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Komisarska P, Pinyosinwat A, Saleem M, Szczuko M. Carrageenan as a Potential Factor of Inflammatory Bowel Diseases. Nutrients 2024; 16:1367. [PMID: 38732613 PMCID: PMC11085445 DOI: 10.3390/nu16091367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 04/23/2024] [Accepted: 04/29/2024] [Indexed: 05/13/2024] Open
Abstract
Carrageenan is a widely used food additive and is seen as a potential candidate in the pharmaceutical industry. However, there are two faces to carrageenan that allows it to be used positively for therapeutic purposes. Carrageenan can be used to create edible films and for encapsulating drugs, and there is also interest in the use of carrageenan for food printing. Carrageenan is a naturally occurring polysaccharide gum. Depending on the type of carrageenan, it is used in regulating the composition of intestinal microflora, including the increase in the population of Bifidobacterium bacteria. On the other hand, the studies have demonstrated the harmfulness of carrageenan in animal and human models, indicating a direct link between diet and intestinal inflammatory states. Carrageenan changes the intestinal microflora, especially Akkermansia muciniphilia, degrades the mucous barrier and breaks down the mucous barrier, causing an inflammatory reaction. It directly affects epithelial cells by activating the pro-inflammatory nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB) pathway. The mechanism is based on activation of the TLR4 receptor, alterations in macrophage activity, production of proinflammatory cytokines and activation of innate immune pathways. Carrageenan increases the content of Bacteroidetes bacteria, also causing a reduction in the number of short chain fatty acid (SCFA)-producing bacteria. The result is damage to the integrity of the intestinal membrane and reduction of the mucin layer. The group most exposed to the harmful effects of carrageenan are people suffering from intestinal inflammation, including Crohn disease (CD) and ulcerative colitis (UC).
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Affiliation(s)
| | | | | | - Małgorzata Szczuko
- Department of Human Nutrition and Metabolomics, Pomeranian Medical University, 71-460 Szczecin, Poland (M.S.)
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Guo J, Shang X, Chen P, Huang X. How does carrageenan cause colitis? A review. Carbohydr Polym 2023; 302:120374. [PMID: 36604052 DOI: 10.1016/j.carbpol.2022.120374] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 11/22/2022]
Abstract
Carrageenan is a common additive, but mounting studies have reported that it may cause or aggravate inflammation in the intestines. The safety of carrageenan remains controversial and its inflammatory mechanisms are unclear. In this review, the pathogenesis of colitis by carrageenans was discussed. We analyzed the pathogenesis of inflammatory bowel disease, followed that line of thought, the existing evidence of carrageenans causing colitis in cellular and animal models was summarized to draw its colitis pathogenesis. Two pathways were described including: 1) carrageenan changed the composition of intestinal microbiota, especially Akkermansia muciniphila, which destroyed the mucosal barrier and triggered the inflammatory immune response; and 2) carrageenan directly contacted with receptors on epithelial cells and activated the NF-κB inflammatory pathway. This review aim to provide guidance for exploring the treatment of colitis caused by carrageenan, and safe processing and utilization of carrageenan in food industry, which is worthy of study in the future.
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Affiliation(s)
- Juanjuan Guo
- College of Oceanology and Food Sciences, Quanzhou Normal University, Quanzhou, Fujian 362000, China; College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
| | - Xuke Shang
- College of Oceanology and Food Sciences, Quanzhou Normal University, Quanzhou, Fujian 362000, China; College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Peilin Chen
- College of Oceanology and Food Sciences, Quanzhou Normal University, Quanzhou, Fujian 362000, China
| | - Xiaozhou Huang
- College of Oceanology and Food Sciences, Quanzhou Normal University, Quanzhou, Fujian 362000, China
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3
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Ramakrishnan RK, Bajbouj K, Guimei M, Rawat SS, Kalaji Z, Hachim MY, Mahboub B, Ibrahim SM, Hamoudi R, Halwani R, Hamid Q. Bcl10 Regulates Lipopolysaccharide-Induced Pro-Fibrotic Signaling in Bronchial Fibroblasts from Severe Asthma Patients. Biomedicines 2022; 10:biomedicines10071716. [PMID: 35885021 PMCID: PMC9312497 DOI: 10.3390/biomedicines10071716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/24/2022] [Accepted: 06/30/2022] [Indexed: 11/17/2022] Open
Abstract
Subepithelial fibrosis is a characteristic hallmark of airway remodeling in asthma. Current asthma medications have limited efficacy in treating fibrosis, particularly in patients with severe asthma, necessitating a deeper understanding of the fibrotic mechanisms. The NF-κB pathway is key to airway inflammation in asthma, as it regulates the activity of multiple pro-inflammatory mediators that contribute to airway pathology. Bcl10 is a well-known upstream mediator of the NF-κB pathway that has been linked to fibrosis in other disease models. Therefore, we investigated Bcl10-mediated NF-κB activation as a potential pathway regulating fibrotic signaling in severe asthmatic fibroblasts. We demonstrate here the elevated protein expression of Bcl10 in bronchial fibroblasts and bronchial biopsies from severe asthmatic patients when compared to non-asthmatic individuals. Lipopolysaccharide (LPS) induced the increased expression of the pro-fibrotic cytokines IL-6, IL-8 and TGF-β1 in bronchial fibroblasts, and this induction was associated with the activation of Bcl10. Inhibition of the Bcl10-mediated NF-κB pathway using an IRAK1/4 selective inhibitor abrogated the pro-fibrotic signaling induced by LPS. Thus, our study indicates that Bcl10-mediated NF-κB activation signals increased pro-fibrotic cytokine expression in severe asthmatic airways. This reveals the therapeutic potential of targeting Bcl10 signaling in ameliorating inflammation and fibrosis, particularly in severe asthmatic individuals.
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Affiliation(s)
- Rakhee K. Ramakrishnan
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates; (R.K.R.); (K.B.); (Z.K.); (B.M.); (S.M.I.)
| | - Khuloud Bajbouj
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates; (R.K.R.); (K.B.); (Z.K.); (B.M.); (S.M.I.)
| | - Maha Guimei
- Department of Pathology, Faculty of Medicine, Alexandria University, Alexandria 21526, Egypt;
| | - Surendra Singh Rawat
- College of Medicine, Mohammed Bin Rashid University, Dubai P.O. Box 505055, United Arab Emirates; (S.S.R.); (M.Y.H.)
| | - Zaina Kalaji
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates; (R.K.R.); (K.B.); (Z.K.); (B.M.); (S.M.I.)
| | - Mahmood Y. Hachim
- College of Medicine, Mohammed Bin Rashid University, Dubai P.O. Box 505055, United Arab Emirates; (S.S.R.); (M.Y.H.)
| | - Bassam Mahboub
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates; (R.K.R.); (K.B.); (Z.K.); (B.M.); (S.M.I.)
- Rashid Hospital, Dubai Health Authority, Dubai P.O. Box 4545, United Arab Emirates
| | - Saleh M. Ibrahim
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates; (R.K.R.); (K.B.); (Z.K.); (B.M.); (S.M.I.)
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, 23562 Lübeck, Germany
| | - Rifat Hamoudi
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates; (R.K.R.); (K.B.); (Z.K.); (B.M.); (S.M.I.)
- Division of Surgery and Interventional Science, University College London, London WC1E 6BT, UK
- Correspondence: (R.H.); (R.H.); (Q.H.)
| | - Rabih Halwani
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates; (R.K.R.); (K.B.); (Z.K.); (B.M.); (S.M.I.)
- Immunology Research Lab, College of Medicine, King Saud University, Riyadh P.O. Box 145111, Saudi Arabia
- Correspondence: (R.H.); (R.H.); (Q.H.)
| | - Qutayba Hamid
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates; (R.K.R.); (K.B.); (Z.K.); (B.M.); (S.M.I.)
- Meakins-Christie Laboratories, McGill University, Montreal, QC H3A 0G4, Canada
- Correspondence: (R.H.); (R.H.); (Q.H.)
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Zhang Y, Wang X, Wang S, Yan Z, Li C, Zheng Y, Cui L. Heat Shock Protein 27 Regulates the Inflammatory Response of Intestinal Epithelial Cells by the Nuclear Factor-κB Pathway. Dig Dis Sci 2020; 65:3514-3520. [PMID: 32078087 DOI: 10.1007/s10620-020-06074-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 01/12/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND The specific and accurate pathogenesis of diarrhea-type irritable bowel syndrome is still unclear. AIMS We explored the mechanism of heat shock protein 27 (HSP27) in diarrhea-type irritable bowel syndrome to identify the key targets for the disease. METHODS The human colonic epithelial cell lines Caco-2 and NCM460 were pretreated with KRIBB3 (a phosphorylation inhibitor of HSP27) and then stimulated with lipopolysaccharide for different times. The apoptosis ratios of Caco-2 and NCM460 cells were examined with Annexin V/PI assays. Cell growth was determined using the cell counting kit-8 assay, and the expression levels of IL-1β and IL-6 in the cell supernatant were analyzed by ELISA. In addition, the expression levels of HSP27 and the nuclear factor-κB (NF-κB) signaling pathway were examined by Western blot assay. RESULTS Stimulation with lipopolysaccharide promoted the expression of HSP27 in colonic epithelial cells. HSP27 was phosphorylated at serine 78 and 82 after exposure to LPS. Apoptosis, growth inhibition, and inflammatory factor expression of lipopolysaccharide-induced colonic epithelial cells were greatly exacerbated by KRIBB3 treatment. In addition, KRIBB3 inhibited the phosphorylation of IκB-α and the activation of NF-κB. Gene silencing by small interfering RNA indicated that phosphorylation of HSP27 may regulate the NF-κB pathway. CONCLUSIONS HSP27 plays an important role in the inflammatory response of intestinal human colonic epithelial cells. HSP27 may protect intestinal epithelial cells against damage by regulating the NF-κB pathway.
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Affiliation(s)
- Yajun Zhang
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510280, Guangdong Province, China.,Department of Gastroenterology, The Sixth Medical Center, PLA General Hospital, NO. 6 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Xiaohui Wang
- Department of Gastroenterology, The Sixth Medical Center, PLA General Hospital, NO. 6 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Shaoxin Wang
- Department of Gastroenterology, The Sixth Medical Center, PLA General Hospital, NO. 6 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Zhihui Yan
- Department of Gastroenterology, The Sixth Medical Center, PLA General Hospital, NO. 6 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Chao Li
- Department of Gastroenterology, The Sixth Medical Center, PLA General Hospital, NO. 6 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Yan Zheng
- Department of Gastroenterology, The Sixth Medical Center, PLA General Hospital, NO. 6 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Lihong Cui
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510280, Guangdong Province, China. .,Department of Gastroenterology, The Sixth Medical Center, PLA General Hospital, NO. 6 Fucheng Road, Haidian District, Beijing, 100048, China.
