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Jia X, Zhu Z, Miao J, Zhang L, Li X, Bao Y, Jiang M. Serum Syndecan-1 levels in patients with immunoglobulin A vasculitis in children. J Pediatr (Rio J) 2022; 98:526-532. [PMID: 35240047 PMCID: PMC9510791 DOI: 10.1016/j.jped.2022.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/12/2022] [Accepted: 01/12/2022] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE The aim of this study was to evaluate the serum Syndecan-1 (SDC-1) levels in patients with immunoglobulin-A vasculitis (IgAV) in children and its relation with gastrointestinal involvements. METHODS Sixty-eight children with IgAV and 48 healthy children were enrolled in this cross-sectional study. Clinical and related laboratory data were collected from a computerized hospital database. Serum SDC-1 was collected on admission prior to treatment. RESULTS Forty-eight patients fully met the IgAV diagnostic criteria at admission (IgAV group), 20 patients with rash only and diagnosed IgAV during hospitalization (Purpura group). In IgAV group, 30 patients with gastrointestinal involvements (IgAV-GI group) and 18 patients without gastrointestinal involvements (IgAV-NGI group). SDC-1 serum levels were significantly higher in the IgAV group (86.37 ng/mL (IQR 59.16-117.14 ng/mL)) than in the controls (20.37 ng/mL (IQR 15.52-26.45 ng/mL)) and the Purpura group (32.66 ng/mL (IQR 14.87-49.89 ng/mL)). Additionally, SDC-1 (OR = 1.08) was independently associated with IgAV with a cut-off value (sensitivity and specificity) of 66.55 ng/mL (68.8%, 95.0%), and the area under the curve was 0.908. The serum SDC-1 levels of the IgAV-GI group (106.92 ± 50.12 ng/mL) were significantly higher than those in the IgAV-NGI group (67.52 ± 17.59 ng/mL). Logistic regression analysis showed that SDC-1 (OR = 1.03) was independently associated with IgAV-GI with a cut-off value of 89.39 ng/mL. CONCLUSIONS SDC-1 serum levels may mirror vascular endothelium injury and mucosal damage in IgAV. Its applicability as a surrogate biomarker in IgAV remains to be determined.
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Affiliation(s)
- Xinyi Jia
- Gastrointestinal Lab, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, Zhejiang, China; Jinhua Hospital, Zhejiang University and Jinhua Municipal Central Hospital, Jinhua, China; Endoscopy center and Department of Gastroenterology, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, Zhejiang, China
| | - Zhenya Zhu
- Gastrointestinal Lab, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, Zhejiang, China
| | - Jing Miao
- Gastrointestinal Lab, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, Zhejiang, China; Jinhua Hospital, Zhejiang University and Jinhua Municipal Central Hospital, Jinhua, China
| | - Linqian Zhang
- Jinhua Hospital, Zhejiang University and Jinhua Municipal Central Hospital, Jinhua, China
| | - Xiaobing Li
- Jinhua Hospital, Zhejiang University and Jinhua Municipal Central Hospital, Jinhua, China
| | - Yunguang Bao
- Jinhua Hospital, Zhejiang University and Jinhua Municipal Central Hospital, Jinhua, China
| | - Mizu Jiang
- Gastrointestinal Lab, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, Zhejiang, China; Endoscopy center and Department of Gastroenterology, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, Zhejiang, China.
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Rawat PS, Seyed Hameed AS, Meng X, Liu W. Utilization of glycosaminoglycans by the human gut microbiota: participating bacteria and their enzymatic machineries. Gut Microbes 2022; 14:2068367. [PMID: 35482895 PMCID: PMC9067506 DOI: 10.1080/19490976.2022.2068367] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Glycosaminoglycans (GAGs) are consistently present in the human colon in free forms and as part of proteoglycans. Their utilization is critical for the colonization and proliferation of gut bacteria and also the health of hosts. Hence, it is essential to determine the GAG-degrading members of the gut bacteria and their enzymatic machinery for GAG depolymerization. In this review, we have summarized the reported GAG utilizers from Bacteroides and presented their polysaccharide utilization loci (PUL) and related enzymatic machineries for the degradation of chondroitin and heparin/heparan sulfate. Although similar comprehensive knowledge of GAG degradation is not available for other gut phyla, we have specified recently isolated GAG degraders from gut Firmicutes and Proteobacteria, and analyzed their genomes for the presence of putative GAG PULs. Deciphering the precise GAG utilization mechanism for various phyla will augment our understanding of their effects on human health.
