简介：
Overview
This article presents a protocol for TALEN-mediated gene editing at the AAVS1 locus to achieve high-efficiency transgene addition in human iPSCs. The process includes the delivery of TALEN and donor vectors, selection of iPSC clones, and verification of GFP expression.
Key Study Components
Area of Science
- Gene editing
- Stem cell biology
- Transgenic models
Background
- TALEN technology allows precise genome editing.
- AAVS1 is a recognized safe harbor for transgene integration.
- Inducible pluripotent stem cells (iPSCs) are valuable for research and therapy.
- GFP serves as a reporter gene for monitoring expression.
Purpose of Study
- To generate iPSC clones with targeted integration of a GFP gene.
- To establish a reliable method for gene editing in human iPSCs.
- To facilitate the creation of transgenic models for research.
Methods Used
- Delivery of TALEN and donor plasmids into iPSCs via nucleofection.
- Selection of successfully edited cells using puromycin.
- Isolation of individual GFP-expressing clones into a 96-well plate.
- Expansion of selected clones using standard iPSC culture techniques.
Main Results
- Successful integration of the GFP gene into the AAVS1 locus.
- Uniform expression of GFP confirmed by immunofluorescence microscopy.
- Flow cytometry analysis validated the efficiency of gene editing.
- Establishment of stable iPSC lines for future research.
Conclusions
- The protocol effectively generates targeted iPSC clones.
- GFP expression serves as a reliable marker for successful editing.
- This method can be applied to other genes and loci in iPSCs.
What is TALEN technology?
TALEN (Transcription Activator-Like Effector Nucleases) is a genome editing tool that allows for precise modifications in DNA.
Why is AAVS1 considered a safe harbor?
AAVS1 is a genomic locus that minimizes disruption to essential genes, making it ideal for stable transgene integration.
What is the significance of using GFP?
GFP (Green Fluorescent Protein) is used as a reporter to easily visualize and confirm gene expression in cells.
How are iPSC clones selected?
iPSC clones are selected based on their resistance to puromycin and expression of the GFP marker.
What techniques are used to confirm gene editing?
Immunofluorescence microscopy and flow cytometry are employed to validate GFP expression in edited iPSCs.
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