1
|
Ganieva U, Schneiderman S, Bu P, Beaman K, Dambaeva S. IL-22 regulates endometrial regeneration by enhancing tight junctions and orchestrating extracellular matrix. Front Immunol 2022; 13:955576. [PMID: 36091010 PMCID: PMC9453595 DOI: 10.3389/fimmu.2022.955576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 08/08/2022] [Indexed: 11/18/2022] Open
Abstract
The uterine endometrium uniquely regenerates after menses, postpartum, or after breaks in the uterine layer integrity throughout women’s lives. Direct cell–cell contacts ensured by tight and adherens junctions play an important role in endometrial integrity. Any changes in these junctions can alter the endometrial permeability of the uterus and have an impact on the regeneration of uterine layers. Interleukin 22 (IL-22) is a cytokine that is recognized for its role in epithelial regeneration. Moreover, it is crucial in controlling the inflammatory response in mucosal tissues. Here, we studied the role of IL-22 in endometrial recovery after inflammation-triggered abortion. Fecundity of mice was studied in consecutive matings of the same animals after lipopolysaccharide (LPS) (10 µg per mouse)-triggered abortion. The fecundity rate after the second mating was substantially different between IL-22 knockout (IL-22−/−) (9.1%) and wild-type (WT) (71.4%) mice (p < 0.05), while there was no difference between the groups in the initial mating, suggesting that IL-22 deficiency might be associated with secondary infertility. A considerable difference was observed between IL-22−/− and WT mice in the uterine clearance following LPS-triggered abortion. Gross examination of the uteri of IL-22−/− mice revealed non-viable fetuses retained inside the horns (delayed clearance). In contrast, all WT mice had completed abortion with total clearance after LPS exposure. We also discovered that IL-22 deficiency is associated with a decreased expression of tight junctions (claudin-2 and claudin-10) and cell surface pathogen protectors (mucin-1). Moreover, IL-22 has a role in the remodeling of the uterine tissue in the inflammatory environment by regulating epithelial–mesenchymal transition markers called E- and N-cadherin. Therefore, IL-22 contributes to the proper regeneration of endometrial layers after inflammation-triggered abortion. Thus, it might have a practical significance to be utilized as a treatment option postpartum (enhanced regeneration function) and in secondary infertility caused by inflammation (enhanced barrier/protector function).
Collapse
Affiliation(s)
- Umida Ganieva
- Center for Cancer Cell Biology, Immunology, and Infection, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
| | - Sylvia Schneiderman
- Clinical Immunology Laboratory, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
| | - Pengli Bu
- Department of Pharmaceutical Sciences, College of Pharmacy, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
| | - Kenneth Beaman
- Center for Cancer Cell Biology, Immunology, and Infection, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
- Clinical Immunology Laboratory, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
| | - Svetlana Dambaeva
- Center for Cancer Cell Biology, Immunology, and Infection, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
- Clinical Immunology Laboratory, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
- *Correspondence: Svetlana Dambaeva,
| |
Collapse
|
2
|
Chiang HY, Lu HH, Sudhakar JN, Chen YW, Shih NS, Weng YT, Shui JW. IL-22 initiates an IL-18-dependent epithelial response circuit to enforce intestinal host defence. Nat Commun 2022; 13:874. [PMID: 35169117 PMCID: PMC8847568 DOI: 10.1038/s41467-022-28478-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 01/26/2022] [Indexed: 12/19/2022] Open
Abstract
IL-18 is emerging as an IL-22-induced and epithelium-derived cytokine which contributes to host defence against intestinal infection and inflammation. In contrast to its known role in Goblet cells, regulation of barrier function at the molecular level by IL-18 is much less explored. Here we show that IL-18 is a bona fide IL-22-regulated gate keeper for intestinal epithelial barrier. IL-22 promotes crypt immunity both via induction of phospho-Stat3 binding to the Il-18 gene promoter and via Il-18 independent mechanisms. In organoid culture, while IL-22 primarily increases organoid size and inhibits expression of stem cell genes, IL-18 preferentially promotes organoid budding and induces signature genes of Lgr5+ stem cells via Akt-Tcf4 signalling. During adherent-invasive E. coli (AIEC) infection, systemic administration of IL-18 corrects compromised T-cell IFNγ production and restores Lysozyme+ Paneth cells in Il-22-/- mice, but IL-22 administration fails to restore these parameters in Il-18-/- mice, thereby placing IL-22-Stat3 signalling upstream of the IL-18-mediated barrier defence function. IL-18 in return regulates Stat3-mediated anti-microbial response in Paneth cells, Akt-Tcf4-triggered expansion of Lgr5+ stem cells to facilitate tissue repair, and AIEC clearance by promoting IFNγ+ T cells.
Collapse
Affiliation(s)
- Hung-Yu Chiang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Hsueh-Han Lu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | | | - Yu-Wen Chen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- Taiwan International Graduate Program in Molecular Medicine, National Yang Ming Chiao Tung University and Academia Sinica, Taipei, Taiwan
| | - Nien-Shin Shih
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yi-Ting Weng
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Jr-Wen Shui
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
| |
Collapse
|
3
|
Jeong YJ, Kim DH, Lee KW. Homeostasis effects of fermented Maillard reaction products by Lactobacillus gasseri 4M13 in dextran sulfate sodium-induced colitis mice. J Sci Food Agric 2022; 102:434-444. [PMID: 34143895 DOI: 10.1002/jsfa.11374] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 05/08/2021] [Accepted: 06/18/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The incidence of inflammatory bowel disease (IBD) continues to increase worldwide. Multiple factors, including diet, loss of the intestinal barrier function, and imbalance of the immune system can cause IBD. A balanced diet is important for maintaining a healthy bowel and preventing IBD from occurring. The effects of probiotic Lactobacillus gasseri-fermented Maillard reaction products (MRPs) prepared by reacting whey protein with galactose on anti-inflammation and intestinal homeostasis were investigated in this study, which compared MPRs and probiotics separately. RESULTS In an animal colitis model induced by 2% dextran sulfate sodium (DSS), FWG administration alleviated colon length loss and maintained intestinal immune system homeostasis as reflected by down-regulated interleukin (IL)-6, IL-10, tumor necrosis factor (TNF)-α output, and metallopeptidase-9, and epithelial barrier balance as reflected by up-regulated occludin, E-cadherin, and zonula occludens-1 production in the colon. Furthermore, the expression of splenic cytokines such as IL-6, TNF-α, and IL-10 was up-regulated in the FWG-treated mice in a comparable amount to the control group to ensure the balance of immune responses. CONCLUSION This study showed that the use of FWG protects the intestines from colitis caused by DSS and maintains immune balance. FWG increased antioxidant enzyme activity, increased intestinal permeability, and regulated the balance of pro- and anti-inflammatory cytokines in the intestines and spleen. Continued intake of FWG can alleviate IBD symptoms through the preservation of mucosal immune responses, epithelial junction and homeostasis through the regulated splenic cytokines. © 2021 Society of Chemical Industry.
Collapse
Affiliation(s)
- Yu-Jin Jeong
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Da Hyun Kim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Kwang-Won Lee
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| |
Collapse
|
4
|
Wang K, Qiu L, Zhu J, Sun Q, Qu W, Yu Y, Zhao Z, Yu Y, Shao G. Environmental contaminant BPA causes intestinal damage by disrupting cellular repair and injury homeostasis in vivo and in vitro. Biomed Pharmacother 2021; 137:111270. [PMID: 33485121 DOI: 10.1016/j.biopha.2021.111270] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 01/05/2021] [Accepted: 01/10/2021] [Indexed: 02/07/2023] Open
Abstract
Our previous studies have shown that the environmental contaminant bisphenol A (BPA) exhibits strong intestinal toxicity and can readily cause intestinal barrier dysfunction. However, the causal relationship between adverse biological processes of BPA-induced intestinal tissue and the role of key signaling molecules in it requires further investigation. In this study, we established a mouse and intestinal epithelial cell model of BPA treatment to determine the underlying molecular mechanisms of BPA-induced intestinal injury. The results showed that the BPA treatment increased the intestinal permeability and disrupted the barrier function by increasing the chemical marker content and tight junction expression in intestinal tissues and blood circulation. BPA also altered the oxidative and antioxidant status of intestinal epithelial cells by increasing ROS and RNS contents and decreasing the activity levels of SOD, GPx, CAT, and T-AOC. BPA further induced inflammatory responses by upregulating the gene abundance of key factors of the innate immune system (TLR2, TLR4, MyD88, and NF-κB), the transcriptional activity of NF-kB, and the secretion of pro-inflammatory cytokines (IL-1β, IL-6, IL-8, and TNF-α). Moreover, apoptosis was activated by BPA, whereas cell proliferation was inhibited by BPA. Mechanistically, co-treatment of intestinal epithelial cells with BPA using the oxidative stress scavenger NAC, the NF-κB-specific inhibitor JSH-23, and the apoptosis inhibitor Z-VAD-FMK, respectively, showed that BPA activates the innate immune response by inducing oxidative stress. Consequently, apoptosis is promoted, and cell proliferation is inhibited, ultimately disrupting the intestinal barrier function. Our findings provide insight into the pathogenesis of BPA-induced gut injury.
Collapse
Affiliation(s)
- Kai Wang
- Department of Gastrointestinal Surgery, The Affiliated Hospital of Xuzhou Medical University, Jiangsu Province, China
| | - Lei Qiu
- Department of Gastrointestinal Surgery, The Second People's Hospital of Lianyungang, Lianyungang, Jiangsu, China
| | - Junjia Zhu
- Department of General Surgery, Jiangyin Hospital Affiliated to Nantong University, Jiangyin, Jiangsu, 214400, China
| | - Qi Sun
- Department of General Surgery, Jiangyin Hospital Affiliated to Nantong University, Jiangyin, Jiangsu, 214400, China
| | - Wei Qu
- Department of General Surgery, Jiangyin Hospital Affiliated to Nantong University, Jiangyin, Jiangsu, 214400, China
| | - Yifeng Yu
- Department of General Surgery, Jiangyin Hospital Affiliated to Nantong University, Jiangyin, Jiangsu, 214400, China
| | - Zhenguo Zhao
- Department of General Surgery, Jiangyin Hospital Affiliated to Nantong University, Jiangyin, Jiangsu, 214400, China; Jiangsu Key Laboratory of Immunity and Metabolism, Xuzhou Medical University, Xuzhou, Jiangsu, China.
| | - Yifeng Yu
- Department of General Surgery, Jiangyin Hospital Affiliated to Nantong University, Jiangyin, Jiangsu, 214400, China
| | - Guoyi Shao
- Department of General Surgery, Jiangyin Hospital Affiliated to Nantong University, Jiangyin, Jiangsu, 214400, China.
| |
Collapse
|
5
|
Deluco B, Fourie KR, Simko OM, Wilson HL. Localization of Claudin-3 and Claudin-4 within the Small Intestine of newborn piglets. Physiol Rep 2021; 9:e14717. [PMID: 33523589 PMCID: PMC7849452 DOI: 10.14814/phy2.14717] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/17/2020] [Accepted: 12/22/2020] [Indexed: 12/26/2022] Open
Abstract
Piglets must acquire passive immunity through colostrum within hours after birth to survive. How colostral macromolecules traverse the small intestinal epithelium may include nonselective pinocytosis and paracellular transport through tight junction proteins located between epithelial cells. Claudin proteins-3 and -4 contribute to the epithelial tight junctions (TJs) on the apical aspect of lateral surfaces of intestinal epithelial cells (IECs) where they help regulate ion and macromolecule movement across the intestinal epithelium. Throughout the small intestine of newborn piglets, Claudin-3 was localized to the lateral and basolateral surface of intestinal epithelial cells as well as the membrane of large vacuoles. In the duodenum and jejunum, Claudin-4 was localized to the apical surface independent of tight junction regions. In the ileum, Claudin-4 was localized to the lateral and basolateral surfaces indicating region-specific differences and noncanonical patterns of Claudin-4 localization independent of tight junction regions. Understanding the timing of changes in surface localization of Claudin-3 and Claudin-4 and how they may coincide with changes in small intestinal permeability may help develop new protective strategies against infectious diseases within newborn piglets.
Collapse
Affiliation(s)
- Brodie Deluco
- Vaccine and Infectious Disease Organization‐International Vaccine Centre (VIDO‐InterVac)University of SaskatchewanSaskatoonSKCanada
| | - Kezia R Fourie
- Vaccine and Infectious Disease Organization‐International Vaccine Centre (VIDO‐InterVac)University of SaskatchewanSaskatoonSKCanada
| | - Olena M Simko
- Vaccine and Infectious Disease Organization‐International Vaccine Centre (VIDO‐InterVac)University of SaskatchewanSaskatoonSKCanada
| | - Heather L Wilson
- Vaccine and Infectious Disease Organization‐International Vaccine Centre (VIDO‐InterVac)University of SaskatchewanSaskatoonSKCanada
| |
Collapse
|
6
|
Taïlé J, Patché J, Veeren B, Gonthier MP. Hyperglycemic Condition Causes Pro-Inflammatory and Permeability Alterations Associated with Monocyte Recruitment and Deregulated NFκB/PPARγ Pathways on Cerebral Endothelial Cells: Evidence for Polyphenols Uptake and Protective Effect. Int J Mol Sci 2021; 22:ijms22031385. [PMID: 33573189 PMCID: PMC7866545 DOI: 10.3390/ijms22031385] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 01/26/2021] [Accepted: 01/27/2021] [Indexed: 12/12/2022] Open
Abstract
Hyperglycemia alters the function of cerebral endothelial cells from the blood-brain barrier, increasing the risk of cerebrovascular complications during diabetes. This study evaluated the protective effect of polyphenols on inflammatory and permeability markers on bEnd3 cerebral endothelial cells exposed to high glucose concentration. Results show that hyperglycemic condition increased nuclear factor kappa B (NFκB) activity, deregulated the expression of interleukin-1 beta (IL-1β), interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-α), cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS), interleukin-10 (IL-10) and endothelial-leukocyte adhesion molecule (E-selectin) genes, raised MCP-1 secretion and elevated monocyte adhesion and transendothelial migration. High glucose decreased occludin, claudin-5, zona occludens-1 (ZO-1) and zona occludens-2 (ZO-2) tight junctions production and altered the endothelial permeability. Characterized polyphenolic extracts from the French medicinal plants Antirhea borbonica, Ayapana triplinervis, Dodonaea viscosa and Terminalia bentzoe, and their major polyphenols quercetin, caffeic, chlorogenic and gallic acids limited the pro-inflammatory and permeability alterations caused by high glucose. Peroxisome proliferator-activated receptor gamma (PPARγ) agonist also attenuated these damages while PPARγ antagonist aggravated them, suggesting PPARγ protective action. Interestingly, polyphenols improved PPARγ gene expression lowered by high glucose. Moreover, polyphenols were detected at the intracellular level or membrane-bound to cells, with evidence for breast cancer resistance protein (BCRP) efflux transporter role. Altogether, these findings emphasize the ability of polyphenols to protect cerebral endothelial cells in hyperglycemic condition and their relevance for pharmacological strategies aiming to limit cerebrovascular disorders in diabetes.
