1
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cRGD enables rapid phagocytosis of liposomal vancomycin for intracellular bacterial clearance. J Control Release 2022; 344:202-213. [DOI: 10.1016/j.jconrel.2022.02.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/18/2022] [Accepted: 02/23/2022] [Indexed: 12/24/2022]
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2
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Yang H, Ye X, Zhang X, Li X, Fu Q, Tang Z. Intracellular osteopontin negatively regulates toll-like receptor 4-mediated inflammatory response via regulating GSK3β and 4EBP1 phosphorylation. Cytokine 2018; 108:89-95. [PMID: 29587154 DOI: 10.1016/j.cyto.2018.03.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 02/12/2018] [Accepted: 03/12/2018] [Indexed: 12/14/2022]
Abstract
Toll-like receptors (TLRs) play an important role in host defense against invading pathogens. By initiating a signal transduction cascade, TLRs lead to the release of pro-inflammatory cytokines. However, the inappropriate activation of TLR signaling could result in inflammatory disorders or autoimmune diseases. Osteopontin (OPN) has been reported to be an inflammatory cytokine participating in cell-mediated immunity. However, the role of OPN in TLR-mediated immune responses is poorly understood. In the present study, OPN-deficient (OPN-/-) macrophages exhibited significantly higher levels of pro-inflammatory cytokines after stimulation with lipopolysaccharide (LPS). Our study also demonstrated that the intracellular OPN (iOPN) isoform acted as a negative regulator to inhibit LPS-induced inflammatory responses. Compared to WT macrophages, OPN-/- macrophages had lower Akt phosphorylation levels and higher GSK3β phosphorylation levels, which were downregulated by p-Akt. Moreover, as a down-stream target of Akt, 4EBP1 was hypo-phosphorylated in OPN-/- macrophages compared to 4EBP1 in WT macrophages. These findings reveal that iOPN can regulate GSK3β and 4EBP1 phosphorylation to inhibit TLR4-mediated inflammatory responses.
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Affiliation(s)
- Haiou Yang
- Department of Laboratory Medicine, The International Peace Maternity & Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, PR China
| | - Xingchen Ye
- Department of Laboratory Medicine, Huzhou Central Hospital, Huzhou, Zhejiang 303000, PR China
| | - Xiaoqing Zhang
- Department of Laboratory Medicine, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, PR China
| | - Xiaoliang Li
- Department of Laboratory Medicine, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, PR China
| | - Qihua Fu
- Department of Laboratory Medicine, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, PR China.
| | - Zhenhua Tang
- Department of Laboratory Medicine, The International Peace Maternity & Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, PR China.
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3
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Kim JH, Lee J, Bae SJ, Kim Y, Park BJ, Choi JW, Kwon J, Cha GH, Yoo HJ, Jo EK, Bae YS, Lee YH, Yuk JM. NADPH oxidase 4 is required for the generation of macrophage migration inhibitory factor and host defense against Toxoplasma gondii infection. Sci Rep 2017; 7:6361. [PMID: 28743960 PMCID: PMC5526938 DOI: 10.1038/s41598-017-06610-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 06/14/2017] [Indexed: 12/31/2022] Open
Abstract
Nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (Nox) are an important family of catalytic enzymes that generate reactive oxygen species (ROS), which mediate the regulation of diverse cellular functions. Although phagocyte Nox2/gp91phox is closely associated with the activation of host innate immune responses, the roles of Nox family protein during Toxoplasma gondii (T. gondii) infection have not been fully investigated. Here, we found that T. gondii-mediated ROS production was required for the upregulation of macrophage migration inhibitory factor (MIF) mRNA and protein levels via activation of mitogen-activated protein kinase and nuclear factor-κB signaling in macrophages. Interestingly, MIF knockdown led to a significant increase in the survival of intracellular T. gondii in bone marrow-derived macrophages (BMDMs). Moreover, Nox4 deficiency, but not Nox2/gp91phox and the cytosolic subunit p47phox, resulted in enhanced survival of the intracellular T. gondii RH strain and impaired expression of T. gondii-mediated MIF in BMDMs. Additionally, Nox4-deficient mice showed increased susceptibility to virulent RH strain infection and increased cyst burden in brain tissues and low levels of MIF expression following infection with the avirulent ME49 strain. Collectively, our findings indicate that Nox4-mediated ROS generation plays a central role in MIF production and resistance to T. gondii infection.