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Semi-refined carrageenan promotes generation of reactive oxygen species in leukocytes of rats upon oral exposure but not in vitro. Wien Med Wochenschr 2020; 171:68-78. [PMID: 33108805 DOI: 10.1007/s10354-020-00786-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Accepted: 09/28/2020] [Indexed: 12/19/2022]
Abstract
AIM To assess the ability of the common food additive E407a (semi-refined carrageenan) to enter leukocytes in vitro and generate reactive oxygen species (ROS) in leukocytes as a whole and granulocytes in particular, both during incubation and in experimental animals. METHODS ROS production was assessed in leukocytes incubated with E407a for 2 h at the final concentrations of 5 and 10 g/L using the dye 2',7'-dichlorodihydrofluorescein diacetate (H2DCFDA), as well as in cells isolated from rats orally exposed to E407a (140 mg/kg of weight) during 2 weeks (n = 8) and control rats (n = 8), by flow cytometry. Carrageenan uptake by leukocytes was estimated by confocal microscopy using incubation of rhodamine B isothiocyanate-labelled carrageenan with leukocyte suspensions. RESULTS Uptake of carrageenan by viable neutrophils, monocytes, and lymphocytes was confirmed. Oral administration of the food additive E407a was associated with excessive ROS formation by viable leukocytes (CD45+, 7‑aminoactinomycin D- cells) and especially in granulocytes. Unexpectedly, a direct impact of semi-refined carrageenan during incubation for 2 h did not affect ROS production in leukocytes, evidenced by statistically insignificant differences in mean fluorescence intensity values of 2',7'-dichlorofluorescein, which is a ROS-sensitive product of intracellular H2DCFDA conversion. Oral intake of E407a and direct exposure of leukocyte suspensions to it decreased the viability of leukocytes. CONCLUSION Food-grade carrageenan can enter leukocytes without affecting ROS generation as a result of incubation for 2 h with leukocyte suspensions. On the contrary, oral exposure to E407a is accompanied by ROS overproduction by white blood cells, suggesting an indirect mechanism for the stimulation of ROS synthesis in vivo. E407a promotes cell death of leukocytes both in vivo and in vitro.
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Wang Y, Miao X, Li H, Su P, Lin L, Liu L, Li X. The correlated expression of immune and energy metabolism related genes in the response to Salmonella enterica serovar Enteritidis inoculation in chicken. BMC Vet Res 2020; 16:257. [PMID: 32711533 PMCID: PMC7382137 DOI: 10.1186/s12917-020-02474-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 07/13/2020] [Indexed: 11/24/2022] Open
Abstract
Background Salmonella enterica serovar Enteritidis (SE) is one of the food-borne pathogenic bacteria, which affects poultry production and poses severe threat to human health. The correlation of immune system and metabolism in chicken after SE inoculation is important but not clear. In the current study, we identified the expression of immune and energy metabolism related genes using quantitative PCR to evaluate the correlation between immune system and energy metabolism against SE inoculation in Jining Bairi chicken. Results ATP5G1, ATP5G3 and ND2 were significantly up-regulated at 1 dpi (day post inoculation), and ATP5E, ATP5G1, ATP5G3 were significantly down-regulated at 7 dpi (P < 0.05). IL-8 and IL-1β were significantly down-regulated at 1 dpi, IL-8 and IL-18 were significantly down-regulated at 3 dpi, IL-8 and BCL10 were significantly up-regulated at 7 dpi (P < 0.05). Conclusions These findings indicate that the correlation between immune and energy metabolism related genes gradually change with time points post SE inoculation, from one homeostasis to an opposite homeostasis with 3 dpi as a turning point. These results will pave the foundation for the relationship between immune system and energy metabolism in the response to SE inoculation in chicken.
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Affiliation(s)
- Yuanmei Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 271018, Taian, China.,Present Address: Current affiliation: Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, 100193, Beijing, China
| | - Xiuxiu Miao
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 271018, Taian, China
| | - Huilong Li
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 271018, Taian, China
| | - Pengcheng Su
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 271018, Taian, China
| | - Lili Lin
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 271018, Taian, China
| | - Liying Liu
- College of Life Science, Shandong Agricultural University, 271018, Taian, China.
| | - Xianyao Li
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 271018, Taian, China.
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Papafilippou L, Claxton A, Dark P, Kostarelos K, Hadjidemetriou M. Protein corona fingerprinting to differentiate sepsis from non-infectious systemic inflammation. NANOSCALE 2020; 12:10240-10253. [PMID: 32356537 DOI: 10.1039/d0nr02788j] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Rapid and accurate diagnosis of sepsis remains clinically challenging. The lack of specific biomarkers that can differentiate sepsis from non-infectious systemic inflammatory diseases often leads to excessive antibiotic treatment. Novel diagnostic tests are urgently needed to rapidly and accurately diagnose sepsis and enable effective treatment. Despite investment in cutting-edge technologies available today, the discovery of disease-specific biomarkers in blood remains extremely difficult. The highly dynamic environment of plasma restricts access to vital diagnostic information that can be obtained by proteomic analysis. Here, we employed clinically used lipid-based nanoparticles (AmBisome®) as an enrichment platform to analyze the human plasma proteome in the setting of sepsis. We exploited the spontaneous interaction of plasma proteins with nanoparticles (NPs) once in contact, called the 'protein corona', to discover previously unknown disease-specific biomarkers for sepsis diagnosis. Plasma samples obtained from non-infectious acute systemic inflammation controls and sepsis patients were incubated ex vivo with AmBisome® liposomes, and the resultant protein coronas were thoroughly characterised and compared by mass spectrometry (MS)-based proteomics. Our results demonstrate that the proposed nanoparticle enrichment technology enabled the discovery of 67 potential biomarker proteins that could reproducibly differentiate non-infectious acute systemic inflammation from sepsis. This study provides proof-of-concept evidence that nanoscale-based 'omics' enrichment technologies have the potential to substantially improve plasma proteomics analysis and to uncover novel biomarkers in a challenging clinical setting.
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Affiliation(s)
- Lana Papafilippou
- Nanomedicine Lab, Faculty of Biology, Medicine & Health, AV Hill Building, The University of Manchester, Manchester, M13 9PT, UK.
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Van Den Rym A, Taur P, Martinez-Barricarte R, Lorenzo L, Puel A, Gonzalez-Navarro P, Pandrowala A, Gowri V, Safa A, Toledano V, Cubillos-Zapata C, López-Collazo E, Vela M, Pérez-Martínez A, Sánchez-Ramón S, Recio MJ, Casanova JL, Desai MM, Perez de Diego R. Human BCL10 Deficiency due to Homozygosity for a Rare Allele. J Clin Immunol 2020; 40:388-398. [PMID: 32008135 DOI: 10.1007/s10875-020-00760-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 01/23/2020] [Indexed: 12/30/2022]
Abstract
In 2014, a child with broad combined immunodeficiency (CID) who was homozygous for a private BCL10 allele was reported to have complete inherited human BCL10 deficiency. In the present study, we report a new BCL10 mutation in another child with CID who was homozygous for a BCL10 variant (R88X), previously reported as a rare allele in heterozygosis (minor allele frequency, 0.000003986). The mutant allele was a loss-of-expression and loss-of-function allele. As with the previously reported patient, this patient had complete BCL10 deficiency. The clinical phenotype shared features, such as respiratory infections, but differed from that of the previous patient that he did not develop significant gastroenteritis episodes or chronic colitis. Cellular and immunological phenotypes were similar to those of the previous patient. TLR4, TLR2/6, and Dectin-1 responses were found to depend on BCL10 in fibroblasts, and final maturation of T cell and B cell maturation into memory cells was affected. Autosomal-recessive BCL10 deficiency should therefore be considered in children with CID.
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Affiliation(s)
- Ana Van Den Rym
- Laboratory of Immunogenetics of Human Diseases, IdiPAZ Institute for Health Research, La Paz Hospital, 28046, Madrid, Spain
- Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz Hospital, 28046, Madrid, Spain
- Interdepartmental Group of Immunodeficiencies, Madrid, Spain
| | - Prasad Taur
- Division of Immunology, Bai Jerbai Wadia Hospital for Children, Parel, Mumbai, 400012, India
| | - Rubén Martinez-Barricarte
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, 10065, USA
| | - Lazaro Lorenzo
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale U1163, 75015, Paris, France
| | - Anne Puel
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, 10065, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale U1163, 75015, Paris, France
- Imagine Institute, University Paris Descartes, 75015, Paris, France
| | - Pablo Gonzalez-Navarro
- Laboratory of Immunogenetics of Human Diseases, IdiPAZ Institute for Health Research, La Paz Hospital, 28046, Madrid, Spain
- Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz Hospital, 28046, Madrid, Spain
- Interdepartmental Group of Immunodeficiencies, Madrid, Spain
| | - Ambreen Pandrowala
- Division of Immunology, Bai Jerbai Wadia Hospital for Children, Parel, Mumbai, 400012, India
| | - Vijaya Gowri
- Division of Immunology, Bai Jerbai Wadia Hospital for Children, Parel, Mumbai, 400012, India
| | - Amin Safa
- Laboratory of Immunogenetics of Human Diseases, IdiPAZ Institute for Health Research, La Paz Hospital, 28046, Madrid, Spain
- Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz Hospital, 28046, Madrid, Spain
- Interdepartmental Group of Immunodeficiencies, Madrid, Spain
- Department of Immunology, Ophthalmology and ENT, School of Medicine, Complutense University, 28040, Madrid, Spain
| | - Victor Toledano
- Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz Hospital, 28046, Madrid, Spain
| | - Carolina Cubillos-Zapata
- Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz Hospital, 28046, Madrid, Spain
- Center for Biomedical Research Network, CIBEres, Madrid, Spain
| | - Eduardo López-Collazo
- Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz Hospital, 28046, Madrid, Spain
| | - Maria Vela
- Translational Research in Paediatric Oncology, Haematopoietic Stem Cell Transplantation, Cell Therapy, INGEMM-IdiPAZ, La Paz University Hospital, Madrid, Spain
| | - Antonio Pérez-Martínez
- Translational Research in Paediatric Oncology, Haematopoietic Stem Cell Transplantation, Cell Therapy, INGEMM-IdiPAZ, La Paz University Hospital, Madrid, Spain
- Department of Paediatric Haemato-oncology and Stem Cell Transplantation, La Paz University Hospital, Madrid, Spain
| | - Silvia Sánchez-Ramón
- Interdepartmental Group of Immunodeficiencies, Madrid, Spain
- Clinical Immunology Department, San Carlos Clinical Hospital, 28040, Madrid, Spain
| | - Maria J Recio
- Interdepartmental Group of Immunodeficiencies, Madrid, Spain
- Department of Immunology, Ophthalmology and ENT, School of Medicine, Complutense University, 28040, Madrid, Spain
| | - Jean-Laurent Casanova
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, 10065, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale U1163, 75015, Paris, France
- Imagine Institute, University Paris Descartes, 75015, Paris, France
- Paediatric Immunology-Hematology Unit, Necker Hospital for Sick Children, Assistance Publique-Hôpitaux de Paris (AP-HP), 75015, Paris, France
- Howard Hughes Medical Institute, New York, NY, 10065, USA
| | - Mukesh M Desai
- Division of Immunology, Bai Jerbai Wadia Hospital for Children, Parel, Mumbai, 400012, India
| | - Rebeca Perez de Diego
- Laboratory of Immunogenetics of Human Diseases, IdiPAZ Institute for Health Research, La Paz Hospital, 28046, Madrid, Spain.
- Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz Hospital, 28046, Madrid, Spain.
- Interdepartmental Group of Immunodeficiencies, Madrid, Spain.
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Zhang H, Xu CN, Mine Y. Synthetic phosphoserine dimer attenuates lipopolysaccharide‐induced inflammatory response in human intestinal epithelial cells via activation of NF‐κB and MAPKs cell signalling pathways. Int J Food Sci Technol 2020. [DOI: 10.1111/ijfs.14246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hua Zhang
- Department of Food Science University of Guelph Guelph Ontario N1G 2W1 Canada
| | - Cai Na Xu
- Department of Food Science University of Guelph Guelph Ontario N1G 2W1 Canada
| | - Yoshinori Mine
- Department of Food Science University of Guelph Guelph Ontario N1G 2W1 Canada
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Münch NS, Fang HY, Ingermann J, Maurer HC, Anand A, Kellner V, Sahm V, Wiethaler M, Baumeister T, Wein F, Einwächter H, Bolze F, Klingenspor M, Haller D, Kavanagh M, Lysaght J, Friedman R, Dannenberg AJ, Pollak M, Holt PR, Muthupalani S, Fox JG, Whary MT, Lee Y, Ren TY, Elliot R, Fitzgerald R, Steiger K, Schmid RM, Wang TC, Quante M. High-Fat Diet Accelerates Carcinogenesis in a Mouse Model of Barrett's Esophagus via Interleukin 8 and Alterations to the Gut Microbiome. Gastroenterology 2019; 157:492-506.e2. [PMID: 30998992 PMCID: PMC6662596 DOI: 10.1053/j.gastro.2019.04.013] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 04/03/2019] [Accepted: 04/06/2019] [Indexed: 01/10/2023]
Abstract
BACKGROUND & AIMS Barrett's esophagus (BE) is a precursor to esophageal adenocarcinoma (EAC). Progression from BE to cancer is associated with obesity, possibly due to increased abdominal pressure and gastroesophageal reflux disease, although this pathogenic mechanism has not been proven. We investigated whether environmental or dietary factors associated with obesity contribute to the progression of BE to EAC in mice. METHODS Tg(ED-L2-IL1RN/IL1B)#Tcw mice (a model of BE, called L2-IL1B mice) were fed a chow (control) or high-fat diet (HFD) or were crossbred with mice that express human interleukin (IL) 8 (L2-IL1B/IL8 mice). Esophageal tissues were collected and analyzed for gene expression profiles and by quantitative polymerase chain reaction, immunohistochemistry, and flow cytometry. Organoids were established from BE tissue of mice and cultured with serum from lean or obese individuals or with neutrophils from L2-IL1B mice. Feces from mice were analyzed by 16s ribosomal RNA sequencing and compared to 16s sequencing data from patients with dysplasia or BE. L2-IL1B were mice raised in germ-free conditions. RESULTS L2-IL1B mice fed an HFD developed esophageal dysplasia and tumors more rapidly than mice fed the control diet; the speed of tumor development was independent of body weight. The acceleration of dysplasia by the HFD in the L2-IL1B mice was associated with a shift in the gut microbiota and an increased ratio of neutrophils to natural killer cells in esophageal tissues compared with mice fed a control diet. We observed similar differences in the microbiomes from patients with BE that progressed to EAC vs patients with BE that did not develop into cancer. Tissues from dysplasias of L2-IL1B mice fed the HFD contained increased levels of cytokines that are produced in response to CXCL1 (the functional mouse homolog of IL8, also called KC). Serum from obese patients caused organoids from L2-IL1B/IL8 mice to produce IL8. BE tissues from L2-IL1B mice fed the HFD and from L2-IL1B/IL8 mice contained increased numbers of myeloid cells and cells expressing Cxcr2 and Lgr5 messenger RNAs (epithelial progenitors) compared with mice fed control diets. BE tissues from L2-IL1B mice raised in germ-free housing had fewer progenitor cells and developed less dysplasia than in L2-IL1 mice raised under standard conditions; exposure of fecal microbiota from L2-IL1B mice fed the HFD to L2-IL1B mice fed the control diet accelerated tumor development. CONCLUSIONS In a mouse model of BE, we found that an HFD promoted dysplasia by altering the esophageal microenvironment and gut microbiome, thereby inducing inflammation and stem cell expansion, independent of obesity.
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Affiliation(s)
- Natasha Stephens Münch
- Department of Internal Medicine, Technical University of Munich, Germany,Chair of Molecular Nutritional Medicine, Technical University of Munich, Germany
| | - Hsin-Yu Fang
- Department of Internal Medicine, Technical University of Munich, Germany
| | - Jonas Ingermann
- Department of Internal Medicine, Technical University of Munich, Germany,Chair of Molecular Nutritional Medicine, Technical University of Munich, Germany
| | - H. Carlo Maurer
- Department of Internal Medicine, Technical University of Munich, Germany,Irvine Cancer Research Center, Columbia University, New York, USA
| | - Akanksha Anand
- Department of Internal Medicine, Technical University of Munich, Germany
| | - Victoria Kellner
- Department of Internal Medicine, Technical University of Munich, Germany
| | - Vincenz Sahm
- Department of Internal Medicine, Technical University of Munich, Germany
| | - Maria Wiethaler
- Department of Internal Medicine, Technical University of Munich, Germany
| | - Theresa Baumeister
- Department of Internal Medicine, Technical University of Munich, Germany
| | - Frederik Wein
- Department of Internal Medicine, Technical University of Munich, Germany
| | - Henrik Einwächter
- Department of Internal Medicine, Technical University of Munich, Germany
| | - Florian Bolze
- Chair of Molecular Nutritional Medicine, Technical University of Munich, Germany,EKFZ – Else Kröner-Fresenius Center for Nutritional Medicine, Technical University of Munich, Germany,ZIEL – Institute of Food & Health, Technical University of Munich, Germany
| | - Martin Klingenspor
- Chair of Molecular Nutritional Medicine, Technical University of Munich, Germany,EKFZ – Else Kröner-Fresenius Center for Nutritional Medicine, Technical University of Munich, Germany,ZIEL – Institute of Food & Health, Technical University of Munich, Germany
| | - Dirk Haller
- Chair of Nutrition and Immunology; Technical University of Munich, Germany
| | - Maria Kavanagh
- Department of Surgery, Trinity Translational Medicine Institute, Trinity College Dublin, Ireland
| | - Joanne Lysaght
- Department of Surgery, Trinity Translational Medicine Institute, Trinity College Dublin, Ireland
| | - Richard Friedman
- Irvine Cancer Research Center, Columbia University, New York, USA
| | | | | | | | | | - James G. Fox
- Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Mark T. Whary
- Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Yoomi Lee
- Irvine Cancer Research Center, Columbia University, New York, USA
| | - Tony Y. Ren
- Irvine Cancer Research Center, Columbia University, New York, USA
| | | | | | - Katja Steiger
- Institute of Pathology, Technical University of Munich, Germany
| | - Roland M. Schmid
- Department of Internal Medicine, Technical University of Munich, Germany
| | - Timothy C. Wang
- Irvine Cancer Research Center, Columbia University, New York, USA
| | - Michael Quante
- Department of Internal Medicine, Technical University of Munich, Germany.
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11
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Gehring T, Seeholzer T, Krappmann D. BCL10 - Bridging CARDs to Immune Activation. Front Immunol 2018; 9:1539. [PMID: 30022982 PMCID: PMC6039553 DOI: 10.3389/fimmu.2018.01539] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 06/21/2018] [Indexed: 11/25/2022] Open
Abstract
Since the B-cell lymphoma/leukemia 10 (BCL10) protein was first described in 1999, numerous studies have elucidated its key functions in channeling adaptive and innate immune signaling downstream of CARMA/caspase-recruitment domain (CARD) scaffold proteins. While T and B cell antigen receptor (TCR/BCR) signaling induces the recruitment of BCL10 bound to mucosa-associated lymphoid tissue (MALT)1 to the lymphocyte-specific CARMA1/CARD11–BCL10–MALT1 (CBM-1) signalosome, alternative CBM complexes utilize different CARMA/CARD scaffolds in distinct innate or inflammatory pathways. BCL10 constitutes the smallest subunit in all CBM signalosomes, containing a 233 amino acid coding for N-terminal CARD as well as a C-terminal Ser/Thr-rich region. BCL10 forms filaments, thereby aggregating into higher-order clusters that mediate and amplify stimulation-induced signals, ultimately leading to MALT1 protease activation and canonical NF-κB and JNK signaling. BCL10 additionally undergoes extensive post-translational regulation involving phosphorylation, ubiquitination, MALT1-catalyzed cleavage, and degradation. Through these feedback and feed-forward events, BCL10 integrates positive and negative regulatory processes that govern the function as well as the dynamic assembly, disassembly, and destruction of CBM complexes. Thus, BCL10 is a critical regulator for activation as well as termination of immune cell signaling, revealing that its role extends far beyond that of a mere linking factor in CBM complexes.
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Affiliation(s)
- Torben Gehring
- Research Unit Cellular Signal Integration, Institute of Molecular Toxicology and Pharmacology, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - Thomas Seeholzer
- Research Unit Cellular Signal Integration, Institute of Molecular Toxicology and Pharmacology, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - Daniel Krappmann
- Research Unit Cellular Signal Integration, Institute of Molecular Toxicology and Pharmacology, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
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12
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Scudiero I, Mazzone P, D'Andrea LE, Ferravante A, Zotti T, Telesio G, De Rubis G, Reale C, Pizzulo M, Muralitharan S, Vito P, Stilo R. CARMA2sh and ULK2 control pathogen-associated molecular patterns recognition in human keratinocytes: psoriasis-linked CARMA2sh mutants escape ULK2 censorship. Cell Death Dis 2017; 8:e2627. [PMID: 28230860 PMCID: PMC5386493 DOI: 10.1038/cddis.2017.51] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 01/18/2017] [Accepted: 01/24/2017] [Indexed: 12/26/2022]
Abstract
The molecular complexes formed by specific members of the family of CARMA proteins, the CARD domain-containing adapter molecule BCL10 and MALT1 (CBM complex) represent a central hub in regulating activation of the pleiotropic transcription factor NF-κB. Recently, missense mutations in CARMA2sh have been shown to cause psoriasis in a dominant manner and with high penetrancy. Here, we demonstrate that in human keratinocytes CARMA2sh plays an essential role in the signal transduction pathway that connects pathogen-associated molecular patterns recognition to NF-κB activation. We also find that the serine/threonine kinase ULK2 binds to and phosphorylates CARMA2sh, thereby inhibiting its capacity to activate NF-κB by promoting lysosomal degradation of BCL10, which is essential for CARMA2sh-mediated NF-κB signaling. Remarkably, CARMA2sh mutants associated with psoriasis escape ULK2 inhibition. Finally, we show that a peptide blocking CARD-mediated BCL10 interactions reduces the capacity of psoriasis-linked CARMA2sh mutants to activate NF-κB. Our work elucidates a fundamental signaling mechanism operating in human keratinocytes and opens to novel potential tools for the therapeutical treatment of human skin disorders.
