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<dc:title xml:lang="en">Effect of HIV antiretroviral drugs on antigen processing and epitope presentation by MHC-I to cytotoxic T cells</dc:title>
<dcterms:alternative xml:lang="fr">Effet des antirétroviraux sur la voie d’apprêtement des antigènes et la présentation directe ainsi que croisée des épitopes par les CMH-I</dcterms:alternative>
<dc:subject xml:lang="fr">Apprêtement antigénique</dc:subject>
<dc:subject xml:lang="fr">Présentation croisée</dc:subject>
<dc:subject xml:lang="fr">Lymphocytes CD8 + VIH</dc:subject>
<dc:subject xml:lang="fr">NOX2</dc:subject>
<dc:subject xml:lang="fr">Inhibiteurs de la protéase de la VIH</dc:subject>
<dc:subject xml:lang="fr">Présentation des épitopes</dc:subject>
<dc:subject xml:lang="en">Antigen processing</dc:subject>
<dc:subject xml:lang="en">Epitope presentation</dc:subject>
<dc:subject xml:lang="en">Cross-presentation</dc:subject>
<dc:subject xml:lang="en">HIV CTL</dc:subject>
<dc:subject xml:lang="en">NOX2</dc:subject>
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<tef:elementdEntree autoriteExterne="031751571" autoriteSource="Sudoc">Lymphocytes T cytotoxiques</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="032627297" autoriteSource="Sudoc">Complexe majeur d'histocompatibilité</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="147646529" autoriteSource="Sudoc">Inhibiteurs du protéasome</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">L’apprêtement antigénique par les protéases intracellulaires et la présentation des épitopes sont essentiels pour la reconnaissance des cellules infectées par les lymphocytes CD8+. Ici nous avons montré que certains inhibiteurs de la protéase de la VIH (IPs) modulent l’activité de la protéasome et aminopeptidase impliqué dans l’apprêtement antigénique endogène et l’activité cathepsins importante dans l’apprêtement croisée. Deux IPs agissent directement sur les cathepsins et leurs régulateurs en inhibant les activités kinase, NOX2 et en régulant le pH phagolysosomal. Les IPs ont changé la dégradation des protéines viral et la production des épitopes de façon séquence- et cellule-spécifique, ont altéré la présentation direct et croisée des épitopes, et ont partiellement changé l’auto-peptidome des cellules primaires. La modulation par les drogues de l’apprêtement et la présentation des épitopes peut fournir une approche thérapeutique alternative pour moduler la reconnaissance immunitaire.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Antigen processing by intracellular proteases and peptidases and epitope presentation are critical for recognition of pathogen-infected cells by CD8+ T lymphocytes. Here we show that several HIV protease inhibitors (PIs) prescribed to HIV-infected persons variably modulate proteasome and aminopeptidase activities involved in endogenous antigen presentation and cathepsin activities involved in antigen cross-presentation. Two HIV PIs acted directly on cathepsins and on their regulators by inhibiting kinases, NOX2 and the regulation of phagolysosomal pH, subsequently enhancing cathepsin activities. HIV PIs modified HIV protein degradation and epitope production in a sequence- and cell-dependent manner, altered direct- and cross-presentation and T cell-mediated killing, and partly changed the self-peptidome of primary cells. Drug-induced modulation of antigen processing and peptidome may provide an alternate therapeutic approach to modulate immune recognition.</dcterms:abstract>
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