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Barbati C, Bromuro C, Vendetti S, Torosantucci A, Cauda R, Cassone A, Palma C. The Glycan Ectodomain of SARS-CoV-2 Spike Protein Modulates Cytokine Production and Expression of CD206 Mannose Receptor in PBMC Cultures of Pre-COVID-19 Healthy Subjects. Viruses 2024; 16:497. [PMID: 38675840 PMCID: PMC11054381 DOI: 10.3390/v16040497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 03/12/2024] [Accepted: 03/22/2024] [Indexed: 04/28/2024] Open
Abstract
The ability of recombinant, SARS-CoV-2 Spike (S) protein to modulate the production of two COVID-19 relevant, pro-inflammatory cytokines (IL-6 and IFN-γ) in PBMC cultures of healthy, pre-COVID-19 subjects was investigated. We observed that cytokine production was largely and diversely modulated by the S protein depending on antigen or mitogen stimulation, as well as on the protein source, insect (S-in) or human (S-hu) cells. While both proteins co-stimulated cytokine production by polyclonally CD3-activated T cells, PBMC activation by the mitogenic lectin Concanavalin A (Con A) was up-modulated by S-hu protein and down-modulated by S-in protein. These modulatory effects were likely mediated by the S glycans, as demonstrated by direct Con A-S binding experiments and use of yeast mannan as Con A binder. While being ineffective in modulating memory antigenic T cell responses, the S proteins and mannan were able to induce IL-6 production in unstimulated PBMC cultures and upregulate the expression of the mannose receptor (CD206), a marker of anti-inflammatory M2 macrophage. Our data point to a relevant role of N-glycans, particularly N-mannosidic chains, decorating the S protein in the immunomodulatory effects here reported. These novel biological activities of the S glycan ectodomain may add to the comprehension of COVID-19 pathology and immunity to SARS-CoV-2.
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Affiliation(s)
- Cristiana Barbati
- Department of Infectious Diseases, Istituto Superiore di Sanità, Viale Regina Elena, 299, 00161 Rome, Italy; (C.B.); (C.B.); (S.V.); (A.T.)
| | - Carla Bromuro
- Department of Infectious Diseases, Istituto Superiore di Sanità, Viale Regina Elena, 299, 00161 Rome, Italy; (C.B.); (C.B.); (S.V.); (A.T.)
| | - Silvia Vendetti
- Department of Infectious Diseases, Istituto Superiore di Sanità, Viale Regina Elena, 299, 00161 Rome, Italy; (C.B.); (C.B.); (S.V.); (A.T.)
| | - Antonella Torosantucci
- Department of Infectious Diseases, Istituto Superiore di Sanità, Viale Regina Elena, 299, 00161 Rome, Italy; (C.B.); (C.B.); (S.V.); (A.T.)
| | - Roberto Cauda
- Dipartimento Salute e Bioetica, Sezione Malattie Infettive, Policlinico Universitario A. Gemelli IRCCS, Largo Agostino Gemelli, 8, 00136 Rome, Italy;
| | - Antonio Cassone
- Polo d’Innovazione della Genomica, Genetica e Biologia, Strada del Petriccio e Belriguardo 35, 53100 Siena, Italy
| | - Carla Palma
- Department of Infectious Diseases, Istituto Superiore di Sanità, Viale Regina Elena, 299, 00161 Rome, Italy; (C.B.); (C.B.); (S.V.); (A.T.)