Collapse
|
7
|
Wang L, Wu D, Fan Z, Li H, Li J, Zhang Y, Xu Q, Wang G, Zhu Z. Effect of Yucca schidigera extract on the growth performance, intestinal antioxidant status, immune response, and tight junctions of mirror carp (Cyprinus carpio). Fish Shellfish Immunol 2020; 103:211-219. [PMID: 32422190 DOI: 10.1016/j.fsi.2020.05.039] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 05/08/2020] [Accepted: 05/14/2020] [Indexed: 05/26/2023]
Abstract
The current study was designed to evaluate the effect of Yucca schidigera extract (YSE) on the growth performance, intestinal antioxidant status, immune response, and tight junctions of mirror carp (Cyprinus carpio). A total of 450 mirror carp (45.21 ± 0.43 g) were fed diets supplemented with 0, 200, or 400 mg/kg YSE for 8 weeks. Compared with the control (0 mg/kg), the final body weight and weight gain rate were significantly higher in the 400 mg/kg YSE group (P < 0.05), and the serum ammonia concentration was significantly lower in both YSE groups (P < 0.05). Additionally, the total antioxidant capacity was significantly higher in the 400 mg/kg YSE group (P < 0.05), and the malondialdehyde content was significantly lower in both YSE groups (P < 0.05). Complement 3 and 4 contents were significantly higher in the 400 mg/kg YSE group (P < 0.05), and lysozyme was significantly higher in both YSE groups compared to the control group (P < 0.05). The relative mRNA levels of copper zinc superoxide dismutase, catalase, glutathione peroxidase1a, and nuclear factor erythroid 2-related factor 2 as well as transforming growth factor β were significantly higher in both YSE supplemented groups compared to the control (P < 0.05), whereas the relative mRNA level of Kelch-like ECH-associated protein 1 was significantly lower in both YSE supplemented groups (P < 0.05). The relative mRNA levels of interleukin 1β and interleukin 6 were significantly lower in the 400 mg/kg YSE supplemented group compared to the control (P < 0.05). Additionally, both YSE levels decreased the relative mRNA expression of tumour necrosis factor-α (P < 0.05). The relative mRNA levels of ZO-1 and claudin 11 were significantly higher in both YSE supplemented groups (P < 0.05), and the relative mRNA level of occludin was significantly higher in the 200 mg/kg YSE group than the control and 400 mg/kg YSE groups (P < 0.05). In conclusion, dietary supplementation with 400 mg/kg YSE improved the growth, intestinal antioxidant status, immune response, and tight junctions of mirror carp.
Collapse
Affiliation(s)
- Liansheng Wang
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, PR China.
| | - Di Wu
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, PR China
| | - Ze Fan
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, PR China
| | - Hongqin Li
- Animal Feed Science Research Institute, New Hope Liuhe Co., Ltd, Chengdu, 610101, PR China
| | - Jinnan Li
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, PR China
| | - Yuanyuan Zhang
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, PR China
| | - Qiyou Xu
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, PR China; School of Life Science, Huzhou University, Huzhou, 313000, PR China
| | - Guanghua Wang
- Animal Feed Science Research Institute, New Hope Liuhe Co., Ltd, Chengdu, 610101, PR China
| | - Zhengpeng Zhu
- Sichuan Tequ Agriculture and Animal Husbandry Technology Group Co., Ltd, Chengdu, 610207, PR China.
| |
Collapse
|
8
|
Ahn D, Prince A. Participation of the IL-10RB Related Cytokines, IL-22 and IFN-λ in Defense of the Airway Mucosal Barrier. Front Cell Infect Microbiol 2020; 10:300. [PMID: 32637365 PMCID: PMC7318800 DOI: 10.3389/fcimb.2020.00300] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 05/19/2020] [Indexed: 12/12/2022] Open
Abstract
The airway epithelial barrier is a major barrier protecting against clinically significant infections of the lung. Its integrity is often compromised due to mechanical, chemical, or infectious causes. Opportunistic bacterial pathogens are poised to cause parenchymal infection and become difficult to eradicate due to adaptive metabolic changes, biofilm formation, and the acquisition of antimicrobial resistance and fitness genes. Enhancing mucosal defenses by modulating the cytokines that regulate barrier functions, such as interleukin-22 (IL-22) and interferon-λ (IFN-λ), members of the IL-10 family of cytokines, is an attractive approach to prevent these infections that are associated with high morbidity and mortality. These cytokines both signal through the cognate receptor IL-10RB, have related protein structures and common downstream signaling suggesting shared roles in host respiratory defense. They are typically co-expressed in multiple models of infections, but with differing kinetics. IL-22 has an important role in the producing antimicrobial peptides, upregulating expression of junctional proteins in the airway epithelium and working in concert with other inflammatory cytokines such as IL-17. Conversely, IFN-λ, a potent antiviral in influenza infection with pro-inflammatory properties, appears to decrease junctional integrity allowing for bacterial and immune cell translocation. The effects of these cytokines are pleotropic, with pathogen and tissue specific consequences. Understanding how these cytokines work in the mucosal defenses of the respiratory system may suggest potential targets to prevent invasive infections of the damaged lung.
Collapse
Affiliation(s)
| | - Alice Prince
- Department of Pediatrics, Columbia University Medical Center, New York, NY, United States
| |
Collapse
|
9
|
Rashid MU, Zahedi-Amiri A, Glover KKM, Gao A, Nickol ME, Kindrachuk J, Wilkins JA, Coombs KM. Zika virus dysregulates human Sertoli cell proteins involved in spermatogenesis with little effect on tight junctions. PLoS Negl Trop Dis 2020; 14:e0008335. [PMID: 32511241 PMCID: PMC7279580 DOI: 10.1371/journal.pntd.0008335] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 04/29/2020] [Indexed: 12/11/2022] Open
Abstract
Zika virus (ZIKV), a neglected tropical disease until its re-emergence in 2007, causes microcephaly in infants and Guillain-Barré syndrome in adults. Its re-emergence and spread to more than 80 countries led the World Health Organization in 2016 to declare a Public Health Emergency. ZIKV is mainly transmitted by mosquitos, but can persist in infected human male semen for prolonged periods and may be sexually transmitted. Testicular Sertoli cells support ZIKV replication and may be a reservoir for persistent ZIKV infection. Electrical impedance analyses indicated ZIKV infection rapidly disrupted Vero cell monolayers but had little effect upon human Sertoli cells (HSerC). We determined ZIKV-induced proteomic changes in HSerC using an aptamer-based multiplexed technique (SOMAscan) targeting >1300 human proteins. ZIKV infection caused differential expression of 299 proteins during three different time points, including 5 days after infection. Dysregulated proteins are involved in different bio-functions, including cell death and survival, cell cycle, maintenance of cellular function, cell signaling, cellular assembly, morphology, movement, molecular transport, and immune response. Many signaling pathways important for maintenance of HSerC function and spermatogenesis were highly dysregulated. These included IL-6, IGF1, EGF, NF-κB, PPAR, ERK/MAPK, and growth hormone signaling. Down-regulation of the PPAR signaling pathway might impact cellular energy supplies. Upstream molecule analysis also indicated microRNAs involved in germ cell development were downregulated by infection. Overall, this study leads to a better understanding of Sertoli cellular mechanisms used by ZIKV during persistent infection and possible ZIKV impacts on spermatogenesis.
Collapse
Affiliation(s)
- Mahamud-ur Rashid
- University of Manitoba, Department of Medical Microbiology and Infectious Diseases, Winnipeg, Manitoba, Canada
- Manitoba Centre for Proteomics & Systems Biology, Winnipeg, Manitoba, Canada
| | - Ali Zahedi-Amiri
- University of Manitoba, Department of Medical Microbiology and Infectious Diseases, Winnipeg, Manitoba, Canada
- Manitoba Centre for Proteomics & Systems Biology, Winnipeg, Manitoba, Canada
| | - Kathleen K. M. Glover
- University of Manitoba, Department of Medical Microbiology and Infectious Diseases, Winnipeg, Manitoba, Canada
- Manitoba Centre for Proteomics & Systems Biology, Winnipeg, Manitoba, Canada
| | - Ang Gao
- Manitoba Centre for Proteomics & Systems Biology, Winnipeg, Manitoba, Canada
| | - Michaela E. Nickol
- University of Manitoba, Department of Medical Microbiology and Infectious Diseases, Winnipeg, Manitoba, Canada
| | - Jason Kindrachuk
- University of Manitoba, Department of Medical Microbiology and Infectious Diseases, Winnipeg, Manitoba, Canada
| | - John A. Wilkins
- Manitoba Centre for Proteomics & Systems Biology, Winnipeg, Manitoba, Canada
- University of Manitoba, Department of Internal Medicine, Health Sciences Centre, Winnipeg, Manitoba, Canada
| | - Kevin M. Coombs
- University of Manitoba, Department of Medical Microbiology and Infectious Diseases, Winnipeg, Manitoba, Canada
- Manitoba Centre for Proteomics & Systems Biology, Winnipeg, Manitoba, Canada
- Children’s Hospital Research Institute of Manitoba, John Buhler Research Centre, Winnipeg, Manitoba, Canada
| |
Collapse
|
10
|
Zhao S, Chen Z, Zheng J, Dai J, Ou W, Xu W, Ai Q, Zhang W, Niu J, Mai K, Zhang Y. Citric acid mitigates soybean meal induced inflammatory response and tight junction disruption by altering TLR signal transduction in the intestine of turbot, Scophthalmus maximus L. Fish Shellfish Immunol 2019; 92:181-187. [PMID: 31176009 DOI: 10.1016/j.fsi.2019.06.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 06/03/2019] [Accepted: 06/05/2019] [Indexed: 05/27/2023]
Abstract
A 12-week feeding trial was conducted to investigate the effect of citric acid on the involvement of TLRs in the soybean meal induced inflammatory response and tight junction disruption in the distal intestine of juvenile turbot (Scophthalmus maximus L.). Four isonitrogenous and isolipidic practical diets were formulated: fish meal-based diet (FM); 40% fish meal protein in FM replaced with soybean meal protein (SBM); SBM + 1.5% citric acid and SBM + 3% citric acid. Compared to the FM, diet SBM significantly increased the gene expression of TLRs (TLR2, TLR3, TLR5b, TLR9, TLR21, TLR22) and MyD88, as well as TLR related molecules (NF-κB, IRF-3, p38 and JNK), which were remarkably reduced by dietary citric acid. Similarly, citric acid supplementation in SBM markedly depressed gene expression of pro-inflammatory cytokines (TNF-α and IFN-γ) and pore-forming tight junction protein Claudin-7, and enhanced gene expression of the anti-inflammatory cytokine TGF-β1 and TJ proteins related to the decrease in paracellular permeability (Claudin-3, Claudin-4, Occludin, Tricellulin and ZO-1). Compared to the SBM, the concentration of IgM and C4 in serum was significantly reduced by dietary citric acid. In brief, dietary citric acid could synchronously inhibit TLRs-dependent inflammatory response regulated by NF-κB and IRF3, as well as cause TLRs-dependent tight junction disruption modulated by p38 and JNK. Therefore, citric acid could function on mitigating soybean meal induced enteropathy in the distal intestine of juvenile turbot.
Collapse
Affiliation(s)
- Sifan Zhao
- The Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture) & the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, PR China
| | - Zhichu Chen
- The Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture) & the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, PR China
| | - Jing Zheng
- The Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture) & the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, PR China
| | - Jihong Dai
- The Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture) & the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, PR China
| | - Weihao Ou
- The Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture) & the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, PR China
| | - Weiqi Xu
- The Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture) & the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, PR China
| | - Qinghui Ai
- The Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture) & the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, PR China
| | - Wenbing Zhang
- The Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture) & the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, PR China
| | - Jin Niu
- Guangdong Provincial Key Laboratory for Aquatic Economic Animals, Guangzhou, 510275, PR China
| | - Kangsen Mai
- The Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture) & the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, PR China; Qingdao National Laboratory for Marine Science and Technology, 1 Wenhai Road, Qingdao, 266237, China
| | - Yanjiao Zhang
- The Key Laboratory of Aquaculture Nutrition and Feed (Ministry of Agriculture) & the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, PR China; Qingdao National Laboratory for Marine Science and Technology, 1 Wenhai Road, Qingdao, 266237, China.
| |
Collapse
|
11
|
Peng C, Ding X, Zhu L, He M, Shu Y, Zhang Y, Li Y, Wang X, Feng S, Li J, Wu J. β-Conglycinin-Induced Intestinal Porcine Epithelial Cell Damage via the Nuclear Factor κB/Mitogen-Activated Protein Kinase Signaling Pathway. J Agric Food Chem 2019; 67:9009-9021. [PMID: 31319030 DOI: 10.1021/acs.jafc.9b02784] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Soybean allergy is a serious health risk to humans and animals; β-conglycinin is the primary antigenic protein in soybean. Intestinal porcine epithelial (IPEC-J2) cells were used as an in vitro physiological model of the intestinal epithelium to study the effects of different concentrations of soybean antigen protein β-conglycinin to identify the involved signaling pathways. The cells were divided into eight groups and either untreated or treated with different concentrations of β-conglycinin, pyrrolidine dithiocarbamate (PDTC), Nω-nitro-l-arginine methyl ester hydrochloride (l-NAME), SP600125, and SB202190 either alone or in combination. The cells were incubated with 1, 5, and 10 mg·mL-1 β-conglycinin or 5 mg·mL-1 β-conglycinin and 1 μmol·L-1 nuclear factor κB (NF-κB) inhibitor (PDTC), inducible nitric oxide synthase inhibitor (l-NAME), c-Jun N-terminal kinase (JNK) inhibitor (SP600125), and p38 inhibitor (SB202190) for 24 h, separately; controls were left untreated. The mRNA, protein, and phosphorylation levels of NF-κB, p38, and JNK were higher in the treated groups than in the control group. β-Conglycinin decreased tight junction distribution, destroyed the cytoskeleton of IPEC-J2 cells, and caused cell death. After the addition of the inhibitors, β-conglycinin-induced IPEC-J2 cell damage was significantly reduced. β-Conglycinin caused damage to IPEC-J2 cells via the mitogen-activated protein kinase/NF-κB signaling pathway. The results of this study are crucial for exploring the mechanisms underlying allergic reactions caused by soybean antigen proteins.