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Affiliation(s)
- Parkash Singh Rawat
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao266237, P. R. China
| | - Ahkam Saddam Seyed Hameed
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao266237, P. R. China
| | - Xiangfeng Meng
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao266237, P. R. China,CONTACT Xiangfeng Meng State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao266237, P. R. China
| | - Weifeng Liu
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao266237, P. R. China
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Hwang J, Park E, Choi YW, Min S, Oh ES. Emerging role of syndecans in maintaining homeostasis of colon epithelium during inflammation. Am J Physiol Cell Physiol 2022; 322:C960-C966. [PMID: 35385327 DOI: 10.1152/ajpcell.00048.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The syndecans are a family of transmembrane proteoglycans that are widespread in mammalian tissues. Located at the cell surface membrane, they contribute to modulating the composition of the extracellular matrix via glycosaminoglycan chains (GAGs) attached to their extracellular domains. Syndecans can interact with a variety of extracellular ligands through their core proteins and GAGs, and may also transmit signals through their transmembrane domain to regulate intracellular functions. These properties enable syndecan to modulate glycocalyx formation, epithelial cell-to-cell connections for cell barrier formation, and epithelial cell-lamina propria interactions in the colon epithelium, all of which are crucial for the homeostasis of this tissue. Inflammation induces structural alterations of the colon epithelium, and accumulating evidence suggests that syndecan expression might play important regulatory functions during inflammation. This review summarizes the possible roles of syndecans in maintaining tissue homeostasis in the colon epithelium, especially under inflammation.
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Affiliation(s)
- Jisun Hwang
- Department of Life Sciences, Ewha Womans University, Seoul, Korea (South), Republic of
| | - Eunhye Park
- Department of Life Sciences, Ewha Womans University, Seoul, Korea (South), Republic of
| | - Yeong-Woo Choi
- Department of Life Sciences, Ewha Womans University, Seoul, Korea (South), Republic of
| | - Shinhye Min
- Department of Life Sciences, Ewha Womans University, Seoul, Korea (South), Republic of
| | - Eok-Soo Oh
- Department of Life Sciences, Ewha Womans University, Seoul, Korea (South), Republic of
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Hong H, Song HK, Jang B, Park E, Han DS, Kim SE, Oh ES. Colocalization with MMP-7 in the Distal Colon is Crucial for Syndecan-2 Shedding in Dextran Sulfate Sodium-Induced Colitis Mice. J Inflamm Res 2021; 14:4987-5000. [PMID: 34616168 PMCID: PMC8488046 DOI: 10.2147/jir.s329234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/21/2021] [Indexed: 12/19/2022] Open
Abstract
Introduction Syndecan-2 expression is elevated during chronic inflammation and cancer development, and its shedding is observed in cancer patients. However, it remained unknown whether inflammation triggers syndecan-2 shedding. Methods The colitis model was produced in C57BL/6 mice by oral administration of 2–3% dextran sulfate sodium (DSS) in the drinking water. Syndecan-2 and MMP-7 expression levels in tissues and cells were detected by real-time PCR, Western blotting, and immunohistochemistry. Shed syndecan-2 levels were detected by slot blotting. For tissue culture, colon tissues were divided into proximal, transverse, and distal parts, and incubated in culture media. Results In C57BL/6 mice with DSS-induced colitis, syndecan-2 shedding began to increase after week 12 of chronic inflammation and continued to increase at week 15. The level of shed syndecan-2 correlated with the colocalization of syndecan-2 and MMP-7 in distal colon tissues. The mRNA expression of IL-6 was increased specifically in trans-distal colon tissues from weeks 9 to 15. IL-6 induced syndecan-2 expression and shedding and MMP-7 expression in ex vivo-cultured distal colon tissues and adenoma cell lines derived from the distal colon. IL-6 treatment induced STAT3 phosphorylation and MMP-7 expression in DLD-1 cells. The application of MMP-7 to ex vivo-cultured colon tissues increased the shedding of syndecan-2 to the culture medium. Conclusion Our findings suggest that chronic inflammation induces syndecan-2 shedding via the site-specific colocalization of syndecan-2 with MMP-7 in the distal colon.
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Affiliation(s)
- Heejeong Hong
- Department of Life Sciences, Ewha Womans University, Seoul, South Korea
| | - Hyun-Kuk Song
- Department of Life Sciences, Ewha Womans University, Seoul, South Korea
| | - Bohee Jang
- Department of Life Sciences, Ewha Womans University, Seoul, South Korea
| | - Eunhye Park
- Department of Life Sciences, Ewha Womans University, Seoul, South Korea
| | - Dong Soo Han
- Department of Internal Medicine, Hanyang University College of Medicine, Guri, South Korea
| | - Seong-Eun Kim
- Department of Internal Medicine, Ewha Womans University School of Medicine, Ewha Medical Research Institute, Seoul, South Korea
| | - Eok-Soo Oh
- Department of Life Sciences, Ewha Womans University, Seoul, South Korea
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Mortensen JH, Lindholm M, Langholm LL, Kjeldsen J, Bay-Jensen AC, Karsdal MA, Manon-Jensen T. The intestinal tissue homeostasis - the role of extracellular matrix remodeling in inflammatory bowel disease. Expert Rev Gastroenterol Hepatol 2019; 13:977-993. [PMID: 31587588 DOI: 10.1080/17474124.2019.1673729] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Introduction: Extracellular matrix (ECM) remodeling of the intestinal tissue is important in inflammatory bowel disease (IBD) due to the extensive mucosal remodeling. There are still gaps in our knowledge as to how ECM remodeling is related to intestinal epithelium homeostasis and healing of the intestinal mucosa.Areas covered: The aim of this review is to highlight the importance of the ECM in relation to the pathogenesis of IBD, while addressing basement membrane and interstitial matrix remodeling, and the processes of wound healing of the intestinal tissue in IBD.Expert opinion: In IBD, basement membrane remodeling may reflect the integrity of the intestinal epithelial-cell homeostasis. The interstitial matrix remodeling is associated with deep inflammation such as the transmural inflammation as seen in fistulas and intestinal fibrosis leading to fibrostenotic strictures, in patients with CD. The interplay between wound healing processes and ECM remodeling also affects the tissue homeostasis in IBD. The interstitial matrix, produced by fibroblasts, holds a very different biology as compared to the epithelial basement membrane in IBD. In combination with integration of wound healing, quantifying the interplay between damage and repair to these sub compartments may provide essential information in IBD patient profiling, mucosal healing and disease management.
