title: Evaluation of FAK and Src expression in human benign and malignant thyroid lesions.
abstract: Focal Adhesion Kinase (FAK) and Src have been reported to regulate tumor growth, invasion, metastasis and angiogenesis. The present study aimed to evaluate by immunohistochemistry the clinical significance of FAK and Src expression in 108 patients with benign and malignant thyroid lesions. Total FAK expression provided a distinct discrimination between malignant and benign (p = 0.00001), as well as between papillary carcinoma and hyperplastic nodules thyroid lesions (p = 0.00005), being also associated with follicular cells' proliferative capacity (p = 0.0003). In malignant thyroid lesions, total FAK expression was associated with tumor size (p = 0.0455), and presence of capsular (p = 0.0102) and lymphatic (p = 0.0173) invasion. Total Src expression was borderline increased in cases of papillary carcinoma compared to hyperplastic nodules (p = 0.0993), being also correlated with tumor size (p = 0.0169). FAK and Src expression was ascribed to a significant extent to the phosphorylated forms of the enzymes, which provided a better discrimination between malignant and benign thyroid lesions. The current data revealed that FAK and to a lesser extent Src expression could be considered of clinical utility in thyroid neoplasia with potential use as therapeutic targets.
authors.affiliation: Department of Forensic Medicine and Toxicology, Medical School, University of Athens, 75 M Asias str, Goudi, GR11527 Athens, Greece.
authors.forename: Christina
authors.initials: C
authors.lastname: Michailidi
authors.forename: Costas
authors.initials: C
authors.lastname: Giaginis
authors.forename: Vassilios
authors.initials: V
authors.lastname: Stolakis
authors.forename: Paraskevi
authors.initials: P
authors.lastname: Alexandrou
authors.forename: Jerzy
authors.initials: J
authors.lastname: Klijanienko
authors.forename: Ioanna
authors.initials: I
authors.lastname: Delladetsima
authors.forename: Nicolaos
authors.initials: N
authors.lastname: Chatzizacharias
authors.forename: Gerasimos
authors.initials: G
authors.lastname: Tsourouflis
authors.forename: Stamatios
authors.initials: S
authors.lastname: Theocharis
mesh_terms: D000328:Adult; D000368:Aged; D002291:Carcinoma, Papillary / Q000201:enzymology; D003937:Diagnosis, Differential; D005260:Female; D051417:Focal Adhesion Kinase 1 / Q000096:biosynthesis*; D006801:Humans; D006965:Hyperplasia / Q000201:enzymology; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D016392:Proto-Oncogene Proteins pp60(c-src) / Q000096:biosynthesis*; D018709:Statistics, Nonparametric; D013959:Thyroid Diseases / Q000201:enzymology; D013964:Thyroid Neoplasms / Q000201:enzymology*; D055815:Young Adult
chemical_list: D051417:Focal Adhesion Kinase 1; C496050:PTK2 protein, human; D016392:Proto-Oncogene Proteins pp60(c-src)
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