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Affiliation(s)
- Ji Hye Kim
- Department of Infection Biology, College of Medicine, Chungnam National University, Daejeon, South Korea.,Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Jina Lee
- Department of Infection Biology, College of Medicine, Chungnam National University, Daejeon, South Korea.,Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Su-Jin Bae
- Department of Infection Biology, College of Medicine, Chungnam National University, Daejeon, South Korea.,Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Yeeun Kim
- Department of Infection Biology, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Byung-Joon Park
- Department of Infection Biology, College of Medicine, Chungnam National University, Daejeon, South Korea.,Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Jae-Won Choi
- Department of Infection Biology, College of Medicine, Chungnam National University, Daejeon, South Korea.,Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Jaeyul Kwon
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, South Korea.,Department of Medical Education, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Guang-Ho Cha
- Department of Infection Biology, College of Medicine, Chungnam National University, Daejeon, South Korea.,Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Heon Jong Yoo
- Department of Obstetrics and Gynecology, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Eun-Kyeong Jo
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, South Korea.,Department of Microbiology, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Yun Soo Bae
- Department of Life Science, Ewha Womans University, Seoul, South Korea
| | - Young-Ha Lee
- Department of Infection Biology, College of Medicine, Chungnam National University, Daejeon, South Korea. .,Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, South Korea.
| | - Jae-Min Yuk
- Department of Infection Biology, College of Medicine, Chungnam National University, Daejeon, South Korea. .,Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, South Korea.
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4
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Comparative analysis of gene expression profiles of OPN signalling pathway in four kinds of liver diseases. J Genet 2016; 95:741-50. [DOI: 10.1007/s12041-016-0673-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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5
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Wang G, Li X, Chen S, Zhao W, Yang J, Chang C, Xu C. Expression profiles uncover the correlation of OPN signaling pathways with rat liver regeneration at cellular level. Cell Biol Int 2015; 39:1329-40. [DOI: 10.1002/cbin.10523] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 07/16/2015] [Accepted: 08/07/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Gaiping Wang
- College of Life Science; Henan Normal University; Xinxiang Henan China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation; Henan Normal University; Xinxiang China
| | - Xiaofang Li
- College of Life Science; Henan Normal University; Xinxiang Henan China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation; Henan Normal University; Xinxiang China
| | - Shasha Chen
- College of Life Science; Henan Normal University; Xinxiang Henan China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation; Henan Normal University; Xinxiang China
| | - Weiming Zhao
- College of Life Science; Henan Normal University; Xinxiang Henan China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation; Henan Normal University; Xinxiang China
| | - Jing Yang
- College of Life Science; Henan Normal University; Xinxiang Henan China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation; Henan Normal University; Xinxiang China
| | - Cuifang Chang
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation; Henan Normal University; Xinxiang China
| | - Cunshuan Xu
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation; Henan Normal University; Xinxiang China
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Wang H, Chen X, Su Y, Paueksakon P, Hu W, Zhang MZ, Harris RC, Blackwell TS, Zent R, Pozzi A. p47(phox) contributes to albuminuria and kidney fibrosis in mice. Kidney Int 2015; 87:948-62. [PMID: 25565313 PMCID: PMC4425591 DOI: 10.1038/ki.2014.386] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 09/03/2014] [Accepted: 10/01/2014] [Indexed: 12/19/2022]
Abstract
Reactive oxygen species (ROS) have an important pathogenic role in the development of many diseases, including kidney disease. Major ROS generators in the glomerulus of the kidney are the p47(phox)-containing NAPDH oxidases NOX1 and NOX2. The cytosolic p47(phox) subunit is a key regulator of the assembly and function of NOX1 and NOX2 and its expression and phosphorylation are upregulated in the course of renal injury, and have been shown to exacerbate diabetic nephropathy. However, its role in nondiabetic-mediated glomerular injury is unclear. To address this, we subjected p47(phox)-null mice to either adriamycin-mediated or partial renal ablation-mediated glomerular injury. Deletion of p47(phox) protected the mice from albuminuria and glomerulosclerosis in both injury models. Integrin α1-null mice develop more severe glomerulosclerosis compared with wild-type mice in response to glomerular injury mainly due to increased production of ROS. Interestingly, the protective effects of p47(phox) knockout were more profound in p47(phox)/integrin α1 double knockout mice. In vitro analysis of primary mesangial cells showed that deletion of p47(phox) led to reduced basal levels of superoxide and collagen IV production. Thus, p47(phox)-dependent NADPH oxidases are a major glomerular source of ROS, contribute to kidney injury, and are potential targets for antioxidant therapy in fibrotic disease.