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2
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Huldani H, Rashid AI, Turaev KN, Opulencia MJC, Abdelbasset WK, Bokov DO, Mustafa YF, Al-Gazally ME, Hammid AT, Kadhim MM, Ahmadi SH. Concanavalin A as a promising lectin-based anti-cancer agent: the molecular mechanisms and therapeutic potential. Cell Commun Signal 2022; 20:167. [PMID: 36289525 PMCID: PMC9597983 DOI: 10.1186/s12964-022-00972-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 09/17/2022] [Indexed: 11/29/2022] Open
Abstract
Concanavalin A (ConA), the most studied plant lectin, has been known as a potent anti-neoplastic agent for a long time. Since initial reports on its capacity to kill cancer cells, much attention has been devoted to unveiling the lectin's exact molecular mechanism. It has been revealed that ConA can bind to several receptors on cancerous and normal cells and modulate the related signaling cascades. The most studied host receptor for ConA is MT1-MMP, responsible for most of the lectin's modulations, ranging from activating immune cells to killing tumor cells. In this study, in addition to studying the effect of ConA on signaling and immune cell function, we will focus on the most up-to-date advancements that unraveled the molecular mechanisms by which ConA can induce autophagy and apoptosis in various cancer cell types, where it has been found that P73 and JAK/STAT3 are the leading players. Moreover, we further discuss the main signaling molecules causing liver injury as the most significant side effect of the lectin injection. Altogether, these findings may shed light on the complex signaling pathways controlling the diverse responses created via ConA treatment, thereby modulating these complex networks to create more potent lectin-based cancer therapy. Video Abstract
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Affiliation(s)
- Huldani Huldani
- grid.443126.60000 0001 2193 0299Department of Physiology, Faculty of Medicine, Lambung Mangkurat University, Banjarmasin, South Kalimantan Indonesia
| | - Ahmed Ibraheem Rashid
- grid.427646.50000 0004 0417 7786Department of Pharmacology, Collage of Medicine, University of Babylon, Hilla, Iraq
| | - Khikmatulla Negmatovich Turaev
- grid.444694.f0000 0004 0403 0119Department of Clinical Pharmacology, Samarkand State Medical Institute, Samarkand, Uzbekistan ,grid.513581.b0000 0004 6356 9173Department of Scientific Affairs, Tashkent State Dental Institute, Makhtumkuli Street 103, Tashkent, Uzbekistan 100047
| | | | - Walid Kamal Abdelbasset
- grid.449553.a0000 0004 0441 5588Department of Health and Rehabilitation Sciences, College of Applied Medical Sciences, Prince Sattam Bin Abdulaziz University, Al Kharj, Saudi Arabia ,grid.7776.10000 0004 0639 9286Department of Physical Therapy, Kasr Al-Aini Hospital, Cairo University, Giza, Egypt
| | - Dmitry Olegovich Bokov
- grid.448878.f0000 0001 2288 8774Institute of Pharmacy, Sechenov First Moscow State Medical University, 8 Trubetskaya St., Bldg. 2, Moscow, 119991 Russian Federation ,grid.466474.3Laboratory of Food Chemistry, Federal Research Center of Nutrition, Biotechnology and Food Safety, 2/14 Ustyinsky Pr, Moscow, 109240 Russian Federation
| | - Yasser Fakri Mustafa
- grid.411848.00000 0000 8794 8152Department of Pharmaceutical Chemistry, College of Pharmacy, University of Mosul, Mosul-41001, Iraq
| | | | - Ali Thaeer Hammid
- grid.513683.a0000 0004 8495 7394Computer Engineering Techniques Department, Faculty of Information Technology, Imam Ja’afar Al-Sadiq University, Baghdad, Iraq
| | - Mustafa M. Kadhim
- Department of Dentistry, Kut University College, Kut, Wasit 52001 Iraq ,grid.444971.b0000 0004 6023 831XCollege of Technical Engineering, The Islamic University, Najaf, Iraq ,Department of Pharmacy, Osol Aldeen University College, Baghdad, Iraq
| | - Seyed Hossein Ahmadi
- grid.411705.60000 0001 0166 0922Research Center for Cell and Molecular Sciences, School of Medicine, Tehran University of Medical Sciences, PO Box 1417613151, Tehran, Iran
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3
