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Nuclear Receptor Coactivator 2 Promotes Human Breast Cancer Cell Growth by Positively Regulating the MAPK/ERK Pathway

Mengjiao Cai1,2, Xin Liang2,3, Xiao Sun1,2

  • 1Department of Oncology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.

Frontiers in Oncology
|April 4, 2019
PubMed

Insights

Nuclear receptor coactivator 2 (NCOA2) amplification and upregulation promote breast cancer growth. Silencing NCOA2 inhibits proliferation by affecting cell cycle and apoptosis, suggesting NCOA2 as a therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Nuclear receptor coactivator 2 (NCOA2), part of the p160 steroid receptor coactivator (SRC) family, is involved in various physiological and pathological processes.
  • The specific role of NCOA2 in breast cancer progression and its underlying mechanisms remain incompletely understood.

Purpose of the Study:

  • To investigate the role of NCOA2 in breast cancer.
  • To determine the potential of NCOA2 as a therapeutic target for breast cancer.

Main Methods:

  • Analysis of NCOA2 gene copy number and mRNA levels in breast cancer datasets (TCGA).
  • Experimental manipulation of NCOA2 expression (silencing) in breast cancer cell lines.
  • Assessment of cell proliferation, cell cycle, and apoptosis.
  • Whole-transcriptome sequencing (RNA-Seq) to identify downstream signaling pathways.

Main Results:

  • NCOA2 gene amplification (6-10%) and mRNA upregulation (11%) were observed in breast cancer.
  • NCOA2 silencing significantly suppressed breast cancer cell proliferation by inducing cell cycle arrest and apoptosis.
  • NCOA2 depletion led to the downregulation of the MAPK/ERK signaling pathway, potentially through its target RASEF.

Conclusions:

  • NCOA2 plays a significant role in promoting breast cancer cell proliferation.
  • NCOA2 acts through the MAPK/ERK signaling cascade.
  • NCOA2 represents a promising therapeutic target for breast cancer treatment.
Keywords:
MAPK/ERKNCOA2RASEFbreast cancertherapeutic target

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