Collapse
Affiliation(s)
- Chenglu Peng
- College of Animal Science and Technology , Anhui Agricultural University , 130 West Changjiang Road , Hefei , Anhui 230036 , People's Republic of China
| | - Xuedong Ding
- College of Animal Science and Technology , Anhui Agricultural University , 130 West Changjiang Road , Hefei , Anhui 230036 , People's Republic of China
| | - Lei Zhu
- College of Animal Science and Technology , Anhui Agricultural University , 130 West Changjiang Road , Hefei , Anhui 230036 , People's Republic of China
| | - Mengchu He
- College of Animal Science and Technology , Anhui Agricultural University , 130 West Changjiang Road , Hefei , Anhui 230036 , People's Republic of China
| | - Yingshuang Shu
- College of Animal Science and Technology , Anhui Agricultural University , 130 West Changjiang Road , Hefei , Anhui 230036 , People's Republic of China
| | - Yu Zhang
- College of Animal Science and Technology , Anhui Agricultural University , 130 West Changjiang Road , Hefei , Anhui 230036 , People's Republic of China
| | - Yu Li
- College of Animal Science and Technology , Anhui Agricultural University , 130 West Changjiang Road , Hefei , Anhui 230036 , People's Republic of China
| | - Xichun Wang
- College of Animal Science and Technology , Anhui Agricultural University , 130 West Changjiang Road , Hefei , Anhui 230036 , People's Republic of China
| | - Shibin Feng
- College of Animal Science and Technology , Anhui Agricultural University , 130 West Changjiang Road , Hefei , Anhui 230036 , People's Republic of China
| | - Jinchun Li
- College of Animal Science and Technology , Anhui Agricultural University , 130 West Changjiang Road , Hefei , Anhui 230036 , People's Republic of China
| | - Jinjie Wu
- College of Animal Science and Technology , Anhui Agricultural University , 130 West Changjiang Road , Hefei , Anhui 230036 , People's Republic of China
| |
Collapse
|
12
|
Xia X, Liu Y, Hodgson A, Xu D, Guo W, Yu H, She W, Zhou C, Lan L, Fu K, Vallance BA, Wan F. EspF is crucial for Citrobacter rodentium-induced tight junction disruption and lethality in immunocompromised animals. PLoS Pathog 2019; 15:e1007898. [PMID: 31251784 PMCID: PMC6623547 DOI: 10.1371/journal.ppat.1007898] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 07/11/2019] [Accepted: 06/05/2019] [Indexed: 12/17/2022] Open
Abstract
Attaching/Effacing (A/E) bacteria include human pathogens enteropathogenic Escherichia coli (EPEC), enterohemorrhagic E. coli (EHEC), and their murine equivalent Citrobacter rodentium (CR), of which EPEC and EHEC are important causative agents of foodborne diseases worldwide. While A/E pathogen infections cause mild symptoms in the immunocompetent hosts, an increasing number of studies show that they produce more severe morbidity and mortality in immunocompromised and/or immunodeficient hosts. However, the pathogenic mechanisms and crucial host-pathogen interactions during A/E pathogen infections under immunocompromised conditions remain elusive. We performed a functional screening by infecting interleukin-22 (IL-22) knockout (Il22-/-) mice with a library of randomly mutated CR strains. Our screen reveals that interruption of the espF gene, which encodes the Type III Secretion System effector EspF (E. coli secreted protein F) conserved among A/E pathogens, completely abolishes the high mortality rates in CR-infected Il22-/- mice. Chromosomal deletion of espF in CR recapitulates the avirulent phenotype without impacting colonization and proliferation of CR, and EspF complement in ΔespF strain fully restores the virulence in mice. Moreover, the expression levels of the espF gene are elevated during CR infection and CR induces disruption of the tight junction (TJ) strands in colonic epithelium in an EspF-dependent manner. Distinct from EspF, chromosomal deletion of other known TJ-damaging effector genes espG and map failed to impede CR virulence in Il22-/- mice. Hence our findings unveil a critical pathophysiological function for EspF during CR infection in the immunocompromised host and provide new insights into the complex pathogenic mechanisms of A/E pathogens.
Collapse
Affiliation(s)
- Xue Xia
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
| | - Yue Liu
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
| | - Andrea Hodgson
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
| | - Dongqing Xu
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
| | - Wenxuan Guo
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
| | - Hongbing Yu
- Division of Gastroenterology, Department of Pediatrics, BC's Children's Hospital and Child and Family Research Institute, Vancouver, British Columbia, Canada
| | - Weifeng She
- Eudowood Division of Pediatric Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Chenxing Zhou
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu, PR China
| | - Lei Lan
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu, PR China
| | - Kai Fu
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
- Institute of Molecular Precision Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Bruce A. Vallance
- Division of Gastroenterology, Department of Pediatrics, BC's Children's Hospital and Child and Family Research Institute, Vancouver, British Columbia, Canada
| | - Fengyi Wan
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD, United States of America
| |
Collapse
|
13
|
Du L, Long Y, Kim JJ, Chen B, Zhu Y, Dai N. Protease Activated Receptor-2 Induces Immune Activation and Visceral Hypersensitivity in Post-infectious Irritable Bowel Syndrome Mice. Dig Dis Sci 2019; 64:729-739. [PMID: 30446929 DOI: 10.1007/s10620-018-5367-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Accepted: 11/07/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND The role of protease activated receptor-2 (PAR-2) in the pathogenesis of abdominal pain in irritable bowel syndrome (IBS) is not well defined. AIMS To investigate the role of PAR-2-mediated visceral hypersensitivity in a post-infectious IBS (PI-IBS) mouse model. METHODS T. spiralis-infected PI-IBS mouse model was used. Fecal serine protease activity and intestinal mast cells were evaluated. Intestinal permeability was assessed by urine lactulose/mannitol ratio, and colonic expressions of PAR-2 and tight junction (TJ) proteins were examined by Western blot. Intestinal immune profile was assessed by measuring Th (T helper) 1/Th2 cytokine expression. Visceral sensitivity was evaluated by abdominal withdrawal reflex in response to colorectal distention. RESULTS Colonic PAR-2 expression as well as fecal serine protease activity and intestinal mast cell counts were elevated in PI-IBS compared to the control mice. Decreased colonic TJ proteins expression, increased lactulose/mannitol ratio, elevated colonic Th1/Th2 cytokine ratio, and visceral hypersensitivity were observed in PI-IBS compared to the control mice. Administration of PAR-2 agonist in control mice demonstrated similar changes observed in PI-IBS mice, while PAR-2 antagonist normalized the increased intestinal permeability and reduced visceral hypersensitivity observed in PI-IBS mice. CONCLUSIONS PAR-2 activation increases intestinal permeability leading to immune activation and visceral hypersensitivity in PI-IBS mouse model.
Collapse
Affiliation(s)
- Lijun Du
- Department of Gastroenterology, School of Medicine, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China
| | - Yanqin Long
- Department of Gastroenterology, School of Medicine, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China.
| | - John J Kim
- Department of Gastroenterology, School of Medicine, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China
- Division of Gastroenterology & Hepatology, Loma Linda University Health, Loma Linda, CA, 92354, USA
| | - Binrui Chen
- Department of Gastroenterology, School of Medicine, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China
| | - Yubin Zhu
- Department of Gastroenterology, School of Medicine, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China
| | - Ning Dai
- Department of Gastroenterology, School of Medicine, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China
| |
Collapse
|
14
|
Wang Y, Wang W, Yang H, Shao D, Zhao X, Zhang G. Intraperitoneal injection of 4-hydroxynonenal (4-HNE), a lipid peroxidation product, exacerbates colonic inflammation through activation of Toll-like receptor 4 signaling. Free Radic Biol Med 2019; 131:237-242. [PMID: 30503401 DOI: 10.1016/j.freeradbiomed.2018.11.037] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 11/12/2018] [Accepted: 11/29/2018] [Indexed: 12/31/2022]
Abstract
Human and animal studies have shown that the colonic concentrations of lipid peroxidation products, such as 4-hydroxynonenal (4-HNE), are elevated in inflammatory bowel disease (IBD). However, the actions and mechanisms of these compounds on the development of IBD are unknown. Here, we show that a systemic treatment of low-dose 4-HNE exacerbates dextran sulfate sodium (DSS)-induced IBD in C57BL/6 mice, suggesting its pro-IBD actions in vivo. Treatment with 4-HNE suppressed colonic expressions of tight-junction protein occludin, impaired intestinal barrier function, enhanced translocation of lipopolysaccharide (LPS) and bacterial products from the gut into systemic circulation, leading to increased activation of Toll-like receptor 4 (TLR4) signaling in vivo. Furthermore, 4-HNE failed to promote DSS-induced IBD in Tlr4-/- mice, supporting that TLR4 signaling contributes to the pro-IBD effects of 4-HNE. Together, these results suggest that 4-HNE exacerbates the progression of IBD through activation of TLR4 signaling, and therefore could contribute to the pathogenesis of IBD.
Collapse
Affiliation(s)
- Yuxin Wang
- College of Life Science, Northwest University, Xi'an, Shaanxi, China; Department of Food Science, University of Massachusetts, Amherst, MA, USA
| | - Weicang Wang
- Department of Food Science, University of Massachusetts, Amherst, MA, USA
| | - Haixia Yang
- Department of Food Science, University of Massachusetts, Amherst, MA, USA
| | - Derek Shao
- Department of Food Science, University of Massachusetts, Amherst, MA, USA
| | - Xinfeng Zhao
- College of Life Science, Northwest University, Xi'an, Shaanxi, China.
| | - Guodong Zhang
- Department of Food Science, University of Massachusetts, Amherst, MA, USA; Molecular and Cellular Biology Graduate Program, University of Massachusetts, Amherst, MA, USA.
| |
Collapse
|
15
|
Mayangsari Y, Suzuki T. Resveratrol Ameliorates Intestinal Barrier Defects and Inflammation in Colitic Mice and Intestinal Cells. J Agric Food Chem 2018; 66:12666-12674. [PMID: 30426751 DOI: 10.1021/acs.jafc.8b04138] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This study is aimed to investigate the ameliorative effect of resveratrol in a dextran sodium sulfate (DSS)-induced colitis mouse model and intestinal Caco-2 cells, focusing on neutrophil infiltration and tight junction (TJ) barriers. DSS administration caused body weight loss (day8, control 104 ± 1, DSS 72 ± 2%, p < 0.05), shortening of colon length (control 5.1 ± 0.1, DSS 3.8 ± 0.1 cm, p < 0.05), pro-inflammatory cytokines increase-including interleukin (IL)-1β (control 1.0 ± 0.2, DSS 58.5 ± 29.6 arbitrary unit (AU), p < 0.05), IL-6 (control 1.0 ± 0.3, DSS 312 ± 82 AU, p < 0.05), and chemokine motif ligand 2 (CXCL-2, a murine IL-8 homologue, control 1.0 ± 0.4, DSS 696 ± 262 AU, p < 0.05), decreased TJ proteins (e.g., occludin, control 1.0 ± 0.05, DSS 0.11 ± 0.03 AU, p < 0.05), and neutrophil infiltration (control 1.2 ± 0.2, DSS 25.9 ± 1.1 cells, p < 0.05). Supplemental resveratrol (0.1% (w/w) in the diet) partially or totally reversed these symptoms (body weight change 100 ± 1, colon length 4.6 ± 0.1; IL-1β 5.9 ± 1.8, IL-6 10 ± 3, CXCL-2 14 ± 7, occludin 0.76 ± 0.06, neutrophil infiltration 9.3 ± 0.7, p < 0.05). Pretreatment of intestinal Caco-2 cells with resveratrol suppressed the TNF-α-induced production of IL-8 (control 1.00 ± 0.04, TNFα 3.40 ± 0.16, TNFα+Res 1.81 ± 0.28 AU, p < 0.05) and phosphorylation of the inflammatory signaling molecules including NF-κB, extracellular signal-regulated kinase and stress c-Jun N-terminal protein kinase. Collectively, the reduction of TJ barrier defect and IL-8 in intestinal cells, leading to reduced neutrophil infiltration into colonic tissues, appears to be one of the central mechanisms for the resveratrol-mediated effect.
