Linked Life Data

8980246

Source:http://linkedlifedata.com/resource/pubmed/id/8980246

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1997-1-30
pubmed:abstractText
Several genetic alterations have been described in benign and malignant primary tumors of the colorectum, but few such associations have been made with the progression of these tumors. This study compares genetic changes found in distant metastases (n = 22) with local recurrences (n = 15) as well as with primary carcinomas (n = 12). Complete allelotypes of the tumors were obtained by analyzing 43 microsatellite loci, representing all non-acrocentric chromosome arms and mapping to the mid-portion of the arms. Allelic imbalances in the tumor DNA were evaluated by comparison with the patient's constitutional pattern in blood DNA. The allelotype profile of the distant metastases was different from those found in the local recurrences and in the primary carcinomas. More than 20% of the distant metastases exhibited allelic imbalances at loci representing 20 chromosome arms. The majority of these regions were less frequently changed in the local recurrences and in the primary tumors. The markers that most often were altered in the metastasis (>40%) represented chromosome arms 14q, 17p, 18p and 18q. Only two regions, 10p and 19p, were unaltered in all tumors analyzed. We found that the median value of fractional allelic imbalance was twice as high in the distant metastases as in the recurrent tumors. Novel alleles at microsatellite loci were observed in all 3 tumor types, but in the advanced tumors this phenotype was characterized by only a single novel allele seen at less than 10% of the analyzed loci.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0020-7136
pubmed:author
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
69
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
452-6
pubmed:dateRevised
2007-7-24
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Allelotype profiles of local recurrences and distant metastases from colorectal-cancer patients.
pubmed:affiliation
Department of Genetics, Institute for Cancer Research, The Norwegian Radium Hospital, Montebello, Oslo, Norway.
pubmed:publicationType
Journal Article