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Live-imaging of Breast Epithelial Cell Migration After the Transient Depletion of TIP60
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Quantifying Tip60 (Kat5) stratifies breast cancer.

A McGuire1, M C Casey1, A Shalaby2

  • 1Discipline of Surgery, School of Medicine, Lambe institute for Translational Research, National University of Ireland, Galway, Ireland.

Scientific Reports
|March 9, 2019
PubMed
Summary
This summary is machine-generated.

Tip60 protein expression can improve breast cancer stratification. Low Tip60 mRNA levels are linked to poorer survival and increased risk of breast cancer recurrence.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Biomarker Discovery

Background:

  • Breast cancer subtypes are defined by Her2/Neu, Estrogen Receptor (ER), and Progesterone Receptor (PR) status, but exhibit significant heterogeneity.
  • Current biomarkers limit precise stratification, hindering personalized treatment and outcome prediction.
  • Tip60, a histone acetyltransferase (HAT), is involved in DNA repair and gene regulation, pathways crucial for cancer development and chemotherapy response.

Purpose of the Study:

  • To investigate if quantifying Tip60 protein staining patterns enhances breast cancer patient stratification.
  • To determine the association of Tip60 expression patterns with established breast cancer subtypes, receptor status, and tumor grade.
  • To evaluate the correlation between Tip60 expression and patient survival outcomes, including overall survival and relapse-free survival.

Main Methods:

  • Tip60 protein expression was quantified in vivo using a breast cancer tissue microarray (n=337).
  • Analysis included Tip60 location (cytoplasmic, nuclear), percentage of positive cells, and staining intensity.
  • Correlation analyses were performed to associate Tip60 patterns with clinical parameters and survival data.

Main Results:

  • Specific Tip60 staining patterns were significantly associated with breast cancer subtype, ER/PR status, and tumor grade.
  • Low Tip60 mRNA expression demonstrated a significant correlation with poorer overall survival and reduced relapse-free survival.
  • Tip60 protein quantification revealed distinct patterns linked to clinical characteristics.

Conclusions:

  • Tip60 serves as a valuable biomarker for improved breast cancer stratification.
  • Low Tip60 expression is identified as a significant risk factor for increased disease recurrence.
  • Tip60's role in genome maintenance and DNA repair pathways underscores its importance in breast cancer progression and therapeutic response.