Collapse
Affiliation(s)
- Yunika Mayangsari
- Department of Biofunctional Science and Technology, Graduate School of Biosphere Science , Hiroshima University , Kagamiyama, Higashi Hiroshima City 739-8528 , Japan
- Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology , Universitas Gadjah Mada , Sleman, Yogyakarta 55281 , Indonesia
| | - Takuya Suzuki
- Department of Biofunctional Science and Technology, Graduate School of Biosphere Science , Hiroshima University , Kagamiyama, Higashi Hiroshima City 739-8528 , Japan
| |
Collapse
|
16
|
Ahmed I, Roy BC, Raach RMT, Owens SM, Xia L, Anant S, Sampath V, Umar S. Enteric infection coupled with chronic Notch pathway inhibition alters colonic mucus composition leading to dysbiosis, barrier disruption and colitis. PLoS One 2018; 13:e0206701. [PMID: 30383855 PMCID: PMC6211731 DOI: 10.1371/journal.pone.0206701] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 10/12/2018] [Indexed: 12/19/2022] Open
Abstract
Intestinal mucus layer disruption and gut microflora modification in conjunction with tight junction (TJ) changes can increase colonic permeability that allows bacterial dissemination and intestinal and systemic disease. We showed previously that Citrobacter rodentium (CR)-induced colonic crypt hyperplasia and/or colitis is regulated by a functional cross-talk between the Notch and Wnt/β-catenin pathways. In the current study, mucus analysis in the colons of CR-infected (108 CFUs) and Notch blocker Dibenzazepine (DBZ, i.p.; 10μmol/Kg b.w.)-treated mice revealed significant alterations in the composition of trace O-glycans and complex type and hybrid N-glycans, compared to CR-infected mice alone that preceded/accompanied alterations in 16S rDNA microbial community structure and elevated EUB338 staining. While mucin-degrading bacterium, Akkermansia muciniphila (A. muciniphila) along with Enterobacteriaceae belonging to Proteobacteria phyla increased in the feces, antimicrobial peptides Angiogenin-4, Intelectin-1 and Intelectin-2, and ISC marker Dclk1, exhibited dramatic decreases in the colons of CR-infected/DBZ-treated mice. Also evident was a loss of TJ and adherens junction protein immuno-staining within the colonic crypts that negatively impacted paracellular barrier. These changes coincided with the loss of Notch signaling and exacerbation of mucosal injury. In response to a cocktail of antibiotics (Metronidazole/ciprofloxacin) for 10 days, there was increased survival that coincided with: i) decreased levels of Proteobacteria, ii) elevated Dclk1 levels in the crypt and, iii) reduced paracellular permeability. Thus, enteric infections that interfere with Notch activity may promote mucosal dysbiosis that is preceded by changes in mucus composition. Controlled use of antibiotics seems to alleviate gut dysbiosis but may be insufficient to promote colonic crypt regeneration.
Collapse
Affiliation(s)
- Ishfaq Ahmed
- Department of Surgery, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Badal C. Roy
- Department of Surgery, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Rita-Marie T. Raach
- Department of Molecular Biosciences, University of Kansas, Lawrence, Kansas, United States of America
| | - Sarah M. Owens
- Biosciences Division, Argonne National Laboratory, Lemont, Illinois, United States of America
| | - Lijun Xia
- Oklahoma Medical Research Foundation, University of Oklahoma Health Sciences Center Oklahoma City, Oklahoma, United States of America
| | - Shrikant Anant
- Department of Surgery, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Venkatesh Sampath
- Division of Neonatology, Children’s Mercy Hospital, Kansas City, Missouri, United States of America
| | - Shahid Umar
- Department of Surgery, University of Kansas Medical Center, Kansas City, Kansas, United States of America
- * E-mail:
| |
Collapse
|
17
|
Adegoke EO, Wang X, Wang H, Wang C, Zhang H, Zhang G. Selenium (Na 2SeO 3) Upregulates Expression of Immune Genes and Blood-Testis Barrier Constituent Proteins of Bovine Sertoli Cell In Vitro. Biol Trace Elem Res 2018; 185:332-343. [PMID: 29383579 DOI: 10.1007/s12011-018-1248-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 01/11/2018] [Indexed: 01/03/2023]
Abstract
Sertoli cells were isolated from newborn calves and cultured in a medium supplemented with 0, 0.25, 0.50, 0.75, and 1.00 mg/L of sodium selenite to study their immune stimulatory effect, influence on cell's viability, and expression of blood-testis barrier proteins (occludin, connexin-43, zonula occluden, E-cadherin) using quantitative PCR and western blot analyses. Results showed that medium supplemented with 0.50 mg/L of selenium significantly (P < 0.05) promoted cell viability, upregulated toll-like receptor gene (TLR4), anti-inflammatory cytokines (IL-4, IL-10, TGFβ1), and expressions of blood-testis barrier proteins, and modulated expressions of pro-inflammatory cytokines (TNF-α, IL-1β, IFN-γ). Sertoli cells grown in culture medium supplemented with 0.25 mg/L of selenium significantly upregulated TLR4, IL-4, IL-10, TGFβ1, and blood-testis barrier proteins compared to the control group. Sodium selenite supplementation at 0.75 and 1.00 mg/L levels was cytotoxic and temporarily downregulated the expression of blood-testis barrier protein within 24 h after culture; however, commencing from 72 h post culture, increased cell viability and upregulation of expression of blood-testis barrier proteins were observed. In conclusion, the results of this study showed that selenium supplementation in the culture medium up to 0.50 mg/L concentration upregulates immune genes and blood-testis barrier constituent proteins of bovine Sertoli cells.
Collapse
Affiliation(s)
- E O Adegoke
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Xue Wang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Hao Wang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Chen Wang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Han Zhang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Guixue Zhang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China.
| |
Collapse
|
18
|
Lee E, Lee SY, Yoon JS, Jung S, Hong SJ. Mold exposure affects the development of atopic dermatitis in infants with skin barrier dysfunction. Ann Allergy Asthma Immunol 2018; 121:372-374.e1. [PMID: 30220297 DOI: 10.1016/j.anai.2018.06.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 06/20/2018] [Accepted: 06/28/2018] [Indexed: 11/17/2022]
Affiliation(s)
- Eun Lee
- Department of Pediatrics Chonnam National University Hospital Chonnam National University Medical School Gwangju, Republic of Korea
| | - So-Yeon Lee
- Department of Pediatrics Childhood Asthma Atopy Center Environmental Health Center Asan Medical Center University of Ulsan College of Medicine Seoul, Republic of Korea
| | - Ji-Sun Yoon
- Department of Pediatrics Childhood Asthma Atopy Center Environmental Health Center Asan Medical Center University of Ulsan College of Medicine Seoul, Republic of Korea
| | - Sungsu Jung
- Department of Pediatrics Childhood Asthma Atopy Center Environmental Health Center Asan Medical Center University of Ulsan College of Medicine Seoul, Republic of Korea
| | - Soo-Jong Hong
- Department of Pediatrics Childhood Asthma Atopy Center Environmental Health Center Asan Medical Center University of Ulsan College of Medicine Seoul, Republic of Korea.
| |
Collapse
|
19
|
Samadi N, Klems M, Untersmayr E. The role of gastrointestinal permeability in food allergy. Ann Allergy Asthma Immunol 2018; 121:168-173. [PMID: 29803708 DOI: 10.1016/j.anai.2018.05.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 05/04/2018] [Accepted: 05/14/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Nazanin Samadi
- Institute for Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
| | - Martina Klems
- Institute for Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
| | - Eva Untersmayr
- Institute for Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria.
| |
Collapse
|
20
|
Sharma D, Malik A, Guy CS, Karki R, Vogel P, Kanneganti TD. Pyrin Inflammasome Regulates Tight Junction Integrity to Restrict Colitis and Tumorigenesis. Gastroenterology 2018; 154:948-964.e8. [PMID: 29203393 PMCID: PMC5847456 DOI: 10.1053/j.gastro.2017.11.276] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 11/22/2017] [Accepted: 11/28/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND & AIMS Inflammatory bowel diseases (IBD) increase risk for colorectal cancer. Mutations in the Mediterranean fever gene (MEFV or pyrin) are associated with hereditary autoinflammatory disease and severe IBD. Expression of MEFV, a sensor protein that the initiates assembly of the inflammasome complex, is increased in colon biopsies from patients with IBD. We investigated the role of pyrin in intestinal homeostasis in mice. METHODS Mefv-/- mice and C57/BL6 mice (controls) were given azoxymethane followed by multiple rounds of dextran sodium sulfate (DSS) to induce colitis and tumorigenesis. In some experiments, Mefv-/- mice were given injections of recombinant interleukin 18 (rIL18) or saline (control) during DSS administration. Colon tissues were collected at different time points during colitis development and analyzed by histology, immunohistochemistry, immunoblots, or ELISAs (to measure cytokines). Spleen and mesenteric lymph node were collected, processed, and analyzed by flow cytometry. Colon epithelial permeability was measured in mice with colitis by gavage of fluorescent dextran and quantification of serum levels. RESULTS MEFV was expressed in colons of control mice and expression increased during chronic and acute inflammation; high levels were detected in colon tumor and adjacent non-tumor tissues. Mefv-/- mice developed more severe colitis than control mice, with a greater extent of epithelial hyperplasia and a larger tumor burden. Levels of inflammatory cytokines (IL6) and chemokines were significantly higher in colons of Mefv-/- mice than control mice following colitis induction, whereas the level IL18, which depends on the inflammasome for maturation and release, was significantly lower in colons of Mefv-/- mice. Mefv-/- mice had increased epithelial permeability following administration of DSS than control mice, and loss of the tight junction proteins occludin and claudin-2 from intercellular junctions. STAT3 was activated (phosphorylated) in inflamed colon tissues from Mefv-/-, which also had increased expression of stem cell markers (OLFM4, BMI1, and MSI1) compared with colons from control mice. Administration of rIL18 to Mefv-/- mice reduced epithelial permeability, intestinal inflammation, the severity of colitis, and colon tumorigenesis. CONCLUSIONS In studies with DSS-induced colitis, we found that pyrin (MEFV) is required for inflammasome activation and IL18 maturation, which promote intestinal barrier integrity and prevent colon inflammation and tumorigenesis. Strategies to increase activity of MEFV or IL18 might be developed for the treatment of IBD and prevention of colitis-associated tumorigenesis.
Collapse
Affiliation(s)
- Deepika Sharma
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Ankit Malik
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Clifford S Guy
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Rajendra Karki
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Peter Vogel
- Animal Resources Center and the Veterinary Pathology Core, St. Jude Children's Research Hospital, Memphis, Tennessee
| | | |
Collapse
|
21
|
Wang Y, Lin F, Zhu X, Leone VA, Dalal S, Tao Y, Messer JS, Chang EB. Distinct roles of intracellular heat shock protein 70 in maintaining gastrointestinal homeostasis. Am J Physiol Gastrointest Liver Physiol 2018; 314:G164-G178. [PMID: 29051186 PMCID: PMC5866418 DOI: 10.1152/ajpgi.00208.2017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 10/10/2017] [Accepted: 10/11/2017] [Indexed: 01/31/2023]
Abstract
The inducible heat shock protein 70 (Hsp70) is both cytoprotective and immunomodulatory, potentially accounting for its critical role in maintaining gastrointestinal homeostasis. When levels are reduced in conditions like inflammatory bowel diseases (IBD), loss of function contributes to the severity and chronicity of these diseases, although through which cell types and mechanisms remains unclear. Here, the role of Hsp70-mediated intestinal epithelial protection and immune regulation in experimental colitis was examined by using a villin promoter-driven Hsp70 transgene in the 2,4,6-trinitrobenzene sulfonic acid (TNBS) and dextran sodium sulfate (DSS) models and in IL-10/Hsp70 double knockout (IL10-/-/Hsp70-/-) mice. In addition, Hsp70-mediated IL-10 production and immune protection were investigated using a CD45RBhigh transfer model and measuring colonic and immune cell cytokine expression during colitis. We found that the epithelial-specific expression of Hsp70 transgene attenuated DSS-induced colitis in Hsp70-/- mice by protecting tight junctions (TJ) and their interaction with the TJ-associated protein ZO-1. In the TNBS colitis and CD45RBhigh model, Hsp70 carried out its intracellular anti-inflammatory function by maintaining IL-10 production. Impaired ERK phosphorylation, but not p38 or JNK phosphorylation pathways, was associated with decreased IL-10 production in Hsp70-deficient cells. Together, these actions can be leveraged in the context of cellular specificity to develop complementary strategies that can lead to reduction in mucosal injury and immune activation in colonic colitis development. NEW & NOTEWORTHY Using four different experimental colitis models, we filled an important gap in knowledge by defining essential roles of intracellular heat shock protein 70 in different cell types in maintaining intestinal integrity and immune regulation. These findings are relevant to human inflammatory bowel diseases and represent potential avenues for developing therapeutic strategies, not only to counter the destructive processes of inflammation but also to promote tissue healing and prevent complications frequently associated with chronic intestinal inflammation.
Collapse
Affiliation(s)
- Yunwei Wang
- Section of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Knapp Center for Biomedical Discovery, University of Chicago , Chicago, Illinois
| | - Fanfei Lin
- Section of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Knapp Center for Biomedical Discovery, University of Chicago , Chicago, Illinois
| | - Xiaorong Zhu
- Section of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Knapp Center for Biomedical Discovery, University of Chicago , Chicago, Illinois
| | - Vanessa A Leone
- Section of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Knapp Center for Biomedical Discovery, University of Chicago , Chicago, Illinois
| | - Sushila Dalal
- Section of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Knapp Center for Biomedical Discovery, University of Chicago , Chicago, Illinois
| | - Yun Tao
- Section of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Knapp Center for Biomedical Discovery, University of Chicago , Chicago, Illinois
| | - Jeannette S Messer
- Section of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Knapp Center for Biomedical Discovery, University of Chicago , Chicago, Illinois
| | - Eugene B Chang
- Section of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Knapp Center for Biomedical Discovery, University of Chicago , Chicago, Illinois
| |
Collapse
|
22
|
Abstract
Barrier surfaces of multicellular organisms are in constant contact with the environment and infractions to the integrity of epithelial surfaces is likely a frequent event. Interestingly, components of the immune system, that can be activated by environmental compounds such as the microbiota or nutrients, are interspersed among epithelial cells or directly underlie the epithelium. It is now appreciated that immune cells continuously receive and integrate signals from the environment. Curiously, such continuous reception of stimulation does not normally trigger an inflammatory response but mediators produced by immune cells in response to such signals seem to rather promote barrier integrity and repair. The molecular mediators involved in this process are poorly understood. In recent years, the cytokine interleukin-22, produced mainly by group 3 innate lymphoid cells (ILCs), has been studied as a paradigm for how immune cells can control various aspects of epithelial cell function because expression of its receptor is restricted to non-hematopoietic cells. We will summarize here the diverse roles of IL-22 for the malignant transformation of epithelial cells, for tumor growth, wound healing and tissue repair. Furthermore, we will discuss IL-22 as a potential therapeutic target.
