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Updated: Jan 28, 2026

Flow Cytometric Detection of Newly-formed Breast Cancer Stem Cell-like Cells After Apoptosis Reversal
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Flow Cytometric Detection of Newly-formed Breast Cancer Stem Cell-like Cells After Apoptosis Reversal

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Ambra1 inhibits paclitaxel-induced apoptosis in breast cancer cells by modulating the Bim/mitochondrial pathway

W L Sun1, L Wang1, J Luo1

  • 1Department of Medical Oncology, The Second Affiliated Hospital, Guangxi Medical University, Nanning, China.

Neoplasma
|February 21, 2019
PubMed

Insights

Autophagy/Beclin 1 regulator 1 (Ambra1) hinders apoptosis in breast cancer cells treated with paclitaxel. Ambra1 targets the Bim/mitochondrial pathway, suggesting it as a potential therapeutic target for breast cancer.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • Cancer cells frequently resist apoptosis, limiting anti-cancer drug effectiveness.
  • Autophagy/Beclin 1 regulator 1 (Ambra1) is a key protein in autophagy and apoptosis.
  • The precise role of Ambra1 in apoptosis regulation remains unclear.

Purpose of the Study:

  • To investigate Ambra1's role in paclitaxel-induced apoptosis in breast cancer cells.
  • To elucidate the molecular mechanisms by which Ambra1 influences apoptosis.

Main Methods:

  • Cell culture of breast cancer cell lines.
  • Apoptosis assays following paclitaxel treatment.
  • Western blotting to analyze protein expression (Ambra1, Bim).
  • Mitochondrial function assessment.

Main Results:

  • Ambra1 significantly inhibits paclitaxel-induced apoptosis in breast cancer cells.
  • Ambra1's inhibitory effect is mediated through the modulation of Bim expression.
  • Mitochondria are identified as crucial downstream effectors in the Ambra1-mediated pathway.

Conclusions:

  • Ambra1 confers resistance to paclitaxel-induced apoptosis in breast cancer by regulating the Bim/mitochondrial pathway.
  • Ambra1 represents a potential therapeutic target for overcoming drug resistance in breast cancer treatment.

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