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Rotavirus-Induced Early Activation of the RhoA/ROCK/MLC Signaling Pathway Mediates the Disruption of Tight Junctions in Polarized MDCK Cells. Sci Rep 2018; 8:13931. [PMID: 30224682 PMCID: PMC6141481 DOI: 10.1038/s41598-018-32352-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Accepted: 09/06/2018] [Indexed: 02/02/2023] Open
Abstract
Intestinal epithelial tight junctions (TJ) are a major barrier restricting the entry of various harmful factors including pathogens; however, they also represent an important entry portal for pathogens. Although the rotavirus-induced early disruption of TJ integrity and targeting of TJ proteins as coreceptors are well-defined, the precise molecular mechanisms involved remain unknown. In the present study, infection of polarized MDCK cells with the species A rotavirus (RVA) strains human DS-1 and bovine NCDV induced a redistribution of TJ proteins into the cytoplasm, a reversible decrease in transepithelial resistance, and an increase in paracellular permeability. RhoA/ROCK/MLC signaling was identified as activated at an early stage of infection, while inhibition of this pathway prevented the rotavirus-induced early disruption of TJ integrity and alteration of TJ protein distribution. Activation of pMYPT, PKC, or MLCK, which are known to participate in TJ dissociation, was not observed in MDCK cells infected with either rotavirus strain. Our data demonstrated that binding of RVA virions or cogent VP8* proteins to cellular receptors activates RhoA/ROCK/MLC signaling, which alters TJ protein distribution and disrupts TJ integrity via contraction of the perijunctional actomyosin ring, facilitating virion access to coreceptors and entry into cells.
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202
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Increased expression of claudin-17 promotes a malignant phenotype in hepatocyte via Tyk2/Stat3 signaling and is associated with poor prognosis in patients with hepatocellular carcinoma. Diagn Pathol 2018; 13:72. [PMID: 30219077 PMCID: PMC6138900 DOI: 10.1186/s13000-018-0749-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 09/03/2018] [Indexed: 01/28/2023] Open
Abstract
Background Hepatocellular carcinoma (HCC) is the second leading cause of cancer death in Asia; however, the molecular mechanism in its tumorigenesis remains unclear. Abnormal expression of claudins (CLDNs), a family of tight junction (TJ) proteins, plays an important role in the metastatic phenotype of epithelial-derived tumors by affecting tight junction structure, function and related cellular signaling pathways. In a previous study, we used a tissue chip assay to identify CLDN17 as an upregulated gene in HCC. Here we aimed to use molecular biology technology to explore the effect of CLDN17 on the malignant phenotype of HCC and the underlying molecular mechanism, with the objective of identifying a new target for HCC treatment and the control of HCC metastasis. Method The expression levels of CLDN17 in HCC tissues and histologically non-neoplastic hepatic tissues were explored by immunohistochemistry. Stable transfection of the hepatocyte line HL7702 with CLDN17 was detected by real-time polymerase chain reaction (PCR), western blotting and immunofluorescence. The impact of CLDN17 on the malignant phenotype of HL7702 cells in vitro was assessed by a Cell Counting Kit-8 (CCK8) assay, a Transwell assay and a wound-healing experiment. Western blotting was utilized to detect the activation state of Tyrosine kinase 2 (Tyk2) / signal transducer and activator of transcription3 (Stat3) pathway. A Tyk2 RNA interference (RNAi) was utilized to determine the impact of the Tyk2/Stat3 signaling pathway on the malignant phenotype of hepatocytes. Results In this work, our research group first found that CLDN17 was highly expressed in HCC tissues and was associated with poor prognosis. In addition, we demonstrated that CLDN17 affected the Stat3 signaling pathway via Tyk2 and ultimately enhanced the migration ability of hepatocytes. Conclusion In conclusion, we confirmed that the upregulated expression of CLDN17 significantly enhances the migration ability of hepatocytes in vitro and we found that the activation of the Stat3 pathway by Tyk2 may an important mechanism by which CLDN17 promotes aggressiveness in hepatocytes.
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203
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Xu L, Cai J, Tian A, Qian K, Qin R, Qi S, Tan X, Qiu Y, Gong M, Han B, Hu X. The Effect of Prim-O-Glucosylcimifugin on Tryptase-Induced Intestinal Barrier Dysfunction in Caco-2 Cells. Biol Pharm Bull 2018; 41:1355-1361. [PMID: 29910215 DOI: 10.1248/bpb.b18-00059] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The intestinal barrier dysfunction is a critical pathological change in irritable bowel syndrome (IBS). The objective of this study was to evaluate the effect of Prim-O-glucosylcimifugin (POG) on intestinal barrier dysfunction and reveal possible molecular mechanisms. Human colon adenocarcinoma cell line (Caco-2) cell monolayers induced by tryptase (TRYP) were used to establish an intestinal barrier dysfunction model. Caco-2 cell monolayers from both functional and dysfunctional samples were treated with POG (30, 60 and 120 µg/mL) for 2, 8, 24, 36, 48 and 72 h. The Caco-2 cell monolayers were assessed by measurement of trans-epithelial electrical resistance (TEER) and percentage of fluorescein permeation (PFP). The expression of Protease Activated Receptor 2 (PAR-2) and myosin light chain kinase (MLCK) mRNA was analyzed by RT-PCR and the level of Zonula Occludens-1 (ZO-1) protein expression was determined by Western blot. In addition, the impact of POG on the distribution of the tight juction protein of Occludin was performed by immunofluorescence. Our results showed that POG elevated the TEER and decreased the PFP of the functional Caco-2 cell monolayers, as well as the dysfunctional Caco-2 cell monolayers. Furthermore, POG inhibited the expression of PAR-2 mRNA and MLCK mRNA and increased the level of ZO-1 protein expression in dysfunctional Caco-2 cells. The distribution of the Occludin proteins was ameliorated simultaneously. This study demonstrates that POG can enhance the intestinal barrier function of Caco-2 cell monolayers by inhibiting the expression of PAR-2 and MLCK and up-regulating the expression of ZO-1 protein, and ameliorated the distribution of Occludin protein.
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Affiliation(s)
- Lu Xu
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Jieyi Cai
- The First Affiliated Hospital of Guangdong Pharmaceutical University
| | - Aofei Tian
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Kai Qian
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Renan Qin
- Guangzhou Baiyun Mountain Hutchison Whampoa Traditional Chinese Medicine Co., Ltd
| | - Shaoyun Qi
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Xupeng Tan
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Yuqin Qiu
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Mengjuan Gong
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Bin Han
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Xuguang Hu
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
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204
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Kiewiet MBG, González Rodríguez MI, Dekkers R, Gros M, Ulfman LH, Groeneveld A, de Vos P, Faas MM. The epithelial barrier-protecting properties of a soy hydrolysate. Food Funct 2018; 9:4164-4172. [PMID: 30066013 DOI: 10.1039/c8fo00913a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Enhancing the epithelial barrier function could be a possible strategy to prevent food allergy or reduce its symptoms. Soy hydrolysates containing bioactive peptides could be instrumental in this. In this study, the protective effects of pretreatment with 6 soy hydrolysates on calcium ionophore A23187-induced TEER reduction were studied in T84 cells. The effects of the most potent soy hydrolysate on tight junction gene expression were studied. In order to identify the underlying pathways involved, the barrier disruptor specificity of the effect was studied by comparing the protective effects on TEER and Lucifer Yellow flux after the exposure to barrier disruptors that work via different intracellular pathways, i.e. the disruptors A23187, mellitin, and deoxynivalenol (DON). Preincubation with one of the six hydrolysates protected the epithelial cells from a decrease in TEER induced by A23187 (restored to 105% of the starting point, while A23187 alone decreased to 53% of the starting value) and mellitin (restored to 11% of the starting point, while mellitin alone decreased to 3.8% of the starting value). This soy hydrolysate was found to increase claudin-1 and decrease claudin-2 expression. The protective effect of the hydrolysate on TEER was specific for the barrier disruptors A23187 and mellitin, but was not observed for DON. This observation suggests that the soy hydrolysate may act via PKC isoforms, which are known to lead to changes in the expression of claudin-1 and 2. Our data suggest that specific soy hydrolysates may be designed to strengthen the epithelial barrier which might be instrumental in the management of the barrier function in individuals at risk of developing food allergy.
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Affiliation(s)
- Mensiena B G Kiewiet
- Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands.
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205
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Shi R, Li M, Raghavan V, Tam S, Cabanero M, Pham NA, Shepherd FA, Moghal N, Tsao MS. Targeting the CDK4/6-Rb Pathway Enhances Response to PI3K Inhibition in PIK3CA-Mutant Lung Squamous Cell Carcinoma. Clin Cancer Res 2018; 24:5990-6000. [PMID: 30093452 DOI: 10.1158/1078-0432.ccr-18-0717] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 07/18/2018] [Accepted: 07/30/2018] [Indexed: 11/16/2022]
Abstract
PURPOSE Lung squamous cell carcinoma (LUSC) is a major subtype of non-small cell lung cancer characterized by multiple genetic alterations, particularly PI3K pathway alterations which have been identified in over 50% of LUSC cases. Despite being an attractive target, single-agent PI3K inhibitors have demonstrated modest response in LUSC. Thus, novel combination therapies targeting LUSC are needed. EXPERIMENTAL DESIGN PI3K inhibitors alone and in combination with CDK4/6 inhibitors were evaluated in previously established LUSC patient-derived xenografts (PDX) using an in vivo screening method. Screening results were validated with in vivo expansion to 5 to 8 mice per arm. Pharmacodynamics studies were performed to confirm targeted inhibition of compounds. RESULTS Consistent with results from The Cancer Genome Atlas analysis of LUSC, genomic profiling of our large cohort of LUSC PDX models identified PI3K pathway alterations in over 50% of the models. In vivo screening using PI3K inhibitors in 12 of these models identified PIK3CA mutation as a predictive biomarker of response (<20% tumor growth compared with baseline/vehicle). Combined inhibition of PI3K and CDK4/6 in models with PIK3CA mutation resulted in greater antitumor effects compared with either monotherapy alone. In addition, the combination of the two drugs achieved targeted inhibition of the PI3K and cell-cycle pathways. CONCLUSIONS PIK3CA mutations predict response to PI3K inhibitors in LUSC. Combined PI3K and CDK4/6 inhibition enhances response to either single agents alone. Our findings provide a rationale for clinical testing of combined PI3K and CDK4/6 inhibitors in PIK3CA-mutant LUSC.
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Affiliation(s)
- Ruoshi Shi
- University Health Network, Ontario Cancer Institute/Princess Margaret Cancer Centre, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Ming Li
- University Health Network, Ontario Cancer Institute/Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | - Vibha Raghavan
- University Health Network, Ontario Cancer Institute/Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | - Shirley Tam
- University Health Network, Ontario Cancer Institute/Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | - Michael Cabanero
- University Health Network, Ontario Cancer Institute/Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | - Nhu-An Pham
- University Health Network, Ontario Cancer Institute/Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | - Frances A Shepherd
- University Health Network, Ontario Cancer Institute/Princess Margaret Cancer Centre, Toronto, Ontario, Canada.,Department of Medical Oncology and Hematology, University of Toronto, Toronto, Ontario, Canada
| | - Nadeem Moghal
- University Health Network, Ontario Cancer Institute/Princess Margaret Cancer Centre, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Ming-Sound Tsao
- University Health Network, Ontario Cancer Institute/Princess Margaret Cancer Centre, Toronto, Ontario, Canada. .,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
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206
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Jajack A, Brothers M, Kasting G, Heikenfeld J. Enhancing glucose flux into sweat by increasing paracellular permeability of the sweat gland. PLoS One 2018; 13:e0200009. [PMID: 30011292 PMCID: PMC6047769 DOI: 10.1371/journal.pone.0200009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 06/18/2018] [Indexed: 11/24/2022] Open
Abstract
Non-invasive wearable biosensors provide real-time, continuous, and actionable health information. However, difficulties detecting diluted biomarkers in excreted biofluids limit practical applications. Most biomarkers of interest are transported paracellularly into excreted biofluids from biomarker-rich blood and interstitial fluid during normal modulation of cellular tight junctions. Calcium chelators are reversible tight junction modulators that have been shown to increase absorption across the intestinal epithelium. However, calcium chelators have not yet been shown to improve the extraction of biomarkers. Here we show that for glucose, a paracellularly transported biomarker, the flux into sweat can be increased by >10x using citrate, a calcium chelator, in combination with electroosmosis. Our results demonstrate a method of increasing glucose flux through the sweat gland epithelium, thereby increasing the concentration in sweat. Future work should examine if this method enhances flux for other paracellularly transported biomarkers to make it possible to detect more biomarkers with currently available biosensors.
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Affiliation(s)
- Andrew Jajack
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, United States of America
- * E-mail:
| | - Michael Brothers
- UES, Incorporated, Dayton, Ohio, United States of America
- 711th Human Performance Wing, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio, United States of America
| | - Gerald Kasting
- James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Jason Heikenfeld
- Department of Electrical Engineering and Computing Systems, University of Cincinnati, Cincinnati, Ohio, United States of America
- Eccrine Systems, Incorporated, Cincinnati, Ohio, United States of America
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207
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Liu S, Song M, Yun W, Lee J, Lee C, Kwak W, Han N, Kim H, Cho J. Effects of oral administration of different dosages of carvacrol essential oils on intestinal barrier function in broilers. J Anim Physiol Anim Nutr (Berl) 2018; 102:1257-1265. [PMID: 29968943 DOI: 10.1111/jpn.12944] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 04/24/2018] [Accepted: 05/18/2018] [Indexed: 11/28/2022]
Abstract
Essential oils are widely used in the pharmaceutical, food and cosmetic industries, and many plant essential oils have shown that they have positive effects on broilers nutrition. This experiment was conducted to study the effects of orally administered different dosages of carvacrol essential oils on intestinal barrier function in broiler chickens. A total of eighty 28-day-old (1.28 ± 0.15 kg) ROSS 308 broilers were randomly allocated to four groups of 20 replicates each, with one chicken per replicate per cage, and all were fed with the same diet. Four experimental groups were orally administered 0, 200, 300 or 400 μl carvacrol essential oils at 18:00 hr every day during the 2-week experimental period. As a result of which, the gene expression of the occludin, claudin-1, claudin-5, ZO-1 and ZO-2 in intestinal mucosa of small intestine (p < 0.05) and the goblet cell content in small intestine epithelium (p < 0.05) were significantly increased; test subjects with 300 or 400 μl carvacrol essential oils reduced the microbial counts of Salmonella spp. and Escherichia coli in the intestines (p < 0.05); Essential oils administration also significantly increased activity of the sucrase (p < 0.05) and lactase (p < 0.05) in intestinal mucosa. In conclusion, the carvacrol essential oils have positive effects on growth performance and intestinal barriers function of broilers; those effects may be related to the dosage, as administration of 300 or 400 μl was more effective than that of 200 μl.
