Linked Life Data

12902480

Source:http://linkedlifedata.com/resource/pubmed/id/12902480

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2003-8-6
pubmed:abstractText
Ig-PLP1 is an Ig chimera expressing proteolipid protein-1 (PLP1) peptide corresponding to aa residues 139-151 of PLP. Newborn mice given Ig-PLP1 in saline on the day of birth and challenged 7 wk later with PLP1 peptide in CFA develop an organ-specific neonatal immunity that confers resistance against experimental allergic encephalomyelitis. The T cell responses in these animals comprise Th2 cells in the lymph node and anergic Th1 lymphocytes in the spleen. Intriguingly, the anergic splenic T cells, although nonproliferative and unable to produce IFN-gamma or IL-4, secrete significant amounts of IL-2. In this work, studies were performed to determine whether costimulation through B7 molecules plays any role in the unusual form of splenic Th1 anergy. The results show that engagement of either B7.1 or B7.2 with anti-B7 Abs during induction of EAE in adult mice that were neonatally tolerized with Ig-PLP1 restores and exacerbates disease severity. At the cellular level, the anergic splenic T cells regain the ability to proliferate and produce IFN-gamma when stimulated with Ag in the presence of either anti-B7.1 or anti-B7.2 Ab. However, such restoration was abolished when both B7.1 and B7.2 molecules were engaged simultaneously, indicating that costimulation is necessary for reactivation. Surprisingly, both anti-B7.1 and anti-B7.2 Abs triggered splenic dendritic cells to produce IL-12, a key cytokine required for restoration of the anergic T cells. Thus, recovery from neonatally induced T cell anergy requires B7 molecules to serve double functions, namely, costimulation and induction of cytokine production by APCs.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
171
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1801-8
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed-meshheading:12902480-Animals, pubmed-meshheading:12902480-Animals, Newborn, pubmed-meshheading:12902480-Antibodies, Blocking, pubmed-meshheading:12902480-Antibodies, Monoclonal, pubmed-meshheading:12902480-Antigen-Presenting Cells, pubmed-meshheading:12902480-Antigens, CD, pubmed-meshheading:12902480-Antigens, CD80, pubmed-meshheading:12902480-Antigens, CD86, pubmed-meshheading:12902480-Cell Division, pubmed-meshheading:12902480-Cells, Cultured, pubmed-meshheading:12902480-Clonal Anergy, pubmed-meshheading:12902480-Encephalomyelitis, Autoimmune, Experimental, pubmed-meshheading:12902480-Female, pubmed-meshheading:12902480-Immune Tolerance, pubmed-meshheading:12902480-Injections, Intraperitoneal, pubmed-meshheading:12902480-Interleukin-12, pubmed-meshheading:12902480-Lymphocyte Activation, pubmed-meshheading:12902480-Male, pubmed-meshheading:12902480-Membrane Glycoproteins, pubmed-meshheading:12902480-Mice, pubmed-meshheading:12902480-Mice, Inbred Strains, pubmed-meshheading:12902480-Myelin Proteolipid Protein, pubmed-meshheading:12902480-Spleen, pubmed-meshheading:12902480-T-Lymphocyte Subsets, pubmed-meshheading:12902480-Tumor Cells, Cultured
pubmed:year
2003
pubmed:articleTitle
Break of neonatal Th1 tolerance and exacerbation of experimental allergic encephalomyelitis by interference with B7 costimulation.
pubmed:affiliation
Department of Molecular Microbiology and Immunology, University of Missouri School of Medicine, Columbia, MO 65212, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't