Highly efficient induced pluripotent stem cell reprogramming of cryopreserved lymphoblastoid cell lines

Area of Science:

• Stem Cell Biology
• Genetics
• Disease Modeling

Background:

• Induced pluripotent stem cell (iPSC) technology enables in-vitro modeling of human inherited disorders.
• Lymphoblastoid cell line (LCL) repositories offer valuable genetic and phenotypic data but are underutilized for iPSC reprogramming due to low efficiency.
• Efficient reprogramming of LCLs into iPSCs is crucial for unlocking their potential in disease modeling and gene discovery.

Purpose of the Study:

• To develop and detail a highly efficient protocol for reprogramming LCLs into iPSCs.
• To overcome the limitations of low reprogramming efficiency and poor success rates associated with LCLs.
• To facilitate the use of existing LCL bio-resources for disease modeling and gene identification.

Main Methods:

• Utilized EBNA1/OriP episomal plasmids encoding key pluripotency transcription factors (OCT3/4, SOX2, KLF4, L-MYC, LIN28).
• Incorporated mouse p53DD (a dominant-negative fragment of p53) to enhance reprogramming.
• Employed commercially available reprogramming media for optimized cell culture.

Main Results:

• Achieved consistently high reprogramming efficiency from LCLs to iPSCs.
• Demonstrated a 100% success rate in reprogramming, generating over 200 iPSC lines.
• Established a robust and reproducible protocol for LCL-to-iPSC conversion.

Conclusions:

• The developed protocol significantly improves the efficiency and success rate of LCL reprogramming into iPSCs.
• This advancement unlocks the potential of EBV-immortalized LCL repositories for disease modeling and genetic studies.
• Enables the generation of patient-specific iPSCs for a deeper understanding of inherited human disorders.