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Affiliation(s)
- ShuDong Liu
- Division of Food and Animal Science, Chungbuk National University, Cheongju-si, Korea
| | - MinHo Song
- Department of Animal Science and Biotechnology, Chungnam National University, Daejeon, Korea
| | - Won Yun
- Division of Food and Animal Science, Chungbuk National University, Cheongju-si, Korea
| | - JiHwan Lee
- Division of Food and Animal Science, Chungbuk National University, Cheongju-si, Korea
| | - ChangHee Lee
- Division of Food and Animal Science, Chungbuk National University, Cheongju-si, Korea
| | - WooGi Kwak
- Division of Food and Animal Science, Chungbuk National University, Cheongju-si, Korea
| | - NamSoo Han
- Department of Food Science and Biotechnology, Chungbuk National University, Cheongju-si, Korea
| | - HyeunBum Kim
- Department of Animal Resource and Science, Dankook University, Cheonan, Korea
| | - JinHo Cho
- Division of Food and Animal Science, Chungbuk National University, Cheongju-si, Korea
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208
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Abourehab MA, Ahmed OA, Balata GF, Almalki WH. Self-assembled biodegradable polymeric micelles to improve dapoxetine delivery across the blood-brain barrier. Int J Nanomedicine 2018; 13:3679-3687. [PMID: 29983562 PMCID: PMC6027843 DOI: 10.2147/ijn.s168148] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Background Dapoxetine (DPX) is the drug of choice for the specific treatment of premature ejaculation. DPX is characterized by relatively low bioavailability (42%) and short half-life (1.5 h). The aim of this study was to improve DPX bioavailability and delivery across the blood–brain barrier (BBB) using a nanostructured DPX formulation for improved DPX efficacy and patient satisfaction. Materials and methods DPX-loaded polymeric micelles (PMs) formulations (F1–F3) were characterized for particle sizes, entrapment efficiencies, and Fourier transform infrared spectroscopic and transmission electron microscopic evaluations. In addition, diffusion profiles of the prepared formulations were investigated. Animal model pharmacokinetic parameters in plasma and brain tissues were investigated and compared with commercial DPX tablets. Results Particle size analysis revealed that formulations of DPX PMs showed a narrow range of 62.7±9.3–45.45±9.1 nm for F1–F3. In addition, DPX PMs showed a sustained release pattern with 91.27%±7.64%, 79.43%±7.81%, and 63.78%±5.05% of DPX content permeated after 24 h for F1, F2, and F3, respectively. Plasma pharmacokinetic parameters for DPX PMs showed significant increase (P<0.05) for the area under drug concentration–time curves in plasma and brain tissues compared with commercial DPX tablets. Conclusion DPX formulations in the form of PMs improved bioavailability and efficacy across the BBB. This DPX formulation provided improved brain delivery in order to enhance the convenience and compliance of patients.
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Affiliation(s)
- Mohammed As Abourehab
- Department of Pharmaceutics, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia, .,Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Minia University, Minia, Egypt,
| | - Osama Aa Ahmed
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Minia University, Minia, Egypt, .,Nanotechnology Laboratory, Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Gehan F Balata
- Department of Pharmaceutics, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Waleed H Almalki
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
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209
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Transcriptional profiles of PBMCs from pigs infected with three genetically diverse porcine reproductive and respiratory syndrome virus strains. Mol Biol Rep 2018; 45:675-688. [PMID: 29882085 PMCID: PMC6156768 DOI: 10.1007/s11033-018-4204-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 05/31/2018] [Indexed: 01/23/2023]
Abstract
Porcine reproductive and respiratory syndrome virus is the cause of reproductive failure in sows and respiratory disease in young pigs, which has been considered as one of the most costly diseases to the worldwide pig industry for almost 30 years. This study used microarray-based transcriptomic analysis of PBMCs from experimentally infected pigs to explore the patterns of immune dysregulation after infection with two East European PRRSV strains from subtype 2 (BOR and ILI) in comparison to a Danish subtype 1 strain (DAN). Transcriptional profiles were determined at day 7 post infection in three tested groups of pigs and analysed in comparison with the expression profile of control group. Microarray analysis revealed differential regulation (> 1.5-fold change) of 4253 and 7335 genes in groups infected with BOR and ILI strains, respectively, and of 12518 genes in pigs infected with Danish strain. Subtype 2 PRRSV strains showed greater induction of many genes, especially those involved in innate immunity, such as interferon stimulated antiviral genes and inflammatory markers. Functional analysis of the microarray data revealed a significant up-regulation of genes involved in processes such as acute phase response, granulocyte and agranulocyte adhesion and diapedesis, as well as down-regulation of genes enrolled in pathways engaged in protein synthesis, cell division, as well as B and T cell signaling. This study provided an insight into the host response to three different PRRSV strains at a molecular level and demonstrated variability between strains of different pathogenicity level.
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210
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Sim TY, Harith HH, Tham CL, Md Hashim NF, Shaari K, Sulaiman MR, Israf DA. The Protective Effects of a Synthetic Geranyl Acetophenone in a Cellular Model of TNF-α-Induced Pulmonary Epithelial Barrier Dysfunction. Molecules 2018; 23:molecules23061355. [PMID: 29874809 PMCID: PMC6100020 DOI: 10.3390/molecules23061355] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 05/19/2018] [Accepted: 05/25/2018] [Indexed: 01/19/2023] Open
Abstract
Alveolar epithelial barrier dysfunction contributes to lung edema and can lead to acute lung injury (ALI). The features include increased epithelial permeability, upregulation of inflammatory mediators and downregulation of junctional complex molecules; these changes are often induced by inflammation. tHGA is an acetophenone analogue with therapeutic potential in asthma. Its therapeutic potential in ALI is presently unknown. Herein, the effects of tHGA on epithelial barrier dysfunction were determined in TNF-α-induced human alveolar epithelial cells. The anti-inflammatory properties of tHGA were assessed by monocyte adhesion assay and analysis of MCP-1 and ICAM-1 expression. The epithelial barrier function was assessed by paracellular permeability and transepithelial electrical resistance (TEER) assays, and analysis of junctional complex molecules expression. To elucidate the mechanism of action, the effects of tHGA on the NF-κB and MAPK pathways were determined. Gene and protein expression were analyzed by RT-PCR and Western blotting or ELISA, respectively. tHGA suppressed leukocyte adhesion to TNF-α-induced epithelium and reduced MCP-1 and ICAM-1 gene expression and secretion. tHGA also increased TEER readings, reduced epithelial permeability and enhanced expression of junctional complex molecules (zona occludens-1, occludin and E-cadherin) in TNF-α-induced cells. Correspondingly, the NF-κB, ERK and p38 MAPK pathways were also inhibited by tHGA. These findings suggest that tHGA is able to preserve alveolar epithelial barrier function in response to acute inflammation, via its anti-inflammatory activity and stabilization of epithelial barrier integrity, mediated by NF-κB, ERK and p38 MAPK signaling.
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Affiliation(s)
- Tee Yee Sim
- Department of Biomedical Science, Faculty of Medicine & Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
| | - Hanis Hazeera Harith
- Department of Biomedical Science, Faculty of Medicine & Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
| | - Chau Ling Tham
- Department of Biomedical Science, Faculty of Medicine & Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
| | - Nur Fariesha Md Hashim
- Department of Biomedical Science, Faculty of Medicine & Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
| | - Khozirah Shaari
- Natural Products Laboratory, Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
| | - Mohd Roslan Sulaiman
- Department of Biomedical Science, Faculty of Medicine & Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
| | - Daud Ahmad Israf
- Department of Biomedical Science, Faculty of Medicine & Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
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211
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Yang L, Sun X, Meng X. Differences in the expression profiles of claudin proteins in human gastric carcinoma compared with non‑neoplastic mucosa. Mol Med Rep 2018; 18:1271-1278. [PMID: 29901188 PMCID: PMC6072183 DOI: 10.3892/mmr.2018.9122] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Accepted: 03/01/2018] [Indexed: 01/12/2023] Open
Abstract
Numerous genetic alterations associated with cancer progression have the potential to serve as biomarkers for the early diagnosis of cancer. Numerous studies have suggested that claudin proteins, which are the primary components of tight junction structures, are associated with the regulation of cell polarity and cell differentiation. To investigate the expression profiles of the tight junction proteins claudin-2, −5, −7 and −8 in gastric carcinoma, immunohistochemical analysis, western blotting and reverse transcription-quantitative polymerase chain reaction analysis was used to detect the expression profiles of these claudin proteins in gastric carcinoma tissues and in homologous non-neoplastic mucosal tissues. According to the present study, the expression levels of claudin-7 and claudin-8 were downregulated, while the expression of claudin-5 was upregulated in gastric carcinoma tissues compared with in non-neoplastic mucosal tissues. Additionally, no notable difference was observed between claudin-2 expression in gastric carcinoma tissues and non-neoplastic mucosae. Correlations between claudin-7 and −8 expression and lymphatic metastasis in gastric carcinoma tissues were additionally reported. In summary, the present study revealed the distinct expression profiles of claudin-5, −7 and −8 in non-neoplastic mucosal tissues and gastric carcinoma tissues. Furthermore, the expression of these claudin proteins was highly associated with metastatic progression and prognosis in patients with gastric carcinoma, and had predictive value for the metastasis and survival of patients with gastric carcinoma.
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Affiliation(s)
- Luoluo Yang
- Department of Gastroenterology, First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Xun Sun
- Department of Pathology, First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Xiangwei Meng
- Department of Gastroenterology, First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
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212
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Luo PL, Wang YJ, Yang YY, Yang JJ. Hypoxia-induced hyperpermeability of rat glomerular endothelial cells involves HIF-2α mediated changes in the expression of occludin and ZO-1. ACTA ACUST UNITED AC 2018; 51:e6201. [PMID: 29791586 PMCID: PMC5972023 DOI: 10.1590/1414-431x20186201] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 03/05/2018] [Indexed: 01/11/2023]
Abstract
This study aimed to investigate the role of hypoxia-inducible factor-2α (HIF-2α) in the expression of tight junction proteins and permeability alterations in rat glomerular endothelial cells (rGENCs) under hypoxia conditions. The expression level of HIF-2α and tight junction proteins (occludin and ZO-1) in rGENCs were examined following 5% oxygen density exposure at different treatment times. HIF-2α lentivirus transfection was used to knockdown HIF-2α expression. Cells were divided into four groups: 1) control group (rGENCs were cultured under normal oxygen conditions), 2) hypoxia group (rGENCs were cultured under hypoxic conditions), 3) negative control group (rGENCs were infected with HIF-2α lentivirus negative control vectors and cultured under hypoxic conditions), and 4) Len group (rGENCs were transfected with HIF-2α lentivirus and cultured under hypoxic conditions). The hypoxia, negative control, and Len groups were kept in a hypoxic chamber (5% O2, 5% CO2, and 90% N2) for 24 h and the total content of occludin and ZO-1, and the permeability of rGENCs were assessed. With increasing hypoxia time, the expression of HIF-2α gradually increased, while the expression of occludin decreased, with a significant difference between groups. ZO-1 expression gradually decreased under hypoxia conditions, but the difference between the 24 and 48 h groups was not significant. The permeability of cells increased following 24-h exposure to hypoxia compared to the control group (P<0.01). The knockdown of HIF-2α expression significantly increased occludin and ZO-1 content compared with hypoxia and negative control groups (P<0.01), while permeability was reduced (P<0.01). Hypoxia increased HIF-2α content, inducing permeability of rGENCs through the reduced expression of occludin and ZO-1.
