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Tahoun A, Jensen K, Corripio-Miyar Y, McAteer S, Smith DGE, McNeilly TN, Gally DL, Glass EJ. Host species adaptation of TLR5 signalling and flagellin recognition. Sci Rep 2017; 7:17677. [PMID: 29247203 PMCID: PMC5732158 DOI: 10.1038/s41598-017-17935-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 11/30/2017] [Indexed: 12/23/2022] Open
Abstract
Toll-like receptor 5 (TLR5) recognition of flagellin instigates inflammatory signalling. Significant sequence variation in TLR5 exists between animal species but its impact on activity is less well understood. Building on our previous research that bovine TLR5 (bTLR5) is functional, we compared human and bovine TLR5 activity and signalling in cognate cell lines. bTLR5 induced higher levels of CXCL8 when expressed in bovine cells and reciprocal results were found for human TLR5 (hTLR5) in human cells, indicative of host cell specificity in this response. Analysis of Toll/interleukin-1 receptor (TIR) sequences indicated that these differential responses involve cognate MyD88 recognition. siRNA knockdowns and inhibitor experiments demonstrated that there are some host differences in signalling. Although, PI3K activation is required for bTLR5 signalling, mutating bTLR5 F798 to hTLR5 Y798 within a putative PI3K motif resulted in a significantly reduced response. All ruminants have F798 in contrast to most other species, suggesting that TLR5 signalling has evolved differently in ruminants. Evolutionary divergence between bovine and human TLR5 was also apparent in relation to responses measured to diverse bacterial flagellins. Our results underscore the importance of species specific studies and how differences may alter efficacy of TLR-based vaccine adjuvants.
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Affiliation(s)
- Amin Tahoun
- Division of Immunity and Infection, The Roslin Institute and R(D)SVS, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK.,Faculty of Veterinary Medicine, Kafrelsheikh University, 33516, Kafr el-Sheikh, Egypt
| | - Kirsty Jensen
- Division of Immunity and Infection, The Roslin Institute and R(D)SVS, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Yolanda Corripio-Miyar
- Division of Immunity and Infection, The Roslin Institute and R(D)SVS, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK.,Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, EH26 OPZ, UK
| | - Sean McAteer
- Division of Immunity and Infection, The Roslin Institute and R(D)SVS, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - David G E Smith
- Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, EH26 OPZ, UK.,University of Glasgow, Glasgow, G12 8TA, UK.,Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot Watt University, Edinburgh, EH14 4AS, UK
| | - Tom N McNeilly
- Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, EH26 OPZ, UK
| | - David L Gally
- Division of Immunity and Infection, The Roslin Institute and R(D)SVS, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - Elizabeth J Glass
- Division of Immunity and Infection, The Roslin Institute and R(D)SVS, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK.
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Jeong J, Kim S, Lim DS, Kim SH, Doh H, Kim SD, Song YS. TLR5 Activation through NF-κB Is a Neuroprotective Mechanism of Postconditioning after Cerebral Ischemia in Mice. Exp Neurobiol 2017; 26:213-226. [PMID: 28912644 PMCID: PMC5597552 DOI: 10.5607/en.2017.26.4.213] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Revised: 07/22/2017] [Accepted: 08/18/2017] [Indexed: 12/24/2022] Open
Abstract
Postconditioning has been shown to protect the mouse brain from ischemic injury. However, the neuroprotective mechanisms of postconditioning remain elusive. We have found that toll-like receptor 5 (TLR5) plays an integral role in postconditioning-induced neuroprotection through Akt/nuclear factor kappa B (NF-κB) activation in cerebral ischemia. Compared to animals that received 30 min of transient middle cerebral artery occlusion (tMCAO) group, animals that also underwent postconditioning showed a significant reduction of up to 60.51% in infarct volume. Postconditioning increased phospho-Akt (p-Akt) levels and NF-κB translocation to the nucleus as early as 1 h after tMCAO and oxygen-glucose deprivation. Furthermore, inhibition of Akt by Akt inhibitor IV decreased NF-κB promoter activity after postconditioning. Immunoprecipitation showed that interactions between TLR5, MyD88, and p-Akt were increased from postconditioning both in vivo and in vitro. Similar to postconditioning, flagellin, an agonist of TLR5, increased NF-κB nuclear translocation and Akt phosphorylation. Our results suggest that postconditioning has neuroprotective effects by activating NF-κB and Akt survival pathways via TLR5 after cerebral ischemia. Additionally, the TLR5 agonist flagellin can simulate the neuroprotective mechanism of postconditioning in cerebral ischemia.
