Martino A, Casetti R, D'Alessandri A, Sacchi A, Poccia F. Complementary function of gamma delta T-lymphocytes and dendritic cells in the response to isopentenyl-pyrophosphate and lipopolysaccharide antigens.
J Clin Immunol 2005;
25:230-7. [PMID:
15981088 DOI:
10.1007/s10875-005-4080-8]
[Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2004] [Accepted: 02/14/2005] [Indexed: 10/25/2022]
Abstract
Dendritic cells and gamma delta T-lymphocytes play a crucial role in the early response to microbial infections. Since both dendritic cells and gamma delta T-lymphocytes may be activated by specific microbial products, we analyzed their interplay in the presence of such respective ligands: lipopolysaccharide and isopentenyl-pyrophosphate. Activated gamma delta T-cells increased the maturational state of dendritic cells induced by lipopolysaccharide, increasing the expression of co-stimulatory and MHC class I and II molecules. IL-12 production by dendritic cells was strongly amplified in the presence of activated gamma delta T-cells and the Th1 polarization of naïve CD4(+) T-lymphocytes was significantly increased. On the other hand, dendritic cells enhanced gamma delta T-cell functions induced by isopentenyl-pyrophosphate and promote their IL-2 independent proliferation through CD86 contact. Altogether, dendritic cells and gamma delta T-cells exert a complementary function promoting an optimal immune response to non peptidic microbial antigens.
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