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Affiliation(s)
| | | | | | | | - Tiziana Zotti
- Genus Biotechnology, Universita' del Sannio, Via Port'Arsa 10, Benevento, Italy
| | | | | | - Carla Reale
- Biogem, Via Camporeale, Ariano Irpino, Italy
| | | | | | - Pasquale Vito
- Biogem, Via Camporeale, Ariano Irpino, Italy.,Dipartimento di Scienze e Tecnologie, Università del Sannio, Via Port'Arsa 10, Benevento, Italy
| | - Romania Stilo
- Biogem, Via Camporeale, Ariano Irpino, Italy.,Dipartimento di Scienze e Tecnologie, Università del Sannio, Via Port'Arsa 10, Benevento, Italy
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13
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Wu G, Qi Y, Liu X, Yang N, Xu G, Liu L, Li X. Cecal MicroRNAome response to Salmonella enterica serovar Enteritidis infection in White Leghorn Layer. BMC Genomics 2017; 18:77. [PMID: 28086873 PMCID: PMC5237128 DOI: 10.1186/s12864-016-3413-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 12/12/2016] [Indexed: 01/27/2023] Open
Abstract
Background Salmonella enterica serovar Enteritidis (SE) is a food-borne pathogen and of great threat to human health through consuming the contaminated poultry products. MicroRNAs (miRNAs) play an important role in different biological activities and have been shown to regulate the innate immunity in the bacterial infection. The objective of this study is to identify miRNAs associated with SE infection in laying chicken cecum. Results Average number of reads of three libraries constructed from infected and non-infected chickens was 12,476,156 and 10,866,976, respectively. There were 598 miRNAs including 194 potential novel miRNAs identified in which 37 miRNAs were significantly differentially expressed between infected and non-infected chickens. In total, 2897 unique target genes regulated by differentially expressed miRNAs were predicted, in which, 841 genes were uniquely regulated by up-regulated miRNAs (G1), 636 genes were uniquely regulated by down-regulated miRNAs (G2), and 1420 were co-regulated by both up and down- regulated miRNAs (G3). There were 118, 73 and 178 GO (Gene ontology) BP (Biological process) terms significantly enriched in G1, G2 and G3 groups, respectively. More immune-related GO BP terms than metabolism-related terms were found in G1. Expression of 12 immune-related genes of four differentially expressed miRNAs was detected through qRT-PCR. The regulatory direction of gga-miR-1416-5p, gga-miR-1662, and gga-miR-34a-5p were opposite with the target genes of TLR21, BCL10, TLR1LA, NOTCH2 and THBS1, respectively. Conclusion The miRNAs contribute to the response to SE infection at the onset of egg laying through regulating the homeostasis between metabolism and immunity. The gga-miR-125b-5p, gga-miR-34a-5p, gga-miR-1416-5p and gga-miR-1662 could play an important role in SE infection through regulating their target genes. The finding herein will pave the foundation for the studies of microRNA regulation in SE infection in laying hens. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-3413-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Guixian Wu
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Yukai Qi
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Xiaoyi Liu
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Ning Yang
- College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Guiyun Xu
- College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Liying Liu
- College of Life Science, Shandong Agricultural University, Tai'an, Shandong, 271018, China.
| | - Xianyao Li
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, Shandong, 271018, China. .,Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, Shandong, 271018, China.
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14
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κ-Carrageenan Enhances Lipopolysaccharide-Induced Interleukin-8 Secretion by Stimulating the Bcl10-NF- κB Pathway in HT-29 Cells and Aggravates C. freundii-Induced Inflammation in Mice. Mediators Inflamm 2017; 2017:8634865. [PMID: 28163398 PMCID: PMC5253498 DOI: 10.1155/2017/8634865] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 08/07/2016] [Accepted: 11/13/2016] [Indexed: 12/22/2022] Open
Abstract
Background. The dietary usage of carrageenan as common food additive has increased observably over the last 50 years. But there is substantial controversy about its safety. Methods. We investigated whether the κ-carrageenan could enhance lipopolysaccharide-induced IL-8 expression by studying its actions on the TLR4-NF-κB pathway. The aggravating effect of κ-carrageenan on Citrobacter freundii DBS100-induced intestinal inflammation was also investigated in a mouse model. Results. Our data show that κ-carrageenan pretreatment promoted LPS-induced IL-8 expression in HT-29 cells. Although CD14, MD-2, and TLR4 were upregulated, the binding of LPS was not enhanced. However, the pathway of Bcl10-NF-κB was triggered. Interestingly, κ-carrageenan competitively blocked the binding of FITC-LPS. Furthermore, pretreatment with κ-carrageenan for one week previous to gavage with C. freundii DBS100 markedly aggravated weight loss, mortality, and colonic damage. The secretion of cytokines was unbalanced and the ratio of Tregs was decreased significantly. In addition, κ-carrageenan, together with C. freundii DBS100, enhanced the transcription and secretion of TLR4 and NF-κB. Conclusions. κ-Carrageenan can synergistically activate LPS-induced inflammatory through the Bcl10-NF-κB pathway, as indicated by its aggravation of C. freundii DBS100-induced colitis in mice. General Significance. Our results suggest that κ-carrageenan serves as a potential inflammatory agent that magnifies existing intestinal inflammation.
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15
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Kluess JW, Kahlert S, Kröber A, Diesing AK, Rothkötter HJ, Wimmers K, Dänicke S. Deoxynivalenol, but not E. coli lipopolysaccharide, changes the response pattern of intestinal porcine epithelial cells (IPEC-J2) according to its route of application. Toxicol Lett 2015; 239:161-71. [PMID: 26417708 DOI: 10.1016/j.toxlet.2015.09.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 09/23/2015] [Accepted: 09/24/2015] [Indexed: 01/21/2023]
Abstract
The porcine intestinal epithelium is a primary target for mycotoxin deoxynivalenol (DON) and lipopolysaccharides (LPS). Although epithelial cells are exposed to these toxins mainly from the luminal-chyme compartment an exposure from the blood side resulting from systemic absorption cannot be excluded. Thus, we investigated the effect of DON and LPS, alone or combined, on porcine intestinal epithelial cells IPEC-J2 on a transcriptional, translational and functional level when administered either from apical or basolateral. IPEC-J2 cells were cultured on 12-well inserts in complete medium at 5% CO2 and 39°C and subjected to following treatments: control (CON), 2000 ng/mL DON, 1 μg/mL LPS or DON+LPS for 72 h, either from apical or basolateral. Transepithelial electrical resistance (TEER), protein and IL-8 content were measured and microarray analysis, qRT-PCR (IL-8, zonula occludens-1 ZO-1, β-actin), Western Blot (ZO-1, β-actin) and immunofluorescence (ZO-1) were performed. Data of at least three independent experiments were analysed with ANOVA and Dunnett's post hoc test. Basolateral DON resulted in significantly lower cell counts (p<0.05) with larger cells (p<0.01), whereas apical DON reduced total (p<0.001) and specific protein content (IL-8 content CON vs. DON: 2378 pg/3 mL vs. 991 pg/3 mL; p<0.001). Transcripts of ß-actin and ZO-1 were significantly upregulated in response to DON, irrespective of direction, whereas IL-8 mRNA remained unaffected. However, ZO-1 spatial distribution in the tight junction and its function (TEER) were detrimentally affected by basolateral DON only. In conclusion, direction of DON exposure affected IPEC-J2 differently on a translational and functional level, but was mainly inconsequential on a transcriptional level.
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Affiliation(s)
- J W Kluess
- Institute of Animal Nutrition, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Braunschweig, Germany.
| | - S Kahlert
- Institute of Anatomy, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - A Kröber
- Institute of Anatomy, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - A-K Diesing
- Institute of Anatomy, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - H-J Rothkötter
- Institute of Anatomy, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Klaus Wimmers
- Genome Biology, Leibniz Institute for Farm Animal Biology, Dummerstorf, Germany
| | - S Dänicke
- Institute of Animal Nutrition, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Braunschweig, Germany
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16
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Pérez de Diego R, Sánchez-Ramón S, López-Collazo E, Martínez-Barricarte R, Cubillos-Zapata C, Ferreira Cerdán A, Casanova JL, Puel A. Genetic errors of the human caspase recruitment domain-B-cell lymphoma 10-mucosa-associated lymphoid tissue lymphoma-translocation gene 1 (CBM) complex: Molecular, immunologic, and clinical heterogeneity. J Allergy Clin Immunol 2015; 136:1139-49. [PMID: 26277595 DOI: 10.1016/j.jaci.2015.06.031] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 06/02/2015] [Accepted: 06/12/2015] [Indexed: 12/15/2022]
Abstract
Three members of the caspase recruitment domain (CARD) family of adaptors (CARD9, CARD10, and CARD11) are known to form heterotrimers with B-cell lymphoma 10 (BCL10) and mucosa-associated lymphoid tissue lymphoma-translocation gene 1 (MALT1). These 3 CARD-BCL10-MALT1 (CBM) complexes activate nuclear factor κB in both the innate and adaptive arms of immunity. Human inherited defects of the 3 components of the CBM complex, including the 2 adaptors CARD9 and CARD11 and the 2 core components BCL10 and MALT1, have recently been reported. Biallelic loss-of-function mutant alleles underlie several different immunologic and clinical phenotypes, which can be assigned to 2 distinct categories. Isolated invasive fungal infections of unclear cellular basis are associated with CARD9 deficiency, whereas a broad range of clinical manifestations, including those characteristic of T- and B-lymphocyte defects, are associated with CARD11, MALT1, and BCL10 deficiencies. Interestingly, human subjects with these mutations have some features in common with the corresponding knockout mice, but other features are different between human subjects and mice. Moreover, germline and somatic gain-of-function mutations of MALT1, BCL10, and CARD11 have also been found in patients with other lymphoproliferative disorders. This broad range of germline and somatic CBM lesions, including loss-of-function and gain-of-function mutations, highlights the contribution of each of the components of the CBM complex to human immunity.
