Search results for "TLR9"

showing 9 items of 19 documents

Precision wormlike nanoadjuvant governs potency of vaccination

2021

It remains unclear how the precise length of one-dimensional nanovehicles influences the characters of vaccination. Here, a unimolecular nanovehicle with tailored size and aspect ratio (AR) is applied to deliver CpG oligodeoxynucleotide, a Toll-like receptor (TLR) 9 agonist, as an adjuvant of recombinant hepatitis B virus surface antigen (rHBsAg), for treating chronic hepatitis B (CHB). Cationic nanovehicles with fixed width (ca. 45 nm) but varied length (46 nm-180 nm), AR from 1 to 4, are prepared through controlled polymerization and are loaded with CpG by electrostatic interaction. We reveal that the nanoadjuvant with AR = 2 shows the highest retention in proximal lymph nodes. Importantl…

Hepatitis B virusCpG OligodeoxynucleotideChemistryMechanical Engineeringmedicine.medical_treatmentVaccinationTLR9BioengineeringGeneral ChemistryCondensed Matter Physicsmedicine.disease_causeMolecular biologyDisease Models AnimalMiceImmune systemCpG siteAdjuvants ImmunologicmedicineAnimalsGeneral Materials ScienceReceptorAdjuvantLate endosome
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Synergistic effect between amoxicillin and TLR ligands on dendritic cells from amoxicillin-delayed allergic patients.

2013

Journal Article; Amoxicillin, a low-molecular-weight compound, is able to interact with dendritic cells inducing semi-maturation in vitro. Specific antigens and TLR ligands can synergistically interact with dendritic cells (DC), leading to complete maturation and more efficient T-cell stimulation. The aim of the study was to evaluate the synergistic effect of amoxicillin and the TLR2, 4 and 7/8 agonists (PAM, LPS and R848, respectively) in TLR expression, DC maturation and specific T-cell response in patients with delayed-type hypersensitivity (DTH) reactions to amoxicillin. Monocyte-derived DC from 15 patients with DTH to amoxicillin and 15 controls were cultured with amoxicillin in the pr…

MaleCélulas dendríticasmedicine.medical_treatmentLymphocyte proliferationPharmacology:Chemicals and Drugs::Chemical Actions and Uses::Specialty Uses of Chemicals::Laboratory Chemicals::Ligands [Medical Subject Headings]Monocytes:Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Primates::Haplorhini::Catarrhini::Hominidae::Humans [Medical Subject Headings]:Phenomena and Processes::Physiological Phenomena::Pharmacological Phenomena::Pharmacological Processes::Drug Interactions::Drug Synergism [Medical Subject Headings]Cells CulturedAmoxicilinaMultidisciplinarymedicine.diagnostic_testChemistryQRLinfocitosImidazolesCitocinasMiddle AgedHumanosCytokineMedicineCytokinesFemaleDrug EruptionsResearch Article:Diseases::Skin and Connective Tissue Diseases::Skin Diseases::Exanthema [Medical Subject Headings]AdultSinergismo medicamentosoScienceFlow cytometryHipersensibilidad retardada:Chemicals and Drugs::Organic Chemicals::Amides::Lactams::beta-Lactams::Penicillins::Penicillin G::Ampicillin::Amoxicillin [Medical Subject Headings]Immune systemAntigen:Diseases::Immune System Diseases::Hypersensitivity::Hypersensitivity Delayed [Medical Subject Headings]ExantemamedicineHypersensitivity:Anatomy::Cells::Blood Cells::Leukocytes::Leukocytes Mononuclear::Lymphocytes [Medical Subject Headings]HumansLigandos:Chemicals and Drugs::Amino Acids Peptides and Proteins::Peptides::Intercellular Signaling Peptides and Proteins::Cytokines [Medical Subject Headings]:Anatomy::Cells::Antigen-Presenting Cells::Dendritic Cells [Medical Subject Headings]TLR9AmoxicillinTLR7Dendritic CellsToll-Like Receptor 2TLR2ImmunologyPloS one
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Autoimmune skin inflammation is dependent on plasmacytoid dendritic cell activation by nucleic acids via TLR7 and TLR9

2010

Lupus-prone mice develop a chronic inflammatory response to cutaneous injury that depends on the production of type I interferon, TLR7, and TLR9.

