Biodegradable nanoparticle-mediated K-ras down regulation for pancreatic cancer gene therapy
Chengbin Yang1, Rui Hu, Tommy Anderson
1School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore. ktyong@ntu.edu.sg.
Abstract:
RNA interference (RNAi) targeting the K-ras oncogene mutation in pancreatic cancer mediated by small interfering RNA (siRNA) transfection is a very promising treatment. However, the rapid degradation and negative charge of naked siRNAs restrict their direct delivery into cells. In this contribution, we propose a safe and effective transmembrane transport nanocarrier formulation based on a newly developed biodegradable charged polyester-based vector (BCPV) for K-ras siRNA delivery into pancreatic cancer cells. Our results have shown that these biodegradable and biocompatible vectors are able to transfect siRNAs targeting mutant K-ras into MiaPaCa-2 cells with high transfection and knockdown efficiency. More importantly, the RNAi process initiated a cascade gene regulation of the downstream proteins of K-ras associated with cell proliferation, migration, invasion and apoptosis. We observed that after the mutant K-ras siRNA transfection, the growth, migration and invasion of the MiaPaCa-2 cells were significantly reduced; also, the apoptosis of the pancreatic cancer cells was promoted. Although in vivo testing data are limited, we propose that the BCPV based nanoparticle formulation could be a promising candidate as non-viral vectors for gene therapy in clinical settings.
Insights
Biodegradable nanoparticles effectively deliver K-ras small interfering RNA (siRNA) into pancreatic cancer cells, inhibiting growth and promoting apoptosis. This novel vector shows promise for non-viral gene therapy applications.
Area of Science:
- Biomedical Engineering
- Oncology
- Gene Therapy
Background:
- RNA interference (RNAi) using small interfering RNA (siRNA) shows potential for targeting K-ras oncogene mutations in pancreatic cancer.
- Direct delivery of naked siRNAs is limited by rapid degradation and negative charge, hindering cellular uptake.
- Development of effective and safe delivery vectors is crucial for siRNA-based cancer therapy.
Purpose of the Study:
- To develop a biodegradable charged polyester-based vector (BCPV) for efficient K-ras siRNA delivery.
- To evaluate the transfection and gene knockdown efficiency of BCPV in pancreatic cancer cells.
- To investigate the impact of K-ras siRNA delivery on cancer cell proliferation, migration, invasion, and apoptosis.
Main Methods:
- Formulation of a novel biodegradable charged polyester-based vector (BCPV).
- Transfection of K-ras targeting siRNA using BCPV into MiaPaCa-2 pancreatic cancer cells.
- Assessment of transfection efficiency, K-ras knockdown, and downstream gene regulation.
- Evaluation of effects on cell proliferation, migration, invasion, and apoptosis.
Main Results:
- BCPV demonstrated high transfection and knockdown efficiency for K-ras siRNA in MiaPaCa-2 cells.
- RNAi initiated gene regulation of K-ras downstream proteins involved in cell growth and survival.
- Significant reduction in cancer cell growth, migration, and invasion, with increased apoptosis observed post-transfection.
Conclusions:
- The BCPV formulation is a safe and effective nanocarrier for K-ras siRNA delivery in pancreatic cancer.
- This approach successfully inhibited tumor cell progression and promoted apoptosis.
- BCPV-based nanoparticles represent a promising non-viral vector candidate for clinical gene therapy applications.
