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Wang J, Zhao H, Lv K, Zhao W, Zhang N, Yang F, Wen X, Jiang X, Tian J, Liu X, Ho CT, Li S. Pterostilbene Ameliorates DSS-Induced Intestinal Epithelial Barrier Loss in Mice via Suppression of the NF-κB-Mediated MLCK-MLC Signaling Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:3871-3878. [PMID: 33759516 DOI: 10.1021/acs.jafc.1c00274] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The integrity of the intestinal barrier is critical for homeostasis. In this study, we investigated the protective effect of pterostilbene (PTE) on the intestinal epithelium barrier. In vitro results of transepithelial electrical resistance (TEER) in Caco-2 cells indicated that PTE counteracted tumor necrosis factor α (TNFα)-induced barrier damage. In vivo PTE pretreatment markedly ameliorated intestinal barrier dysfunction induced by dextran sulfate sodium (DSS). Notably, intestinal epithelial tight junction (TJ) molecules were restored by PTE in mice exposed to DSS. The mechanism study revealed that PTE prevented myosin light-chain kinase (MLCK) from driving phosphorylation of MLC (p-MLC), which is crucial for maintaining intestinal TJ stability. Furthermore, PTE blunted translocation of NF-κB subunit p65 into the nucleus to downregulate MLCK expression and then to safeguard TJs and barrier integrity. These findings suggest that PTE protected the intestinal epithelial barrier through the NF-κB- MLCK/p-MLC signal pathway.
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Affiliation(s)
- Juan Wang
- Tianjin Key Laboratory of Food and Biotechnology, School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Hui Zhao
- Tianjin Key Laboratory of Food and Biotechnology, School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Ke Lv
- Tianjin Key Laboratory of Food and Biotechnology, School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
- Hubei Key Laboratory of EFGIR, Huanggang Normal University, Huanggang, Hubei 438000, China
| | - Wei Zhao
- Tianjin Key Laboratory of Food and Biotechnology, School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Ning Zhang
- Tianjin Key Laboratory of Food and Biotechnology, School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Fan Yang
- Tianjin Key Laboratory of Food and Biotechnology, School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Xiang Wen
- Tianjin Key Laboratory of Food and Biotechnology, School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Xiaohua Jiang
- Department of Histololgy and Embrylolgy, School of Basic Medicine, North China University of Science and Technology, 21 Bohai Road, Caofeidian Xincheng, Tangshan, Hebei 063210, China
| | - Jingrui Tian
- Department of Histololgy and Embrylolgy, School of Basic Medicine, North China University of Science and Technology, 21 Bohai Road, Caofeidian Xincheng, Tangshan, Hebei 063210, China
| | - Xinjuan Liu
- Department of Gastroenterology, Beijing Chaoyang Hospital, Capital Medical University, Chaoyang District, Beijing100024, China
| | - Chi-Tang Ho
- Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901, United States
| | - Shiming Li
- Hubei Key Laboratory of EFGIR, Huanggang Normal University, Huanggang, Hubei 438000, China
- Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901, United States
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Jie Y, Peng W, Li YY. Identification of novel candidate biomarkers for pancreatic adenocarcinoma based on TCGA cohort. Aging (Albany NY) 2021; 13:5698-5717. [PMID: 33591944 PMCID: PMC7950294 DOI: 10.18632/aging.202494] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 12/18/2020] [Indexed: 12/15/2022]
Abstract
Pancreatic adenocarcinoma (PAAD) is the most serious solid tumor type throughout the world. The present study aimed to identify novel biomarkers and potential efficacious small drugs in PAAD using integrated bioinformatics analyses. A total of 4777 differentially expressed genes (DEGs) were filtered, 2536 upregulated DEGs and 2241 downregulated DEGs. Weighted gene co-expression network analysis was then used and identified 12 modules, of which, blue module with the most significant enrichment result was selected. KEGG and GO enrichment analyses showed that all DEGs of blue module were enriched in EMT and PI3K/Akt pathway. Three hub genes (ITGB1, ITGB5, and OSMR) were determined as key genes with higher expression levels, significant prognostic value and excellent diagnostic efficiency for PAAD. Additionally, some small molecule drugs that possess the potential to treat PAAD were screened out, including thapsigargin (TG). Functional in vitro experiments revealed that TG repressed cell viability via inactivating the PI3K/Akt pathway in PAAD cells. Totally, our findings identified three key genes implicated in PAAD and screened out several potential small drugs to treat PAAD.