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Yang J, Hu F, Guo C, Liang Y, Song H, Cheng K. Discovery of isoliquiritigenin analogues that reverse acute hepatitis by inhibiting macrophage polarization. Bioorg Chem 2021; 114:105043. [PMID: 34120019 DOI: 10.1016/j.bioorg.2021.105043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/10/2021] [Accepted: 05/28/2021] [Indexed: 11/26/2022]
Abstract
Screening a natural product library of 850 compounds yield isoliquiritigenin as an effective anti-inflammatory agent by inhibiting the production of pro-inflammatory NO induced by Pam3CSK4, while its activity accompanied by toxicity. Further studies obtained the optimized isoliquiritigenin derivative SMU-B14, which can inhibit Pam3CSK4 triggered toll-like receptor 2 (TLR2) signaling with low toxicity and high potency. Preliminary mechanism studies indicated that SMU-B14 worked through TLR2/MyD88, phosphorylation of IKKα/β, leading to the reduce degradation of NF-κB related IKBα and p65 complex, then inhibited the production of inflammatory cytokines, such as TNF-α, IL-6, IL-1β both in human and murine cell lines. Subsequent polarization experiments showed SMU-B14 significant reversed the polarization of M1 phenotype primary macrophage activated by Pam3CSK4in vitro, and reduced the infiltration of neutrophil and polarization of M1-type macrophage, decreased serum alanine transaminase (ALT), as a result protected liver from being injured in vivo. In summary, we obtained an optimized lead compound SMU-B14 and found it functionally blocked TLR2/MyD88/NF-κB signaling pathway to down-regulate the production of inflammatory cytokines resulted significant liver protection property.
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Affiliation(s)
- Junjie Yang
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Fanjie Hu
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Chengjun Guo
- School of Applied Mathematics, Guangdong University of Technology, 510006, China
| | - Yuqing Liang
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Haiying Song
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Kui Cheng
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China.
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Jia R, Li Y, Cao L, Du J, Zheng T, Qian H, Gu Z, Jeney G, Xu P, Yin G. Antioxidative, anti-inflammatory and hepatoprotective effects of resveratrol on oxidative stress-induced liver damage in tilapia (Oreochromis niloticus). Comp Biochem Physiol C Toxicol Pharmacol 2019; 215:56-66. [PMID: 30336289 DOI: 10.1016/j.cbpc.2018.10.002] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 10/09/2018] [Indexed: 12/31/2022]
Abstract
Resveratrol, a dietary polyphenol, has been shown to exert antioxidation, hepatoprotection, anti-inflammation and immunostimulation. However, the effects and underlying mechanism of resveratrol on liver injury in fish are still unclear. In the present study, we investigated the potential protective effects and mechanism of resveratrol on oxidative stress-induced liver damage in tilapia. Fish were fed diet containing four doses of resveratrol (0, 0.1, 0.3, and 0.6 g/kg diet) for 60 days, and then given an intraperitoneal injection of H2O2 or saline. The results showed that administration of resveratrol significantly ameliorated H2O2-induced liver injury. In serum and liver, resveratrol treatment suppressed the oxidative stress, as evidenced by the decline of lipid peroxidation level and increase of antioxidant activity. Resveratrol also activated erythroid 2-related factor 2 (Nrf2) signaling pathway and enhanced the heme oxygenase 1 (HO-1), NAD(P) H:quinone oxidoreductase 1 (NQO-1), glutathione S-transferase (GST) mRNA levels. Meanwhile, resveratrol treatment repressed TLR2-Myd88-NF-κB signaling pathway to decrease the inflammatory response in H2O2-induced liver injury as evidenced by the lower interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α) and IL-8 mRNA levels and higher IL-10 mRNA level. Moreover, resveratrol treatment attenuated immunotoxicity in liver of H2O2-treated fish, accompanied by upregulation of hepcidin (HEP), complement 3 (C3) and lysozyme (LZM) mRNA levels. Overall results suggested that the protection of resveratrol on H2O2-induced liver injury, inflammation and immunotoxicity was due to its antioxidant property and its ability to modulate the Nrf2 and TLR2-Myd88-NF-κB signaling pathways.
