Abstract
Toll-like receptors (TLR) are pattern-recognition receptors that recognize a broad variety of structurally conserved molecules derived from microbes. The recognition of TLR ligands functions as a primary sensor of the innate immune system, leading to subsequent indirect activation of the adaptive immunity as well as none-immune cells. However, TLR are also expressed by several T cell subsets, and the respective ligands can directly modulate their effector functions. The present review summarizes the recent findings of γδ T cell modulation by TLR ligands. TLR1/2/6, 3, and 5 ligands can act directly in combination with T cell receptor (TCR) stimulation to enhance cytokine/chemokine production of freshly isolated human γδ T cells. In contrast to human γδ T cells, murine and bovine γδ T cells can directly respond to TLR2 ligands with increased proliferation and cytokine production in a TCR-independent manner. Indirect stimulatory effects on IFN-γ production of human and murine γδ T cells via TLR-ligand activated dendritic cells have been described for TLR2, 3, 4, 7, and 9 ligands. In addition, TLR3 and 7 ligands indirectly increase tumor cell lysis by human γδ T cells, whereas ligation of TLR8 abolishes the suppressive activity of human tumor-infiltrating Vδ1 γδ T cells on αβ T cells and dendritic cells. Taken together, these data suggest that TLR-mediated signals received by γδ T cells enhance the initiation of adaptive immune responses during bacterial and viral infection directly or indirectly. Moreover, TLR ligands enhance cytotoxic tumor responses of γδ T cells and regulate the suppressive capacity of γδ T cells.
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References
Hayday AC (2000) γδ cells: a right time and a right place for a conserved third way of protection. Annu Rev Immunol 18:975–1026
Kabelitz D, Glatzel A, Wesch D (2000) Antigen recognition by human γδ T lymphocytes. Int Arch Allergy Immunol 122:1–7
Kabelitz D, Marischen L, Oberg HH, Holtmeier W, Wesch D (2005) Epithelial defence by γδ T cells. Int Arch Allergy Immunol 137:73–81
Wesch D, Marischen L, Kabelitz D (2005) Regulation of cytokine production by γδ T cells. Curr Med Chem Anti-Inflamm Anti-Allergy Agents 4:153–160
Hintz M, Reichenberg A, Altincicek B, Bahr U, Gschwind RM, Kollas AK, Beck E, Wiesner J, Eberl M, Jomaa H (2001) Identification of (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate as a major activator for human γδ T cells in Escherichia coli. FEBS Lett 509:317–322
Groh V, Steinle A, Bauer S, Spies T (1998) Recognition of stress-induced MHC molecules by intestinal epithelial γδ T cells. Science 279:1737–1740
Spada FM, Grant EP, Peters PJ, Sugita M, Melian A, Leslie DS, Lee HK, van Donsellar E, Hanson DA, Krensky AM, Majdic O, Porcelli SA, Morita CT, Brenner MB (2000) Self-recognition of CD1 by γδ T cells: implications for innate immunity. J Exp Med 191:937–948
Heilig JS, Tonegawa S (1986) Diversity of murine γ genes and expression in fetal and adult T lymphocytes. Nature 322:836–840
Bonneville M, O’Brien RL, Born WK (2010) γδ T cell effector functions: a blend of innate programming and acquired plasticity. Nat Rev Immunol 10:467–478
