liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
HOXB13 protein expression predicts the benefit of tamoxifen treatment in breast cancer patients: in CANCER RESEARCH, vol 69, issue 2, Supplement 1, pp 358S-358S
Linköping University, Department of Clinical and Experimental Medicine, Oncology. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Clinical and Experimental Medicine, Oncology. Linköping University, Faculty of Health Sciences.
Karolinska University Hospital.
Karolinska University Hospital.
Show others and affiliations
2009 (English)In: CANCER RESEARCH, 2009, Vol. 69, no 2, 358S-358S p.Conference paper (Refereed)
Abstract [en]

Background: The two-gene expression ratio HOXB13:IL17BR, originally from a microarray analysis, has been shown to be indicative of clinical outcome in the setting of adjuvant tamoxifen monotherapy of breast cancer, with a high ratio associated with decreased disease-free survival. Analysis of a cohort of breast cancer patients randomized to 2 or 5 years of adjuvant tamoxifen therapy showed that the two-gene ratio and expression of the HOXB13 gene alone were predictive of the benefit of prolonged tamoxifen treatment. Patients with tumors expressing HOXB13 at high levels were unresponsive to prolonged adjuvant treatment, suggesting that this gene is involved in tamoxifen resistance. It is suggested that a high two-gene ratio may indicate impaired ER signaling, which is known to predict resistance to tamoxifen. To our knowledge, there are no studies investigating the HOXB13 protein levels in breast cancer.

Methods: We have analyzed the protein expression of HOXB13 with immunohistochemistry in tumor samples from 912 postmenopausal node negative breast cancer patients randomized to 2 years of tamoxifen or no endocrine treatment. After 2 years, recurrence-free patients were randomized to 3 more years of tamoxifen, or no further therapy. This selection enabled us to investigate the treatment predictive value of HOXB13.

Results: Data on HOXB13 protein expression were obtained from 866 patients (see table). Tamoxifen treated patients with estrogen receptor (ER) positive tumors expressing none or low levels of HOXB13 had a clear benefit from tamoxifen in terms of longer distant recurrence-free survival (hazard ratio (HR) 0.37, 95% CI 0.23-0.60, p=0.000048). However, for patients with a high or intermediate HOXB13 tumor expression, tamoxifen did not prolong the distant recurrence-free survival compared to the untreated patients (HR=0.83, 95% CI 0.45-1.54, p=0.55). The interaction between HOXB13 expression and benefit from tamoxifen was statistically significant (p=0.046). HOXB13 did not have any prognostic value among systemically untreated patients.

Place, publisher, year, edition, pages
2009. Vol. 69, no 2, 358S-358S p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-53872DOI: 10.1158/0008-5472.SABCS-6038ISI: 000262583201509OAI: diva2:292400
32nd San Antonio Breast Cancer Symposium 2009, December 10-13, San Antonio, USA
Available from: 2010-02-06 Created: 2010-02-06 Last updated: 2011-04-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Jerevall, Piiha-LottaNordenskjöld, BoStål, Olle
By organisation
OncologyFaculty of Health SciencesDepartment of Oncology UHL
Medical and Health Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 26 hits
ReferencesLink to record
Permanent link

Direct link