Linked Life Data

15177880

Source:http://linkedlifedata.com/resource/pubmed/id/15177880

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2004-6-4
pubmed:abstractText
Trefoil factors family 2 (TFF2), also known as spasmolytic polypeptide, is primarily expressed in the mucus neck cells of gastrointestinal tracts. It has been proposed that TFF2 plays an important physiological role in protection, repair, and healing of gastrointestinal mucosa. To investigate the cis-acting regulatory element that control TFF2 tissue-specific expression, we studied the basal TFF2 promoter activity through transient transfection in several human cancer cell lines. Expression of TFF2 was found to be significantly greater in human breast cancer MCF-7 cells compared to other cancer cells. Results from TFF2 promoter luciferase reporter constructs revealed that the basal level of TFF2 promoter activity was overall more than two-fold higher in MCF-7 cells compared to that of other cell lines examined. Using EMSA assays and site-directed mutagenesis, we identified a cell line-specific transcriptional regulation element located in the TFF2 promoter 5'-flank sequence at -32/-27, and which contains a CCAAT/enhance binding proteins (C/EBPs) consensus-binding site. Mutation of this consensus site reduced the basal promoter activity by more than 50% in MCF-7 cells but had no effect in human gastric cancer cells. In conclusion, we have identified a CCAAT sequence as a cell line-specific cis-acting regulatory element that may contribute to the high level expression of TFF2 in MCF-7 cells. These results also suggest the possibility that TFF2 could play a role in mammary gland tumorigenesis.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0196-9781
pubmed:author
pubmed:issnType
Print
pubmed:volume
25
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
839-47
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Characterization of a CCAAT-enhancer element of trefoil factor family 2 (TFF2) promoter in MCF-7 cells.
pubmed:affiliation
Gastroenterology Division, University of Massachusetts Medical Centre, Worcester 01655, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.