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p53 accumulation is a strong predictor of recurrence in estrogen receptor-positive breast cancer patients treated with aromatase inhibitors

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/55116

Title: p53 accumulation is a strong predictor of recurrence in estrogen receptor-positive breast cancer patients treated with aromatase inhibitors
Authors: Yamamoto, Mitsugu Browse this author
Hosoda, Mitsuchika Browse this author →KAKEN DB
Nakano, Kiichiroh Browse this author
Jia, Shusheng Browse this author
Hatanaka, Kanako C. Browse this author
Takakuwa, Emi Browse this author
Hatanaka, Yutaka Browse this author →KAKEN DB
Matsuno, Yoshihiro Browse this author
Yamashita, Hiroko Browse this author →KAKEN DB
Keywords: Aromatase inhibitor
breast cancer
endocrine therapy
p53
prognosis
Issue Date: Jan-2014
Publisher: Wiley-blackwell
Journal Title: Cancer science
Volume: 105
Issue: 1
Start Page: 81
End Page: 88
Publisher DOI: 10.1111/cas.12302
PMID: 24118529
Abstract: Aromatase inhibitors have played a central role in endocrine therapy for estrogen receptor (ER)-positive breast cancer in postmenopausal women. However, factors predictive of the efficacy of aromatase inhibitors, and prognostic factors, both for early and late recurrence in women treated with adjuvant aromatase inhibitors have not been identified. Whole genome analysis identified that a TP53 gene mutation exists in ER-positive breast cancers, although the frequency of TP53 gene mutation in luminal tumors is lower compared with basal-like or human epidermal growth factor receptor type 2 (HER2)-positive breast cancers. We examined expression of p53, as well as ER, progesterone receptor, HER2 and Ki-67 using immunohistochemistry in postmenopausal ER-positive breast cancer patients who were treated with aromatase inhibitors as adjuvant endocrine therapy. There were 53 (21%) tumors that contained 10% or more p53-positive cells. High p53 expression was positively correlated with tumor grade, HER2 score and Ki-67 expression. Significant association was observed between disease-free survival and high p53 expression in multivariate analysis (P<0.0001). Compared with women without recurrence, women with early recurrence had significantly higher p53 expression (P<0.0001), as did women with late recurrence (P=0.037). The present study demonstrates that p53 accumulation is a strong predictor of both early and late recurrence in ER-positive breast cancer patients treated with aromatase inhibitors as adjuvant endocrine therapy. TP53 gene alteration might be a key biological characteristic of ER-positive breast cancer.
Rights: http://creativecommons.org/licenses/by-nc/3.0/
Type: article
URI: http://hdl.handle.net/2115/55116
Appears in Collections:北海道大学病院 (Hokkaido University Hospital) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山下 啓子

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