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Affiliation(s)
- J H Mortensen
- Nordic Bioscience A/S, Biomarkers & Research, Herlev, Denmark
| | - M Lindholm
- Nordic Bioscience A/S, Biomarkers & Research, Herlev, Denmark.,Department of Medical Gastroenterology, Odense University hospital, Odense, Denmark
| | - L L Langholm
- Nordic Bioscience A/S, Biomarkers & Research, Herlev, Denmark
| | - J Kjeldsen
- Department of Medical Gastroenterology, Odense University hospital, Odense, Denmark
| | - A C Bay-Jensen
- Nordic Bioscience A/S, Biomarkers & Research, Herlev, Denmark
| | - M A Karsdal
- Nordic Bioscience A/S, Biomarkers & Research, Herlev, Denmark
| | - T Manon-Jensen
- Nordic Bioscience A/S, Biomarkers & Research, Herlev, Denmark
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Soluble Syndecan-1: A Novel Biomarker of Small Bowel Mucosal Damage in Children with Celiac Disease. Dig Dis Sci 2017; 62:755-760. [PMID: 28025744 DOI: 10.1007/s10620-016-4415-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 12/06/2016] [Indexed: 12/12/2022]
Abstract
BACKGROUND Syndecan-1 (SDC1) is essential for maintaining normal epithelial barrier. Shedding of SDC1 ectodomain, reflected by serum soluble syndecan-1 (SSDC1) levels, is regulated by inflammation. Increased intestinal permeability plays a central role in celiac disease (CD). The association between SSDC1 levels and mucosal damage in CD has not been evaluated. AIMS To evaluate serum SSDC1 levels in children with CD and to determine its relationship with histological grading classified by modified Marsh criteria. METHODS This is a cross-sectional, pilot study, in which serum SSDC1 was analyzed by ELISA in a cohort of 49 untreated children with CD and 15 children with nonspecific abdominal pain (AP). CD was diagnosed based on positive celiac serology and small intestinal biopsy. SSDC1 levels at the time of biopsy were correlated with Marsh grading. Controls were defined by AP, negative celiac serology, normal upper endoscopy, and small intestinal biopsies. RESULTS SSDC1 levels were significantly higher in CD patients compared to AP controls (116.2 ± 161 vs. 41.3 ± 17.5 ng/ml, respectively, p < 0.01). SSDC1 levels were significantly higher in patients with Marsh 3c lesion compared to AP controls (170.6 ± 201 vs. 41.3 ± 17.5 ng/ml, respectively, p < 0.05). SSDC1 concentrations displayed a significant correlation with mucosal damage defined by Marsh (r = 0.39, p < 0.05). CONCLUSION This is the first study demonstrating elevated levels of serum SSDC1 in children with CD. Our results suggest that SSDC1 is a potentially novel marker of intestinal mucosal damage in patients with CD. Its applicability as a surrogate biomarker in CD remains to be determined.
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Zhang Y, Wang Z, Liu J, Zhang S, Fei J, Li J, Zhang T, Wang J, Park PW, Chen Y. Cell surface-anchored syndecan-1 ameliorates intestinal inflammation and neutrophil transmigration in ulcerative colitis. J Cell Mol Med 2016; 21:13-25. [PMID: 27558380 PMCID: PMC5192823 DOI: 10.1111/jcmm.12934] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 06/06/2016] [Indexed: 12/13/2022] Open
Abstract
Syndecan‐1 (SDC1), with a variable ectodomain carrying heparan sulphate (HS) chains between different Syndecans, participates in many steps of inflammatory responses. In the process of proteolysis, the HS chains of the complete extracellular domain can be shed from the cell surface, by which they can mediate most of SDC1's function. However, the exact impact on SDC1 which anchored on the cell surface has not been clearly reported. In our study, we established the models by transfection with the cleavable resistant SDC1 mutant plasmid, in which SDC1 shedding can be suppressed during stimulation. Role of membrane SDC1 in inflammatory pathway, pro‐inflammatory cytokine secretion as well as neutrophil transmigration, and how suppressing its shedding will benefit colitis were further investigated. We found that the patients suffered ulcerative colitis had high serum SDC1 levels,presented with increased levels of P65, tumour necrosis factor alpha (TNF‐α) and IL‐1β and higher circulating neutrophils. NF‐κB pathway was activated, and secretion of TNF‐α, interleukin‐1beta (IL‐1β), IL‐6 and IL‐8 were increased upon lipopolysaccharide stimuli in intestinal epithelial cells. Syndecan‐1, via its anchored ectodomain, significantly lessened these up‐regulation extents. It also functioned in inhibiting transmigration of neutrophils by decreasing CXCL‐1 secretion. Moreover, SDC1 ameliorated colitis activity and improved histological disturbances of colon in mice. Taken together, we conclude that suppression of SDC1 shedding from intestinal epithelial cells relieves severity of intestinal inflammation and neutrophil transmigration by inactivating key inflammatory regulators NF‐κB, and down‐regulating pro‐inflammatory cytokine expressions. These indicated that compenstion and shedding suppression of cytomembrane SDC1 might be the optional therapy for intestinal inflammation.