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Affiliation(s)
- Peng-Li Luo
- Department of Nephrology, Hospital of Qinghai University, Xining, China
| | - Yan-Jun Wang
- Department of Nephrology, Hospital of Qinghai University, Xining, China
| | - Yan-Yan Yang
- Department of Nephrology, Hospital of Qinghai University, Xining, China
| | - Jia-Jia Yang
- Department of Nephrology, Hospital of Qinghai University, Xining, China
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213
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Tang Z, Guo D, Xiong L, Wu B, Xu X, Fu J, Kong L, Liu Z, Xie C. TLR4/PKCα/occludin signaling pathway may be related to blood‑brain barrier damage. Mol Med Rep 2018; 18:1051-1057. [PMID: 29845266 DOI: 10.3892/mmr.2018.9025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Accepted: 10/11/2017] [Indexed: 11/05/2022] Open
Affiliation(s)
- Zhixian Tang
- Department of Cardiothoracic Surgery, Heart Center, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Dan Guo
- Department of Histology and Embryology, Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Liang Xiong
- Department of Preventive Medicine, Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Bing Wu
- Department of Anatomy, Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Xuehua Xu
- Department of Cardiothoracic Surgery, Heart Center, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Jinfeng Fu
- Department of Operation Room, Heart Center, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Liyun Kong
- Department of Operation Room, Heart Center, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Ziyou Liu
- Department of Cardiothoracic Surgery, Heart Center, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Chunfa Xie
- Department of Cardiothoracic Surgery, Heart Center, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
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214
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Zhou ZY, Huang B, Li S, Huang XH, Tang JY, Kwan YW, Hoi PM, Lee SMY. Sodium tanshinone IIA sulfonate promotes endothelial integrity via regulating VE-cadherin dynamics and RhoA/ROCK-mediated cellular contractility and prevents atorvastatin-induced intracerebral hemorrhage in zebrafish. Toxicol Appl Pharmacol 2018; 350:32-42. [PMID: 29730311 DOI: 10.1016/j.taap.2018.04.037] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Revised: 04/27/2018] [Accepted: 04/30/2018] [Indexed: 01/02/2023]
Abstract
Impaired vascular integrity leads to serious cerebral vascular diseases such as intracerebral hemorrhage (ICH). In addition, high-dose statin therapy is suggested to cause increased ICH risk due to unclear effects of general inhibition of 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR) on the vascular system. Here we evaluated the protective effects of sodium tanshinone IIA sulfonate (STS), which has high efficacy and safety in clinical studies of ischemic stroke, by using atorvastatin (Ator) induced ICH zebrafish embryos and human umbilical vein endothelial cells (HUVECs). By using double transgenic Tg(fli1a:EGFP)y1 & Tg(gata1a:dsRed)sd2 zebrafish, we demonstrated that STS effectively reduced the occurrence and area of hemorrhage induced by Ator in zebrafish and restored impairment in motor function. We further demonstrated that Ator-induced disruption in VE-cadherin (VEC)-containing cell-cell adherens junctions (AJs) in HUVECs by enhancing Src-induced VEC internalization and RhoA/ROCK-mediated cellular contraction. STS inhibited Ator-induced Src activation and subsequent VEC internalization and actin depolymerization near cell borders, reducing lesions between neighboring cells and increasing barrier functions. STS also inhibited the Ator-induced RhoA/ROCK-mediated cellular contraction by regulating downstream LIMK/cofilin and MYPT1/MLC phosphatase signaling. These results showed that STS significantly promoted the stability of cell junctions and vascular integrity. Moreover, we observed that regulations of both Src and RhoA/ROCK are required for the maintenance of vascular integrity, and Src inhibitor (PP2) or ROCK inhibitors (fasudil and H1152) alone could not reduce the occurrence Ator-induced ICH. Taken together, we investigated the underlying mechanisms of Ator-induced endothelial instability, and provided scientific evidences of STS as potential ICH therapeutics by promoting vascular integrity.
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Affiliation(s)
- Zhong-Yan Zhou
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China; Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Bin Huang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Shang Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Xiao-Hui Huang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Jing-Yi Tang
- Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Yiu Wa Kwan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
| | - Pui Man Hoi
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China.
| | - Simon Ming-Yuen Lee
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China.
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215
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Yang R, Liu W, Miao L, Yang X, Fu J, Dou B, Cai A, Zong X, Tan C, Chen H, Wang X. Induction of VEGFA and Snail-1 by meningitic Escherichia coli mediates disruption of the blood-brain barrier. Oncotarget 2018; 7:63839-63855. [PMID: 27588479 PMCID: PMC5325408 DOI: 10.18632/oncotarget.11696] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 08/24/2016] [Indexed: 12/20/2022] Open
Abstract
Escherichia coli is the most common Gram-negative bacterium that possesses the ability to cause neonatal meningitis, which develops as circulating bacteria penetrate the blood-brain barrier (BBB). However, whether meningitic E. coli could induce disruption of the BBB and the underlying mechanisms are poorly understood. Our current work highlight for the first time the participation of VEGFA and Snail-1, as well as the potential mechanisms, in meningitic E. coli induced disruption of the BBB. Here, we characterized a meningitis-causing E. coli PCN033, and demonstrated that PCN033 invasion could increase the BBB permeability through downregulating and remodeling the tight junction proteins (TJ proteins). This process required the PCN033 infection-induced upregulation of VEGFA and Snail-1, which involves the activation of TLR2-MAPK-ERK1/2 signaling cascade. Moreover, production of proinflammatory cytokines and chemokines in response to infection also promoted the upregulation of VEGFA and Snail-1, therefore further mediating the BBB disruption. Our observations reported here directly support the involvement of VEGFA and Snail-1 in meningitic E. coli induced BBB disruption, and VEGFA and Snail-1 would therefore represent the essential host targets for future prevention of clinical E. coli meningitis.
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Affiliation(s)
- Ruicheng Yang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Wentong Liu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Ling Miao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Xiaopei Yang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Jiyang Fu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Beibei Dou
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Aoling Cai
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Xin Zong
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Chen Tan
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,Key Laboratory of development of veterinary diagnostic products of Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Huanchun Chen
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,Key Laboratory of development of veterinary diagnostic products of Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Xiangru Wang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,Key Laboratory of development of veterinary diagnostic products of Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070, China
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216
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Lilis I, Giopanou I, Papadaki H, Gyftopoulos K. The expression of p-mTOR and COUP-TFII correlates with increased lymphangiogenesis and lymph node metastasis in prostate adenocarcinoma. Urol Oncol 2018; 36:311.e27-311.e35. [PMID: 29544697 DOI: 10.1016/j.urolonc.2018.02.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 11/23/2017] [Accepted: 02/14/2018] [Indexed: 01/06/2023]
Abstract
BACKGROUND Mammalian target of rapamycin (mTOR) is a central regulator of major cellular processes such as growth and proliferation. Deregulated mTOR signaling is implicated in a wide spectrum of human malignancies including prostate cancer. The aim of this study is to address the role of phosphorylated mTOR (p-mTOR) in prostate adenocarcinoma-induced lymphangiogenesis and lymph node metastasis as well as to investigate its relationship with chicken ovalbumin upstream promoter transcriptional factor 2 (COUP-TFII) and the vascular endothelial growth factors A/C (VEGF A/C). METHODS We analyzed 92 paraffin embedded specimens from patients with prostate cancer who underwent radical prostatectomy with pelvic lymph node (LN) dissection. Twenty-four of these men were pathologically assessed to have regional LN metastasis (pN1 group) and 68 with negative lymph nodes (pN0 group). Lymph vessel density was measured using anti-D2-40 and anti-LYVE-1 antibodies. The expression of p-mTOR, COUP-TFII, and VEGF A/C was also evaluated by immunohistochemistry. RESULTS Specimens from pN1 group exhibited higher cytoplasmic p-mTOR expression compared to pN0 specimens. Mean vessel densities assessed by COUP-TFII and D2-40 were increased in pN1 tumors and positively associated with higher p-mTOR expression. Interestingly, increased expression of p-mTOR was positively associated with COUP-TFII expression in cancer cells and elevated immunoreactivity for both VEGF A and C, which in turn exhibited higher expression in pN1 group. CONCLUSIONS Our findings suggest that increased p-mTOR and COUP-TFII expression are implicated in human prostate adenocarcinoma-induced lymphangiogenesis and LN metastasis.
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Affiliation(s)
- Ioannis Lilis
- Department of Anatomy, Faculty of Medicine, University of Patras, Rio, Achaia, Greece.
| | - Ioanna Giopanou
- Department of Anatomy, Faculty of Medicine, University of Patras, Rio, Achaia, Greece.
| | - Helen Papadaki
- Department of Anatomy, Faculty of Medicine, University of Patras, Rio, Achaia, Greece
| | - Kostis Gyftopoulos
- Department of Anatomy, Faculty of Medicine, University of Patras, Rio, Achaia, Greece
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217
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González-Mariscal L, Raya-Sandino A, González-González L, Hernández-Guzmán C. Relationship between G proteins coupled receptors and tight junctions. Tissue Barriers 2018; 6:e1414015. [PMID: 29420165 DOI: 10.1080/21688370.2017.1414015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Tight junctions (TJs) are sites of cell-cell adhesion, constituted by a cytoplasmic plaque of molecules linked to integral proteins that form a network of strands around epithelial and endothelial cells at the uppermost portion of the lateral membrane. TJs maintain plasma membrane polarity and form channels and barriers that regulate the transit of ions and molecules through the paracellular pathway. This structure that regulates traffic between the external milieu and the organism is affected in numerous pathological conditions and constitutes an important target for therapeutic intervention. Here, we describe how a wide array of G protein-coupled receptors that are activated by diverse stimuli including light, ions, hormones, peptides, lipids, nucleotides and proteases, signal through heterotrimeric G proteins, arrestins and kinases to regulate TJs present in the blood-brain barrier, the blood-retinal barrier, renal tubular cells, keratinocytes, lung and colon, and the slit diaphragm of the glomerulus.
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Affiliation(s)
- Lorenza González-Mariscal
- a Department of Physiology , Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav) , Mexico City , Mexico
| | - Arturo Raya-Sandino
- a Department of Physiology , Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav) , Mexico City , Mexico
| | - Laura González-González
- a Department of Physiology , Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav) , Mexico City , Mexico
| | - Christian Hernández-Guzmán
- a Department of Physiology , Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav) , Mexico City , Mexico
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218
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Zhang X, Wang H, Li Q, Liu Y, Zhao P, Li T. Differences in the expression profiles of claudin proteins in human nasopharyngeal carcinoma compared with non-neoplastic mucosa. Diagn Pathol 2018; 13:11. [PMID: 29402318 PMCID: PMC5800018 DOI: 10.1186/s13000-018-0685-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 01/15/2018] [Indexed: 11/18/2022] Open
Abstract
Background Several studies have suggested that claudin proteins, which are the main components of tight junction structures, are related to the regulation of cell polarity and cell differentiation. Method To explore the expression profiles of the tight junction proteins claudin-2, − 5, − 8 and − 9 in nasopharyngeal carcinoma, IHC (immunohistochemical analysis), Western blot and real-time PCR were used to detect the expression profiles of these claudin proteins in nasopharyngeal carcinoma tissues and in non-neoplastic mucosal tissues. Results According to our study, the expression levels of claudin-2 and claudin-5 were reduced, while the expression of claudin-8 was increased in nasopharyngeal carcinoma tissues in comparison with non-neoplastic mucosal tissues. Correlations between claudin-2 and -5 expression and metastatic progression in nasopharyngeal carcinoma patients were also found. Conclusion In summary, our research reveals distinct expression profiles of claudin-2, − 5 and − 8 in non-neoplastic mucosal tissues and nasopharyngeal carcinoma tissues. In addition, the expression of these claudin proteins was highly correlated with metastatic progression and prognosis in patients with nasopharyngeal carcinoma and had predictive value for the metastasis and survival of nasopharyngeal carcinoma patients.
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Affiliation(s)
- Xiaowei Zhang
- Center for Translational Medicine; Department of Spinal Surgery, Central Hospital of Zibo, Affiliated with Shandong University, Gongqingtuan Road 54Hao, Zibo, Shandong Province, China
| | - Haiming Wang
- Department of General Surgery, People's Hospital of Linzi District, Affiliated with Binzhou Medical College, Shandong Province, China
| | - Qian Li
- Department of Spinal Surgery, Central Hospital of Zibo, Affiliated with Shandong University, Zibo, Shandong Province, China
| | - Yunpeng Liu
- Department of Thoracic Surgery, the First Hospital of Jilin University, Changchun, Jilin, China
| | - Peiqing Zhao
- Center for Translational Medicine; Department of Spinal Surgery, Central Hospital of Zibo, Affiliated with Shandong University, Gongqingtuan Road 54Hao, Zibo, Shandong Province, China
| | - Tao Li
- Center for Translational Medicine; Department of Spinal Surgery, Central Hospital of Zibo, Affiliated with Shandong University, Gongqingtuan Road 54Hao, Zibo, Shandong Province, China.
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219
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Zhang L, Feng T, Spicer LJ. The role of tight junction proteins in ovarian follicular development and ovarian cancer. Reproduction 2018; 155:R183-R198. [PMID: 29374086 DOI: 10.1530/rep-17-0503] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 01/26/2018] [Indexed: 01/01/2023]
Abstract
Tight junctions (TJ) are protein structures that control the transport of water, ions and macromolecules across cell layers. Functions of the transmembrane TJ protein, occluding (OCLN) and the cytoplasmic TJ proteins, tight junction protein 1 (TJP1; also known as zona occludens protein-1), cingulin (CGN) and claudins (CLDN) are reviewed, and current evidence of their role in the ovarian function is reviewed. Abundance of OCLN, CLDNs and TJP1 mRNA changed during follicular growth. In vitro treatment with various growth factors known to affect ovarian folliculogenesis indicated that CGN, OCLN and TJP1 are hormonally regulated. The summarized studies indicate that expression of TJ proteins (i.e., OCLN, CLDN, TJP1 and CGN) changes with follicle size in a variety of vertebrate species but whether these changes in TJ proteins are increased or decreased depends on species and cell type. Evidence indicates that autocrine, paracrine and endocrine regulators, such as fibroblast growth factor-9, epidermal growth factor, androgens, tumor necrosis factor-α and glucocorticoids may modulate these TJ proteins. Additional evidence presented indicates that TJ proteins may be involved in ovarian cancer development in addition to normal follicular and luteal development. A model is proposed suggesting that hormonal downregulation of TJ proteins during ovarian follicular development could reduce barrier function (i.e., selective permeability of molecules between theca and granulosa cells) and allow for an increase in the volume of follicular fluid as well as allow additional serum factors into the follicle that may directly impact granulosa cell functions.
