Extracellular Vesicle Loading With Carbohydrate-Conjugated Cargo
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for loading biologically active molecules into extracellular vesicles (EVs) often result in aggregation, damage to the vesicle membrane, and insufficient intracellular concentration of the active ingredient, necessitating a more efficient and less invasive method.
Innovation Solution
Loading EVs with biologically active molecules using hydrophilic compounds like carbohydrates, such as glucose and sucrose, which are chemically bound to the active agents, optionally with the aid of insulin, to enhance uptake and concentration without affecting the vesicle membrane integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional loading methods (sonication, electroporation, transfection) are used to load active molecules into EVs, then loading efficiency is improved, but membrane integrity is damaged and aggregation occurs
Solution Approach 1:
The patent uses cholesterol as an intermediary molecule that mediates the loading process by forming a complex with the active molecule (e.g., siRNA) and facilitating its incorporation into the EV membrane without direct physical or electrical disruption to the membrane structure
Solution Approach 2:
The patent changes the chemical parameters of the loading process by using chemical conjugation between cholesterol and the active molecule, and by controlling the composition ratio of cholesterol to active molecule, thereby achieving loading without mechanical or electrical stress that would damage the membrane
2Quantity of substance
If traditional loading methods are used, then some loading capacity is achieved, but intracellular concentration of active ingredient is insufficient
Solution Approach 1:
The patent creates a composite structure where cholesterol and the active molecule (e.g., siRNA) form a stable complex that is incorporated into the EV membrane, ensuring both high loading capacity and sufficient intracellular concentration through the synergistic interaction between the lipid and the active molecule
3Strength
If lipophilic compounds like cholesterol are used for loading, then membrane interaction is improved, but aggregation and disinformation occur
Solution Approach 1:
The patent optimizes the concentration ratio of cholesterol to active molecule and controls the chemical parameters of conjugation to achieve strong membrane interaction while preventing aggregation and disinformation through precise parameter control
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
This method achieves a higher concentration of active agents in EVs, up to 20% more than traditional methods, and ensures effective delivery to target cells without membrane damage.
Implementation Method 1
the active molecule is chemically bounded to a non-lipophilic compound that assists in enriching the EVs with the active molecules
Implementation Method 2
carbohydrates, such as glucose and sucrose, not only enter EVs but may incorporate active agents conjugated with them
Implementation Method 3
it is possible to facilitate the loading of EVs with the incorporation of active agents conjugated with glucose by adding insulin to the medium during the loading process
Data Source
AI summary
The present invention provides extracellular vesicles (EVs) loaded with conjugates of an active agent and a hydrophilic compound such as a carbohydrate, methods for preparation and loading of said EVs, composition comprising the EVs and uses thereof as well as conjugates of active agents and carbohydrates that may be loaded into EVs. In one embodiment, exosomes are loaded with conjugates of a siRNA to glucose.