Linked Life Data

1401907

Source:http://linkedlifedata.com/resource/pubmed/id/1401907

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
1992-11-13
pubmed:abstractText
Trophoblasts do not express MHC class II Ag on their cell surface, but it is not known at which level the regulation of expression of these IFN-gamma-responsive genes occurs. We localized the IFN-gamma R Ag to the trophoblasts of normal human first trimester placenta. As previously shown, treatment with IFN-gamma of short term cultures of placental explants did not induce expression of HLA-DR Ag in trophoblasts. We demonstrated that in situ hybridization with probes for DRA, DRB, and MHC class II-associated invariant chain genes gave no detectable signals for the presence of the corresponding mRNA in cytotrophoblasts or syncytiotrophoblasts of first trimester placenta with or without IFN-gamma. Maternal leukocytes in these placental preparations as well as IFN-gamma-treated HeLa cell control cultures expressed these mRNA. In addition, Northern analysis of RNA isolated from the trophoblast cell line Jar after treatment with IFN-gamma showed that induction of transcription did not occur from the HLA-DRA, HLA-DRB, or invariant chain genes. Jar cells expressed the IFN-gamma R Ag. These data suggest that down-regulation of MHC class II Ag on trophoblasts in the first trimester placenta and in a cell line include a lack of productive intracellular signaling by the IFN-gamma R and maintenance, in a coordinate manner, of low steady state levels of the mRNA encoded by the DRA, DRB, and invariant chain genes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
149
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2675-80
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Localization of IFN-gamma receptor in first trimester placenta to trophoblasts but lack of stimulation of HLA-DRA, -DRB, or invariant chain mRNA expression by IFN-gamma.
pubmed:affiliation
Department of Surgery, Yale University School of Medicine, New Haven, CT 06510.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't