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Affiliation(s)
- Lingna Zhang
- Department of Animal ScienceOklahoma State University, Stillwater, Oklahoma, USA
| | - Tao Feng
- Institute of Animal Husbandry and Veterinary MedicineBeijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Leon J Spicer
- Department of Animal ScienceOklahoma State University, Stillwater, Oklahoma, USA
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220
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Vacca B, Sanchez-Heras E, Steed E, Busson SL, Balda MS, Ohnuma SI, Sasai N, Mayor R, Matter K. Control of neural crest induction by MarvelD3-mediated attenuation of JNK signalling. Sci Rep 2018; 8:1204. [PMID: 29352236 PMCID: PMC5775312 DOI: 10.1038/s41598-018-19579-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 01/04/2018] [Indexed: 12/26/2022] Open
Abstract
Tight junctions are required for the formation of tissue barriers and function as suppressors of signalling mechanisms that control gene expression and cell behaviour; however, little is known about the physiological and developmental importance of such signalling functions. Here, we demonstrate that depletion of MarvelD3, a transmembrane protein of tight junctions, disrupts neural crest formation and, consequently, development of neural crest-derived tissues during Xenopus embryogenesis. Using embryos and explant cultures combined with a small molecule inhibitor or mutant mRNAs, we show that MarvelD3 is required to attenuate JNK signalling during neural crest induction and that inhibition of JNK pathway activation is sufficient to rescue the phenotype induced by MarvelD3 depletion. Direct JNK stimulation disrupts neural crest development, supporting the importance of negative regulation of JNK. Our data identify the junctional protein MarvelD3 as an essential regulator of early vertebrate development and neural crest induction and, thereby, link tight junctions to the control and timing of JNK signalling during early development.
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Affiliation(s)
- Barbara Vacca
- Institute of Ophthalmology, University College London, London, EC1V 9EL, UK
| | | | - Emily Steed
- Institute of Ophthalmology, University College London, London, EC1V 9EL, UK.,Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München, D-81377, Munich, Germany
| | - Sophie L Busson
- Institute of Ophthalmology, University College London, London, EC1V 9EL, UK
| | - Maria S Balda
- Institute of Ophthalmology, University College London, London, EC1V 9EL, UK
| | - Shin-Ichi Ohnuma
- Institute of Ophthalmology, University College London, London, EC1V 9EL, UK
| | - Noriaki Sasai
- Developmental Biomedical Science, Graduate School of Biological Sciences, Nara Institute of Science and Technology (NAIST), 8916-5, Takayama-cho, Ikoma 630-0192, Japan
| | - Roberto Mayor
- Department of Cell and Developmental Biology, University College London, Gower Street, London, WC1E 6BT, UK
| | - Karl Matter
- Institute of Ophthalmology, University College London, London, EC1V 9EL, UK.
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Robinson JM, Henderson WA. Modelling the structure of a ceRNA-theoretical, bipartite microRNA-mRNA interaction network regulating intestinal epithelial cellular pathways using R programming. BMC Res Notes 2018; 11:19. [PMID: 29329594 PMCID: PMC5766989 DOI: 10.1186/s13104-018-3126-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 01/04/2018] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE We report a method using functional-molecular databases and network modelling to identify hypothetical mRNA-miRNA interaction networks regulating intestinal epithelial barrier function. The model forms a data-analysis component of our cell culture experiments, which produce RNA expression data from Nanostring Technologies nCounter® system. The epithelial tight-junction (TJ) and actin cytoskeleton interact as molecular components of the intestinal epithelial barrier. Upstream regulation of TJ-cytoskeleton interaction is effected by the Rac/Rock/Rho signaling pathway and other associated pathways which may be activated or suppressed by extracellular signaling from growth factors, hormones, and immune receptors. Pathway activations affect epithelial homeostasis, contributing to degradation of the epithelial barrier associated with osmotic dysregulation, inflammation, and tumor development. The complexity underlying miRNA-mRNA interaction networks represents a roadblock for prediction and validation of competing-endogenous RNA network function. RESULTS We developed a network model to identify hypothetical co-regulatory motifs in a miRNA-mRNA interaction network related to epithelial function. A mRNA-miRNA interaction list was generated using KEGG and miRWalk2.0 databases. R-code was developed to quantify and visualize inherent network structures. We identified a sub-network with a high number of shared, targeting miRNAs, of genes associated with cellular proliferation and cancer, including c-MYC and Cyclin D.
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Affiliation(s)
- J. M. Robinson
- Digestive Disorder Unit, Biobehavioral Branch, Division of Intramural Research, National Institute of Nursing Research, NIH, DHHS, Bethesda, MD USA
| | - W. A. Henderson
- Digestive Disorder Unit, Biobehavioral Branch, Division of Intramural Research, National Institute of Nursing Research, NIH, DHHS, Bethesda, MD USA
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222
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Essential roles of Akt/Snail pathway in microcystin-LR-induced tight junction toxicity in Sertoli cell. Food Chem Toxicol 2018; 112:290-298. [PMID: 29307602 DOI: 10.1016/j.fct.2018.01.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 01/01/2018] [Accepted: 01/03/2018] [Indexed: 01/17/2023]
Abstract
Microcystin (MC)-LR is a cyclic heptapeptide that acts as a potent reproductive system toxin. However, the underlying pathways of MCLR-induced reproductive system toxicity have not been well elucidated. The blood-testis barrier is mainly constituted by tight junctions (TJs) between adjacent Sertoli cells in the seminiferous epithelium near the basement membrane. The present study was designed to investigate changes in TJs and the underlying pathway in MC-LR-induced TJs toxicity in Sertoli cell. In our study, the transepithelial electrical resistance (TER) value was decreased in a dose dependent manner due to the markers of TJs occludin, claudin and zonula occludens-1 (ZO-1) expression decline. MC-LR is shown to induce cytotoxicity by inhibiting protein phosphatase 2A (PP2A) activity. Our results also showed that the PP2A activity presented a dose-dependent decline. Moreover, MC-LR stimulated protein expression of snail by Akt/GSK-3β activation. The activated Akt/GSK-3β and snail signaling pathway largely accounted for MC-LRinduced TJs toxicity, which could be partially reversed by snail siRNA interference or AKT chemical inhibitor in TM4 cells. These findings indicated that MC-LR inhibit the protein expression of TJs, and the activation of Akt/Snail signaling pathways due to PP2A inhibition is proposed to participate in this process.
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223
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Weidle UH, Dickopf S, Hintermair C, Kollmorgen G, Birzele F, Brinkmann U. The Role of micro RNAs in Breast Cancer Metastasis: Preclinical Validation and Potential Therapeutic Targets. Cancer Genomics Proteomics 2018; 15:17-39. [PMID: 29275360 PMCID: PMC5822183 DOI: 10.21873/cgp.20062] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/05/2017] [Accepted: 11/06/2017] [Indexed: 12/18/2022] Open
Abstract
Despite the approval of several molecular therapies in the last years, breast cancer-associated death ranks as the second highest in women. This is due to metastatic disease, which represents a challenge for treatment. A better understanding of the molecular mechanisms of metastasis is, therefore, of paramount importance. In this review we summarize the role of micro RNAs (miRs) involved in metastasis of breast cancer. We present an overview on metastasis-promoting, -suppressing and context-dependent miRs with both activities. We have categorized the corresponding miRs according to their target classes, interaction with stromal cells or exosomes. The pathways affected by individual miRs are outlined in regard to in vitro properties, activity in metastasis-related in vivo models and clinical significance. Current approaches that may be suitable for therapeutic inhibition or restauration of miR activity are outlined. Finally, we discuss the delivery bottlenecks which present as a major challenge in nucleic acid (miR)-based therapies.
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Affiliation(s)
- Ulrich H Weidle
- Roche Pharma Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | - Steffen Dickopf
- Roche Pharma Research and Early Development, Large Molecule Research, Roche Innovation Center Munich, Penzberg, Germany
| | | | - Gwendlyn Kollmorgen
- Roche Pharma Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | - Fabian Birzele
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, Basel, Switzerland
| | - Ulrich Brinkmann
- Roche Pharma Research and Early Development, Large Molecule Research, Roche Innovation Center Munich, Penzberg, Germany
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224
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Herrero R, Sanchez G, Lorente JA. New insights into the mechanisms of pulmonary edema in acute lung injury. ANNALS OF TRANSLATIONAL MEDICINE 2018; 6:32. [PMID: 29430449 DOI: 10.21037/atm.2017.12.18] [Citation(s) in RCA: 158] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Appearance of alveolar protein-rich edema is an early event in the development of acute respiratory distress syndrome (ARDS). Alveolar edema in ARDS results from a significant increase in the permeability of the alveolar epithelial barrier, and represents one of the main factors that contribute to the hypoxemia in these patients. Damage of the alveolar epithelium is considered a major mechanism responsible for the increased pulmonary permeability, which results in edema fluid containing high concentrations of extravasated macromolecules in the alveoli. The breakdown of the alveolar-epithelial barrier is a consequence of multiple factors that include dysregulated inflammation, intense leukocyte infiltration, activation of pro-coagulant processes, cell death and mechanical stretch. The disruption of tight junction (TJ) complexes at the lateral contact of epithelial cells, the loss of contact between epithelial cells and extracellular matrix (ECM), and relevant changes in the communication between epithelial and immune cells, are deleterious alterations that mediate the disruption of the alveolar epithelial barrier and thereby the formation of lung edema in ARDS.
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Affiliation(s)
- Raquel Herrero
- CIBER de Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain.,Department of Critical Care Medicine, Hospital Universitario de Getafe, Madrid, Spain
| | - Gema Sanchez
- Department of Clinical Analysis, Hospital Universitario de Getafe, Madrid, Spain
| | - Jose Angel Lorente
- CIBER de Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain.,Department of Critical Care Medicine, Hospital Universitario de Getafe, Madrid, Spain.,Universidad Europea de Madrid, Madrid, Spain
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225
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Radeva MY, Waschke J. Mind the gap: mechanisms regulating the endothelial barrier. Acta Physiol (Oxf) 2018; 222. [PMID: 28231640 DOI: 10.1111/apha.12860] [Citation(s) in RCA: 161] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 11/21/2016] [Accepted: 02/16/2017] [Indexed: 12/11/2022]
Abstract
The endothelial barrier consists of intercellular contacts localized in the cleft between endothelial cells, which is covered by the glycocalyx in a sievelike manner. Both types of barrier-forming junctions, i.e. the adherens junction (AJ) serving mechanical anchorage and mechanotransduction and the tight junction (TJ) sealing the intercellular space to limit paracellular permeability, are tethered to the actin cytoskeleton. Under resting conditions, the endothelium thereby builds a selective layer controlling the exchange of fluid and solutes with the surrounding tissue. However, in the situation of an inflammatory response such as in anaphylaxis or sepsis intercellular contacts disintegrate in post-capillary venules leading to intercellular gap formation. The resulting oedema can cause shock and multi-organ failure. Therefore, maintenance as well as coordinated opening and closure of interendothelial junctions is tightly regulated. The two principle underlying mechanisms comprise spatiotemporal activity control of the small GTPases Rac1 and RhoA and the balance of the phosphorylation state of AJ proteins. In the resting state, junctional Rac1 and RhoA activity is enhanced by junctional components, actin-binding proteins, cAMP signalling and extracellular cues such as sphingosine-1-phosphate (S1P) and angiopoietin-1 (Ang-1). In addition, phosphorylation of AJ components is prevented by junction-associated phosphatases including vascular endothelial protein tyrosine phosphatase (VE-PTP). In contrast, inflammatory mediators inhibiting cAMP/Rac1 signalling cause strong activation of RhoA and induce AJ phosphorylation finally leading to endocytosis and cleavage of VE-cadherin. This results in dissolution of TJs the outcome of which is endothelial barrier breakdown.
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Affiliation(s)
- M. Y. Radeva
- Institute of Anatomy and Cell Biology; Ludwig-Maximilians-Universität München; Munich Germany
| | - J. Waschke
- Institute of Anatomy and Cell Biology; Ludwig-Maximilians-Universität München; Munich Germany
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226
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Liu Z, Li L, Chen W, Wang Q, Xiao W, Ma Y, Sheng B, Li X, Sun L, Yu M, Yang H. Aryl hydrocarbon receptor activation maintained the intestinal epithelial barrier function through Notch1 dependent signaling pathway. Int J Mol Med 2017; 41:1560-1572. [PMID: 29286081 PMCID: PMC5819918 DOI: 10.3892/ijmm.2017.3341] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 12/15/2017] [Indexed: 01/12/2023] Open
Abstract
Intestinal ischemia/reperfusion (I/R) induces disruption of the intestinal barrier function. Aryl hydrocarbon receptor (AhR) has a vital role in maintaining the intestinal barrier function. However, the precise mechanism by which AhR maintains intestinal barrier function remains unclear. Notch1 signaling is downstream of AhR, and has also been reported to have a role in the development of tight junctions (TJs) and maintenance of intestinal homeostasis. Therefore, we hypothesized that AhR activation may attenuate the intestinal barrier dysfunction through increased activation of Notch1 signaling. Adult C57BL/6J mice were divided into three groups: Sham, I/R and I/R + 6-formylindolo(3,2-b)carbazole (Ficz) groups. Mice were sacrificed after I/R for 6 h and the intestine was harvested for histological examination, mRNA and protein content analysis, and mucosal permeability investigation. Additionally, a hypoxic Caco‑2 cell culture model was used to evaluate the role of AhR‑Notch1 signaling in the development of TJs and epithelial permeability in vitro. The AhR‑Notch1 signaling components and TJ proteins were assessed by reverse transcription‑quantitative polymerase chain reaction, western blotting, immunohistochemistry or immunofluorescence staining. Epithelial permeability was detected by transepithelium electrical resistance. The data demonstrated that Ficz significantly attenuated the intestinal tissue damage and the disrupted distribution of TJs, increased the expression of TJ proteins, reversed the decrease in TER and upregulated epithelial Notch1 signaling following intestinal I/R in vivo and hypoxia in vitro. Furthermore, inhibition of Notch1 signaling by N‑[N‑(3,5‑difluorophenacetyl)‑L‑alanyl]‑S‑phenylglycine t‑butyl ester (inhibitor of Notch signaling) counteracted the effects of Ficz on the development of TJs in hypoxic Caco‑2 cells. In conclusion, AhR activation ameliorated epithelial barrier dysfunction following intestinal I/R and hypoxia through upregulation of Notch1 signaling, which suggests that AhR may be a potential pharmaceutical agent to combat this condition.