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Affiliation(s)
- Jaewon Jeong
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - Soojin Kim
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - Da-Sol Lim
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - Seo-Hea Kim
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - Heeju Doh
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - So-Dam Kim
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - Yun Seon Song
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
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Saurat T, Buron F, Rodrigues N, de Tauzia ML, Colliandre L, Bourg S, Bonnet P, Guillaumet G, Akssira M, Corlu A, Guillouzo C, Berthier P, Rio P, Jourdan ML, Bénédetti H, Routier S. Design, Synthesis, and Biological Activity of Pyridopyrimidine Scaffolds as Novel PI3K/mTOR Dual Inhibitors. J Med Chem 2014; 57:613-31. [DOI: 10.1021/jm401138v] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thibault Saurat
- Institut
de Chimie Organique et Analytique, Université d’Orléans, UMR CNRS 7311, Rue de Chartres, BP 6759, 45067 OrléansCedex
2, France
- Centre de Biophysique Moléculaire, CNRS Orléans, Rue Charles Sadron, 45071 Orléans, France
| | - Frédéric Buron
- Institut
de Chimie Organique et Analytique, Université d’Orléans, UMR CNRS 7311, Rue de Chartres, BP 6759, 45067 OrléansCedex
2, France
| | - Nuno Rodrigues
- Institut
de Chimie Organique et Analytique, Université d’Orléans, UMR CNRS 7311, Rue de Chartres, BP 6759, 45067 OrléansCedex
2, France
| | | | - Lionel Colliandre
- Institut
de Chimie Organique et Analytique, Université d’Orléans, UMR CNRS 7311, Rue de Chartres, BP 6759, 45067 OrléansCedex
2, France
| | - Stéphane Bourg
- Institut
de Chimie Organique et Analytique, Université d’Orléans, UMR CNRS 7311, Rue de Chartres, BP 6759, 45067 OrléansCedex
2, France
- Centre de Biophysique Moléculaire, CNRS Orléans, Rue Charles Sadron, 45071 Orléans, France
| | - Pascal Bonnet
- Institut
de Chimie Organique et Analytique, Université d’Orléans, UMR CNRS 7311, Rue de Chartres, BP 6759, 45067 OrléansCedex
2, France
| | - Gérald Guillaumet
- Institut
de Chimie Organique et Analytique, Université d’Orléans, UMR CNRS 7311, Rue de Chartres, BP 6759, 45067 OrléansCedex
2, France
| | - Mohamed Akssira
- Équipe de Chimie Bioorganique & Analytique, URAC 22, Université Hassan II Mohammedia-Casablanca, BP 146, 28800 Mohammedia, Morocco
| | - Anne Corlu
- Hôpital
de Pontchaillou, Université de Rennes 1, INSERM, UMR-991, 65033 Rennes Cedex, France
| | - Christiane Guillouzo
- Hôpital
de Pontchaillou, Université de Rennes 1, INSERM, UMR-991, 65033 Rennes Cedex, France
| | - Pauline Berthier
- Faculté
de Médecine, Centre Hospitalier Universitaire (CHU) Tours, INSERM U1069, 10 Boulevard Tonnellé, 37032 Tours Cedex, France
| | - Pascale Rio
- Faculté
de Médecine, Centre Hospitalier Universitaire (CHU) Tours, INSERM U1069, 10 Boulevard Tonnellé, 37032 Tours Cedex, France
| | - Marie-Lise Jourdan
- Faculté
de Médecine, Centre Hospitalier Universitaire (CHU) Tours, INSERM U1069, 10 Boulevard Tonnellé, 37032 Tours Cedex, France
| | - Hélène Bénédetti
- Centre de Biophysique Moléculaire, CNRS Orléans, Rue Charles Sadron, 45071 Orléans, France
| | - Sylvain Routier
- Institut
de Chimie Organique et Analytique, Université d’Orléans, UMR CNRS 7311, Rue de Chartres, BP 6759, 45067 OrléansCedex
2, France
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Ge Q, Moir LM, Trian T, Niimi K, Poniris M, Shepherd PR, Black JL, Oliver BG, Burgess JK. The phosphoinositide 3'-kinase p110δ modulates contractile protein production and IL-6 release in human airway smooth muscle. J Cell Physiol 2012; 227:3044-52. [PMID: 22015454 DOI: 10.1002/jcp.23046] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Transforming growth factor (TGF) β1 increases pro-inflammatory cytokines and contractile protein expression by human airway smooth muscle (ASM) cells, which could augment airway inflammation and hyperresponsiveness. Phosphoinositide 3' kinase (PI3K) is one of the signaling pathways implicated in TGFβ1 stimulation, and may be altered in asthmatic airways. This study compared the expression of PI3K isoforms by ASM cells from donors with asthma (A), chronic obstructive pulmonary disease (COPD), or neither disease (NA), and investigated the role of PI3K isoforms in the production of TGFβ1 induced pro-inflammatory cytokine and contractile proteins in ASM cells. A cells expressed higher basal levels of p110δ mRNA compared to NA and COPD cells; however COPD cells produced more p110δ protein. TGFβ1 increased 110δ mRNA expression to the same extent in the three groups. Neither the p110δ inhibitor IC87114 (1, 10, 30 µM), the p110β inhibitor TGX221 (0.1, 1, 10 µM) nor the PI3K pan inhibitor LY294002 (3, 10 µM) had any effect on basal IL-6, calponin or smooth muscle α-actin (α-SMA) expression. However, TGFβ1 increased calponin and α-SMA expression was inhibited by IC87114 and LY294002 in all three groups. IC87114, TGX221, and LY294002 reduced TGFβ1 induced IL-6 release in a dose related manner in all groups of ASM cells. PI3K p110δ is important for TGFβ1 induced production of the contractile proteins calponin and α-SMA and the proinflammatory cytokine IL-6 in ASM cells, and may therefore be relevant as a potential therapeutic target to treat both inflammation and airway remodeling.
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Affiliation(s)
- Qi Ge
- Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW, Australia.
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