia Li
- Department of Inflammation and Immunity, Cleveland Clinic, Lerner Research Institute, Cleveland, Ohio, USA
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16
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Matsumoto Y, Matsuya Y, Nagai K, Amagase K, Saeki K, Matsumoto K, Yokomizo T, Kato S. Leukotriene B 4 Receptor Type 2 Accelerates the Healing of Intestinal Lesions by Promoting Epithelial Cell Proliferation. J Pharmacol Exp Ther 2020; 373:1-9. [PMID: 31941716 DOI: 10.1124/jpet.119.263145] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 01/02/2020] [Indexed: 12/19/2022] Open
Abstract
Leukotriene B4 receptor type 2 (BLT2) is a low-affinity leukotriene B4 receptor that is highly expressed in intestinal epithelial cells. Previous studies demonstrated the protective role of BLT2 in experimentally induced colitis. However, its role in intestinal lesion repair is not fully understood. We investigated the role of BLT2 in the healing of indomethacin-induced intestinal lesions in mice. There was no significant different between wild-type (WT) and BLT2-deficient (BLT2KO) mice in terms of the development of indomethacin-induced intestinal lesions. However, healing of these lesions was significantly impaired in BLT2KO mice compared with WT mice. In contrast, transgenic mice with intestinal epithelium-specific BLT2 overexpression presented with superior ileal lesion healing relative to WT mice. An immunohistochemical study showed that the number of Ki-67-proliferative cells was markedly increased during the healing of intestinal lesions in WT mice but significantly attenuated in BLT2KO mice. Exposure of cultured mouse intestinal epithelial cells to CAY10583, a BLT2 agonist, promoted wound healing and cell proliferation in a concentration-dependent manner. Nevertheless, these responses were abolished under serum-free conditions. The CAY10583-induced proliferative effect was also negated by Go6983, a protein kinase C (PKC) inhibitor, U-73122, a phospholipase C (PLC) inhibitor, LY255283, a BLT2 antagonist, and pertussis toxin that inhibits G protein-coupled receptor signaling via Gi/o proteins. Thus, BLT2 plays an important role in intestinal wound repair. Moreover, this effect is mediated by the promotion of epithelial cell proliferation via the Gi/o protein-dependent and PLC/PKC signaling pathways. The BLT2 agonists are potential therapeutic agents for the treatment of intestinal lesions. SIGNIFICANCE STATEMENT: The healing of indomethacin-induced Crohn's disease-like intestinal lesions was impaired in mice deficient in low-affinity leukotriene B4 receptor type 2 (BLT2). They presented with reduced epithelial cell proliferation during the healing. In contrast, healing was promoted in mice overexpressing intestinal epithelial BLT2. In cultured intestinal epithelial cells, the BLT2 agonist CAY10583 substantially accelerated wound repair by enhancing cell proliferation rather than migration. Thus, BLT2 plays an important role in the intestinal lesions via acceleration of epithelial cell proliferation.
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Affiliation(s)
- Yui Matsumoto
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan (Yui.M, Yuk.M., K.N., K.A., K.M., S.K.); Laboratory of Pharmacology and Pharmacotherapy, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan (K.A.); and Department of Biochemistry, Juntendo University Graduate School of Medicine, Tokyo, Japan (K.S., T.Y.)
| | - Yukiko Matsuya
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan (Yui.M, Yuk.M., K.N., K.A., K.M., S.K.); Laboratory of Pharmacology and Pharmacotherapy, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan (K.A.); and Department of Biochemistry, Juntendo University Graduate School of Medicine, Tokyo, Japan (K.S., T.Y.)
| | - Kano Nagai
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan (Yui.M, Yuk.M., K.N., K.A., K.M., S.K.); Laboratory of Pharmacology and Pharmacotherapy, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan (K.A.); and Department of Biochemistry, Juntendo University Graduate School of Medicine, Tokyo, Japan (K.S., T.Y.)
| | - Kikuko Amagase
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan (Yui.M, Yuk.M., K.N., K.A., K.M., S.K.); Laboratory of Pharmacology and Pharmacotherapy, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan (K.A.); and Department of Biochemistry, Juntendo University Graduate School of Medicine, Tokyo, Japan (K.S., T.Y.)
| | - Kazuko Saeki
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan (Yui.M, Yuk.M., K.N., K.A., K.M., S.K.); Laboratory of Pharmacology and Pharmacotherapy, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan (K.A.); and Department of Biochemistry, Juntendo University Graduate School of Medicine, Tokyo, Japan (K.S., T.Y.)
| | - Kenjiro Matsumoto
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan (Yui.M, Yuk.M., K.N., K.A., K.M., S.K.); Laboratory of Pharmacology and Pharmacotherapy, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan (K.A.); and Department of Biochemistry, Juntendo University Graduate School of Medicine, Tokyo, Japan (K.S., T.Y.)
| | - Takehiko Yokomizo
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan (Yui.M, Yuk.M., K.N., K.A., K.M., S.K.); Laboratory of Pharmacology and Pharmacotherapy, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan (K.A.); and Department of Biochemistry, Juntendo University Graduate School of Medicine, Tokyo, Japan (K.S., T.Y.)
| | - Shinichi Kato
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan (Yui.M, Yuk.M., K.N., K.A., K.M., S.K.); Laboratory of Pharmacology and Pharmacotherapy, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, Japan (K.A.); and Department of Biochemistry, Juntendo University Graduate School of Medicine, Tokyo, Japan (K.S., T.Y.)
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17
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Liu F, Wang X, Geng H, Bu HF, Wang P, De Plaen IG, Yang H, Qian J, Tan XD. Interferon-γ inhibits sirtuin 6 gene expression in intestinal epithelial cells through a microRNA-92b-dependent mechanism. Am J Physiol Cell Physiol 2020; 318:C732-C739. [PMID: 32049548 DOI: 10.1152/ajpcell.00335.2019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 11/22/2022]
Abstract
Sirtuin 6 (Sirt6) is predominantly expressed in epithelial cells in intestinal crypts. It plays an important role in protecting intestinal epithelial cells against inflammatory injury. Previously, we found that colitis is associated with the downregulation of Sirt6 protein in the intestines. Here, we report that murine interferon-γ (Ifnγ) inhibits Sirt6 protein but not mRNA expression in young adult mouse colonocytes (YAMC, a mouse colonic epithelial cell line) in a dose- and time-dependent manner. Using microRNA array analysis, we showed that Ifnγ induces expression of miR-92b in YAMC cells. With in silico analysis, we found that the Sirt6 3'-untranslated region (UTR) contains a putative binding site for miR-92b. Luciferase assay showed that Ifnγ inhibited Sirt6 3'-UTR activity and this effect was mimicked by miR-92b via directly targeting the miR-92b seed site in the 3'-UTR of Sirt6 mRNA. Furthermore, Western blot demonstrated that miR-92b downregulated Sirt6 protein expression in YAMC cells. Blocking miR-92b with a specific inhibitor attenuated the inhibitory effect of Ifnγ on Sirt6 protein expression in the cells. Collectively, our data suggest that Ifnγ inhibits Sirt6 protein expression in intestinal epithelial cells via a miR-92b-mediated mechanism. miR-92b may be a novel therapeutic target for rescuing Sirt6 protein levels in intestinal epithelial cells, thereby protecting against intestinal mucosal injury caused by inflammation.
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Affiliation(s)
- Fangyi Liu
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois.,Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China
| | - Xiao Wang
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Hua Geng
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Heng-Fu Bu
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Peng Wang
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Isabelle G De Plaen
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois.,Division of Neonatology, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
| | - Hong Yang
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China
| | - Jiaming Qian
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China
| | - Xiao-Di Tan
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Center for Intestinal and Liver Inflammation Research, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois.,Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
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18
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Yang L, Higginbotham JN, Liu L, Zhao G, Acra SA, Peek RM Jr, Polk DB, Li H, Yan F. Production of a Functional Factor, p40, by Lactobacillus rhamnosus GG Is Promoted by Intestinal Epithelial Cell-Secreted Extracellular Vesicles. Infect Immun 2019; 87:e00113-19. [PMID: 31010817 DOI: 10.1128/IAI.00113-19] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 04/09/2019] [Indexed: 12/15/2022] Open
Abstract
The symbiotic relationship between the gut microbiome and the host provides a nutrient-rich environment for gut microbes and has beneficial effects on host health. Although the composition of the gut microbiome is known to be influenced by both host genetics and environmental factors, host effects on the activities and functions of the gut microbial communities remain poorly understood. Intestinal epithelial cells exert front-line responses to gut microbes and contribute to maintaining a healthy intestinal homeostasis. Here, seeking to elucidate whether intestinal epithelial cells modulate Lactobacillus rhamnosus GG (LGG) functions, we examined the production of p40, an LGG-derived secretory protein that protects intestinal epithelial cells against inflammation. We found that growth medium conditioned with colonic epithelial cell-derived components promotes p40 protein synthesis and secretion by LGG and enhances LGG-stimulated protective responses in intestinal epithelial cells. Furthermore, when LGG was cultured with the colonic luminal contents from healthy mice, p40 production was upregulated but was attenuated with luminal contents from mice with intestinal inflammation. Importantly, the colonic epithelial cell-derived components potentiated LGG-produced p40 levels in a mouse model of colitis and enhanced LGG-mediated amelioration of intestinal inflammation in this model. Notably, we found that colonic epithelial cell-secreted extracellular vesicles participate in communicating with LGG and that heat shock protein 90 (HSP90) in these vesicles might mediate the promotion of p40 production. These results reveal a previously unrecognized mechanism by which the anti-inflammatory effect of LGG is reinforced by intestinal epithelial cells and thereby maintains intestinal health.
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19
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Torreggiani E, Rossini M, Bononi I, Pietrobon S, Mazzoni E, Iaquinta MR, Feo C, Rotondo JC, Rizzo P, Tognon M, Martini F. Protocol for the long-term culture of human primary keratinocytes from the normal colorectal mucosa. J Cell Physiol 2019; 234:9895-9905. [PMID: 30740692 DOI: 10.1002/jcp.28300] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 05/11/2018] [Revised: 12/19/2018] [Accepted: 12/20/2018] [Indexed: 12/30/2022]
Abstract
Procedures for in vitro culturing of human primary keratinocytes from normal colon mucosa specimens have not been fully feasible, thus far. The protocol described herein allows primary keratinocytes from small tissue fragments of colorectal mucosa biopsies to grow in vitro. The procedure develops in three steps: (a) the enzymatic digestion of the tissue biopsy; (b) the use of cloning rings to purify primary keratinocyte colonies, (c) a defined keratinocyte medium to grow these cells in long-term culture. Our cultural method enables normal primary keratinocytes to be obtained by simple and rapid techniques. In our culture condition, primary keratinocytes express specific epithelial markers. Colorectal mucosa keratinocyte colonies require approximately 2 weeks to grow. Compared with previous approaches, our protocol provides a valuable model of study for human primary keratinocytes from normal colorectal (NCR) mucosa both at the cellular and molecular levels. It is well known, that different mutations occurring during the multistep process of carcinogenesis in the NCR mucosa, are strictly associated to the onset/progression of the colorectal carcinoma. On this ground, normal keratinocytes grown with our protocol, may represent an innovative tool to investigate the mechanisms that lead to colorectal carcinoma and other diseases. Our innovative procedure may allow to perform comparative investigations between normal and pathological colorectal cells.
