dsRNA Stabilization via Cross-Linking Agents
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Solution Overview
Problem
Exogenously applied double-stranded RNA (dsRNA) is prone to rapid degradation under harsh environmental conditions, limiting its stability and effectiveness in silencing gene expression in target organisms.
Innovation Solution
Incorporating a protein or amine cross-linking agent and/or acid into a composition to form a stabilizing layer around dsRNA, enhancing its persistence and biological activity, particularly using glutaraldehyde as a cross-linking agent and lactic or formic acid to extend the duration of gene silencing effects in soil environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If exogenously applied dsRNA is used under field conditions, then gene silencing effect is achieved in the short term, but the dsRNA degrades rapidly with a half-life of only 12 to 24 hours
Solution Approach 1:
The patent combines dsRNA with cross-linking agents (such as glutaraldehyde, formaldehyde, or epoxides) and/or acids (such as lactic acid or formic acid) to create a composite structure. This composite material forms a protective complex that shields the dsRNA from ribonuclease degradation, extending its persistence in the environment from 12-24 hours to substantially longer periods while maintaining gene silencing efficacy
Solution Approach 2:
The cross-linking agents and acids act as intermediary substances that bind to the dsRNA and form a protective layer or complex. This intermediary structure mediates between the dsRNA and the harsh environmental conditions (soil, moisture, enzymes), protecting the dsRNA from degradation without interfering with its biological function of gene silencing
2Duration of action of moving object
If dsRNA is encapsulated or bound to polymer to enhance stability, then duration of action is increased, but the complexity of the composition increases
Solution Approach 1:
The patent changes the chemical parameters of the dsRNA by introducing cross-linking agents and/or acids that modify its physical-chemical properties. Instead of using complex polymer encapsulation systems, the method employs simple chemical cross-linking that alters the dsRNA's resistance to degradation, achieving enhanced stability through parameter modification rather than structural complexity
Solution Approach 2:
The cross-linking agents and acids are applied locally to specific functional groups on the dsRNA molecule (such as amino groups or carboxylic acid groups), creating localized protective modifications rather than requiring complete encapsulation or uniform polymer coating. This localized approach achieves stability enhancement with minimal added complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method significantly extends the biological activity of dsRNA, maintaining effectiveness for up to 21 days in soil environments, compared to untreated dsRNA which degrades within 2 days, by forming a protective layer that resists degradation and maintains gene silencing efficacy.
Implementation Method 1
adding to a composition comprising the cell a compound having the function of a protein—or amine—cross linking agent
Implementation Method 2
the polyamine or protein will bind to carboxylic acid groups on the cell surface and will form an outer stabilizing layer after cross linking
Data Source
AI summary
Methods of substantially retaining or otherwise preserving the biological activity of a dsRNA, present in a cell, to post-transcriptionally silence the expression of a gene in a target organism, comprising the step of adding to the cell composition a compound having the function of a protein—or amine—cross linking agent and/or an acid, and compositions comprising the cells comprising dsRNA, and protein cross linking agents and/or acids, as well as the use of the cross linking agents and/or acids in the method.