Endogenous Silencing Insertion for Precise Gene Targeting
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Solution Overview
Problem
Current methods for silencing gene expression in eukaryotic cells, such as transgenic RNAi, often require significant genetic modifications and introduce exogenous sequences, which can be inefficient and raise regulatory concerns, particularly in agriculture where crops like bananas and coffee plants are difficult to improve through traditional breeding.
Innovation Solution
An improved system that uses an endogenous silencing sequence with minimal nucleotide changes to generate a silencing insertion, which is inserted into the genome, allowing for specific silencing of target genes with high efficiency and minimal genetic disruption, maintaining the endogenous sequence arrangement and avoiding exogenous DNA in non-endogenous arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transgenic RNAi methods are used to silence gene expression, then gene silencing can be achieved, but significant genetic modifications and exogenous sequences are introduced
Solution Approach 1:
The invention modifies only the essential targeting region of the silencing sequence to achieve specificity for the target gene, while leaving the promoter, terminator, and other regulatory elements unchanged and endogenous. This localized modification approach reduces overall genetic complexity while maintaining silencing functionality.
Solution Approach 2:
The invention changes minimal nucleotide parameters in the silencing sequence to redirect it toward the target gene, rather than introducing entirely new transgenic constructs. This parameter change strategy achieves gene silencing with reduced genetic modification complexity.
2Ease of manufacture
If endogenous silencing sequences are modified with minimal nucleotide changes, then regulatory issues are reduced and consumer acceptance improves, but achieving specific silencing of target genes becomes more challenging
Solution Approach 1:
The invention applies local quality modification by changing only the essential nucleotides in the silencing sequence that are directly responsible for target recognition, while keeping the rest of the sequence endogenous. This ensures both regulatory acceptance and precise target gene silencing.
Solution Approach 2:
The invention substitutes the traditional mechanical approach of introducing entire transgenic constructs with a more precise molecular editing approach that modifies only specific nucleotide sequences, achieving both regulatory compliance and functional precision.
3Productivity
If random insertion of silencing sequences is used, then transformation efficiency increases and targeting sequences are not needed, but precise control of silencing in desired tissues and conditions is reduced
Solution Approach 1:
The invention merges the advantages of random insertion (high transformation efficiency) with the benefits of tissue-specific control by using endogenous regulatory elements that are already integrated into the silencing sequence. The endogenous promoter and terminator ensure proper spatial and temporal expression patterns.
Solution Approach 2:
The endogenous silencing sequence serves itself by providing its own regulatory elements (promoter, terminator, tissue-specificity signals) that automatically ensure correct expression patterns without requiring additional targeting sequences or complex regulatory constructs.
Data Source
AI summary
The present invention relates to improved methods and products for silencing expression of target genes in eukaryotic cells.