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Affiliation(s)
- Elena Torreggiani
- Laboratories of Cell Biology and Molecular Genetics, Section of Pathology, Oncology, and Experimental Biology, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Marika Rossini
- Laboratories of Cell Biology and Molecular Genetics, Section of Pathology, Oncology, and Experimental Biology, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Ilaria Bononi
- Laboratories of Cell Biology and Molecular Genetics, Section of Pathology, Oncology, and Experimental Biology, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Silvia Pietrobon
- Laboratories of Cell Biology and Molecular Genetics, Section of Pathology, Oncology, and Experimental Biology, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Elisa Mazzoni
- Laboratories of Cell Biology and Molecular Genetics, Section of Pathology, Oncology, and Experimental Biology, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Maria Rosa Iaquinta
- Laboratories of Cell Biology and Molecular Genetics, Section of Pathology, Oncology, and Experimental Biology, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Carlo Feo
- Section of Clinical Surgery, Department of Morphology, Surgery, and Experimental Medicine, School of Medicine, University of Ferrara, Ferrara, Italy
| | - John Charles Rotondo
- Laboratories of Cell Biology and Molecular Genetics, Section of Pathology, Oncology, and Experimental Biology, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Paola Rizzo
- Laboratories of Cell Biology and Molecular Genetics, Section of Pathology, Oncology, and Experimental Biology, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Mauro Tognon
- Laboratories of Cell Biology and Molecular Genetics, Section of Pathology, Oncology, and Experimental Biology, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Fernanda Martini
- Laboratories of Cell Biology and Molecular Genetics, Section of Pathology, Oncology, and Experimental Biology, School of Medicine, University of Ferrara, Ferrara, Italy
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20
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Liu Y, Patel GC, Mao W, Clark AF. Establishment of a conditionally immortalized mouse optic nerve astrocyte line. Exp Eye Res 2018; 176:188-195. [PMID: 30006274 PMCID: PMC6215719 DOI: 10.1016/j.exer.2018.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 03/02/2018] [Revised: 07/06/2018] [Accepted: 07/08/2018] [Indexed: 11/24/2022]
Abstract
Optic nerve astrocytes play a major role in axonal degeneration and regeneration. Astrocyte lines are an important tool to elucidate the responsible cellular mechanisms. In this study, we established a conditionally immortalized mouse optic nerve astrocyte line. Astrocytes were cultured from explants derived from postnatal day 4-5 H-2kb-tsA58 transgenic mouse optic nerves. Cells were cultured in defined astrocyte culture medium under permissive (33 °C) or non-permissive (38.5 °C) temperatures with or without interferon-ɤ (IFN-ɤ). Astrocytes were characterized by immunocytochemistry staining using antibodies against glial fibrillary acidic protein (GFAP) and neural cell adhesion molecule (NCAM). Cell proliferation rates were determined by cell growth curves and percentage of Ki67 positive cells. Karyotyping was performed to validate the mouse origin of established cell line. Conditional immortalization was assessed by western blot-determined expression levels of SV40 large T antigen (TAg), p53, GFAP and NCAM in non-permissive culture conditions. In addition, phagocytic activity of immortalized cells was determined by flow cytometry-based pHrodo fluorescence analysis. After 5 days in culture, cells migrated out from optic nerve explants. Immunocytochemistry staining showed that migrating cells expressed astrocyte makers, GFAP and NCAM. In permissive conditions, astrocytes had increased expression levels of TAg and p53, exhibited a greater cell proliferation rate as well as a higher percentage of Ki67 positive cells (n = 3, p < 0.05) compared to cells cultured in non-permissive conditions. One cell line (ImB1ON) was further maintained through 60 generations. Karyotyping showed that ImB1ON was of mouse origin. Flow cytometry-based pHrodo fluorescence analysis demonstrated phagocytic activity of ImB1ON cells. Quantitative PCR showed mRNA expression of trophic factors. Non-permissive culture conditions decreased expression of TAg and p53 in ImB1ON, and increased the expression of NCAM. A conditionally immortalized mouse optic nerve astrocyte line was established. This cell line provides an important tool to study astrocyte biological processes.
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Affiliation(s)
- Yang Liu
- North Texas Eye Research Institute, Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, TX, United States.
| | - Gaurang C Patel
- North Texas Eye Research Institute, Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, TX, United States
| | - Weiming Mao
- North Texas Eye Research Institute, Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, TX, United States
| | - Abbot F Clark
- North Texas Eye Research Institute, Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, TX, United States
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21
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Means AL, Freeman TJ, Zhu J, Woodbury LG, Marincola-Smith P, Wu C, Meyer AR, Weaver CJ, Padmanabhan C, An H, Zi J, Wessinger BC, Chaturvedi R, Brown TD, Deane NG, Coffey RJ, Wilson KT, Smith JJ, Sawyers CL, Goldenring JR, Novitskiy SV, Washington MK, Shi C, Beauchamp RD. Epithelial Smad4 Deletion Up-Regulates Inflammation and Promotes Inflammation-Associated Cancer. Cell Mol Gastroenterol Hepatol 2018; 6:257-276. [PMID: 30109253 PMCID: PMC6083016 DOI: 10.1016/j.jcmgh.2018.05.006] [Citation(s) in RCA: 42] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 05/18/2018] [Indexed: 02/08/2023]
Abstract
Background & Aims Chronic inflammation is a predisposing condition for colorectal cancer. Many studies to date have focused on proinflammatory signaling pathways in the colon. Understanding the mechanisms that suppress inflammation, particularly in epithelial cells, is critical for developing therapeutic interventions. Here, we explored the roles of transforming growth factor β (TGFβ) family signaling through SMAD4 in colonic epithelial cells. Methods The Smad4 gene was deleted specifically in adult murine intestinal epithelium. Colitis was induced by 3 rounds of dextran sodium sulfate in drinking water, after which mice were observed for up to 3 months. Nontransformed mouse colonocyte cell lines and colonoid cultures and human colorectal cancer cell lines were analyzed for responses to TGFβ1 and bone morphogenetic protein 2. Results Dextran sodium sulfate treatment was sufficient to drive carcinogenesis in mice lacking colonic Smad4 expression, with resulting tumors bearing striking resemblance to human colitis-associated carcinoma. Loss of SMAD4 protein was observed in 48% of human colitis-associated carcinoma samples as compared with 19% of sporadic colorectal carcinomas. Loss of Smad4 increased the expression of inflammatory mediators within nontransformed mouse colon epithelial cells in vivo. In vitro analysis of mouse and human colonic epithelial cell lines and organoids indicated that much of this regulation was cell autonomous. Furthermore, TGFβ signaling inhibited the epithelial inflammatory response to proinflammatory cytokines. Conclusions TGFβ suppresses the expression of proinflammatory genes in the colon epithelium, and loss of its downstream mediator, SMAD4, is sufficient to initiate inflammation-driven colon cancer. Transcript profiling: GSE100082.
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Key Words
- AOM, azoxymethane
- APC, adenomatous polyposis coli
- BMP, bone morphogenetic protein
- CAC, colitis-associated carcinoma
- CCL20, Chemokine (C-C motif) ligand 20
- CRC, colorectal cancer
- CRISPR/Cas9, Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR-associated protein 9
- Colitis-Associated Carcinoma
- DMEM, Dulbecco's modified Eagle medium
- DSS, dextran sodium sulfate
- FBS, fetal bovine serum
- FDR, false discovery rate
- GFP, green fluorescent protein
- HBSS, Hank's balanced salt solution
- IBD, inflammatory bowel disease
- IL, interleukin
- IMCS4fl/fl, immortalized mouse colonoctye cell line with loxP-flanked Smad4 alleles
- IMCS4null, immortalized mouse colonocyte cell line with deletion of the Smad4 alleles
- LPS, lipopolysaccharide
- PBS, phosphate-buffered saline
- PE, phycoerythrin
- R-SMAD, Receptor-SMAD
- SFG, retroviral vector
- STAT3, signal transducer and activator of transcription 3
- TGFβ
- TGFβ, transforming growth factor β
- TNF, tumor necrosis factor
- Tumor Necrosis Factor
- UC, ulcerative colitis
- WNT, wingless-type mouse mammary tumor virus integration site
- YAMC, young adult mouse colon epithelial cells
- mRNA, messenger RNA
- sgRNA, single-guide RNA
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Affiliation(s)
- Anna L. Means
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Tanner J. Freeman
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jing Zhu
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Luke G. Woodbury
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Chao Wu
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Anne R. Meyer
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Connie J. Weaver
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Hanbing An
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jinghuan Zi
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Bronson C. Wessinger
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Rupesh Chaturvedi
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Tasia D. Brown
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Natasha G. Deane
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Robert J. Coffey
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee
| | - Keith T. Wilson
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee
| | - J. Joshua Smith
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Charles L. Sawyers
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - James R. Goldenring
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee
| | - Sergey V. Novitskiy
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - M. Kay Washington
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Chanjuan Shi
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - R. Daniel Beauchamp
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
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22
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Horii Y, Uchiyama K, Toyokawa Y, Hotta Y, Tanaka M, Yasukawa Z, Tokunaga M, Okubo T, Mizushima K, Higashimura Y, Dohi O, Okayama T, Yoshida N, Katada K, Kamada K, Handa O, Ishikawa T, Takagi T, Konishi H, Naito Y, Itoh Y. Partially hydrolyzed guar gum enhances colonic epithelial wound healing via activation of RhoA and ERK1/2. Food Funct 2018; 7:3176-83. [PMID: 27305660 DOI: 10.1039/c6fo00177g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS Healing of the intestinal mucosal epithelium was found to be a critical factor in the treatment of inflammatory bowel disease (IBD). In this study, we provide further evidence that partially hydrolyzed dietary fiber (PHGG) enhances colonic epithelial cell wound healing, and partially characterize the mechanism that governs this process. MATERIALS AND METHODS Young adult mouse colonic (YAMC) epithelial cells were scraped with a 10 μl micro-pipette tip to denude a round of the monolayer and were incubated with PHGG. The area of cell migration was measured using Image J software. Meanwhile, Rho activation assays were utilized to monitor Rho activation levels. To assess in vivo effects, C57B6 mice were treated with DSS for 7 days and then provided food supplemented with PHGG for 8 days. RESULTS YAMC cells treated with PHGG exhibited significantly enhanced wound healing compared to the control cells; however, this enhancement was inhibited by both Y-27632 (RhoA inhibitor) and U0126 (ERK1/2 inhibitor). Likewise, there was a PHGG-dependent increase in F-actin accumulation and Rho kinase activity that was blocked by U0126. Meanwhile, PHGG-dependent ERK1/2 activity was not inhibited by Y-27632. In the DSS-induced mouse colitis model, animals that received food supplemented with PHGG exhibited significant recovery of the colonic mucosa. CONCLUSIONS In this study, we demonstrate that PHGG promotes colonic epithelial cell wound healing via activation of RhoA, which occurs downstream of ERK1/2 activation. These findings indicate that PHGG could be utilized as a therapeutic agent for patients with intestinal mucosal damage such as those with IBD.
