title: Potential involvement of MYC- and p53-related pathways in tumorigenesis in human oral squamous cell carcinoma revealed by proteomic analysis.
abstract: Oral squamous cellular carcinoma is a malignant tumor with poor prognosis. Discovery of early markers to discriminate between malignant and normal cells is of high importance in clinical diagnosis. Subcellular fractions from 10 oral squamous cell carcinoma and corresponding control samples, enriched in mitochondrial and cytosolic proteins, as well as blood from the tumor were analyzed by proteomics, two-dimensional gel electrophoresis, followed by matrix-assisted laser desorption ionization time-of-flight mass spectrometry. Three-hundred and fifty different gene products were identified. Twenty proteins showed deranged levels in oral squamous cell carcinoma in comparison with the control samples and are potentially involved in tumor growth and metastasis. Of these, 16 proteins were upregulated. By applying pathway analysis, we found 8 of the upregulated gene products to be linked to three main locus genes, p53, MYC, and MYCN, and could be candidate biomarkers for OSCC. The findings of this pilot study show that OSCC gene ontology combined with proteomic analysis is a powerful tool in systems biology for the elucidation of the complexity of expression profiles in cellular processes. Application of such pathway analysis has the potential to generate new insights into complex molecular mechanisms underlying disease related processes and could therefore significantly contribute to the efficient performance of the entire discovery process.
authors.affiliation: Department of Cranio-Maxillofacial and Oral Surgery, Medical University of Vienna, Vienna, Austria.
authors.forename: Jadranka
authors.initials: J
authors.lastname: Koehn
authors.forename: Kurt
authors.initials: K
authors.lastname: Krapfenbauer
authors.forename: Susanna
authors.initials: S
authors.lastname: Huber
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Stein
authors.forename: Walter
authors.initials: W
authors.lastname: Sutter
authors.forename: Franz
authors.initials: F
authors.lastname: Watzinger
authors.forename: Boban M
authors.initials: BM
authors.lastname: Erovic
authors.forename: Dietmar
authors.initials: D
authors.lastname: Thurnher
authors.forename: Thomas
authors.initials: T
authors.lastname: Schindler
authors.forename: Michael
authors.initials: M
authors.lastname: Fountoulakis
authors.forename: Dritan
authors.initials: D
authors.lastname: Turhani
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000378:metabolism* / Q000473:pathology; D045744:Cell Line, Tumor; D015180:Electrophoresis, Gel, Two-Dimensional; D006801:Humans; D007150:Immunohistochemistry; D009062:Mouth Neoplasms / Q000378:metabolism* / Q000473:pathology; D016271:Proto-Oncogene Proteins c-myc / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism*
chemical_list: D016271:Proto-Oncogene Proteins c-myc; D016159:Tumor Suppressor Protein p53