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Affiliation(s)
- Rui Jia
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China; Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; International Joint Research Laboratory for Fish Immunopharmacology, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China.
| | - Yao Li
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Liping Cao
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; International Joint Research Laboratory for Fish Immunopharmacology, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
| | - Jinliang Du
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; International Joint Research Laboratory for Fish Immunopharmacology, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
| | - Tao Zheng
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Hao Qian
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Zhengyan Gu
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Galina Jeney
- International Joint Research Laboratory for Fish Immunopharmacology, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; National Agricultural Research Center, Research Institute for Fisheries and Aquaculture, Anna Light 8, Szarvas 5440, Hungary
| | - Pao Xu
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China; Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; International Joint Research Laboratory for Fish Immunopharmacology, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
| | - Guojun Yin
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China; Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; International Joint Research Laboratory for Fish Immunopharmacology, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China.
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5
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3, 5, 3'-Triiodothyroacetic acid (TRIAC) is an anti-inflammatory drug that targets toll-like receptor 2. Arch Pharm Res 2018; 41:995-1008. [PMID: 30099678 DOI: 10.1007/s12272-018-1057-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 07/20/2018] [Indexed: 12/18/2022]
Abstract
Drug repositioning is a strategy that explores new pharmaceutical applications of previously launched or failed drugs, and is advantageous since it saves capital and time. In this study, we examined the inhibition of TLR2 signaling by drug candidates. HEK-Blue™-hTLR2 cells were pretreated with drugs and stimulated using the TLR2 ligand, Pam3CSK4. Among the drugs that inhibited TLR2 signaling, we selected TRIAC, which is yet to be patented. Pretreatment with TRIAC decreased the TLR2 level and the phosphorylation of Akt and MAPKs in HEK-Blue™-hTLR2 cells. Since TLR2 is overexpressed in patients with acute hepatitis, we confirmed that TRIAC alleviates necrosis in a mouse model of Con A-induced acute hepatitis. The serum AST and ALT levels are indicators of liver damage, and are increased in Con A-induced hepatitis. Additionally, TLR2 and inflammatory cytokine levels are increased following administration of Con A and lead to liver damage. TRIAC decreased the serum levels of AST and ALT, and reduced liver tissue necrosis in mice with Con A-induced acute fulminant liver damage, by reducing the levels of inflammatory cytokines. In conclusion, TRIAC alleviates inflammation in mouse models of Con A-induced hepatitis by inhibiting the phosphorylation of Akt and MAPKs, the sub-mechanisms underlying TLR2 signaling.
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6
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Wang L, Zhang W, Ge CH, Yin RH, Xiao Y, Zhan YQ, Yu M, Li CY, Ge ZQ, Yang XM. Toll-like receptor 5 signaling restrains T-cell/natural killer T-cell activation and protects against concanavalin A-induced hepatic injury. Hepatology 2017; 65:2059-2073. [PMID: 28273362 DOI: 10.1002/hep.29140] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 02/27/2017] [Indexed: 01/06/2023]
Abstract
UNLABELLED Toll-like receptor-5 (TLR5) signaling regulates the immune privileged status of the liver and is involved in hepatic immune disorders. However, the role of TLR5 has not yet been investigated in experimental models of concanavalin A (Con A)-mediated liver injury. Here, we show that TLR5 is highly up-regulated in the hepatic mononuclear cells of mice during Con A-induced hepatitis. Increased mortality and liver histopathology of TLR5-deficient mice correlated with excessive production of proinflammatory cytokines, suggesting that TLR5 knockout mice were more susceptible to Con A-induced hepatitis. We also report that administration of CBLB502, an exogenous TLR5 agonist, substantially alleviated Con A-mediated hepatitis in wild-type mice as shown by increased survival rates, reduced aminotransferase and proinflammatory cytokine production, impaired lymphocyte infiltration, and ameliorated hepatocyte necrosis and/or apoptosis. Mechanistic studies revealed that CBLB502 acts as a negative regulator in limiting T-cell/natural killer T-cell activity and cytokine production in the Con A-hepatitis model. Bone marrow transplantation experiments showed that TLR5 in bone marrow-derived cells contributed to the hepatoprotective efficacy of CBLB502 against Con A-induced liver injury. Moreover, interleukin-6 elevation induced by CBLB502 is an important protective factor against Con A-induced liver injury. In addition, we demonstrate that CBLB502 suppresses α-galactosylceramide-induced natural killer T cell-dependent inflammatory liver injury. CONCLUSION The TLR5 signaling pathway plays an important role in T cell-mediated hepatic injury and may be exploited for therapeutic treatment of inflammatory liver diseases. (Hepatology 2017;65:2059-2073).