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Affiliation(s)
- Yusuke Horii
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Kazuhiko Uchiyama
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Yuki Toyokawa
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Yuma Hotta
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Makoto Tanaka
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Zenta Yasukawa
- Nutrition Division, Taiyo Kagaku Co. Ltd, Yokkaichi, Mie, Japan
| | - Makoto Tokunaga
- Nutrition Division, Taiyo Kagaku Co. Ltd, Yokkaichi, Mie, Japan
| | - Tsutomu Okubo
- Nutrition Division, Taiyo Kagaku Co. Ltd, Yokkaichi, Mie, Japan
| | - Katsura Mizushima
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Yasuki Higashimura
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Osamu Dohi
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Tetsuya Okayama
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Naohisa Yoshida
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Kazuhiro Katada
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Kazuhiro Kamada
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Osamu Handa
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Takeshi Ishikawa
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Tomohisa Takagi
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Hideyuki Konishi
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Yuji Naito
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Yoshito Itoh
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
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23
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Peng Y, Song L, Li D, Kesterson R, Wang J, Wang L, Rokosh G, Wu B, Wang Q, Jiao K. Sema6D acts downstream of bone morphogenetic protein signalling to promote atrioventricular cushion development in mice. Cardiovasc Res 2018; 112:532-542. [PMID: 28172500 DOI: 10.1093/cvr/cvw200] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 08/10/2016] [Accepted: 08/18/2016] [Indexed: 12/11/2022] Open
Affiliation(s)
- Yin Peng
- Department of Genetics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Lanying Song
- Department of Genetics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Ding Li
- Department of Cell, Developmental and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Robert Kesterson
- Department of Genetics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Jianbo Wang
- Department of Cell, Developmental and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Lizhong Wang
- Department of Genetics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Gregg Rokosh
- Division of Cardiovascular Disease, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Bingruo Wu
- Department of Genetics, Albert Einstein College of Medicine, New York, NY 10461, USA
| | - Qin Wang
- Department of Cell, Developmental and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Kai Jiao
- Department of Genetics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
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24
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Abstract
The microvascular pericyte was identified in 1873 by the French scientist Charles Benjamin Rouget and originally called the Rouget cell (Rouget.Sciences 88:916-8, 1879). However, it was not until the early 1900s that Rouget's work was confirmed, and the Rouget cell renamed the pericyte by virtue of its peri-endothelial location (Dore. Brit J Dermatol 35:398-404, 1923; Zimmermann. Z Anat Entwicklungsgesch 68:3-109, 1923). Over the years a large number of publications have emerged, but the pericyte has remained a truly enigmatic cell. This is due, in part, by the paucity of easy and reliable methods to isolate and characterize the cell as well as its heterogeneity and pluripotent characteristics. However, more recent advances in molecular genetics and development of novel cell isolation and imaging techniques have enable scientists to more readily define pericyte function. This chapter will discuss general approaches to the isolation, characterization, and propagation of primary pericytes in the establishment of cell lines. We will attempt to dispel misinterpretations about the pericyte that cloud the literature.
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Affiliation(s)
- Paula Dore-Duffy
- Department of Neurology, School of Medicine, Wayne State University, Detroit, MI, USA.
| | - Nilufer Esen
- Department of Neurology, School of Medicine, Wayne State University, Detroit, MI, USA
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25
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Goldspink DA, Matthews ZJ, Lund EK, Wileman T, Mogensen MM. Immuno-fluorescent Labeling of Microtubules and Centrosomal Proteins in Ex Vivo Intestinal Tissue and 3D In Vitro Intestinal Organoids. J Vis Exp 2017. [PMID: 29286416 PMCID: PMC5755565 DOI: 10.3791/56662] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The advent of 3D in vitro organoids that mimic the in vivo tissue architecture and morphogenesis has greatly advanced the ability to study key biological questions in cell and developmental biology. In addition, organoids together with recent technical advances in gene editing and viral gene delivery promises to advance medical research and development of new drugs for treatment of diseases. Organoids grown in vitro in basement matrix provide powerful model systems for studying the behavior and function of various proteins and are well suited for live-imaging of fluorescent-tagged proteins. However, establishing the expression and localization of the endogenous proteins in ex vivo tissue and in in vitro organoids is important to verify the behavior of the tagged proteins. To this end we have developed and modified tissue isolation, fixation, and immuno-labeling protocols for localization of microtubules, centrosomal, and associated proteins in ex vivo intestinal tissue and in in vitro intestinal organoids. The aim was for the fixative to preserve the 3D architecture of the organoids/tissue while also preserving antibody antigenicity and enabling good penetration and clearance of fixative and antibodies. Exposure to cold depolymerizes all but stable microtubules and this was a key factor when modifying the various protocols. We found that increasing the ethylenediaminetetraacetic acid (EDTA) concentration from 3 mM to 30 mM gave efficient detachment of villi and crypts in the small intestine while 3 mM EDTA was sufficient for colonic crypts. The developed formaldehyde/methanol fixation protocol gave very good structural preservation while also preserving antigenicity for effective labeling of microtubules, actin, and the end-binding (EB) proteins. It also worked for the centrosomal protein ninein although the methanol protocol worked more consistently. We further established that fixation and immuno-labeling of microtubules and associated proteins could be achieved with organoids isolated from or remaining within the basement matrix.
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Affiliation(s)
| | | | | | - Tom Wileman
- Norwich Medical School, University of East Anglia
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26
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Goldspink DA, Rookyard C, Tyrrell BJ, Gadsby J, Perkins J, Lund EK, Galjart N, Thomas P, Wileman T, Mogensen MM. Ninein is essential for apico-basal microtubule formation and CLIP-170 facilitates its redeployment to non-centrosomal microtubule organizing centres. Open Biol 2017; 7:rsob.160274. [PMID: 28179500 PMCID: PMC5356440 DOI: 10.1098/rsob.160274] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [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: 09/29/2016] [Accepted: 01/17/2017] [Indexed: 01/08/2023] Open
Abstract
Differentiation of columnar epithelial cells involves a dramatic reorganization of the microtubules (MTs) and centrosomal components into an apico-basal array no longer anchored at the centrosome. Instead, the minus-ends of the MTs become anchored at apical non-centrosomal microtubule organizing centres (n-MTOCs). Formation of n-MTOCs is critical as they determine the spatial organization of MTs, which in turn influences cell shape and function. However, how they are formed is poorly understood. We have previously shown that the centrosomal anchoring protein ninein is released from the centrosome, moves in a microtubule-dependent manner and accumulates at n-MTOCs during epithelial differentiation. Here, we report using depletion and knockout (KO) approaches that ninein expression is essential for apico-basal array formation and epithelial elongation and that CLIP-170 is required for its redeployment to n-MTOCs. Functional inhibition also revealed that IQGAP1 and active Rac1 coordinate with CLIP-170 to facilitate microtubule plus-end cortical targeting and ninein redeployment. Intestinal tissue and in vitro organoids from the Clip1/Clip2 double KO mouse with deletions in the genes encoding CLIP-170 and CLIP-115, respectively, confirmed requirement of CLIP-170 for ninein recruitment to n-MTOCs, with possible compensation by other anchoring factors such as p150Glued and CAMSAP2 ensuring apico-basal microtubule formation despite loss of ninein at n-MTOCs.
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Affiliation(s)
| | - Chris Rookyard
- School of Computing Science, University of East Anglia, Norwich, UK
| | | | - Jonathan Gadsby
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - James Perkins
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Elizabeth K Lund
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Niels Galjart
- Department of Cell Biology and Genetics, Erasmus MC, Rotterdam, The Netherlands
| | - Paul Thomas
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Tom Wileman
- Medical School, University of East Anglia, Norwich, UK
| | - Mette M Mogensen
- School of Biological Sciences, University of East Anglia, Norwich, UK
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Smith B, Schafer XL, Ambeskovic A, Spencer CM, Land H, Munger J. Addiction to Coupling of the Warburg Effect with Glutamine Catabolism in Cancer Cells. Cell Rep. 2016;17:821-836. [PMID: 27732857 PMCID: PMC5108179 DOI: 10.1016/j.celrep.2016.09.045] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [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: 07/22/2016] [Revised: 08/25/2016] [Accepted: 09/14/2016] [Indexed: 12/23/2022] Open
Abstract
Metabolic reprogramming is critical to oncogenesis, but the emergence and function of this profound reorganization remain poorly understood. Here we find that cooperating oncogenic mutations drive large-scale metabolic reprogramming, which is both intrinsic to cancer cells and obligatory for the transition to malignancy. This involves synergistic regulation of several genes encoding metabolic enzymes, including the lactate dehydrogenases LDHA and LDHB and mitochondrial glutamic pyruvate transaminase 2 (GPT2). Notably, GPT2 engages activated glycolysis to drive the utilization of glutamine as a carbon source for TCA cycle anaplerosis in colon cancer cells. Our data indicate that the Warburg effect supports oncogenesis via GPT2-mediated coupling of pyruvate production to glutamine catabolism. Although critical to the cancer phenotype, GPT2 activity is dispensable in cells that are not fully transformed, thus pinpointing a metabolic vulnerability specifically associated with cancer cell progression to malignancy.
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28
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Liu F, Bu HF, Geng H, De Plaen IG, Gao C, Wang P, Wang X, Kurowski JA, Yang H, Qian J, Tan XD. Sirtuin-6 preserves R-spondin-1 expression and increases resistance of intestinal epithelium to injury in mice. Mol Med 2017; 23:272-284. [PMID: 29387864 PMCID: PMC5654826 DOI: 10.2119/molmed.2017.00085] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 05/17/2017] [Accepted: 08/28/2017] [Indexed: 12/25/2022] Open
Abstract
Sirtuin-6 (Sirt6) is a critical epigenetic regulator, but its function in the gut is unknown. Here, we studied the role of intestinal epithelial Sirt6 in colitis-associated intestinal epithelial injury. We found that Sirt6, which is predominantly expressed in epithelial cells in intestinal crypts, is decreased in colitis in both mice and humans. Colitis-derived inflammatory mediators including interferon-γ and reactive oxygen species strongly inhibited Sirt6 protein expression in young adult mouse colonocyte (YAMC) cells. The susceptibility of the cells to injurious insults was increased after knockdown of Sirt6 expression. In contrast, YAMC cells with Sirt6 overexpression exhibited more resistance to injurious insult. Furthermore, intestinal epithelial-specific Sirt6 (Sirt6IEC-KO) knockout mice exhibited greater susceptibility to dextran sulfate sodium (DSS)-induced colitis. RNA sequencing transcriptome analysis revealed that inflammatory mediators such as tumor necrosis factor (TNF)-α suppressed expression of R-spondin-1 (Rspo1, a critical growth factor for intestinal epithelial cells) in Sirt6-silenced YAMC cells in vitro. In addition, lipopolysaccharide was found to inhibit colonic Rspo1 expression in Sirt6IEC-KO mice but not their control littermates. Furthermore, Sirt6IEC-KO mice with DSS-induced colitis also exhibited in a significant decrease in Rspo1 expression in colons. In vitro, knockdown of Rspo1 attenuated the effect of ectopic expression of Sirt6 on protection of YAMC cells against cell death challenges. In conclusion, Sirt6 plays an important role in protecting intestinal epithelial cells against inflammatory injury in a mechanism associated with preserving Rspo1 levels in the cells.
