Linked Life Data

15965301

Source:http://linkedlifedata.com/resource/pubmed/id/15965301

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2005-6-20
pubmed:abstractText
CC chemokine receptor 7 (CCR7) is selectively expressed on mature dendritic cells (DC). The CCR7 ligands, CC chemokine ligand (CCL) 19 and CCL21, facilitate migration of mature DC from the peripheral tissues to regional lymph nodes. We previously demonstrated that CCR7 ligands induced rapid receptor-mediated endocytosis of dextran in mature DC. In the present study, we further examined the effects of CCR7 ligands on endocytosis of other kinds of antigen, mannosilated bovine serum albumin (Mann-BSA), Escherichia coli(E. coli), or ovalbumin-containing immune complex (OVA-IC), by mature DC. We found that CCR7 ligands enhanced the endocytosis of Mann BSA, E. coli, and OVA-IC in mature DC but not in immature DC. The endocytosis of BSA was not enhanced by CCR7 ligands. Furthermore, the phagocytosis of OVA-IC was significantly inhibited by anti-Fcgamma receptor III/II antibody. These results demonstrate that CCR7 ligands enhance only receptor-mediated endocytosis by mature DC. When rapidly phagocytosed E. coli were traced in CCL19-treated mature DC, most of the phagocytosed E. coli did not colocalize with the lysosomal marker: lysosome-associated membrane protein-1 (Lamp-1), whereas most of E. coli taken up relatively slowly by immature DC colocalized with Lamp-1. These results suggest that phagocytosis of antigens by immature and mature DC plays different functional roles.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0385-5600
pubmed:author
pubmed:issnType
Print
pubmed:volume
49
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
535-44
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
CCR7 ligand-enhanced phagocytosis of various antigens in mature dendritic cells-time course and antigen distribution different from phagocytosis in immature dendritic cells.
pubmed:affiliation
Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't