Pancreatic cancer gene therapy using an siRNA-functionalized single walled carbon nanotubes (SWNTs) nanoplex
Tommy Anderson1, Rui Hu, Chengbin Yang
1School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore. ktyong@ntu.edu.sg.
Abstract:
The discovery of RNA interference (RNAi) has created a new platform for cancer therapy applications. This approach utilizes small interfering RNA (siRNA) molecules to regulate the expression of a specific target gene and subsequently suppresses the growth of the cancer cells. However, the formulation of free siRNAs alone is incapable of transfecting cells as they are negatively charged and degrade in biological fluids. For successful siRNA transfection, a biocompatible and functional carrier is needed. In this contribution, we demonstrated the preparation of functionalized single walled carbon nanotubes (SWNTs) as efficient siRNA carriers and utilized the SWNTs/siRNA nanoplex for the in vitro gene therapy of pancreatic cancer. Through fluorescent imaging and quantitative flow cytometric analysis, we observed a high siRNA transfection efficiency mediated by the nanoplex formulation. We demonstrated the successful internalization of the nanoplex by the pancreatic cancer cell and the subsequent release of the siRNAs from the nanoplex, which resulted in a down-regulation of the target gene. In addition, the functionalized SWNTs proved to be highly biocompatible as assessed by cell viability tests. Our results suggest that in the near future the SWNTs may be able to serve as a multifunctional nanoplatform for the in vivo targeted gene therapy of pancreatic cancer.
Insights
Functionalized single-walled carbon nanotubes (SWNTs) effectively deliver small interfering RNA (siRNA) into pancreatic cancer cells. This nanocarrier facilitates gene therapy by down-regulating target genes, showing promise for future cancer treatments.
Area of Science:
- Biotechnology
- Nanomedicine
- Cancer Therapy
Background:
- RNA interference (RNAi) offers a novel cancer therapy strategy using small interfering RNA (siRNA).
- Free siRNA struggles with cell transfection due to negative charge and degradation; a functional carrier is essential.
- Pancreatic cancer remains a challenging disease requiring innovative therapeutic approaches.
Purpose of the Study:
- To develop functionalized single-walled carbon nanotubes (SWNTs) as efficient carriers for siRNA delivery.
- To evaluate the efficacy of SWNTs/siRNA nanoplexes for in vitro gene therapy of pancreatic cancer.
- To assess the biocompatibility and transfection efficiency of SWNTs in pancreatic cancer cells.
Main Methods:
- Preparation and functionalization of single-walled carbon nanotubes (SWNTs).
- Formation of SWNTs/siRNA nanoplexes for gene delivery.
- In vitro transfection of pancreatic cancer cells using nanoplexes.
- Fluorescent imaging and flow cytometry to assess siRNA uptake and transfection efficiency.
- Cell viability assays to determine SWNT biocompatibility.
Main Results:
- High siRNA transfection efficiency was achieved using the SWNTs/siRNA nanoplex.
- Successful internalization of nanoplexes and subsequent release of siRNA within pancreatic cancer cells.
- Demonstrated down-regulation of the target gene, confirming therapeutic effect.
- Functionalized SWNTs exhibited high biocompatibility in cell viability tests.
Conclusions:
- Functionalized SWNTs are effective and biocompatible carriers for siRNA delivery in pancreatic cancer therapy.
- SWNTs show potential as a multifunctional nanoplatform for in vivo targeted gene therapy.
- This approach offers a promising strategy for advancing pancreatic cancer treatment through nanomedicine.
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