Contribution de la galectine 9 aux interactions hôte-tumeur

Univ Europeenne - EAN : 9786131544248
JIHENE-K
Édition papier

EAN : 9786131544248

Paru le : 3 nov. 2010

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  • EAN13 : 9786131544248
  • Réf. fournisseur : 4964817
  • Editeur : Univ Europeenne
  • Date Parution : 3 nov. 2010
  • Disponibilite : Disponible
  • Barème de remise : NS
  • Nombre de pages : 136
  • Format : H:229 mm L:152 mm E:8 mm
  • Poids : 210gr
  • Interdit de retour : Retour interdit
  • Résumé : Nasopharyngeal carcinomas (NPC) are human epithelial tumors constantly associated with the Epstein-Barr virus. However it was known that these cells were producing in vitro exosomes carrying the galectin 9 protein. Galectin 9 is an agonist of the Tim-3 receptor, a pro-apoptotic receptor carried by the mature CD4 + Th1 lymphocytes. Our data show that NPC exosomes carrying galectin 9 behave as agonists of the Tim-3 receptor. They are selectively detected in the plasma of xenografted mice or patients with NPC. In vitro they induce massive apoptosis of cells derived from CD4 + Th1 lymphocyte clones expressing Tim-3 and used as a model of cellular targets. This effect is inhibited by pre-incubating either the target cells with an anti-Tim-3 blocking antibody or the exosomes with an anti-galectin 9 antibody. Overall, our work suggests that NPC exosomes carrying galectin 9 play an important role as a factor of immunosuppression in NPC patients. Patient treatment with anti-galectin 9 antibodies might be beneficial in combination with some protocols of adoptive immunotherapy.
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