Born WK, Yin Z, Hahn YS, Sun D, O’Brien RL (2010) Analysis of γδ T cell functions in the mouse. J Immunol 184:4055–4061
Chang ZL (2010) Important aspects of Toll-like receptors, ligands and their signaling pathways. Inflamm Res 59:791–808
Kawai T, Akira S (2010) The role of pattern-recognition receptors in innate immunity: update on Toll-like receptors. Nat Immunol 11:373–384
Kabelitz D, Wesch D, Oberg HH (2006) Regulation of regulatory T cells: role of dendritic cells and Toll-like receptors. Crit Rev Immunol 26:291–306
Kabelitz D (2007) Expression and function of Toll-like receptors in T lymphocytes. Curr Opin Immunol 19:39–45
Kulkarni R, Behboudi S, Sharif S (2011) Insights into the role of Toll-like receptors in modulation of T cell responses. Cell Tissue Res 343:141–152
Pietschmann K, Beetz S, Welte S, Martens I, Gruen J, Oberg HH, Wesch D, Kabelitz D (2009) Toll-like receptor expression and function in subsets of human γδ T lymphocytes. Scand J Immunol 70:245–255
Wesch D, Beetz S, Oberg HH, Marget M, Krengel K, Kabelitz D (2006) Direct costimulatory effect of TLR3 ligand poly(I:C) on human γδ T lymphocytes. J Immunol 176:1348–1354
Belvin MP, Anderson KV (1996) A conserved signaling pathway: the Drosophila Toll-dorsal pathway. Annu Rev Cell Dev Biol 12:393–416
Lemaitre B, Nicolas E, Michaut L, Reichhart JM, Hoffmann JA (1996) The dorsoventral regulatory gene cassette spatzle/Toll/cactus controls the potent antifungal response in Drosophila adults. Cell 86:973–983
Medzhitov R, Preston-Hurlburt P, Janeway CA Jr (1997) A human homologue of the Drosophila Toll protein signals activation of adaptive immunity. Nature 388:394–397
Kawai T, Akira S (2009) The roles of TLRs, RLRs and NLRs in pathogen recognition. Int Immunol 21:317–337
Kumar H, Kawai T, Akira S (2009) Toll-like receptors and innate immunity. Biochem Biophys Res Commun 388:621–625
Matsushima N, Tanaka T, Enkhbayar P, Mikami T, Taga M, Yamada K, Kuroki Y (2007) Comparative sequence analysis of leucine-rich repeats (LRRs) within vertebrate Toll-like receptors. BMC Genomics 8:124
O’Neill LA, Bowie AG (2007) The family of five: TIR-domain-containing adaptors in Toll-like receptor signalling. Nat Rev Immunol 7:353–364
Kawai T, Akira S (2007) TLR signaling. Semin Immunol 19:24–32
Akira S, Uematsu S, Takeuchi O (2006) Pathogen recognition and innate immunity. Cell 124:783–801
Kim YM, Brinkmann MM, Paquet ME, Ploegh HL (2008) UNC93B1 delivers nucleotide-sensing Toll-like receptors to endolysosomes. Nature 452:234–238
Takahashi K, Shibata T, Akashi-Takamura S, Kiyokawa T, Wakabayashi Y, Tanimura N, Kobayashi T, Matsumoto F, Fukui R, Kouro T, Nagai Y, Takatsu K, Saitoh S, Miyake K (2007) A protein associated with Toll-like receptor (TLR) 4 (PRAT4A) is required for TLR-dependent immune responses. J Exp Med 204:2963–2976
O’Neill LA, Bryant CE, Doyle SL (2009) Therapeutic targeting of Toll-like receptors for infectious and inflammatory diseases and cancer. Pharmacol Rev 61:177–197
Warshakoon HJ, Hood JD, Kimbrell MR, Malladi S, Wu WY, Shukla NM, Agnihotri G, Sil D, David SA (2009) Potential adjuvantic properties of innate immune stimuli. Hum Vaccin 5:381–394
