title: Correlation of clinicopathological parameters with HGF, c-Met, EGFR, and IGF-1R expression in uveal melanoma.
abstract: This study evaluated the expression profile of hepatocyte growth factor (HGF), c-Met, epidermal growth factor receptor (EGFR), insulin-like growth factor-1 receptor (IGF-1R), and vitreal and serum EGF, HGF, IGF-1 levels in patients with uveal melanoma and assessed their correlation with the clinicopathological parameters. Forty patients with uveal melanoma were included in the study. Clinicopathological parameters were evaluated with hematoxylin-eosin staining. HGF, c-Met, EGFR, and IGF-1R expressions were evaluated immunohistochemically. HGF, EGF, and IGF-1 levels were measured with enzyme-linked immunosorbent assay in vitreous and serum specimens taken at enucleation and 6 months after the enucleation. HGF, c-Met, IGF-1R, and EGFR expressions were detected in 57.5, 20, 20, and 12.5% of cases, respectively. IGF-1R expression was significantly correlated with the degree of pigmentation, necrosis, and lymphocyte infiltration (P=0.013, 0.04, and 0.017). EGFR expression was significantly correlated with the mitosis rate (P=0.02). Vitreal EGF and serum IGF-1 levels were significantly higher in patients with scleral invasion (15.72+/-29.13, 199.01+/-154.01 pg/ml, respectively) when compared with the patients without invasion (0.56+/-1.05, 33.01+/-36.52 pg/ml) (P=0.03 and 0.015). When the preoperative and postoperative serum growth factor levels were compared, the serum EGF level was found to be lower (125.93+/-62.84, 100.02+/-31.19 pg/ml, P=0.007) and the serum IGF-1 level (165.81+/-153.6, 301.35+/-131.24 pg/ml, P<0.001) was found to be higher in the postoperative 6-month specimens. Uveal melanomas express HGF, c-Met, EGFR, and IGF-1R. Vitreal growth factor levels and expression of EGFR and IGF-1R are correlated with some clinicopathological parameters. IGF-1 and EGF may have a role in the development and progression of uveal melanoma.
authors.affiliation: Ocular Oncology Service, Hacettepe University School of Medicine, Ankara, Turkey.
authors.forename: Pinar
authors.initials: P
authors.lastname: Topcu-Yilmaz
authors.forename: Hayyam
authors.initials: H
authors.lastname: Kiratli
authors.forename: Arzu
authors.initials: A
authors.lastname: Saglam
authors.forename: Figen
authors.initials: F
authors.lastname: Söylemezoglu
authors.forename: Gülsen
authors.initials: G
authors.lastname: Hascelik
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000235:genetics / Q000378:metabolism; D004797:Enzyme-Linked Immunosorbent Assay; D066246:ErbB Receptors / Q000235:genetics / Q000378:metabolism*; D005260:Female; D017228:Hepatocyte Growth Factor / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008545:Melanoma / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D008875:Middle Aged; D019859:Proto-Oncogene Proteins c-met / Q000235:genetics / Q000378:metabolism*; D017526:Receptor, IGF Type 1 / Q000235:genetics / Q000378:metabolism*; D014604:Uveal Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology
chemical_list: D014408:Biomarkers, Tumor; C066855:HGF protein, human; D017228:Hepatocyte Growth Factor; D066246:ErbB Receptors; D019859:Proto-Oncogene Proteins c-met; D017526:Receptor, IGF Type 1