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SP3 is associated with migration, invasion, and Akt/PKB signalling in MDA-MB-231 breast cancer cells

Mohammed A Mansour1,2

  • 1Division of Human Sciences, School of Applied Sciences, London South Bank University, London, UK.

Journal of Biochemical and Molecular Toxicology
|October 28, 2020
PubMed

Insights

Specificity proteins (SPs) drive cancer growth. This study shows SP3 is overexpressed in breast cancer and promotes tumor progression by impacting Akt signaling, identifying it as a potential therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Specificity proteins (SPs) are implicated in cancer progression, including proliferation, migration, invasion, and angiogenesis.
  • Antineoplastic drugs often target SP protein depletion, yet the specific role of SP3 remains unclear.

Purpose of the Study:

  • To investigate the function of SP3 in invasive breast cancer.
  • To elucidate the molecular mechanisms underlying SP3's role in breast cancer progression.

Main Methods:

  • Analysis of SP3 expression in invasive breast cancer cells compared to normal cells.
  • Gene expression analysis using The Cancer Genome Atlas (TCGA) datasets.
  • RNA interference (RNAi) to deplete SP3 and assess its impact on Akt phosphorylation.

Main Results:

  • SP3 is significantly overexpressed in invasive breast cancer cells.
  • SP3 expression correlates with Akt signaling proteins, G protein subunit alpha 13, and RAB33B in cancer datasets.
  • SP3 depletion via RNAi reduces Akt phosphorylation at serine and threonine sites.

Conclusions:

  • SP3 exhibits pro-oncogenic functions in breast cancer, acting as a nononcogene addiction gene.
  • SP3 influences breast cancer progression through modulation of the Akt signaling pathway.
  • Further research is warranted to explore SP3's gene regulatory functions and downstream targets in breast cancer.
Keywords:
Akt signallingGNA13SP3breast cancertranscription factor

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