Abstract:
:Expression of HOX transcript antisense intergenic RNA (HOTAIR)--a long non-coding RNA--has been examined in a variety of human cancers, and overexpression of HOTAIR is correlated with poor survival among breast, colon, and liver cancer patients. In this retrospective study, we examine HOTAIR expression in 164 primary breast tumors, from patients who do not receive adjuvant treatment, in a design that is paired with respect to the traditional prognostic markers. We show that HOTAIR expression differs between patients with or without a metastatic endpoint, respectively. Survival analysis shows that high HOTAIR expression in primary tumors is significantly associated with worse prognosis independent of prognostic markers (P = 0.012, hazard ratio (HR) 1.747). This association is even stronger when looking only at estrogen receptor (ER)-positive tumor samples (P = 0.0086, HR 1.985). In ER-negative tumor samples, we are not able to detect a prognostic value of HOTAIR expression, probably due to the limited sample size. These results are successfully validated in an independent dataset with similar associations (P = 0.018, HR 1.825). In conclusion, our findings suggest that HOTAIR expression may serve as an independent biomarker for the prediction of the risk of metastasis in ER-positive breast cancer patients.
journal_name
Breast Cancer Res Treatjournal_title
Breast cancer research and treatmentauthors
Sørensen KP,Thomassen M,Tan Q,Bak M,Cold S,Burton M,Larsen MJ,Kruse TAdoi
10.1007/s10549-013-2776-7subject
Has Abstractpub_date
2013-12-01 00:00:00pages
529-36issue
3eissn
0167-6806issn
1573-7217journal_volume
142pub_type
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journal_title:Breast cancer research and treatment
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