Genetic Gate Circuits for Faster Pancreatic Lineage Programming
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Solution Overview
Problem
Existing methods for converting stem cells into pancreatic lineage cells are inefficient and time-consuming, often taking more than two weeks to achieve a significant conversion rate.
Innovation Solution
A heterologous genetic circuit comprising gate units that modulate the expression levels of specific target genes, such as FOX, SOX, GATA, bHLH, and Maf transcription factors, in a sequential manner to promote the conversion of stem cells into pancreatic lineage cells within two weeks, achieving a conversion rate of at least 5%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional methods are used for converting stem cells into pancreatic lineage cells, then the conversion process is slow and time-consuming, but the methods are simpler and less complex
Solution Approach 1:
The genetic circuit is divided into multiple gate units (first gate unit, second gate unit, third gate unit) that sequentially modulate different target genes. Each gate unit contains specific transcription factors (FOX, SOX, GATA, bHLH, Maf) that act on particular gene targets, breaking down the complex differentiation process into manageable sequential steps that achieve high conversion efficiency within two weeks
Solution Approach 2:
The heterologous genetic circuit is designed and constructed in advance with pre-configured gate units that are ready to sequentially activate target genes. The circuit includes pre-established regulatory elements and transcription factor combinations that are prepared beforehand to ensure rapid and efficient pancreatic lineage conversion when introduced to stem cells
2Loss of time
If the conversion process is accelerated to achieve high conversion rate within two weeks, then productivity improves, but the complexity of the genetic circuit increases
Solution Approach 1:
The genetic circuit employs a nested hierarchical structure where gate units are organized in sequences, with each gate unit containing nested transcription factors and regulatory elements. The first gate unit modulates initial target genes, which then activate the second gate unit, creating a nested cascade effect that accelerates conversion while maintaining organized structural complexity
Solution Approach 2:
The genetic circuit is designed to be dynamically active, with gate units that are sequentially activated and deactivated in a time-dependent manner. The circuit transitions from a dormant state to an active state upon introduction to stem cells, with each gate unit dynamically regulating gene expression levels to drive rapid pancreatic lineage conversion within the two-week timeframe
Data Source
AI summary
Provided herein are systems of modulating gene expression, methods of use thereof, and cells engineered thereof for the purpose of differentiating cells, for example beta cells.