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Affiliation(s)
- Yang Jie
- Department of Pharmacy, Shandong Provincial Hospital, Jinan 250022, Shandong, P.R. China
| | - Wang Peng
- Department of Pharmacy, The First Affiliated Hospital of Shandong First Medical University, Jinan 250014, Shandong, P.R. China
| | - Yuan-Yuan Li
- Department of Pharmacy, The First Affiliated Hospital of Shandong First Medical University, Jinan 250014, Shandong, P.R. China
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Xu H, Zhang L, Kang H, Liu J, Zhang J, Zhao J, Liu S. Metabolomics Identifies Biomarker Signatures to Differentiate Pancreatic Cancer from Type 2 Diabetes Mellitus in Early Diagnosis. Int J Endocrinol 2021; 2021:9990768. [PMID: 34868309 PMCID: PMC8639267 DOI: 10.1155/2021/9990768] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 10/07/2021] [Accepted: 11/02/2021] [Indexed: 12/26/2022] Open
Abstract
METHODS Plasma metabolic profiles in 26 PC patients, 27 DM patients, and 23 healthy volunteers were examined using an ultraperformance liquid chromatography coupled with tandem mass spectrometry platform. Differential metabolite ions were then identified using the principal component analysis (PCA) model and the orthogonal partial least-squares discrimination analysis (OPLS-DA) model. The diagnosis performance of metabolite biomarkers was validated by logistic regression models. RESULTS We established a PCA model (R2X = 23.5%, Q2 = 8.21%) and an OPLS-DA model (R2X = 70.0%, R2Y = 84.9%, Q2 = 69.7%). LysoPC (16 : 0), catelaidic acid, cerebronic acid, nonadecanetriol, and asparaginyl-histidine were found to identify PC, with a sensitivity of 89% and a specificity of 91%. Besides, lysoPC (16 : 0), lysoPC (16 : 1), lysoPC (22 : 6), and lysoPC (20 : 3) were found to differentiate PC from DM, with higher accuracy (68% versus 55%) and higher AUC values (72% versus 63%) than those of CA19-9. The diagnostic performance of metabolite biomarkers was finally validated by logistic regression models. CONCLUSION We succeeded in screening differential metabolite ions among PC and DM patients and healthy individuals, thus providing a preliminary basis for screening the biomarkers for the early diagnosis of PC.
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Affiliation(s)
- Hongmin Xu
- Department of Clinical Laboratory, The Third Central Hospital of Tianjin, Tianjin Institute of Hepatobiliary Disease, Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Artificial Cell Engineering Technology Research Center, No. 83, Jintang Road, Hedong District, Tianjin 300170, China
| | - Lei Zhang
- Department of Clinical Laboratory, The Third Central Hospital of Tianjin, Tianjin Institute of Hepatobiliary Disease, Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Artificial Cell Engineering Technology Research Center, No. 83, Jintang Road, Hedong District, Tianjin 300170, China
| | - Hua Kang
- Department of Clinical Laboratory, The Third Central Hospital of Tianjin, Tianjin Institute of Hepatobiliary Disease, Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Artificial Cell Engineering Technology Research Center, No. 83, Jintang Road, Hedong District, Tianjin 300170, China
| | - Jie Liu
