Linked Life Data

3257985

Source:http://linkedlifedata.com/resource/pubmed/id/3257985

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1988-4-20
pubmed:abstractText
As B cells mature during ontogeny the CD22 human differentiation Ag is exported from the cytoplasm onto the membrane. Surface expression is lost in terminal differentiation and after activation. In tonsils, CD22 is expressed on the surface of 60 to 80% of the dense B cells. Some IgM+ dense cells, however, and buoyant in vivo activated B cells are CD22-. This differential expression of CD22 and the finding that an anti-CD22 mAb augmented anti-Ig induced B cell proliferation suggested that CD22 may play a role in B cell activation. In this study we have found that CD22+ but not CD22- B cells could be triggered by anti-IgM or anti-IgD to have increased free intracellular calcium ([Ca2+]i). The presence of CD22 rather than of IgD seems to determine the ability of B cells to respond to anti-Ig with a [Ca2+]i flux. Also the proliferative response to anti-Ig or anti-Ig + B cell growth factor was restricted to the CD22+ population. Anti-CD22 mAb, although not inducing [Ca2+]i on their own after binding to B cells, did augment [Ca2+]i fluxes by anti-Ig when cross-linked. Together these results suggest that CD22 may regulate triggering of B cells through surface Ig perhaps by acting as a "bridge" to transmit an early signal into the cytoplasm.
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
140
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1791-5
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
Role of the CD22 human B cell antigen in B cell triggering by anti-immunoglobulin.
pubmed:affiliation
Regional Primate Research Center, University of Washington, Seattle 98195.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't