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Affiliation(s)
- Zhongze Liu
- Department of General Surgery, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Liangzi Li
- Department of General Surgery, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Weigang Chen
- Department of General Surgery, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Qimeng Wang
- Department of General Surgery, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Weidong Xiao
- Department of General Surgery, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Yuanhang Ma
- Department of General Surgery, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Baifa Sheng
- Department of General Surgery, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Xiang Li
- Department of General Surgery, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Lihua Sun
- Department of General Surgery, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Min Yu
- Department of General Surgery, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
| | - Hua Yang
- Department of General Surgery, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, P.R. China
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227
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Shimada H, Satohisa S, Kohno T, Takahashi S, Hatakeyama T, Konno T, Tsujiwaki M, Saito T, Kojima T. The roles of tricellular tight junction protein lipolysis-stimulated lipoprotein receptor in malignancy of human endometrial cancer cells. Oncotarget 2017; 7:27735-52. [PMID: 27036040 PMCID: PMC5053684 DOI: 10.18632/oncotarget.8408] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 03/16/2016] [Indexed: 02/07/2023] Open
Abstract
Lipolysis-stimulated lipoprotein receptor (LSR) has been identified as a novel molecular constituent of tricellular contacts that have a barrier function for the cellular sheet. LSR recruits tricellulin (TRIC), which is the first molecular component of tricellular tight junctions. Knockdown of LSR increases cell motility and invasion of certain cancer cells. However, the behavior and the roles of LSR in endometrial cancer remain unknown. In the present study, we investigated the behavior and roles of LSR in normal and endometrial cancer cells in vivo and in vitro. In endometriosis and endometrial cancer, LSR was observed not only in the subapical region but also throughout the lateral region as well as in normal endometrial epithelial cells in the secretory phase, and LSR in the cancer was reduced in correlation with the malignancy. Knockdown of LSR by the siRNA in cells of the endometrial cancer cell line Sawano, induced cell migration, invasion and proliferation, while TRIC relocalized from the tricellular region to the bicellular region at the membrane. In Sawano cells and normal HEEs, a decrease of LSR induced by leptin and an increase of LSR induced by adiponectin and the drugs for type 2 diabetes metformin and berberine were observed via distinct signaling pathways including JAK2/STAT. In Sawano cells, metformin and berberine prevented cell migration and invasion induced by downregulation of LSR by the siRNA and leptin treatment. The dissection of the mechanism in the downregulation of endometrial LSR during obesity is important in developing new diagnostic and therapy for endometrial cancer.
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Affiliation(s)
- Hiroshi Shimada
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, Sapporo, Japan.,Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Seiro Satohisa
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takayuki Kohno
- Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Syunta Takahashi
- Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tsubasa Hatakeyama
- Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takumi Konno
- Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Mitsuhiro Tsujiwaki
- Department of Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tsuyoshi Saito
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takashi Kojima
- Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
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228
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Perez EC, Xander P, Laurindo MFL, Novaes e Brito RR, Vivanco BC, Mortara RA, Mariano M, Lopes JD, Keller AC. The axis IL-10/claudin-10 is implicated in the modulation of aggressiveness of melanoma cells by B-1 lymphocytes. PLoS One 2017; 12:e0187333. [PMID: 29145406 PMCID: PMC5690663 DOI: 10.1371/journal.pone.0187333] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 10/18/2017] [Indexed: 11/18/2022] Open
Abstract
B-1 lymphocytes are known to increase the metastatic potential of B16F10 melanoma cells via the extracellular signal-regulated kinase (ERK) pathway. Since IL-10 is associated with B-1 cells performance, we hypothesized that IL-10 could be implicated in the progression of melanoma. In the present work, we found that the C57BL/6 mice, inoculated with B16F10 cells that were co-cultivated with B-1 lymphocytes from IL-10 knockout mice, developed fewer metastatic nodules than the ones which were injected with the melanoma cells that were cultivated in the presence of wild-type B-1 cells. The impairment of metastatic potential of the B16F10 cells was correlated with low activation of the ERK signaling pathway, supporting the idea that the production of IL-10 by B-1 cells influences the behavior of the tumor. A microarray analysis of the B-1 lymphocytes revealed that IL-10 deficiency is associated with down-regulation of the genes that code for claudin-10, a protein that is involved in cell-to-cell contact and that has been linked to lung adenocarcinoma. In order to determine the impact of claudin-10 in the cross-talk between B-1 lymphocytes and the B16F10 tumor cells, we took advantage of small interfering RNA. The silencing of claudin-10 gene in B-1 lymphocytes inhibited activation of the ERK pathway and abrogated the B-1-induced aggressive behavior of the B16F10 cells. Thus, our findings suggest that the axis IL-10/claudin-10 is a promising target for the development of therapeutic agents against aggressive melanoma.
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Affiliation(s)
- Elizabeth Cristina Perez
- Environmental and Experimental Pathology Program, Universidade Paulista, São Paulo, São Paulo, Brazil
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo—Escola Paulista de Medicina (UNIFESP/EPM), São Paulo, São Paulo, Brazil
| | - Patricia Xander
- Department of Pharmaceutics Sciences, Universidade Federal de São Paulo, Campus Diadema, Diadema São Paulo, Brazil
| | - Maria Fernanda Lucatelli Laurindo
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo—Escola Paulista de Medicina (UNIFESP/EPM), São Paulo, São Paulo, Brazil
| | | | - Bruno Camolese Vivanco
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo—Escola Paulista de Medicina (UNIFESP/EPM), São Paulo, São Paulo, Brazil
| | - Renato Arruda Mortara
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo—Escola Paulista de Medicina (UNIFESP/EPM), São Paulo, São Paulo, Brazil
| | - Mario Mariano
- Environmental and Experimental Pathology Program, Universidade Paulista, São Paulo, São Paulo, Brazil
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo—Escola Paulista de Medicina (UNIFESP/EPM), São Paulo, São Paulo, Brazil
| | - José Daniel Lopes
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo—Escola Paulista de Medicina (UNIFESP/EPM), São Paulo, São Paulo, Brazil
| | - Alexandre Castro Keller
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo—Escola Paulista de Medicina (UNIFESP/EPM), São Paulo, São Paulo, Brazil
- Department of Medicine, Nephrology Division, Universidade Federal de São Paulo–Escola Paulista de Medicina (UNIFESP/EPM), São Paulo, São Paulo, Brazil
- * E-mail: ,
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229
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Rübsam M, Mertz AF, Kubo A, Marg S, Jüngst C, Goranci-Buzhala G, Schauss AC, Horsley V, Dufresne ER, Moser M, Ziegler W, Amagai M, Wickström SA, Niessen CM. E-cadherin integrates mechanotransduction and EGFR signaling to control junctional tissue polarization and tight junction positioning. Nat Commun 2017; 8:1250. [PMID: 29093447 PMCID: PMC5665913 DOI: 10.1038/s41467-017-01170-7] [Citation(s) in RCA: 126] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 08/24/2017] [Indexed: 11/09/2022] Open
Abstract
Generation of a barrier in multi-layered epithelia like the epidermis requires restricted positioning of functional tight junctions (TJ) to the most suprabasal viable layer. This positioning necessitates tissue-level polarization of junctions and the cytoskeleton through unknown mechanisms. Using quantitative whole-mount imaging, genetic ablation, and traction force microscopy and atomic force microscopy, we find that ubiquitously localized E-cadherin coordinates tissue polarization of tension-bearing adherens junction (AJ) and F-actin organization to allow formation of an apical TJ network only in the uppermost viable layer. Molecularly, E-cadherin localizes and tunes EGFR activity and junctional tension to inhibit premature TJ complex formation in lower layers while promoting increased tension and TJ stability in the granular layer 2. In conclusion, our data identify an E-cadherin-dependent mechanical circuit that integrates adhesion, contractile forces and biochemical signaling to drive the polarized organization of junctional tension necessary to build an in vivo epithelial barrier.
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Affiliation(s)
- Matthias Rübsam
- Department of Dermatology, University of Cologne, Cologne, 50931, Germany
- Cologne Excellence Cluster for Stress Responses in Ageing-associated diseases (CECAD), Cologne, 50931, Germany
- Center for Molecular Medicine Cologne (CMMC) University of Cologne, Cologne, 50931, Germany
| | - Aaron F Mertz
- Department of Physics, Yale University, New Haven, CT, 06520, USA
- Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY, 10065, USA
| | - Akiharu Kubo
- Department of Dermatology, Keio University School of Medicine, Tokyo, 160-8582, Japan
| | - Susanna Marg
- Hannover Medical School, 30625, Hannover, Germany
| | - Christian Jüngst
- Cologne Excellence Cluster for Stress Responses in Ageing-associated diseases (CECAD), Cologne, 50931, Germany
| | - Gladiola Goranci-Buzhala
- Department of Dermatology, University of Cologne, Cologne, 50931, Germany
- Cologne Excellence Cluster for Stress Responses in Ageing-associated diseases (CECAD), Cologne, 50931, Germany
- Center for Molecular Medicine Cologne (CMMC) University of Cologne, Cologne, 50931, Germany
| | - Astrid C Schauss
- Cologne Excellence Cluster for Stress Responses in Ageing-associated diseases (CECAD), Cologne, 50931, Germany
| | - Valerie Horsley
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT, 06520, USA
| | - Eric R Dufresne
- Department of Physics, Yale University, New Haven, CT, 06520, USA
- Departments of Mechanical Engineering and Materials Science, Chemical and Environmental Engineering, and Cell Biology, Yale University, New Haven, CT, 06520, USA
| | - Markus Moser
- Max Planck Institute for Biochemistry, Am Klopferspitz 18, Martinsried, 82152, Germany
| | | | - Masayuki Amagai
- Department of Dermatology, Keio University School of Medicine, Tokyo, 160-8582, Japan
| | - Sara A Wickström
- Cologne Excellence Cluster for Stress Responses in Ageing-associated diseases (CECAD), Cologne, 50931, Germany
- Paul Gerson Unna Group 'Skin Homeostasis and Ageing', Max Planck Institute for Biology of Ageing, Cologne, 50931, Germany
| | - Carien M Niessen
- Department of Dermatology, University of Cologne, Cologne, 50931, Germany.
- Cologne Excellence Cluster for Stress Responses in Ageing-associated diseases (CECAD), Cologne, 50931, Germany.
- Center for Molecular Medicine Cologne (CMMC) University of Cologne, Cologne, 50931, Germany.
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230
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Liu Z, Zou D, Yang X, Xue X, Zuo L, Zhou Q, Hu R, Wang Y. Melatonin inhibits colon cancer RKO cell migration by downregulating Rho‑associated protein kinase expression via the p38/MAPK signaling pathway. Mol Med Rep 2017; 16:9383-9392. [PMID: 29152648 PMCID: PMC5779993 DOI: 10.3892/mmr.2017.7836] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 08/25/2017] [Indexed: 01/05/2023] Open
Abstract
Melatonin is predominately produced and secreted by the pineal gland, and inhibits cell growth in various cancer cell lines such as colorectal cancer. However, the precise mechanisms involved have not been fully elucidated. In the present study, the potential molecular mechanism underlying the efficacy of melatonin on migration in RKO colon cancer cells was investigated. The effects of melatonin and H-1152, a selective inhibitor of Rho-associated protein kinase (ROCK), on the migration of RKO cells were analyzed by an in vitro wound healing assay. The localization of zonula occludens-1 (ZO-1) and occludin were observed by immunofluorescence. Reverse transcription-quantitative polymerase chain reaction (qPCR) was performed to analyze the relative mRNA levels of ROCK, ZO-1 and occludin. In addition, western blot analysis was implemented to examine the expression of ROCK, phospho (p)-myosin phosphatase targeting subunit 1 (MYPT1), p-myosin light chains (MLC) and p-p38. The results revealed that the expression levels of ROCK2, p-MYPT1 and p-MLC in RKO cells were decreased, and the membrane protein expression of ZO-1 and occludin increased when the cells were treated with melatonin. qPCR demonstrated that melatonin downregulated ROCK2 gene expression, and upregulated the expression of the ZO-1 and occludin genes. The levels of ZO-1 and occludin localized in the tight junctions were markedly increased in the immunofluorescence assay. In addition, the phosphorylation levels of p38 were reduced when the cells were treated with melatonin, and treatment with H-1152 downregulated p38 phosphorylation. The results indicated that melatonin may inhibit the migration of RKO colon cancer cells by downregulating ROCK expression via the p38/mitogen-activated protein kinase signaling pathway.
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Affiliation(s)
- Zhen Liu
- Laboratory of Molecular Biology, and Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Duobing Zou
- Laboratory of Stem Cell Transplantation, Ningbo First Hospital, Ningbo, Zhejiang 315000, P.R. China
| | - Xiaoping Yang
- Laboratory of Molecular Biology, and Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Xiaolong Xue
- Laboratory of Molecular Biology, and Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Li Zuo
- Laboratory of Molecular Biology, and Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Qing Zhou
- Laboratory of Molecular Biology, and Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Ruolei Hu
- Laboratory of Molecular Biology, and Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Yuan Wang
- Laboratory of Molecular Biology, and Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
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231
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Jiang X, Andjelkovic AV, Zhu L, Yang T, Bennett MVL, Chen J, Keep RF, Shi Y. Blood-brain barrier dysfunction and recovery after ischemic stroke. Prog Neurobiol 2017; 163-164:144-171. [PMID: 28987927 DOI: 10.1016/j.pneurobio.2017.10.001] [Citation(s) in RCA: 551] [Impact Index Per Article: 78.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 05/30/2017] [Accepted: 10/02/2017] [Indexed: 01/06/2023]
Abstract
The blood-brain barrier (BBB) plays a vital role in regulating the trafficking of fluid, solutes and cells at the blood-brain interface and maintaining the homeostatic microenvironment of the CNS. Under pathological conditions, such as ischemic stroke, the BBB can be disrupted, followed by the extravasation of blood components into the brain and compromise of normal neuronal function. This article reviews recent advances in our knowledge of the mechanisms underlying BBB dysfunction and recovery after ischemic stroke. CNS cells in the neurovascular unit, as well as blood-borne peripheral cells constantly modulate the BBB and influence its breakdown and repair after ischemic stroke. The involvement of stroke risk factors and comorbid conditions further complicate the pathogenesis of neurovascular injury by predisposing the BBB to anatomical and functional changes that can exacerbate BBB dysfunction. Emphasis is also given to the process of long-term structural and functional restoration of the BBB after ischemic injury. With the development of novel research tools, future research on the BBB is likely to reveal promising potential therapeutic targets for protecting the BBB and improving patient outcome after ischemic stroke.