- Department of Clinical Laboratory, The Third Central Hospital of Tianjin, Tianjin Institute of Hepatobiliary Disease, Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Artificial Cell Engineering Technology Research Center, No. 83, Jintang Road, Hedong District, Tianjin 300170, China
| | - Jiandong Zhang
- Department of Clinical Laboratory, The Third Central Hospital of Tianjin, Tianjin Institute of Hepatobiliary Disease, Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Artificial Cell Engineering Technology Research Center, No. 83, Jintang Road, Hedong District, Tianjin 300170, China
| | - Jie Zhao
- Department of Clinical Laboratory, The Third Central Hospital of Tianjin, Tianjin Institute of Hepatobiliary Disease, Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Artificial Cell Engineering Technology Research Center, No. 83, Jintang Road, Hedong District, Tianjin 300170, China
| | - Shuye Liu
- Department of Clinical Laboratory, The Third Central Hospital of Tianjin, Tianjin Institute of Hepatobiliary Disease, Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Artificial Cell Engineering Technology Research Center, No. 83, Jintang Road, Hedong District, Tianjin 300170, China
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Han J, Li JH, Bai G, Shen GS, Chen J, Liu JN, Wang S, Liu XJ. Acanthopanax senticosus polysaccharides-induced intestinal tight junction injury alleviation via inhibition of NF-κB/MLCK pathway in a mouse endotoxemia model. World J Gastroenterol 2017; 23:2175-2184. [PMID: 28405145 PMCID: PMC5374129 DOI: 10.3748/wjg.v23.i12.2175] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 01/18/2017] [Accepted: 02/17/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To examine the effects of Acanthopanax senticosus polysaccharides (ASPS) on intestinal tight junction (TJ) disruption and nuclear factor-kappa B (NF-κB)/myosin light chain kinase (MLCK) activation in endotoxemia.
METHODS BALB/C mice (6-8-weeks-old) received continuous intragastric gavage of ASPS for 7 d before injection of lipopolysaccharide (LPS), or received ASPS once after LPS injection. Blood and intestinal mucosal samples were collected 6 h after LPS challenge. Clinical symptoms, histological injury, intestinal permeability, TJ ultrastructure, and TJ protein expression were determined.
RESULTS Compared with mice in the LPS group, pretreatment with ASPS improved clinical and histological scores by 390.9% (P < 0.05) and 57.89% (P < 0.05), respectively, and gut permeability change in endotoxemic mice was shown by a 61.93% reduction in reduced leakage of fluorescein isothiocyanate-dextran 6 h after LPS injection (P < 0.05). ASPS pretreatment also prevented LPS-induced TJ ultrastructure breakdown supported by increased electron dense materials between adjoining cells, sustained redistribution and expression of occludin (0.597 ± 0.027 vs 0.103 ± 0.009, P < 0.05) and zonula occludens-1 (0.507 ± 0.032 vs 0.125 ± 0.019, P < 0.05), and suppressed activation of the NF-κB/MLCK pathway indicated by reduced expression of NF-κB, phospho-inhibitor kappa B-alpha, MLCK and phospho-myosin light-chain-2 by 16.06% (P < 0.05), 54.31% (P < 0.05), 66.10% (P < 0.05) and 64.82% (P < 0.05), respectively.
CONCLUSION ASPS pretreatment may be associated with inhibition of the NF-κB/MLCK pathway and concomitant amelioration of LPS-induced TJ dysfunction of intestinal epithelium in endotoxemia.
