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Blood ; 137(20): 2785-2799, 2021 05 20.
Artículo en Inglés | MEDLINE | ID: mdl-33232972

RESUMEN

Aberrant B-cell receptor/NF-κB signaling is a hallmark feature of B-cell non-Hodgkin lymphomas, especially in diffuse large B-cell lymphoma (DLBCL). Recurrent mutations in this cascade, for example, in CD79B, CARD11, or NFKBIZ, and also in the Toll-like receptor pathway transducer MyD88, all deregulate NF-κB, but their differential impact on lymphoma development and biology remains to be determined. Here, we functionally investigate primary mouse lymphomas that formed in recipient mice of Eµ-myc transgenic hematopoietic stem cells stably transduced with naturally occurring NF-κB mutants. Although most mutants supported Myc-driven lymphoma formation through repressed apoptosis, CARD11- or MyD88-mutant lymphoma cells selectively presented with a macrophage-activating secretion profile, which, in turn, strongly enforced transforming growth factor ß (TGF-ß)-mediated senescence in the lymphoma cell compartment. However, MyD88- or CARD11-mutant Eµ-myc lymphomas exhibited high-level expression of the immune-checkpoint mediator programmed cell death ligand 1 (PD-L1), thus preventing their efficient clearance by adaptive host immunity. Conversely, these mutant-specific dependencies were therapeutically exploitable by anti-programmed cell death 1 checkpoint blockade, leading to direct T-cell-mediated lysis of predominantly but not exclusively senescent lymphoma cells. Importantly, mouse-based mutant MyD88- and CARD11-derived signatures marked DLBCL subgroups exhibiting mirroring phenotypes with respect to the triad of senescence induction, macrophage attraction, and evasion of cytotoxic T-cell immunity. Complementing genomic subclassification approaches, our functional, cross-species investigation unveils pathogenic principles and therapeutic vulnerabilities applicable to and testable in human DLBCL subsets that may inform future personalized treatment strategies.


Asunto(s)
Inmunidad Adaptativa , Proteínas Adaptadoras de Señalización CARD/genética , Senescencia Celular/fisiología , Guanilato Ciclasa/genética , Linfoma de Células B Grandes Difuso/inmunología , Factor 88 de Diferenciación Mieloide/genética , Proteínas de Neoplasias/genética , Linfocitos T Citotóxicos/inmunología , Proteínas Adaptadoras Transductoras de Señales/genética , Animales , Antígeno B7-H1/antagonistas & inhibidores , Antígenos CD79/genética , Línea Celular Tumoral , Quimiotaxis , Regulación Neoplásica de la Expresión Génica , Redes Reguladoras de Genes , Genes Reporteros , Genes myc , Humanos , Inhibidores de Puntos de Control Inmunológico , Linfoma de Células B Grandes Difuso/patología , Linfoma de Células B Grandes Difuso/terapia , Macrófagos/fisiología , Ratones , Ratones Endogámicos C57BL , Ratones Transgénicos , Mutación Missense , FN-kappa B/genética , FN-kappa B/metabolismo , Mutación Puntual , Proteína 2 Ligando de Muerte Celular Programada 1/antagonistas & inhibidores , ARN Neoplásico/biosíntesis , ARN Neoplásico/genética , Transcriptoma
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