Coats SR, Pham TT, Bainbridge BW, Reife RA, Darveau RP (2005) MD-2 mediates the ability of tetra-acylated and penta-acylated lipopolysaccharides to antagonize Escherichia coli lipopolysaccharide at the TLR4 signaling complex. J Immunol 175:4490–4498
Gursel I, Gursel M, Yamada H, Ishii KJ, Takeshita F, Klinman DM (2003) Repetitive elements in mammalian telomeres suppress bacterial DNA-induced immune activation. J Immunol 171:1393–1400
Hornung V, Rothenfusser S, Britsch S, Krug A, Jahrsdorfer B, Giese T, Endres S, Hartmann G (2002) Quantitative expression of Toll-like receptor 1–10 mRNA in cellular subsets of human peripheral blood mononuclear cells and sensitivity to CpG oligodeoxynucleotides. J Immunol 168:4531–4537
Deetz CO, Hebbeler AM, Propp NA, Cairo C, Tikhonov I, Pauza CD (2006) Gamma interferon secretion by human Vγ2 Vδ2 T cells after stimulation with antibody against the T-cell receptor plus the Toll-like receptor 2 agonist Pam3Cys. Infect Immun 74:4505–4511
Devilder MC, Allain S, Dousset C, Bonneville M, Scotet E (2009) Early triggering of exclusive IFN-gamma responses of human Vγ9Vδ2 T cells by TLR-activated myeloid and plasmacytoid dendritic cells. J Immunol 183:3625–3633
Hedges JF, Lubick KJ, Jutila MA (2005) γδ T cells respond directly to pathogen-associated molecular patterns. J Immunol 174:6045–6053
Ohnesorge S, Oberg HH, Peters C, Janssen O, Kabelitz D, Wesch D (2009) Differential poly(I:C) responses of human Vγ9Vδ2 T cells stimulated with pyrophosphates versus aminobisphosphonates. Open Immuol J 2:135–142
Beetz S, Wesch D, Marischen L, Welte S, Oberg HH, Kabelitz D (2008) Innate immune functions of human γδ T cells. Immunobiology 213:173–182
Cui Y, Kang L, Cui L, He W (2009) Human γδ T cell recognition of lipid A is predominately presented by CD1b or CD1c on dendritic cells. Biol Direct 4:1–12
Kunzmann V, Kretzschmar E, Herrmann T, Wilhelm M (2004) Polyinosinic-polycytidylic acid-mediated stimulation of human γδ T cells via CD11c dendritic cell-derived type I interferons. Immunology 112:369–377
Rothenfusser S, Hornung V, Krug A, Towarowski A, Krieg AM, Endres S, Hartmann G (2001) Distinct CpG oligonucleotide sequences activate human γδ T cells via interferon-alpha/-beta. Eur J Immunol 31:3525–3534
Shrestha N, Ida JA, Lubinski AS, Pallin M, Kaplan G, Haslett PA (2005) Regulation of acquired immunity by γδ T-cell/dendritic-cell interactions. Ann N Y Acad Sci 1062:79–94
Shojaei H, Oberg HH, Juricke M, Marischen L, Kunz M, Mundhenke C, Gieseler F, Kabelitz D, Wesch D (2009) Toll-like receptors 3 and 7 agonists enhance tumor cell lysis by human γδ T cells. Cancer Res 69:8710–8717
Gibbons DL, Haque SF, Silberzahn T, Hamilton K, Langford C, Ellis P, Carr R, Hayday AC (2009) Neonates harbour highly active γδ T cells with selective impairments in preterm infants. Eur J Immunol 39:1794–1806
Collins C, Shi C, Russell JQ, Fortner KA, Budd RC (2008) Activation of γδ T cells by Borrelia burgdorferi is indirect via a TLR- and caspase-dependent pathway. J Immunol 181:2392–2398
Peng G, Wang HY, Peng W, Kiniwa Y, Seo KH, Wang RF (2007) Tumor-infiltrating γδ T cells suppress T and dendritic cell function via mechanisms controlled by a unique Toll-like receptor signaling pathway. Immunity 27:334–348
