Linked Life Data

15361829

Source:http://linkedlifedata.com/resource/pubmed/id/15361829

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
46
pubmed:dateCreated
2004-10-7
pubmed:abstractText
Budesonide, a glucocorticoid, was proven to be a highly effective agent in preventing the development of lung tumors in A/J mice. In a lung tumor bioassay, budesonide produced 70% inhibition of tumor multiplicity and 94% reduction of total tumor load compared to benzopyrene (B[a]P) treated mice. Gene expression array analysis was performed on mouse lung tumors from this bioassay using Affymetrix U74Av2 GeneChips to determine gene expression changes associated with budesonide treatment. We found 363 genes that were changed between lung tumors induced by treatment with B[a]P and similar tumors treated with budesonide. Among them, 243 genes were overexpressed and 120 genes were underexpressed after budesonide treatment. In addition, 108 genes differentially expressed during mouse lung tumorigenesis (50 genes overexpressed and 58 genes underexpressed) were modulated back to normal levels after budesonide treatment when compared with the controls group. These genes are involved in a broad range of different pathways including control of cell cycle, signal transduction, and apoptosis and may play a role in the observed preventive effect. Our results suggest that budesonide exerts its effects of chemoprevention through growth arrest via Mad2/3 and through apoptosis via Bim/Blk and, by inference, caspase-8/9. Using the pathway visualization tool GenMapp, G protein pathway and MAPK cascade were also regulated by budesonide. Thus, we have determined, for the first time, the expression profiles of genes modulated by budesonide during murine lung tumorigenesis. Our results indicate that the chemopreventive effects of budesonide in the mouse lung tumorigenesis assay involved increase and decrease expression of a wide variety of genes in multiple signaling pathways.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0950-9232
pubmed:author
pubmed:issnType
Print
pubmed:day
7
pubmed:volume
23
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
7746-52
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Budesonide exerts its chemopreventive efficacy during mouse lung tumorigenesis by modulating gene expressions.
pubmed:affiliation
Department of Surgery and The Alvin J Siteman Cancer Center, Washington University School of Medicine, 660 S Euclid Avenue, St Louis, MO 63110, USA.
pubmed:publicationType
Journal Article