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Updated: Jul 18, 2026
Flow Cytometric Detection of Newly-formed Breast Cancer Stem Cell-like Cells After Apoptosis Reversal
Published on: January 26, 2019
[Proteomic analysis of paclitaxel-induced apoptosis in MCF-7 human breast carcinoma cells]
Feng Wu1, Qing-Ming Wang, Guo-Cai Fan
1Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing 100850, China.
Objective:
To investigate the mechanism of paclitaxel-induced apoptosis in MCF-7 human breast carcinoma cells.
Methods:
In this study, the proteins extracted from paclitaxel-induced apoptotic MCF-7 cells were analyzed by 2-dimentional gel electrophoresis (2-DE), and compared with those from untreated MCF-7 cells. The differential proteins were identified by mass spectrometry.
Results:
At 24 hour after paclitaxel (100 nmol/L) treatment, MCF-7 cells were collected and extracted the whole proteins. Seventeen up-regulated or down-regulated proteins were found by analysis of the differential proteomic 2-DE map. Six of them were identified by mass spectrometry. They were enolase 1, chloride intracellular channel 1, keratin 8, ribosomal protein S12, galectin-1 and histidine triad nucleotide binding protein, respectively.
Conclusion:
We effectively found the changed proteins in the process of paclitaxel-induced apoptosis in MCF-7 human breast carcinoma cells by proteomic techniques. These up-regulated or down-regulated proteins are important molecules for our further research about the mechanism of paclitaxel-induced apoptosis.
Insights
Paclitaxel treatment induces apoptosis in breast cancer cells by altering protein expression. Researchers identified six key proteins, including enolase 1 and galectin-1, involved in this process.
Area of Science:
- Proteomics
- Cancer Biology
- Molecular Oncology
Context:
- Paclitaxel is a crucial chemotherapy agent.
- Understanding paclitaxel's mechanism of action is vital for improving cancer therapy.
- MCF-7 cells are a widely used model for human breast adenocarcinoma.
Purpose:
- To investigate the proteomic changes associated with paclitaxel-induced apoptosis in MCF-7 cells.
- To identify specific proteins that are differentially expressed during paclitaxel-induced cell death.
- To elucidate the molecular mechanisms underlying paclitaxel's anti-cancer effects.
Summary:
- Proteins from paclitaxel-treated and untreated MCF-7 cells were analyzed using 2D gel electrophoresis and mass spectrometry.
- Seventeen differentially expressed proteins were detected, with six identified: enolase 1, chloride intracellular channel 1, keratin 8, ribosomal protein S12, galectin-1, and histidine triad nucleotide binding protein.
- These identified proteins play significant roles in cellular processes relevant to apoptosis.
Impact:
- This study provides a proteomic profile of paclitaxel-induced apoptosis in breast cancer cells.
- The identified proteins serve as potential biomarkers and therapeutic targets for breast cancer.
- Findings contribute to a deeper understanding of chemotherapy resistance and drug efficacy.
