1
|
Lin X, Zhang J, Chu Y, Nie Q, Zhang J. Berberine prevents NAFLD and HCC by modulating metabolic disorders. Pharmacol Ther 2024; 254:108593. [PMID: 38301771 DOI: 10.1016/j.pharmthera.2024.108593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/28/2023] [Accepted: 12/29/2023] [Indexed: 02/03/2024]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a global metabolic disease with high prevalence in both adults and children. Importantly, NAFLD is becoming the main cause of hepatocellular carcinoma (HCC). Berberine (BBR), a naturally occurring plant component, has been demonstrated to have advantageous effects on a number of metabolic pathways as well as the ability to kill liver tumor cells by causing cell death and other routes. This permits us to speculate and make assumptions about the value of BBR in the prevention and defense against NAFLD and HCC by a global modulation of metabolic disorders. Herein, we briefly describe the etiology of NAFLD and NAFLD-related HCC, with a particular emphasis on analyzing the potential mechanisms of BBR in the treatment of NAFLD from aspects including increasing insulin sensitivity, controlling the intestinal milieu, and controlling lipid metabolism. We also elucidate the mechanism of BBR in the treatment of HCC. More significantly, we provided a list of clinical studies for BBR in NAFLD. Taking into account our conclusions and perspectives, we can make further progress in the treatment of BBR in NAFLD and NAFLD-related HCC.
Collapse
Affiliation(s)
- Xinyue Lin
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Juanhong Zhang
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China; College of Life Science, Northwest Normal University, Lanzhou 730070, China
| | - Yajun Chu
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Qiuying Nie
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Junmin Zhang
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
| |
Collapse
|
2
|
Ma Y, Gao W, Zhang Y, Yang M, Yan X, Zhang Y, Li G, Liu C, Xu C, Zhang M. Biomimetic MOF Nanoparticles Delivery of C-Dot Nanozyme and CRISPR/Cas9 System for Site-Specific Treatment of Ulcerative Colitis. ACS APPLIED MATERIALS & INTERFACES 2022; 14:6358-6369. [PMID: 35099925 DOI: 10.1021/acsami.1c21700] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Ulcerative colitis (UC) is a chronic inflammatory bowel disease (IBD) of unknown etiology affecting the colon and rectum. Previous studies have found that reactive oxygen species (ROS) overproduction and transmembrane glycoprotein CD98 (encoded by SLC3A2) upregulation played important roles in the initiation and progression of UC. On the basis of this, a biomimetic pH-responsive metal organic framework (MOF) carrier was constructed to deliver carbon nanodot-SOD nanozyme and clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) (CRISPR/Cas9) system for site-specific treatment of UC. In this system, carbon nanodots (C-dots) and CD98 CRISPR/Cas9 plasmid were successfully encapsulated into MOF carrier (ZIF-8 nanoparticles) by a one-pot approach (formed as CCZ), and then camouflaged with macrophage membrane (formed as CCZM). It was worth noting that the C-dot nanozyme showed excellent superoxide dismutase (SOD) enzymatic activity, which could scavenge ROS effectively. As expected, this biomimetic system exhibited pH-responsive, immune escape, and inflammation targeting capability simultaneously. In vitro experiments showed that ROS was significantly eliminated, and CD98 was downregulated by CCZM. In the dextran sulfate sodium salt (DSS)-induced UC model, administration of CCZM significantly ameliorated the inflammation symptoms of mice, including the colon length and pathological parameters such as epithelium integrity and inflammation infiltration. In addition, both in vitro and in vivo results demonstrated that biomimetic nanoparticles effectively reduced the expression of pro-inflammatory cytokines. Overall, this study would provide a promising approach for the precise treatment of UC.
