Abstract |
We investigated the correlation of ataxia-telangiectasia-mutated ( ATM) protein expression with clinicopathological features and prognosis in patients with breast cancer. ATM expression was determined by immunohistochemistry in 420 surgically resected breast tumors. ATM loss was observed in 126/407 evaluable cases (31.0 %), and was significantly associated with larger tumor size, lymph node metastasis, higher tumor grade, and ER- and/or PR-negative status. ATM loss was also associated with significantly lower disease-free survival rates than those in patients with intact ATM (5-year disease-free survival rate 81.2 vs. 90.7 %, p = 0.015). In multivariate analysis, ATM loss combined with abnormal p53 expression was an independent predictor of shorter disease-free survival [hazard ratio (HR) 3.48; 95 % confidence interval (CI), 1.48-8.17, p = 0.004]. A tendency towards a poorer prognosis was observed for tumoral ATM loss alone, although statistical significance was not reached (HR 1.74; 95 % CI 0.95-3.20; p = 0.075). In subgroup analysis, ATM loss was associated with shorter disease-free survival in patients who did not receive adjuvant anthracycline chemotherapy (5-year disease-free survival rate 92.7 % in intact ATM group vs. 68.1 % in ATM loss group, p = 0.002), but this poor prognosis was overcome in patients who did (5-year disease-free survival rate 89.8 vs. 84.4 %, p = 0.243), suggesting more benefit from anthracycline-based chemotherapy. Tumors with loss of ATM expression have a poor prognosis and their prognoses are dependent on the use of adjuvant anthracycline. ATM loss might be a practical tool for predicting benefits from anthracycline-based adjuvant therapy.
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Authors | Koung Jin Suh, Han Suk Ryu, Kyung-Hun Lee, Hyojin Kim, Ahrum Min, Tae-Yong Kim, Yaewon Yang, Hyeong-Gon Moon, Sae-Won Han, Do-Youn Oh, Wonshik Han, In Ae Park, Dong-Young Noh, Seock-Ah Im |
Journal | Breast cancer research and treatment
(Breast Cancer Res Treat)
Vol. 158
Issue 2
Pg. 233-41
(07 2016)
ISSN: 1573-7217 [Electronic] Netherlands |
PMID | 27329169
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Anthracyclines
- Antibiotics, Antineoplastic
- ATM protein, human
- Ataxia Telangiectasia Mutated Proteins
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Topics |
- Anthracyclines
(administration & dosage, therapeutic use)
- Antibiotics, Antineoplastic
(administration & dosage, therapeutic use)
- Ataxia Telangiectasia Mutated Proteins
(metabolism)
- Breast Neoplasms
(drug therapy, metabolism, pathology)
- Disease-Free Survival
- Down-Regulation
- Female
- Gene Expression Regulation, Neoplastic
- Humans
- Lymphatic Metastasis
- Middle Aged
- Neoplasm Grading
- Prognosis
- Survival Analysis
- Treatment Outcome
- Tumor Burden
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