Linked Life Data

19755651

Source:http://linkedlifedata.com/resource/pubmed/id/19755651

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
2009-10-9
pubmed:abstractText
The goal of this retrospective, multicenter study was to evaluate the ability of a newly developed refinement of a quantitative methylation-specific PCR assay to detect prostate cancer in histopathologically negative biopsy samples collected from men who were later positively diagnosed during a follow-up biopsy procedure. Biomarkers tested in the assay included the much-studied glutathione-S-transferase P1 gene and others reported to be frequently methylated in prostate cancer. Core biopsy tissue from subjects with serial negative biopsies served as a negative control to assess assay specificity. As a positive control, biopsy core tissue from patients histopathologically diagnosed with prostate cancer was used to gauge true marker sensitivity in known cancer-containing specimens. Testing was completed in 971 archived paraffin-embedded tissue blocks from 264 men screened for prostate cancer. More samples were initially tested, but due to the advanced age of the paraffinized tissue, DNA quality for quantitative methylation-specific PCR analysis was insufficient in 34% of the available blocks. The glutathione-S-transferase P1 gene has been confirmed as a powerful indicator of the presence of prostate cancer cells. A sensitivity of 52% was observed in the "potentially false-negative first biopsies," with a corresponding specificity of 85% and the sensitivity in biopsy tissue cores containing histopathologically confirmed prostate cancer was 95%. An even higher sensitivity can be reached with RAR-2beta (84%) and APC (72%), with respective specificities of 48% and 50%. Gene methylation was detected in initial, negative biopsy tissue in men who were later diagnosed with prostate cancer. Testing for methylation in histopathologically negative biopsies could improve the early detection of prostate cancer.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1538-7755
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
18
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2717-22
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Prostate cancer detected by methylated gene markers in histopathologically cancer-negative tissues from men with subsequent positive biopsies.
pubmed:affiliation
University of Texas Health Science Center, San Antonio, Texas, USA. troyerda@evms.edu
pubmed:publicationType
Journal Article, Multicenter Study, Research Support, N.I.H., Extramural