Abstract:
UNLABELLED:Biomarkers can help to identify patients with early-stages or locally advanced non-small cell lung cancer (NSCLC) who have high risk of relapse and poor prognosis. To correlate the expression of seven biomarkers involved in DNA synthesis and repair and in cell division with clinical outcome, we consecutively collected 82 tumour tissues from radically resected NSCLC patients. The following biomarkers were investigated using IHC and q RT-PCR:excision repair cross-complementation group 1 (ERCC1), breast cancer 1 (BRCA1), ribonucleotide reductase subunits M1 and M2 (RRM1 and RRM2), subunit p53R2, thymidylate synthase (TS), and class III beta-tubulin (TUBB3). Gene expression levels were also validated in an available NSCLC microarray dataset. Multivariate analysis identified the protein overexpression of RRM2 and TS as independent prognostic factors of shorter overall survival (OS). Kaplan-Meier analysis showed a trend in shorter OS for patients with RRM2, TS, and ERCC1, BRCA1 overexpressed tumours. For all of the biomarkers except TUBB3, the OS trends relative to the gene expression levels were in agreement with those relative to the protein expression levels. The NSCLC microarray dataset showed RRM2 and TS as biomarkers significantly associated with OS. This study suggests that high expression levels of RRM2 and TS might be negative prognostic factors for resected NSCLC patients.
journal_name
Dis Markersjournal_title
Disease markersauthors
Grossi F,Dal Bello MG,Salvi S,Puzone R,Pfeffer U,Fontana V,Alama A,Rijavec E,Barletta G,Genova C,Sini C,Ratto GB,Taviani M,Truini M,Merlo DFdoi
10.1155/2015/302649subject
Has Abstractpub_date
2015-01-01 00:00:00pages
302649eissn
0278-0240issn
1875-8630journal_volume
2015pub_type
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