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Updated: Jul 14, 2026
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Saturated Fatty Acids Induce Ceramide-associated Macrophage Cell Death
Published on: October 31, 2017
A CERTain role for ceramide in taxane-induced cell death
Richard Kolesnick1, Dario Altieri, Zvi Fuks
1Program of Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA. r-kolesnick@ski.mskcc.org
Cancer Cell
|June 15, 2007
Summary
Silencing spindle assembly checkpoint genes causes taxane resistance by promoting mitotic slippage. Unexpectedly, ceramide was found to regulate this process, offering a new target for cancer therapy.
Area of Science:
- Genomics
- Cancer Biology
- Cellular Stress Response
Background:
- Functional genomic screens can yield unexpected insights beyond their primary design.
- Taxane chemotherapy is a cornerstone treatment for many cancers, but resistance is a significant clinical challenge.
- Spindle assembly checkpoint (SAC) genes are crucial for accurate chromosome segregation during mitosis.
Purpose of the Study:
- To investigate the mechanisms underlying taxane resistance through a functional genomic screen.
- To identify novel regulators of the spindle assembly checkpoint and taxane-induced cell death.
- To explore potential therapeutic targets for overcoming taxane resistance.
Main Methods:
- Utilized a small interfering RNA (siRNA) screen to systematically silence genes involved in cell division.
- Assessed the impact of gene silencing on mitotic progression, cell death, and chromosomal integrity in the presence of taxanes.
- Investigated the role of identified regulatory molecules in taxane response.
Main Results:
- Silencing of SAC genes led to mitotic slippage, enabling cancer cells to escape taxane-induced apoptosis.
- This escape resulted in aneuploidy and chromosomal instability, characteristic features of taxane resistance.
- The sphingolipid ceramide was identified as a critical regulator of both the taxane-mediated SAC and taxane-induced cell death.
Conclusions:
- Functional genomic screening revealed an unexpected role for ceramide in regulating taxane response.
- Ceramide metabolism represents a viable target for modulating the efficacy of taxane-based cancer therapies.
- Understanding ceramide's function could lead to novel strategies to combat taxane resistance in tumors.
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