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PMID |
Sentence |
1 |
12297327
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Immune evasion by a novel family of viral PHD/LAP-finger proteins of gamma-2 herpesviruses and poxviruses.
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2 |
12297327
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Recent observations however, suggest that a conserved family of viral proteins is used by both gamma-2 herpesviruses and by poxviruses to downregulate MHC class I.
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3 |
12502858
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The PHD/LAP-domain protein M153R of myxomavirus is a ubiquitin ligase that induces the rapid internalization and lysosomal destruction of CD4.
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4 |
12502858
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Surface expression of CD4 was restored upon overexpression of Hrs, a ubiquitin interaction motif-containing protein that sorts ubiquitinated proteins into endosomes.
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5 |
12502858
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Moreover, the purified PHD/LAP zinc finger of M153R catalyzed the formation of multiubiquitin adducts in vitro.
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6 |
12502858
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The PHD/LAP-domain protein M153R of myxomavirus is a ubiquitin ligase that induces the rapid internalization and lysosomal destruction of CD4.
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7 |
12502858
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Surface expression of CD4 was restored upon overexpression of Hrs, a ubiquitin interaction motif-containing protein that sorts ubiquitinated proteins into endosomes.
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8 |
12502858
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Moreover, the purified PHD/LAP zinc finger of M153R catalyzed the formation of multiubiquitin adducts in vitro.
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9 |
14530357
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PDCs, which express TLR7 and TLR9, responded to imidazoquinolines (imiquimod and R-848) and to CpG oligodeoxynucleotides stimulation, resulting in enhancement in expression of costimulatory molecules and induction of IFN-alpha and IL-12p70.
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10 |
14530357
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In contrast, MDCs, which express TLR3, TLR4, and TLR7, responded to poly(I:C), LPS, and imidazoquinolines with phenotypic maturation and high production of IL-12 p70 without producing detectable IFN-alpha.
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11 |
14530357
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Optimally TLR ligand-stimulated PDCs or MDCs exposed to CMV or HIV-1 Ags enhanced autologous CMV- and HIV-1-specific memory T cell responses as measured by effector cytokine production compared with TLR ligand-activated monocytes and B cells or unstimulated PDCs and MDCs.
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12 |
14722266
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Poxviruses and gamma-2 herpesviruses share the K3 family of viral immune evasion proteins that inhibit the surface expression of glycoproteins such as major histocompatibility complex class I (MHC-I), B7.2, ICAM-1, and CD95(Fas).
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13 |
14722266
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K3 family proteins contain an amino-terminal PHD/LAP or RING-CH domain followed by two transmembrane domains.
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14 |
14722266
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Two closely related proteins, MARCH-IV and MARCH-IX, reduced surface expression of MHC-I molecules.
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15 |
14722266
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In the presence of MARCH-IV or MARCH-IX, MHC-I was ubiquitinated and rapidly internalized by endocytosis, whereas MHC-I molecules lacking lysines in their cytoplasmic tail were resistant to downregulation.
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16 |
15265893
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There are two principle subsets of dendritic cells (DCs); CD11c(+)CD123(-) myeloid DCs (MDCs) and CD11c(-)CD123(+) plasmacytoid DCs (PDCs).
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17 |
15265893
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Using lineage (Lin) markers to exclude non-DCs, Lin(-)HLA-DR(+)CD11c(+)CD123(-) MDCs and Lin(-)HLA-DR(+)CD11c(-)CD123(+) PDCs were identified in the blood of uninfected macaques and healthy macaques infected with SIV or simian-human immunodeficiency virus.
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18 |
15265893
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Overnight culture of DC-enriched Lin-depleted cells increased CD80 and CD86 expression.
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19 |
15265893
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IL-12 production and CD80/CD86 expression by MDC/PDC mixtures was further enhanced by CD40L and ISS-ODN treatment.
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20 |
15265893
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A CpG-B ISS-ODN increased CD80/CD86 expression by PDCs, but resulted in little IFN-alpha secretion unless IL-3 was added.
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21 |
15265893
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In contrast, a CpG-C ISS-ODN and aldrithiol-2-inactivated (AT-2) SIV induced considerable PDC activation and IFN-alpha release without needing exogenous IL-3.
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22 |
15265893
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The CpG-C ISS-ODN also stimulated IL-12 release (unlike AT-2 SIV) and augmented DC immunostimulatory activity, increasing SIV-specific T cell IFN-gamma production induced by AT-2 SIV-presenting MDC/PDC-enriched mixtures.
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23 |
15265893
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These data highlight the functional capacities of MDCs and PDCs in naive as well as healthy, infected macaques, revealing a promising CpG-C ISS-ODN-driven DC activation strategy that boosts immune function to augment preventative and therapeutic vaccine efficacy.
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24 |
15967828
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Soon after HIV-1 exposure, both PDCs and MDCs were able to transfer the virus to T cells in the absence of a productive infection.
