Linked Life Data

9669665

Source:http://linkedlifedata.com/resource/pubmed/id/9669665

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1999-3-4
pubmed:abstractText
APC mutations introduce premature stop codons into the open reading frame of the gene, leading to the formation of truncated tumor suppressor proteins. Both RNA and protein levels are likely to be profoundly altered by such nonsense mutations. To test this hypothesis, Western blotting and RT-PCR strategies were used to characterize mutant and normal APC protein and APC RNA concentrations in lymphoblastoid cell lines from 22 unrelated polyposis patients carrying different APC mutations. Variable levels of truncated APC peptides were observed in 14 of 14 cell lines with APC mutations within exon 15. No truncated APC protein was detected in six of eight cell lines with APC mutations located 5' of exon 15. Mutations located in exon 15 showed mutant RNA underrepresentation in four of eight cell lines, whereas mutations located 5' of exon 15 showed RNA reduction in five of six cell lines. These findings indicate that a two- to threefold decrease in RNA concentration is common when APC alleles carry chain-terminating mutations. They also suggest that the severe decrease of truncated APC protein observed in some cell lines is due to mechanisms acting at the protein level.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
1045-2257
pubmed:author
pubmed:issnType
Print
pubmed:volume
22
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
278-86
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Chain-terminating mutations in the APC gene lead to alterations in APC RNA and protein concentration.
pubmed:affiliation
Laboratorio di Oncologia Sperimentale, Istituto Nazionale per la Ricerca sul Cancro, Genoa, Italy.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't