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Li X, Zhou X, Li Y, Li J, Privratsky B, Ye Y, Wu E, Gao H, Huang C, Wu M. Lyn regulates inflammatory responses in Klebsiella pneumoniae infection via the p38/NF-κB pathway. Eur J Immunol 2014; 44:763-73. [PMID: 24338528 PMCID: PMC4103995 DOI: 10.1002/eji.201343972] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 10/07/2013] [Accepted: 11/11/2013] [Indexed: 02/05/2023]
Abstract
Klebsiella pneumoniae (Kp) is one of the most common pathogens in nosocomial infections and is becoming increasingly multidrug resistant. However, the underlying molecular pathogenesis of this bacterium remains elusive, limiting the therapeutic options. Understanding the mechanism of its pathogenesis may facilitate the development of anti-bacterial therapeutics. Here, we show that Lyn, a pleiotropic Src tyrosine kinase, is involved in host defense against Kp by regulating phagocytosis process and simultaneously downregulating inflammatory responses. Using acute infection mouse models, we observed that lyn(-/-) mice were more susceptible to Kp with increased mortality and severe lung injury compared with WT mice. Kp infected-lyn(-/-) mice exhibited elevated inflammatory cytokines (IL-6 and TNF-α), and increased superoxide in the lung and other organs. In addition, the phosphorylation of p38 and NF-κB p65 subunit increased markedly in response to Kp infection in lyn(-/-) mice. We also demonstrated that the translocation of p65 from cytoplasm to nuclei increased in cultured murine lung epithelial cells by Lyn siRNA knockdown. Furthermore, lipid rafts clustered with activated Lyn and accumulated in the site of Kp invasion. Taken together, these findings revealed that Lyn may participate in host defense against Kp infection through the negative modulation of inflammatory cytokines.
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Affiliation(s)
- Xuefeng Li
- The State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
- Department of Biochemistry and Molecular Biology, University of North Dakota, Grand Forks, North Dakota 58203-9037, USA
| | - Xikun Zhou
- The State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
- Department of Biochemistry and Molecular Biology, University of North Dakota, Grand Forks, North Dakota 58203-9037, USA
| | - Yi Li
- The State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
- Department of Biochemistry and Molecular Biology, University of North Dakota, Grand Forks, North Dakota 58203-9037, USA
| | - Jiaxin Li
- Department of Biochemistry and Molecular Biology, University of North Dakota, Grand Forks, North Dakota 58203-9037, USA
| | - Breanna Privratsky
- Department of Biochemistry and Molecular Biology, University of North Dakota, Grand Forks, North Dakota 58203-9037, USA
| | - Yan Ye
- Department of Biochemistry and Molecular Biology, University of North Dakota, Grand Forks, North Dakota 58203-9037, USA
| | - Erxi Wu
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, ND, USA
| | - Hongwei Gao
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative & Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Canhua Huang
- The State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Min Wu
- Department of Biochemistry and Molecular Biology, University of North Dakota, Grand Forks, North Dakota 58203-9037, USA
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Lysophosphatidic acid stimulates activation of focal adhesion kinase and paxillin and promotes cell motility, via LPA1-3, in human pancreatic cancer. Dig Dis Sci 2013; 58:3524-33. [PMID: 24061591 DOI: 10.1007/s10620-013-2878-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 09/04/2013] [Indexed: 01/04/2023]
Abstract
BACKGROUND Pancreatic cancer is highly metastatic and with poor prognosis. In previous studies, lysophosphatidic acid (LPA) was shown to be a critical component of ascites which promoted the invasion and metastasis of pancreatic cancer. Two focal adhesion proteins, focal adhesion kinase (FAK) and paxillin, were crucially involved in cell migration, cytoskeleton reorganization, and the dynamics of focal adhesion. OBJECTIVES This study examined the involvement of LPA1-3 in LPA-induced activation of FAK and paxillin, and in cell motility, in pancreatic cancer PANC-1 cells. METHODS Reverse transcriptase polymerase chain reaction analysis was used to examine mRNA expression of LPA receptors in PANC-1. Cellular protein expression of FAK and paxillin was analyzed by western blotting. The subcellular location of FAK and paxillin was visualized by immunofluorescence. Cell migration was measured by use of a transwell migration chamber. RESULTS Three LPA receptors (LPA1, LPA2, and LPA3) were significantly expressed in PANC-1 cells. Treatment with LPA induced both time and dose-dependent tyrosine phosphorylation of FAK and paxillin. LPA also affected translocation of FAK and paxillin from cytoplasm to focal adhesions at the cell periphery and enhanced cell motility of PANC-1. Pretreatment with 3-(4-(4-((1-(2-chlorophenyl)ethoxy)carbonyl amino)-3-methyl-5-isoxazolyl)benzylsulfanyl)propanoic acid (Ki16425), an antagonist of LPA1 and LPA3, before LPA attenuated the LPA-induced tyrosine phosphorylation and redistribution of FAK and paxillin and abrogated LPA-induced cellular migration activity. CONCLUSIONS These results suggest LPA induces activation of FAK and paxillin via LPA1-3, which may contribute to the increased cell motility in human pancreatic cancer PANC-1 cells. Thus, an understanding of the regulation by LPA of cell motility in pancreatic cancer could identify novel targets for therapy.
