Linked Life Data

10223192

Source:http://linkedlifedata.com/resource/pubmed/id/10223192

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1999-5-20
pubmed:abstractText
Non-steroidal anti-inflammatory drugs (NSAIDs) can cause regression of early intestinal tumors and although this is believed to involve cyclooxygenase-2 and apoptosis, the molecular mechanisms remain unclear. Cytoplasmic and nuclear beta-catenin are overexpressed in many of these lesions and Bcl-2, which inhibits apoptosis, may also be elevated during the course of intestinal tumorigenesis. We recently showed that sulindac causes regression of 70-80% of small intestinal tumors in Min/+ mice within 4 days, but does not have the same impact on colonic lesions; after 20 days of treatment the tumor load stabilizes at 10-20% of that in untreated animals. The aim of this study was to determine if NSAID-induced regression of intestinal adenomas might be associated with changes in beta-catenin or Bcl-2 expression. Intestinal tumors from Min/+ mice were harvested after treatment with sulindac for 2, 4 or 20 days and evaluated for expression of beta-catenin and Bcl-2 using immunohistochemistry. There was a > or = 50% decrease in beta-catenin (P = 0.001) and diminishing Bcl-2 (P = 0.019) in small intestinal tumors harvested between 2 and 4 days of treatment when compared with untreated controls. In contrast, small intestinal tumors from animals treated for 20 days were not significantly different from untreated controls. Colonic tumors expressed higher levels of Bcl-2 than those from the small intestine and did not show any significant changes in either Bcl-2 or beta-catenin expression after treatment. Results suggest that modulation of aberrant beta-catenin expression occurs during NSAID-induced regression of intestinal adenomas and that Bcl-2 may confer resistance to these effects.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0143-3334
pubmed:author
pubmed:issnType
Print
pubmed:volume
20
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
635-40
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:10223192-Adenoma, pubmed-meshheading:10223192-Animals, pubmed-meshheading:10223192-Anti-Inflammatory Agents, Non-Steroidal, pubmed-meshheading:10223192-Apoptosis, pubmed-meshheading:10223192-Colonic Neoplasms, pubmed-meshheading:10223192-Cyclooxygenase 2, pubmed-meshheading:10223192-Cytoskeletal Proteins, pubmed-meshheading:10223192-Enzyme Induction, pubmed-meshheading:10223192-Gene Expression Regulation, Neoplastic, pubmed-meshheading:10223192-Genes, APC, pubmed-meshheading:10223192-Genetic Predisposition to Disease, pubmed-meshheading:10223192-Heterozygote, pubmed-meshheading:10223192-Immunoenzyme Techniques, pubmed-meshheading:10223192-Intestinal Neoplasms, pubmed-meshheading:10223192-Intestine, Small, pubmed-meshheading:10223192-Isoenzymes, pubmed-meshheading:10223192-Lymphocytes, pubmed-meshheading:10223192-Mice, pubmed-meshheading:10223192-Mice, Mutant Strains, pubmed-meshheading:10223192-Neoplasm Proteins, pubmed-meshheading:10223192-Organ Specificity, pubmed-meshheading:10223192-Prostaglandin-Endoperoxide Synthases, pubmed-meshheading:10223192-Proto-Oncogene Proteins c-bcl-2, pubmed-meshheading:10223192-Sulindac, pubmed-meshheading:10223192-Trans-Activators, pubmed-meshheading:10223192-beta Catenin
pubmed:year
1999
pubmed:articleTitle
Relationship of beta-catenin and Bcl-2 expression to sulindac-induced regression of intestinal tumors in Min mice.
pubmed:affiliation
Department of Pathology and Nutrition, University of Tennessee, Knoxville 37901, USA. mmcentee@utk.edu
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't