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  • Title: Prognostic value of pS2 protein and receptors for epidermal growth factor (EGF-R), insulin-like growth factor-1 (IGF-1-R) and somatostatin (SS-R) in patients with breast and ovarian cancer.
    Author: Foekens JA, van Putten WL, Portengen H, Rodenburg CJ, Reubi JC, Berns PM, Henzen-Logmans SC, van der Burg ME, Alexieva-Figusch J, Klijn JG.
    Journal: J Steroid Biochem Mol Biol; 1990 Dec 20; 37(6):815-21. PubMed ID: 2178364.
    Abstract:
    The prognostic value of EGF-R, IGF-1-R and SS-R, and of cytosolic estrogen-regulated pS2 protein, was studied in patients (pts) with primary breast and advanced ovarian cancer. Ovarian cancer tissues were negative for pS2 (by immunoradiometric assay) IGF-1-R and EGF-R contents (by ligand binding assay, LBA) were of no or moderate prognostic value for breast cancer pts (n = 214). For advanced ovarian cancer pts, EGF-R content determined by LBA (n = 55) showed no prognostic value, whereas EGF-R status (n = 35) determined by immunohistochemistry (MoAb 2E9) significantly correlated with progression of disease (P less than 0.05). In breast cancer pts, both SS-R and pS2 showed no association with tumor size, nodal status and grade. For pS2 the best cut-off level with respect to relapse-free (RFS) and overall survival (OS) was found to be 11 ng/mg protein. Both SS-R (1 g% SS-R+, n = 135; P less than 0.04) and pS2 (27% pS2+, n = 197; P less than 0.001), which were mainly positive in ER+ tumors, were of prognostic value, especially within the subgroups with ER+/PgR+ tumors. Also within N+ and No pts the 5-yr RFS and OS showed a difference between pS2+ and pS2- (33 and 54% for N+, and 31 and 13% difference for No pts). In summary, SS-R and pS2 are valuable prognosticators in breast cancer pts, and prognostic significance of EGF-R in ovarian cancer pts needs further study.
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