Title : Quantitative measurement of epidermal growth factor receptor is a negative predictive factor for tamoxifen response in hormone receptor positive premenopausal breast cancer.

Pub. Date : 2007 Jul 20

PMID : 17634479






8 Functional Relationships(s)
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1 Quantitative measurement of epidermal growth factor receptor is a negative predictive factor for tamoxifen response in hormone receptor positive premenopausal breast cancer. Tamoxifen epidermal growth factor receptor Homo sapiens
2 Here we assess the relationship between EGFR expression and tamoxifen response, with a new quantitative technology. Tamoxifen epidermal growth factor receptor Homo sapiens
3 RESULTS: In ER-positive patients, tamoxifen-treated patients with low EGFR expression (n = 113) showed a significant effect by 2 years of adjuvant tamoxifen (P = .01), in contrast to no treatment effect in the EGFR-high group (n = 73, P = .69). Tamoxifen epidermal growth factor receptor Homo sapiens
4 RESULTS: In ER-positive patients, tamoxifen-treated patients with low EGFR expression (n = 113) showed a significant effect by 2 years of adjuvant tamoxifen (P = .01), in contrast to no treatment effect in the EGFR-high group (n = 73, P = .69). Tamoxifen epidermal growth factor receptor Homo sapiens
5 RESULTS: In ER-positive patients, tamoxifen-treated patients with low EGFR expression (n = 113) showed a significant effect by 2 years of adjuvant tamoxifen (P = .01), in contrast to no treatment effect in the EGFR-high group (n = 73, P = .69). Tamoxifen epidermal growth factor receptor Homo sapiens
6 A significant beneficial effect of tamoxifen treatment was seen in the EGFR-low group (hazard ratio [HR] = 0.43 (95% CI, 0.22 to 0.84; P = .013) in contrast to no effect in the EGFR-high group (HR = 1.14; 95% CI, 0.59 to 2.22; P = .7) by using a Cox model. Tamoxifen epidermal growth factor receptor Homo sapiens
7 A significant beneficial effect of tamoxifen treatment was seen in the EGFR-low group (hazard ratio [HR] = 0.43 (95% CI, 0.22 to 0.84; P = .013) in contrast to no effect in the EGFR-high group (HR = 1.14; 95% CI, 0.59 to 2.22; P = .7) by using a Cox model. Tamoxifen epidermal growth factor receptor Homo sapiens
8 CONCLUSION: This study provides clinical evidence that confirms the basic work that has shown high EGFR can indicate resistance to tamoxifen. Tamoxifen epidermal growth factor receptor Homo sapiens