Oligosaccharide Complexes for Nucleic Acid Delivery
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Solution Overview
Problem
Current methods for targeted delivery of nucleic acids face challenges due to instability and permeability issues, as well as manufacturing difficulties and poor safety and efficacy of existing lipid or polymer-based systems.
Innovation Solution
Development of cationic and/or ionizable oligosaccharide complexes that form specific compositions for targeted delivery of biological agents, including small molecules and nucleic acids, by using oligosaccharides with defined structures to enhance binding affinity and biological activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lipid or polymer-based systems are used for nucleic acid delivery, then delivery capability is achieved, but manufacturing difficulties and poor structural definition occur
Solution Approach 1:
The patent changes the chemical parameters by using oligosaccharide building blocks with specific functional groups (amines, hydroxyls, carboxylic acids) and controlled molecular weights (e.g., 2-10 kDa), enabling defined structures that are easier to manufacture while maintaining delivery capability. The modular design allows precise control over composition and structure.
Solution Approach 2:
The invention creates composite oligosaccharide structures combining multiple functional moieties (cationic groups for complexation, hydrophilic groups for stability, targeting groups for specificity) within a single defined molecular framework, achieving both manufacturability and delivery performance.
2Reliability
If lipid or polymer-based systems are used for nucleic acid delivery, then delivery capability is achieved, but high polydispersity occurs
Solution Approach 1:
The patent specifies narrow molecular weight ranges (2-10 kDa) and controlled degrees of substitution for oligosaccharide blocks, enabling monodisperse or narrowly polydisperse formulations. The modular assembly from defined building blocks ensures consistent structure and size distribution.
Solution Approach 2:
The oligosaccharide delivery system is segmented into discrete, well-defined building blocks (e.g., specific oligosaccharide units with 2-50 sugar residues) that can be precisely controlled during synthesis, resulting in uniform final products with low polydispersity.
3Reliability
If existing delivery systems are used, then nucleic acid delivery is achieved, but instability and permeability issues occur
Solution Approach 1:
The patent optimizes the charge density and hydrophilicity/hydrophobicity balance of oligosaccharide blocks to achieve stable complexes with nucleic acids. The controlled incorporation of cationic groups provides sufficient positive charge for complexation while maintaining colloidal stability and resistance to aggregation.
Solution Approach 2:
The oligosaccharide delivery vehicles are designed as biodegradable, transient structures that protect nucleic acids during delivery but naturally degrade after fulfilling their function, avoiding long-term stability issues and enabling controlled release without requiring complex stabilization mechanisms.
4Reliability
If existing delivery systems are used, then nucleic acid delivery is achieved, but poor safety and efficacy occur
Solution Approach 1:
The oligosaccharide delivery systems are designed to be biodegradable and transient, naturally breaking down after delivering their cargo. This eliminates long-term toxicity concerns associated with persistent lipid or polymer materials while maintaining effective delivery performance.
Solution Approach 2:
The patent optimizes the biocompatibility parameters of oligosaccharide blocks by selecting naturally occurring or biologically compatible sugar units and functional groups, reducing immunogenicity and toxicity while maintaining delivery efficacy. The controlled charge density prevents excessive cellular activation or damage.
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 oligosaccharide complexes demonstrate improved binding affinity and biological activity, achieving significant RNA expression enhancements, such as 1000× and 500× improvements compared to non-methylated versions, while maintaining similar hydrodynamic diameters, indicating effective and efficient delivery.
Implementation Method 1
cationic and/or ionizable oligosaccharide complexes
Data Source
AI summary
The present disclosure provides compositions comprising an oligosaccharide of formula (I), wherein said compositions are useful for delivery of certain agents, including, for example, nucleic acids.