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Updated: Jun 24, 2026

DNA Vector-based RNA Interference to Study Gene Function in Cancer
Published on: June 4, 2012
Therapeutic potential of RNA interference in drug-resistant cancers
1Charité Campus Mitte, Institute of Pathology, Berlin, Germany. hermann.lage@charite.de
Abstract:
Resistance including multidrug resistance to chemotherapy is a common clinical problem in patients suffering from cancer. Multidrug resistance is often mediated by overexpression of transmembrane xenobiotic transport molecules belonging to the superfamily of ATP-binding cassette (ABC)-transporters. Inhibition of ABC-transporters by low-molecular weight compounds in cancer patients has been extensively investigated in clinical trials, but the results have been disappointing. Thus, alternative experimental therapeutic strategies for overcoming multidrug resistance are under investigation. These include the application of RNA interference (RNAi) technology. Various RNAi strategies were applied to reverse multidrug resistance in different tumor models in vitro and in vivo. Results and conclusions of these RNAi studies as well as their potential impact for the development of potential RNAi therapeutics will be discussed.
Insights
Multidrug resistance in cancer hinders chemotherapy. RNA interference (RNAi) technology offers a promising alternative strategy to overcome this challenge by targeting ATP-binding cassette (ABC)-transporters, potentially leading to new cancer therapeutics.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Multidrug resistance (MDR) is a significant clinical challenge in cancer therapy.
- Overexpression of ATP-binding cassette (ABC)-transporters frequently mediates MDR.
- Previous attempts using small molecule inhibitors of ABC-transporters have yielded disappointing clinical results.
Purpose of the Study:
- To explore RNA interference (RNAi) as an alternative therapeutic strategy to overcome MDR in cancer.
- To review and discuss the application of various RNAi strategies in preclinical cancer models.
- To evaluate the potential of RNAi-based therapies for clinical development.
Main Methods:
- Investigated RNA interference (RNAi) strategies targeting ABC-transporter overexpression.
- Applied various RNAi approaches in in vitro and in vivo tumor models.
- Reviewed and analyzed existing study results on RNAi for MDR reversal.
Main Results:
- RNAi strategies have shown promise in reversing multidrug resistance in various cancer models.
- Successful application of RNAi in both in vitro and in vivo settings demonstrates its potential.
- The effectiveness of different RNAi approaches in overcoming MDR is being evaluated.
Conclusions:
- RNA interference (RNAi) technology presents a viable alternative for overcoming cancer multidrug resistance.
- Further research and development are needed to translate RNAi strategies into effective clinical therapeutics.
- Targeting ABC-transporters with RNAi holds significant potential for future cancer treatment.
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