Collapse
Affiliation(s)
- Yana Ma
- School of Basic Medical Sciences, Xi'an Key Laboratory of Immune Related Diseases, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi 710061, China
| | - Wenhui Gao
- School of Basic Medical Sciences, Xi'an Key Laboratory of Immune Related Diseases, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi 710061, China
| | - Yujie Zhang
- School of Basic Medical Sciences, Xi'an Key Laboratory of Immune Related Diseases, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi 710061, China
| | - Mei Yang
- School of Basic Medical Sciences, Xi'an Key Laboratory of Immune Related Diseases, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi 710061, China
| | - Xiangji Yan
- School of Basic Medical Sciences, Xi'an Key Laboratory of Immune Related Diseases, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi 710061, China
| | - Yuanyuan Zhang
- School of Basic Medical Sciences, Xi'an Key Laboratory of Immune Related Diseases, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi 710061, China
| | - Guanying Li
- School of Basic Medical Sciences, Xi'an Key Laboratory of Immune Related Diseases, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi 710061, China
| | - Cui Liu
- School of Basic Medical Sciences, Xi'an Key Laboratory of Immune Related Diseases, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi 710061, China
| | - Changlong Xu
- Department of Gastroenterology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
| | - Mingzhen Zhang
- School of Basic Medical Sciences, Xi'an Key Laboratory of Immune Related Diseases, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi 710061, China
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Digestive Disease Research Group, Georgia State University, Atlanta, Georgia 30302, United States
| |
Collapse
|
3
|
Chen X, Zhang YY, Ye D, Yang G, Song YN, Mo LH, Yang PC, Song JP. House Dust Mite Specific Antibodies induce Neutrophilic Inflammation in the Heart. Am J Cancer Res 2020; 10:8807-8817. [PMID: 32754279 PMCID: PMC7392007 DOI: 10.7150/thno.47134] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 06/19/2020] [Indexed: 12/28/2022] Open
Abstract
Rationale: Inflammatory heart disorders are among the causes of human death. The causative factors of heart inflammation are to be further elucidated. House dust mite (HDM)-derived protein antigens are involved in the pathogenesis of many human diseases. This study aims to investigate the role of HDM-specific autoantibodies in the pathogenesis of heart inflammation. Methods: Human heart tissue samples were obtained from surgically removed hearts in heart transplantation. The interaction of the heart tissues with HDM-specific antibodies was assessed by pertinent immune analysis. The role of HDM-specific autoantibodies in the induction of heart inflammation was assessed with a murine model. Results: HDM-specific IgG (mIgG) was detected in the serum of patients with myocarditis (Mcd); the mIgG titers were positively correlated with the neutrophil counts in the heart tissues. The mIgG specifically bound to keratin-10 (KRT10) in heart vascular endothelial cells and the heart tissue protein extracts. The amounts of C3a, C5a and C5b-9 were increased in the mouse heart tissues after exposing to mIgG. In the presence of the complement-containing serum, mIgG bound cardiovascular epithelial monolayers to impair the barrier functions. Administration of mIgG or HDM induced the Mcd-like inflammation in the heart, in which neutrophils were the dominant cellular components in the infiltration of inflammatory cells. Conclusions: Mcd patients with neutrophilic inflammation in the heart had higher serum levels of mIgG. The mIgG bound heart endothelial cells to impair the endothelial barrier functions and induce neutrophilic inflammation in the heart.
Collapse
|
4
|
Han MK, Baker M, Zhang Y, Yang C, Zhang M, Garg P, Viennois E, Merlin D. Overexpression of CD98 in intestinal epithelium dysregulates miRNAs and their targeted proteins along the ileal villus-crypt axis. Sci Rep 2018; 8:16220. [PMID: 30385787 PMCID: PMC6212412 DOI: 10.1038/s41598-018-34474-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 10/07/2018] [Indexed: 01/19/2023] Open
Abstract
CD98 has been implicated in the experimental model of inflammatory bowel disease. We have previously shown that IEC-specific overexpression of CD98 mediates intestinal inflammation and intestinal epithelial barrier dysfunction. Mice overexpressing CD98 exhibited severe colitis and a greater susceptibility to CAC. Here we demonstrated CD98 overexpression to dysregulate homeostatic gradient profile of miRNA and protein expression along the ileal villus-crypt axis. Using miRNA-target gene prediction module, we observed differentially expressed miRNAs to target proteins of villus and crypt profoundly affected by CD98 overexpression. We have utilized online bioinformatics as methods to further scrutinize the biological meanings of miRNA-target data. We identified significant interactions among the differentially regulated proteins targeted by altered miRNAs in Tg mice. The biological processes affected by the predicted targets of miRNAs deviate from the homeostatic functions of the miRNA-gene-protein axis of the wildtype mice. Our results emphasize a dynamic perturbation of miRNA and protein expression in villus-crypt axis contributing to potential biological consequences of altering CD98 expression. Our findings also suggest the need for a consideration of arrays of interacting biological entities (i.e. miRNAs-mRNAs, protein-protein interaction) or a combination comparison for a better understanding of the disease pathology which is necessary for an effective therapeutic target development.
