Linked Life Data

2040792

Source:http://linkedlifedata.com/resource/pubmed/id/2040792

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
1991-7-10
pubmed:abstractText
Newly generating memory B cells rapidly accumulate somatic mutations that can alter their Ag-combining sites and potentially engender recognition of self determinants. To investigate the possibility that, during their emergence secondary B cells pass through a window of tolerance susceptibility, we have examined the in vitro generation of memory B cells in the presence or absence of tolerogen. The findings indicate that, before antigenic stimulation, precursors to memory B cells are resistant to tolerance induction. However, 2 to 7 days after T cell-dependent antigenic stimulation, newly emerging hapten-specific secondary B cells can be inactivated by the presence of hapten on a carrier not recognized by available Th cells. This inactivation can be blocked by the presence of free hapten and can be competed by the presence of immunogen. Inactivation of newly generating secondary B cells appears less specific than the tolerance induction of immature neonatal or bone marrow B cells because inactivation can be accomplished by cross-reactive determinants. Interestingly, the presence of tolerogen after primary stimulation did not preclude the generation of cells responsive to a third in vitro stimulation. Therefore, whereas newly emerging memory B cells are highly susceptible to inactivation, the progression of the clones of progenitors to memory B cells appears resistant to tolerance induction.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
146
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
4099-104
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Tolerance susceptibility of newly generating memory B cells.
pubmed:affiliation
Department of Immunology, Scripps Clinic and Research Foundation, La Jolla, CA 92037.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.