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Kadekar S, Silins I, Korhonen A, Dreij K, Al-Anati L, Högberg J, Stenius U. Exocrine pancreatic carcinogenesis and autotaxin expression. PLoS One 2012; 7:e43209. [PMID: 22952646 PMCID: PMC3430650 DOI: 10.1371/journal.pone.0043209] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Accepted: 07/18/2012] [Indexed: 12/12/2022] Open
Abstract
Exocrine pancreatic cancer is an aggressive disease with an exceptionally high mortality rate. Genetic analysis suggests a causative role for environmental factors, but consistent epidemiological support is scarce and no biomarkers for monitoring the effects of chemical pancreatic carcinogens are available. With the objective to identify common traits for chemicals inducing pancreatic tumors we studied the National Toxicology Program (NTP) bioassay database. We found that male rats were affected more often than female rats and identified eight chemicals that induced exocrine pancreatic tumors in males only. For a hypothesis generating process we used a text mining tool to analyse published literature for suggested mode of actions (MOA). The resulting MOA analysis suggested inflammatory responses as common feature. In cell studies we found that all the chemicals increased protein levels of the inflammatory protein autotaxin (ATX) in Panc-1, MIA PaCa-2 or Capan-2 cells. Induction of MMP-9 and increased invasive migration were also frequent effects, consistent with ATX activation. Testosterone has previously been implicated in pancreatic carcinogenesis and we found that it increased ATX levels. Our data show that ATX is a target for chemicals inducing pancreatic tumors in rats. Several lines of evidence implicate ATX and its product lysophosphatidic acid in human pancreatic cancer. Mechanisms of action may include stimulated invasive growth and metastasis. ATX may interact with hormones or onco- or suppressor-genes often deregulated in exocrine pancreatic cancer. Our data suggest that ATX is a target for chemicals promoting pancreatic tumor development.
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Affiliation(s)
- Sandeep Kadekar
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Ilona Silins
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
- * E-mail:
| | - Anna Korhonen
- Computer Laboratory, University of Cambridge, Cambridge, United Kingdom
| | - Kristian Dreij
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Lauy Al-Anati
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Johan Högberg
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Ulla Stenius
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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LV G, Li P, Wang W, Wang S, Chen J, Gong Y. Lysophosphatidic acid (LPA) and endothelial differentiation gene (Edg) receptors in human pancreatic cancer. J Surg Oncol 2011; 104:685-91. [DOI: 10.1002/jso.22016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Accepted: 06/09/2011] [Indexed: 11/06/2022]
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Yuan K, Huang C, Fox J, Gaid M, Weaver A, Li G, Singh BB, Gao H, Wu M. Elevated inflammatory response in caveolin-1-deficient mice with Pseudomonas aeruginosa infection is mediated by STAT3 protein and nuclear factor kappaB (NF-kappaB). J Biol Chem 2011; 286:21814-25. [PMID: 21515682 DOI: 10.1074/jbc.m111.237628] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Caveolin-1 (Cav-1), an important composition protein within the flask-shaped membrane invaginations termed caveolae, may play a role in host defense against infections. However, the phenotype in Pseudomonas aeruginosa-infected cav1 knock-out (KO) mice is still unresolved, and the mechanism involved is almost entirely unknown. Using a respiratory infection model, we confirmed a crucial role played by Cav-1 in host defense against this pathogen because Cav-1 KO mice showed increased mortality, severe lung injury, and systemic dissemination as compared with wild-type (WT) littermates. In addition, cav1 KO mice exhibited elevated inflammatory cytokines (IL-6, TNF-α, and IL-12a), decreased phagocytic ability of macrophages, and increased superoxide release in the lung, liver, and kidney. We further studied relevant cellular signaling processes and found that STAT3 and NF-κB are markedly activated. Our data revealed that the Cav-1/STAT3/NF-κB axis is responsible for a dysregulated cytokine response, which contributes to increased mortality and disease progression. Moreover, down-regulating Cav-1 in cell culture with a dominant negative strategy demonstrated that STAT3 activation was essential for the translocation of NF-κB into the nucleus, confirming the observations from cav1 KO mice. Collectively, our studies indicate that Cav-1 is critical for inflammatory responses regulating the STAT3/NF-κB pathway and thereby impacting P. aeruginosa infection.