MaleMice 129 StrainImmunologyGene ExpressionInflammationchemical and pharmacologic phenomenaMice Inbred StrainsReceptor Interferon alpha-betaBiologySkin DiseasesArticleProinflammatory cytokinePathogenesisTLR9MiceAutoimmune skin inflammationimmune system diseasesNucleic AcidsmedicineImmunology and AllergyAnimalsLupus Erythematosus SystemicReceptorskin and connective tissue diseasesTLR7SkinAutoimmune skin inflammation; TLR7; TLR9; plasmacytoid dendritic cells.Mice KnockoutPlasmacytoid dendritic cell activationLupus erythematosusReverse Transcriptase Polymerase Chain ReactionTLR9virus diseaseshemic and immune systemsTLR7DNADendritic Cellsmedicine.diseaseFlow CytometryMice Inbred C57BLplasmacytoid dendritic cells.Toll-Like Receptor 7Toll-Like Receptor 9ImmunologyMyeloid Differentiation Factor 88CytokinesFemalemedicine.symptomThe Journal of Experimental Medicine
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CpG-DNA loaded multifunctional MnO nanoshuttles for TLR9-specific cellular cargo delivery, selective immune-activation and MRI

2012

Initiation of pathways that lead to a proliferation and chemoresistance by Toll-like receptors (TLRs) are an important factor in cancer progression. Multifunctional magnetic nanoparticles equipped with a pathogen-derived ligand (CpG) functioning as TLR agonists were used to show the impact of immune activation on human HNSCC (head and neck squamous cell carcinoma) cells. The response of human cancer cells to TLR signaling is linked to tumor biology. The magnetic MnO nanoparticles were coated with a multifunctional polymer, displaying no cytotoxicity and being able to enter cells while carrying foreign DNA (unmethylated CpG) to recognize intracellular TLR9. Both the particle and the nucleic …

Materials scienceCellTLR9NanotechnologyGeneral Chemistrymedicine.diseaseHead and neck squamous-cell carcinomaCell biologychemistry.chemical_compoundmedicine.anatomical_structureCpG sitechemistryMaterials ChemistrymedicineCytotoxicityReceptorDNAIntracellularJournal of Materials Chemistry
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Excessive CpG 1668 stimulation triggers IL-10 production by cDC that inhibits IFN-alpha responses by pDC.

2008

Upon stimulation with a wide range of concentrations of CpG oligodeoxynucleotide 2216 (CpG 2216), plasmacytoid DC are induced to produce type I IFN (IFN-alpha/beta). In contrast, CpG 1668 shows a bell-shaped dose-response correlation, i.e. only intermediate but not high doses of CpG 1668 induce IFN-alpha/beta. Interestingly, high-dose CpG 1668 completely inhibited IFN-alpha responses induced by CpG 2216. Experiments using supernatant of high-dose CpG-1668-treated cells indicated that secreted inhibitor(s) mediated the IFN-alpha shut-off. Among modulating cytokines, IL-10 turned out to be one important negative regulator. In line with this, supernatants of IL-10-deficient DC cultures stimula…

MuromegalovirusCpG OligodeoxynucleotideImmunologyStimulationmedicine.disease_causeNegative regulatorAutoimmunityMiceAdjuvants ImmunologicmedicineImmunology and AllergyAnimalsCells CulturedbiologyTLR9Interferon-alphaDendritic Cellsbiology.organism_classificationMolecular biologyInterleukin-10Interleukin 10CpG siteOligodeoxyribonucleotidesVesicular stomatitis virusToll-Like Receptor 9ImmunologyCytokinesEuropean journal of immunology
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EBV-Induced Gene 3 Transcription Is Induced by TLR Signaling in Primary Dendritic Cells via NF-κB Activation

2005

Abstract The EBV-induced gene 3 (EBI3) is expressed in dendritic cells (DCs) and part of the cytokine IL-27 that controls Th cell development. However, its regulated expression in DCs is poorly understood. In the present study we demonstrate that EBI3 is expressed in splenic CD8−, CD8+, and plasmacytoid DC subsets and is induced upon TLR signaling. Cloning and functional analysis of the EBI3 promoter using in vivo footprinting and mutagenesis showed that stimulation via TLR2, TLR4, and TLR9 transactivated the promoter in primary DCs via NF-κB and Ets binding sites at −90 and −73 bp upstream of the transcriptional start site, respectively. Furthermore, we observed that NF-κB p50/p65 and PU.1…