Collapse
Affiliation(s)
- Moon K Han
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Center for Inflammation, Immunity and Infection, Digestive Disease Research Group, Georgia State University, Atlanta, 30303, USA.
| | - Mark Baker
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Center for Inflammation, Immunity and Infection, Digestive Disease Research Group, Georgia State University, Atlanta, 30303, USA
| | - Yuchen Zhang
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Center for Inflammation, Immunity and Infection, Digestive Disease Research Group, Georgia State University, Atlanta, 30303, USA
| | - Chunhua Yang
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Center for Inflammation, Immunity and Infection, Digestive Disease Research Group, Georgia State University, Atlanta, 30303, USA
| | - Mingzhen Zhang
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Center for Inflammation, Immunity and Infection, Digestive Disease Research Group, Georgia State University, Atlanta, 30303, USA
| | - Pallavi Garg
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Center for Inflammation, Immunity and Infection, Digestive Disease Research Group, Georgia State University, Atlanta, 30303, USA
| | - Emilie Viennois
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Center for Inflammation, Immunity and Infection, Digestive Disease Research Group, Georgia State University, Atlanta, 30303, USA
| | - Didier Merlin
- Institute for Biomedical Sciences, Center for Diagnostics and Therapeutics, Center for Inflammation, Immunity and Infection, Digestive Disease Research Group, Georgia State University, Atlanta, 30303, USA.,Atlanta Veterans Affairs Medical Center, Decatur, 30033, USA
| |
Collapse
|
5
|
Xu C, Sun G, Yang J, Sun Q, Tong Z. Interleukin-13 promotes expression of Alix to compromise renal tubular epithelial barrier function. Cell Biol Int 2015; 39:548-53. [PMID: 25597757 DOI: 10.1002/cbin.10433] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 12/25/2014] [Indexed: 12/17/2022]
Abstract
The epithelial barrier dysfunction plays a critical role in a number of kidney diseases. The mechanism is unclear. Alix is a protein involving in protein degradation in epithelial cells. This study aims to investigate that interleukin (IL)-13 inhibits Alix to compromise the kidney epithelial barrier function. In this study, the murine collecting duct cell line (M-1) was cultured in Transwell inserts to investigate the significance of Alix in compromising the epithelial barrier functions. T cell (Teff cells) proliferation assay was employed to assess the antigenicity of ovalbumin (OVA) that was transported across the M-1 monolayer barrier. The results showed that M-1 cells express Alix. Exposure to interleukin (IL)-13 markedly decreased the expression of Alix in M-1 cells, which compromised the M-1 monolayer barrier functions by showing the increases in the permeability to OVA. Over-expression of Alix abolished the IL-13-induced M-1 monolayer barrier dysfunction. Knockdown of Alix significantly increased M-1 monolayer permeability. The OVA collected from the Transwell basal chambers induced the OVA-specific T cell proliferation. We conclude that IL-13 compromises M-1 epithelial barrier functions via inhibiting Alix expression.