Buwitt-Beckmann U, Heine H, Wiesmuller KH, Jung G, Brock R, Ulmer AJ (2005) Lipopeptide structure determines TLR2-dependent cell activation level. FEBS J 272:6354–6364
Dziarski R, Gupta D (2006) The peptidoglycan recognition proteins (PGRPs). Genome Biol 7:232–245
Schroder NW, Morath S, Alexander C, Hamann L, Hartung T, Zahringer U, Gobel UB, Weber JR, Schumann RR (2003) Lipoteichoic acid (LTA) of Streptococcus pneumoniae and Staphylococcus aureus activates immune cells via Toll-like receptor (TLR)-2, lipopolysaccharide-binding protein (LBP), and CD14, whereas TLR-4 and MD-2 are not involved. J Biol Chem 278:15587–15594
Hasan U, Chaffois C, Gaillard C, Saulnier V, Merck E, Tancredi S, Guiet C, Briere F, Vlach J, Lebecque S, Trinchieri G, Bates EE (2005) Human TLR10 is a functional receptor, expressed by B cells and plasmacytoid dendritic cells, which activates gene transcription through MyD88. J Immunol 174:2942–2950
Hoebe K, Georgel P, Rutschmann S, Du X, Mudd S, Crozat K, Sovath S, Shamel L, Hartung T, Zahringer U, Beutler B (2005) CD36 is a sensor of diacylglycerides. Nature 433:523–527
Melkamu T, Squillace D, Kita H, O’Grady SM (2009) Regulation of TLR2 expression and function in human airway epithelial cells. J Membr Biol 229:101–113
Buwitt-Beckmann U, Heine H, Wiesmuller KH, Jung G, Brock R, Akira S, Ulmer AJ (2005) Toll-like receptor 6-independent signaling by diacylated lipopeptides. Eur J Immunol 35:282–289
Hajjar AM, O’Mahony DS, Ozinsky A, Underhill DM, Aderem A, Klebanoff SJ, Wilson CB (2001) Cutting edge: functional interactions between Toll-like receptor (TLR) 2 and TLR1 or TLR6 in response to phenol-soluble modulin. J Immunol 166:15–19
Okusawa T, Fujita M, Nakamura J, Into T, Yasuda M, Yoshimura A, Hara Y, Hasebe A, Golenbock DT, Morita M, Kuroki Y, Ogawa T, Shibata K (2004) Relationship between structures and biological activities of mycoplasmal diacylated lipopeptides and their recognition by Toll-like receptors 2 and 6. Infect Immun 72:1657–1665
Takeuchi O, Kawai T, Muhlradt PF, Morr M, Radolf JD, Zychlinsky A, Takeda K, Akira S (2001) Discrimination of bacterial lipoproteins by Toll-like receptor 6. Int Immunol 13:933–940
Rose WA, McGowin CL, Pyles RB (2009) FSL-1, a bacterial-derived Toll-like receptor 2/6 agonist, enhances resistance to experimental HSV-2 infection. Virol J 6:195
Lu H, Yang Y, Gad E, Wenner CA, Chang A, Larson ER, Dang Y, Martzen M, Standish LJ, Disis ML (2011) Polysaccharide Krestin is a novel TLR2 agonist that mediates inhibition of tumor growth via stimulation of CD8 T cells and NK cells. Clin Cancer Res 17:67–76
Meng YL, Liu Z, Rosen BP (2004) As(III) and Sb(III) uptake by GlpF and efflux by ArsB in Escherichia coli. J Biol Chem 279:18334–18341
Spiller S, Elson G, Ferstl R, Dreher S, Mueller T, Freudenberg M, Daubeuf B, Wagner H, Kirschning CJ (2008) TLR4-induced IFN-γ production increases TLR2 sensitivity and drives Gram-negative sepsis in mice. J Exp Med 205:1747–1754
Oberg HH, Ly TT, Ussat S, Meyer T, Kabelitz D, Wesch D (2010) Differential but direct abolishment of human regulatory T cell suppressive capacity by various TLR2 ligands. J Immunol 184:4733–4740
