Linked Life Data

8227191

Source:http://linkedlifedata.com/resource/pubmed/id/8227191

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1993-12-21
pubmed:abstractText
We have previously suggested a role for gp40 in cell-cell adhesion in Dictyostelium purpureum from the fact that antibodies specific for this protein inhibited adhesion in an in vitro assay [Springer: Dev Biol 133:447-455, 1989]. To further confirm the role mutants lacking the protein were isolated and characterized. To our surprise, the mutants had normal adhesive properties both in vitro and in situ. These results lead us to the conclusion that gp40 is not necessary for the cell-cell adhesions observed and may not be a molecule which directly participates in these adhesions. When studied further, we found that adhesion-inhibitory antibodies were only effective as divalent IgG. Monovalent Fab fragments of the same antibodies could not inhibit adhesion. The inhibitory antibodies also caused the cells to remain rounded and incapable of attaching to plastic surfaces. We conclude that when divalent antibodies specific for gp40 cross-link this protein on the cell surface a cytoskeletal change prevents them from attaching to substratum as well as to other cells, thereby inhibiting cell-cell adhesion. We suggest that an alternative mechanism for inhibition of cell-cell adhesion by divalent antibodies exists and should be considered before proposing a direct role for a protein in adhesion.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0730-2312
pubmed:author
pubmed:issnType
Print
pubmed:volume
53
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
85-97
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Antibodies specific for gp40 inhibit cell-cell adhesion by cross-linking the protein on the surface of Dictyostelium purpureum.
pubmed:affiliation
Veterans Affairs Medical Center, San Diego, California 92161.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.