title: p53 as a specific prognostic factor in triple-negative breast cancer.
abstract: OBJECTIVE
  A recent suggestion is that the predictive value of a single biomarker may rely on the genetic background on the tumor and that different breast cancer subgroups may have different predictive markers of response to chemotherapy. The prognostic value of p53 in the outcome of adjuvant anthracycline-containing chemotherapy was evaluated according to molecular subclasses defined using the expression of estrogen receptor, progesterone receptor and human epidermal growth factor receptor 2.
  
  
  METHODS
  Subjects were patients (n = 135) with invasive ductal carcinoma treated with adjuvant anthracycline-based chemotherapy between 1994 and 2000 in our hospital. Clinico-pathological features were reviewed by retrospective examination of medical records.
  
  
  RESULTS
  Overall survival rate was not independently predictive by p53 status (P = 0.182). However, in triple-negative cases, there was statistically significant survival difference (P = 0.034) and no statistically significant difference (P = 0.783) in non-triple-negative cases by p53 status. In the Cox proportional hazard analysis, p53 was also strongly predictive for relapse-free survival (P = 0.013) and overall survival (P = 0.049) in triple-negative patients.
  
  
  CONCLUSIONS
  p53 status could be a specific prognostic factor in triple-negative breast cancer patients treated by adjuvant anthracycline-based regimen. When p53 is positive in triple-negative breast cancer, we could expect poor survival, prompting aggressive or alternative treatment.
authors.affiliation: Department of Surgery, Catholic University of Korea, Seoul, Republic of Korea
authors.forename: Byung Joo
authors.initials: BJ
authors.lastname: Chae
authors.forename: Ja Seong
authors.initials: JS
authors.lastname: Bae
authors.forename: Ahwon
authors.initials: A
authors.lastname: Lee
authors.forename: Woo Chan
authors.initials: WC
authors.lastname: Park
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Seo
authors.forename: Byung Joo
authors.initials: BJ
authors.lastname: Song
authors.forename: Jung Soo
authors.initials: JS
authors.lastname: Kim
authors.forename: Sang Seol
authors.initials: SS
authors.lastname: Jung
mesh_terms: D000328:Adult; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D014408:Biomarkers, Tumor / Q000378:metabolism*; D001943:Breast Neoplasms / Q000188:drug therapy / Q000235:genetics* / Q000401:mortality; D044584:Carcinoma, Ductal / Q000188:drug therapy / Q000235:genetics* / Q000401:mortality / Q000556:secondary; D017024:Chemotherapy, Adjuvant; D003520:Cyclophosphamide / Q000008:administration & dosage; D018572:Disease-Free Survival; D004317:Doxorubicin / Q000008:administration & dosage; D015251:Epirubicin / Q000008:administration & dosage; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis; D008875:Middle Aged; D015999:Multivariate Analysis; D011379:Prognosis; D016016:Proportional Hazards Models; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000378:metabolism; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism*
chemical_list: D014408:Biomarkers, Tumor; D003520:Cyclophosphamide; D004317:Doxorubicin; D015251:Epirubicin; D018719:Erb-b2 Receptor Tyrosine Kinases; D016159:Tumor Suppressor Protein p53