title: Clinical significance of EGFR, Her-2 and EGF in oral squamous cell carcinoma: a case control study.
abstract: BACKGROUND
  The erbB receptors and their ligands are involved in the pathogenesis and progression of oral squamous cell carcinoma (OSCC). Although EGFR and Her-2 are frequently overexpressed in OSCC, few studies evaluated these proteins in saliva and their association with the tumor, which may represent potential usefulness in a clinical setting.
  
  
  METHODS
  The levels of EGFR, Her-2, and EGF were evaluated in saliva of 46 patients with OSCC before and after the surgical removal of the lesion, as well as in matched healthy controls. The relationship of salivary levels and EGFR and Her-2 immunoexpression in tumor samples with clinicopathological features was analyzed.
  
  
  RESULTS
  EGFR and Her-2 salivary levels did not show difference between to pre-surgery and control groups, however, both demonstrated an increase after surgical removal of the tumor. No association was detectable among receptor salivary levels, tissue expression and clinicopathological features. EGF levels in pre-surgery group were significantly lower when compared to the control group.
  
  
  CONCLUSIONS
  EGFR and Her-2 were not considered to be valuable salivary tumor markers in OSCC, however, lower levels of EGF in saliva may suggest a higher susceptibility for OSCC development.
authors.affiliation: Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
authors.forename: Vanessa F
authors.initials: VF
authors.lastname: Bernardes
authors.forename: Frederico O
authors.initials: FO
authors.lastname: Gleber-Netto
authors.forename: Sílvia F
authors.initials: SF
authors.lastname: Sousa
authors.forename: Tarcília A
authors.initials: TA
authors.lastname: Silva
authors.forename: Maria Cássia F
authors.initials: MC
authors.lastname: Aguiar
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000378:metabolism*; D016022:Case-Control Studies; D004815:Epidermal Growth Factor / Q000096:biosynthesis*; D066246:ErbB Receptors / Q000096:biosynthesis*; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000378:metabolism*; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000096:biosynthesis*; D012463:Saliva / Q000378:metabolism
chemical_list: D004815:Epidermal Growth Factor; D066246:ErbB Receptors; D018719:Erb-b2 Receptor Tyrosine Kinases