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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1983-11-23
pubmed:abstractText
A simple chemical method is described which creates cyanate groups on the saccharide core of bacterial lipopolysaccharide (LPS). The activated LPS molecule is stable at pH 3.5 and can be kept for months at -20 degrees C without loss of properties. The strong reactivity of the cyanate groups permits efficient covalent coupling of various molecules to LPS. This is done under non-denaturing conditions. This paper also describes the coupling of microquantities of antigen (5-10 micrograms) to LPS. The 'LPS-antigen' conjugates are easily purified upon centrifugation at 15,000 X g. These compounds are mitogenic for B cells and trigger in vivo or in vitro production of antibodies directed against the coupled antigen. In vitro, a concentration of conjugate as low as 10(-2) micrograms/ml triggers specific antibody synthesis. Injection of 5 micrograms of conjugate in mice induces a humoral response detectable 7 days after immunization. B cells cultured for 5 days with an adequate dose of the LPS-beta-galactosidase conjugate were fused with the Sp2-0-Ag cell line to give anti-beta-galactosidase hybridomas.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0022-1759
pubmed:author
pubmed:issnType
Print
pubmed:day
30
pubmed:volume
63
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
123-31
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1983
pubmed:articleTitle
Covalent coupling of antigens to chemically activated lipopolysaccharide: a tool for in vivo and in vitro specific B cell stimulation.
pubmed:publicationType
Journal Article