Mokuno Y, Matsuguchi T, Takano M, Nishimura H, Washizu J, Ogawa T, Takeuchi O, Akira S, Nimura Y, Yoshikai Y (2000) Expression of Toll-like receptor 2 on γδ T cells bearing invariant V γ 6/V δ 1 induced by Escherichia coli infection in mice. J Immunol 165:931–940
Martin B, Hirota K, Cua DJ, Stockinger B, Veldhoen M (2009) Interleukin-17-producing γδ T cells selectively expand in response to pathogen products and environmental signals. Immunity 31:321–330
Schwacha MG, Daniel T (2008) Up-regulation of cell surface Toll-like receptors on circulating γδ T-cells following burn injury. Cytokine 44:328–334
Li H, Luo K, Pauza CD (2008) TNF-α is a positive regulatory factor for human Vγ2 Vδ2 T cells. J Immunol 181:7131–7137
Takeuchi O, Sato S, Horiuchi T, Hoshino K, Takeda K, Dong Z, Modlin RL, Akira S (2002) Cutting edge: role of Toll-like receptor 1 in mediating immune response to microbial lipoproteins. J Immunol 169:10–14
Lubick K, Jutila MA (2006) LTA recognition by bovine γδ T cells involves CD36. J Leukoc Biol 79:1268–1270
Leclercq G, Plum J (1995) Stimulation of TCR Vγ3 cells by Gram-negative bacteria. J Immunol 154:5313–5319
Toth B, Alexander M, Daniel T, Chaudry IH, Hubbard WJ, Schwacha MG (2004) The role of γδ T cells in the regulation of neutrophil-mediated tissue damage after thermal injury. J Leukoc Biol 76:545–552
Matsushima A, Ogura H, Fujita K, Koh T, Tanaka H, Sumi Y, Yoshiya K, Hosotsubo H, Kuwagata Y, Shimazu T, Sugimoto H (2004) Early activation of γδ T lymphocytes in patients with severe systemic inflammatory response syndrome. Shock 22:11–15
Bochud PY, Hawn TR, Aderem A (2003) Cutting edge: a Toll-like receptor 2 polymorphism that is associated with lepromatous leprosy is unable to mediate mycobacterial signaling. J Immunol 170:3451–3454
Kang TJ, Chae GT (2001) Detection of Toll-like receptor 2 (TLR2) mutation in the lepromatous leprosy patients. FEMS Immunol Med Microbiol 31:53–58
Kang TJ, Lee SB, Chae GT (2002) A polymorphism in the Toll-like receptor 2 is associated with IL-12 production from monocyte in lepromatous leprosy. Cytokine 20:56–62
Krutzik SR, Ochoa MT, Sieling PA, Uematsu S, Ng YW, Legaspi A, Liu PT, Cole ST, Godowski PJ, Maeda Y, Sarno EN, Norgard MV, Brennan PJ, Akira S, Rea TH, Modlin RL (2003) Activation and regulation of Toll-like receptors 2 and 1 in human leprosy. Nat Med 9:525–532
Alexopoulou L, Holt AC, Medzhitov R, Flavell RA (2001) Recognition of double-stranded RNA and activation of NF-κB by Toll-like receptor 3. Nature 413:732–738
Kariko K, Bhuyan P, Capodici J, Weissman D (2004) Small interfering RNAs mediate sequence-independent gene suppression and induce immune activation by signaling through Toll-like receptor 3. J Immunol 172:6545–6549
Bell JK, Askins J, Hall PR, Davies DR, Segal DM (2006) The dsRNA binding site of human Toll-like receptor 3. Proc Natl Acad Sci USA 103:8792–8797
Wang T, Town T, Alexopoulou L, Anderson JF, Fikrig E, Flavell RA (2004) Toll-like receptor 3 mediates West Nile virus entry into the brain causing lethal encephalitis. Nat Med 10:1366–1373
Tabeta K, Georgel P, Janssen E, Du X, Hoebe K, Crozat K, Mudd S, Shamel L, Sovath S, Goode J, Alexopoulou L, Flavell RA, Beutler B (2004) Toll-like receptors 9 and 3 as essential components of innate immune defense against mouse cytomegalovirus infection. Proc Natl Acad Sci USA 101:3516–3521