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Affiliation(s)
- Yan Zhang
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Zhongqiu Wang
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.,Department of Radiation Oncology and Cyberknife Center, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Tianjin, China
| | - Jun Liu
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.,Department of Gastroenterology, Liuzhou Worker's Hospital, Liuzhou, China
| | - Shaoheng Zhang
- Department of Gastroenterology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Jiaxi Fei
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Jing Li
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Ting Zhang
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Jide Wang
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Pyong W Park
- Department of Medicine, Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Ye Chen
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
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Abstract
We have shown in a rodent model of hemorrhagic shock (HS) that fresh frozen plasma (FFP) reduces lung inflammation and injury that are correlated with restitution of syndecan-1. As the gut is believed to contribute to distant organ injury and inflammation after shock, the current study sought to determine if the protective effects of plasma would extend to the gut and to elucidate the contribution of syndecan-1 to this protective effect. We also examined the potential role of TNFα, and a disintegrin and metalloproteinase (ADAM)-17, both intestinal sheddases of syndecan-1. Wild-type (WT) and syndecan-1 (KO) mice were subjected to HS followed by resuscitation with lactated Ringer's (LR) or FFP and compared with shock alone and shams. Small bowel and blood were obtained after 3 h for analysis of mucosal injury and inflammation and TNFα and ADAM-17 protein expression and activity. After HS, gut injury and inflammation were significantly increased compared with shams. Resuscitation with LR decreased both injury and inflammation that were further lessened by FFP. KO mice displayed worsened gut injury and inflammation after HS compared with WT mice, and LR and FFP equivalently inhibited injury and inflammation. Both systemic and intestinal TNFα and ADAM-17 followed similar trends, with increases after HS, reduction by LR, and a further decrease by FFP in WT but not KO mice. In conclusion, FFP decreased gut injury and inflammation after hemorrhagic shock, an effect that was abrogated in syndecan-1 mice. Plasma also decreased TNFα and ADAM-17, representing a potential mechanistic link to its protection via syndecan-1.
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Lean QY, Gueven N, Eri RD, Bhatia R, Sohal SS, Stewart N, Peterson GM, Patel RP. Heparins in ulcerative colitis: proposed mechanisms of action and potential reasons for inconsistent clinical outcomes. Expert Rev Clin Pharmacol 2015; 8:795-811. [PMID: 26308504 DOI: 10.1586/17512433.2015.1082425] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Current drug therapies for ulcerative colitis (UC) are not completely effective in managing moderate-to-severe UC and approximately 20% of patients with severe UC require surgical interventions. Heparins, polydisperse mixtures of non-anticoagulant and anticoagulant oligosaccharides, are widely used as anticoagulants. However, heparins are also reported to have anti-inflammatory properties. Unfractionated heparin was initially used in patients with UC for the treatment of rectal microthrombi. Surprisingly, it was found to be effective in reducing UC-associated symptoms. Since then, several pre-clinical and clinical studies have reported promising outcomes of heparins in UC. In contrast, some controlled clinical trials demonstrated no or only limited benefits, thus the potential of heparins for the treatment of UC remains uncertain. This review discusses potential mechanisms of action of heparins, as well as proposed reasons for their contradictory clinical effectiveness in the treatment of UC.