Collapse
Affiliation(s)
- Pedro Hernandez
- Institute of Microbiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
- Macrophages et Développement de l'Immunité, Institut Pasteur, Paris Cedex 15, France
- Max-Planck-Institute for Immunobiology und Epigenetics, Freiburg, Germany
| | - Konrad Gronke
- Institute of Microbiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
- Max-Planck-Institute for Immunobiology und Epigenetics, Freiburg, Germany
- Institute of Medical Microbiology and Hygiene and Research Centre Immunology, University of Mainz Medical Centre, Mainz, Germany
| | - Andreas Diefenbach
- Institute of Microbiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| |
Collapse
|
23
|
Wang Y, Mumm JB, Herbst R, Kolbeck R, Wang Y. IL-22 Increases Permeability of Intestinal Epithelial Tight Junctions by Enhancing Claudin-2 Expression. J Immunol 2017; 199:3316-3325. [PMID: 28939759 DOI: 10.4049/jimmunol.1700152] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 08/23/2017] [Indexed: 12/14/2022]
Abstract
Dysfunction of the epithelial barrier is a hallmark of inflammatory intestinal diseases. The intestinal epithelial barrier is maintained by expression of tight junctions that connect adjacent epithelial cells and seal the paracellular space. IL-22 is critical for the maintenance of intestinal barrier function through promoting antipathogen responses and regeneration of epithelial tissues in the gut. However, little is known about the effects of IL-22 on the regulation of tight junctions in the intestinal epithelium. In this study we report that IL-22 signals exclusively through the basolateral side of polarized Caco-2 cell monolayers. IL-22 treatment does not affect the flux of uncharged macromolecules across cell monolayers but significantly reduces transepithelial electrical resistance (TEER), indicating an increase of paracellular permeability for ions. IL-22 treatment on Caco-2 monolayers and on primary human intestinal epithelium markedly induces the expression of Claudin-2, a cation-channel-forming tight junction protein. Furthermore, treatment of IL-22 in mice upregulates Claudin-2 protein in colonic epithelial cells. Knocking down Claudin-2 expression with small interfering RNA reverses the reduction of TEER in IL-22-treated cells. Moreover, IL-22-mediated upregulation of Claudin-2 and loss of TEER can be suppressed with the treatment of JAK inhibitors. In summary, our results reveal that IL-22 increases intestinal epithelial permeability by upregulating Claudin-2 expression through the JAK/STAT pathway. These results provide novel mechanistic insights into the role of IL-22 in the regulation and maintenance of the intestinal epithelial barrier.
Collapse
Affiliation(s)
- Yaya Wang
- Department of Oncology Research, MedImmune, Gaithersburg, MD 20878; and
| | - John Brian Mumm
- Department of Oncology Research, MedImmune, Gaithersburg, MD 20878; and
| | - Ronald Herbst
- Department of Oncology Research, MedImmune, Gaithersburg, MD 20878; and
| | - Roland Kolbeck
- Department of Respiratory, Inflammation and Autoimmune Research, MedImmune, Gaithersburg, MD 20878
| | - Yue Wang
- Department of Oncology Research, MedImmune, Gaithersburg, MD 20878; and
| |
Collapse
|
24
|
Chen S, Bu D, Ma Y, Zhu J, Sun L, Zuo S, Ma J, Li T, Chen Z, Zheng Y, Wang X, Pan Y, Wang P, Liu Y. GYY4137 ameliorates intestinal barrier injury in a mouse model of endotoxemia. Biochem Pharmacol 2016; 118:59-67. [PMID: 27553476 DOI: 10.1016/j.bcp.2016.08.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 08/15/2016] [Indexed: 01/13/2023]
Abstract
Intestinal barrier injury has been reported to play a vital role in the pathogenesis of endotoxemia. This study aimed to investigate the protective effect of GYY4137, a newly synthesized H2S donor, on the intestinal barrier function in the context of endotoxemia both in vitro and in vivo. Caco-2 (a widely used human colon cancer cell line in the study of intestinal epithelial barrier function) monolayers incubated with lipopolysaccharide (LPS) or TNF-α/IFN-γ and a mouse model of endotoxemia were used in this study. The results suggested that GYY4137 significantly attenuated LPS or TNF-α/IFN-γ induced increased Caco-2 monolayer permeability. The decreased expression of TJ (tight junction) proteins induced by LPS and the altered localization of TJs induced by TNF-α/IFN-γ was significantly inhibited by GYY4137; similar results were obtained in vivo. Besides, GYY4137 promoted the clinical score and histological score of mice with endotoxemia. Increased level of TNF-α/IFN-γ in the plasma and increased apoptosis in colon epithelial cells was also attenuated by GYY4137 in mice with endotoxemia. This study indicates that GYY4137 preserves the intestinal barrier function in the context of endotoxemia via multipathways and throws light on the development of potential therapeutic approaches for endotoxemia.
Collapse
Affiliation(s)
- Shanwen Chen
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Dingfang Bu
- Central Laboratory, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Yuanyuan Ma
- Animal Experiment Center, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Jing Zhu
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Lie Sun
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Shuai Zuo
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Ju Ma
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Tengyu Li
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Zeyang Chen
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Youwen Zheng
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Xin Wang
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Yisheng Pan
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Pengyuan Wang
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China.
| | - Yucun Liu
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China.
| |
Collapse
|
25
|
Egan CE, Sodhi CP, Good M, Lin J, Jia H, Yamaguchi Y, Lu P, Ma C, Branca MF, Weyandt S, Fulton WB, Niño DF, Prindle T, Ozolek JA, Hackam DJ. Toll-like receptor 4-mediated lymphocyte influx induces neonatal necrotizing enterocolitis. J Clin Invest 2016; 126:495-508. [PMID: 26690704 DOI: 10.1172/jci83356] [Citation(s) in RCA: 161] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 11/13/2015] [Indexed: 02/06/2023] Open
Abstract
The nature and role of the intestinal leukocytes in necrotizing enterocolitis (NEC), a severe disease affecting premature infants, remain unknown. We now show that the intestine in mouse and human NEC is rich in lymphocytes that are required for NEC development, as recombination activating gene 1–deficient (Rag1–/–) mice were protected from NEC and transfer of intestinal lymphocytes from NEC mice into naive mice induced intestinal inflammation. The intestinal expression of the lipopolysaccharide receptor TLR4, which is higher in the premature compared with full-term human and mouse intestine, is required for lymphocyte influx through TLR4-mediated upregulation of CCR9/CCL25 signaling. TLR4 also mediates a STAT3-dependent polarization toward increased proinflammatory CD3+CD4+IL-17+ and reduced tolerogenic Foxp3+ Treg lymphocytes (Tregs). Th17 lymphocytes were required for NEC development, as inhibition of STAT3 or IL-17 receptor signaling attenuated NEC in mice, while IL-17 release impaired enterocyte tight junctions, increased enterocyte apoptosis, and reduced enterocyte proliferation, leading to NEC. Importantly, TLR4-dependent Th17 polarization could be reversed by the enteral administration of retinoic acid, which induced Tregs and decreased NEC severity. These findings identify an important role for proinflammatory lymphocytes in NEC development via intestinal epithelial TLR4 that could be reversed through dietary modification.
Collapse
MESH Headings
- Animals
- Enterocolitis, Necrotizing/diet therapy
- Enterocolitis, Necrotizing/genetics
- Enterocolitis, Necrotizing/immunology
- Enterocolitis, Necrotizing/pathology
- Enterocytes/immunology
- Enterocytes/pathology
- Humans
- Infant, Newborn
- Infant, Newborn, Diseases/diet therapy
- Infant, Newborn, Diseases/genetics
- Infant, Newborn, Diseases/immunology
- Infant, Newborn, Diseases/pathology
- Mice
- Mice, Knockout
- T-Lymphocytes, Regulatory/immunology
- T-Lymphocytes, Regulatory/pathology
- Th17 Cells/immunology
- Th17 Cells/pathology
- Tight Junctions/genetics
- Tight Junctions/immunology
- Toll-Like Receptor 4/genetics
- Toll-Like Receptor 4/immunology
Collapse
|
26
|
Abstract
Tight junctions (TJs) are complex cell-cell junctions that form a barrier in the stratum granulosum of mammalian skin. Besides forming a barrier themselves, TJs influence other skin barriers, e.g. the stratum corneum barrier, and are influenced by other skin barriers, e.g. by the chemical, the microbiome, or the immunological barrier and likely by the basement membrane. This review summarizes the dynamic interaction of the TJ barrier with other barriers in the skin and the central role of TJs in skin barrier function.
Collapse
Affiliation(s)
- Johanna M Brandner
- Department of Dermatology and Venerology, Laboratory for Cell and Molecular Biology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| |
Collapse
|
27
|
Rooney P, Srivastava A, Watson L, Quinlan LR, Pandit A. Hyaluronic acid decreases IL-6 and IL-8 secretion and permeability in an inflammatory model of interstitial cystitis. Acta Biomater 2015; 19:66-75. [PMID: 25818949 DOI: 10.1016/j.actbio.2015.02.030] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 02/10/2015] [Accepted: 02/13/2015] [Indexed: 12/26/2022]
Abstract
Hyaluronic acid (HA) has received a lot of attention recently as a biomaterial with applications in wound healing, drug delivery, vascular repair and cell and/or gene delivery. Interstitial cystitis (IC) is characterised by an increase in the permeability of the bladder wall urothelium due to loss of the glycosaminoglycan (GAG) layer. The degradation of the urothelium leads to chronic pain and urinary dysfunction. The aetiology of the degradation of the GAG layer in this instance is currently unknown. At a clinical level, GAG replacement therapy using a HA solution is currently utilised as a treatment for IC. However, there is a significant lack of data on the mechanism of action of HA in IC. The current study investigates the mechanistic effect of clinically relevant HA treatment on an in vitro model of IC using urothelial cells, examining cytokine secretion, GAG secretion and trans-epithelial permeability. This study demonstrates that HA can significantly decrease induced cytokine secretion (4-5 fold increase), increase sulphated GAG production (2-fold increase) and without altering tight junction expression, decrease trans-epithelial permeability, suggesting that the HA pathway is a clinical target and potential treatment vector.
Collapse
Affiliation(s)
- Peadar Rooney
- Network of Excellence for Functional Biomaterials, National University of Ireland, Galway, Ireland
| | - Akshay Srivastava
- Network of Excellence for Functional Biomaterials, National University of Ireland, Galway, Ireland
| | - Luke Watson
- Network of Excellence for Functional Biomaterials, National University of Ireland, Galway, Ireland
| | - Leo R Quinlan
- Physiology School of Medicine, National University of Ireland, Galway, Ireland
| | - Abhay Pandit
- Network of Excellence for Functional Biomaterials, National University of Ireland, Galway, Ireland.
| |
Collapse
|
28
|
Lerner A, Matthias T. Changes in intestinal tight junction permeability associated with industrial food additives explain the rising incidence of autoimmune disease. Autoimmun Rev 2015; 14:479-89. [PMID: 25676324 DOI: 10.1016/j.autrev.2015.01.009] [Citation(s) in RCA: 277] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Accepted: 01/18/2015] [Indexed: 12/11/2022]
Abstract
The incidence of autoimmune diseases is increasing along with the expansion of industrial food processing and food additive consumption. The intestinal epithelial barrier, with its intercellular tight junction, controls the equilibrium between tolerance and immunity to non-self-antigens. As a result, particular attention is being placed on the role of tight junction dysfunction in the pathogenesis of AD. Tight junction leakage is enhanced by many luminal components, commonly used industrial food additives being some of them. Glucose, salt, emulsifiers, organic solvents, gluten, microbial transglutaminase, and nanoparticles are extensively and increasingly used by the food industry, claim the manufacturers, to improve the qualities of food. However, all of the aforementioned additives increase intestinal permeability by breaching the integrity of tight junction paracellular transfer. In fact, tight junction dysfunction is common in multiple autoimmune diseases and the central part played by the tight junction in autoimmune diseases pathogenesis is extensively described. It is hypothesized that commonly used industrial food additives abrogate human epithelial barrier function, thus, increasing intestinal permeability through the opened tight junction, resulting in entry of foreign immunogenic antigens and activation of the autoimmune cascade. Future research on food additives exposure-intestinal permeability-autoimmunity interplay will enhance our knowledge of the common mechanisms associated with autoimmune progression.