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Affiliation(s)
- Xiaoyan Jiang
- Pittsburgh Institute of Brain Disorders & Recovery and Department of Neurology, University of Pittsburgh, Pittsburgh, PA 15213, USA; State Key Laboratory of Medical Neurobiology, Institute of Brain Sciences and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai 200032, China
| | | | - Ling Zhu
- Pittsburgh Institute of Brain Disorders & Recovery and Department of Neurology, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Tuo Yang
- Pittsburgh Institute of Brain Disorders & Recovery and Department of Neurology, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Michael V L Bennett
- State Key Laboratory of Medical Neurobiology, Institute of Brain Sciences and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai 200032, China; Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Jun Chen
- Pittsburgh Institute of Brain Disorders & Recovery and Department of Neurology, University of Pittsburgh, Pittsburgh, PA 15213, USA; State Key Laboratory of Medical Neurobiology, Institute of Brain Sciences and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai 200032, China
| | - Richard F Keep
- Department of Neurosurgery, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Yejie Shi
- Pittsburgh Institute of Brain Disorders & Recovery and Department of Neurology, University of Pittsburgh, Pittsburgh, PA 15213, USA.
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232
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Xu X, Jia X, Mo L, Liu C, Zheng L, Yuan Q, Zhou X. Intestinal microbiota: a potential target for the treatment of postmenopausal osteoporosis. Bone Res 2017; 5:17046. [PMID: 28983411 PMCID: PMC5627629 DOI: 10.1038/boneres.2017.46] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 07/24/2017] [Indexed: 02/08/2023] Open
Abstract
Postmenopausal osteoporosis (PMO) is a prevalent metabolic bone disease characterized by bone loss and structural destruction, which increases the risk of fracture in postmenopausal women. Owing to the high morbidity and serious complications of PMO, many efforts have been devoted to its prophylaxis and treatment. The intestinal microbiota is the complex community of microorganisms colonizing the gastrointestinal tract. Probiotics, which are dietary or medical supplements consisting of beneficial intestinal bacteria, work in concert with endogenous intestinal microorganisms to maintain host health. Recent studies have revealed that bone loss in PMO is closely related to host immunity, which is influenced by the intestinal microbiota. The curative effects of probiotics on metabolic bone diseases have also been demonstrated. The effects of the intestinal microbiota on bone metabolism suggest a promising target for PMO management. This review seeks to summarize the critical effects of the intestinal microbiota and probiotics on PMO, with a focus on the molecular mechanisms underlying the pathogenic relationship between bacteria and host, and to define the possible treatment options.
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Affiliation(s)
- Xin Xu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiaoyue Jia
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Longyi Mo
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Chengcheng Liu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Liwei Zheng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Quan Yuan
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Dental Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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233
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Van Sebille YZ, Gibson RJ, Wardill HR, Ball IA, Keefe DM, Bowen JM. Dacomitinib-induced diarrhea: Targeting chloride secretion with crofelemer. Int J Cancer 2017; 142:369-380. [DOI: 10.1002/ijc.31048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 08/21/2017] [Accepted: 08/31/2017] [Indexed: 12/13/2022]
Affiliation(s)
| | | | - Hannah R. Wardill
- Discipline of Physiology; Adelaide Medical School, University of Adelaide; Australia
| | - Imogen A. Ball
- Discipline of Physiology; Adelaide Medical School, University of Adelaide; Australia
| | - Dorothy M.K. Keefe
- Discipline of Physiology; Adelaide Medical School, University of Adelaide; Australia
| | - Joanne M. Bowen
- Discipline of Physiology; Adelaide Medical School, University of Adelaide; Australia
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234
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Yu H, Wang C, Wang X, Wang H, Zhang C, You J, Wang P, Feng C, Xu G, Zhao R, Wu X, Zhang G. Long-term exposure to ethanol downregulates tight junction proteins through the protein kinase Cα signaling pathway in human cerebral microvascular endothelial cells. Exp Ther Med 2017; 14:4789-4796. [PMID: 29201181 PMCID: PMC5704308 DOI: 10.3892/etm.2017.5180] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 07/28/2017] [Indexed: 12/21/2022] Open
Abstract
Brain microvascular endothelial cells (BMECs) are the primary component of the blood-brain barrier (BBB). Tight junction (TJ) proteins, including claudin, occludin and zonula occludens (ZO)-1, ZO-2 and ZO-3, maintain the structural integrity of BMECs. Ethanol activates the assembly and disassembly of TJs, which is a process that is regulated by protein kinase C (PKC). In addition, ethanol treatment leads to the loss of structural integrity, which damages the permeability of the BBB and subsequently affects central nervous system homeostasis, thus allowing additional substances to enter the brain. However, the mechanisms underlying ethanol-induced loss of BBB structure remain unknown. It has been hypothesized that long-term exposure to ethanol reduces the expression of claudin-5, occludin and ZO-1 via the PKC signaling pathway, thereby affecting BBB structural integrity. In the current study, the human cerebral microvascular endothelial cell line, HCMEC/D3, was treated with 50, 100, 200 and 400 mM ethanol for 24, 48 and 72 h. Cell viability was determined using an MTS assay. The expression of claudin-5, occludin and ZO-1 protein and mRNA was measured using western blot analysis and reverse transcription-quantitative polymerase chain reaction, respectively. Following the pretreatment of HCMEC/D3 cells with the PKCα-specific inhibitor, safingol (10 µmol/l), the expression of claudin-5, occludin, ZO-1 and phosphorylated (p)-PKCα was measured using western blot analysis, and PKCα localization was determined by immunofluorescence. With increasing concentrations of ethanol, the expression of claudin-5, occludin and ZO-1 protein decreased, while the expression of claudin-5, occludin and ZO-1 mRNA increased. Exposure to ethanol significantly increased the expression of p-PKCα, whereas no significant effect on the expression of PKCα was observed. Following 48 h treatment with 200 mM ethanol, the expression of claudin-5, occludin and ZO-1 protein was significantly decreased when compared with the control. By contrast, the expression of p-PKCα was increased, and increased translocation of PKCα from the cytoplasm to the nuclear membrane and nucleus was observed. In addition, the results demonstrated that safingol significantly reversed these effects of ethanol. In conclusion, long-term exposure to ethanol downregulates the expression of claudin-5, occludin and ZO-1 protein in HCMEC/D3 s, and this effect may be mediated via activation of PKCα.
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Affiliation(s)
- Hao Yu
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Changliang Wang
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Xiaolong Wang
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Hongbo Wang
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Chunan Zhang
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Jiabin You
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Pengfei Wang
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Chunmei Feng
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Guohui Xu
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Rui Zhao
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Xu Wu
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Guohua Zhang
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, P.R. China
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235
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Loxham M, Davies DE. Phenotypic and genetic aspects of epithelial barrier function in asthmatic patients. J Allergy Clin Immunol 2017; 139:1736-1751. [PMID: 28583446 PMCID: PMC5457128 DOI: 10.1016/j.jaci.2017.04.005] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/13/2017] [Accepted: 04/14/2017] [Indexed: 12/22/2022]
Abstract
The bronchial epithelium is continuously exposed to a multitude of noxious challenges in inhaled air. Cellular contact with most damaging agents is reduced by the action of the mucociliary apparatus and by formation of a physical barrier that controls passage of ions and macromolecules. In conjunction with these defensive barrier functions, immunomodulatory cross-talk between the bronchial epithelium and tissue-resident immune cells controls the tissue microenvironment and barrier homeostasis. This is achieved by expression of an array of sensors that detect a wide variety of viral, bacterial, and nonmicrobial (toxins and irritants) agents, resulting in production of many different soluble and cell-surface molecules that signal to cells of the immune system. The ability of the bronchial epithelium to control the balance of inhibitory and activating signals is essential for orchestrating appropriate inflammatory and immune responses and for temporally modulating these responses to limit tissue injury and control the resolution of inflammation during tissue repair. In asthmatic patients abnormalities in many aspects of epithelial barrier function have been identified. We postulate that such abnormalities play a causal role in immune dysregulation in the airways by translating gene-environment interactions that underpin disease pathogenesis and exacerbation.
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Affiliation(s)
- Matthew Loxham
- Clinical and Experimental Sciences and the Southampton NIHR Respiratory Biomedical Research Unit, University of Southampton Faculty of Medicine, Sir Henry Wellcome Laboratories, University Hospital Southampton, Southampton, United Kingdom
| | - Donna E Davies
- Clinical and Experimental Sciences and the Southampton NIHR Respiratory Biomedical Research Unit, University of Southampton Faculty of Medicine, Sir Henry Wellcome Laboratories, University Hospital Southampton, Southampton, United Kingdom.
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236
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Abstract
The claudin family of tetraspan transmembrane proteins is essential for tight junction formation and regulation of paracellular transport between epithelial cells. Claudins also play a role in apical-basal cell polarity, cell adhesion and link the tight junction to the actin cytoskeleton to exert effects on cell shape. The function of claudins in paracellular transport has been extensively studied through loss-of-function and gain-of-function studies in cell lines and in animal models, however, their role in morphogenesis has been less appreciated. In this review, we will highlight the importance of claudins during morphogenesis by specifically focusing on their critical functions in generating epithelial tubes, lumens, and tubular networks during organ formation.
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Affiliation(s)
- Amanda I Baumholtz
- a Department of Human Genetics , McGill University , Montréal , Québec , Canada.,b The Research Institute of the McGill University Health Centre , Montréal , Québec , Canada
| | - Indra R Gupta
- a Department of Human Genetics , McGill University , Montréal , Québec , Canada.,b The Research Institute of the McGill University Health Centre , Montréal , Québec , Canada.,c Department of Pediatrics , McGill University , Montréal , Québec , Canada
| | - Aimee K Ryan
- a Department of Human Genetics , McGill University , Montréal , Québec , Canada.,b The Research Institute of the McGill University Health Centre , Montréal , Québec , Canada.,c Department of Pediatrics , McGill University , Montréal , Québec , Canada
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237
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Khakshour S, Labrecque MP, Esmaeilsabzali H, Lee FJS, Cox ME, Park EJ, Beischlag TV. Retinoblastoma protein (Rb) links hypoxia to altered mechanical properties in cancer cells as measured by an optical tweezer. Sci Rep 2017; 7:7833. [PMID: 28798482 PMCID: PMC5552853 DOI: 10.1038/s41598-017-07947-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 07/06/2017] [Indexed: 12/18/2022] Open
Abstract
Hypoxia modulates actin organization via multiple pathways. Analyzing the effect of hypoxia on the biophysical properties of cancer cells is beneficial for studying modulatory signalling pathways by quantifying cytoskeleton rearrangements. We have characterized the biophysical properties of human LNCaP prostate cancer cells that occur in response to loss of the retinoblastoma protein (Rb) under hypoxic stress using an oscillating optical tweezer. Hypoxia and Rb-loss increased cell stiffness in a fashion that was dependent on activation of the extracellular signal-regulated kinase (ERK) and the protein kinase B (AKT)- mammalian target of rapamycin (MTOR) pathways. Pharmacological inhibition of MEK1/2, AKT or MTOR impeded hypoxia-inducible changes in the actin cytoskeleton and inhibited cell migration in Rb-deficient cells conditioned with hypoxia. These results suggest that loss of Rb in transformed hypoxic cancer cells affects MEK1/2-ERK/AKT-MTOR signalling and promotes motility. Thus, the mechanical characterization of cancer cells using an optical tweezer provides an additional technique for cancer diagnosis/prognosis and evaluating therapeutic performance.
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Affiliation(s)
- S Khakshour
- School of Mechatronic Systems Engineering, Faculty of Applied Sciences, Simon Fraser University, Surrey, BC, Canada
| | - M P Labrecque
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - H Esmaeilsabzali
- School of Mechatronic Systems Engineering, Faculty of Applied Sciences, Simon Fraser University, Surrey, BC, Canada
| | - F J S Lee
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - M E Cox
- Department of Urologic Sciences, The Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - E J Park
- School of Mechatronic Systems Engineering, Faculty of Applied Sciences, Simon Fraser University, Surrey, BC, Canada. .,Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, Canada.
| | - T V Beischlag
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, Canada.