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Affiliation(s)
- Rebeca Pérez de Diego
- Laboratory of Immunogenetics of Diseases, IdiPAZ Institute for Health Research, La Paz University Hospital, Madrid, Spain; Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz University Hospital, Madrid, Spain.
| | | | - Eduardo López-Collazo
- Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz University Hospital, Madrid, Spain; Laboratory of Tumor Immunology, IdiPAZ Institute for Health Research, La Paz University Hospital, Madrid, Spain
| | - Rubén Martínez-Barricarte
- St Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, Rockefeller University, New York, NY
| | - Carolina Cubillos-Zapata
- Innate Immunity Group, IdiPAZ Institute for Health Research, La Paz University Hospital, Madrid, Spain; Laboratory of Tumor Immunology, IdiPAZ Institute for Health Research, La Paz University Hospital, Madrid, Spain
| | | | - Jean-Laurent Casanova
- St Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, Rockefeller University, New York, NY; Howard Hughes Medical Institute, New York, NY; Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France; University Paris Descartes, Imagine Institute, Paris, France; Pediatric Hematology-Immunology Unit, AP-HP, Necker Hospital for Sick Children, Paris, France
| | - Anne Puel
- St Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, Rockefeller University, New York, NY; Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France; University Paris Descartes, Imagine Institute, Paris, France
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17
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Hou XF, Pan H, Xu LH, Zha QB, He XH, Ouyang DY. Piperine Suppresses the Expression of CXCL8 in Lipopolysaccharide-Activated SW480 and HT-29 Cells via Downregulating the Mitogen-Activated Protein Kinase Pathways. Inflammation 2014; 38:1093-102. [DOI: 10.1007/s10753-014-0075-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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18
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Torres JM, Martinez-Barricarte R, García-Gómez S, Mazariegos MS, Itan Y, Boisson B, Rholvarez R, Jiménez-Reinoso A, del Pino L, Rodríguez-Pena R, Ferreira A, Hernández-Jiménez E, Toledano V, Cubillos-Zapata C, Díaz-Almirón M, López-Collazo E, Unzueta-Roch JL, Sánchez-Ramón S, Regueiro JR, López-Granados E, Casanova JL, Pérez de Diego R. Inherited BCL10 deficiency impairs hematopoietic and nonhematopoietic immunity. J Clin Invest 2014; 124:5239-48. [PMID: 25365219 DOI: 10.1172/jci77493] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 10/02/2014] [Indexed: 12/12/2022] Open
Abstract
Heterotrimers composed of B cell CLL/lymphoma 10 (BCL10), mucosa-associated lymphoid tissue lymphoma translocation protein 1 (MALT1), and caspase recruitment domain-containing (CARD) family adaptors play a role in NF-κB activation and have been shown to be involved in both the innate and the adaptive arms of immunity in murine models. Moreover, individuals with inherited defects of MALT1, CARD9, and CARD11 present with immunological and clinical phenotypes. Here, we characterized a case of autosomal-recessive, complete BCL10 deficiency in a child with a broad immunodeficiency, including defects of both hematopoietic and nonhematopoietic immunity. The patient died at 3 years of age and was homozygous for a loss-of-expression, loss-of-function BCL10 mutation. The effect of BCL10 deficiency was dependent on the signaling pathway, and, for some pathways, the cell type affected. Despite the noted similarities to BCL10 deficiency in mice, including a deficient adaptive immune response, human BCL10 deficiency in this patient resulted in a number of specific features within cell populations. Treatment of the patient's myeloid cells with a variety of pathogen-associated molecular pattern molecules (PAMPs) elicited a normal response; however, NF-κB-mediated fibroblast functions were dramatically impaired. The results of this study indicate that inherited BCL10 deficiency should be considered in patients with combined immunodeficiency with B cell, T cell, and fibroblast defects.
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19
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Qiao H, Liu Y, Veach RA, Wylezinski L, Hawiger J. The adaptor CRADD/RAIDD controls activation of endothelial cells by proinflammatory stimuli. J Biol Chem 2014; 289:21973-83. [PMID: 24958727 DOI: 10.1074/jbc.m114.588723] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
A hallmark of inflammation, increased vascular permeability, is induced in endothelial cells by multiple agonists through stimulus-coupled assembly of the CARMA3 signalosome, which contains the adaptor protein BCL10. Previously, we reported that BCL10 in immune cells is targeted by the "death" adaptor CRADD/RAIDD (CRADD), which negatively regulates nuclear factor κB (NFκB)-dependent cytokine and chemokine expression in T cells (Lin, Q., Liu, Y., Moore, D. J., Elizer, S. K., Veach, R. A., Hawiger, J., and Ruley, H. E. (2012) J. Immunol. 188, 2493-2497). This novel anti-inflammatory CRADD-BCL10 axis prompted us to analyze CRADD expression and its potential anti-inflammatory action in non-immune cells. We focused our study on microvascular endothelial cells because they play a key role in inflammation. We found that CRADD-deficient murine endothelial cells display heightened BCL10-mediated expression of the pleotropic proinflammatory cytokine IL-6 and chemokine monocyte chemoattractant protein-1 (MCP-1/CCL2) in response to LPS and thrombin. Moreover, these agonists also induce significantly increased permeability in cradd(-/-), as compared with cradd(+/+), primary murine endothelial cells. CRADD-deficient cells displayed more F-actin polymerization with concomitant disruption of adherens junctions. In turn, increasing intracellular CRADD by delivery of a novel recombinant cell-penetrating CRADD protein (CP-CRADD) restored endothelial barrier function and suppressed the induction of IL-6 and MCP-1 evoked by LPS and thrombin. Likewise, CP-CRADD enhanced barrier function in CRADD-sufficient endothelial cells. These results indicate that depletion of endogenous CRADD compromises endothelial barrier function in response to inflammatory signals. Thus, we define a novel function for CRADD in endothelial cells as an inducible suppressor of BCL10, a key mediator of responses to proinflammatory agonists.
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Affiliation(s)
- Huan Qiao
- From the Departments of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine and
| | - Yan Liu
- From the Departments of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine and
| | - Ruth A Veach
- From the Departments of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine and
| | - Lukasz Wylezinski
- Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee 37232
| | - Jacek Hawiger
- From the Departments of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine and Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee 37232
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Chen H, Wang F, Mao H, Yan X. Degraded λ-carrageenan activates NF-κB and AP-1 pathways in macrophages and enhances LPS-induced TNF-α secretion through AP-1. Biochim Biophys Acta Gen Subj 2014; 1840:2162-70. [PMID: 24641824 DOI: 10.1016/j.bbagen.2014.03.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 03/07/2014] [Accepted: 03/11/2014] [Indexed: 12/27/2022]
Abstract
BACKGROUND Carrageenan (CGN), a high molecular weight sulfated polysaccharide, is a traditional ingredient used in food industry. Its degraded forms have been identified as potential carcinogens, although the mechanism remains unclear. METHODS The effects of degraded λ-carrageenan (λ-dCGN) on murine RAW264.7 cells and human THP-1-derived macrophage cells were investigated by studying its actions on tumor necrosis factor alpha (TNF-α) secretion, Toll-like receptor 4 (TLR4) expression, and activation of nuclear factor-κb (NF-κB) and activation protein-1 (AP-1) pathways. RESULTS We found that λ-dCGN was much stronger than native λ-CGN in the activation of macrophages to secrete TNF-α. Treatment of RAW264.7 cells with λ-dCGN resulted in the upregulation of TLR4, CD14 and MD-2 expressions, but it did not increase the binding of lipopolysacchride (LPS) with macrophages. Meanwhile, λ-dCGN treatment activated NF-κB via B-cell lymphoma/leukemia 10 (Bcl10) and nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, alpha (IκBα) phosphorylation. In addition, λ-dCGN induced extracellular signal-regulated kinases/1/2/mitogen-activated protein kinases (ERK1/2/MAPK) and AP-1 activation. Interestingly, pretreatment of RAW264.7 cells with λ-dCGN markedly enhanced LPS-stimulated TNF-α secretion. This pretreatment resulted in the enhanced phosphorylation of ERK1/2 and c-Jun N-terminal kinase (JNK) and intensified activation of AP-1. CONCLUSIONS λ-dCGN induced an inflammatory reaction via both NF-κB and AP-1, and enhanced the inflammatory effect of LPS through AP-1 activation. GENERAL SIGNIFICANCE The study demonstrated the role of λ-dCGN to induce the inflammatory reaction and to aggravate the effect of LPS on macrophages, suggesting that λ-dCGN produced during food processing and gastric digestion may be a safety concern.
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Affiliation(s)
- Haimin Chen
- Ningbo University, Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo, Zhejiang 315211, China.
| | - Feng Wang
- Department of Clinical Laboratory, Lihuili Hospital, Ningbo Medical Center, Ningbo, Zhejiang 315041, China
| | - Haihua Mao
- Ningbo University, Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo, Zhejiang 315211, China
| | - Xiaojun Yan
- Ningbo University, Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo, Zhejiang 315211, China
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JIANG HAIYUE, WANG FENG, CHEN HAIMIN, YAN XIAOJUN. κ-carrageenan induces the disruption of intestinal epithelial Caco-2 monolayers by promoting the interaction between intestinal epithelial cells and immune cells. Mol Med Rep 2013; 8:1635-42. [DOI: 10.3892/mmr.2013.1726] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Accepted: 10/07/2013] [Indexed: 11/05/2022] Open
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Asfaha S, Dubeykovskiy AN, Tomita H, Yang X, Stokes S, Shibata W, Friedman RA, Ariyama H, Dubeykovskaya ZA, Muthupalani S, Ericksen R, Frucht H, Fox JG, Wang TC. Mice that express human interleukin-8 have increased mobilization of immature myeloid cells, which exacerbates inflammation and accelerates colon carcinogenesis. Gastroenterology 2013; 144:155-66. [PMID: 23041326 PMCID: PMC3990262 DOI: 10.1053/j.gastro.2012.09.057] [Citation(s) in RCA: 155] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 09/17/2012] [Accepted: 09/19/2012] [Indexed: 12/17/2022]
Abstract
BACKGROUND & AIMS Interleukin (IL)-8 has an important role in initiating inflammation in humans, attracting immune cells such as neutrophils through their receptors CXCR1 and CXCR2. IL-8 has been proposed to contribute to chronic inflammation and cancer. However, mice do not have the IL-8 gene, so human cancer cell lines and xenograft studies have been used to study the role of IL-8 in colon and gastric carcinogenesis. We generated mice that carry a bacterial artificial chromosome that encompasses the entire human IL-8 gene, including its regulatory elements (IL-8Tg mice). METHODS We studied the effects of IL-8 expression in APCmin(+/-) mice and IL-8Tg mice given azoxymethane and dextran sodium sulfate (DSS). We also examined the effects of IL-8 expression in gastric cancer in INS-GAS mice that overexpress gastrin and IL-8Tg mice infected with Helicobacter felis. RESULTS In IL-8Tg mice, expression of human IL-8 was controlled by its own regulatory elements, with virtually no messenger RNA or protein detectable under basal conditions. IL-8 was strongly up-regulated on systemic or local inflammatory stimulation, increasing mobilization of immature CD11b(+)Gr-1(+) myeloid cells (IMCs) with thioglycolate-induced peritonitis, DSS-induced colitis, and H. felis-induced gastritis. IL-8 was increased in colorectal tumors from patients and IL-8Tg mice compared with nontumor tissues. IL-8Tg mice developed more tumors than wild-type mice following administration of azoxymethane and DSS. Expression of IL-8 increased tumorigenesis in APCmin(+/-) mice compared with APCmin(+/-) mice that lack IL-8; this was associated with increased numbers of IMCs and angiogenesis in the tumors. CONCLUSIONS IL-8 contributes to gastrointestinal carcinogenesis by mobilizing IMCs and might be a therapeutic target for gastrointestinal cancers.
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Affiliation(s)
- Samuel Asfaha
- Division of Digestive and Liver Diseases, Department of Medicine, Irving Cancer Research Center, Columbia University, New York, New York, USA
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23
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Yang L, Zheng PY, Liu ZQ. Activation of TLR4 by CRF in human intestinal epithelial cells is mediated by the CRF2 receptor. Shijie Huaren Xiaohua Zazhi 2012; 20:1763-1767. [DOI: 10.11569/wcjd.v20.i19.1763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effect of corticotrophin-releasing factor (CRF) on the expression of toll-like receptor 4 (TLR4) in human intestinal epithelial cell line HT-29.
