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Targeted oligonucleotide delivery in human lymphoma cell lines using a polyethyleneimine based immunopolyplex
Vicent M Guillem1, Mar Tormo, Inés Moret
1Servei d' Hematologia i Oncologia, Hospital Clínic Universitari, Facultat de Medicina, Universitat de València, Avda Blasco Ibáñez 17, 46010, València, Spain.
Summary
This study introduces immunopolyplexes, a novel nonviral vector for targeted gene therapy delivery. These vectors demonstrate efficient and specific oligonucleotide transfer into human lymphoma cells, offering a promising advancement in antisense gene therapy.
Area of Science:
- Biotechnology
- Gene Therapy
- Nanomedicine
Background:
- Antisense gene therapy requires efficient oligonucleotide delivery into target cells.
- Polyethyleneimine-based polyplexes are effective transfection reagents but struggle with lymphoid cells.
- Targeted delivery vectors are crucial for enhancing therapeutic efficacy and reducing off-target effects.
Purpose of the Study:
- To develop and evaluate a targeted nonviral vector, termed immunopolyplex, for oligonucleotide delivery into human lymphoma cell lines.
- To investigate the specificity and efficiency of immunopolyplex-mediated oligonucleotide transfer.
- To explore the role of endocytosis in the mechanism of immunopolyplex activity.
Main Methods:
- Construction of immunopolyplexes using a polyplex backbone and an anti-CD3 antibody for targeting.
- In vitro assessment of oligonucleotide transfer using FITC-labeled oligonucleotides and CD3-positive (Jurkat) and CD3-negative (J.RT3-T3.5) cell lines.
- Evaluation of immunopolyplex activity in the presence and absence of endocytosis inhibitors.
Main Results:
- A nine-fold increase in fluorescence was observed in CD3-positive cells compared to CD3-negative cells, confirming specific oligonucleotide transfer.
- Immunopolyplexes showed significantly reduced activity in the presence of endocytosis inhibitors.
- Untargeted polyplexes exhibited lower fluorescence levels, highlighting the importance of the targeting moiety.
Conclusions:
- Immunopolyplexes represent an effective nonviral vector for targeted oligonucleotide delivery, particularly for lymphoid cells.
- The targeted delivery of oligonucleotides via immunopolyplexes occurs primarily through an endocytic pathway.
- The modular design of immunopolyplexes allows for easy modification of targeting elements for diverse therapeutic applications.