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Affiliation(s)
- Fangyi Liu
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People’s Republic of China
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Heng-Fu Bu
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Hua Geng
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Isabelle G De Plaen
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Chao Gao
- Center of Clinical Reproductive Medicine, State Key Laboratory of Reproductive Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Peng Wang
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Xiao Wang
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Jacob A Kurowski
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Hong Yang
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People’s Republic of China
| | - Jiaming Qian
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People’s Republic of China
| | - Xiao-Di Tan
- Center for Intestinal and Liver Inflammation Research, Stanley Manne Children’s Research Institute, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, Illinois, United States of America
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
- Department of Research and Development, Jesse Brown VA Medical Center, Chicago, Illinois, United States of America
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29
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McDonough EM, Barrett CW, Parang B, Mittal MK, Smith JJ, Bradley AM, Choksi YA, Coburn LA, Short SP, Thompson JJ, Zhang B, Poindexter SV, Fischer MA, Chen X, Li J, Revetta FL, Naik R, Washington MK, Rosen MJ, Hiebert SW, Wilson KT, Williams CS. MTG16 is a tumor suppressor in colitis-associated carcinoma. JCI Insight 2017; 2:78210. [PMID: 28814670 DOI: 10.1172/jci.insight.78210] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 07/14/2017] [Indexed: 12/27/2022] Open
Abstract
MTG16 is a member of the myeloid translocation gene (MTG) family of transcriptional corepressors. While MTGs were originally identified in chromosomal translocations in acute myeloid leukemia, recent studies have uncovered a role in intestinal biology. For example, Mtg16-/- mice have increased intestinal proliferation and are more sensitive to intestinal injury in colitis models. MTG16 is also underexpressed in patients with moderate/severe ulcerative colitis. Based on these findings, we postulated that MTG16 might protect against colitis-associated carcinogenesis. MTG16 was downregulated at the protein and RNA levels in patients with inflammatory bowel disease and in those with colitis-associated carcinoma. Mtg16-/- mice subjected to inflammatory carcinogenesis modeling exhibited worse colitis and increased tumor multiplicity and size. Loss of MTG16 also increased severity of dysplasia, apoptosis, proliferation, DNA damage, and WNT signaling. Moreover, transplantation of WT marrow into Mtg16-/- mice failed to rescue the Mtg16-/- protumorigenic phenotypes, indicating an epithelium-specific role for MTG16. While MTG dysfunction is widely appreciated in hematopoietic malignancies, the role of this gene family in epithelial homeostasis, and in colon cancer, was unrealized. This report identifies MTG16 as an important modulator of colitis and tumor development in inflammatory carcinogenesis.
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Affiliation(s)
| | | | | | | | | | | | - Yash A Choksi
- Department of Medicine, Division of Gastroenterology
| | - Lori A Coburn
- Department of Medicine, Division of Gastroenterology.,Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | | | | | | | | | - Melissa A Fischer
- Department of Biochemistry, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Xi Chen
- Department of Public Health Sciences and the Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Jiang Li
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, California, USA
| | - Frank L Revetta
- Department of Pathology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Rishi Naik
- Department of Cancer Biology.,Department of Medicine, Division of Gastroenterology
| | - M Kay Washington
- Department of Pathology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Michael J Rosen
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Scott W Hiebert
- Department of Biochemistry, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Keith T Wilson
- Department of Cancer Biology.,Department of Medicine, Division of Gastroenterology.,Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA.,Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA
| | - Christopher S Williams
- Department of Cancer Biology.,Department of Medicine, Division of Gastroenterology.,Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA.,Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA
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30
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Alexander KL, Katz J, Elson CO. CBirTox is a selective antigen-specific agonist of the Treg-IgA-microbiota homeostatic pathway. PLoS One 2017; 12:e0181866. [PMID: 28750075 PMCID: PMC5531474 DOI: 10.1371/journal.pone.0181866] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 07/07/2017] [Indexed: 01/16/2023] Open
Abstract
Cultivating an environment of mutualism between host cells and the microbiota is vital, and dysregulation of this relationship is associated with multiple immune disorders including metabolic and skin diseases, asthma, allergy, and Inflammatory Bowel Disease (IBD). One prominent mechanism for maintaining homeostasis is the protective regulatory T cell (Treg)- Immunoglobulin A (IgA) pathway toward microbiota antigens, in which Tregs maintain homeostasis and provide critical survival factors to IgA+ B cells. In order to amplify the Treg-IgA pathway, we have generated a fusion protein, CBirTox, comprised of a portion of the carboxy terminus of CBir1, a microbiota flagellin, genetically coupled to Cholera Toxin B subunit (CTB) via the A2 linker of CT. Both dendritic cells (DCs) and B cells pulsed with CBirTox selectively induced functional CD4+Foxp3+ Tregs in vitro, and CBirTox augmented CD4+Foxp3+ cell numbers in vivo. The induced Foxp3 expression was independent of retinoic acid (RA) signaling but was inhibited by neutralization of TGF-β. CBirTox treatment of B cells downregulated mammalian target of rapamycin (mTOR) signaling. Furthermore, CBirTox-pulsed DCs induced substantial production of IgA from naïve B cells. Collectively these data demonstrate that CBirTox represents a novel approach to bolstering the Treg-IgA pathway at the host-microbiota interface.
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Affiliation(s)
- Katie L. Alexander
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Jannet Katz
- Department of Pediatric Dentistry, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Charles O. Elson
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States of America
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, United States of America
- * E-mail:
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31
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Tsukahara T, Hamouda N, Utsumi D, Matsumoto K, Amagase K, Kato S. G protein-coupled receptor 35 contributes to mucosal repair in mice via migration of colonic epithelial cells. Pharmacol Res 2017. [PMID: 28648739 DOI: 10.1016/j.phrs.2017.06.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [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] [Indexed: 12/12/2022]
Abstract
G protein-coupled receptor 35 (GPR35), a receptor for lysophosphatidic acid, is highly expressed in the gastrointestinal tract. Recently, GPR35 has been implicated in the onset of inflammatory bowel disease (IBD), but its role in physiological and pathological processes in the colon remains undefined. In this study, we investigated the contribution of GPR35-mediated signalling to mucosal repair of colonic epithelium in IBD. GPR35 function was examined in a wound healing model, using young adult mouse colon epithelium (YAMC) cells, and in a dextran sulphate sodium (DSS)-induced mouse model of colitis. Cell proliferation, mRNA expression, extracellular signal-regulated kinase (ERK) activation, and protein localization were determined by MTT assay, quantitative RT-PCR, western blotting, and immunohistochemistry, respectively. GPR35 agonists (YE120, zaprinast, and pamoic acid) promoted wound repair in a concentration-dependent manner independently of cell proliferation, whereas a specific GPR35 antagonist CID2745687, forskolin, and pertussis toxin reversed the YE120-induced effect. YE120 increased the mRNA expression of fibronectin and its receptor integrin α5, and ERK1/2 phosphorylation, but these responses were attenuated by CID2745687 and forskolin. Furthermore, the severity of DSS-induced colitis was significantly reduced by daily injections of pamoic acid via upregulation of fibronectin and integrin α5 in the colonic epithelium. GPR35 signalling promotes mucosal repair by inducing fibronectin and integrin α5 expression, coupling to Gi protein, and activating ERK1/2 in colonic epithelial cells. These findings define GPR35 as a candidate therapeutic target in IBD.
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Affiliation(s)
- Takuya Tsukahara
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, 5 Nakauchi-cho Misasagi Yamashina-ku, Kyoto, Japan.
| | - Nahla Hamouda
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, 5 Nakauchi-cho Misasagi Yamashina-ku, Kyoto, Japan.
| | - Daichi Utsumi
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, 5 Nakauchi-cho Misasagi Yamashina-ku, Kyoto, Japan.
| | - Kenjiro Matsumoto
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, 5 Nakauchi-cho Misasagi Yamashina-ku, Kyoto, Japan.
| | - Kikuko Amagase
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, 5 Nakauchi-cho Misasagi Yamashina-ku, Kyoto, Japan.
| | - Shinichi Kato
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, 5 Nakauchi-cho Misasagi Yamashina-ku, Kyoto, Japan.
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32
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Hamouda N, Sano T, Oikawa Y, Ozaki T, Shimakawa M, Matsumoto K, Amagase K, Higuchi K, Kato S. Apoptosis, Dysbiosis and Expression of Inflammatory Cytokines are Sequential Events in the Development of 5-Fluorouracil-Induced Intestinal Mucositis in Mice. Basic Clin Pharmacol Toxicol 2017; 121:159-168. [PMID: 28374966 DOI: 10.1111/bcpt.12793] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 03/29/2017] [Indexed: 12/26/2022]
Abstract
The chemotherapeutic agent 5-fluorouracil (5-FU) causes intestinal mucositis with severe diarrhoea, but the pathogenesis is not fully understood. In this study, we investigated the pathogenic effects of 5-FU in mice, focusing on apoptosis, enterobacteria and inflammatory cytokines. Repeated administration of 5-FU caused severe intestinal mucositis on day 6, accompanied by diarrhoea and body-weight loss. TNF-α expression increased 1 day after exposure to the drug, and spiked a second time on day 4, at which point myeloperoxidase activity and IL-1β expression also increased. Apoptotic cells were observed in intestinal crypts only on day 1. 5-FU also induced dysbiosis, notably decreasing the abundance of intestinal Firmicutes while increasing the abundance of Bacteroidetes and Verrucomicrobia. Twice-daily co-administration of oral antibiotics significantly reduced the severity of intestinal mucositis and dysbiosis, and blocked the increase in myeloperoxidase activity and cytokine expression on day 6, without affecting apoptosis and TNF-α up-regulation on day 1. In cultured colonic epithelial cells, exposure to 5-FU also up-regulated TNF-α expression. Collectively, the data suggest that crypt apoptosis, dysbiosis and expression of inflammatory cytokines are sequential events in the development of intestinal mucositis after exposure to 5-FU. In particular, 5-FU appears to directly induce apoptosis via TNF-α and to suppress intestinal cell proliferation, thereby resulting in degradation of the epithelial barrier, as well as in secondary inflammation mediated by inflammatory cytokines.