METHODS: HT-29 cells were divided into eight groups: non-treated group, LPS group (treated with 20 μg/L LPS for 24 h), CRF group (treated with 20 μg/L CRF for 24 h), LPS plus CRF group (pretreated with 20 μg/L CRF for 12 h and then treated with 20 μg/L LPS for 12 h), astressin 2B plus CRF group (pretreated with 20 μg/L astressin 2B for 12 h and then treated with 20 μg/L CRF), antalarmin plus CRF group (pretreated with 20 μg/L antalarmin for 12 h and then treated with 20 μg/L CRF), astressin 2B plus LPS group (pretreated with 20 μg/L astressin 2B for 12 h and then treated with 20 μg/L LPS), and antalarmin plus LPS group (pretreated with 20 μg/L antalarmin for 12 h and then treated with 20 μg/L LPS). The expression of TLR4 mRNA and protein was detected by reverse transcription-polymerase chain reaction (RT-PCR) and Western blotting, respectively. The secretion of interleukin-8 in the culture supernatants was determined by enzyme-linked immunosorbent assay (ELISA).
RESULTS: CRF could induce the expression of TLR4 in HT-29 cells and result in increased interleukin-8 secretion (P < 0.05). CRFR2 antagonist astressin 2B inhibited the expression of LR4 (P < 0.05, CRF+LPS group vs CRF group), while CRF1 antagonist antalarmin had no significant effect on the expression of TLR4 (P > 0.05, CRF+LPS group vs CRF group).
CONCLUSION: The induction of TLR4 expression by CRF in human intestinal epithelial cells is mediated by the CRF2 receptor.
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Gais P, Reim D, Jusek G, Rossmann-Bloeck T, Weighardt H, Pfeffer K, Altmayr F, Janssen KP, Holzmann B. Cutting edge: Divergent cell-specific functions of MyD88 for inflammatory responses and organ injury in septic peritonitis. THE JOURNAL OF IMMUNOLOGY 2012; 188:5833-7. [PMID: 22586041 DOI: 10.4049/jimmunol.1200038] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Although global MyD88 deficiency attenuates lethal inflammation in sepsis, cell-specific functions of MyD88 remain largely unknown. Using mice with selective expression of MyD88 in myeloid cells (Myd88(MYEL)), we show that, during polymicrobial septic peritonitis, both myeloid and nonmyeloid cells contribute to systemic inflammation, whereas myeloid cell MyD88 was sufficient to fully establish the peritoneal cytokine response. Importantly, Myd88(MYEL) mice developed markedly aggravated liver injury that was linked to impaired upregulation of cellular inhibitor of apoptosis protein 2 and an excessive production of TNF-α. Upregulation of inducible cAMP early repressor (ICER), a known transcriptional repressor of the Tnfa gene, was impaired in Myd88(MYEL) mice. Moreover, Myd88(MYEL) mice showed enhanced transcription of the Tnfa gene and an excessive production of CCL3, which is also negatively regulated by ICER, but they had normal levels of CXCL1, which is expressed in an ICER-independent manner. Together, these findings suggest a novel protective role for nonmyeloid cell MyD88 in attenuating liver injury during septic peritonitis.
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Affiliation(s)
- Petra Gais
- Chirurgische Klinik und Poliklinik, Technische Universität München, 81675 Munich, Germany
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Borthakur A, Bhattacharyya S, Anbazhagan AN, Kumar A, Dudeja PK, Tobacman JK. Prolongation of carrageenan-induced inflammation in human colonic epithelial cells by activation of an NFκB-BCL10 loop. Biochim Biophys Acta Mol Basis Dis 2012; 1822:1300-7. [PMID: 22579587 DOI: 10.1016/j.bbadis.2012.05.001] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 04/25/2012] [Accepted: 05/01/2012] [Indexed: 01/08/2023]
Abstract
Carrageenan, a sulfated polysaccharide that is widely used as a food additive, induces inflammatory responses in animal models and human cells. The carrageenan-induced inflammatory cascades involve toll-like receptor (TLR)4- and B-cell leukemia/lymphoma (BCL)10-dependent activation of NF-κB, leading to increased IL-8 production. Translocations involving BCL10 in the mucosa-associated lymphoid tissue (MALT) lymphomas are associated with constitutive activation of NF-κB. This report presents a mechanism by which carrageenan exposure leads to prolonged activation of both BCL10 and NF-κB in human colonic epithelial cells. Study findings demonstrate that nuclear RelA and RelB bind to an NF-κB binding motif in the BCL10 promoter in human colonic epithelial NCM460 and HT-29 cells. In vitro oligonucleotide binding assay, non-radioactive gel shift assay, and chromatin immunoprecipitation (ChIP) indicate binding of RelA and RelB to the BCL10 promoter. Prolonged inflammation follows activation of the BCL10-NFκB inflammatory loop in response to carrageenan, shown by increased BCL10, RelA, and IL-8 for 36 to 48h and increased RelB for 24h following withdrawal of carrageenan after 12h. In contrast, exposure to dextran sulfate sodium, which does not cause inflammation through TLR4 and BCL10 in the colonic epithelial cells, did not provoke prolonged activation of inflammation. The carrageenan-enhanced BCL10 promoter activity was blocked by caffeic acid phenethyl ester (CAPE) and MB-132 which inhibit NF-κB activation. These results indicate that NF-κB binding to the BCL10 promoter can lead to prolonged activation of the carrageenan-induced inflammatory cascade by a transcriptional mechanism involving an NF-κB-BCL10 loop.
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Affiliation(s)
- Alip Borthakur
- Department of Medicine, University of Illinois at Chicago, IL, USA
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26
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Bhattacharyya S, Borthakur A, Anbazhagan AN, Katyal S, Dudeja PK, Tobacman JK. Specific effects of BCL10 Serine mutations on phosphorylations in canonical and noncanonical pathways of NF-κB activation following carrageenan. Am J Physiol Gastrointest Liver Physiol 2011; 301:G475-86. [PMID: 21700900 PMCID: PMC3174537 DOI: 10.1152/ajpgi.00071.2011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
To determine the impact of B cell leukemia/lymphoma (BCL) 10 on the phosphorylation of crucial mediators in NF-κB-mediated inflammatory pathways, human colonic epithelial cells were exposed to carrageenan (CGN), a sulfated polysaccharide commonly used as a food additive and known to induce NF-κB nuclear translocation by both canonical and noncanonical pathways. Phosphorylations of intermediates in inflammatory cascades, including NF-κB-inducing kinase (NIK) at Thr(559), transforming growth factor-β-activating kinase (TAK) 1 at Thr(184), Thr(187), and Ser(192), and inhibitory factor κBα (IκBα) at Ser(32), were examined following mutation of BCL10 at Ser(138) and at Ser(218). Specific phosphoantibodies were used for detection by enzyme-linked immunosorbent assay, immunoblot, and confocal microscopy of differences in phosphorylation following transfection by mutated BCL10. Both mutations demonstrated dominant-negative effects, with inhibition of phospho(Ser(32))-IκBα to less than control levels. Both of the BCL10 mutations reduced the CGN-induced increases in nuclear RelA and p50, but only the Ser(138) mutation inhibited the CGN-induced increases in nuclear RelB and p52 and in NIK Thr(559) phosphorylation. Hence, the phosphorylation of BCL10 Ser(138), but not Ser(218), emerged as a critical event in activation of the noncanonical pathway of NF-κB activation. Either BCL10 Ser(138) or Ser(218) mutation inhibited the phosphorylation of TAK1 at Thr(184) and at Thr(187), but not at Ser(192). These findings indicate that BCL10 phosphorylations act upstream of phosphorylations of NIK, TAK1, and IκBα and differentially affect the canonical and noncanonical pathways of NF-κB activation.
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Affiliation(s)
| | - Alip Borthakur
- 1Department of Medicine, University of Illinois at Chicago, Chicago; and
| | | | - Shivani Katyal
- 1Department of Medicine, University of Illinois at Chicago, Chicago; and
| | - Pradeep K. Dudeja
- 1Department of Medicine, University of Illinois at Chicago, Chicago; and ,2Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois
| | - Joanne K. Tobacman
- 1Department of Medicine, University of Illinois at Chicago, Chicago; and ,2Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois
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Hilborn J. In vivo
injectable gels for tissue repair. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2011; 3:589-606. [DOI: 10.1002/wnan.91] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jons Hilborn
- Department of Materials Chemistry, Uppsala University, Uppsala 75121, Sweden
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Leister KP, Huang R, Goodwin BL, Chen A, Austin CP, Xia M. Two High Throughput Screen Assays for Measurement of TNF-α in THP-1 Cells. CURRENT CHEMICAL GENOMICS 2011; 5:21-9. [PMID: 21643507 PMCID: PMC3106354 DOI: 10.2174/1875397301105010021] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Revised: 03/23/2011] [Accepted: 03/26/2011] [Indexed: 11/22/2022]
Abstract
Tumor Necrosis Factor-α (TNF-α), a secreted cytokine, plays an important role in inflammatory diseases and immune disorders, and is a potential target for drug development. The traditional assays for detecting TNF-α, enzyme linked immunosorbent assay (ELISA) and radioimmunoassay, are not suitable for the large size compound screens. Both assays suffer from a complicated protocol, multiple plate wash steps and/or excessive radioactive waste. A simple and quick measurement of TNF-α production in a cell based assay is needed for high throughput screening to identify the lead compounds from the compound library. We have developed and optimized two homogeneous TNF-α assays using the HTRF (homogeneous time resolved fluorescence) and AlphaLISA assay formats. We have validated the HTRF based TNF-α assay in a 1536-well plate format by screening a library of 1280 pharmacologically active compounds. The active compounds identified from the screen were confirmed in the AlphaLISA TNF-α assay using a bead-based technology. These compounds were also confirmed in a traditional ELISA assay. From this study, several beta adrenergic agonists have been identified as TNF-α inhibitors. We also identified several novel inhibitors of TNF-α, such as BTO-1, CCG-2046, ellipticine, and PD 169316. The results demonstrated that both homogeneous TNF-α assays are robust and suitable for high throughput screening.
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Affiliation(s)
- Kristin P Leister
- NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892, USA
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29
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Bhattacharyya S, Borthakur A, Dudeja PK, Tobacman JK. Lipopolysaccharide-induced activation of NF-κB non-canonical pathway requires BCL10 serine 138 and NIK phosphorylations. Exp Cell Res 2010; 316:3317-27. [PMID: 20466000 PMCID: PMC2963716 DOI: 10.1016/j.yexcr.2010.05.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Revised: 05/03/2010] [Accepted: 05/03/2010] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND AIMS B-cell lymphoma/leukemia (BCL)-10 and reactive oxygen species mediate two pathways of NF-κB (RelA) activation by lipopolysaccharide (LPS) in human colonic epithelial cells. The pathway for LPS activation of RelB by the non-canonical pathway (RelB) in non-myeloid cells was not yet reported, but important for understanding the range of potential microbial LPS-induced effects in inflammatory bowel disease. METHODS Experiments were performed in human colonic epithelial cells and in mouse embryonic fibroblasts deficient in components of the IkappaB kinase (IKK) signalosome, in order to detect mediators of the non-canonical pathway of NF-κB activation, including nuclear RelB and p52 and phospho- and total NF-κB inducing kinase (NIK). BCL10 was silenced by siRNA and effects of mutations of specific phosphorylation sites of BCL10 (Ser138Gly and Ser218Gly) were determined. RESULTS By the non-canonical pathway, LPS exposure increased nuclear RelB and p52, and phospho-NIK, with no change in total NIK. Phosphorylation of BCL10 serine 138 was required for NIK phosphorylation, since mutation of this residue eliminated the increases in phospho-NIK and nuclear RelB and p52. Mutations of either serine 138 or serine 218 reduced RelA, p50, and phospho-IκBα of the canonical pathway. Effects of LPS stimulation and BCL10 silencing on NIK phosphorylation were demonstrated in confocal images. CONCLUSIONS LPS induces activation of both canonical and non-canonical pathways of NF-κB in human colonic epithelial cells, and the non-canonical pathway requires phosphorylations of BCL10 (serine 138) and NIK. These findings demonstrate the important role of BCL10 in mediating LPS-induced inflammation in human colonic epithelial cells and may open new avenues for therapeutic interventions.
