Inhibition of transcription factor T-cell factor 3 (TCF3) using the oligodeoxynucleotide strategy increases embryonic...

Area of Science:

• Stem Cell Biology
• Molecular Biology
• Regenerative Medicine

Background:

• T-cell factor 3 (TCF3) acts as an intrinsic inhibitor of pluripotency genes in embryonic stem cells (ESCs).
• TCF3 influences the critical balance between stem cell pluripotency and differentiation pathways.
• Understanding TCF3's role is crucial for controlling stem cell fate.

Purpose of the Study:

• To investigate the effects of inhibiting the TCF3 transcription factor on the stemness of mouse ESCs (mESCs).
• To evaluate the efficacy of decoy oligodeoxynucleotides (ODNs) as a strategy for TCF3 inhibition.
• To explore TCF3 as a potential therapeutic target for maintaining stem cell properties.

Main Methods:

• Design and synthesis of TCF3 decoy and scramble oligodeoxynucleotides (ODNs).
• Electrophoretic mobility shift assay (EMSA) to confirm TCF3 decoy specificity.
• Assessment of mESC self-renewal and pluripotency using MTT assays, cell cycle analysis, apoptosis assays, alkaline phosphatase (ALP) activity, embryoid body (EB) formation, and real-time PCR.

Main Results:

• Transfection of decoy ODNs effectively knocked down TCF3 expression in mESCs.
• TCF3 knockdown resulted in increased mESC proliferation, elevated ALP enzyme activity, and upregulation of key stemness genes.
• A decrease in embryoid body (EB) number and diameter was observed following TCF3 inhibition.

Conclusions:

• TCF3 inhibition using decoy ODNs enhances the pluripotency and self-renewal capacity of mESCs.
• TCF3 represents a viable molecular target for maintaining stemness.
• Decoy ODN-mediated TCF3 knockdown offers a promising approach for stem cell research in regenerative medicine and cell therapy.