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Affiliation(s)
- Nahla Hamouda
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Tatsushi Sano
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan.,Second Department of Internal Medicine, Osaka Medical College, Takatsuki, Osaka, Japan
| | - Yosuke Oikawa
- R&D Center, Biofermin Pharmaceutical Co., Ltd., Kobe, Hyogo, Japan
| | - Toru Ozaki
- R&D Center, Biofermin Pharmaceutical Co., Ltd., Kobe, Hyogo, Japan
| | - Masaki Shimakawa
- R&D Center, Biofermin Pharmaceutical Co., Ltd., Kobe, Hyogo, Japan
| | - Kenjiro Matsumoto
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Kikuko Amagase
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Kazuhide Higuchi
- Second Department of Internal Medicine, Osaka Medical College, Takatsuki, Osaka, Japan
| | - Shinichi Kato
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan
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33
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Lopetuso LR, Jia R, Wang XM, Jia LG, Petito V, Goodman WA, Meddings JB, Cominelli F, Reuter BK, Pizarro TT. Epithelial-specific Toll-like Receptor (TLR)5 Activation Mediates Barrier Dysfunction in Experimental Ileitis. Inflamm Bowel Dis 2017; 23:392-403. [PMID: 28146004 DOI: 10.1097/MIB.0000000000001035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND A large body of evidence supports a central role of TLR5 and its natural ligand, flagellin, in Crohn's disease (CD), with the precise mechanism(s) still unresolved. METHODS We investigated the role of flagellin/TLR5 in SAMP1/YitFc (SAMP) mice, a spontaneous model of Crohn's disease-like ileitis. RESULTS Ileal Tlr5 and serum antiflagellin IgG antibodies were increased in SAMP before the onset of inflammation and during established disease; these trends were abrogated in the absence of colonizing commensal bacteria. Irradiated SAMP receiving either wild-type (AKR) or SAMP bone marrow (BM) developed severe ileitis and displayed increased ileal Tlr5 compared with AKR recipients of either SAMP or AKR bone marrow, neither of which conferred ileitis, suggesting that elevated TLR5 in native SAMP is derived primarily from a nonhematopoietic (e.g., epithelial) source. Indeed, ileal epithelial TLR5 in preinflamed SAMP was increased compared with age-matched AKR and germ-free SAMP. TLR5-specific ex vivo activation of SAMP ileal tissues decreased epithelial barrier resistance, indicative of increased permeability, and was accompanied by altered expression of the tight junction proteins, claudin-3, occludin, and zonula occludens-1. CONCLUSIONS Our results provide evidence that aberrant, elevated TLR5 expression is present in the ileal epithelium of SAMP mice, is augmented in the presence of the gut microbiome, and that TLR5 activation in response to bacterial flagellin results in a deficiency to maintain appropriate epithelial barrier integrity. Together, these findings represent a potential mechanistic pathway leading to the exacerbation and perpetuation of chronic gut inflammation in experimental ileitis and possibly, in patients with Crohn's disease.
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34
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Grabinger T, Bode KJ, Demgenski J, Seitz C, Delgado ME, Kostadinova F, Reinhold C, Etemadi N, Wilhelm S, Schweinlin M, Hänggi K, Knop J, Hauck C, Walles H, Silke J, Wajant H, Nachbur U, W Wei-Lynn W, Brunner T. Inhibitor of Apoptosis Protein-1 Regulates Tumor Necrosis Factor-Mediated Destruction of Intestinal Epithelial Cells. Gastroenterology 2017; 152:867-879. [PMID: 27889570 DOI: 10.1053/j.gastro.2016.11.019] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [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: 03/01/2016] [Revised: 10/25/2016] [Accepted: 11/16/2016] [Indexed: 01/03/2023]
Abstract
BACKGROUND AND AIMS Tumor necrosis factor (TNF) is a cytokine that promotes inflammation and contributes to pathogenesis of inflammatory bowel diseases. Unlike other cells and tissues, intestinal epithelial cells undergo rapid cell death upon exposure to TNF, by unclear mechanisms. We investigated the roles of inhibitor of apoptosis proteins (IAPs) in the regulation of TNF-induced cell death in the intestinal epithelium of mice and intestinal organoids. METHODS RNA from cell lines and tissues was analyzed by quantitative polymerase chain reaction, protein levels were analyzed by immunoblot assays. BIRC2 (also called cIAP1) was expressed upon induction from lentiviral vectors in young adult mouse colon (YAMC) cells. YAMC cells, the mouse colon carcinoma cell line MC38, the mouse macrophage cell line RAW 264.7, or mouse and human organoids were incubated with second mitochondrial activator of caspases (Smac)-mimetic compound LCL161 or recombinant TNF-like weak inducer of apoptosis (TNFSF12) along with TNF, and cell death was quantified. C57BL/6 mice with disruption of Xiap, Birc2 (encodes cIAP1), Birc3 (encodes cIAP2), Tnfrsf1a, or Tnfrsf1b (Tnfrsf1a and b encode TNF receptors) were injected with TNF or saline (control); liver and intestinal tissues were collected and analyzed for apoptosis induction by cleaved caspase 3 immunohistochemistry. We also measured levels of TNF and alanine aminotransferase in serum from mice. RESULTS YAMC cells, and mouse and human intestinal organoids, died rapidly in response to TNF. YAMC and intestinal crypts expressed lower levels of XIAP, cIAP1, cIAP2, and cFLIP than liver tissue. Smac-mimetics reduced levels of cIAP1 and XIAP in MC38 and YAMC cells, and Smac-mimetics and TNF-related weak inducer of apoptosis increased TNF-induced cell death in YAMC cells and organoids-most likely by sequestering and degrading cIAP1. Injection of TNF greatly increased levels of cell death in intestinal tissue of cIAP1-null mice, compared with wild-type C57BL/6 mice, cIAP2-null mice, or XIAP-null mice. Excessive TNF-induced cell death in the intestinal epithelium was mediated TNF receptor 1. CONCLUSIONS In a study of mouse and human cell lines, organoids, and tissues, we found cIAP1 to be required for regulation of TNF-induced intestinal epithelial cell death and survival. These findings have important implications for the pathogenesis of TNF-mediated enteropathies and chronic inflammatory diseases of the intestine.
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Affiliation(s)
- Thomas Grabinger
- Biochemical Pharmacology, Department of Biology, University of Konstanz, Germany
| | - Konstantin J Bode
- Biochemical Pharmacology, Department of Biology, University of Konstanz, Germany
| | - Janine Demgenski
- Biochemical Pharmacology, Department of Biology, University of Konstanz, Germany
| | - Carina Seitz
- Biochemical Pharmacology, Department of Biology, University of Konstanz, Germany
| | - M Eugenia Delgado
- Biochemical Pharmacology, Department of Biology, University of Konstanz, Germany
| | - Feodora Kostadinova
- Biochemical Pharmacology, Department of Biology, University of Konstanz, Germany
| | - Cindy Reinhold
- Biochemical Pharmacology, Department of Biology, University of Konstanz, Germany
| | - Nima Etemadi
- Cell Signaling and Cell Death Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Sabine Wilhelm
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Würzburg, Würzburg, Germany
| | - Matthias Schweinlin
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Würzburg, Würzburg, Germany
| | - Kay Hänggi
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Janin Knop
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Christof Hauck
- Department of Biology, University of Konstanz, Konstanz, Germany
| | - Heike Walles
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Würzburg, Würzburg, Germany; Translational Center Würzburg, Würzburg branch of the Fraunhofer IGB, Würzburg, Germany
| | - John Silke
- Cell Signaling and Cell Death Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Harald Wajant
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Germany
| | - Ueli Nachbur
- Cell Signaling and Cell Death Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Wong W Wei-Lynn
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Thomas Brunner
- Biochemical Pharmacology, Department of Biology, University of Konstanz, Germany.
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Wang Y, Liu L, Moore DJ, Shen X, Peek RM, Acra SA, Li H, Ren X, Polk DB, Yan F. An LGG-derived protein promotes IgA production through upregulation of APRIL expression in intestinal epithelial cells. Mucosal Immunol 2017; 10:373-84. [PMID: 27353252 DOI: 10.1038/mi.2016.57] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [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: 01/18/2016] [Accepted: 05/22/2016] [Indexed: 02/07/2023]
Abstract
p40, a Lactobacillus rhamnosus GG (LGG)-derived protein, transactivates epidermal growth factor receptor (EGFR) in intestinal epithelial cells, leading to amelioration of intestinal injury and inflammation. To elucidate mechanisms by which p40 regulates mucosal immunity to prevent inflammation, this study aimed to determine the effects and mechanisms of p40 on regulation of a proliferation-inducing ligand (APRIL) expression in intestinal epithelial cells for promoting immunoglobulin A (IgA) production. p40 upregulated April gene expression and protein production in mouse small intestine epithelial (MSIE) cells, which were inhibited by blocking EGFR expression and kinase activity. Enteroids from Egfrfl/fl, but not Egfrfl/fl-Vil-Cre mice with EGFR specifically deleted in intestinal epithelial cells, exhibited increased April gene expression by p40 treatment. p40-conditioned media from MSIE cells increased B-cell class switching to IgA+ cells and IgA production, which was suppressed by APRIL receptor-neutralizing antibodies. Treatment of B cells with p40 did not show any effects on IgA production. p40 treatment increased April gene expression and protein production in small intestinal epithelial cells, fecal IgA levels, IgA+B220+, IgA+CD19+, and IgA+ plasma cells in lamina propria of Egfrfl/fl, but not of Egfrfl/fl-Vil-Cre, mice. Thus p40 upregulates EGFR-dependent APRIL production in intestinal epithelial cells, which may contribute to promoting IgA production.
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36
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Gao FJ, Shi L, Hines T, Hebbar S, Neufeld KL, Smith DS. Insulin signaling regulates a functional interaction between adenomatous polyposis coli and cytoplasmic dynein. Mol Biol Cell 2017; 28:587-599. [PMID: 28057765 PMCID: PMC5328618 DOI: 10.1091/mbc.e16-07-0555] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 12/23/2016] [Accepted: 12/30/2016] [Indexed: 12/24/2022] Open
Abstract
Diabetes is linked to an increased risk for colorectal cancer, but the mechanistic underpinnings of this clinically important effect are unclear. Here we describe an interaction between the microtubule motor cytoplasmic dynein, the adenomatous polyposis coli tumor suppressor protein (APC), and glycogen synthase kinase-3β (GSK-3β), which could shed light on this issue. GSK-3β is perhaps best known for glycogen regulation, being inhibited downstream in an insulin-signaling pathway. However, the kinase is also important in many other processes. Mutations in APC that disrupt the regulation of β-catenin by GSK-3β cause colorectal cancer in humans. Of interest, both APC and GSK-3β interact with microtubules and cellular membranes. We recently demonstrated that dynein is a GSK-3β substrate and that inhibition of GSK-3β promotes dynein-dependent transport. We now report that dynein stimulation in intestinal cells in response to acute insulin exposure (or GSK-3β inhibition) is blocked by tumor-promoting isoforms of APC that reduce an interaction between wild-type APC and dynein. We propose that under normal conditions, insulin decreases dynein binding to APC to stimulate minus end-directed transport, which could modulate endocytic and secretory systems in intestinal cells. Mutations in APC likely impair the ability to respond appropriately to insulin signaling. This is exciting because it has the potential to be a contributing factor in the development of colorectal cancer in patients with diabetes.