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Affiliation(s)
- Lei Wang
- Department of Pharmaceutical Engineering, Tianjin University, Tianjin, China.,Beijing Institute of Radiation Medicine, Beijing, China
| | - Wen Zhang
- Department of Pharmaceutical Engineering, Tianjin University, Tianjin, China.,Beijing Institute of Radiation Medicine, Beijing, China
| | - Chang-Hui Ge
- Beijing Institute of Radiation Medicine, Beijing, China.,State Key Laboratory of Proteomics, Beijing, China
| | - Rong-Hua Yin
- Beijing Institute of Radiation Medicine, Beijing, China.,State Key Laboratory of Proteomics, Beijing, China
| | - Yang Xiao
- Beijing Institute of Radiation Medicine, Beijing, China.,State Key Laboratory of Proteomics, Beijing, China
| | - Yi-Qun Zhan
- Beijing Institute of Radiation Medicine, Beijing, China.,State Key Laboratory of Proteomics, Beijing, China
| | - Miao Yu
- Beijing Institute of Radiation Medicine, Beijing, China.,State Key Laboratory of Proteomics, Beijing, China
| | - Chang-Yan Li
- Beijing Institute of Radiation Medicine, Beijing, China.,State Key Laboratory of Proteomics, Beijing, China
| | - Zhi-Qiang Ge
- Department of Pharmaceutical Engineering, Tianjin University, Tianjin, China
| | - Xiao-Ming Yang
- Department of Pharmaceutical Engineering, Tianjin University, Tianjin, China.,Beijing Institute of Radiation Medicine, Beijing, China.,State Key Laboratory of Proteomics, Beijing, China
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7
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Bleau C, Burnette M, Filliol A, Piquet-Pellorce C, Samson M, Lamontagne L. Toll-like receptor-2 exacerbates murine acute viral hepatitis. Immunology 2016; 149:204-24. [PMID: 27273587 PMCID: PMC5011685 DOI: 10.1111/imm.12627] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 05/31/2016] [Accepted: 06/05/2016] [Indexed: 12/23/2022] Open
Abstract
Viral replication in the liver is generally detected by cellular endosomal Toll‐like receptors (TLRs) and cytosolic helicase sensors that trigger antiviral inflammatory responses. Recent evidence suggests that surface TLR2 may also contribute to viral detection through recognition of viral coat proteins but its role in the outcome of acute viral infection remains elusive. In this study, we examined in vivo the role of TLR2 in acute infections induced by the highly hepatotrophic mouse hepatitis virus (MHV) type 3 and weakly hepatotrophic MHV‐A59 serotype. To address this, C57BL/6 (wild‐type; WT) and TLR2 knockout (KO) groups of mice were intraperitoneally infected with MHV3 or MHV‐A59. MHV3 infection provoked a fulminant hepatitis in WT mice, characterized by early mortality and high alanine and aspartate transaminase levels, histopathological lesions and viral replication whereas infection of TLR2 KO mice was markedly less severe. MHV‐A59 provoked a comparable mild and subclinical hepatitis in WT and TLR2 KO mice. MHV3‐induced fulminant hepatitis in WT mice correlated with higher hepatic expression of interferon‐β, interleukin‐6, tumour necrosis factor‐α, CXCL1, CCL2, CXCL10 and alarmin (interleukin‐33) than in MHV‐A59‐infected WT mice and in MHV3‐infected TLR2 KO mice. Intrahepatic recruited neutrophils, natural killer cells, natural killer T cells or macrophages rapidly decreased in MHV3‐infected WT mice whereas they were sustained in MHV‐A59‐infected WT mice and MHV3‐infected TLR2 KO. MHV3 in vitro infection of macrophagic cells induced rapid and higher viral replication and/or interleukin‐6 induction in comparison to MHV‐A59, and depended on viral activation of TLR2 and p38 mitogen‐activated protein kinase. Taken together, these results support a new aggravating inflammatory role for TLR2 in MHV3‐induced acute fulminant hepatitis.
