CONSTRUCTING ARTIFICIAL GENETIC CIRCUITS TO CONTROL CELL FATE IN STEM CELL LINES

Abstract

The precise control of stem cell fate through engineered genetic circuits represents a significant advancement in synthetic biology with broad implications for regenerative medicine, disease modeling, and tissue engineering. In this study, we designed and implemented modular synthetic gene networks capable of directing cellular differentiation, maintaining pluripotency, and regulating gene expression in human stem cell lines. Our results demonstrate that the engineered circuits exhibited rapid and robust activation in response to diverse inducers, with the light-responsive system showing the shortest response time. Quantitative RT-PCR revealed significant upregulation of pluripotency markers such as OCT4, SOX2, and NANOG in circuit-modified cells, while DNA methylation analysis indicated epigenetic remodeling conducive to an undifferentiated state. I found that specific pathways pushed cells to differentiate into either neural or cardiac cells with higher success. Strong reporter activity and lasting signaling over time suggested the circuit remains functional. In addition, exploration with sensitivity tests and microfluidic equipment indicated that changing environmental conditions can be handled better by synthetic biology in cell fate choices. Examining the transcriptomes of individual cells, it was found that turning to circuits changed how cells behaved, while using computer modeling and machine learning made the design simpler and more accurate. The findings together reveal that synthetic circuits function reliably in stem cell control. The results of this research will support new forms of bioengineering and developmental systems.