Zhang SY, Jouanguy E, Ugolini S, Smahi A, Elain G, Romero P, Segal D, Sancho-Shimizu V, Lorenzo L, Puel A, Picard C, Chapgier A, Plancoulaine S, Titeux M, Cognet C, von BH, Ku CL, Casrouge A, Zhang XX, Barreiro L, Leonard J, Hamilton C, Lebon P, Heron B, Vallee L, Quintana-Murci L, Hovnanian A, Rozenberg F, Vivier E, Geissmann F, Tardieu M, Abel L, Casanova JL (2007) TLR3 deficiency in patients with herpes simplex encephalitis. Science 317:1522–1527
Jasani B, Navabi H, Adams M (2009) Ampligen: a potential Toll-like 3 receptor adjuvant for immunotherapy of cancer. Vaccine 27:3401–3404
Groskreutz DJ, Monick MM, Powers LS, Yarovinsky TO, Look DC, Hunninghake GW (2006) Respiratory syncytial virus induces TLR3 protein and protein kinase R, leading to increased double-stranded RNA responsiveness in airway epithelial cells. J Immunol 176:1733–1740
Hewson CA, Jardine A, Edwards MR, Laza-Stanca V, Johnston SL (2005) Toll-like receptor 3 is induced by and mediates antiviral activity against rhinovirus infection of human bronchial epithelial cells. J Virol 79:12273–12279
Wesch D, Marx S, Kabelitz D (1997) Comparative analysis of α β and γδ T cell activation by Mycobacterium tuberculosis and isopentenyl pyrophosphate. Eur J Immunol 27:952–956
Sciammas R, Kodukula P, Tang Q, Hendricks RL, Bluestone JA (1997) T cell receptor-γ/δ cells protect mice from herpes simplex virus type 1-induced lethal encephalitis. J Exp Med 185:1969–1975
Sciammas R, Bluestone JA (1998) HSV-1 glycoprotein I-reactive TCR γδ cells directly recognize the peptide backbone in a conformationally dependent manner. J Immunol 161:5187–5192
O’Riordan DP, Golden WC, Aucott SW (2006) Herpes simplex virus infections in preterm infants. Pediatrics 118:e1612–e1620
Yoshimura A, Lien E, Ingalls RR, Tuomanen E, Dziarski R, Golenbock D (1999) Cutting edge: recognition of Gram-positive bacterial cell wall components by the innate immune system occurs via Toll-like receptor 2. J Immunol 163:1–5
Akashi-Takamura S, Miyake K (2008) TLR accessory molecules. Curr Opin Immunol 20:420–425
Ismaili J, Rennesson J, Aksoy E, Vekemans J, Vincart B, Amraoui Z, Van LF, Goldman M, Dubois PM (2002) Monophosphoryl lipid A activates both human dendritic cells and T cells. J Immunol 168:926–932
Sasaki S, Hamajima K, Fukushima J, Ihata A, Ishii N, Gorai I, Hirahara F, Mohri H, Okuda K (1998) Comparison of intranasal and intramuscular immunization against human immunodeficiency virus type 1 with a DNA-monophosphoryl lipid A adjuvant vaccine. Infect Immun 66:823–826
Makkouk A, Abdelnoor AM (2009) The potential use of Toll-like receptor (TLR) agonists and antagonists as prophylactic and/or therapeutic agents. Immunopharmacol Immunotoxicol 31:331–338
Shimura H, Nitahara A, Ito A, Tomiyama K, Ito M, Kawai K (2005) Up-regulation of cell surface Toll-like receptor 4-MD2 expression on dendritic epidermal T cells after the emigration from epidermis during cutaneous inflammation. J Dermatol Sci 37:101–110
Fang H, Welte T, Zheng X, Chang GJ, Holbrook MR, Soong L, Wang T (2010) γδ T cells promote the maturation of dendritic cells during West Nile virus infection. FEMS Immunol Med Microbiol 59:71–80
