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ABCB1 Amplicon Contains Cyclic AMP Response Element-Driven TRIP6 Gene in Taxane-Resistant MCF-7 Breast Cancer Sublines

  • Petr Daniel
  • , Kamila Balušíková
  • , Radka Václavíková
  • , Karolína Šeborová
  • , Šárka Ransdorfová
  • , Marie Valeriánová
  • , Longfei Wei
  • , Michael Jelínek
  • , Tereza Tlapáková
  • , Thomas Fleischer
  • , Vessela N. Kristensen
  • , Pavel Souček
  • , Iwao Ojima
  • , Jan Kovář
  • Charles University
  • Czech National Institute of Public Health
  • Institute of Hematology and Blood Transfusion
  • Stony Brook University
  • University of Oslo

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A limited number of studies are devoted to regulating TRIP6 expression in cancer. Hence, we aimed to unveil the regulation of TRIP6 expression in MCF-7 breast cancer cells (with high TRIP6 expression) and taxane-resistant MCF-7 sublines (manifesting even higher TRIP6 expression). We found that TRIP6 transcription is regulated primarily by the cyclic AMP response element (CRE) in hypomethylated proximal promoters in both taxane-sensitive and taxane-resistant MCF-7 cells. Furthermore, in taxane-resistant MCF-7 sublines, TRIP6 co-amplification with the neighboring ABCB1 gene, as witnessed by fluorescence in situ hybridization (FISH), led to TRIP6 overexpression. Ultimately, we found high TRIP6 mRNA levels in progesterone receptor-positive breast cancer and samples resected from premenopausal women.

Original languageEnglish
Article number296
JournalGenes
Volume14
Issue number2
DOIs
StatePublished - Feb 2023

Keywords

  • ABCB1
  • CpG methylation
  • MCF-7
  • TRIP6
  • breast cancer
  • cAMP response element
  • gene amplification

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