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- Title
T Lymphocyte Inhibition by Tumor-Infiltrating Dendritic Cells Involves Ectonucleotidase CD39 but Not Arginase-1.
- Authors
Trad, Malika; Gautheron, Alexandrine; Fraszczak, Jennifer; Alizadeh, Darya; Larmonier, Claire; LaCasse, Collin J.; Centuori, Sara; Audia, Sylvain; Samson, Maxime; Ciudad, Marion; Bonnefoy, Francis; Lemaire-Ewing, Stéphanie; Katsanis, Emmanuel; Perruche, Sylvain; Saas, Philippe; Bonnotte, Bernard
- Abstract
T lymphocytes activated by dendritic cells (DC) which present tumor antigens play a key role in the antitumor immune response. However, in patients suffering from active cancer, DC are not efficient at initiating and supporting immune responses as they participate to T lymphocyte inhibition. DC in the tumor environment are functionally defective and exhibit a characteristic of immature phenotype, different to that of DC present in nonpathological conditions. The mechanistic bases underlying DC dysfunction in cancer responsible for the modulation of T-cell responses and tumor immune escape are still being investigated. Using two different mouse tumor models, we showed that tumor-infiltrating DC (TIDC) are constitutively immunosuppressive, exhibit a semimature phenotype, and impair responder T lymphocyte proliferation and activation by a mechanism involving CD39 ectoenzyme.
- Subjects
ANIMAL experimentation; ANTIGENS; BIOLOGICAL models; CYTOKINES; ENZYMES; FLOW cytometry; HIGH performance liquid chromatography; IMMUNOGLOBULINS; MICE; T cells; TUMORS; WESTERN immunoblotting; DESCRIPTIVE statistics; MANN Whitney U Test
- Publication
BioMed Research International, 2015, Vol 2015, p1
- ISSN
2314-6133
- Publication type
journal article
- DOI
10.1155/2015/891236