Transcription factors interfering with dedifferentiation induce cell type-specific transcriptional profiles

Area of Science:

• Cell Biology
• Molecular Biology
• Genetics

Background:

• Transcription factors (TFs) regulate cell differentiation, dedifferentiation, and direct conversion by controlling cell type-specific gene expression.
• The interplay between TFs governing distinct transcriptional profiles remains unclear.

Purpose of the Study:

• To investigate the functional interactions between TFs that maintain cell identity and those that induce pluripotency.
• To identify TFs that can prevent dedifferentiation and maintain cell-specific transcriptional profiles.

Main Methods:

• Overexpression of TFs in a neural-lineage cell line.
• Assessing interference with dedifferentiation induced by pluripotency factors.
• Evaluating the ability of TFs to induce cell-specific profiles in heterologous cell types.
• Analyzing TFs involved in dedifferentiation of hepatic-lineage cells.

Main Results:

• TFs inducing cell-specific profiles inhibit dedifferentiation caused by pluripotency TFs.
• A subset of TFs strongly interfered with dedifferentiation by maintaining cell-type-specific transcriptional profiles.
• These interfering TFs could induce cell-specific profiles in unrelated cell types.
• TFs preventing dedifferentiation in hepatic cells possessed known hepatic-lineage induction activity.

Conclusions:

• Dedifferentiation involves the suppression of cell type-specific transcriptional profiles.
• A small group of TFs capable of direct conversion primarily maintains these profiles.
• This TF activity is crucial for maintaining cell identity and may be applicable across various cell types.
• Identifying these TFs can advance understanding of differentiation and direct conversion processes.