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Affiliation(s)
- Feng J Gao
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD 21025
| | - Liang Shi
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208
| | - Timothy Hines
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208
| | - Sachin Hebbar
- Department of Anesthesiology and Critical Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - Kristi L Neufeld
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS 66045
| | - Deanna S Smith
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208
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Cheng Y, Jin UH, Davidson LA, Chapkin RS, Jayaraman A, Tamamis P, Orr A, Allred C, Denison MS, Soshilov A, Weaver E, Safe S. Editor's Highlight: Microbial-Derived 1,4-Dihydroxy-2-naphthoic Acid and Related Compounds as Aryl Hydrocarbon Receptor Agonists/Antagonists: Structure-Activity Relationships and Receptor Modeling. Toxicol Sci 2016; 155:458-473. [PMID: 27837168 DOI: 10.1093/toxsci/kfw230] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
1,4-Dihydroxy-2-naphthoic acid (1,4-DHNA) is a bacterial-derived metabolite that binds the aryl hydrocarbon receptor (AhR) and exhibits anti-inflammatory activity in the gut. The structure-dependent AhR activity of hydroxyl/carboxy-substituted naphthoic acids (NAs) was determined in young adult mouse colonic (YAMC) cells and human Caco2 colon cancer cells using CYP1A1/CYP1B1 mRNAs as Ah-responsive genes. Compounds used in this study include 1,4-, 3,5-, and 3,7-DHNA, 1,4-dimethoxy-2-naphthoic acid (1,4-DMNA), 1- and 4-hydroxy-2-naphthoic acid (1-HNA, 4-HNA), 1- and 2-naphthoic acid (1-NA, 2-NA), and 1- and 2-naphthol (1-NOH, 2-NOH). 1,4-DHNA was the most potent compound among hydroxyl/carboxy naphthalene derivatives, and the fold induction response for CYP1A1 and CYP1B1 was similar to that observed for 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in YAMC and Caco2 cells. 1- and 4-HNA were less potent than 1,4-DHNA but induced maximal (TCDD-like) response for CYP1B1 (both cell lines) and CYP1A1 (Caco2 cells). With the exception of 1- and 2-NA, all compounds significantly induced Cyp1b1 in YAMC cells and these responses were not observed in AhR-deficient YAMC cells generated using CRISPR/Cas9 technology. In addition, we also observed that 1- and 2-NOH (and 1,4-DHNA) were weak AhR agonists, and 1- and 2-NOH also exhibited partial AhR antagonist activity. Structure-activity relationship studies for CYP1A1 but not CYP1B1 were similar in both cell lines, and CYP1A1 induction required one or both 1,4-dihydroxy substituents and activity was significantly enhanced by the 2-carboxyl group. We also used computational analysis to show that 1,4-DHNA and TCDD share similar interactions within the AhR binding pocket and differ primarily due to the negatively charged group of 1,4-DHNA.
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Affiliation(s)
- Yating Cheng
- Department of Veterinary Physiology and Pharmacology
| | - Un-Ho Jin
- Department of Veterinary Physiology and Pharmacology
| | | | | | - Arul Jayaraman
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843
| | - Phanourios Tamamis
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843
| | - Asuka Orr
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843
| | | | - Michael S Denison
- Department of Environmental Toxicology, University of California, Davis, California 95616
| | - Anatoly Soshilov
- Department of Environmental Toxicology, University of California, Davis, California 95616
| | - Evelyn Weaver
- Department of Animal Science, Texas A&M University, College Station, Texas 77843
| | - Stephen Safe
- Department of Veterinary Physiology and Pharmacology
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Higashimura Y, Naito Y, Takagi T, Uchiyama K, Mizushima K, Yoshikawa T. Propionate Promotes Fatty Acid Oxidation through the Up-Regulation of Peroxisome Proliferator-Activated Receptor α in Intestinal Epithelial Cells. J Nutr Sci Vitaminol (Tokyo) 2016; 61:511-5. [PMID: 26875495 DOI: 10.3177/jnsv.61.511] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Short chain fatty acids (SCFAs) are produced in the colonic lumen mainly by bacterial fermentation of dietary fiber. Emerging evidence shows that SCFA has important physiological and pathophysiological effects on colonic and systemic events. Recently, propionate, known as a kind of SCFA, has been shown to lower fatty acid contents in plasma and reduce food intake. However, the detailed mechanism underlying the propionate-mediated lipid metabolism action remains poorly understood. The intestinal lipid metabolism process is critical for systemic energy homeostasis. Therefore, we investigate here the effects of propionate on intestinal lipid metabolism. Results show that propionate induced peroxisome proliferator-activated receptor α (PPARα) expression time-dependently and concentration-dependently in YAMC (a mouse intestinal epithelial cell line) cells. The expression levels of PPARα-responsive genes such as carnitine palmitoyl transferase II (CPTII) and trifunctional protein α (TFPα) were up-regulated in the presence of propionate, thereby suppressing triglyceride (TG) accumulation. Furthermore, propionate-mediated PPARα induction required phosphorylation of extracellular signal-regulated kinase. Collectively, these data indicate that propionate regulates intestinal lipid metabolism through the induction of PPARα expression. Results suggest that the inhibitory effect of propionate on TG accumulation partly contributes to the propionate-mediated fatty acid-lowering effect.
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Affiliation(s)
- Yasuki Higashimura
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
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Singh K, Al-Greene NT, Verriere TG, Coburn LA, Asim M, Barry DP, Allaman MM, Hardbower DM, Delgado AG, Piazuelo MB, Vallance BA, Gobert AP, Wilson KT. The L-Arginine Transporter Solute Carrier Family 7 Member 2 Mediates the Immunopathogenesis of Attaching and Effacing Bacteria. PLoS Pathog 2016; 12:e1005984. [PMID: 27783672 PMCID: PMC5081186 DOI: 10.1371/journal.ppat.1005984] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 10/06/2016] [Indexed: 12/17/2022] Open
Abstract
Solute carrier family 7 member 2 (SLC7A2) is an inducible transporter of the semi-essential amino acid L-arginine (L-Arg), which has been implicated in immune responses to pathogens. We assessed the role of SLC7A2 in murine infection with Citrobacter rodentium, an attaching and effacing enteric pathogen that causes colitis. Induction of SLC7A2 was upregulated in colitis tissues, and localized predominantly to colonic epithelial cells. Compared to wild-type mice, Slc7a2–/–mice infected with C. rodentium had improved survival and decreased weight loss, colon weight, and histologic injury; this was associated with decreased colonic macrophages, dendritic cells, granulocytes, and Th1 and Th17 cells. In infected Slc7a2–/–mice, there were decreased levels of the proinflammatory cytokines G-CSF, TNF-α, IL-1α, IL-1β, and the chemokines CXCL1, CCL2, CCL3, CCL4, CXCL2, and CCL5. In bone marrow chimeras, the recipient genotype drove the colitis phenotype, indicative of the importance of epithelial, rather than myeloid SLC7A2. Mice lacking Slc7a2 exhibited reduced adherence of C. rodentium to the colonic epithelium and decreased expression of Talin-1, a focal adhesion protein involved in the attachment of the bacterium. The importance of SLC7A2 and Talin-1 in the intimate attachment of C. rodentium and induction of inflammatory response was confirmed in vitro, using conditionally-immortalized young adult mouse colon (YAMC) cells with shRNA knockdown of Slc7a2 or Tln1. Inhibition of L-Arg uptake with the competitive inhibitor, L-lysine (L-Lys), also prevented attachment of C. rodentium and chemokine expression. L-Lys and siRNA knockdown confirmed the role of L-Arg and SLC7A2 in human Caco-2 cells co-cultured with enteropathogenic Escherichia coli. Overexpression of SLC7A2 in human embryonic kidney cells increased bacterial adherence and chemokine expression. Taken together, our data indicate that C. rodentium enhances its own pathogenicity by inducing the expression of SLC7A2 to favor its attachment to the epithelium and thus create its ecological niche. Intestinal infections by attaching and effacing (A/E) bacteria widely impact human health, with major social and economic repercussions. Mucosal immunity plays a critical role in determining the outcome of these infections. The amino acid L-arginine regulates inflammatory responses to bacterial pathogens. We studied the role of the L-arginine transporter solute carrier family 7 member 2 (SLC7A2) during infection with the A/E pathogen Citrobacter rodentium. SLC7A2 is induced in colonic epithelial cells during the infection and facilitates the intimate attachment of the bacteria, thus initiating the inflammatory response of the infected mucosa. These data were confirmed in vitro using C. rodentium-infected mouse cells and human colonic epithelial cells infected with enteropathogenic Escherichia coli. Our work describes a mechanism by which A/E bacteria manipulate host response to favor their colonization, thereby positioning SLC7A2 as an unrecognized therapeutic target to limit infection with enterobacteria.
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Affiliation(s)
- Kshipra Singh
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Nicole T. Al-Greene
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Thomas G. Verriere
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Lori A. Coburn
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, United States of America
| | - Mohammad Asim
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Daniel P. Barry
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Margaret M. Allaman
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Dana M. Hardbower
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Alberto G. Delgado
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - M. Blanca Piazuelo
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Bruce A. Vallance
- Division of Gastroenterology, Department of Pediatrics, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Alain P. Gobert
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Keith T. Wilson
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Center for Mucosal Inflammation and Cancer, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, United States of America
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- * E-mail:
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40
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Uchiyama K, Sakiyama T, Hasebe T, Musch MW, Miyoshi H, Nakagawa Y, He TC, Lichtenstein L, Naito Y, Itoh Y, Yoshikawa T, Jabri B, Stappenbeck T, Chang EB. Butyrate and bioactive proteolytic form of Wnt-5a regulate colonic epithelial proliferation and spatial development. Sci Rep 2016; 6:32094. [PMID: 27561676 PMCID: PMC4999796 DOI: 10.1038/srep32094] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 08/01/2016] [Indexed: 12/13/2022] Open
Abstract
Proliferation and spatial development of colonic epithelial cells are highly regulated along the crypt vertical axis, which, when perturbed, can result in aberrant growth and carcinogenesis. In this study, two key factors were identified that have important and counterbalancing roles regulating these processes: pericrypt myofibroblast-derived Wnt-5a and the microbial metabolite butyrate. Cultured YAMC cell proliferation and heat shock protein induction were analzyed after butryate, conditioned medium with Wnt5a activity, and FrzB containing conditioned medium. In vivo studies to modulate Hsp25 employed intra-colonic wall Hsp25 encoding lentivirus. To silence Wnt-5a in vivo, intra-colonic wall Wnt-5a silencing RNA was used. Wnt-5a, secreted by stromal myofibroblasts of the lower crypt, promotes proliferation through canonical β-catenin activation. Essential to this are two key requirements: (1) proteolytic conversion of the highly insoluble ~40 kD Wnt-5a protein to a soluble 36 mer amino acid peptide that activates epithelial β-catenin and cellular proliferation, and (2) the simultaneous inhibition of butyrate-induced Hsp25 by Wnt-5a which is necessary to arrest the proliferative process in the upper colonic crypt. The interplay and spatial gradients of these factors insures that crypt epithelial cell proliferation and development proceed in an orderly fashion, but with sufficient plasticity to adapt to physiological perturbations including inflammation.
