Related Experiment Video
Updated: Oct 20, 2025
06:10
Non-Viral Engineering of Primary Human T Cells via Homology-Mediated End-Joining Targeted Integration of Large DNA Templates
Published on: May 9, 2025
560
Optimized two-step electroporation process to achieve efficient nonviral-mediated gene insertion into primary T cells
Ming Yang1, Diane Tkach1, Alex Boyne1
1Cellectis Inc, New York, NY, USA.
FEBS Open Bio
|September 12, 2021
Summary
This study optimized nonviral gene knock-in in T cells using transcription activator-like effector nucleases (TALENs). A novel two-step transfection protocol significantly improved transgene integration efficiency for developing CAR-T cell therapies.
Area of Science:
- Molecular Biology
- Gene Therapy
- Immunotherapy
Background:
- Gene editing technologies enable precise transgene insertion.
- Viral vectors for gene editing increase manufacturing costs and timelines.
- Nonviral gene knock-in using naked DNA faces challenges like cytotoxicity.
Purpose of the Study:
- To investigate the kinetics of TALEN-mediated gene editing in primary T cells.
- To develop an efficient nonviral gene knock-in strategy for therapeutic applications.
- To improve the generation of 'off-the-shelf' CAR-T cells.
Main Methods:
- Studied TALEN-mediated gene editing kinetics in primary T cells.
- Developed a rapid, efficient gene insertion strategy using naked DNA (ssODNs or linear dsDNA).
- Implemented a time-controlled two-step transfection protocol.
Main Results:
- Achieved efficient nonviral gene knock-in in primary T cells.
- Demonstrated substantial improvement in transgene integration efficiency.
- Successfully inserted a chimeric antigen receptor (CAR) into the TRAC locus of T cells.
Conclusions:
- A time-controlled two-step transfection protocol enhances nonviral gene insertion efficiency in primary T cells.
- This method enables efficient generation of 'off-the-shelf' CAR-T cells.
- Nonviral gene knock-in strategies offer a cost-effective alternative to viral vectors for therapeutic development.