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Affiliation(s)
- Christian Bleau
- Department of Biological Sciences, Université du Québec à Montréal, Montreal, Canada
| | - Mélanie Burnette
- Department of Biological Sciences, Université du Québec à Montréal, Montreal, Canada
| | - Aveline Filliol
- U.1085 Inserm, IRSET, Institute of Research in Environmental and Occupational Health, Université de Rennes 1, Rennes, France
| | - Claire Piquet-Pellorce
- U.1085 Inserm, IRSET, Institute of Research in Environmental and Occupational Health, Université de Rennes 1, Rennes, France
| | - Michel Samson
- U.1085 Inserm, IRSET, Institute of Research in Environmental and Occupational Health, Université de Rennes 1, Rennes, France
| | - Lucie Lamontagne
- Department of Biological Sciences, Université du Québec à Montréal, Montreal, Canada
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8
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Nanni SB, Pratt J, Beauchemin D, Haidara K, Annabi B. Impact of Concanavalin-A-Mediated Cytoskeleton Disruption on Low-Density Lipoprotein Receptor-Related Protein-1 Internalization and Cell Surface Expression in Glioblastomas. BIOMARKERS IN CANCER 2016; 8:77-87. [PMID: 27226736 PMCID: PMC4874747 DOI: 10.4137/bic.s38894] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 04/17/2016] [Accepted: 04/26/2016] [Indexed: 01/13/2023]
Abstract
The low-density lipoprotein receptor-related protein 1 (LRP-1) is a multiligand endocytic receptor, which plays a pivotal role in controlling cytoskeleton dynamics during cancer cell migration. Its rapid endocytosis further allows efficient clearance of extracellular ligands. Concanavalin-A (ConA) is a lectin used to trigger in vitro physiological cellular processes, including cytokines secretion, nitric oxide production, and T-lymphocytes activation. Given that ConA exerts part of its effects through cytoskeleton remodeling, we questioned whether it affected LRP-1 expression, intracellular trafficking, and cell surface function in grade IV U87 glioblastoma cells. Using flow cytometry and confocal microscopy, we found that loss of the cell surface 600-kDa mature form of LRP-1 occurs upon ConA treatment. Consequently, internalization of the physiological α2-macroglobulin and the synthetic angiopep-2 ligands of LRP-1 was also decreased. Silencing of known mediators of ConA, such as the membrane type-1 matrix metalloproteinase, and the Toll-like receptors (TLR)-2 and TLR-6 was unable to rescue ConA-mediated LRP-1 expression decrease, implying that the loss of LRP-1 was independent of cell surface relayed signaling. The ConA-mediated reduction in LRP-1 expression was emulated by the actin cytoskeleton-disrupting agent cytochalasin-D, but not by the microtubule inhibitor nocodazole, and required both lysosomal- and ubiquitin-proteasome system-mediated degradation. Our study implies that actin cytoskeleton integrity is required for proper LRP-1 cell surface functions and that impaired trafficking leads to specialized compartmentation and degradation. Our data also strengthen the biomarker role of cell surface LRP-1 functions in the vectorized transport of therapeutic angiopep bioconjugates into brain cancer cells.