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Affiliation(s)
- Qi Ying Lean
- a 1 Division of Pharmacy, School of Medicine, Faculty of Health, University of Tasmania , Hobart, Tasmania, Australia.,b 2 Faculty of Pharmacy, University of Technology MARA, Puncak Alam , Selangor, Malaysia
| | - Nuri Gueven
- a 1 Division of Pharmacy, School of Medicine, Faculty of Health, University of Tasmania , Hobart, Tasmania, Australia
| | - Rajaraman D Eri
- c 3 School of Health Sciences, Faculty of Health, University of Tasmania, Launceston , Tasmania, Australia
| | - Rajesh Bhatia
- d 4 Royal Hobart Hospital , Hobart, Tasmania, Australia
| | - Sukhwinder Singh Sohal
- c 3 School of Health Sciences, Faculty of Health, University of Tasmania, Launceston , Tasmania, Australia.,e 5 Breathe Well Centre of Research Excellence for Chronic Respiratory Disease and Lung Ageing, School of Medicine, Faculty of Health, University of Tasmania , Hobart, Tasmania, Australia
| | - Niall Stewart
- a 1 Division of Pharmacy, School of Medicine, Faculty of Health, University of Tasmania , Hobart, Tasmania, Australia
| | - Gregory M Peterson
- a 1 Division of Pharmacy, School of Medicine, Faculty of Health, University of Tasmania , Hobart, Tasmania, Australia.,e 5 Breathe Well Centre of Research Excellence for Chronic Respiratory Disease and Lung Ageing, School of Medicine, Faculty of Health, University of Tasmania , Hobart, Tasmania, Australia.,f 6 Health Services Innovation Tasmania, School of Medicine, Faculty of Health, University of Tasmania , Hobart, Tasmania, Australia
| | - Rahul P Patel
- a 1 Division of Pharmacy, School of Medicine, Faculty of Health, University of Tasmania , Hobart, Tasmania, Australia
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Syndecan-1 Acts in Synergy with Tight Junction Through Stat3 Signaling to Maintain Intestinal Mucosal Barrier and Prevent Bacterial Translocation. Inflamm Bowel Dis 2015; 21:1894-907. [PMID: 25970544 DOI: 10.1097/mib.0000000000000421] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Intestinal epithelial tight junction (TJ) is the principal determinant of mucosal permeability, defects of which have been correlated to inflammatory bowel disease. In this study, we investigated whether syndecan-1 (Sdc1), the predominant cell surface heparan sulfate proteoglycan, affects TJ proteins to protect intestinal barrier function. METHODS The role of Sdc1 in barrier function was examined in cultured colonic epithelial cells and dextran sodium sulfate-induced colitis mouse model. Barrier function was determined by transepithelial electrical resistance, bacterial translocation, and FITC-dextran flux. Canonical TJ proteins ZO-1 and occludin were measured by Western blot and immunofluoresence. Role of the Stat3 pathway was detected by Western blot and chromatin immunoprecipitation. RESULTS Overexpressed Sdc1 in Caco-2 cells attenuated transepithelial electrical resistance reduction, prevented bacterial translocation, and repressed FITC-dextran flux, whereas Sdc1 knockdown in HT29 cells resulted in a greater loss of barrier function. Supplementation of exogenous Sdc1 in colitis mice ameliorated the activity of colitis and barrier defect. Mechanistically, Sdc1 significantly modulated expressions of ZO-1 and occludin by activating Stat3, which directly bound to the promoter regions of ZO-1 and occludin. Furthermore, ZO-1 and occludin were found to bind to each other, and their repression could induce Sdc1 upregulation. CONCLUSIONS Sdc1 plays an important role in protecting the intestinal barrier function and preventing bacterial translocation, in synergy with TJ through Stat3 signaling in an Sdc1/Stat3/ZO-1 and occludin feedback loop. Sdc1 participates in the mechanism that is related to intestinal barrier function and colitis and represents a therapeutic target for novel anti-inflammatory bowel disease strategies.
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Soluble Syndecan-1 Levels Are Elevated in Patients with Inflammatory Bowel Disease. Dig Dis Sci 2015; 60:2419-26. [PMID: 25702042 DOI: 10.1007/s10620-015-3589-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Accepted: 02/12/2015] [Indexed: 12/19/2022]
Abstract
BACKGROUND Syndecan-1 plays a central role in maintaining normal intestinal barrier function. Shedding of syndecan-1, reflected by soluble syndecan-1 serum concentrations, is highly regulated by inflammation. AIM To determine soluble syndecan-1 levels in inflammatory bowel disease patients and its relationship with other inflammatory markers, disease activity, and medical treatment. METHODS Cross-sectional, pilot study in which serum concentrations of soluble syndecan-1 were analyzed by ELISA in a cohort of 41 inflammatory bowel disease patients (22 Crohn's disease, 19 ulcerative colitis) and 16 healthy controls. Disease activity was estimated by the Crohn's disease activity index, partial Mayo score, and C-reactive protein. RESULTS Soluble syndecan-1 levels were significantly higher in inflammatory bowel disease patients compared to healthy controls (29.5 ± 13.4 vs. 21.1 ± 10.4 ng/ml, respectively, P = 0.03). Soluble syndecan-1 displayed a reliable ability to discriminate inflammatory bowel disease patients from healthy controls with a sensitivity of 95 %, specificity of 50 %, and positive predictive value of 83 %. Patients treated with anti-inflammatory medications demonstrated significantly lower soluble syndecan-1 levels compared to untreated patients (26.45 ± 9.75 vs. 38 ± 18.43 ng/ml, respectively, P = 0.008). CONCLUSIONS Our results suggest that soluble syndecan-1 is potentially a novel diagnostic marker in the management of inflammatory bowel disease patients. Its applicability as a surrogate, prognostic biomarker remains to be determined.
