Related Experiment Video
Updated: Jun 1, 2026
12:58
Expression of Exogenous Cytokine in Patient-derived Xenografts via Injection with a Cytokine-transduced Stromal Cell Line
Published on: May 10, 2017
Post-transcriptionally regulated expression system in human xenogeneic transplantation models
Hui-Ling Rose Lee1, Chiann-Chyi Chen, Timor Baasov
1Department of Molecular Genetics, Microbiology and Immunology, Robert Wood Johnson Medical School-University of Medicine and Dentistry of New Jersey, Piscataway, New Jersey 08854, USA.
Summary
Researchers developed a novel gene therapy system using premature termination codons (PTCs) for precise gene expression control. This method allows therapeutic protein production only after readthrough agent administration, minimizing background expression.
Area of Science:
- Molecular Biology
- Gene Therapy
- Biochemistry
Background:
- Cells naturally distinguish premature termination codons (PTCs) from normal stop codons.
- PTCs are implicated in various genetic disorders.
- Readthrough agents promote translation past PTCs, offering therapeutic potential.
Purpose of the Study:
- To explore the application of PTCs in regulated gene therapy.
- To develop a system for inducible therapeutic protein production.
- To assess the efficacy and control of PTC-based gene expression.
Main Methods:
- Incorporation of PTCs into therapeutic genes.
- Administration of readthrough agents (e.g., NB54) to induce protein expression.
- Evaluation of expression levels, regulation cycles, and promoter effects in various cell types and in vivo models.
Main Results:
- Reduced background expression levels (0.01%–0.0005% of wild type).
- Successful multiple 'On' and 'Off' regulation cycles in vivo.
- Achieved three-log induction levels with aminoglycoside activators.
- Demonstrated adaptability across different promoters and cell types.
Conclusions:
- The PTC-based system offers highly controllable gene expression.
- This technology shows significant promise for clinical applications requiring precise gene regulation.
- The developed system is effective in both in vitro and in vivo settings.
