Linked Life Data

8275488

Source:http://linkedlifedata.com/resource/pubmed/id/8275488

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1994-2-9
pubmed:abstractText
Immunopositivity for the p53 tumor suppressor gene product was evaluated in 133 breast cancers and compared to loss of heterozygosity (LOH) at various chromosomal loci. The validity of p53 immunopositivity as an indicator for p53 mutations was verified using two molecular assays of p53 mutations: single stranded conformational polymorphism (32 cases) and/or direct sequencing (14 cases). Immunopositivity was highly specific for mutations, since all of 15 strongly immunopositive tumors (> 10% of the cells are positive) and seven of nine cases with borderline immunopositivity had mutations by molecular analysis but were somewhat lower in sensitivity, p53 mutations being also detected in three of 23 (13%) immunonegative cases. LOH was measured at loci on the following chromosomes (1p,q; 2p; 3p; 7q; 11p,q; 13q; 16q; 17p; 18p,q; and 22q) by Southern blotting, polymerase chain reaction amplification of restriction fragment length polymorphisms, or repetitive cytidine and adenine stretches (CA repeats). There was no association between p53 mutations and one measure of genomic instability, namely, high incidence of overall LOH. In contrast, p53 mutations strongly associated with LOH at two specific loci, 3p24-26 (P < 0.001) and 7q31 (P < 0.05). There was no association between p53 mutations and LOH at 17p (site of the p53 gene), suggesting that breast cancers often have only one defective allele of the p53 gene.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0008-5472
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
54
pubmed:geneSymbol
p53
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
499-505
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Loss of heterozygosity and p53 gene mutations in breast cancer.
pubmed:affiliation
Geraldine Brush Cancer Research Institute, California Pacific Medical Center, San Francisco 94115-1932.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.