RNA Capsmedicine.medical_treatmentDNA Mutational AnalysisMolecular Sequence DataImmunologyAntigen-Presenting CellsReceptors Cell SurfaceBiologyCell LineMinor Histocompatibility AntigensJurkat CellsMiceCell Line TumorGene expressionmedicineAnimalsHumansImmunology and AllergyReceptors CytokinePromoter Regions GeneticGlycoproteinsMice KnockoutMembrane GlycoproteinsInnate immune systemBase SequenceToll-Like ReceptorsHEK 293 cellsNF-kappa BTLR9hemic and immune systemsEBI3Dendritic CellsMolecular biologyToll-Like Receptor 2Up-RegulationMice Inbred C57BLToll-Like Receptor 4Protein SubunitsTLR2CytokineGene Expression RegulationToll-Like Receptor 9NIH 3T3 CellsTLR4Protein BindingSignal TransductionThe Journal of Immunology
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Role of TLR Polymorphisms in Immunosenescence

2009

Innate immunity provides a first line of host defense against infection through microbial recognition and killing while simultaneously activating a clonotypic immune response. Toll-like receptors (TLRs) are principal mediators of rapid microbial recognition and function mainly by detection of pathogen-associated molecular patterns (PAMPs) that do not exist in the host. The different members of TLRs recognize several PAMPs, such as peptidoglycan for TLR2, lipopolysaccharide (LPS) for TLR4, flagellin for TLR5, and CpGDNA-repeats for TLR9. Several endogenous ligands of various TLRs have been also identified in the host. In this chapter, we describe the involvement of TLR-4 polymorphisms in imm…

TLR2Innate immune systemImmune systemTLR5ImmunologyTLR4TLR9ImmunosenescenceBiologyProinflammatory cytokine
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Poly(I:C) and CpG-ODN combined aerosolization to treat lung metastases and counter the immunosuppressive microenvironment.

2015

The immunostimulatory ability of synthetic oligonucleotides containing CpG motifs (CpG-ODN), agonists of Toll-like receptor 9 (TLR9), can be harnessed to promote antitumor immunity by their application at the tumor site to stimulate local activation of innate immunity; however, particularly in the lung, tumor-associated immunosuppression can subvert such antitumor innate immune responses. To locally maintain continuous activation of innate subpopulations while inhibiting immunosuppressive cells, we evaluated aerosol delivery CpG-ODN combined with Poly(I:C), a TLR3 agonist able to convert tumor-supporting macrophages to tumoricidal effectors, in the treatment of B16 melanoma lung metastases …

miceCpG Oligodeoxynucleotidemedicine.medical_treatmentDacarbazineImmunologySettore MED/08 - Anatomia Patologicaaerosol delivery; dacarbazin; lung metastases; mice; TLR agonists; Immunology and Allergy; Oncology; Immunologylung metastaseMedicineCytotoxic T cellImmunology and AllergyTLR agonistAerosolizationOriginal ResearchInnate immune systembusiness.industryTLR9Immunosuppressionhemic and immune systemsrespiratory systemOncologydacarbazinTLR3ImmunologyCancer researchaerosol deliverybusinessmedicine.drug
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Incidence and dynamics of active cytomegalovirus infection in allogeneic stem cell transplant patients according to single nucleotide polymorphisms i…

2014

Single nucleotide polymorphisms (SNPs) in genes involved in the activation or regulation of innate and adaptive immune responses may modulate the susceptibility to and the natural history of certain chronic viral infections. The current study aimed to investigate whether donor and recipient SNPs in the chemokine receptor 5 (rs1800023), monocyte chemoattractant protein 1 (rs13900), interleukin-10 (rs1878672), and Toll-like receptor 9 (rs352140) genes would exert any influence on the rate of incidence and features of CMV DNAemia in the allogeneic stem cell transplantation setting. This was a retrospective observational multicenter study. The cohort consisted of 102 non-consecutive allogeneic …

virus diseasesTLR9Single-nucleotide polymorphismBiologyVirologySNP genotypingTransplantationInterleukin 10Chemokine receptorInfectious DiseasesImmune systemVirologyGenotypeImmunologyJournal of Medical Virology
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