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25 |
15967828
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HIV-1 exposure of the MDCs and PDCs did not inhibit their ability to present cytomegalovirus (CMV) antigens and activate CMV-specific memory T cells.
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26 |
15967828
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As a result, both PDCs and MDCs preferentially transmitted HIV-1 to the responding CMV antigen-specific CD4(+) T cells rather than to nonresponding T cells.
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27 |
15967828
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Soon after HIV-1 exposure, both PDCs and MDCs were able to transfer the virus to T cells in the absence of a productive infection.
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28 |
15967828
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HIV-1 exposure of the MDCs and PDCs did not inhibit their ability to present cytomegalovirus (CMV) antigens and activate CMV-specific memory T cells.
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29 |
15967828
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As a result, both PDCs and MDCs preferentially transmitted HIV-1 to the responding CMV antigen-specific CD4(+) T cells rather than to nonresponding T cells.
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30 |
15967828
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Soon after HIV-1 exposure, both PDCs and MDCs were able to transfer the virus to T cells in the absence of a productive infection.
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31 |
15967828
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HIV-1 exposure of the MDCs and PDCs did not inhibit their ability to present cytomegalovirus (CMV) antigens and activate CMV-specific memory T cells.
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32 |
15967828
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As a result, both PDCs and MDCs preferentially transmitted HIV-1 to the responding CMV antigen-specific CD4(+) T cells rather than to nonresponding T cells.
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33 |
16037638
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RAd alone hardly infected PDC (2%) while CD40 retargeting did not improve transduction efficiency, but it did increase PDC maturation (25% CD83 positive cells).
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34 |
16037638
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Accordingly, specific CTL activation by RAd infected PDC was limited (the number of IFNgamma producing CTL was reduced by 75% compared to stimulation with peptide loaded PDC).
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35 |
16037638
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RAd alone hardly infected PDC (2%) while CD40 retargeting did not improve transduction efficiency, but it did increase PDC maturation (25% CD83 positive cells).
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36 |
16037638
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Accordingly, specific CTL activation by RAd infected PDC was limited (the number of IFNgamma producing CTL was reduced by 75% compared to stimulation with peptide loaded PDC).
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37 |
16672547
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Using the SIV-macaque system to advance oral vaccine research, we examined macaque PDC and MDC biology, identifying ways to activate DCs and boost antiviral immunity.
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38 |
16672547
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Immunostimulatory oligodeoxyribonucleotides (ISS-ODNs) stimulated PDC/MDC mixtures to up-regulate co-stimulatory molecule expression and to secrete both IFN-alpha and IL-12.
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39 |
16672547
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Additionally, ISS-ODNs augmented SIV-specific IFN-gamma responses induced by virus-bearing DCs.
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40 |
16672547
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Using the SIV-macaque system to advance oral vaccine research, we examined macaque PDC and MDC biology, identifying ways to activate DCs and boost antiviral immunity.
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41 |
16672547
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Immunostimulatory oligodeoxyribonucleotides (ISS-ODNs) stimulated PDC/MDC mixtures to up-regulate co-stimulatory molecule expression and to secrete both IFN-alpha and IL-12.
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42 |
16672547
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Additionally, ISS-ODNs augmented SIV-specific IFN-gamma responses induced by virus-bearing DCs.
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43 |
16928885
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Considerable numbers of PDC and MDC could be detected in the nasal epithelium.
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44 |
16928885
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Interestingly, PDC and MDC were almost absent from patients who received treatment with glucocorticoids, while very high numbers of PDC were found for patients with recent upper respiratory tract infections.
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45 |
16928885
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Our results demonstrate for the first time a quantitative analysis of PDC and MDC in the healthy nasal epithelium and in nasal epithelia from patients with different pathological conditions.
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46 |
16928885
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Considerable numbers of PDC and MDC could be detected in the nasal epithelium.
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47 |
16928885
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Interestingly, PDC and MDC were almost absent from patients who received treatment with glucocorticoids, while very high numbers of PDC were found for patients with recent upper respiratory tract infections.
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48 |
16928885
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Our results demonstrate for the first time a quantitative analysis of PDC and MDC in the healthy nasal epithelium and in nasal epithelia from patients with different pathological conditions.
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49 |
16928885
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Considerable numbers of PDC and MDC could be detected in the nasal epithelium.
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50 |
16928885
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Interestingly, PDC and MDC were almost absent from patients who received treatment with glucocorticoids, while very high numbers of PDC were found for patients with recent upper respiratory tract infections.
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51 |
16928885
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Our results demonstrate for the first time a quantitative analysis of PDC and MDC in the healthy nasal epithelium and in nasal epithelia from patients with different pathological conditions.
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52 |
19201852
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In response to TLR7/8 stimulation, PDCs mediated the up-regulation of transcription factors B lymphocyte-induced maturation protein 1 and X-box binding protein 1 and enhanced differentiation of B cells into IgM-, IgG-, and IgA-producing cells.
