Linked Life Data

2687299

Source:http://linkedlifedata.com/resource/pubmed/id/2687299

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1990-1-24
pubmed:abstractText
Microscopic techniques have been employed to study the cell surface distributions of the immunoglobulin Fc receptors (FcR) II and III on living human neutrophils. Fluorescein-or rhodamine-conjugated monoclonal IgG or Fab fragments directed against FcRII (CDw32) and FcRIII (CD16) were employed to label receptors. FcRII and III were found to be uniformly distributed at neutrophil surfaces during resting conditions. During neutrophil polarization and migration FcRII but not FcRIII preferentially accumulated at the uropod. Sheep erythrocytes (SRBCs) were opsonized with IgG and then incubated with neutrophils. When neutrophils were labeled prior to target addition, FcRII but not FcRIII were found to cluster at the target-effector interface. Little or no clustering of FcRs was observed if labeling was performed after target binding. SRBC oxidation was observed using Soret band illumination during transmitted light microscopy. Time-lapse studies of FcRII distribution and target oxidation were performed. FcRII formed clusters at target effector interfaces prior to target oxidation. Three lines of evidence suggest that clustering is not a general plasma membrane response. Firstly, FcRIII do not cluster lannic acid-modified erythrocytes avidly bound to neutrophils but did not trigger clustering of FcRII. Furthermore, irrelevant neutrophil membrane labels were unaffected by the presence of IgG-opsonized erythrocytes. We suggest that FcRII clustering is one important component leading to the oxidative destruction of target cells.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0021-9541
pubmed:author
pubmed:issnType
Print
pubmed:volume
141
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
598-605
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Cell surface distribution of Fc receptors II and III on living human neutrophils before and during antibody dependent cellular cytotoxicity.
pubmed:affiliation
Department of Biological Sciences, Wayne State University, Detroit, Michigan 48202.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't