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Affiliation(s)
- Samuel Burke Nanni
- Laboratoire d'Oncologie Moléculaire, Centre de recherche BIOMED, Département de Chimie, Université du Québec à Montréal, QC, Canada
| | - Jonathan Pratt
- Laboratoire d'Oncologie Moléculaire, Centre de recherche BIOMED, Département de Chimie, Université du Québec à Montréal, QC, Canada
| | - David Beauchemin
- Laboratoire d'Oncologie Moléculaire, Centre de recherche BIOMED, Département de Chimie, Université du Québec à Montréal, QC, Canada
| | - Khadidja Haidara
- Laboratoire d'Oncologie Moléculaire, Centre de recherche BIOMED, Département de Chimie, Université du Québec à Montréal, QC, Canada
| | - Borhane Annabi
- Laboratoire d'Oncologie Moléculaire, Centre de recherche BIOMED, Département de Chimie, Université du Québec à Montréal, QC, Canada
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9
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Ji YR, Kim HJ, Bae KB, Lee S, Kim MO, Ryoo ZY. Hepatic serum amyloid A1 aggravates T cell-mediated hepatitis by inducing chemokines via Toll-like receptor 2 in mice. J Biol Chem 2015; 290:12804-11. [PMID: 25847238 DOI: 10.1074/jbc.m114.635763] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Indexed: 01/22/2023] Open
Abstract
Serum amyloid A is a proinflammatory molecule that induces leukocyte infiltration and promotes neutrophil adhesion to endothelial cells under inflammatory conditions. The aim of this study was to examine whether Saa1 aggravates T cell-mediated hepatitis by inducing chemokines in a liver-specific, Saa1-overexpressing, transgenic (TG) mouse model. We generated TG mice in which Saa1 was overexpressed specifically in liver tissue. The chemokines monocyte chemotactic protein 1 (MCP1), MIP1α, MIP1β, interferon γ-induced protein 10 (IP-10), and eotaxin were induced in Saa1 TG mice. After concanavalin A treatment, Saa1 expression was higher in Saa1 TG mice than in WT mice. More severe liver injury, increased hepatocyte apoptosis, and higher levels of hepatic enzymes were observed in Saa1 TG mice than in WT mice. Liver infiltration of CD4(+) T cells and macrophages increased after inducing hepatitis. Activation of T cells was higher in Saa1 TG mice than in WT mice, and the populations of Th17 cells and regulatory T cells were altered by overexpressing Saa1 in TG mice. Secretion of various cytokines, such as interferon γ, tumor necrosis factor α, and interleukin 6, increased in Saa1 TG mice. Injecting a Toll-like receptor 2 (TLR2) antagonist in vivo inhibited chemokine expression and IκBα phosphorylation and showed that the induction of chemokines by Saa1 was dependent on TLR2. Hepatic Saa1 accelerated T cell-mediated hepatitis by inducing chemokine production and activating T cells by TLR2. Therefore, Saa1 might be a novel inflammatory factor that acts as a chemokine modulator in hepatitis.
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Affiliation(s)
- Young Rae Ji
- From the School of Life Science, KNU Creative BioResearch Group (BK21 Plus Project), Kyungpook National University, Buk-gu, Daegu 702-701, Korea and
| | - Hei Jung Kim
- From the School of Life Science, KNU Creative BioResearch Group (BK21 Plus Project), Kyungpook National University, Buk-gu, Daegu 702-701, Korea and
| | - Ki Beom Bae
- From the School of Life Science, KNU Creative BioResearch Group (BK21 Plus Project), Kyungpook National University, Buk-gu, Daegu 702-701, Korea and
| | - Sanggyu Lee
- From the School of Life Science, KNU Creative BioResearch Group (BK21 Plus Project), Kyungpook National University, Buk-gu, Daegu 702-701, Korea and
| | - Myoung Ok Kim
- the Department of Animal Science, Kyungpook National University, Sangju 742-711, Korea
| | - Zae Young Ryoo
- From the School of Life Science, KNU Creative BioResearch Group (BK21 Plus Project), Kyungpook National University, Buk-gu, Daegu 702-701, Korea and
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