C-type lectin DC-SIGN; an adhesion, signalling and antigen-uptake molecule that guides dendritic cells in immunity
Švajger, Urban ...
The dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin (DC SIGN) is a type II C-type lectin whose expression is restricted to the most potent antigen-presenting cells ...(APCs), the dendritic cells (DCs). In recent years, DC-SIGN has gained an exponential increase in attention because of its involvement in multiple aspects of immune function. Besides being an adhesion molecule, particularly in binding ICAM-2 and ICAM-3,it is also crucial in recognizing several endogenous and exogenous antigens. Additionally, the intracellular domain of DC-SIGN includes molecular motifs, which enable the activation of signal transduction pathways involving Raf-1 and subsequent modulation of DC-maturation status, through direct modification of nuclear factor Nf-?B in DCs. Upon DC-SIGN engagement bymannose- or fucose-containing oligosaccharides, the latter leads to a tailored Toll-like receptor signalling, resulting in an altered DC-cytokine profile and skewing of Th1/Th2 responses. In this article, we will discuss recent advances on a broad perspective concerning DC-SIGN structure, signalling and immune function.
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