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Updated: Mar 17, 2026

Spectrophotometric Screening for Potential Inhibitors of Cytosolic Glutathione S-Transferases
Published on: October 10, 2020
Glutathione-S-transferases and Chemotherapy Resistance of Hodgkin's Lymphoma Cell Lines
Toralf Bernig1, Stephanie Ritz1, Grit Brodt1
1Department of Pediatrics, Martin Luther University Halle-Wittenberg, Halle, Germany.
Background:
Glutathione-S-transferases (GSTs) are associated with multidrug resistance of tumor cells and are involved in drug detoxification and control of apoptosis. We analyzed the impact of GSTs on apoptosis of Hodgkin's lymphoma (HL) cells.
Materials And Methods:
Expression of GST isoforms in HL cell lines was assessed by analysis of DNA microarray data and quantitative reverse transcription-polymerase chain reaction (qRT-PCR). The impact of the GST inhibitor ethacrynic acid (EA) on HL cell survival was analyzed in vitro.
Results:
DNA microarray analysis and qRT-PCR analysis demonstrated higher expression of GST isoforms in chemoresistant HL cells. Therefore, GSTs may contribute to chemoresistance of HL cells. Incubation of GST-expressing chemoresistant L-1236 HL cells with EA significantly enhanced the activity of cisplatin against these cells.
Conclusion:
Our data suggest that the combined treatment with chemotherapy and GST inhibitors such as EA might be an interesting option for patients with chemoresistant HL.
Insights
Glutathione-S-transferases (GSTs) contribute to chemoresistance in Hodgkin
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Glutathione-S-transferases (GSTs) are implicated in tumor multidrug resistance, drug detoxification, and apoptosis regulation.
- Understanding GST involvement in Hodgkin's lymphoma (HL) is crucial for overcoming treatment resistance.
Purpose of the Study:
- To investigate the role of GSTs in the apoptosis of Hodgkin's lymphoma (HL) cells.
- To evaluate the potential of GST inhibitors in overcoming chemoresistance in HL.
Main Methods:
- Assessed GST isoform expression in HL cell lines using DNA microarray and quantitative reverse transcription-polymerase chain reaction (qRT-PCR).
- Evaluated the in vitro effect of the GST inhibitor ethacrynic acid (EA) on HL cell survival and chemosensitivity.
Main Results:
- Higher expression of GST isoforms was observed in chemoresistant HL cells, suggesting a role in chemoresistance.
- Ethacrynic acid (EA) significantly enhanced cisplatin efficacy in GST-expressing chemoresistant HL cells.
Conclusions:
- GSTs are associated with chemoresistance in Hodgkin's lymphoma.
- Combined therapy with chemotherapy and GST inhibitors like EA shows promise for treating chemoresistant HL.
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