Collapse
Affiliation(s)
- Aaron Lerner
- Pediatric Gastroenterology and Nutrition Unit, Carmel Medical Center, B, Rappaport School of Medicine, Technion-Israel institute of Technology, Michal St, No. 7, Haifa 34362, Israel.
| | - Torsten Matthias
- Aesku.Kipp Institute, Mikroforum Ring 2, Wendelsheim 55234, Germany.
| |
Collapse
|
29
|
Yu HS, Kang MJ, Kwon JW, Lee SY, Lee E, Yang SI, Jung YH, Hong K, Kim YJ, Lee SH, Kim HJ, Kim HY, Seo JH, Kim BJ, Kim HB, Hong SJ. Claudin-1 polymorphism modifies the effect of mold exposure on the development of atopic dermatitis and production of IgE. J Allergy Clin Immunol 2014; 135:827-30.e5. [PMID: 25512082 DOI: 10.1016/j.jaci.2014.10.040] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 10/29/2014] [Indexed: 11/18/2022]
Affiliation(s)
- Ho-Sung Yu
- Asan Institute for Life Science, Asan Medical Center, Seoul, Korea
| | - Mi-Jin Kang
- Asan Institute for Life Science, Asan Medical Center, Seoul, Korea
| | - Ji-Won Kwon
- Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Korea; Research Center for Standardization of Allergic Diseases, Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - So-Yeon Lee
- Research Center for Standardization of Allergic Diseases, Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Department of Pediatrics, Hallym Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Eun Lee
- Research Center for Standardization of Allergic Diseases, Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Childhood Asthma Atopy Center, Asan Medical Center, Seoul, Korea
| | - Song-I Yang
- Research Center for Standardization of Allergic Diseases, Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Childhood Asthma Atopy Center, Asan Medical Center, Seoul, Korea
| | - Young-Ho Jung
- Research Center for Standardization of Allergic Diseases, Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Childhood Asthma Atopy Center, Asan Medical Center, Seoul, Korea
| | | | - Young-Joon Kim
- Asan Institute for Life Science, Asan Medical Center, Seoul, Korea
| | - Seung-Hwa Lee
- Asan Institute for Life Science, Asan Medical Center, Seoul, Korea
| | - Ha-Jung Kim
- Asan Institute for Life Science, Asan Medical Center, Seoul, Korea
| | - Hyung Young Kim
- Research Center for Standardization of Allergic Diseases, Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Department of Pediatrics, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Ju-Hee Seo
- Research Center for Standardization of Allergic Diseases, Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Department of Pediatrics, Korea Cancer Center Hospital, Seoul, Korea
| | - Byoung-Ju Kim
- Research Center for Standardization of Allergic Diseases, Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Department of Pediatrics, Inje University, Haeundae Paik Hospital, Gimhae, Korea
| | - Hyo-Bin Kim
- Research Center for Standardization of Allergic Diseases, Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Department of Pediatrics, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Soo-Jong Hong
- Research Center for Standardization of Allergic Diseases, Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Childhood Asthma Atopy Center, Asan Medical Center, Seoul, Korea.
| |
Collapse
|
30
|
Abstract
Innate lymphoid cells (ILCs) were first described as playing important roles in the development of lymphoid tissues and more recently in the initiation of inflammation at barrier surfaces in response to infection or tissue damage. It has now become apparent that ILCs play more complex roles throughout the duration of immune responses, participating in the transition from innate to adaptive immunity and contributing to chronic inflammation. The proximity of ILCs to epithelial surfaces and their constitutive strategic positioning in other tissues throughout the body ensures that, in spite of their rarity, ILCs are able to regulate immune homeostasis effectively. Dysregulation of ILC function might result in chronic pathologies such as allergies, autoimmunity, and inflammation. A new role for ILCs in the maintenance of metabolic homeostasis has started to emerge, underlining their importance in fundamental physiological processes beyond infection and immunity.
Collapse
Affiliation(s)
- Andrew N J McKenzie
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QH, UK.
| | - Hergen Spits
- Academic Medical Center, University of Amsterdam, Department of Cell Biology & Histology, 1105BK Amsterdam, the Netherlands
| | - Gerard Eberl
- Institut Pasteur, Lymphoid Tissue Development Unit, Paris 75724, France
| |
Collapse
|
31
|
Osterstock G, El Yandouzi T, Romanò N, Carmignac D, Langlet F, Coutry N, Guillou A, Schaeffer M, Chauvet N, Vanacker C, Galibert E, Dehouck B, Robinson ICAF, Prévot V, Mollard P, Plesnila N, Méry PF. Sustained alterations of hypothalamic tanycytes during posttraumatic hypopituitarism in male mice. Endocrinology 2014; 155:1887-98. [PMID: 24601879 DOI: 10.1210/en.2013-1336] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Traumatic brain injury is a leading cause of hypopituitarism, which compromises patients' recovery, quality of life, and life span. To date, there are no means other than standardized animal studies to provide insights into the mechanisms of posttraumatic hypopituitarism. We have found that GH levels were impaired after inducing a controlled cortical impact (CCI) in mice. Furthermore, GHRH stimulation enhanced GH to lower level in injured than in control or sham mice. Because many characteristics were unchanged in the pituitary glands of CCI mice, we looked for changes at the hypothalamic level. Hypertrophied astrocytes were seen both within the arcuate nucleus and the median eminence, two pivotal structures of the GH axis, spatially remote to the injury site. In the arcuate nucleus, GHRH neurons were unaltered. In the median eminence, injured mice exhibited unexpected alterations. First, the distributions of claudin-1 and zonula occludens-1 between tanycytes were disorganized, suggesting tight junction disruptions. Second, endogenous IgG was increased in the vicinity of the third ventricle, suggesting abnormal barrier properties after CCI. Third, intracerebroventricular injection of a fluorescent-dextran derivative highly stained the hypothalamic parenchyma only after CCI, demonstrating an increased permeability of the third ventricle edges. This alteration of the third ventricle might jeopardize the communication between the hypothalamus and the pituitary gland. In conclusion, the phenotype of CCI mice had similarities to the posttraumatic hypopituitarism seen in humans with intact pituitary gland and pituitary stalk. It is the first report of a pathological status in which tanycyte dysfunctions appear as a major acquired syndrome.
Collapse
Affiliation(s)
- Guillaume Osterstock
- INSERM Unité 661 (G.O., T.E.Y., N.Co., N.R., A.G., M.S., N.Ch., E.G., P.M., P.-F.M.), Centre National de la Recherche Scientifique Unité Mixte de Recherche 5203 (G.O., T.E.Y., N.R., N.Co., A.G., M.S., N.Ch., E.G., P.M., P.-F.M.), Institut de Génomique Fonctionelle, 34094 Montpellier, France; Université Montpellier 1, 2 (G.O., T.E.Y., N.R., N.Co., A.G., M.S., N.Ch., E.G., P.M., P.-F.M.), 34967 Montpellier, France; Division of Molecular Neuroendocrinology (D.C., I.C.A.F.R.), Medical Research Council National Institute for Medical Research, The Ridgeway, Mill Hill, London NW7 1AA, United Kingdom; Royal College of Surgeons in Ireland (G.O., T.E.Y., M.S., N.P.), Dublin 2, Ireland; INSERM Unité 837 (F.L., C.V., B.D., V.P.), Department of Development and Plasticity of the Postnatal Brain, Jean-Pierre Aubert Research Center, 59045 Lille, France; and University of Lille 2 (F.L., C.V., B.D., V.P.), 59000 Lille, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Yin H, Kosa P, Liu X, Swaim WD, Lai Z, Cabrera-Perez J, Di Pasquale G, Ambudkar IS, Bugge TH, Chiorini JA. Matriptase deletion initiates a Sjögren's syndrome-like disease in mice. PLoS One 2014; 9:e82852. [PMID: 24551030 PMCID: PMC3923742 DOI: 10.1371/journal.pone.0082852] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 10/28/2013] [Indexed: 11/24/2022] Open
Abstract
Objective The objective of this study was to determine the effect of epithelial barrier disruption, caused by deficiency of the membrane-anchored serine protease, matriptase, on salivary gland function and the induction of autoimmunity in an animal model. Methods Embryonic and acute ablation of matriptase expression in the salivary glands of mice was induced, leading to decreased epithelial barrier function. Mice were characterized for secretory epithelial function and the induction of autoimmunity including salivary and lacrimal gland dysfunction, lymphocytic infiltration, serum anti-Ro/SSA, anti-La/SSB and antinuclear antibodies. Salivary glands immune activation/regulation, barrier function as well as tight junction proteins expression also were determined. Expression of matriptase in minor salivary gland biopsies was compared among pSS patients and healthy volunteers. Results Embryonic ablation of matriptase expression in mice resulted in the loss of secretory epithelial cell function and the induction of autoimmunity similar to that observed in primary Sjögren’s syndrome. Phenotypic changes included exocrine gland dysfunction, lymphocytic infiltrates, production of Sjögren’s syndrome-specific autoantibodies, and overall activation of the immune system. Acute ablation of matriptase expression resulted in significant salivary gland dysfunction in the absence of overt immune activation. Analysis of the salivary glands indicates a loss of electrical potential across the epithelial layer as well as altered distribution of a tight junction protein. Moreover, a significant decrease in matriptase gene expression was detected in the minor salivary glands of pSS patients compared with healthy volunteers. Conclusions Our findings demonstrate that local impairment of epithelial barrier function can lead to loss of exocrine gland dysfunction in the absence of inflammation while systemic deletion can induce a primary Sjögren’s syndrome like phenotype with autoimmunity and loss of gland function.
Collapse
Affiliation(s)
- Hongen Yin
- Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail: (JAC); (HY)
| | - Peter Kosa
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Xibao Liu
- Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - William D. Swaim
- Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Zhennan Lai
- Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Javier Cabrera-Perez
- Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Giovanni Di Pasquale
- Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Indu S. Ambudkar
- Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Thomas H. Bugge
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - John A. Chiorini
- Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail: (JAC); (HY)
| |
Collapse
|
33
|
Fiorentino M, Levine MM, Sztein MB, Fasano A. Effect of wild-type Shigella species and attenuated Shigella vaccine candidates on small intestinal barrier function, antigen trafficking, and cytokine release. PLoS One 2014; 9:e85211. [PMID: 24416363 PMCID: PMC3887025 DOI: 10.1371/journal.pone.0085211] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 11/27/2013] [Indexed: 01/22/2023] Open
Abstract
Bacterial dysentery due to Shigella species is a major cause of morbidity and mortality worldwide. The pathogenesis of Shigella is based on the bacteria's ability to invade and replicate within the colonic epithelium, resulting in severe intestinal inflammatory response and epithelial destruction. Although the mechanisms of pathogenesis of Shigella in the colon have been extensively studied, little is known on the effect of wild-type Shigella on the small intestine and the role of the host response in the development of the disease. Moreover, to the best of our knowledge no studies have described the effects of apically administered Shigella flexneri 2a and S. dysenteriae 1 vaccine strains on human small intestinal enterocytes. The aim of this study was to assess the coordinated functional and immunological human epithelial responses evoked by strains of Shigella and candidate vaccines on small intestinal enterocytes. To model the interactions of Shigella with the intestinal mucosa, we apically exposed monolayers of human intestinal Caco2 cells to increasing bacterial inocula. We monitored changes in paracellular permeability, examined the organization of tight-junctions and the pro-inflammatory response of epithelial cells. Shigella infection of Caco2 monolayers caused severe mucosal damage, apparent as a drastic increase in paracellular permeability and disruption of tight junctions at the cell-cell boundary. Secretion of pro-inflammatory IL-8 was independent of epithelial barrier dysfunction. Shigella vaccine strains elicited a pro-inflammatory response without affecting the intestinal barrier integrity. Our data show that wild-type Shigella infection causes a severe alteration of the barrier function of a small intestinal cell monolayer (a proxy for mucosa) and might contribute (along with enterotoxins) to the induction of watery diarrhea. Diarrhea may be a mechanism by which the host attempts to eliminate harmful bacteria and transport them from the small to the large intestine where they invade colonocytes inducing a strong inflammatory response.
Collapse
Affiliation(s)
- Maria Fiorentino
- Mucosal Immunology and Biology Research Center, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Myron M. Levine
- Center for Vaccine Development and the Departments of Pediatrics and Medicine, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Marcelo B. Sztein
- Center for Vaccine Development and the Departments of Pediatrics and Medicine, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Alessio Fasano
- Mucosal Immunology and Biology Research Center, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| |
Collapse
|
34
|
Vaziri ND, Yuan J, Khazaeli M, Masuda Y, Ichii H, Liu S. Oral activated charcoal adsorbent (AST-120) ameliorates chronic kidney disease-induced intestinal epithelial barrier disruption. Am J Nephrol 2013; 37:518-25. [PMID: 23689670 PMCID: PMC3777856 DOI: 10.1159/000351171] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 04/04/2013] [Indexed: 12/11/2022]
Abstract
BACKGROUND Chronic kidney disease (CKD) impairs intestinal barrier function which by allowing influx of noxious products causes systemic inflammation. We have recently shown that intestinal barrier dysfunction in CKD is due to degradation of epithelial tight junction (TJ) which is, in part, mediated by influx of urea and its conversion to ammonia by microbial urease. We hypothesized that by adsorbing urea and urea-derived ammonia, oral activated charcoal (AST-120) may ameliorate CKD-induced intestinal epithelial barrier disruption and systemic inflammation. METHODS Rats were randomized to the CKD or control groups. The CKD group was fed a chow containing 0.7% adenine for 2 weeks. They were then randomized to receive a chow with or without AST-120 (4 g/kg/day) for 2 weeks. Rats consuming regular diet served as controls. Animals were then euthanized, colons were removed and processed for Western blot and immunohistology, and plasma was used to measure endotoxin and oxidative and inflammatory markers. RESULTS Compared with the controls, the untreated CKD rats showed elevated plasma endotoxin, IL-6, TNF-α, MCP-1, CINC-3, L-selectin, ICAM-1, and malondialdehyde, and depletions of colonic epithelial TJ proteins, claudin-1, occludin, and ZO1. Administration of AST-120 resulted in partial restoration of the epithelial TJ proteins and reduction in plasma endotoxin and markers of oxidative stress and inflammation. CONCLUSIONS CKD animals exhibited depletion of the key protein constituents of the colonic epithelial TJ which was associated with systemic inflammation, oxidative stress and endotoxemia. Administration of AST-120 attenuated uremia-induced disruption of colonic epithelial TJ and the associated endotoxemia, oxidative stress and inflammation.
Collapse
Affiliation(s)
- Nosratola D Vaziri
- Division of Nephrology and Hypertension, University of California, Irvine, Calif., USA.
| | | | | | | | | | | |
Collapse
|
35
|
Suzuki T. Regulation of intestinal epithelial permeability by tight junctions. Cell Mol Life Sci 2013; 70:631-59. [PMID: 22782113 DOI: 10.1007/s00018-012-1070-x] [Citation(s) in RCA: 827] [Impact Index Per Article: 75.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Revised: 06/19/2012] [Accepted: 06/21/2012] [Indexed: 12/13/2022]
Abstract
The gastrointestinal epithelium forms the boundary between the body and external environment. It effectively provides a selective permeable barrier that limits the permeation of luminal noxious molecules, such as pathogens, toxins, and antigens, while allowing the appropriate absorption of nutrients and water. This selective permeable barrier is achieved by intercellular tight junction (TJ) structures, which regulate paracellular permeability. Disruption of the intestinal TJ barrier, followed by permeation of luminal noxious molecules, induces a perturbation of the mucosal immune system and inflammation, and can act as a trigger for the development of intestinal and systemic diseases. In this context, much effort has been taken to understand the roles of extracellular factors, including cytokines, pathogens, and food factors, for the regulation of the intestinal TJ barrier. Here, I discuss the regulation of the intestinal TJ barrier together with its implications for the pathogenesis of diseases.