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Affiliation(s)
- Sumit Bhattacharyya
- Department of Medicine, University of Illinois at Chicago and Jesse Brown VA Medical Center, Chicago, IL 60612-7227, USA
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30
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Dunne A, Carpenter S, Brikos C, Gray P, Strelow A, Wesche H, Morrice N, O'Neill LAJ. IRAK1 and IRAK4 promote phosphorylation, ubiquitination, and degradation of MyD88 adaptor-like (Mal). J Biol Chem 2010; 285:18276-82. [PMID: 20400509 DOI: 10.1074/jbc.m109.098137] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Signal transduction by Toll-like receptor 2 (TLR2) and TLR4 requires the adaptors MyD88 and Mal (MyD88 adaptor-like) and serine/threonine kinases, interleukin-1 receptor-associated kinases IRAK1 and IRAK4. We have found that both IRAK1 and IRAK4 can directly phosphorylate Mal. In addition, co-expression of Mal with either IRAK resulted in depletion of Mal from cell lysates. This is likely to be due to Mal phosphorylation by the IRAKs because kinase-inactive forms of either IRAK had no effect. Furthermore, lipopolysaccharide stimulation resulted in ubiquitination and degradation of Mal, which was inhibited using an IRAK1/4 inhibitor or by knocking down expression of IRAK1 and IRAK4. MyD88 is not a substrate for either IRAK and did not undergo degradation. We therefore conclude that Mal is a substrate for IRAK1 and IRAK4 with phosphorylation promoting ubiquitination and degradation of Mal. This process may serve to negatively regulate signaling by TLR2 and TLR4.
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Affiliation(s)
- Aisling Dunne
- School of Biochemistry and Immunology, Trinity College Dublin, Dublin 2, Ireland.
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31
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Borthakur A, Bhattacharyya S, Alrefai WA, Tobacman JK, Ramaswamy K, Dudeja PK. Platelet-activating factor-induced NF-kappaB activation and IL-8 production in intestinal epithelial cells are Bcl10-dependent. Inflamm Bowel Dis 2010; 16:593-603. [PMID: 19714753 PMCID: PMC3740729 DOI: 10.1002/ibd.21092] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Platelet-activating factor (PAF), a potent proinflammatory phospholipid mediator, has been implicated in inducing intestinal inflammation in diseases such as inflammatory bowel disease (IBD) and necrotizing enterocolitis (NEC). However, its mechanisms of inducing inflammatory responses are not fully understood. Therefore, studies were designed to explore the mechanisms of PAF-induced inflammatory cascade in intestinal epithelial cells. METHODS Nuclear factor kappa B (NF-kappaB) activation was measured by luciferase assay and enzyme-linked immunosorbent assay (ELISA), and interleukin 8 (IL-8) production was determined by ELISA. B-cell lymphoma 10 (Bcl10), caspase recruitment domain-containing membrane-associated guanylate kinase protein 3 (CARMA3), and mucosa-associated lymphoid tissue lymphoma translocation protein 1 (MALT1) mRNA and protein levels were assessed by real-time reverse-transcription polymerase chain reaction (RT-PCR) and Western blot, respectively. siRNA silencing of Bcl10 was used to examine its role in PAF-induced NF-kappaB activation and IL-8 production. The promoter region of the Bcl10 gene was cloned with the PCR method and promoter activity measured by luciferase assay. RESULTS The adaptor protein Bcl10 appeared to play an important role in the PAF-induced inflammatory pathway in human intestinal epithelial cells. Bcl10 was required for PAF-induced I kappaB alpha phosphorylation, NF-kappaB activation, and IL-8 production in NCM460, a cell line derived from normal human colon, and Caco-2, a transformed human intestinal cell line. PAF also stimulated Bcl10 interactions with CARMA3 and MALT1, and upregulated Bcl10 expression in these cells via transcriptional regulation. CONCLUSIONS These findings highlight a novel PAF-induced inflammatory pathway in intestinal epithelial cells, requiring Bcl10 as a critical mediator and involving CARMA3/Bcl10/MALT1 interactions. The proinflammatory effects of PAF play prominent roles in the pathogenesis of IBD and this pathway may present important targets for intervention in chronic inflammatory diseases of the intestine.
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Affiliation(s)
- Alip Borthakur
- Author to whom all correspondence including reprint requests should be addressed: Alip Borthakur, Ph.D., Department of Medicine, Section of Digestive Diseases and Nutrition, University of Illinois at Chicago, 840 South Wood Street (MC716), Chicago, IL 60612, , Phone: 312-569-7463, FAX: 312-569-7458
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Bhattacharyya S, Borthakur A, Tyagi S, Gill R, Chen ML, Dudeja PK, Tobacman JK. B-cell CLL/lymphoma 10 (BCL10) is required for NF-kappaB production by both canonical and noncanonical pathways and for NF-kappaB-inducing kinase (NIK) phosphorylation. J Biol Chem 2010; 285:522-30. [PMID: 19897484 PMCID: PMC2804200 DOI: 10.1074/jbc.m109.050815] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Revised: 10/08/2009] [Indexed: 01/24/2023] Open
Abstract
B-cell CLL/lymphoma 10 (BCL10), the caspase recruitment domain (CARD)-containing protein involved in the etiology of the mucosa-associated lymphoid tissue (MALT) lymphomas, has been implicated in inflammatory processes in epithelial cells, as well as in immune cells. Experiments in this report indicate that BCL10 is required for activation of nuclear factor (NF)-kappaB by both canonical and noncanonical pathways, following stimulation by the sulfated polysaccharide carrageenan (CGN). In wild type and IkappaB-kinase (IKK)alpha(-/-) mouse embryonic fibroblasts, increases in phospho-IkappaBalpha, nuclear NF-kappaB p65 (RelA) and p50, and KC, the mouse analog of human interleukin-8, were markedly reduced by silencing BCL10 or by exposure to the free radical scavenger Tempol. In IKKbeta(-/-) cells, BCL10 silencing, but not Tempol, reduced the CGN-induced increases in KC, phospho-NF-kappaB-inducing kinase (NIK), cytoplasmic NF-kappaB p100, and nuclear NF-kappaB p52 and RelB, suggesting a BCL10 requirement for activation of the noncanonical pathway. In NCM460 cells, derived from normal, human colonic epithelium, the CGN-induced increases in NF-kappaB family members, p65, p50, p52, and RelB, were inhibited by BCL10 silencing. Although enzyme-linked immunosorbent assay and confocal images demonstrated no change in total NIK following CGN, increases in phospho-NIK in the wild type, IKKbeta(-/-) and IKKalpha(-/-) cells were inhibited by silencing BCL10. These findings indicate an upstream signaling role for BCL10, in addition to its effects on IKKgamma, the regulatory component of the IKK signalosome, and a requirement for BCL10 in both canonical and noncanonical pathways of NF-kappaB activation. Also, the commonly used food additive carrageenan can be added to the short list of known activators of both pathways.
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Affiliation(s)
| | | | | | | | - Mei Ling Chen
- Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, Illinois 60612 and
| | - Pradeep K. Dudeja
- From the Departments of Medicine and
- the Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois 60612
| | - Joanne K. Tobacman
- From the Departments of Medicine and
- the Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois 60612
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Murakami M, Ohta T, Ito S. Lipopolysaccharides enhance the action of bradykinin in enteric neurons via secretion of interleukin-1beta from enteric glial cells. J Neurosci Res 2009; 87:2095-104. [PMID: 19235895 DOI: 10.1002/jnr.22036] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Functional changes of the enteric nervous system have been observed under inflammatory states of inflammatory bowel disease increasing the endotoxin level. The aim of the present study was to determine the effect of lipopolysaccharides (LPS) on myenteric neuron-glia interaction in vitro. We examined the increase of the intracellular Ca(2+) concentration ([Ca(2+)](i)) and the release of interleukin-1beta (IL-1beta) or prostaglandin E(2) (PGE(2)) and COX-2 expression in myenteric plexus cells from the rat intestine induced by LPS. LPS potentiated BK-induced [Ca(2+)](i) increases in both myenteric neurons and enteric glial cells, which were suppressed by a B1R antagonist. Only in enteric glial cells, a B1R agonist increased [Ca(2+)](i). The effects of LPS were blocked by pretreatment with an interleukin-1 receptor antagonist or by reducing the density of enteric glial cells in culture. LPS prompted the release of IL-1beta from enteric glial cells. The augmenting effects of IL-1beta on the BK-induced neural [Ca(2+)](i) increase and PGE(2) release from enteric glial cells were abolished by a phospholipase A(2) (PLA(2)) inhibitor and a COX inhibitor, and partly suppressed by a COX-2 inhibitor. IL-1beta up-regulated the COX-2 expression in enteric glial cells. LPS promotes IL-1beta secretion from enteric glial cells, resulting in augmentation of the neural response to BK through PGE(2) release via glial PLA(2) and COX-2. The alteration of the regulatory effect of glial cells may be the cause of the changes in neural function in the enteric nervous system in inflammatory bowel disease.
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Affiliation(s)
- Matsuka Murakami
- Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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Bhattacharyya S, Dudeja PK, Tobacman JK. ROS, Hsp27, and IKKbeta mediate dextran sodium sulfate (DSS) activation of IkappaBa, NFkappaB, and IL-8. Inflamm Bowel Dis 2009; 15:673-83. [PMID: 19085995 PMCID: PMC2688460 DOI: 10.1002/ibd.20821] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Dextran sodium sulfate (DSS) is a sulfated polysaccharide that has been very widely used to induce inflammation in experimental models of inflammatory bowel disease in which the effects of pharmacologic and biologic therapies are tested. However, the precise mechanisms by which DSS induces inflammation have not been elucidated. METHODS DSS-induced increases in phospho-IkappaBalpha, nuclear NFkappaB (p65), and IL-8 secretion in human colonic epithelial cells in tissue culture are attributable to a reactive oxygen species (ROS)-induced pathway of inflammation, and do not require TLR4, MyD88, or Bcl10, which are associated with the innate immune pathway of NFkappaB-IL-8 activation. RESULTS DSS-induced increases were inhibited by the ROS scavengers Tempol and Tiron, were associated with decreased phosphorylation of MAPK12 (p38gamma), MAPK 13 (p38delta), and Hsp27, and required the IkappaB kinase (IKK) signalosome component IKKbeta. In ex vivo colonic tissue from TLR4-deficient mice, or following knockdown of MyD88 or Bcl10 or exposure to an IRAK 1/4 inhibitor, DSS effects were not suppressed. Data demonstrated that DSS activates IkappaBalpha, NFkappaB, and IL-8 through an ROS-Hsp27-IKKbeta-mediated pathway, and not through an innate immune cascade. CONCLUSIONS These results suggest that DSS models of inflammation may not be optimal for evaluation of interventions that involve mechanisms of innate immunity.
