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Science 30 April 1999: Vol. 284. no. 5415, pp. 819 - 822 DOI: 10.1126/science.284.5415.819
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Reports
Chemokine Up-Regulation and Activated T Cell Attraction by Maturing Dendritic Cells
H. Lucy Tang,
Jason G. Cyster
*
Langerhans' cells migrating from contact-sensitized skin were
found to up-regulate expression of macrophage-derived chemokine (MDC)
during maturation into lymph node dendritic cells (DCs). Naïve
T cells did not migrate toward MDC, but antigen-specific T cells
rapidly acquired MDC responsiveness in vivo after a subcutaneous injection of antigen. In chemotaxis assays, maturing DCs attracted activated T cells more strongly than naïve T cells. These
studies identified chemokine up-regulation as part of the Langerhans' cell maturation program to immunogenic T cell-zone DC. Preferential recruitment of activated T cells may be a mechanism used by maturing DCs to promote encounters with antigen-specific T cells.
Department of Microbiology and Immunology, University of
California at San Francisco, San Francisco, CA 94143, USA.
*
To whom correspondence should be addressed. E-mail:
cyster{at}itsa.ucsf.edu
Read the Full Text
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