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238
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Ogundele OM, Rosa FA, Dharmakumar R, Lee CC, Francis J. Systemic Sympathoexcitation Was Associated with Paraventricular Hypothalamic Phosphorylation of Synaptic CaMKIIα and MAPK/ErK. Front Neurosci 2017; 11:447. [PMID: 28824368 PMCID: PMC5541931 DOI: 10.3389/fnins.2017.00447] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 07/21/2017] [Indexed: 01/16/2023] Open
Abstract
Systemic administration of adrenergic agonist (Isoproterenol; ISOP) is known to facilitate cardiovascular changes associated with heart failure through an upregulation of cardiac toll-like receptor 4 (TLR4). Furthermore, previous studies have shown that cardiac tissue-specific deletion of TLR4 protects the heart against such damage. Since the autonomic regulation of systemic cardiovascular function originates from pre-autonomic sympathetic centers in the brain, it is unclear how a systemically driven sympathetic change may affect the pre-autonomic paraventricular hypothalamic nuclei (PVN) TLR4 expression. Here, we examined how change in PVN TLR4 was associated with alterations in the neurochemical cytoarchitecture of the PVN in systemic adrenergic activation. After 48 h of intraperitoneal 150 mg/kg ISOP treatment, there was a change in PVN CaMKIIα and MAPK/ErK expression, and an increase in TLR4 in expression. This was seen as an increase in p-MAPK/ErK, and a decrease in synaptic CaMKIIα expression in the PVN (p < 0.01) of ISOP treated mice. Furthermore, there was an upregulation of vesicular glutamate transporter (VGLUT 2; p < 0.01) and a decreased expression of GABA in the PVN of Isoproterenol (ISOP) treated WT mice (p < 0.01). However, after a PVN-specific knockdown of TLR4, the effect of systemic administration of ISOP was attenuated, as indicated by a decrease in p-MAPK/ErK (p < 0.01) and upregulation of CaMKIIα (p < 0.05). Additionally, loss of inhibitory function was averted while VGLUT2 expression decreased when compared with the ISOP treated wild type mice and the control. Taken together, the outcome of this study showed that systemic adrenergic activation may alter the expression, and phosphorylation of preautonomic MAPK/ErK and CaMKIIα downstream of TLR4. As such, by outlining the roles of these kinases in synaptic function, we have identified the significance of neural TLR4 in the progression, and attenuation of synaptic changes in the pre-autonomic sympathetic centers.
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Affiliation(s)
- Olalekan M Ogundele
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary MedicineBaton Rouge, LA, United States
| | - Fernando A Rosa
- Departamento de Clínica, Cirurgia e Reprodução Animal, Faculdade de Medicina Veterinária, Universidade Estadual PaulistaAraçatuba, Brazil
| | - Rohan Dharmakumar
- Department of Biomedical Sciences, Cedars-Sinai Medical Center Biomedical Imaging Research InstituteLos Angeles, CA, United States
| | - Charles C Lee
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary MedicineBaton Rouge, LA, United States
| | - Joseph Francis
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary MedicineBaton Rouge, LA, United States
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239
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Multiplex epithelium dysfunction due to CLDN10 mutation: the HELIX syndrome. Genet Med 2017; 20:190-201. [PMID: 28771254 DOI: 10.1038/gim.2017.71] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 04/11/2017] [Indexed: 01/28/2023] Open
Abstract
PurposeWe aimed to identify the genetic cause to a clinical syndrome encompassing hypohidrosis, electrolyte imbalance, lacrimal gland dysfunction, ichthyosis, and xerostomia (HELIX syndrome), and to comprehensively delineate the phenotype.MethodsWe performed homozygosity mapping, whole-genome sequencing, gene sequencing, expression studies, functional tests, protein bioinformatics, and histological characterization in two unrelated families with HELIX syndrome.ResultsWe identified biallelic missense mutations (c.386C>T, p.S131L and c.2T>C, p.M1T) in CLDN10B in six patients from two unrelated families. CLDN10B encodes Claudin-10b, an integral tight junction (TJ) membrane-spanning protein expressed in the kidney, skin, and salivary glands. All patients had hypohidrosis, renal loss of NaCl with secondary hyperaldosteronism and hypokalemia, as well as hypolacrymia, ichthyosis, xerostomia, and severe enamel wear. Functional testing revealed that patients had a decreased NaCl absorption in the thick ascending limb of the loop of Henle and a severely decreased secretion of saliva. Both mutations resulted in reduced or absent Claudin-10 at the plasma membrane of epithelial cells.ConclusionCLDN10 mutations cause a dysfunction in TJs in several tissues and, subsequently, abnormalities in renal ion transport, ectodermal gland homeostasis, and epidermal integrity.
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240
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Lahey KA, Ronaghan NJ, Shang J, Dion SP, Désilets A, Leduc R, MacNaughton WK. Signaling pathways induced by serine proteases to increase intestinal epithelial barrier function. PLoS One 2017; 12:e0180259. [PMID: 28671992 PMCID: PMC5495298 DOI: 10.1371/journal.pone.0180259] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 06/13/2017] [Indexed: 12/30/2022] Open
Abstract
Changes in barrier function of the gastrointestinal tract are thought to contribute to the inflammatory bowel diseases Crohn's disease and ulcerative colitis. Previous work in our lab demonstrated that apical exposure of intestinal epithelial cell lines to serine proteases results in an increase in transepithelial electrical resistance (TER). However, the underlying mechanisms governing this response are unclear. We aimed to determine the requirement for proteolytic activity, epidermal growth factor receptor (EGFR) activation, and downstream intracellular signaling in initiating and maintaining enhanced barrier function following protease treatment using a canine intestinal epithelial cell line (SCBN). We also examined the role of phosphorylation of myosin regulatory light chain on the serine protease-induced increase in TER through. It was found that proteolytic activity of the serine proteases trypsin and matriptase is required to initiate and maintain the protease-mediated increase in TER. We also show that MMP-independent EGFR activation is essential to the sustained phase of the protease response, and that Src kinases may mediate EGFR transactivation. PI3-K and ERK1/2 signaling were important in reaching a maximal increase in TER following protease stimulation; however, their upstream activators are yet to be determined. CK2 inhibition prevented the increase in TER induced by serine proteases. The bradykinin B(2) receptor was not involved in the change in TER in response to serine proteases, and no change in phosphorylation of MLC was observed after trypsin or matriptase treatment. Taken together, our data show a requirement for ongoing proteolytic activity, EGFR transactivation, as well as downstream PI3-K, ERK1/2, and CK2 signaling in protease-mediated barrier enhancement of intestinal epithelial cells. The pathways mediating enhanced barrier function by proteases may be novel therapeutic targets for intestinal disorders characterized by disrupted epithelial barrier function.
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Affiliation(s)
- Kelcie A. Lahey
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
| | - Natalie J. Ronaghan
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
| | - Judie Shang
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
| | - Sébastien P. Dion
- Département de Pharmacologie, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Antoine Désilets
- Département de Pharmacologie, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Richard Leduc
- Département de Pharmacologie, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Wallace K. MacNaughton
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
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241
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Garcia-Polite F, Martorell J, Del Rey-Puech P, Melgar-Lesmes P, O’Brien CC, Roquer J, Ois A, Principe A, Edelman ER, Balcells M. Pulsatility and high shear stress deteriorate barrier phenotype in brain microvascular endothelium. J Cereb Blood Flow Metab 2017; 37:2614-2625. [PMID: 27702879 PMCID: PMC5531355 DOI: 10.1177/0271678x16672482] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 08/17/2016] [Accepted: 09/08/2016] [Indexed: 12/30/2022]
Abstract
Microvascular endothelial cells at the blood-brain barrier exhibit a protective phenotype, which is highly induced by biochemical and biomechanical stimuli. Amongst them, shear stress enhances junctional tightness and limits transport at capillary-like levels. Abnormal flow patterns can reduce functional features of macrovascular endothelium. We now examine if this is true in brain microvascular endothelial cells. We suggest in this paper a complex response of endothelial cells to aberrant forces under different flow domains. Human brain microvascular endothelial cells were exposed to physiological or abnormal flow patterns. Physiologic shear (10-20 dyn/cm2) upregulates expression of tight junction markers Zona Occludens 1 (1.7-fold) and Claudin-5 (more than 2-fold). High shear stress (40 dyn/cm2) and/or pulsatility decreased their expression to basal levels and altered junctional morphology. We exposed cells to pathological shear stress patterns followed by capillary-like conditions. Results showed reversible recovery on the expression of tight junction markers. Flow protection of barrier phenotype commensurate with junctional signaling pathways decrease (Src, 0.25-fold, ERK, 0.77-fold) when compared to static conditions. This decrease was lost under high shear and pulsatile flow. In conclusion, abnormal shear stress inherent to systemic vascular disease leads to barrier impairment, which could be reverted by hemodynamic interventions.
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Affiliation(s)
- Fernando Garcia-Polite
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA
- IQS School of Engineering, Universitat Ramon Llull, Barcelona, Spain
| | - Jordi Martorell
- IQS School of Engineering, Universitat Ramon Llull, Barcelona, Spain
| | - Paula Del Rey-Puech
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA
- IQS School of Engineering, Universitat Ramon Llull, Barcelona, Spain
| | - Pedro Melgar-Lesmes
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Caroline C O’Brien
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Jaume Roquer
- Servei de Neurologia, Hospital del Mar, Institut Hospital del Mar d’Investigacions Mèdiques, Barcelona, Spain
- Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Angel Ois
- Servei de Neurologia, Hospital del Mar, Institut Hospital del Mar d’Investigacions Mèdiques, Barcelona, Spain
- Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Alessandro Principe
- Servei de Neurologia, Hospital del Mar, Institut Hospital del Mar d’Investigacions Mèdiques, Barcelona, Spain
- Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Elazer R Edelman
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA
- Cardiovascular Division, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Mercedes Balcells
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA
- IQS School of Engineering, Universitat Ramon Llull, Barcelona, Spain
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242
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Auger JP, Gottschalk M. The Streptococcus suis factor H-binding protein: A key to unlocking the blood-brain barrier and access the central nervous system? Virulence 2017. [PMID: 28622084 DOI: 10.1080/21505594.2017.1342027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Affiliation(s)
- Jean-Philippe Auger
- a Streptococcus suis Research Laboratory, Research Group on Infectious Diseases in Production Animals (GREMIP) & Swine and Poultry Infectious Diseases Research Center (CRIPA), Faculty of Veterinary Medicine , University of Montreal , St-Hyacinthe , QC , Canada
| | - Marcelo Gottschalk
- a Streptococcus suis Research Laboratory, Research Group on Infectious Diseases in Production Animals (GREMIP) & Swine and Poultry Infectious Diseases Research Center (CRIPA), Faculty of Veterinary Medicine , University of Montreal , St-Hyacinthe , QC , Canada
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243
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Nakahara T, Nishitani Y, Nishiumi S, Yoshida M, Azuma T. Astilbin from Engelhardtia chrysolepis enhances intestinal barrier functions in Caco-2 cell monolayers. Eur J Pharmacol 2017; 804:46-51. [DOI: 10.1016/j.ejphar.2017.03.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 03/16/2017] [Accepted: 03/17/2017] [Indexed: 01/13/2023]
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244
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Ma Y, Yue J, Zhang Y, Shi C, Odenwald M, Liang WG, Wei Q, Goel A, Gou X, Zhang J, Chen SY, Tang WJ, Turner JR, Yang F, Liang H, Qin H, Wu X. ACF7 regulates inflammatory colitis and intestinal wound response by orchestrating tight junction dynamics. Nat Commun 2017; 8:15375. [PMID: 28541346 PMCID: PMC5458510 DOI: 10.1038/ncomms15375] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 03/16/2017] [Indexed: 12/12/2022] Open
Abstract
In the intestinal epithelium, the aberrant regulation of cell/cell junctions leads to intestinal barrier defects, which may promote the onset and enhance the severity of inflammatory bowel disease (IBD). However, it remains unclear how the coordinated behaviour of cytoskeletal network may contribute to cell junctional dynamics. In this report, we identified ACF7, a crosslinker of microtubules and F-actin, as an essential player in this process. Loss of ACF7 leads to aberrant microtubule organization, tight junction stabilization and impaired wound closure in vitro. With the mouse genetics approach, we show that ablation of ACF7 inhibits intestinal wound healing and greatly increases susceptibility to experimental colitis in mice. ACF7 level is also correlated with development and progression of ulcerative colitis (UC) in human patients. Together, our results reveal an important molecular mechanism whereby coordinated cytoskeletal dynamics contributes to cell adhesion regulation during intestinal wound repair and the development of IBD. The cytoskeleton plays a key role in cell/cell junction formation, but how the coordinated behaviour of the cytoskeleton contributes is not known. Here the authors show that actin-microtubule crosslinker ACF7 plays a key role in tight junction stabilization and wound healing in intestinal epithelium.