Collapse
Affiliation(s)
- Takuya Suzuki
- Department of Biofunctional Science and Technology, Graduate School of Biosphere Science, Hiroshima University, 1-4-4, Kagamiyama, Higashi-Hiroshima, 739-8528, Japan.
| |
Collapse
|
36
|
Soyka MB, Wawrzyniak P, Eiwegger T, Holzmann D, Treis A, Wanke K, Kast JI, Akdis CA. Defective epithelial barrier in chronic rhinosinusitis: the regulation of tight junctions by IFN-γ and IL-4. J Allergy Clin Immunol 2012; 130:1087-1096.e10. [PMID: 22840853 DOI: 10.1016/j.jaci.2012.05.052] [Citation(s) in RCA: 332] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2011] [Revised: 05/25/2012] [Accepted: 05/30/2012] [Indexed: 02/03/2023]
Abstract
BACKGROUND Chronic rhinosinusitis (CRS) is a common disease with still unclear pathophysiologic mechanisms. Epithelial tight junctions (TJs) have been shown to be involved in different chronic disorders, including bronchial asthma, inflammatory bowel diseases, and skin disorders. The regulation of epithelial barrier function and TJ expression has not been extensively studied in patients with CRS and in the paranasal sinus epithelium thus far. OBJECTIVE We sought to elucidate the TJ expression pattern in the epithelium of the sinonasal mucosa and its regulation in patients with CRS. METHODS Trans-tissue resistance was measured in biopsy specimens from healthy control subjects and patients with CRS with and without nasal polyps. TJ protein expression was determined by using immunofluorescence, Western blotting, and real-time PCR. Primary epithelial cell cultures from patients with CRS and control subjects were used in air-liquid interface (ALI) cultures for the measurement of transepithelial resistance (TER) and TJ expression. The effect of IFN-γ, IL-4, and IL-17 on ALI cultures was assessed. RESULTS A decreased trans-tissue resistance was found in biopsy specimens from patients with CRS with nasal polyps along with an irregular, patchy, and decreased expression of the TJ molecules occludin and zonula occludens 1. TER was reduced in ALI cultures from patients with CRS with nasal polyps. The cytokines IFN-γ and IL-4 decreased TER, whereas IL-17 did not have any influence on epithelial integrity. CONCLUSION A defective epithelial barrier was found in patients with CRS with nasal polyps along with a decreased expression of TJ proteins. The disruption of epithelial integrity by IFN-γ and IL-4 in vitro indicates a possible role for these proinflammatory cytokines in the pathogenesis of patients with CRS.
Collapse
Affiliation(s)
- Michael B Soyka
- Swiss Institute of Allergy and Asthma Research (SIAF), University of Zurich, Davos, Switzerland
| | | | | | | | | | | | | | | |
Collapse
|
37
|
Al-Sadi R, Guo S, Dokladny K, Smith MA, Ye D, Kaza A, Watterson DM, Ma TY. Mechanism of interleukin-1β induced-increase in mouse intestinal permeability in vivo. J Interferon Cytokine Res 2012; 32:474-84. [PMID: 22817402 DOI: 10.1089/jir.2012.0031] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
UNLABELLED Interleukin-1β (IL-1β) has been shown to play an essential role in mediating intestinal inflammation of Crohn's disease and other inflammatory conditions of the gut. Previous studies from our laboratory have shown that IL-1β causes an increase in intestinal tight-junction permeability in Caco-2 monolayers in vitro. However, the IL-1β effect on the intestinal epithelial barrier in vivo remains unclear. AIMS the major aims of this study were to examine the effect of IL-1β on mouse intestinal epithelial barrier in vivo and to delineate the mechanisms involved using an in vivo model system consisting of a recycling perfusion of mouse small intestine. Intraperitonial injection of IL-1β at varying doses (0-10 μg) caused a concentration-dependent increase in mouse intestinal permeability to the paracellular marker dextran (10 KD), and the maximal increase in dextran flux occurred at IL-1β dose of 5 μg. IL-1β treatment caused an increase in myosin light-chain kinase (MLCK) mRNA and protein expression in the small intestinal tissue starting at 24 h, which continued up to 72 h. Additionally, IL-1β did not cause an increase in intestinal permeability in MLCK-deficient mice (C57BL/6 MLCK(-/-)). MLCK inhibitor ML-7 (2 mg/kg body weight) also inhibited the IL-1β-induced increase in small intestinal permeability. The IL-1β-induced increase in mouse intestinal permeability was associated with an increase in NF-κB activation. The intestinal tissue-specific silencing of NF-κB p65 inhibited the IL-1β-induced increase in intestinal permeability and increase in MLCK expression. These data show for the first time that IL-1β causes an increase in mouse intestinal permeability in vivo. These data suggested that the mechanism of IL-1β-induced increase in mouse intestinal permeability in vivo involved NF-κB p65-induced activation of the mouse enterocyte MLCK gene.
Collapse
Affiliation(s)
- Rana Al-Sadi
- Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, New Mexico, USA
| | | | | | | | | | | | | | | |
Collapse
|
38
|
França LR, Auharek SA, Hess RA, Dufour JM, Hinton BT. Blood-tissue barriers: morphofunctional and immunological aspects of the blood-testis and blood-epididymal barriers. Adv Exp Med Biol 2012; 763:237-259. [PMID: 23397628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The blood-testis barrier (BTB) is known for its ability to create an immune privilege site in the seminiferous epithelium, but less is known of the blood-epididymal barrier (BEB). It is already established that the fully functional BTB and BEB are much more complex and consist of anatomical/physical (tight junctions, basolateral and apical membranes), physiological and immunological components, which are all necessary to make a functioning barrier in the testis and epididymis. However, comparative data for metazoans suggest that an effective Sertoli cell barrier is not entirely necessary for the development of germ cells during spermatogenesis or that our knowledge about the barrier structure/function in metazoans is still immature. This chapter compares the unique barrier formed by the Sertoli cells of the testis to that formed by the apical junctional complexes of the epididymal epithelium.
Collapse
Affiliation(s)
- Luiz R França
- Department of Morphology, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
| | | | | | | | | |
Collapse
|
39
|
Li X, Akhtar S, Choudhry MA. Alteration in intestine tight junction protein phosphorylation and apoptosis is associated with increase in IL-18 levels following alcohol intoxication and burn injury. Biochim Biophys Acta Mol Basis Dis 2011; 1822:196-203. [PMID: 22001439 DOI: 10.1016/j.bbadis.2011.09.019] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 09/08/2011] [Accepted: 09/29/2011] [Indexed: 12/14/2022]
Abstract
Intestinal mucosal barrier is the first line of defense against bacteria and their products originating from the intestinal lumen. We have shown a role for IL-18 in impaired gut barrier function following acute alcohol (EtOH) intoxication combined with burn injury. To further delineate the mechanism, this study examined whether IL-18 alters intestine tight junction proteins or induces mucosal apoptosis under these conditions. To accomplish this, rats were gavaged with EtOH (3.2g/kg) prior to ~12.5% total body surface area burn or sham injury. One day after injury, EtOH combined with burn injury resulted in a significant decrease in total occludin protein and its phosphorylation in small intestine compared to either EtOH or burn injury alone. There was no change in claudin-1 protein content but its phosphorylation on tyrosine was decreased following EtOH and burn injury. This was accompanied with an increase in mucosal apoptosis (p<0.05). The treatment of rats with anti-IL-18 antibody at the time of burn injury prevented intestine apoptosis and normalized tight junction proteins following EtOH and burn injury. Altogether, these findings suggest that IL-18 modulates tight junction proteins and cause apoptosis leading to impaired intestinal mucosal integrity following EtOH intoxication combined with burn injury.
Collapse
Affiliation(s)
- Xiaoling Li
- Department of Surgery, Loyola University Chicago Stritch School of Medicine, 2160 South First Ave, Maywood, IL 60153, USA
| | | | | |
Collapse
|
40
|
Himi T, Takano KI, Ogasawara N, Go M, Kurose M, Koizumi JI, Kamekura R, Kondo A, Ohkuni T, Masaki T, Kojima T, Sawada N, Tsutsumi H. Mucosal immune barrier and antigen-presenting system in human nasal epithelial cells. Adv Otorhinolaryngol 2011; 72:28-30. [PMID: 21865683 DOI: 10.1159/000324590] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The upper respiratory tract including the nasal cavity, which is the first site of invading antigen exposure, plays a crucial role in host defense via the mucosal immune response. The epithelium of nasal mucosa forms a continuous barrier against a wide variety of exogenous antigens. The epithelial barrier function is regulated in large part by the apical-most intercellular junction, referred to as the tight junction. Antigen-presenting cells, particularly dendritic cells (DCs), are known to play an important role in human nasal mucosa. Recently, the author and colleagues discovered a new mechanism for pathogen uptake in the nasal mucosa, by which DCs open the tight junctions between epithelial cells and send dendrites outside the epithelium to directly sample the pathogen. In order to preserve the integrity of the epithelial barrier and penetrate beyond well-developed epithelial tight junctions, DCs express tight junction proteins. We also found that these DCs are activated by nasal epithelial-derived TSLP induced by stimuli such as cytokines and Toll-like receptor ligands. In this lecture, I will talk about the novel mechanisms in host defense in terms of innate immunity of the nasal mucosa from the point of view of the mucosal barrier function.
Collapse
Affiliation(s)
- Tetsuo Himi
- Department of Otolaryngology, Sapporo Medical University School of Medicine, Sapporo, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Gaur D, Chitnis CE. Molecular interactions and signaling mechanisms during erythrocyte invasion by malaria parasites. Curr Opin Microbiol 2011; 14:422-8. [PMID: 21803641 DOI: 10.1016/j.mib.2011.07.018] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2011] [Revised: 07/11/2011] [Accepted: 07/12/2011] [Indexed: 01/24/2023]
Abstract
Invasion of erythrocytes by Plasmodium merozoites is a complex process that is mediated by specific molecular interactions. Here, we review recent studies on interactions between erythrocyte binding antigens (EBA) and PfRH proteins from the parasite and erythrocyte receptors involved in invasion. The timely release of these parasite ligands from internal organelles such as micronemes and rhoptries to the merozoite surface is critical for receptor-engagement leading to successful invasion. We review information on signaling mechanisms that control the regulated secretion of parasite proteins during invasion. Erythrocyte invasion involves the formation and movement of a junction between the invading merozoite and host erythrocyte. We review recent studies on the molecular composition of the junction and the molecular motor that drives movement of the junction.
Collapse
Affiliation(s)
- Deepak Gaur
- International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | | |
Collapse
|
42
|
Mariano C, Silva SL, Pereira P, Fernandes A, Brites D, Brito MA. Evidence of tricellulin expression by immune cells, particularly microglia. Biochem Biophys Res Commun 2011; 409:799-802. [PMID: 21624353 DOI: 10.1016/j.bbrc.2011.05.093] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Accepted: 05/16/2011] [Indexed: 12/13/2022]
Abstract
Tight junctions (TJs) are elaborate structures located on the apical region of epithelial cells that limit paracellular permeability. Tricellulin is a recently discovered TJ protein, which is concentrated at the structurally specialized tricellular TJs but also present at bicellular contacts between epithelial cells, namely in the stomach. Interestingly, several TJ proteins have been found in other than epithelial cells, as astrocytes, and tricellulin mRNA expression was reported in mature dendritic cells. These findings prompted us to look for tricellulin expression in both epithelial and immune cells in the stomach, as well as in microglia, the brain resident immunocompetent cells. Immunohistochemical analysis of human stomach tissue sections revealed peroxidase staining at three-corner contact sites, as well as at the contact between two adjacent epithelial cells, thus evidencing the expression of tricellulin not only at tricellullar but at bicellular junctions as well. Such analysis, further revealed tricellulin immunostaining in cells of the monocyte/macrophage lineage, scattered throughout the lamina propria. Cultured rat microglia exhibited a notorious tricellulin staining, consistent with an extensive expression of the protein along the cell, which was not absolutely coincident with the lysosomal marker CD68. Detection of mRNA expression by real-time PCR provided supportive evidence for the expression of the TJ protein in microglia. These data demonstrate for the first time that microglia express a TJ protein. Moreover, the expression of tricellulin both in microglia and in the stomach immune cells point to a possible role of this new TJ protein in the immune system.
Collapse
Affiliation(s)
- Cibelle Mariano
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | | | | | | | | | | |
Collapse
|
43
|
Suidan GL, Mcdole JR, Chen Y, Pirko I, Johnson AJ. Induction of blood brain barrier tight junction protein alterations by CD8 T cells. PLoS One 2008; 3:e3037. [PMID: 18725947 PMCID: PMC2516328 DOI: 10.1371/journal.pone.0003037] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2008] [Accepted: 08/03/2008] [Indexed: 11/19/2022] Open
Abstract
Disruption of the blood brain barrier (BBB) is a hallmark feature of immune-mediated neurological disorders as diverse as viral hemorrhagic fevers, cerebral malaria and acute hemorrhagic leukoencephalitis. Although current models hypothesize that immune cells promote vascular permeability in human disease, the role CD8 T cells play in BBB breakdown remains poorly defined. Our laboratory has developed a novel murine model of CD8 T cell mediated central nervous system (CNS) vascular permeability using a variation of the Theiler's virus model of multiple sclerosis. In previous studies, we observed that MHC class II−/− (CD4 T cell deficient), IFN-γR−/−, TNF-α−/−, TNFR1−/−, TNFR2−/−, and TNFR1/TNFR2 double knockout mice as well as those with inhibition of IL-1 and LTβ activity were susceptible to CNS vascular permeability. Therefore, the objective of this study was to determine the extent immune effector proteins utilized by CD8 T cells, perforin and FasL, contributed to CNS vascular permeability. Using techniques such as fluorescent activated cell sorting (FACS), T1 gadolinium-enhanced magnetic resonance imaging (MRI), FITC-albumin leakage assays, microvessel isolation, western blotting and immunofluorescent microscopy, we show that in vivo stimulation of CNS infiltrating antigen-specific CD8 T cells initiates astrocyte activation, alteration of BBB tight junction proteins and increased CNS vascular permeability in a non-apoptotic manner. Using the aforementioned techniques, we found that despite having similar expansion of CD8 T cells in the brain as wildtype and Fas Ligand deficient animals, perforin deficient mice were resistant to tight junction alterations and CNS vascular permeability. To our knowledge, this study is the first to demonstrate that CNS infiltrating antigen-specific CD8 T cells have the capacity to initiate BBB tight junction disruption through a non-apoptotic perforin dependent mechanism and our model is one of few that are useful for studies in this field. These novel findings are highly relevant to the development of therapies designed to control immune mediated CNS vascular permeability.