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Affiliation(s)
- Kazuhiko Uchiyama
- Department of Medicine, University of Chicago, Chicago, IL 60637; USA.,Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto 6028566; Japan
| | - Toshio Sakiyama
- Department of Medicine, University of Chicago, Chicago, IL 60637; USA.,Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima 8908520; Japan
| | - Takumu Hasebe
- Department of Medicine, University of Chicago, Chicago, IL 60637; USA
| | - Mark W Musch
- Department of Medicine, University of Chicago, Chicago, IL 60637; USA
| | - Hiroyuki Miyoshi
- Department of Pathology, Washington University at St. Louis, St. Louis, MO, USA
| | - Yasushi Nakagawa
- Department of Medicine, University of Chicago, Chicago, IL 60637; USA
| | - Tong-Chuan He
- Department of Surgery, University of Chicago; Chicago, IL 60637; USA
| | - Lev Lichtenstein
- Department of Medicine, University of Chicago, Chicago, IL 60637; USA.,Department of Gastroenterology, Soroka University Medical Center, Beer-Sheva 84101; Israel
| | - Yuji Naito
- Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto 6028566; Japan
| | - Yoshito Itoh
- Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto 6028566; Japan
| | - Toshikazu Yoshikawa
- Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto 6028566; Japan
| | - Bana Jabri
- Department of Medicine, University of Chicago, Chicago, IL 60637; USA
| | | | - Eugene B Chang
- Department of Medicine, University of Chicago, Chicago, IL 60637; USA
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41
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Jellbauer S, Perez Lopez A, Behnsen J, Gao N, Nguyen T, Murphy C, Edwards RA, Raffatellu M. Beneficial Effects of Sodium Phenylbutyrate Administration during Infection with Salmonella enterica Serovar Typhimurium. Infect Immun 2016; 84:2639-52. [PMID: 27382022 DOI: 10.1128/IAI.00132-16] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 06/24/2016] [Indexed: 02/07/2023] Open
Abstract
Sodium phenylbutyrate (PBA) is a derivative of the short-chain fatty acid butyrate and is approved for treatment of urea cycle disorders and progressive familial intrahepatic cholestasis type 2. Previously known functions include histone deacetylase inhibitor, endoplasmic reticulum stress inhibitor, ammonia sink, and chemical chaperone. Here, we show that PBA has a previously undiscovered protective role in host mucosal defense during infection. Administration of PBA to Taconic mice resulted in the increase of intestinal Lactobacillales and segmented filamentous bacteria (SFB), as well as an increase of interleukin 17 (IL-17) production by intestinal cells. This effect was not observed in Jackson Laboratory mice, which are not colonized with SFB. Because previous studies showed that IL-17 plays a protective role during infection with mucosal pathogens, we hypothesized that Taconic mice treated with PBA would be more resistant to infection with Salmonella enterica serovar Typhimurium (S Typhimurium). By using the streptomycin-treated mouse model, we found that Taconic mice treated with PBA exhibited significantly lower S Typhimurium intestinal colonization and dissemination to the reticuloendothelial system, as well as lower levels of inflammation. The lower levels of S Typhimurium gut colonization and intestinal inflammation were not observed in Jackson Laboratory mice. Although PBA had no direct effect on bacterial replication, its administration reduced S Typhimurium epithelial cell invasion and lowered the induction of the proinflammatory cytokine IL-23 in macrophage-like cells. These effects likely contributed to the better outcome of infection in PBA-treated mice. Overall, our results suggest that PBA induces changes in the microbiota and in the mucosal immune response that can be beneficial to the host during infection with S Typhimurium and possibly other enteric pathogens.
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42
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Zhao G, Liu L, Peek RM, Hao X, Polk DB, Li H, Yan F. Activation of Epidermal Growth Factor Receptor in Macrophages Mediates Feedback Inhibition of M2 Polarization and Gastrointestinal Tumor Cell Growth. J Biol Chem 2016; 291:20462-72. [PMID: 27507810 DOI: 10.1074/jbc.m116.750182] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 07/25/2016] [Indexed: 01/04/2023] Open
Abstract
EGF receptor (EGFR) in tumor cells serves as a tumor promoter. However, information about EGFR activation in macrophages in regulating M2 polarization and tumor development is limited. This study aimed to investigate the effects of EGFR activation in macrophages on M2 polarization and development of gastrointestinal tumors. IL-4, a cytokine to elicit M2 polarization, stimulated release of an EGFR ligand, HB-EGF, and transactivation and down-regulation of EGFR in Raw 264.7 cells and peritoneal macrophages from WT mice. Knockdown of HB-EGF in macrophages inhibited EGFR transactivation by IL-4. IL-4-stimulated STAT6 activation, Arg1 and YM1 gene expression, and HB-EGF production were further enhanced by inhibition of EGFR activity in Raw 264.7 cells using an EGFR kinase inhibitor and in peritoneal macrophages from Egfr(wa5) mice with kinase inactive EGFR and by knockdown of EGFR in peritoneal macrophages from Egfr(fl/fl) LysM-Cre mice with myeloid cell-specific EGFR deletion. Chitin induced a higher level of M2 polarization in peritoneal macrophages in Egfr(fl/fl) LysM-Cre mice than that in Egfr(fl/fl) mice. Accordingly, IL-4-conditioned medium stimulated growth and epithelial-to-mesenchymal transition in gastric epithelial and colonic tumor cells, which were suppressed by that from Raw 264.7 cells with HB-EGF knockdown but promoted by that from Egfr(wa5) and Egfr(fl/fl) LysM-Cre peritoneal macrophages. Clinical assessment revealed that the number of macrophages with EGFR expression became less, indicating decreased inhibitory effects on M2 polarization, in late stage of human gastric cancers. Thus, IL-4-stimulated HB-EGF-dependent transactivation of EGFR in macrophages may mediate inhibitory feedback for M2 polarization and HB-EGF production, thereby inhibiting gastrointestinal tumor growth.
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Affiliation(s)
- Gang Zhao
- From the Department of Pediatrics, Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee 37232, the Department of Gastrointestinal Cancer Biology, National Clinical Cancer Research Center, Tianjin Cancer Institute and Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Liping Liu
- From the Department of Pediatrics, Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee 37232
| | - Richard M Peek
- the Departments of Medicine and Cancer Biology, Division of Gastroenterology, Vanderbilt University Medical Center, Nashville, Tennessee 37232
| | - Xishan Hao
- the Department of Gastrointestinal Cancer Biology, National Clinical Cancer Research Center, Tianjin Cancer Institute and Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - D Brent Polk
- the Departments of Pediatrics and Biochemistry and Molecular Biology, Children's Hospital Los Angeles and University of Southern California Keck School of Medicine, Los Angeles, California 90027, and the Saban Research Institute, Children's Hospital Los Angeles, Los Angeles, California 90027
| | - Hui Li
- the Department of Gastrointestinal Cancer Biology, National Clinical Cancer Research Center, Tianjin Cancer Institute and Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China,
| | - Fang Yan
- From the Department of Pediatrics, Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee 37232,
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43
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Takagi T, Naito Y, Uchiyama K, Mizuhima K, Suzuki T, Horie R, Hirata I, Tsuboi H, Yoshikawa T. Carbon monoxide promotes gastric wound healing in mice via the protein kinase C pathway. Free Radic Res 2016; 50:1098-1105. [DOI: 10.1080/10715762.2016.1189546] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tomohisa Takagi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yuji Naito
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kazuhiko Uchiyama
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Katsura Mizuhima
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takahiro Suzuki
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Ryusuke Horie
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Ikuhiro Hirata
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hisato Tsuboi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Toshikazu Yoshikawa
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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44
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Park JW, Park JM, Park DM, Kim DY, Kim HK. Stem Cells Antigen-1 Enriches for a Cancer Stem Cell-Like Subpopulation in Mouse Gastric Cancer. Stem Cells 2016; 34:1177-87. [DOI: 10.1002/stem.2329] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 11/23/2015] [Accepted: 12/08/2015] [Indexed: 01/06/2023]
Affiliation(s)
- Jun Won Park
- Biomolecular Function Research Branch Division of Precision Medicine and Cancer Informatics, Division of Precision Medicine and Cancer Informatics; National Cancer Center; Goyang Gyeonggi Republic of Korea
- Department of Veterinary Pathology, Department of Veterinary Pathology, College of Veterinary Medicine; Seoul National University; Seoul Republic of Korea
| | - Jung Min Park
- Biomolecular Function Research Branch Division of Precision Medicine and Cancer Informatics, Division of Precision Medicine and Cancer Informatics; National Cancer Center; Goyang Gyeonggi Republic of Korea
| | - Dong Min Park
- Biomolecular Function Research Branch Division of Precision Medicine and Cancer Informatics, Division of Precision Medicine and Cancer Informatics; National Cancer Center; Goyang Gyeonggi Republic of Korea
| | - Dae-Yong Kim
- Department of Veterinary Pathology, Department of Veterinary Pathology, College of Veterinary Medicine; Seoul National University; Seoul Republic of Korea
| | - Hark Kyun Kim
- Biomolecular Function Research Branch Division of Precision Medicine and Cancer Informatics, Division of Precision Medicine and Cancer Informatics; National Cancer Center; Goyang Gyeonggi Republic of Korea
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Haines RJ, Beard RS Jr, Eitner RA, Chen L, Wu MH. TNFα/IFNγ Mediated Intestinal Epithelial Barrier Dysfunction Is Attenuated by MicroRNA-93 Downregulation of PTK6 in Mouse Colonic Epithelial Cells. PLoS One 2016; 11:e0154351. [PMID: 27119373 DOI: 10.1371/journal.pone.0154351] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 04/12/2016] [Indexed: 12/17/2022] Open
Abstract
Since inflammatory bowel diseases (IBD) represent significant morbidity and mortality in the US, the need for defining novel drug targets and inflammatory mechanisms would be of considerable benefit. Although protein tyrosine kinase 6 (PTK6, also known as breast tumor kinase BRK) has been primarily studied in an oncogenic context, it was noted that PTK6 null mice exhibited significantly enhanced colonic epithelial barrier function. Considering that the inflammatory functions of PTK6 have not yet been explored, we hypothesized that cytokines responsible for mediating IBD, such as TNFα/IFNγ, may solicit the action of PTK6 to alter barrier function. After first assessing critical mediators of TNFα/IFNγ driven epithelial barrier dysfunction, we further explored the possibility of PTK6 in this inflammatory context. In this report, we showed that PTK6 siRNA and PTK6 null young adult mouse colonic epithelial cells (YAMC) exhibited significant attenuation of TNFα/IFNγ induced barrier dysfunction as measured by electric cell-substrate impedance sensing (ECIS) assay and permeability assays. In addition, PTK6 null cells transfected with PTK6 cDNA displayed restored barrier dysfunction in response to TNFα/IFNγ, while the cells transfected with vector alone showed similar attenuation of barrier dysfunction. Furthermore, using subcellular fractionation and immunocytochemistry experiments, we found that PTK6 plays a role in FoxO1 nuclear accumulation leading to down-regulation of claudin-3, a tight junction protein. Moreover, we searched for relevant miRNA candidates putative for targeting PTK6 in order to identify and assess the impact of microRNA that target PTK6 with respect to TNFα/IFNγ induced barrier dysfunction. Subsequently, we assayed likely targets and determined their effectiveness in attenuating PTK6 expression as well as cytokine induced barrier dysfunction. Results showed that miR-93 reduced PTK6 expression and attenuated TNFα/IFNγ imposed decrease in transepithelial electrical resistance (TER), as well as excluded FoxO1 from the nucleus. Our results indicate that PTK6 may act as a novel mediator of intestinal epithelial permeability during inflammatory injury, and miR-93 may protect intestinal epithelial barrier function, at least in part, by targeting PTK6.