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Serum Syndecan-1 Levels and Its Relationship to Disease Activity in Patients with Crohn's Disease. Gastroenterol Res Pract 2015; 2015:850351. [PMID: 26294905 PMCID: PMC4532935 DOI: 10.1155/2015/850351] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 06/17/2015] [Accepted: 07/14/2015] [Indexed: 01/04/2023] Open
Abstract
Background. Syndecan-1 (SDC-1), a member of the family of heparan sulfate proteoglycans, plays an important role in the resolution of inflammation. This study aimed to investigate the relationship between SDC-1 and disease activity in Crohn's disease (CD). Methods. Serum samples of 54 patients with CD and 30 healthy controls were obtained. First, SDC-1 levels of the CD patients were compared to the control group. Subsequently, SDC-1 levels were analyzed in patients with CD in active and remission periods. Finally, SDC-1 efficacy in predicting disease activity was evaluated by performing correlation analysis between SDC-1 and C-reactive protein (CRP) and Crohn's disease activity index (CDAI). Results. SDC-1 level was higher in the CD group (61.9 ± 42.6 ng/mL) compared with the control group (34.1 ± 8.0 ng/mL) (p = 0.03). SDC-1 levels were higher in active CD patients (97.1 ± 40.3 ng/mL) compared with those in remission (33.7 ± 13.5 ng/mL) (p < 0.001). A significant positive correlation was found between SDC-1 and CRP (r = 0.687, p < 0.001) and between SDC-1 and CDAI (r = 0.747, p < 0.001). Conclusion. Serum levels of SDC-1 are higher in CD compared to the normal population and can be an effective marker of disease severity.
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Lean QY, Eri RD, Randall-Demllo S, Sohal SS, Stewart N, Peterson GM, Gueven N, Patel RP. Orally Administered Enoxaparin Ameliorates Acute Colitis by Reducing Macrophage-Associated Inflammatory Responses. PLoS One 2015; 10:e0134259. [PMID: 26218284 PMCID: PMC4517792 DOI: 10.1371/journal.pone.0134259] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 06/25/2015] [Indexed: 02/07/2023] Open
Abstract
Inflammatory bowel diseases, such as ulcerative colitis, cause significant morbidity and decreased quality of life. The currently available treatments are not effective in all patients, can be expensive and have potential to cause severe side effects. This prompts the need for new treatment modalities. Enoxaparin, a widely used antithrombotic agent, is reported to possess anti-inflammatory properties and therefore we evaluated its therapeutic potential in a mouse model of colitis. Acute colitis was induced in male C57BL/6 mice by administration of dextran sulfate sodium (DSS). Mice were treated once daily with enoxaparin via oral or intraperitoneal administration and monitored for colitis activities. On termination (day 8), colons were collected for macroscopic evaluation and cytokine measurement, and processed for histology and immunohistochemistry. Oral but not intraperitoneal administration of enoxaparin significantly ameliorated DSS-induced colitis. Oral enoxaparin-treated mice retained their body weight and displayed less diarrhea and fecal blood loss compared to the untreated colitis group. Colon weight in enoxaparin-treated mice was significantly lower, indicating reduced inflammation and edema. Histological examination of untreated colitis mice showed a massive loss of crypt architecture and goblet cells, infiltration of immune cells and the presence of edema, while all aspects of this pathology were alleviated by oral enoxaparin. Reduced number of macrophages in the colon of oral enoxaparin-treated mice was accompanied by decreased levels of pro-inflammatory cytokines. Oral enoxaparin significantly reduces the inflammatory pathology associated with DSS-induced colitis in mice and could therefore represent a novel therapeutic option for the management of ulcerative colitis.
