title: Association of CCND1 overexpression with KRAS and PTEN alterations in specific subtypes of non-small cell lung carcinoma and its influence on patients' outcome.
abstract: Cyclin D1 is one of the major cellular oncogenes, overexpressed in number of human cancers, including non-small cell lung carcinoma (NSCLC). However, it does not exert tumorigenic activity by itself, but rather cooperates with other altered oncogenes and tumor suppressors. Therefore, in the present study, we have examined mutual role of cyclin D1, KRAS, and PTEN alterations in the pathogenesis of NSCLC and their potential to serve as multiple molecular markers for this disease. CCND1 gene amplification and gene expression were analyzed in relation to mutational status of KRAS gene as well as to PTEN alterations (loss of heterozygosity and promoter hypermethylation) in NSCLC patient samples. Moreover, the effect of these co-alterations on patient survival was examined. Amplified CCND1 gene was exclusively associated with increased gene expression. Statistical analyses also revealed significant association between CCND1 overexpression and KRAS mutations in the whole group and in the groups of patients with adenocarcinoma, grade 1/2, and stage I/II. In addition, CCND1 overexpression was significantly related to PTEN promoter hypermethylation in the whole group and in the group of patients with squamous cell carcinoma and lymph node invasion. These joint alterations also significantly shortened patients' survival and were shown to be an independent factor for adverse prognosis. Overall results point that cyclin D1 expression cooperates with KRAS and PTEN alterations in pathogenesis of NSCLC, and they could serve as potential multiple molecular markers for specific subgroups of NSCLC patients as well as prognostic markers for this type of cancer.
authors.affiliation: Department of Neurobiology, University of Belgrade, Institute for Biological Research, Bulevar Despota Stefana 142, 11060, Belgrade, Republic of Serbia.
authors.forename: Miodrag
authors.initials: M
authors.lastname: Dragoj
authors.affiliation: Department of Neurobiology, University of Belgrade, Institute for Biological Research, Bulevar Despota Stefana 142, 11060, Belgrade, Republic of Serbia.
authors.forename: Zorica
authors.initials: Z
authors.lastname: Milosevic
authors.affiliation: Department of Neurobiology, University of Belgrade, Institute for Biological Research, Bulevar Despota Stefana 142, 11060, Belgrade, Republic of Serbia.
authors.forename: Jasna
authors.initials: J
authors.lastname: Bankovic
authors.affiliation: Department of Neurobiology, University of Belgrade, Institute for Biological Research, Bulevar Despota Stefana 142, 11060, Belgrade, Republic of Serbia.
authors.forename: Jelena
authors.initials: J
authors.lastname: Dinic
authors.affiliation: Department of Neurobiology, University of Belgrade, Institute for Biological Research, Bulevar Despota Stefana 142, 11060, Belgrade, Republic of Serbia.
authors.forename: Milica
authors.initials: M
authors.lastname: Pesic
authors.affiliation: Department of Neurobiology, University of Belgrade, Institute for Biological Research, Bulevar Despota Stefana 142, 11060, Belgrade, Republic of Serbia.
authors.forename: Nikola
authors.initials: N
authors.lastname: Tanic
authors.affiliation: Department of Neurobiology, University of Belgrade, Institute for Biological Research, Bulevar Despota Stefana 142, 11060, Belgrade, Republic of Serbia. tijana.andjelkovic@ibiss.bg.ac.rs.
authors.forename: Tijana
authors.initials: T
authors.lastname: Stankovic
mesh_terms: D014408:Biomarkers, Tumor / Q000096:biosynthesis / Q000235:genetics*; D002289:Carcinoma, Non-Small-Cell Lung / Q000235:genetics* / Q000473:pathology; D019938:Cyclin D1 / Q000096:biosynthesis / Q000235:genetics*; D019175:DNA Methylation / Q000235:genetics; D018572:Disease-Free Survival; D005784:Gene Amplification; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D053208:Kaplan-Meier Estimate; D019656:Loss of Heterozygosity / Q000235:genetics; D009154:Mutation; D051059:PTEN Phosphohydrolase / Q000096:biosynthesis / Q000235:genetics*; D011379:Prognosis; D016283:Proto-Oncogene Proteins p21(ras) / Q000096:biosynthesis / Q000235:genetics*
chemical_list: D014408:Biomarkers, Tumor; C530104:CCND1 protein, human; C117307:KRAS protein, human; D019938:Cyclin D1; D051059:PTEN Phosphohydrolase; C494929:PTEN protein, human; D016283:Proto-Oncogene Proteins p21(ras)
keywords: CCND1; KRAS; Non-small cell lung carcinoma; PTEN