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Affiliation(s)
- Yanlei Ma
- Department of GI surgery, Shanghai Tenth People's Hospital Affiliated with Tongji University, 301 Yanchang Road, Shanghai 200072, China.,The University of Chicago, Ben May Department for Cancer Research, Chicago, Illinois 60637, USA.,State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, Guanxi Normal University, Guilin 541004, China
| | - Jiping Yue
- The University of Chicago, Ben May Department for Cancer Research, Chicago, Illinois 60637, USA
| | - Yao Zhang
- Department of Colorectal Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Chenzhang Shi
- Department of GI surgery, Shanghai Tenth People's Hospital Affiliated with Tongji University, 301 Yanchang Road, Shanghai 200072, China
| | - Matt Odenwald
- Pritzker School of Medicine, University of Chicago, Chicago, Illinois 60637, USA
| | - Wenguang G Liang
- The University of Chicago, Ben May Department for Cancer Research, Chicago, Illinois 60637, USA
| | - Qing Wei
- Department of Pathology, Shanghai Tenth People's Hospital Affiliated with Tongji University, 301 Yanchang Road, Shanghai 200072, China
| | - Ajay Goel
- Center for Gastrointestinal Research, Center for Epigenetics, Cancer Prevention and Cancer Genomics, Baylor Scott &White Research Institute and Charles A. Sammons Cancer Center, Texas, USA
| | - Xuewen Gou
- The University of Chicago, Ben May Department for Cancer Research, Chicago, Illinois 60637, USA
| | - Jamie Zhang
- The University of Chicago, Ben May Department for Cancer Research, Chicago, Illinois 60637, USA
| | - Shao-Yu Chen
- Department of Pharmacology and Toxicology, University of Louisville Health Science Center, Louisville, Kentucky 40292, USA
| | - Wei-Jen Tang
- The University of Chicago, Ben May Department for Cancer Research, Chicago, Illinois 60637, USA
| | - Jerrold R Turner
- Departments of Pathology and Medicine (GI), Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Feng Yang
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, Guanxi Normal University, Guilin 541004, China
| | - Hong Liang
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, Guanxi Normal University, Guilin 541004, China
| | - Huanlong Qin
- Department of GI surgery, Shanghai Tenth People's Hospital Affiliated with Tongji University, 301 Yanchang Road, Shanghai 200072, China
| | - Xiaoyang Wu
- The University of Chicago, Ben May Department for Cancer Research, Chicago, Illinois 60637, USA
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Shao YX, Lei Z, Wolf PG, Gao Y, Guo YM, Zhang BK. Zinc Supplementation, via GPR39, Upregulates PKCζ to Protect Intestinal Barrier Integrity in Caco-2 Cells Challenged bySalmonella entericaSerovar Typhimurium. J Nutr 2017; 147:1282-1289. [DOI: 10.3945/jn.116.243238] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 11/23/2016] [Accepted: 04/13/2017] [Indexed: 12/26/2022] Open
Affiliation(s)
- Yu-Xin Shao
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhao Lei
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Patricia G Wolf
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL
| | - Yan Gao
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yu-Ming Guo
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Bing-Kun Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
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246
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Kim MH, Kim H. The Roles of Glutamine in the Intestine and Its Implication in Intestinal Diseases. Int J Mol Sci 2017; 18:ijms18051051. [PMID: 28498331 PMCID: PMC5454963 DOI: 10.3390/ijms18051051] [Citation(s) in RCA: 180] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 05/09/2017] [Accepted: 05/10/2017] [Indexed: 12/16/2022] Open
Abstract
Glutamine, the most abundant free amino acid in the human body, is a major substrate utilized by intestinal cells. The roles of glutamine in intestinal physiology and management of multiple intestinal diseases have been reported. In gut physiology, glutamine promotes enterocyte proliferation, regulates tight junction proteins, suppresses pro-inflammatory signaling pathways, and protects cells against apoptosis and cellular stresses during normal and pathologic conditions. As glutamine stores are depleted during severe metabolic stress including trauma, sepsis, and inflammatory bowel diseases, glutamine supplementation has been examined in patients to improve their clinical outcomes. In this review, we discuss the physiological roles of glutamine for intestinal health and its underlying mechanisms. In addition, we discuss the current evidence for the efficacy of glutamine supplementation in intestinal diseases.
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Affiliation(s)
- Min-Hyun Kim
- Food Science and Human Nutrition Department, Center for Nutritional Sciences, College of Agricultural and Life Sciences, University of Florida, Gainesville, FL 32611, USA.
| | - Hyeyoung Kim
- Department of Food and Nutrition, Brain Korea 21 PLUS Project, College of Human Ecology, Yonsei University, Seoul 03722, Korea.
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247
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Molina-Jijón E, Rodríguez-Muñoz R, González-Ramírez R, Namorado-Tónix C, Pedraza-Chaverri J, Reyes JL. Aldosterone signaling regulates the over-expression of claudin-4 and -8 at the distal nephron from type 1 diabetic rats. PLoS One 2017; 12:e0177362. [PMID: 28493961 PMCID: PMC5426686 DOI: 10.1371/journal.pone.0177362] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 04/17/2017] [Indexed: 12/19/2022] Open
Abstract
Hyperglycemia in diabetes alters tight junction (TJ) proteins in the kidney. We evaluated the participation of aldosterone (ALD), and the effect of spironolactone (SPL), a mineralocorticoid receptor antagonist, on the expressions of claudin-2, -4, -5 and -8, and occludin in glomeruli, proximal and distal tubules isolated from diabetic rats. Type 1 diabetes was induced in female Wistar rats by a single tail vein injection of streptozotocin (STZ), and SPL was administrated daily by gavage, from days 3–21. Twenty-one days after STZ injection the rats were sacrificed. In diabetic rats, the serum ALD levels were increased, and SPL-treatment did not have effect on these levels or in hyperglycemia, however, proteinuria decreased in SPL-treated diabetic rats. Glomerular damage, evaluated by nephrin and Wilm’s tumor 1 (WT1) protein expressions, and proximal tubular damage, evaluated by kidney injury molecule 1 (Kim-1) and heat shock protein 72 kDa (Hsp72) expressions, were ameliorated by SPL. Also, SPL prevented decrement in claudin-5 in glomeruli, and claudin-2 and occludin in proximal tubules by decreasing oxidative stress, evaluated by superoxide anion (O2●―) production, and oxidative stress markers. In distal tubules, SPL ameliorated increase in mRNA, protein expression, and phosphorylation in threonine residues of claudin-4 and -8, through a serum and glucocorticoid-induced kinase 1 (SGK1), and with-no-lysine kinase 4 (WNK4) signaling pathway. In conclusion, this is the first study that demonstrates that ALD modulates the expression of renal TJ proteins in diabetes, and that the blockade of its actions with SPL, may be a promising therapeutic strategy to prevent alterations of TJ proteins in diabetic nephropathy.
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MESH Headings
- Aldosterone/metabolism
- Animals
- Claudin-4/metabolism
- Claudins/metabolism
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/complications
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Type 1/blood
- Diabetes Mellitus, Type 1/complications
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/pathology
- Female
- Hyperglycemia/blood
- Hyperglycemia/drug therapy
- Hyperglycemia/prevention & control
- Immediate-Early Proteins/metabolism
- Kidney Glomerulus/drug effects
- Kidney Glomerulus/pathology
- Kidney Tubules/drug effects
- Kidney Tubules/pathology
- Models, Biological
- Natriuresis/drug effects
- Nephrons/metabolism
- Oxidative Stress/drug effects
- Phosphorylation/drug effects
- Potassium/blood
- Protein Serine-Threonine Kinases/metabolism
- Proteinuria/blood
- Proteinuria/complications
- Proteinuria/drug therapy
- Proteinuria/prevention & control
- Rats, Wistar
- Signal Transduction/drug effects
- Spironolactone/pharmacology
- Spironolactone/therapeutic use
- Tight Junctions/drug effects
- Tight Junctions/metabolism
- Weight Loss/drug effects
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Affiliation(s)
- Eduardo Molina-Jijón
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV-IPN), Mexico City, México
- Departamento de Biociencias e Ingeniería, Centro Interdisciplinario de Investigaciones y Estudios sobre el Medio Ambiente y Desarrollo del Instituto Politécnico Nacional (CIIEMAD-IPN), Mexico City, México
| | - Rafael Rodríguez-Muñoz
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV-IPN), Mexico City, México
| | - Ricardo González-Ramírez
- Department of Molecular Biology and Histocompatibility, Dr. Manuel Gea González, General Hospital, Mexico City, México
| | - Carmen Namorado-Tónix
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV-IPN), Mexico City, México
| | - José Pedraza-Chaverri
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City, México
| | - Jose L. Reyes
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV-IPN), Mexico City, México
- * E-mail:
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248
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Garcia-Hernandez V, Quiros M, Nusrat A. Intestinal epithelial claudins: expression and regulation in homeostasis and inflammation. Ann N Y Acad Sci 2017; 1397:66-79. [PMID: 28493289 DOI: 10.1111/nyas.13360] [Citation(s) in RCA: 268] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 03/17/2017] [Accepted: 03/23/2017] [Indexed: 12/31/2022]
Abstract
The intestinal epithelium forms a highly dynamic and selective barrier that controls absorption of fluid and solutes while restricting pathogen access to underlying tissues. Barrier properties are achieved by intercellular junctions that include an apical tight junction (TJ) and subjacent adherens junctions and desmosomes. The TJ tetraspan claudin proteins form pores between epithelial cells to control paracellular fluid and ion movement. In addition to regulation of barrier function, claudin family members control epithelial homeostasis and are expressed in a spatiotemporal manner in the intestinal crypt-luminal axis. This delicate balance of physiologic differential claudin protein expression is altered during mucosal inflammation. Inflammatory mediators influence transcriptional regulation, as well as endocytic trafficking, targeting, and retention of claudins in the TJ. Increased expression of intestinal epithelial claudin-1, -2, and -18 with downregulation of claudin-3, -4, -5, -7, -8, and -12 has been observed in intestinal inflammatory disorders. Such changes in claudin proteins modify the epithelial barrier function in addition to influencing epithelial and mucosal homeostasis. An improved understanding of the regulatory mechanisms that control epithelial claudin proteins will provide strategies to strengthen the epithelial barrier function and restore mucosal homeostasis in inflammatory disorders.
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Affiliation(s)
| | - Miguel Quiros
- Department of Pathology, University of Michigan, Ann Arbor, Michigan
| | - Asma Nusrat
- Department of Pathology, University of Michigan, Ann Arbor, Michigan
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249
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Li Y, Xu B, Xu M, Chen D, Xiong Y, Lian M, Sun Y, Tang Z, Wang L, Jiang C, Lin Y. 6-Gingerol protects intestinal barrier from ischemia/reperfusion-induced damage via inhibition of p38 MAPK to NF-κB signalling. Pharmacol Res 2017; 119:137-148. [PMID: 28167239 DOI: 10.1016/j.phrs.2017.01.026] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 01/25/2017] [Indexed: 01/08/2023]
Abstract
Intestinal ischemia reperfusion (I/R) injury caused by severe trauma, intestinal obstruction, and operation is one of the tough challenges in clinic. 6-Gingerol (6G), a main active ingredient of ginger, is found to have anti-microbial, anti-inflammatory, anti-oxidative, and anti-cancer activities. The present study was designed to characterize the potential protective effects of 6G on rat intestinal I/R injury and reveal the correlated mechanisms. Rat intestinal I/R model was established with clamping the superior mesenteric artery (SMA) and 6G was intragastrically administered for three consecutive days before I/R injury. Caco-2 and IEC-6 cells were incubated under hypoxia/reoxygenation (H/R) conditions to simulate I/R injury in vitro. The results showed that 6G significantly alleviated intestinal injury in I/R injured rats by reducing the generation of oxidative stress and inhibiting p38 MAPK signaling pathway. 6G significantly reduced MDA level and increased the levels of SOD, GSH, and GSH-Px in I/R injured intestinal tissues. 6G significantly decreased the production of proinflammatory cytokines including TNF-α, IL-1β, and IL-6, and inhibited the expression of inflammatory mediators iNOS/NO in I/R injured intestinal tissues. The impaired intestinal barrier function was restored by using 6G in I/R injured rats and in both Caco-2 and IEC-6 cells characterized by inhibiting p38 MAPK phosphorylation, nuclear translocation of NF-κB, and expression of myosin light chain kinase (MLCK) protein. 6G also reduced the generation of reactive oxygen species (ROS) in both Caco-2 and IEC-6 cells. In vitro transfection of p38 MAPK siRNA mitigated the impact of 6G on NF-κB and MLCK expression, and the results further corroborated the protective effects of 6G on intestinal I/R injury by repressing p38 MAPK signaling. In conclusion, the present study suggests that 6G exerts protective effects against I/R-induced intestinal mucosa injury by inhibiting the formation of ROS and p38 MAPK activation, providing novel insights into the mechanisms of this therapeutic candidate for the treatment of intestinal injury.
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Affiliation(s)
- Yanli Li
- Department of Pharmacology, Dalian Medical University, Dalian 116044, China
| | - Bin Xu
- Department of Pharmacology, Dalian Medical University, Dalian 116044, China
| | - Ming Xu
- Department of Pharmacology, Dalian Medical University, Dalian 116044, China
| | - Dapeng Chen
- Laboratory Animal Center, Dalian Medical University, Dalian 116044, China
| | - Yongjian Xiong
- Central Laboratory, The First Affiliated Hospital, Dalian Medical University, Dalian 116044, China
| | - Mengqiao Lian
- Department of Pharmacology, Dalian Medical University, Dalian 116044, China
| | - Yuchao Sun
- Department of Pharmacology, Dalian Medical University, Dalian 116044, China
| | - Zeyao Tang
- Department of Pharmacology, Dalian Medical University, Dalian 116044, China
| | - Li Wang
- Department of Pharmacology, Dalian Medical University, Dalian 116044, China
| | - Chunling Jiang
- Department of Physiology, Dalian Medical University, Dalian 116044, China
| | - Yuan Lin
- Department of Pharmacology, Dalian Medical University, Dalian 116044, China.
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250
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Size-selective opening of the blood-brain barrier by targeting endothelial sphingosine 1-phosphate receptor 1. Proc Natl Acad Sci U S A 2017; 114:4531-4536. [PMID: 28396408 DOI: 10.1073/pnas.1618659114] [Citation(s) in RCA: 149] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The vasculature of the central nervous system (CNS) forms a selective barrier termed the blood-brain barrier (BBB). Disruption of the BBB may contribute to various CNS diseases. Conversely, the intact BBB restricts efficient penetration of CNS-targeted drugs. Here, we report the BBB-regulatory role of endothelial sphingosine 1-phosphate (S1P) receptor-1, a G protein-coupled receptor known to promote the barrier function in peripheral vessels. Endothelial-specific S1pr1 knockout mice (S1pr1iECKO ) showed BBB breach for small-molecular-mass fluorescence tracers (<3 kDa), but not larger tracers (>10 kDa). Chronic BBB leakiness was associated with cognitive impairment, as assessed by the novel object recognition test, but not signs of brain inflammation. Brain microvessels of S1pr1iECKO mice showed altered subcellular distribution of tight junctional proteins. Pharmacological inhibition of S1P1 function led to transient BBB breach. These data suggest that brain endothelial S1P1 maintain the BBB by regulating the proper localization of tight junction proteins and raise the possibility that endothelial S1P1 inhibition may be a strategy for transient BBB opening and delivery of small molecules into the CNS.
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