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Affiliation(s)
- Kefei Yuan
- State Key Laboratory for Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
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Zhong YY, Huang JA. Recent advances in understanding the role of lysophosphatidic acid in the pathogenesis of gastrointestinal tumors. Shijie Huaren Xiaohua Zazhi 2010; 18:276-279. [DOI: 10.11569/wcjd.v18.i3.276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Lysophosphatidic acid is an important intercellular lipid mediator that acts through G-protein coupled receptors to mediate the development and progression of a variety of tumors. In this article, we will summarize the structure and physiological function of lysophosphatidic acid and review its role in the pathogenesis of colon cancer, gastric cancer, liver cancer and other gastrointestinal tumors.
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George J, Headen KV, Ogunleye AO, Perry GA, Wilwerding TM, Parrish LC, McVaney TP, Mattson JS, Cerutis DR. Lysophosphatidic Acid signals through specific lysophosphatidic Acid receptor subtypes to control key regenerative responses of human gingival and periodontal ligament fibroblasts. J Periodontol 2009; 80:1338-47. [PMID: 19656035 PMCID: PMC11037860 DOI: 10.1902/jop.2009.080624] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND We showed that the pluripotent platelet growth factor and mediator lysophosphatidic acid (LPA) controls key regenerative responses of human gingival fibroblasts (GFs) and periodontal ligament fibroblasts (PDLFs) and positively modulates their responses to platelet-derived growth factor (PDGF). This study determined which LPA receptor (LPAR) subtype(s) LPA signals through to stimulate mitogenic extracellular signal-regulated kinase (ERK) 1/2 signaling and chemotaxis and to elicit intracellular Ca(2+) increases in GFs and PDLFs because many healing responses are calcium-dependent. METHODS Activation of mitogen-activated protein kinase was determined using Western blotting with an antibody to phosphorylated ERK1/2. Migration responses were measured using a microchemotaxis chamber. GF and PDLF intracellular Ca(2+) mobilization responses to multiple LPA species and LPAR subtype-specific agonists were measured by using a cell-permeable fluorescent Ca(2+) indicator dye. RESULTS LPA stimulated ERK1/2 phosphorylation via LPA(1)(-3). For GFs, LPA(1) preferentially elicited chemotaxis, and LPA(1-3) for PDLFs, as confirmed using subtype-specific agonists. Elevation of intracellular calcium seems to be mediated through LPA(1) and LPA(3), with little, if any, contribution from LPA(2). CONCLUSIONS To the best of our knowledge, this study provides the first evidence that LPA signals through specific LPAR subtypes to stimulate human oral fibroblast regenerative responses. These data, in conjunction with our previous findings showing that LPA modulates GF and PDLF responses to PDGF, suggest that LPA is a factor of emerging importance to oral wound healing.
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Affiliation(s)
- JoJu George
- Department of Pharmacology, Creighton University School of Medicine, Omaha, NE
| | - Karmel V. Headen
- Department of Oral Biology, Creighton University School of Dentistry, Omaha, NE
| | | | - Greg A. Perry
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine
| | | | | | | | - John S. Mattson
- Department of Periodontics, Creighton University School of Dentistry
| | - D. Roselyn Cerutis
- Department of Oral Biology, Creighton University School of Dentistry, Omaha, NE
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