Use of UTF1 genetic control elements as iPSC reporter

Area of Science:

• Stem cell biology
• Epigenetics
• Molecular biology

Background:

• Cellular reprogramming into embryonic stem cells (ESCs) offers potential for regenerative medicine, disease modeling, and drug development.
• Reliable monitoring of the pluripotent stem cell state is crucial for these applications, especially in human cell reprogramming and high-throughput screening.
• Undifferentiated transcription factor 1 (UTF1) is a core pluripotency factor involved in ESC chromatin organization and its expression correlates with the pluripotent state.

Purpose of the Study:

• To develop a reliable reporter system for monitoring induced pluripotent stem cell (iPSC) formation and differentiation.
• To leverage the properties of UTF1 as a marker for pluripotency and cellular reprogramming.

Main Methods:

• Generated a reporter cassette based on human UTF1 genetic control elements.
• Integrated the reporter system into the genome for stable monitoring across cell passages.
• Validated the reporter system's functionality in a mouse model and across epigenetic states.

Main Results:

• Developed a compact reporter cassette (<2.3 kb) that remains functional after genomic integration and multiple cell passages.
• Demonstrated that human UTF1 regulatory elements function effectively in a mouse background.
• Confirmed the reporter's functionality in various epigenetic states, indicating its versatility.

Conclusions:

• The UTF1-based reporter system provides a reliable tool for monitoring iPSC generation and differentiation.
• This versatile system is valuable for iPSC research, particularly in disease modeling and drug discovery.
• The cross-species functionality (human elements in mouse) enhances its applicability in diverse research settings.