Pieper J, Methner U, Berndt A (2008) Heterogeneity of avian γδ T cells. Vet Immunol Immunopathol 124:241–252
Chalifour A, Jeannin P, Gauchat JF, Blaecke A, Malissard M, N’Guyen T, Thieblemont N, Delneste Y (2004) Direct bacterial protein PAMP recognition by human NK cells involves TLRs and triggers alpha-defensin production. Blood 104:1778–1783
Means TK, Hayashi F, Smith KD, Aderem A, Luster AD (2003) The Toll-like receptor 5 stimulus bacterial flagellin induces maturation and chemokine production in human dendritic cells. J Immunol 170:5165–5175
Crellin NK, Garcia RV, Hadisfar O, Allan SE, Steiner TS, Levings MK (2005) Human CD4+ T cells express TLR5 and its ligand flagellin enhances the suppressive capacity and expression of FOXP3 in CD4+ CD25+ T regulatory cells. J Immunol 175:8051–8059
Vijay-Kumar M, Sanders CJ, Taylor RT, Kumar A, Aitken JD, Sitaraman SV, Neish AS, Uematsu S, Akira S, Williams IR, Gewirtz AT (2007) Deletion of TLR5 results in spontaneous colitis in mice. J Clin Invest 117:3909–3921
Gewirtz AT, Vijay-Kumar M, Brant SR, Duerr RH, Nicolae DL, Cho JH (2006) Dominant-negative TLR5 polymorphism reduces adaptive immune response to flagellin and negatively associates with Crohn’s disease. Am J Physiol Gastrointest Liver Physiol 290:G1157–G1163
Burdelya LG, Krivokrysenko VI, Tallant TC, Strom E, Gleiberman AS, Gupta D, Kurnasov OV, Fort FL, Osterman AL, Didonato JA, Feinstein E, Gudkov AV (2008) An agonist of Toll-like receptor 5 has radioprotective activity in mouse and primate models. Science 320:226–230
Dockrell DH, Kinghorn GR (2001) Imiquimod and resiquimod as novel immunomodulators. J Antimicrob Chemother 48:751–755
Rajagopal D, Paturel C, Morel Y, Uematsu S, Akira S, Diebold SS (2010) Plasmacytoid dendritic cell-derived type I interferon is crucial for the adjuvant activity of Toll-like receptor 7 agonists. Blood 115:1949–1957
Lee HK, Lund JM, Ramanathan B, Mizushima N, Iwasaki A (2007) Autophagy-dependent viral recognition by plasmacytoid dendritic cells. Science 315:1398–1401
Schon MP, Schon M (2008) TLR7 and TLR8 as targets in cancer therapy. Oncogene 27:190–199
Vollmer J, Krieg AM (2009) Immunotherapeutic applications of CpG oligodeoxynucleotide TLR9 agonists. Adv Drug Deliv Rev 61:195–204
Yarovinsky F, Zhang D, Andersen JF, Bannenberg GL, Serhan CN, Hayden MS, Hieny S, Sutterwala FS, Flavell RA, Ghosh S, Sher A (2005) TLR11 activation of dendritic cells by a protozoan profilin-like protein. Science 308:1626–1629
Zhang D, Zhang G, Hayden MS, Greenblatt MB, Bussey C, Flavell RA, Ghosh S (2004) A Toll-like receptor that prevents infection by uropathogenic bacteria. Science 303:1522–1526
Acknowledgements
D. Wesch and D. Kabelitz gratefully acknowledge the financial support within the Priority Program 1110 (Ka 502/8-1-3) and the SFB 415 (project A15) of the Deutsche Forschungsgemeinschaft. We also thank the Werner und Klara Kreitz Stiftung for their grant support.
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Wesch, D., Peters, C., Oberg, HH. et al. Modulation of γδ T cell responses by TLR ligands. Cell. Mol. Life Sci. 68, 2357–2370 (2011). https://doi.org/10.1007/s00018-011-0699-1
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DOI: https://doi.org/10.1007/s00018-011-0699-1