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Diagnostic Role of Circulating Free Plasma DNA Detection in Patients With Localized Prostate Cancer
Author(s) -
Annalisa Altimari,
Antonia D’Errico Grigioni,
Elisa Benedettini,
Elena Gabusi,
Riccardo Schiavina,
Antonio Martinell,
Antonio Maria MorselliLabate,
Giuseppe Martorana,
Walter Franco Grigioni,
Michelangelo Fiorentino
Publication year - 2008
Publication title -
american journal of clinical pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.859
H-Index - 128
eISSN - 1943-7722
pISSN - 0002-9173
DOI - 10.1309/dbpx1mfnddjbw1fl
Subject(s) - prostate cancer , biomarker , medicine , cancer , gstp1 , receiver operating characteristic , stage (stratigraphy) , pathology , prostate , polymerase chain reaction , dna methylation , oncology , gastroenterology , gene , biology , genotype , gene expression , paleontology , biochemistry
To analyze the potential diagnostic relevance of free plasma DNA (FPDNA), we enrolled 64 patients with localized prostate cancer (CaP). FPDNA was quantified by real-time polymerase chain reaction assessment of the HTERT gene in blood samples from 64 patients with CaP and 45 healthy males. Methylation of the GSTP1 gene was used to confirm the neoplastic origin of FPDNA in selected cases. The mean +/- SD levels of FPDNA were higher in patients with CaP (15.4 +/- 10.9 ng/mL) than in control subjects (5.5 +/- 3.5 ng/mL; P <.001). By using the best cutoff value, the sensitivity of the test was 80%, the specificity was 82%, the area under the receiver operating characteristic curve, 0.881. High FPDNA values were significantly associated with pathologic T3 stage (P = . 035). Methylation of the GSTP1 gene was found in 4 (25%) of 16 FPDNA samples and 15 (94%) of 16 tissue samples. Quantification of FPDNA discriminates between patients with CaP and healthy subjects and correlates with pathologic tumor stage. FPDNA is a candidate biomarker for early diagnosis and monitoring of CaP.

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