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Affiliation(s)
- Qi Ying Lean
- Pharmacy, School of Medicine, Faculty of Health, University of Tasmania, Hobart, Tasmania, Australia
- Faculty of Pharmacy, University of Technology MARA, Puncak Alam, Selangor, Malaysia
| | - Rajaraman D. Eri
- School of Health Sciences, Faculty of Health, University of Tasmania, Launceston, Tasmania, Australia
| | - Sarron Randall-Demllo
- School of Health Sciences, Faculty of Health, University of Tasmania, Launceston, Tasmania, Australia
| | - Sukhwinder Singh Sohal
- School of Health Sciences, Faculty of Health, University of Tasmania, Launceston, Tasmania, Australia
- Breathe Well Centre of Research Excellence for Chronic Respiratory Disease and Lung Ageing, School of Medicine, Faculty of Health, University of Tasmania, Hobart, Tasmania, Australia
| | - Niall Stewart
- Pharmacy, School of Medicine, Faculty of Health, University of Tasmania, Hobart, Tasmania, Australia
| | - Gregory M. Peterson
- Pharmacy, School of Medicine, Faculty of Health, University of Tasmania, Hobart, Tasmania, Australia
- Breathe Well Centre of Research Excellence for Chronic Respiratory Disease and Lung Ageing, School of Medicine, Faculty of Health, University of Tasmania, Hobart, Tasmania, Australia
- Health Services Innovation Tasmania, School of Medicine, Faculty of Health, University of Tasmania, Hobart, Tasmania, Australia
| | - Nuri Gueven
- Pharmacy, School of Medicine, Faculty of Health, University of Tasmania, Hobart, Tasmania, Australia
| | - Rahul P. Patel
- Pharmacy, School of Medicine, Faculty of Health, University of Tasmania, Hobart, Tasmania, Australia
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Wang X, Zuo D, Chen Y, Li W, Liu R, He Y, Ren L, Zhou L, Deng T, Wang X, Ying G, Ba Y. Shed Syndecan-1 is involved in chemotherapy resistance via the EGFR pathway in colorectal cancer. Br J Cancer 2014; 111:1965-76. [PMID: 25321193 PMCID: PMC4229635 DOI: 10.1038/bjc.2014.493] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 07/30/2014] [Accepted: 08/13/2014] [Indexed: 01/03/2023] Open
Abstract
Background: Syndecan-1 (Sdc-1) shedding induced by matrix metalloproteinase-7 (MMP-7) and additional proteases has an important role in cancer development. However, the impact of Sdc-1 shedding on chemotherapeutic resistance has not been reported. Methods: We examined Sdc-1 shedding in colorectal cancer by enzyme-linked immunosorbent assay (ELISA), Dot blot, reverse transcription-PCR (RT-PCR), immunohistochemistry and so on, its impact on chemotherapeutic sensitivity by collagen gel droplet embedded culture-drug sensitivity test (CD-DST) and MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide), and potential mechanisms of action by Dot blot, western blot and immunofluorescence. Results: Sdc-1 shedding was increased in colorectal cancer patients, Sdc-1 serum levels in postoperative patients were lower than in preoperative patients, but still higher than those observed in healthy adults. Patients with high preoperative Sdc-1 serum levels were less responsive to 5-Fluorouracil, Oxaliplatin, Irintecan, Cisplatin or Paclitaxel chemotherapy. Moreover, the disease-free survival of patients with high preoperative Sdc-1 serum levels was significantly poorer. The possible mechanism of chemotherapy resistance in colorectal cancer can be attributed to Sdc-1 shedding, which enhances EGFR phosphorylation and downstream signalling. Conclusions: Shed Sdc-1 is involved in chemotherapy resistance via the EGFR pathway in colorectal cancer, and Sdc-1 serum levels could be a new prognostic marker in colorectal cancer.
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Affiliation(s)
- X Wang
- Key Laboratory of Cancer Prevention and Therapy, Department of Gastrointestinal Oncology, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - D Zuo
- Key Laboratory of Cancer Prevention and Therapy, Department of Clinical Laboratory, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Y Chen
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Digestive Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - W Li
- Department of Cardiovascular Medicine, Tianjin Chest Hospital, Tianjin 300000, China
| | - R Liu
- Key Laboratory of Cancer Prevention and Therapy, Department of Gastrointestinal Oncology, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Y He
- Department of Hepatology and Infectious Disease, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - L Ren
- Key Laboratory of Cancer Prevention and Therapy, Department of Clinical Laboratory, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - L Zhou
- Key Laboratory of Cancer Prevention and Therapy, Department of Gastrointestinal Oncology, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - T Deng
- Key Laboratory of Cancer Prevention and Therapy, Department of Gastrointestinal Oncology, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - X Wang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Digestive Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - G Ying
- Laboratory of Cancer Cell Biology, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Y Ba
- Key Laboratory of Cancer Prevention and Therapy, Department of Gastrointestinal Oncology, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
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Wang XF, Li AM, Li J, Lin SY, Chen CD, Zhou YL, Wang X, Chen CL, Liu SD, Chen Y. Low molecular weight heparin relieves experimental colitis in mice by downregulating IL-1β and inhibiting syndecan-1 shedding in the intestinal mucosa. PLoS One 2013; 8:e66397. [PMID: 23874391 PMCID: PMC3715511 DOI: 10.1371/journal.pone.0066397] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 05/06/2013] [Indexed: 01/26/2023] Open
Abstract
Low molecular weight heparin (LMWH) exhibits anti-inflammatory properties, but its effect on inflammation in colitis remains unclear. This study aimed to evaluate the therapeutic effects of LMWH on dextran sulfate sodium (DSS)-induced colitis in mice, in which acute colitis progresses to chronic colitis, and to explore the potential mechanism involved in this process. C57BL/6 mice were randomly divided into control, DSS, and DSS plus LMWH groups (n = 18). Disease activity was scored by a disease activity index (DAI). Histological changes were evaluated by hematoxylin and eosin (HE) staining. The mRNA levels of syndecan-1, interleukin (IL)-1β, and IL-10 were determined by quantitative reverse transcription polymerase chain reaction. Protein expression of syndecan-1 was detected by immunohistochemistry. The serum syndecan-1 level was examined by a dot immunobinding assay. LMWH ameliorated the disease activity of colitis induced by DSS administration in mice. Colon destruction with the appearance of crypt damage, goblet cell loss, and a larger ulcer was found on day 12 after DSS administration, which was greatly relieved by the treatment of LMWH. LMWH upregulated syndecan-1 expression in the intestinal mucosa and reduced the serum syndecan-1 level on days 12 and 20 after DSS administration (P<0.05 vs. DSS group). In addition, LMWH significantly decreased the expression of both IL-1β and IL-10 mRNA on days 12 and 20 (P<0.05 vs. DSS group). LMWH has therapeutic effects on colitis by downregulating inflammatory cytokines and inhibiting syndecan-1 shedding in the intestinal mucosa.