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Affiliation(s)
- Hongtao Wang
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA
| | - Xiwu Chen
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA
| | - Yan Su
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA
| | - Paisit Paueksakon
- Department of Pathology, Immunology, and Microbiology, Vanderbilt University, Nashville, Tennessee, USA
| | - Wen Hu
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA
| | - Ming-Zhi Zhang
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA
| | - Raymond C Harris
- 1] Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA [2] Department of Medicine, Veterans Affairs Hospitals, Nashville, Tennessee, USA
| | - Timothy S Blackwell
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA
| | - Roy Zent
- 1] Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA [2] Department of Medicine, Veterans Affairs Hospitals, Nashville, Tennessee, USA
| | - Ambra Pozzi
- 1] Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA [2] Department of Medicine, Veterans Affairs Hospitals, Nashville, Tennessee, USA
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Fan X, He C, Jing W, Zhou X, Chen R, Cao L, Zhu M, Jia R, Wang H, Guo Y, Zhao J. Intracellular Osteopontin inhibits toll-like receptor signaling and impedes liver carcinogenesis. Cancer Res 2014; 75:86-97. [PMID: 25398438 DOI: 10.1158/0008-5472.can-14-0615] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Osteopontin (OPN) has been implicated widely in tumor growth and metastasis, but the range of its contributions is not yet fully understood. In this study, we show that genetic ablation of Opn in mice sensitizes them to diethylnitrosamine (DEN)-induced hepatocarcinogenesis. Opn-deficient mice (Opn(-/-) mice) exhibited enhanced production of proinflammatory cytokines and compensatory proliferation. Administering OPN antibody or recombinant OPN protein to wild-type or Opn(-/-) mice-derived macrophages, respectively, had little effect on cytokine production. In contrast, overexpression of intracellular OPN (iOPN) in Opn-deficient macrophages strongly suppressed production of proinflammatory cytokines. In addition, we found that iOPN was able to interact with the pivotal Toll-like receptor (TLR) signaling protein MyD88 in macrophages after stimulation with cellular debris, thereby disrupting TLR signaling in macrophages. Our results indicated that iOPN was capable of functioning as an endogenous negative regulator of TLR-mediated immune responses, acting to ameliorate production of proinflammatory cytokines and curtail DEN-induced hepatocarcinogenesis. Together, our results expand the important role of OPN in inflammation-associated cancers and deepen its relevance for novel treatment strategies in liver cancer.
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Affiliation(s)
- Xiaoyu Fan
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, China. School of Pharmacy, Liaocheng University, Liaocheng, Shandong, China
| | - Chunyan He
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, China
| | - Wei Jing
- Changhai Hospital, The Second Military Medical University, Shanghai, China
| | - Xuyu Zhou
- Changhai Hospital, The Second Military Medical University, Shanghai, China
| | - Rui Chen
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, China. School of Pharmacy, Liaocheng University, Liaocheng, Shandong, China
| | - Lei Cao
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, China
| | - Minhui Zhu
- Changhai Hospital, The Second Military Medical University, Shanghai, China
| | - Rongjie Jia
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, China. School of Pharmacy, Liaocheng University, Liaocheng, Shandong, China
| | - Hao Wang
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, China. School of Pharmacy, Liaocheng University, Liaocheng, Shandong, China
| | - Yajun Guo
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, China. School of Pharmacy, Liaocheng University, Liaocheng, Shandong, China. PLA General Hospital Cancer Center, PLA Postgraduate School of Medicine, Beijing, China.
| | - Jian Zhao
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, China. School of Pharmacy, Liaocheng University, Liaocheng, Shandong, China. PLA General Hospital Cancer Center, PLA Postgraduate School of Medicine, Beijing, China.
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Abstract
AIM Osteopontin (OPN), a multifunctional protein, has been reported to be protoxicant in acetaminophen hepatotoxicity. In this study, the mechanisms underlying the detrimental role of OPN in acetaminophen toxicity were explored. METHODS Male C57BL/6 (wild-type, WT) and OPN(-/-) mice were administered with acetaminophen (500 mg/kg, ip). After the treatment, serum transaminase (ALT), as well as OPN expression, histology changes, oxidative stress and inflammation response in liver tissue were studied. Freshly isolated hepatocytes of WT and OPN(-/-) mice were prepared. RESULTS Acetaminophen administration significantly increased OPN protein level in livers of WT mice. OPN expression was mainly localized in hepatic macrophages 6 h after the administration. In OPN(-/-) mice, acetaminophen-induced serum ALT release was reduced, but the centrilobular hepatic necrosis was increased. In OPN(-/-) mice, the expression of CYP2E1 and CYP1A2 in livers was significantly increased; GSH depletion and lipid peroxidation in livers were enhanced. On the other hand, OPN(-/-) mice exhibited less macrophage and neutrophil infiltration and reduced expression of proinflammatory cytokines TNF-α and IL-1α in livers. An anti-OPN neutralizing antibody significantly reduced acetaminophen-induced serum ALT level and inflammatory infiltration in livers of WT mice. CONCLUSION OPN plays a dual role in acetaminophen toxicity: OPN in hepatocytes inhibits acetaminophen metabolism, while OPN in macrophages enhances acetaminophen toxicity via recruitment of inflammatory cells and production of proinflammatory cytokines.
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