Linked Life Data

11960700

Source:http://linkedlifedata.com/resource/pubmed/id/11960700

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2002-4-18
pubmed:abstractText
Recent studies have shown that aberrantly expressed gastrin-releasing peptide (GRP) and its receptor (GRP-R) critically regulate tumor cell differentiation in colon cancers developing in humans and mice. This finding suggested that the ability of GRP/GRP-R to promote a well-differentiated phenotype in colon cancer might reflect a re-capitulation of a normal role in regulating intestinal organogenesis. To determine if this was the case, we compared and contrasted intestinal development in GRPR-/- mice with their wild type littermates. GRP/GRP-R co-expression in wild type mice was only observed in villous enterocytes between N-1 and N-12. During this time frame villous growth was completely attenuated in GRPR-/- mice. The contribution of GRP/GRP-R to villous growth was due to their act in increasing enterocyte proliferation prior to N-8 but increasing enterocyte size thereafter. From N-12 onwards, small intestinal villous growth in GRPR-/- mice resumed such that no difference in this structure could be detected at adulthood between mice of either genotype. We next studied GRP/GRP-R expression in human abortuses. These proteins were co-expressed by villous enterocytes only between weeks 14 and 20 post-conception, a time frame analogous to when they are expressed in the murine intestine. Thus, this study shows for the first time that GRP/GRP-R play a transient and non-critical role in intestinal development, yet provides a rationale for their re-appearance in colon cancer.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0925-4773
pubmed:author
pubmed:issnType
Print
pubmed:volume
113
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
121-30
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Contribution of gastrin-releasing peptide and its receptor to villus development in the murine and human gastrointestinal tract.
pubmed:affiliation
Department of Medicine, University of Illinois at Chicago and Chicago Veterans Administration Medical Center (West Side Division), 840 South Wood Street (M/C 787), Chicago, IL 60612, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.