Linked Life Data

1541826

Source:http://linkedlifedata.com/resource/pubmed/id/1541826

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1992-4-9
pubmed:abstractText
We have compared the opsonic and complement-triggering activity of transfectoma-derived, class-switched human IgG1 and IgM mAb (HumAb) against types Ia, II and III group B streptococci (GBS). These antibodies appear to be directed against the common group B cell wall Ag of these organisms. The HumAb IgM promotes uptake of type Ia and II GBS at concentrations as low as 37 ng/ml and type III GBS at concentrations of 150 ng/ml in the presence of human neonatal complement. In contrast, the IgG1 GBS HumAB showed no detectable opsonic activity in concentrations up to 600 ng/ml. When the concentration of HumAb IgG1 is raised to 2.5 micrograms/ml, significant opsonic activity against GBS is detected and when the concentration is approximately 40 micrograms/ml, the opsonic activity peaked at a slightly higher level than that with the HumAb IgM. Thus, approximately 100- fold higher concentrations of the IgG1 than the IgM HumAb are required for optimal opsonization. The opsonic activity of the IgM and IgG1 HumAb are closely related to their ability to consume complement and deposit C3 on the surface of type Ia, II, and III GBS (r = 0.959). We believe that the marked opsonic and protective activity of the IgM GBS HumAb is due to its enhanced avidity and ability to trigger the complement system. Further studies are indicated to determine the feasibility of employing human IgM antibody preparations in the immunotherapy of neonatal GBS disease.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
148
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1879-84
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Comparison of the opsonic and complement triggering activity of human monoclonal IgG1 and IgM antibody against group B streptococci.
pubmed:affiliation
Department of Pathology, University of Utah School of Medicine, Salt Lake City 84132.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't