Overview
This article presents a protocol for reprogramming human adult fibroblasts into human induced pluripotent stem cells (hiPSC) using retroviral vectors. The process involves transducing fibroblasts with vectors encoding key transcription factors and identifying reprogrammed cells through live staining.
Key Study Components
Area of Science
- Stem Cell Biology
- Cell Reprogramming
- Transcription Factor Function
Background
- Induced pluripotent stem cells (hiPSC) can be generated from somatic cells.
- Retroviral vectors are commonly used for gene delivery in reprogramming.
- Key transcription factors involved include Oct3/4, Sox2, Klf4, and c-myc.
- Live staining techniques help identify successfully reprogrammed cells.
Purpose of Study
- To develop an efficient protocol for generating hiPSC from human fibroblasts.
- To utilize retroviral vectors for the introduction of transcription factors.
- To identify reprogrammed cells using specific antibodies.
Methods Used
- Transduction of human fibroblasts with retroviral vectors.
- Culture of infected fibroblasts on mouse embryonic feeder cells.
- Staining of cultures with TRA-1-81 antibody to identify positive colonies.
- Transfer of positive colonies to plates for further expansion.
Main Results
- Successful reprogramming of fibroblasts into hiPSC was achieved.
- Identification of reprogrammed colonies was confirmed through staining.
- Expanded colonies showed characteristics of pluripotent stem cells.
- The protocol demonstrated efficiency in generating hiPSC.
Conclusions
- The developed protocol is effective for reprogramming human somatic cells.
- Retroviral vectors are a viable method for introducing necessary transcription factors.
- Live staining is a reliable technique for identifying reprogrammed cells.
What are induced pluripotent stem cells?
Induced pluripotent stem cells (hiPSC) are somatic cells that have been reprogrammed to an embryonic stem cell-like state.
Why are retroviral vectors used in this protocol?
Retroviral vectors are used for their efficiency in delivering transcription factors into target cells for reprogramming.
How long are the fibroblasts cultured after transduction?
The fibroblasts are cultured for 14 to 28 days after transduction with the retroviral vectors.
What is the role of the TRA-1-81 antibody?
TRA-1-81 antibody is used to stain and identify colonies of successfully reprogrammed hiPSC.
What are the key transcription factors involved in this reprogramming?
The key transcription factors are Oct3/4, Sox2, Klf4, and c-myc.
What is the significance of using mouse embryonic feeder cells?
Mouse embryonic feeder cells provide a supportive environment for the growth and maintenance of pluripotent stem cells.
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