V gamma 9V delta 2 T lymphocytes efficiently recognize and kill zoledronate-sensitized, imatinib-sensitive, and imatinib-resistant chronic myelogenous leukemia cells.
J Immunol
; 184(6): 3260-8, 2010 Mar 15.
Article
en En
| MEDLINE
| ID: mdl-20154204
ABSTRACT
Imatinib mesylate (imatinib), a competitive inhibitor of the BCR-ABL tyrosine kinase, is highly effective against chronic myelogenous leukemia (CML) cells. However, because 20-30% of patients affected by CML display either primary or secondary resistance to imatinib, intentional activation of Vgamma9Vdelta2 T cells by phosphoantigens or by agents that cause their accumulation within cells, such as zoledronate, may represent a promising strategy for the design of a novel and highly innovative immunotherapy capable to overcome imatinib resistance. In this study, we show that Vgamma9Vdelta2 T lymphocytes recognize, trogocytose, and efficiently kill imatinib-sensitive and -resistant CML cell lines pretreated with zoledronate. Vgamma9Vdelta2 T cell cytotoxicity was largely dependent on the granule exocytosis- and partly on TRAIL-mediated pathways, was TCR-mediated, and required isoprenoid biosynthesis by zoledronate-treated CML cells. Importantly, Vgamma9Vdelta2 T cells from patients with CML can be induced by zoledronate to develop antitumor activity against autologous and allogeneic zoledronate-treated leukemia cells, both in vitro and when transferred into immunodeficient mice in vivo. We conclude that intentional activation of Vgamma9Vdelta2 T cells by zoledronate may substantially increase their antileukemia activities and represent a novel strategy for CML immunotherapy.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Piperazinas
/
Pirimidinas
/
Linfocitos T Citotóxicos
/
Leucemia Mielógena Crónica BCR-ABL Positiva
/
Receptores de Antígenos de Linfocitos T gamma-delta
/
Resistencia a Múltiples Medicamentos
/
Resistencia a Antineoplásicos
/
Difosfonatos
/
Imidazoles
Tipo de estudio:
Diagnostic_studies
Límite:
Adult
/
Animals
/
Humans
Idioma:
En
Año:
2010
Tipo del documento:
Article