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Affiliation(s)
| | - Pradeep K. Dudeja
- Department of Medicine, University of Illinois at Chicago, Jesse Brown VAMC, Chicago, Illinois
| | - Joanne K. Tobacman
- Department of Medicine, University of Illinois at Chicago, Jesse Brown VAMC, Chicago, Illinois
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Bhattacharyya S, Solakyildirim K, Zhang Z, Chen ML, Linhardt RJ, Tobacman JK. Cell-bound IL-8 increases in bronchial epithelial cells after arylsulfatase B silencing due to sequestration with chondroitin-4-sulfate. Am J Respir Cell Mol Biol 2009; 42:51-61. [PMID: 19346317 DOI: 10.1165/rcmb.2008-0482oc] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The chemokine IL-8 is critically important in inflammatory processes in human tissues, and IL-8 interactions with sulfated glycosaminoglycans have been implicated in modification of inflammatory responses in bronchial epithelium. To determine the role of chondroitin-4-sulfate (C4S) in mediating effects of IL-8, we silenced the enzyme N-acetylgalactosamine-4-sulfatase (arylsulfatase B [ASB]) that removes the 4-sulfate group from C4S, in the IB3-1 and C38 bronchial epithelial cell lines and in normal primary bronchial epithelial cells. When ASB was silenced and IL-8 production stimulated by exposure to TNF-alpha, ASB activity declined by roughly 75%, cellular C4S content increased by over 7.5 microg/mg protein, cell-bound IL-8 increased by over 530 pg/mg protein, and secreted IL-8 declined by over 520 pg/mg protein in all cell lines (P < 0.001). When cell lysates were immunoprecipitated with C4S antibody after ASB silencing and TNF-alpha, the IL-8 content of the immunoprecipitate was approximately 500 pg/mg protein, indicating that most of the cell-bound IL-8 was associated with C4S. Cell fractionation demonstrated that the IL-8 content associated with the cell membranes was about twice that of the cytosolic fraction. Also, ASB appeared to localize in the cell membrane, as well as in lysosomes. Neutrophil attraction to the cell lysates increased after ASB silencing, consistent with increased attraction to the cell-bound IL-8. These findings provide evidence for the influential role of ASB and C4S in the regulation of IL-8 secretion, and suggest that changes in ASB activity and C4S content may have a significant impact on IL-8-mediated inflammatory responses.
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Affiliation(s)
- Sumit Bhattacharyya
- Department of Medicine, University of Illinois at Chicago, 840 S. Wood Street, Chicago, IL 60612, USA
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Bhattacharyya S, Dudeja PK, Tobacman JK. Lipopolysaccharide activates NF-kappaB by TLR4-Bcl10-dependent and independent pathways in colonic epithelial cells. Am J Physiol Gastrointest Liver Physiol 2008; 295:G784-90. [PMID: 18718996 DOI: 10.1152/ajpgi.90434.2008] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In colonic epithelium, one of the pathways of lipopolysaccharide (LPS) activation of NF-kappaB and IL-8 is via Toll-like receptor (TLR)4, MyD88, IRAK1/4, and B-cell CLL/lymphoma 10 (Bcl10). However, this innate immune pathway accounts for only approximately 50% of the NF-kappaB activation, so additional mechanisms to explain the LPS-induced effects are required. In this report, we identify a second pathway of LPS-induced stimulation, mediated by reactive oxygen species (ROS), in human colonic epithelial tissue cells in tissue culture and in ex vivo mouse colonic tissue. Measurements of IL-8, KC, Bcl10, phospho-IkappaBalpha, nuclear NF-kappaB, and phosphorylated Hsp27 were performed by ELISA. The TLR4-Bcl10 pathway was inhibited by Bcl10 siRNA and in studies with colonic tissue from the TLR4-deficient mouse. The ROS pathway was inhibited by Tempol, a free radical scavenger, or by okadaic acid, an inhibitor of Hsp27 dephosphorylation by protein phosphatase 2A (PP2A). The ROS pathway was unaffected in the TLR4-deficient tissue or by silencing of Bcl10. The combination of exposure to the free radical scavenger Tempol and of TLR4 or Bcl10 suppression was required to completely inhibit the LPS-induced activation. The ROS pathway was associated with dephosphorylation of Hsp27. LPS appears to activate both the regulatory component of the IkappaBalpha-kinase (IKK) signalosome through Bcl10 interaction with Nemo (IKKgamma) and the catalytic component through Hsp27 interaction with IKKbeta. Since LPS exposure is associated with septic shock and the systemic inflammatory response syndrome, distinguishing between these two pathways of LPS activation may facilitate new approaches to prevention and treatment.
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Affiliation(s)
- Sumit Bhattacharyya
- Dept. of Medicine, Univ. of Illinois at Chicago, CSN 440, M/C 718, Chicago, IL 60612, USA
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Bhattacharyya S, Gill R, Chen ML, Zhang F, Linhardt RJ, Dudeja PK, Tobacman JK. Toll-like receptor 4 mediates induction of the Bcl10-NFkappaB-interleukin-8 inflammatory pathway by carrageenan in human intestinal epithelial cells. J Biol Chem 2008; 283:10550-8. [PMID: 18252714 PMCID: PMC2447641 DOI: 10.1074/jbc.m708833200] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2007] [Revised: 01/28/2008] [Indexed: 12/28/2022] Open
Abstract
The sulfated polysaccharide carrageenan (CGN) induces activation of NFkappaB and interleukin 8 (IL-8) in human colonic epithelial cells through a pathway of innate immunity mediated by Bcl10 (B-cell CLL/lymphoma 10). In this report, we identify Toll-like receptor 4 (TLR4), a member of the family of innate immune receptors, as the surface membrane receptor for CGN in human colonic epithelial cells. Experiments with fluorescence-tagged CGN demonstrated a marked reduction in binding of CGN to human intestinal epithelial cells and to RAW 264.7 mouse macrophages, following exposure to TLR4 blocking antibody (HTA-125). Binding of CGN to 10ScNCr/23 mouse macrophages, which are deficient in the genetic locus for TLR4, was absent. Additional experiments with TLR4 blocking antibody and TLR4 small interfering RNAs showed 80% reductions in CGN-induced increases in Bcl10 and IL-8. Transfection with dominant-negative MyD88 plasmid demonstrated MyD88 dependence of the CGN-TLR4-triggered increases in Bcl10 and IL-8. Therefore, these results indicate that CGN-induced inflammation in human colonocytes proceeds through a pathway of innate immunity, perhaps related to the unusual alpha-1,3-galactosidic linkage characteristic of CGN, and suggest how dietary CGN intake may contribute to human intestinal inflammation. Because CGN is a commonly used food additive in the Western diet, clarification of its effects and mechanisms of action are vital to issues of food safety.
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Affiliation(s)
- Sumit Bhattacharyya
- Department of Medicine, University of Illinois, Chicago, Illinois 60612, USA
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Carrageenan-induced NFkappaB activation depends on distinct pathways mediated by reactive oxygen species and Hsp27 or by Bcl10. Biochim Biophys Acta Gen Subj 2008; 1780:973-82. [PMID: 18452717 DOI: 10.1016/j.bbagen.2008.03.019] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2008] [Revised: 03/16/2008] [Accepted: 03/26/2008] [Indexed: 12/22/2022]
Abstract
Carrageenans are highly sulfated polysaccharides that are widely used as food additives due to their ability to improve food texture. They are also widely recognized for their ability to induce inflammation in animal models of colitis. Recently, we reported that carrageenan (CGN) activated a pathway of innate immunity in human colonic epithelial cells mediated by Bcl10 (B-cell CLL/lymphoma 10). However, increases in phospho-IkappaBalpha and Interleukin-8 (IL-8) were not completely inhibited by silencing Bcl10, suggesting that CGN also influenced another mechanism, or mechanisms, of inflammation. In this report, we demonstrate that CGN increases production of reactive oxygen species (ROS) in human colonic epithelial cells. The combination of ROS quenching by the free radical scavenger Tempol and of Bcl10 silencing by siRNA completely inhibited the CGN-induced increases in nuclear NFkappaB (p65), phospho-IkappaBalpha, and secretion of IL-8. The CGN-induced increase in ROS was associated with declines in phosphorylation of MAPK 12 (p38gamma), MAPK 13 (p38delta), and heat-shock protein (Hsp) 27. The CGN-induced decline in phospho-Hsp27 was reversed by co-administration of Tempol (100 nM), but unaffected by silencing Bcl10. Since Hsp27 phosphorylation is inversely associated with phosphorylation of the IkappaBalpha kinase (IKK) signalosome, CGN exposure appears to affect the IKK signalosome by both the catalytic component, mediated by ROS-phospho-Hsp27, and the regulatory component, mediated by Bcl10 interaction with IKKgamma (Nemo). Hence, the CGN-activated inflammatory cascades related to innate immunity and to generation of ROS may be integrated at the level of the IKK signalosome.
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Bhattacharyya S, Borthakur A, Dudeja PK, Tobacman JK. Carrageenan induces cell cycle arrest in human intestinal epithelial cells in vitro. J Nutr 2008; 138:469-75. [PMID: 18287351 PMCID: PMC4887287 DOI: 10.1093/jn/138.3.469] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Multiple studies in animal models have shown that the commonly used food additive carrageenan (CGN) induces inflammation and intestinal neoplasia. We performed the first studies to determine the effects of CGN exposure on human intestinal epithelial cells (IEC) in tissue culture and tested the effect of very low concentrations (1-10 mg/L) of undegraded, high-molecular weight CGN. These concentrations of CGN are less than the anticipated exposure of the human colon to CGN from the average Western diet. In the human colonic epithelial cell line NCM460 and in primary human colonic epithelial cells that were exposed to CGN for 1-8 d, we found increased cell death, reduced cell proliferation, and cell cycle arrest compared with unexposed control cells. After 6-8 d of CGN exposure, the percentage of cells reentering G0-G1 significantly decreased and the percentages of cells in S and G2-M phases significantly increased. Increases in activated p53, p21, and p15 followed CGN exposure, consistent with CGN-induced cell cycle arrest. Additional data, including DNA ladder, poly ADP ribose polymerase Western blot, nuclear DNA staining, and activities of caspases 3 and 7, indicated no evidence of increased apoptosis following CGN exposure and were consistent with CGN-induced necrotic cell death. These data document for the first time, to our knowledge, marked adverse effects of low concentrations of CGN on survival of normal human IEC and suggest that CGN exposure may have a role in development of human intestinal pathology.
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