alexa CD1-mediated gamma delta T cell maturation of dendritic cells.
Dermatology

Dermatology

Journal of Clinical & Experimental Dermatology Research

Author(s): Leslie DS, Vincent MS, Spada FM, Das H, Sugita M,

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Abstract Immature myeloid dendritic cells (DCs) express only low levels of major histocompatibility complex (MHC) class II but express high levels of CD1 a, b, and c antigen-presenting molecules at the cell surface. As Vdelta1+ gamma/delta T cells are the main tissue subset of gamma/delta T cells and they are known to recognize CD1c in the absence of specific foreign antigen recognition, we examined the possible interaction of these T cells with immature DCs. We show that CD1-restricted gamma/delta T cells can mediate the maturation of DCs. DC maturation required cell-cell contact and could be blocked by antibodies against CD1c. The maturation process was partially mediated by tumor necrosis factor alpha. Importantly, immature DCs matured in the presence of lipopolysaccharide and CD1-restricted gamma/delta T cells produced bioactive interleukin-12p70. In addition, these DCs were able to efficiently present peptide antigens to naive CD4+ T cells. CD1-restricted gamma/delta T cell recognition of immature DCs provides the human immune system with the capacity to rapidly generate a pool of mature DCs early during microbial invasion. This may be an important source of critical host signals for T helper type 1 polarization of antigen-specific naive T cells and the subsequent adaptive immune response.
This article was published in J Exp Med and referenced in Journal of Clinical & Experimental Dermatology Research

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