Exosome Loading via Cell Perforation and Resealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for modifying exosomes for drug delivery, such as in vitro loading and ex vitro loading, face challenges in incorporating arbitrary proteins, lipids, carbohydrates, or nucleic acids, with low efficiency due to chemical properties and complexity of operations.
Innovation Solution
A method involving a semi-intact cell system and cell resealing technique using biological toxins with perforating activity, ATP, and calcium ions to prepare exosomes, allowing for the incorporation of various substances into exosomes, including proteins, lipids, carbohydrates, or nucleic acids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If in vitro loading method is used to load substances into extracellularly secreted exosomes, then exosomes can be prepared, but the operation becomes complicated and loading efficiency greatly depends on chemical properties of the substance
Solution Approach 1:
The patent uses cell membranes as an intermediary system to naturally package substances into exosomes. By introducing arbitrary substances into cells, the cell's natural exosome secretion mechanism packages these substances into exosomes, avoiding complicated external loading operations. This resolves the contradiction by using the cell itself as the loading mechanism rather than external chemical methods.
Solution Approach 2:
The patent employs the cell's own exosome secretion system to perform the loading function. Cells naturally secrete exosomes containing cytoplasmic components, and by introducing arbitrary substances into the cytoplasm, the cell's self-service mechanism automatically packages these substances into exosomes during normal secretion, eliminating the need for complex external loading procedures.
2Adaptability or versatility
If in vitro loading method is used, then exosomes can be prepared, but loading efficiency greatly depends on chemical properties of the substance to be loaded
Solution Approach 1:
The cell membrane and exosome secretion system serve as an intermediary that naturally packages diverse substances without depending on their chemical properties. The cell's biological machinery recognizes and packages various molecules (proteins, nucleic acids, lipids, carbohydrates) into exosomes through natural cellular processes, achieving universal loading efficiency independent of substance chemistry.
Solution Approach 2:
The patent changes the loading approach from chemical-based in vitro loading to biological-based in vivo loading. By shifting the loading environment from external chemical solutions to internal cellular environments, the system achieves consistent loading efficiency across different substance types through the cell's natural packaging mechanisms rather than chemical affinity-based loading.
3Adaptability or versatility
If ex vitro loading method is used to load substances into extracellularly secreted exosomes, then exosomes can be prepared, but the operation is complicated
Solution Approach 1:
The patent extracts the loading function from the complex external in vitro process and transfers it to the simple internal cellular process. By introducing substances directly into cells rather than attempting external loading of secreted exosomes, the method eliminates complicated purification, concentration, and loading steps, reducing overall process complexity while maintaining versatility.
Solution Approach 2:
The cell's natural exosome secretion system performs the loading function automatically without external intervention. The cell secretes exosomes containing the introduced arbitrary substances through its own biological machinery, eliminating the need for complex external loading equipment and procedures, thus simplifying the overall process while maintaining the ability to incorporate diverse substances.
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 enables efficient incorporation of arbitrary molecules into exosomes, facilitating their use in drug delivery and increasing exosome production, with the ability to purify and utilize them effectively.
Implementation Method 1
adding a biological toxin having a perforating activity to a medium containing cell
Implementation Method 2
adding ATP and incubating the mixture
Implementation Method 3
adding a medium containing calcium ion and incubating the mixture
Data Source
AI summary
The object of the present invention is to provide a method for incorporating an arbitrary protein, lipid, carbohydrate, or nucleic acid into an exosome. The object can be solved by a method for preparing an exosome, comprising the steps of: (a) adding a biological toxin having a perforating activity to a medium containing cells and incubating the mixture, (b) adding ATP and incubating the mixture, and (c) adding a medium containing calcium ion and incubating the mixture.