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Related Experiment Video

Updated: Nov 12, 2025

Reprogramming Mouse Embryonic Fibroblasts with Transcription Factors to Induce a Hemogenic Program

Reprogramming Mouse Embryonic Fibroblasts with Transcription Factors to Induce a Hemogenic Program

Published on: December 16, 2016

Directed Evolution of an Enhanced POU Reprogramming Factor for Cell Fate Engineering.

Daisylyn Senna Tan¹, Yanpu Chen^2,3, Ya Gao¹

¹School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.

Molecular Biology and Evolution

|March 15, 2021

Summary

This summary is machine-generated.

Researchers engineered an enhanced POU factor (ePOU) that significantly improves the speed and efficiency of cell reprogramming. This novel factor can induce pluripotency with fewer transcription factors, accelerating cell fate transitions for potential clinical applications.

Keywords:

POU cell fate conversion molecular evolution protein engineering reprogramming transcription factor

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Last Updated: Nov 12, 2025

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Published on: December 16, 2016

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RNA-based Reprogramming of Human Primary Fibroblasts into Induced Pluripotent Stem Cells

RNA-based Reprogramming of Human Primary Fibroblasts into Induced Pluripotent Stem Cells

Published on: November 26, 2018

Area of Science:

Cell Biology
Molecular Biology
Biochemistry

Background:

Transcription factor-driven cell fate engineering is crucial for regenerative medicine but requires enhanced efficiency and speed.
Current methods for pluripotency induction, transdifferentiation, and forward reprogramming face limitations in clinical translation.

Purpose of the Study:

To develop and characterize an enhanced transcription factor variant for accelerated and more efficient cell fate conversion.
To investigate the molecular mechanisms underlying the improved reprogramming capabilities of the engineered factor.

Main Methods:

Directed evolution involving iterative screening of pooled mutant libraries and phenotypic selection.
Biochemical assays and genome-wide analyses to characterize the DNA binding and dimerization properties of the engineered factor.
Comparison of the engineered factor's performance against wild-type Oct4 in pluripotency induction assays.

Main Results:

An artificially evolved and enhanced POU factor (ePOU) was identified, demonstrating superior reprogramming speed and efficiency compared to wild-type Oct4.
ePOU can induce pluripotency with Sox2 alone or in a three-factor cocktail (ePOU/Klf4/c-Myc) without Sox2.
ePOU exhibits altered DNA binding preferences, increased thermodynamic stability, and prolonged persistence in cells, leading to differential gene activation and identification of novel signaling pathways involved in reprogramming.

Conclusions:

Engineered transcription factor variants, such as ePOU, can significantly advance cell fate conversions.
Phenotypic selection of novel factor variants is a key strategy for developing advanced biomolecules for cell reprogramming.
The findings highlight the potential of ePOU for accelerating the establishment of the pluripotency network and its implications for clinical translation.