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Oestrogen receptor ...
Oestrogen receptor co-activator AIB1 is a marker of tamoxifen benefit in postmenopausal breast cancer
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- Weiner, Maria (author)
- Linköpings universitet,Onkologi,Avdelningen för läkemedelsforskning,Hälsouniversitetet
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- Skoog, L (author)
- Karolinska Institute, Sweden
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- Fornander, T (author)
- Karolinska Institutet,Karolinska Institute, Sweden
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- Nordenskjöld, Bo (author)
- Östergötlands Läns Landsting,Linköpings universitet,Onkologi,Hälsouniversitetet,Onkologiska kliniken US
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- Sgroi, D C. (author)
- Massachusetts General Hospital, Boston, USA
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- Stål, Olle (author)
- Östergötlands Läns Landsting,Linköpings universitet,Onkologi,Hälsouniversitetet,Onkologiska kliniken US
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(creator_code:org_t)
- Oxford University Press, 2013
- 2013
- English.
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In: Annals of Oncology. - : Oxford University Press. - 0923-7534 .- 1569-8041. ; 24:8, s. 1994-1999
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Abstract
Subject headings
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- Background The oestrogen receptor (ER) co-activator amplified in breast cancer 1 (AIB1) has been suggested as a treatment predictive and prognostic marker in breast cancer. Studies have however not been unanimous.Patients and methods AIB1 protein expression was analysed by immunohistochemistry on tissue micro-arrays with tumour samples from 910 postmenopausal women randomised to tamoxifen treatment or no adjuvant treatment. Associations between AIB1 expression, clinical outcome in the two arms and other clinicopathological variables were examined.Results In patients with ER-positive breast cancer expressing low tumour levels of AIB1 (<75%), we found no significant difference in recurrence-free survival (RFS) or breast cancer-specific survival (BCS) between tamoxifen treated and untreated patients. In patients with high AIB1 expression (>75%), there was a significant decrease in recurrence rate (HR 0.40, 95% CI 0.26–0.61, P < 0.001) and breast cancer mortality rate (HR 0.38, 95% CI 0.21–0.69, P = 0.0015) with tamoxifen treatment. In the untreated arm, we found high expression of AIB1 to be significantly associated with lower RFS (HR 1.74, 95% CI 1.20–2.53, P = 0.0038).Conclusion Our results suggest that high AIB1 is a predictive marker of good response to tamoxifen treatment in postmenopausal women and a prognostic marker of decreased RFS in systemically untreated patients.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Cancer och onkologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cancer and Oncology (hsv//eng)
Keyword
- AIB1
- breast cancer
- HER2
- prognosis
- SRC-3
- treatment prediction
- MEDICINE
- MEDICIN
Publication and Content Type
- ref (subject category)
- art (subject category)
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