Linked Life Data

9014214

Source:http://linkedlifedata.com/resource/pubmed/id/9014214

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1997-4-15
pubmed:abstractText
Eicosanoids have been implicated in the pathogenesis of cancer and are known to regulate the expression of antigens of the major histocompatibility complex (MHC). In human colon cancer, we have recently observed that: (a) the expression of MHC class I and II antigens are markedly reduced; and (b) the levels of PGE2, but not of PGF2 alpha and LTB4, are elevated compared to histologically normal mucosa. Therefore, we investigated the effect of PGE2, PGF2 alpha and LTB4 on the regulation of MHC class I antigens in two human colon adenocarcinoma cell lines and in a murine model of colon cancer. None of these eicosanoids had any significant effect on the expression of MHC class I antigens in the human colonocytes or the transcription rate of class I genes, with the exception of LTB4 which only modestly suppressed the transcription rate. Similarly, 16, 16-dimethyl-PGE2 had no effect on the expression of MHC class I genes in the colonocytes of BALB/c mice treated with the carcinogen dimethylhydrazine. We conclude that PGE2, PGF2 alpha and LTB4 did not affect the expression of MHC class I antigens in cultured human colon adenocarcinoma cells, and 16, 16-dimethyl PGE2 did not affect their expression in mice, even when mice were treated with a colon carcinogen. Thus, these eicosanoids are an unlikely regulator of the observed underexpression of MHC class I antigens in human colon cancer.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0952-3278
pubmed:author
pubmed:issnType
Print
pubmed:volume
55
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
373-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
The effect of eicosanoids on the expression of MHC genes in cultured human colon cancer cells and mouse colonocytes in vivo.
pubmed:affiliation
Department of Medicine, Cornell University Medical College, New York, NY 10021, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't