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PMID |
Sentence |
1 |
10602014
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We investigated the composition of proteasomes of DC derived from human peripheral blood monocytes before and after stimulation by CD40L, LPS, or proinflammatory cytokines (TNF-alpha + IL-6 + IL-1beta).
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2 |
10602014
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Immunoprecipitation of proteasomes and analysis on two-dimensional gels revealed that during maturation the inducible proteasome subunits LMP2, LMP7, and MECL-1 are up-regulated and that the neosynthesis of proteasomes is switched exclusively to the production of immunoproteasomes containing these subunits.
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3 |
11162627
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Using the reverse transcription PCR, we evaluated expression levels of various antigen presentation-related genes, including LMP2, LMP7, MECL-1, PA28alpha, PA28beta, TAP1, TAP2, and tapasin, in two oral squamous cell carcinoma cell lines, HSC5 and HSC7.
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4 |
11162627
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Expression levels of LMP2, MECL-1, TAP1, and TAP2 transcripts are reduced in both cell lines in comparison with a normal epithelial cell line.
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5 |
11162627
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Further, HSC5 and HSC7 show diminished expression of LMP7/tapasin, and PA28alpha/beta, respectively.
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6 |
11162627
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Surface expression of HLA-B alleles is down-regulated in both lines presumably due to low expression of TAP1/2.
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7 |
11162627
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Using the reverse transcription PCR, we evaluated expression levels of various antigen presentation-related genes, including LMP2, LMP7, MECL-1, PA28alpha, PA28beta, TAP1, TAP2, and tapasin, in two oral squamous cell carcinoma cell lines, HSC5 and HSC7.
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8 |
11162627
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Expression levels of LMP2, MECL-1, TAP1, and TAP2 transcripts are reduced in both cell lines in comparison with a normal epithelial cell line.
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9 |
11162627
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Further, HSC5 and HSC7 show diminished expression of LMP7/tapasin, and PA28alpha/beta, respectively.
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10 |
11162627
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Surface expression of HLA-B alleles is down-regulated in both lines presumably due to low expression of TAP1/2.
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11 |
14991620
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In vitro stimulation of immature murine DC with MALP-2 resulted in the induction of maturation with up-regulated expression of MHC class II, costimulatory (CD80, CD86) and adhesion (CD40, CD54) molecules.
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12 |
14991620
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MALP-2 also enhances the secretion of cytokines (IL-1alpha, IL-6 and IL-12), and increases DC stimulatory activity on naive and antigen-specific T cells.
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13 |
14991620
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Further studies demonstrated that MALP-2 treatment of DC results in a dose-dependent shift from the protein pattern of proteasomes to immunoproteasomes (up-regulation of LMP2, LMP7 and MECL1), which correlates with an increased proteolytic activity.
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14 |
14997933
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Immunizing transgenic PDAPP mice, which overexpress mutant APP and develop beta-amyloid deposition resembling plaques in Alzheimer's disease (AD), results in a decrease of amyloid burden when compared with non-treated transgenic animals.
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15 |
14997933
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Neuropathological examination in that patient showed meningoencephalitis, and focal atypically low numbers of diffuse and neuritic plaques but not of vascular amyloid, nor regression of tau pathology in neurofibrillary tangles and neuropil threads.
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16 |
14997933
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The present neuropathological study reports the second case of meningoencephalitis following immunization with amyloid-beta peptide in AD, and has been directed toward exploring mechanisms underlying decreased tau pathology in relation with amyloid deposit regression, and possible molecular bases involved in the inflammatory response following immunization.
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17 |
14997933
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Inflammatory infiltrates were composed of CD8+, CD4+, CD3+, CD5+ and, rarely, CD7+ lymphocytes, whereas B lymphocytes and T cytotoxic cells CD16, CD57, TIA and graenzyme were negative.
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18 |
14997933
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Reduced amyloid burden was accompanied by low amyloid-associated oxidative stress responses (reduced superoxide dismutase-1: SOD-1 expression) and by local inhibition of the stress-activated protein kinase/c-Jun N-terminal kinase (SAPK/JNK) and p38 kinase which are involved in tau phosphorylation.
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19 |
14997933
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These results support the amyloid cascade of tau phosphorylation in AD regarding phosphorylation of tau dependent on beta-amyloid deposition in neuritic plaques, but not of tau in neurofibrillary tangles and threads.
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20 |
14997933
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Furthermore, amyloid reduction was accompanied by increased expression of the PA28a/beta inductor, and of LMP7, LMP2 and MECL1 subunits of the immunoproteasome in microglial and inflammatory cells surrounding collapsed plaques, and in multinucleated giant cells.
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21 |
16703666
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Augmentation of epitope presentation by MHC I is thought to be effected by the immunoproteasome, induced in response to IFN-gamma (interferon-gamma) in some cells, and constitutively expressed in others.
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22 |
16703666
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The authors show that Tat deregulates the balance of the three proteins, LMP2 (low-molecular-mass polypeptide 2), LMP7 and MECL1 (multicatalytic endopeptidase complex-like 1), which distinguish the immunoproteasome from the proteasome, and they provide a molecular explanation.
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23 |
16703666
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Intracellular Tat sequesters IRF-1 (interferon-regulatory factor-1) from its cognate promoter element, where normally it associates with STAT1 (signal transducer and activator of transcription 1) to activate basal transcription of the LMP2 gene.
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24 |
17548590
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To determine the mechanism by which the IFN-gamma-inducible proteasome (immuno) subunits enhance the ability of specific pathogen-derived peptides to elicit CD8 T cell responses, we generated a recombinant Listeria monocytogenes strain (rLM-E1) that secretes a model Ag encompassing the immunoproteasome-dependent E1B(192-200) and immunoproteasome-independent E1A(234-243) epitope.
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25 |
17548590
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Analyses of Ag presentation showed that infected gene-deficient professional APCs, lacking the immunosubunits LMP7/ibeta5 and MECL-1/ibeta2, processed and presented the rLM-E1-derived E1B(192-200) epitope but with delayed kinetics.
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26 |
17548590
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Accordingly, infected gene-deficient mice failed to respond to the otherwise immunodominant E1B(192-200) epitope but mounted normal CD8 T cell responses to E1A(234-243) which was processed by the same professional APCs, from the same rLM-E1 Ag.
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27 |
23808166
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The level of transcription of LMP2, LMP7, MECL1 subunits didn't increase for one and two days after a single infection.
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