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Chopra A, Bond MJ, Bleiler M, Yeagley M, Wright D, Giardina C. Efficient Activation of Apoptotic Signaling during Mitotic Arrest with AK301. PLoS One 2016; 11:e0153818. [PMID: 27097159 DOI: 10.1371/journal.pone.0153818] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 04/04/2016] [Indexed: 12/20/2022] Open
Abstract
Mitotic inhibitors are widely utilized chemotherapeutic agents that take advantage of mitotic defects in cancer cells. We have identified a novel class of piperazine-based mitotic inhibitors, of which AK301 is the most potent derivative identified to date (EC50 < 200 nM). Colon cancer cells arrested in mitosis with AK301 readily underwent a p53-dependent apoptosis following compound withdrawal and arrest release. This apoptotic response was significantly higher for AK301 than for other mitotic inhibitors tested (colchicine, vincristine, and BI 2536). AK301-treated cells exhibited a robust mitosis-associated DNA damage response, including ATM activation, γH2AX phosphorylation and p53 stabilization. The association between mitotic signaling and the DNA damage response was supported by the finding that Aurora B inhibition reduced the level of γH2AX staining. Confocal imaging of AK301-treated cells revealed multiple γ-tubulin microtubule organizing centers attached to microtubules, but with limited centrosome migration, raising the possibility that aberrant microtubule pulling may underlie DNA breakage. AK301 selectively targeted APC-mutant colonocytes and promoted TNF-induced apoptosis in p53-mutant colon cancer cells. Our findings indicate that AK301 induces a mitotic arrest state with a highly active DNA damage response. Together with a reversible arrest state, AK301 is a potent promoter of a mitosis-to-apoptosis transition that can target cancer cells with mitotic defects.
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Tarcic O, Pateras IS, Cooks T, Shema E, Kanterman J, Ashkenazi H, Boocholez H, Hubert A, Rotkopf R, Baniyash M, Pikarsky E, Gorgoulis VG, Oren M. RNF20 Links Histone H2B Ubiquitylation with Inflammation and Inflammation-Associated Cancer. Cell Rep 2016; 14:1462-1476. [PMID: 26854224 PMCID: PMC4761112 DOI: 10.1016/j.celrep.2016.01.020] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 11/24/2015] [Accepted: 01/01/2016] [Indexed: 02/07/2023] Open
Abstract
Factors linking inflammation and cancer are of great interest. We now report that the chromatin-targeting E3 ubiquitin ligase RNF20/RNF40, driving histone H2B monoubiquitylation (H2Bub1), modulates inflammation and inflammation-associated cancer in mice and humans. Downregulation of RNF20 and H2Bub1 favors recruitment of p65-containing nuclear factor κB (NF-κB) dimers over repressive p50 homodimers and decreases the heterochromatin mark H3K9me3 on a subset of NF-κB target genes to augment their transcription. Concordantly, RNF20(+/-) mice are predisposed to acute and chronic colonic inflammation and inflammation-associated colorectal cancer, with excessive myeloid-derived suppressor cells (MDSCs) that may quench antitumoral T cell activity. Notably, colons of human ulcerative colitis patients, as well as colorectal tumors, reveal downregulation of RNF20/RNF40 and H2Bub1 in both epithelium and stroma, supporting the clinical relevance of our tissue culture and mouse model findings.
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Affiliation(s)
- Ohad Tarcic
- Department of Molecular Cell Biology, The Weizmann Institute, Rehovot 7610001, Israel
| | - Ioannis S Pateras
- Molecular Carcinogenesis Group, Department of Histology-Embryology, School of Medicine, University of Athens, 11527 Athens, Greece
| | - Tomer Cooks
- Department of Molecular Cell Biology, The Weizmann Institute, Rehovot 7610001, Israel
| | - Efrat Shema
- Department of Molecular Cell Biology, The Weizmann Institute, Rehovot 7610001, Israel
| | - Julia Kanterman
- The Lautenberg Center for General and Tumor Immunology, Israel-Canada Medical Research Institute, Faculty of Medicine, The Hebrew University, Jerusalem 91120, Israel
| | - Hadas Ashkenazi
- The Lautenberg Center for General and Tumor Immunology, Israel-Canada Medical Research Institute, Faculty of Medicine, The Hebrew University, Jerusalem 91120, Israel
| | - Hana Boocholez
- The Lautenberg Center for General and Tumor Immunology, Israel-Canada Medical Research Institute, Faculty of Medicine, The Hebrew University, Jerusalem 91120, Israel
| | - Ayala Hubert
- Sharett Institute of Oncology, Hebrew University-Hadassah Medical Center, Jerusalem 91120, Israel
| | - Ron Rotkopf
- Department of Biological Services, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Michal Baniyash
- The Lautenberg Center for General and Tumor Immunology, Israel-Canada Medical Research Institute, Faculty of Medicine, The Hebrew University, Jerusalem 91120, Israel
| | - Eli Pikarsky
- Department of Immunology and Cancer Research, Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel; Department of Pathology, Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel
| | - Vassilis G Gorgoulis
- Molecular Carcinogenesis Group, Department of Histology-Embryology, School of Medicine, University of Athens, 11527 Athens, Greece; Biomedical Research Foundation, Academy of Athens, 11527 Athens, Greece; Faculty Institute for Cancer Sciences, University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9WL, UK
| | - Moshe Oren
- Department of Molecular Cell Biology, The Weizmann Institute, Rehovot 7610001, Israel.
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Karnati S, Palaniswamy S, Alam MR, Oruqaj G, Stamme C, Baumgart-vogt E. C22-bronchial and T7-alveolar epithelial cell lines of the immortomouse are excellent murine cell culture model systems to study pulmonary peroxisome biology and metabolism. Histochem Cell Biol 2016; 145:287-304. [DOI: 10.1007/s00418-015-1385-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/29/2015] [Indexed: 10/22/2022]
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Choi JS, Kim KH, Lau LF. The matricellular protein CCN1 promotes mucosal healing in murine colitis through IL-6. Mucosal Immunol 2015; 8:1285-96. [PMID: 25807183 DOI: 10.1038/mi.2015.19] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Accepted: 02/10/2015] [Indexed: 02/04/2023]
Abstract
The matricellular protein CCN1 (CYR61) is known to function in wound healing and is upregulated in colons of patients with Crohn's disease and ulcerative colitis, yet its specific role in colitis is unknown. Here we have used Ccn1(dm/dm) knockin mice expressing a CCN1 mutant unable to bind integrins α6β1 and αMβ2 as a model to probe CCN1 function in dextran sodium sulfate (DSS)-induced colitis. Ccn1(dm/dm) mice exhibited high mortality, impaired mucosal healing, and diminished interleukin-6 (IL-6) expression during the repair phase of DSS-induced colitis compared with wild-type mice, despite having comparable severity of initial inflammation and tissue injury. CCN1-induced IL-6 expression in macrophages through integrin αMβ2 and in fibroblasts through α6β1, and IL-6 promoted intestinal epithelial cell (IEC) proliferation. Administration of purified CCN1 protein fully rescued Ccn1(dm/dm) mice from DSS-induced mortality, restored IEC proliferation and enhanced mucosal healing, whereas delivery of IL-6 partially rectified these defects. CCN1 therapy accelerated mucosal healing and recovery from DSS-induced colitis even in wild-type mice. These findings reveal a critical role for CCN1 in restoring mucosal homeostasis after intestinal injury in part through integrin-mediated induction of IL-6 expression, and suggest a therapeutic potential for activating the CCN1/IL-6 axis for treating inflammatory bowel disease.
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Kavuri SM, Jain N, Galimi F, Cottino F, Leto SM, Migliardi G, Searleman AC, Shen W, Monsey J, Trusolino L, Jacobs SA, Bertotti A, Bose R. HER2 activating mutations are targets for colorectal cancer treatment. Cancer Discov 2015; 5:832-41. [PMID: 26243863 PMCID: PMC4527087 DOI: 10.1158/2159-8290.cd-14-1211] [Citation(s) in RCA: 218] [Impact Index Per Article: 24.2] [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] [Indexed: 01/11/2023]
Abstract
UNLABELLED The Cancer Genome Atlas project identified HER2 somatic mutations and gene amplification in 7% of patients with colorectal cancer. Introduction of the HER2 mutations S310F, L755S, V777L, V842I, and L866M into colon epithelial cells increased signaling pathways and anchorage-independent cell growth, indicating that they are activating mutations. Introduction of these HER2 activating mutations into colorectal cancer cell lines produced resistance to cetuximab and panitumumab by sustaining MAPK phosphorylation. HER2 mutants are potently inhibited by low nanomolar doses of the irreversible tyrosine kinase inhibitors neratinib and afatinib. HER2 gene sequencing of 48 cetuximab-resistant, quadruple (KRAS, NRAS, BRAF, and PIK3CA) wild-type (WT) colorectal cancer patient-derived xenografts (PDX) identified 4 PDXs with HER2 mutations. HER2-targeted therapies were tested on two PDXs. Treatment with a single HER2-targeted drug (trastuzumab, neratinib, or lapatinib) delayed tumor growth, but dual HER2-targeted therapy with trastuzumab plus tyrosine kinase inhibitors produced regression of these HER2-mutated PDXs. SIGNIFICANCE HER2 activating mutations cause EGFR antibody resistance in colorectal cell lines, and PDXs with HER2 mutations show durable tumor regression when treated with dual HER2-targeted therapy. These data provide a strong preclinical rationale for clinical trials targeting HER2 activating mutations in metastatic colorectal cancer.
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Affiliation(s)
- Shyam M Kavuri
- Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Naveen Jain
- Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Francesco Galimi
- Department of Oncology, University of Torino Medical School, Torino, Italy. Translational Cancer Medicine, Candiolo Cancer Institute - FPO IRCCS, Torino, Italy
| | - Francesca Cottino
- Translational Cancer Medicine, Candiolo Cancer Institute - FPO IRCCS, Torino, Italy
| | - Simonetta M Leto
- Department of Oncology, University of Torino Medical School, Torino, Italy. Translational Cancer Medicine, Candiolo Cancer Institute - FPO IRCCS, Torino, Italy
| | - Giorgia Migliardi
- Department of Oncology, University of Torino Medical School, Torino, Italy. Translational Cancer Medicine, Candiolo Cancer Institute - FPO IRCCS, Torino, Italy
| | - Adam C Searleman
- Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Wei Shen
- Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - John Monsey
- Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Livio Trusolino
- Department of Oncology, University of Torino Medical School, Torino, Italy. Translational Cancer Medicine, Candiolo Cancer Institute - FPO IRCCS, Torino, Italy
| | | | - Andrea Bertotti
- Department of Oncology, University of Torino Medical School, Torino, Italy. Translational Cancer Medicine, Candiolo Cancer Institute - FPO IRCCS, Torino, Italy. National Institute of Biostructures and Biosystems, Rome, Italy.
| | - Ron Bose
- Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri. Alvin J. Siteman Cancer Center, Washington University School of Medicine, St. Louis, Missouri.
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