title: Quantitative determination of c-myc facilitates the assessment of prognosis of OSCC patients.
abstract: Myc genes are a family of proto-oncogenes whose proteins are implicated in the regulation of cell proliferation, differentiation and apoptosis, and in regulating the activity of genes involved in cell division. The aim of the present study was to establish a quantitative description of the expression of c-myc and evaluate its relationship with other clinical and prognostic factors, as well as to establish a multivariate survival prediction model. This is a retrospective study of 68 patients diagnosed with oral squamous cell carcinoma (OSCC). We constructed a tissue microarray for investigating the expression of c-myc by immunohistochemistry. Statistical analyses were carried out, and a multivariate model that predicts survival was established. The average expression of c-myc was 50.32 (SD, 26.05) with a range from 6.60 to 99.48; similar for initial and advanced tumor stages. Non-smoking patients had higher levels of c-myc, showing statistically significant differences (Kruskal-Wallis χ2=5.975; p=0.05). We found no statistically significant relationship between the quantitative expression of c-myc and any other clinical or pathological parameters. For each unit of increase of c-myc, the risk increased by 1.15 (p<0.001; HR, 1.150; 95% CI, 1062-1245). Further study of this protein, which may have a significant diagnostic, prognostic and therapeutic value is warranted. Its determination can be valuable when used together with other markers to assess the prognosis of OSCC patients.
authors.affiliation: Oral Medicine, Oral Surgery and Implantology Unit, Faculty of Medicine and Dentistry, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Pérez-Sayáns
authors.affiliation: Department of Pathology and Forensic Sciences, University Hospital and School of Medicine of Santiago de Compostela, Santiago de Compostela, Spain.
authors.forename: J M
authors.initials: JM
authors.lastname: Suárez-Peñaranda
authors.affiliation: Laboratorio Oncología Traslacional, Fundación Idichus, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Padín-Iruegas
authors.affiliation: Clinical Epidemiology and Biostatistics Unit, Hospital Clínico Universitario de Santiago de Compostela, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Gayoso-Diz
authors.affiliation: Oral Medicine, Oral Surgery and Implantology Unit, Faculty of Medicine and Dentistry, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Reis-De Almeida
authors.affiliation: Unidad de Medicina Molecular, Fundación Pública Galega de Medicina Xenómica, Edificio de Consultas Planta-2, Hospital Clinico Universitario, Santiago de Compostela, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Barros-Angueira
authors.affiliation: Oral Medicine, Oral Surgery and Implantology Unit, Faculty of Medicine and Dentistry, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Gándara-Vila
authors.affiliation: Oral Medicine, Oral Surgery and Implantology Unit, Faculty of Medicine and Dentistry, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Blanco-Carrión
authors.affiliation: Oral Medicine, Oral Surgery and Implantology Unit, Faculty of Medicine and Dentistry, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain.
authors.forename: A
authors.initials: A
authors.lastname: García-García
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis*; D002294:Carcinoma, Squamous Cell / Q000378:metabolism / Q000401:mortality / Q000473:pathology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000378:metabolism / Q000401:mortality / Q000473:pathology*; D011379:Prognosis; D016016:Proportional Hazards Models; D016271:Proto-Oncogene Proteins c-myc / Q000032:analysis / Q000096:biosynthesis*; D012189:Retrospective Studies; D046888:Tissue Array Analysis
chemical_list: D014408:Biomarkers, Tumor; C489427:MYC protein, human; D016271:Proto-Oncogene Proteins c-myc