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Affiliation(s)
- Xian-fei Wang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Gastroenterology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Ai-ming Li
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jing Li
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Shi-yong Lin
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Chu-di Chen
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - You-lian Zhou
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xia Wang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Cun-long Chen
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Si-de Liu
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Ye Chen
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, China
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Syndecan-1 and heparanase: potential markers for activity evaluation and differential diagnosis of Crohn's disease. Inflamm Bowel Dis 2013; 19:1025-33. [PMID: 23511033 DOI: 10.1097/mib.0b013e318280298f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Syndecan-1 (SDC1) and its endo-beta-D-glucuronidase heparanase (HPA) are implicated in the maintenance of intestinal barrier function, but their detailed functions in Crohn's disease (CD) are not fully investigated. The aim of this study was to determine alteration patterns of SDC1 and HPA and their potential roles in evaluating disease activity and differentiating CD from intestinal tuberculosis (ITB). METHODS Tissue and serum specimens were obtained from 89 patients, including 15 patients with functional bowel disorders, 18 active patients with ITB, and 56 patients with CD (remission = 19, active = 37). Basic clinical data were collected and routine blood tests were analyzed. SDC1 and HPA were measured by immunohistochemistry, enzyme-linked immunosorbent assay, reverse transcriptase polymerase chain reaction, and western blot. Colonic epithelial cells were incubated with recombinant HPA, tumor necrosis factor alpha (TNF-α), and mycobacterium tuberculosis culture filtrate protein to detect the alterations of SDC1 and HPA. RESULTS In the CD group, SDC1 was significantly decreased in mucosa and increased in serum, whereas HPA level in both were elevated. Such alterations were associated with clinicopathological features representing disease activity and injury severity and were not available in functional bowel disorder and ITB groups. Recombinant HPA incubation increased soluble SDC1 in culture supernatants (P = 2 × 10(-4)), and low-dose TNF-α effectively enhanced HPA's activity (P = 3 × 10(-6)). Exogenous TNF-α destroyed cellular SDC1 and raised HPA expressions dose dependently, whereas mycobacterium tuberculosis culture filtrate protein showed no effects. CONCLUSIONS Unique alterations of SDC1 and HPA are shown in both patients with CD and in vitro model. The results indicate SDC1 and HPA are potential markers for CD in evaluating its disease activity and differentiating it from ITB.
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Patterson AM, Delday MI, van Kuppevelt TH, Loh G, Blaut M, Haller D, Grant G, Kelly D. Expression of heparan sulfate proteoglycans in murine models of experimental colitis. Inflamm Bowel Dis 2012; 18:1112-26. [PMID: 21987406 DOI: 10.1002/ibd.21879] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2011] [Accepted: 08/08/2011] [Indexed: 12/14/2022]
Abstract
BACKGROUND Heparan sulfate proteoglycans (HSPGs) are considered important in maintaining physiological homeostasis in many systems. Their expression is altered greatly in several pathophysiological conditions. Herein, we assess the expression and cellular localization of HSPGs in two murine models of human inflammatory bowel disease (IBD). METHODS Expression and localization of HSPGs, syndecans, and HS epitopes were examined in the colon of 129SvEv interleukin 10 knockout (IL10(-/-)), C3Bir IL10(-/-), and their genetic control (IL10(+/+)) counterparts (129SvEv; C3H/HeJ). mRNA expression of syndecans and heparan sulfate biosynthesis enzymes were evaluated by real-time polymerase chain reaction (PCR). Localization of HSPGs was determined by immunofluorescence. RESULTS mRNA for all syndecans was detected and expression in colonic tissues altered in IL10(-/-) mice. Syndecan-1 protein was expressed in the intestinal epithelium and on lamina propria cells of IL10(-/-) and control mice but was significantly reduced on the intestinal epithelial cells of IL10(-/-), mice particularly with severe colitis. Syndecan-2 was not detected, whereas syndecan-3 immunoreactivity was localized in the lamina propria but did not differ between control and IL10(-/-) mice. Syndecan-4 was present on epithelial cells of all mice but was significantly reduced in IL10(-/-) mice. Differences in the expression of HS epitopes between control and IL10(-/-) mice were also confirmed. CONCLUSIONS The study has revealed altered expression of syndecan-1 and -4 and HS epitopes in the gut of mice with an IBD-like gut disorder. The IL10(-/-) mouse is a useful model for further study of the functional role of HSPGs in chronic inflammation and in maintaining healthy gut barrier.
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Affiliation(s)
- A M Patterson
- Gut Immunology Group, Gut Health Division, Rowett Institute of Nutrition and Health, University of Aberdeen, Scotland, UK.
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