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Author Spotlight: Tracing the Ferroptotic Signatures and Cell Death Dynamics in Medulloblastoma for Advanced Therapeutics
Published on: March 15, 2024
Artemisinin derivatives induce iron-dependent cell death (ferroptosis) in tumor cells
Edna Ooko1, Mohamed E M Saeed1, Onat Kadioglu1
1Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany.
Background:
Apoptosis and other forms of cell death have been intensively investigated in the past years to explain the mode of action of synthetic anticancer drugs and natural products. Recently, a new form of cell death emerged, which was termed ferroptosis, because it depends on intracellular iron. Here, the role of genes involved in iron metabolism and homeostasis for the cytotoxicity of ten artemisinin derivatives have been systematically investigated.
Material And Methods:
Log10IC50 values of 10 artemisinin derivatives (artesunate, artemether, arteether, artenimol, artemisitene, arteanuin B, another monomeric artemisinin derivative and three artemisinin dimer molecules) were correlated to the microarray-based mRNA expression of 30 iron-related genes in 60 cell lines of the National Cancer Institute (NCI, USA) as determined in 218 different microarray hybridization experiments. The effect of desferoxamine and ferrostatin-1 on the cytotoxicity of artenimol of CCRF-CEM cells was determined by resazurin assays. The mRNA expression of TFRC was exemplarily validated by immunohistochemical detection of transferrin receptor protein expression.
Results:
The mRNA expression of 20 genes represented by 59 different cDNA clones significantly correlated to the log10IC50 values for the artemisinins, including genes encoding transferrin (TF), transferrin receptors 1 and 2 (TFRC, TFR2), cerulopasmin (CP), lactoferrin (LTF) and others. The ferroptosis inhibitor ferrostatin-1 and the iron chelator deferoxamine led to a significantly reduced cytotoxicity of artenimol, indicating ferroptosis as cell death mode.
Conclusion:
The numerous iron-related genes, whose expression correlated with the response to artemisinin derivatives speak in factor for the relevance of iron for the cytotoxic activity of these compounds. Treatment with ferroptosis-inducing agents such as artemisinin derivatives represents an attractive strategy for cancer therapy. Pre-therapeutic determination of iron-related genes may indicate tumor sensitivity to artemisinins. Ferroptosis induced by artemisinin-type drugs deserve further investigation for individualized tumor therapy.
Insights
Artemisinin derivatives induce cancer cell death via ferroptosis, a process dependent on iron metabolism. Gene expression analysis revealed correlations between iron-related genes and drug sensitivity, suggesting potential for targeted cancer therapy.
Area of Science:
- Biochemistry
- Molecular Biology
- Cancer Research
Background:
- Apoptosis and other cell death forms are key to understanding anticancer drug mechanisms.
- Ferroptosis, a novel iron-dependent cell death pathway, has emerged as a significant area of research.
- This study investigates the role of iron metabolism genes in the cytotoxicity of artemisinin derivatives.
Purpose of the Study:
- To systematically investigate the role of genes involved in iron metabolism and homeostasis in the cytotoxicity of ten artemisinin derivatives.
- To correlate gene expression data with drug sensitivity to identify biomarkers for artemisinin efficacy.
- To explore ferroptosis as a mechanism of action for artemisinin derivatives in cancer therapy.
Main Methods:
- Correlated Log10IC50 values of 10 artemisinin derivatives with microarray-based mRNA expression of 30 iron-related genes in 60 NCI cell lines.
- Assessed the effect of deferoxamine (iron chelator) and ferrostatin-1 (ferroptosis inhibitor) on artemol cytotoxicity using resazurin assays.
- Validated mRNA expression of TFRC via immunohistochemical detection of transferrin receptor protein.
Main Results:
- Significant correlations were found between mRNA expression of 20 iron-related genes and artemisinin log10IC50 values, including genes for transferrin (TF), transferrin receptors (TFRC, TFR2), and ceruloplasmin (CP).
- Ferrostatin-1 and deferoxamine significantly reduced the cytotoxicity of artenimol, confirming ferroptosis as the mode of cell death.
- Expression of iron-related genes is linked to sensitivity to artemisinin derivatives.
Conclusions:
- The strong correlation between iron-related gene expression and artemisinin derivative response highlights iron's critical role in their cytotoxic activity.
- Artemisinin derivatives, as ferroptosis-inducing agents, represent a promising strategy for cancer therapy.
- Pre-therapeutic assessment of iron-related genes could predict tumor sensitivity to artemisinins, paving the way for individualized cancer treatment.
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