Relationship between estrogen receptor, progesterone receptor, HER-2 and Ki67 expression and efficacy of aromatase inhibitors in advanced breast cancer.
Ann Oncol
; 22(8): 1770-6, 2011 Aug.
Article
en En
| MEDLINE
| ID: mdl-21285137
ABSTRACT
BACKGROUND:
Surprisingly few data are published on the relevance of even commonly used biomarkers of response to aromatase inhibitors (AIs) in advanced breast cancer. Here, we aim to determine the effectiveness of AIs in that setting according to quantitative levels of estrogen receptor (ER), progesterone receptor (PgR) and Ki67 or human epithelial growth factor receptor-2 (HER-2) status. PATIENTS ANDMETHODS:
ER, PgR, HER-2 and Ki67 protein expressions were centrally assessed in 177 archival formalin-fixed paraffin-embedded primary or locally recurrent breast tumours from women who subsequently received AI treatment of advanced disease.RESULTS:
Among ER-positive patients (n = 146), higher PgR, but not ER, levels were associated with increased time to AI treatment failure (TTF). Higher Ki67 staining was associated with decreased TTF. ER-positive/HER-2-positive patients showed a non-significant trend for decreased TTF compared with ER-positive/HER-2-negative patients. PgR level, but not Ki67, remained a significant predictor of TTF in multivariate analysis of ER-positive patients.CONCLUSIONS:
Higher PgR and Ki67 levels are significantly associated with increased and decreased TTF, respectively, in ER-positive patients receiving AI treatment of advanced disease. The higher proliferation seen in PgR-negative tumours does not explain the poorer clinical responsiveness of this subgroup.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Neoplasias de la Mama
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Receptores de Progesterona
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Receptores de Estrógenos
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Receptor ErbB-2
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Antígeno Ki-67
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Inhibidores de la Aromatasa
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Biomarcadores Farmacológicos
Tipo de estudio:
Prognostic_studies
Límite:
Female
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Humans
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Middle aged
Idioma:
En
Revista:
Ann Oncol
Asunto de la revista:
NEOPLASIAS
Año:
2011
Tipo del documento:
Article
País de afiliación:
Reino Unido