Collapse
Affiliation(s)
- Chen Xu
- Department of Nephrology, Beijing Chao-Yang Hospital Affiliated to Capital Medical University, Beijing, China
| | | | | | | | | |
Collapse
|
6
|
Mari A, Antonietta Ciardiello M, Passalacqua G, Vliagoftis H, Wardlaw AJ, Wickman M. Developments in the field of allergy in 2012 through the eyes of Clinical & Experimental Allergy. Clin Exp Allergy 2014; 43:1309-32. [PMID: 24118214 DOI: 10.1111/cea.12212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In 2012, we received 683 submissions and published 20 editorials, 38 reviews, 11 letters and 128 original articles. This represents an acceptance rate for original papers in the range of 20%. About 30% of original papers were triaged not to go out to review, either because the editors did not feel they had sufficient priority for publication or because the topic did not feel right for the readers of the journal. We place great emphasis on obtaining sufficient high-quality reviews to make our decisions on publication fair and consistent. Inevitably, however, there is a degree of luck about what gets published and which papers miss out, and we are always happy to receive an appeal on our decisions either at the triage stage or after review. This gives us the opportunity to revisit the decision and revise it or explain in more detail to the authors the basis for the decision. Once again in 2012, we were delighted by the quality of the papers submitted and the breadth and depth of research into allergic disease that it revealed. The pattern of papers submitted was similar in previous years with considerable emphasis on all aspects of asthma and rhinitis. We were particularly pleased with our special issue on severe asthma. Elucidating mechanisms using either animal models or patients has always been a major theme of the journal, and the excellent work in these areas has been summarized by Harissios Vliagoftis with a particularly interesting section on early-life events guiding the development of allergic disease, which understandably continue to be a major theme of research. Magnus Wickman summarized the papers looking at the epidemiology of allergic disease including work from birth cohorts, which are an increasingly rich source of data on risk factors for allergic disease, and two papers on the epidemiology of anaphylaxis. Giovanni Passalacqua discussed the papers in the clinical allergy section of the journal, and Adriano Mari who runs the excellent Allergome website discussed the papers looking at allergens including characterization and the relative usefulness of allergen arrays versus single extracts in diagnosis and management.
Collapse
Affiliation(s)
- A Mari
- Allergome, Allergy Data Laboratories s.c., Latina, Italy
| | | | | | | | | | | |
Collapse
|
7
|
Yu Y, Chen S, Lu GF, Wu Y, Mo L, Liu ZQ, Zheng PY, Liu Z, Yang PC. Alphavbeta6 is required in maintaining the intestinal epithelial barrier function. Cell Biol Int 2014; 38:777-81. [PMID: 24677750 DOI: 10.1002/cbin.10258] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 01/27/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Yong Yu
- Department of Gastroenterology, the Second Hospital; Zhengzhou University; Zhengzhou China
| | - Si Chen
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy & Immunology; Shenzhen University; Shenzhen China
| | - Gao-Feng Lu
- Department of Gastroenterology, the Second Hospital; Zhengzhou University; Zhengzhou China
| | - Yingying Wu
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy & Immunology; Shenzhen University; Shenzhen China
| | - Lihua Mo
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy & Immunology; Shenzhen University; Shenzhen China
| | - Zhi-Qiang Liu
- ENT Institute of Shenzhen University, Longgang Central Hospital; ENT Hospital, Shenzhen ENT Institute; Shenzhen China
| | - Peng-Yuan Zheng
- Department of Gastroenterology, the Second Hospital; Zhengzhou University; Zhengzhou China
| | - Zhigang Liu
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy & Immunology; Shenzhen University; Shenzhen China
| | - Ping-Chang Yang
- State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy & Immunology; Shenzhen University; Shenzhen China
| |
Collapse
|
8
|
Liao YW, Wu XM, Jia J, Wu XL, Hong T, Meng LX, Wu XY. Myosin VI contributes to maintaining epithelial barrier function. J Biomed Sci 2013; 20:68. [PMID: 24028494 PMCID: PMC3847564 DOI: 10.1186/1423-0127-20-68] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 09/10/2013] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Epithelial barrier dysfunction is associated with the pathogenesis of a number of immune inflammations; the etiology is not fully understood. The fusion of endosome/lysosome is a critical process in the degradation of endocytic antigens in epithelial cells. Recent reports indicate that myosin VI (myo6) is involved in the activities of endosomes. The present study aims to investigate the role of myo6 in epithelial barrier dysfunction. RESULTS The endosome accumulation was observed in myo6-deficient Rmcs. More than 80% endosomes were fused with lysosomes in naïve Rmcs while less than 30% endosomes were fused with lysosomes in the myo6-deficient Rmcs. The myo6-deficient Rmc monolayers showed high permeability to a macromolecular antigen, ovalbumin, the latter still conserved the antigenicity, which induced strong T cell activation. CONCLUSIONS We conclude that myo6 plays a critical role in the fusion of endosome/lysosome in Rmc epithelial cells. Deficiency of myo6 compromises the epithelial barrier function.
