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Interferon-alpha modulates resistance to cisplatin in three human hepatoma cell lines
A Takeuchi1, S Kaneko, E Matsushita
1First Department of Internal Medicine, School of Medicine, Kanazawa University, Japan.
Abstract:
We investigated the expression of the drug resistance-related genes, multidrug resistance gene 1 (MDR1), multidrug resistance associated protein gene (MRP), and the DNA topoisomerase IIalpha, DNA topoisomerase IIbeta, and glutathione-S-transferase pi gene (GST-pi) in three human hepatoma cell lines (HepG 2, HuH 7, SK-Hep-1) with or without drug treatment with interferon-alpha (IFN-alpha) and cisplatin (CDDP), by a reverse transcription-polymerase chain reaction (RT-PCR) method and a competitive PCR method. The signals of the MDR1, MRP, topoisomerase IIalpha, and topoisomerase IIbeta genes in HepG2 were weakened when IFN-alpha was added to CDDP. In SK-Hep-1, the administration of CDDP alone increased the signals of MDR1 while the addition of IFN-alpha decreased the signals, and the signals of GST-pi were decreased by IFN-alpha plus CDDP. In summary, our results concerning the expression of drug resistance-related genes in three human hepatoma cell lines demonstrate that IFN-alpha may modulate the mechanism of resistance to CDDP in liver cancer.
Insights
Interferon-alpha (IFN-alpha) may alter how liver cancer cells resist cisplatin (CDDP). This study examined key drug resistance genes in hepatoma cell lines, revealing IFN-alpha
Area of Science:
- Hepatocellular Carcinoma Research
- Molecular Biology
- Cancer Drug Resistance Mechanisms
Background:
- Hepatocellular carcinoma (HCC) exhibits significant resistance to chemotherapy.
- Understanding the molecular basis of drug resistance is crucial for effective HCC treatment.
Purpose of the Study:
- To investigate the expression of key drug resistance genes in human hepatoma cell lines.
- To determine the effect of interferon-alpha (IFN-alpha) and cisplatin (CDDP) on these genes' expression.
Main Methods:
- Utilized reverse transcription-polymerase chain reaction (RT-PCR) and competitive PCR.
- Analyzed gene expression of MDR1, MRP, topoisomerase IIalpha, topoisomerase IIbeta, and GST-pi.
- Tested three human hepatoma cell lines (HepG2, HuH 7, SK-Hep-1) with and without IFN-alpha and CDDP treatment.
Main Results:
- In HepG2 cells, IFN-alpha combined with CDDP weakened the expression of MDR1, MRP, topoisomerase IIalpha, and topoisomerase IIbeta.
- In SK-Hep-1 cells, CDDP alone upregulated MDR1, while IFN-alpha addition downregulated it. IFN-alpha plus CDDP decreased GST-pi expression.
Conclusions:
- IFN-alpha appears to modulate the mechanisms of CDDP resistance in liver cancer.
- These findings suggest potential therapeutic strategies involving IFN-alpha in combination treatments for HCC.