Collapse
Affiliation(s)
- Georgette L. Suidan
- Neuroscience Department, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
- Neurology Department, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Jeremiah R. Mcdole
- Neuroscience Department, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
- Neurology Department, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Yi Chen
- Neurology Department, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Istvan Pirko
- Neuroscience Department, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
- Neurology Department, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Aaron J. Johnson
- Neuroscience Department, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
- Neurology Department, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
- * E-mail:
| |
Collapse
|
44
|
Morrow CMK, Hostetler CE, Griswold MD, Hofmann MC, Murphy KM, Cooke S, Hess RA. ETV5 is required for continuous spermatogenesis in adult mice and may mediate blood testes barrier function and testicular immune privilege. Ann N Y Acad Sci 2007; 1120:144-51. [PMID: 17911411 PMCID: PMC2733827 DOI: 10.1196/annals.1411.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The transcription factor Ets-variant gene 5 (ETV5) is essential for spermatogonial stem cell (SSC) self-renewal, as the targeted deletion of the Etv5 gene in mice (Etv5(-/-)) results in only the first wave of spermatogenesis. Reciprocal transplants of neonatal germ cells from wild-type (WT) and Etv5(-/-) testes were performed to determine the role of ETV5 in Sertoli cells and germ cells. ETV5 appears to be needed in both cell types for normal spermatogenesis. In addition, Etv5(-/-) recipients displayed increased interstitial inflammation and tubular involution after transplantation. Preliminary studies suggest that the blood-testis barrier (Sertoli-Sertoli tight junctional complex) is abnormal in the Etv5(-/-) mouse.
Collapse
Affiliation(s)
- Carla M. K. Morrow
- Department of Veterinary Bioscience, University of Illinois at Urbana-Champaign, Urbana, IL 61802
| | - Chris E. Hostetler
- School of Molecular Biosciences, College of Sciences, Washington State University, Pullman, WA 99164
| | - Mike D. Griswold
- School of Molecular Biosciences, College of Sciences, Washington State University, Pullman, WA 99164
| | - Marie-Claude Hofmann
- Department of Veterinary Bioscience, University of Illinois at Urbana-Champaign, Urbana, IL 61802
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61802
| | - Kenneth M. Murphy
- Department of Pathology and Immunology, School of Medicine, Washington University, St. Louis, MO 63110
- Howard Hughes Medical Institute
| | - S. Cooke
- Department of Veterinary Bioscience, University of Illinois at Urbana-Champaign, Urbana, IL 61802
| | - Rex A. Hess
- Department of Veterinary Bioscience, University of Illinois at Urbana-Champaign, Urbana, IL 61802
- Corresponding Author: Dr. Rex A. Hess, Vet. Biosciences, 2001 S Lincoln Ave, Urbana, IL 61802; Phone: (217); Fax: (217) 244-1652; e-mail:
| |
Collapse
|
45
|
Abstract
Migration of leukocytes into tissue is a key element of innate and adaptive immunity. While the capturing of leukocytes to the blood vessel wall is well understood, little is known about the mechanisms underlying the actual transmigration of leukocytes through the vessel wall (diapedesis). Even a basic question such as whether leukocytes migrate through openings between adjacent endothelial cells (junctional pathway) or through single endothelial cells (transcellular pathway) is still a matter of intensive debate. It is generally accepted that both pathways exist; however, whether they are of equal physiological significance is unclear. Several endothelial adhesion and signaling molecules have been identified, most of them at endothelial cell contacts, which participate in leukocyte diapedesis. A concept is evolving suggesting that transendothelial migration of leukocytes is a stepwise process. Blocking or eliminating some of the different adhesion and signaling proteins results in very different effects, such as trapping of leukocytes above endothelial cell contacts, in between endothelial cells, or between the endothelium and the underlying basement membrane. Other proteins are involved in the opening of endothelial cell contacts and yet others in their maintenance providing the barrier for extravasating leukocytes. The various molecular players and the functional steps involved in diapedesis are discussed.
Collapse
|
46
|
Afonso PV, Ozden S, Prevost MC, Schmitt C, Seilhean D, Weksler B, Couraud PO, Gessain A, Romero IA, Ceccaldi PE. Human Blood-Brain Barrier Disruption by Retroviral-Infected Lymphocytes: Role of Myosin Light Chain Kinase in Endothelial Tight-Junction Disorganization. J Immunol 2007; 179:2576-83. [PMID: 17675520 DOI: 10.4049/jimmunol.179.4.2576] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The blood-brain barrier (BBB), which constitutes the interface between blood and cerebral parenchyma, has been shown to be disrupted during retroviral associated neuromyelopathies. Human T cell leukemia virus (HTLV-1)-associated myelopathy/tropical spastic paraparesis is a slowly progressive neurodegenerative disease, in which evidence of BBB breakdown has been demonstrated by the presence of lymphocytic infiltrates in the CNS and plasma protein leakage through cerebral endothelium. Using an in vitro human BBB model, we investigated the cellular and molecular mechanisms involved in endothelial changes induced by HTLV-1-infected lymphocytes. We demonstrate that coculture with infected lymphocytes induces an increase in paracellular endothelial permeability and transcellular migration, via IL-1alpha and TNF-alpha secretion. This disruption is associated with tight junction disorganization between endothelial cells, and alterations in the expression pattern of tight junction proteins such as zonula occludens 1. These changes could be prevented by inhibition of the NF-kappaB pathway or of myosin light chain kinase activity. Such disorganization was confirmed in histological sections of spinal cord from an HTLV-1-associated myelopathy/tropical spastic paraparesis patient. Based on this BBB model, the present data indicate that HTLV-1-infected lymphocytes can induce BBB breakdown and may be responsible for the CNS infiltration that occurs in the early steps of retroviral-associated neuromyelopathies.
Collapse
MESH Headings
- Blood-Brain Barrier/enzymology
- Blood-Brain Barrier/immunology
- Blood-Brain Barrier/pathology
- Blood-Brain Barrier/ultrastructure
- Blood-Brain Barrier/virology
- Cell Line, Transformed
- Cerebellum/blood supply
- Cerebellum/enzymology
- Cerebellum/immunology
- Cerebellum/ultrastructure
- Endothelial Cells/enzymology
- Endothelial Cells/immunology
- Endothelial Cells/pathology
- Endothelial Cells/virology
- Endothelium, Vascular/enzymology
- Endothelium, Vascular/immunology
- Endothelium, Vascular/pathology
- Endothelium, Vascular/virology
- Human T-lymphotropic virus 1/immunology
- Humans
- Interleukin-1alpha/immunology
- Interleukin-1alpha/metabolism
- Lymphocytes/immunology
- Lymphocytes/metabolism
- Lymphocytes/ultrastructure
- Lymphocytes/virology
- Membrane Proteins/biosynthesis
- Membrane Proteins/immunology
- Models, Immunological
- Myosin-Light-Chain Kinase/immunology
- Myosin-Light-Chain Kinase/metabolism
- Neurodegenerative Diseases/enzymology
- Neurodegenerative Diseases/immunology
- Neurodegenerative Diseases/pathology
- Neurodegenerative Diseases/virology
- Paraparesis, Tropical Spastic/enzymology
- Paraparesis, Tropical Spastic/immunology
- Paraparesis, Tropical Spastic/pathology
- Paraparesis, Tropical Spastic/virology
- Phosphoproteins/biosynthesis
- Phosphoproteins/immunology
- Spinal Cord/enzymology
- Spinal Cord/immunology
- Spinal Cord/ultrastructure
- Spinal Cord/virology
- Tight Junctions/immunology
- Tight Junctions/metabolism
- Tight Junctions/ultrastructure
- Tumor Necrosis Factor-alpha/immunology
- Tumor Necrosis Factor-alpha/metabolism
- Zonula Occludens-1 Protein
Collapse
Affiliation(s)
- Philippe Vicente Afonso
- Unité d'Epidémiologie et Physiopathologie des Virus Oncogènes, Département de Virologie and Centre National de la Recherche Scientifique Unité de Recherche Associée 3015, Institut Pasteur, Paris, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Wisner DM, Harris LR, Green CL, Poritz LS. Opposing regulation of the tight junction protein claudin-2 by interferon-gamma and interleukin-4. J Surg Res 2007; 144:1-7. [PMID: 17640674 DOI: 10.1016/j.jss.2007.03.059] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2006] [Revised: 02/08/2007] [Accepted: 03/15/2007] [Indexed: 02/06/2023]
Abstract
BACKGROUND The claudins are tight junction (TJ) proteins. Claudin-2 has been found to negatively affect the TJ, causing a decrease in transepithelial resistance. Patients with inflammatory bowel disease have altered intestinal permeability, suggesting a TJ disruption. Interferon-gamma (IFNgamma) and interleukin-4 (IL-4) negatively regulate each other and may have opposing roles in inflammatory bowel disease. HYPOTHESIS IFNgamma and IL-4 will have opposing effects on the expression of claudin-2. METHODS Confluent T84 monolayers were apically incubated with IFNgamma or IL-4. The monolayers were immunofluorescently stained or lysed for Western blot with anti-claudin-2 or -4. Additional monolayers were grown on transwell plates, treated with IFNgamma or IL-4, measured for changes in transepithelial resistance, and assayed for changes in permeability using FITC-dextran-4000. Statistics were calculated by analysis of variance. RESULTS Addition of IFNgamma to T84 monolayers resulted in decreased claudin-2 and addition of IL-4 resulted in increased claudin-2 by Western blot. By immunofluorescence, there was a loss of claudin-2 from the membrane in cells treated with IFNgamma. Transepithelial resistance across T84 monolayers increased with IFNgamma and decreased with IL-4. T84 monolayer permeability increased with IL-4 but not with IFNgamma. CONCLUSIONS Incubation of T84 cells with IL-4 leads to increased claudin-2 with a corresponding decrease in transepithelial resistance and increase in permeability. Incubation of T84 cells with IFNgamma leads to decreased claudin-2 and increased transepithelial resistance. These cytokines have opposite effects on the expression of claudin-2 and the physiology of the TJ.
Collapse
Affiliation(s)
- Douglas M Wisner
- Department of Surgery, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania 17033, USA
| | | | | | | |
Collapse
|
48
|
Abstract
The epithelium of the gastrointestinal tract is the interface between luminal contents and the mucosal immune system. It must function as a selective barrier to limit penetration of antigens yet keep the mucosal immune system "informed" for the purpose of generating oral tolerance responses to food antigens or commensal organisms and host defense responses against pathogens. Alterations in epithelial barrier function have been proposed to play a significant role in gastrointestinal disease. In this review, we will discuss mechanisms of regulation of epithelial barrier function, and we will focus on the emerging understanding of how secreted immunoglobulins play a role in antigen-specific antigen sampling across the gastrointestinal epithelium.
Collapse
Affiliation(s)
- M Cecilia Berin
- Department of Pediatrics, Jaffe Food Allergy Institute, Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, NY 10029, USA.
| | | | | |
Collapse
|
49
|
Abstract
A critical function of the intestinal mucosa is to form a barrier that separates luminal contents from the underlying interstitium. This intestinal barrier is primarily regulated by the apical junctional complex (AJC) consisting of tight junctions (TJs) and adherens junctions (AJs) and is compromised in a number of intestinal diseases, including inflammatory bowel disease (IBD). In vitro studies have demonstrated that proinflammatory cytokines, such as interferon-gamma (IFN-gamma) and tumor necrosis factor-alpha (TNF-alpha), that are increased in the intestinal mucosa of patients with IBD can induce a leaky mucosal barrier. There is a growing evidence that the increased permeability and altered AJC structure observed in IBD are mediated by internalization of junctional proteins. This review summarizes barrier defects observed in IBD and addresses mechanisms by which proinflammatory cytokines, such as IFN-gamma and TNF-alpha, modulate AJC structure and epithelial barrier function.
Collapse
Affiliation(s)
- Matthias Bruewer
- Department of General Surgery, University of Muenster, Muenster 48149, Germany
| | | | | |
Collapse
|
50
|
Shen L, Turner JR. Role of epithelial cells in initiation and propagation of intestinal inflammation. Eliminating the static: tight junction dynamics exposed. Am J Physiol Gastrointest Liver Physiol 2006; 290:G577-82. [PMID: 16537969 DOI: 10.1152/ajpgi.00439.2005] [Citation(s) in RCA: 128] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Like all mucosal surfaces, the intestine forms a barrier that separates the external environment, i.e., the gut lumen, from the protected internal milieu. The intestinal barrier is formed by the epithelial cells that line the luminal surface. Plasma membranes of these cells prevent free passage of hydrophilic molecules across this barrier but do not seal the space between cells. This function is provided by the tight junction. Each cell is encircled at the apicolateral boundary by the tight junction, which seals the paracellular space. The tight junction does not form a completely impermeant seal, however, because that would prevent paracellular absorption of essential nutrients and ions; intestinal tight junctions are "leaky" and allow solutes to be transported paracellularly according to size and charge. Abundant data are available to demonstrate that barrier properties of tight junctions can be modulated in response to physiological, pharmacological, and pathophysiological stimuli, but the structural modifications responsible for these responses are poorly defined. Recent advances in understanding the role of tight junction dynamics in response to such stimuli are the focus of this review.
Collapse
Affiliation(s)
- Le Shen
- Department of Pathology, The University of Chicago, Illnois, USA
| | | |
Collapse
|