Collapse
Affiliation(s)
- Yu-Wei Liao
- Department of Anesthesiology, Shengjing Hospital, China Medical University, 36 Sanhao St, Shenyang 110004, China.
| | | | | | | | | | | | | |
Collapse
|
9
|
Current world literature. Curr Opin Allergy Clin Immunol 2013; 13:119-24. [PMID: 23242117 DOI: 10.1097/aci.0b013e32835cb509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
10
|
Liao YW, Wu XM, Jia J, Wu XL, Tao H, Wang HY. Proteolytic antigens interfere with endosome/lysosome fusion in epithelial cells. Biochem Cell Biol 2013; 91:449-54. [PMID: 24219287 DOI: 10.1139/bcb-2012-0115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The airway epithelial barrier function is important in maintaining the homeostasis in the body. A number of airway disorders are associated with the epithelial barrier dysfunction. The present study aims to elucidate a possible mechanism by which the proteolytic allergens compromise the epithelial barrier function. The airway epithelial cell line, RPMI 2650 cells (Rp cells) and kidney epithelial cell line, MDCK cells, were cultured to be monolayers and used as an in vitro epithelial barrier model. House dust mite antigen, Der P1 (Der) was used as an antigen that has the proteolytic property. The epithelial barrier permeability and transepithelial resistance (TER) were used as the indicators of epithelial barrier function. Both epithelial cell lines could endocytose Der in the culture. Some of the Der was transported across the epithelial barrier to the basal chambers of the Transwells without affecting the TER. The endocytic Der could suppress the expression of ubiquitin E3 lases A20 and further interfered with the fusion of endosome/lysosome in the epithelial cells. Mite antigen, Der, can interfere with the fusion of endosome/lysosome in epithelial cells to induce the epithelial barrier dysfunction.
Collapse
Affiliation(s)
- Yu-Wei Liao
- Department of Anesthesiology, Shengjing Hospital, China Medical University, Shenyang, China
| | | | | | | | | | | |
Collapse
|
11
|
Song CH, Liu ZQ, Huang S, Zheng PY, Yang PC. Probiotics promote endocytic allergen degradation in gut epithelial cells. Biochem Biophys Res Commun 2012; 426:135-40. [PMID: 22925894 DOI: 10.1016/j.bbrc.2012.08.051] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 08/13/2012] [Indexed: 12/31/2022]
Abstract
BACKGROUND AND AIMS Epithelial barrier dysfunction plays a critical role in the pathogenesis of allergic diseases; the mechanism is to be further understood. The ubiquitin E3 ligase A20 (A20) plays a role in the endocytic protein degradation in the cells. This study aims to elucidate the role of A20 in the maintenance of gut epithelial barrier function. METHODS Gut epithelial cell line, HT-29 cell, was cultured into monolayers to evaluate the barrier function in transwells. RNA interference was employed to knock down the A20 gene in HT-29 cells to test the role of A20 in the maintenance of epithelial barrier function. Probiotic derived proteins were extracted from the culture supernatants using to enhance the expression of A20 in HT-29 cells. RESULTS The results showed that the knockdown of A20 compromised the epithelial barrier function in HT-29 monolayers, mainly increased the intracellular permeability. The fusion of endosome/lysosome was disturbed in the A20-deficient HT-29 cells. Allergens collected from the transwell basal chambers of A20-deficient HT-29 monolayers still conserved functional antigenicity. Treating with probiotic derived proteins increased the expression of A20 in HT-29 cells and promote the barrier function. CONCLUSION A20 plays an important role in the maintenance of epithelial barrier function as shown by HT-29 monolayer. Probiotic derived protein increases the expression of A20 and promote the HT-29 monolayer barrier function.
Collapse
Affiliation(s)
- Chun-Hua Song
- Department of Epidemiology & Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, China
| | | | | | | | | |
Collapse
|