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53 |
19201852
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Although MDCs expressed higher levels of the known B cell growth factors IL-6, IL-10, and B cell-activating factor in response to TLR7/8 stimulation, they were unable to enhance B cell responses in this system.
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54 |
19201852
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These data help decipher the different roles of PDCs and MDCs for modulating human B cell responses and can contribute to selection of specific TLR ligands as vaccine adjuvants.
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55 |
19635913
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This response to CpG treatment manifested 8-12 h and was mediated by a rare population of plasmacytoid dendritic cells (CD19(+) pDC) induced to express the immunosuppressive enzyme IDO after TLR9 ligation.
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56 |
19635913
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When IDO was blocked, CpG treatment did not activate Tregs, but instead stimulated pDCs to uniformly express the proinflammatory cytokine IL-6, which in turn reprogrammed Foxp3-lineage Tregs to express IL-17.
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57 |
20709105
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Expression of selected gene groups was tested via qPCR at 7 different time-points: cytokines (IL-2, IFN-γ, IL-4, IL-6, and IL-10), type I interferons (IFN-α4, IFN-α11, IFN-α12, and IFN-β), toll-like receptors (TLR2, TLR3, TLR7, and TLR9), iNOS and CCR7.
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58 |
20709105
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Intranasally administered DBF and the mixture of virus+DBF induced an elevated expression of IFN-γ, IL-6 and IL-10 cytokines, type I interferons, iNOS, and pDC markers in NALT.
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59 |
21439318
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Positive and double staining for CD11c and BDCA-2, pDC/IPC, DC-LAMP, DC-SIGN, TLR8 and Langerin have been observed revealing new mouse intestinal DC subsets.
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60 |
23729440
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Consistent with their specific receptor expression, skin DCs bound and internalized Env via C-type lectin receptors, whereas blood DC subsets, including CD1c(+) myeloid DCs, CD123(+) plasmacytoid DCs (PDCs), and CD141(+) DCs exhibited a restricted repertoire of C-type lectin receptors and relied on CD4 for uptake of Env.
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61 |
23729440
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Despite a generally poor capacity for Ag uptake compared with myeloid DCs, the high expression of CD4 on PDCs allowed them to bind and internalize Env very efficiently.
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62 |
23729440
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CD4-mediated uptake delivered Env to EEA1(+) endosomes that progressed to Lamp1(+) and MHC class II(+) lysosomes where internalized Env was degraded rapidly.
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63 |
23935491
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Blocking TLR7- and TLR9-mediated IFN-α production by plasmacytoid dendritic cells does not diminish immune activation in early SIV infection.
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64 |
23935491
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We show that pDC are major but not exclusive producers of IFN-α that rapidly become unresponsive to virus stimulation following SIV infection, whereas myeloid DC gain the capacity to produce IFN-α, albeit at low levels. pDC mediate a marked but transient IFN-α response in lymph nodes during the acute phase that is blocked by administration of TLR7 and TLR9 antagonist without impacting pDC recruitment.
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65 |
23935491
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TLR7 and TLR9 blockade did not impact virus load or the acute IFN-α response in plasma and had minimal effect on expression of IFN-stimulated genes in both blood and lymph node.
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66 |
23935491
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TLR7 and TLR9 blockade did not prevent activation of memory CD4+ and CD8+ T cells in blood or lymph node but led to significant increases in proliferation of both subsets in blood following SIV infection.
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67 |
23935491
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Our findings reveal that virus-mediated activation of pDC through TLR7 and TLR9 contributes to substantial but transient IFN-α production following pathogenic SIV infection.
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68 |
25527343
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CD11b(+), Clec9A(+) and CD16(+) conventional (c)DC and CD123(+) plasmacytoid (p)DC) in human atherosclerotic plaques.
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69 |
25527343
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CD123(+) pDC and CD16(+) DC were also detectable in plaques.
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70 |
26026061
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Compared to mice vaccinated with pDC or control mice, mice vaccinated with mDCs generate a robust Th1 type immune response, characterized by high frequency of CD4(+)T-bet(+) T cells and CD8(+)SIINFEKEL(+) T cells.
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71 |
26194553
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In addition to type I interferons, TRAIL and granzyme B contributed to the inhibitory effect of HSV-1 d106S plus pDC to a minor extent.
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72 |
26297760
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Macrophages, but not pDC or mDC, had suppressed capacity to induce IFN-γ release from CD4 T cells in acute infection, even after stimulation with virus-encoded TLR7/8 ligand.
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73 |
26297760
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TLR7/8-stimulated pDC, mDC and macrophages all produced IL-12 in T cell cocultures, which was suppressed in chronic infection.
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74 |
26297760
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Macrophages, but not pDC or mDC, had suppressed capacity to induce IFN-γ release from CD4 T cells in acute infection, even after stimulation with virus-encoded TLR7/8 ligand.
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75 |
26297760
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TLR7/8-stimulated pDC, mDC and macrophages all produced IL-12 in T cell cocultures, which was suppressed in chronic infection.
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