Inkjet Cell Introduction Chamber for High-Uptake Low-Damage Delivery
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Solution Overview
Problem
Existing methods for introducing compounds into cells, such as those described in International Publication No. WO2008/153968, do not sufficiently improve compound introduction efficiency while ensuring biological safety.
Innovation Solution
A compound introduction apparatus with an inkjet-type ejection head that includes a processing chamber, supply and discharge flow channels, a backflow preventing unit, and pressurization units, utilizing heaters or piezoelectric elements to apply mechanical and thermal energy for efficient compound introduction while minimizing cell damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional introduction methods (chemical, biological, electroporation) are used, then compound introduction efficiency is improved, but biological safety deteriorates due to toxicity
Solution Approach 1:
The patent replaces chemical, biological, and electrical introduction methods with a purely mechanical system. An inkjet device generates bubbles that mechanically disrupt cell membranes through controlled expansion and collapse, enabling compound introduction without toxic chemicals, viruses, or electroporation, thus resolving the contradiction between efficiency and biological safety
Solution Approach 2:
The inkjet device utilizes phase transition of the introduction solution from liquid to gas (bubble formation) to generate mechanical force. The rapid phase change creates controlled mechanical stress on cell membranes, enabling efficient compound introduction while avoiding the toxicity associated with conventional methods
2Object-affected harmful factors
If inkjet device is used for compound introduction, then biological safety is improved, but compound introduction efficiency deteriorates
Solution Approach 1:
The inkjet device operates with periodic bubble generation, creating repeated mechanical stimulation of cell membranes. This periodic action enhances compound penetration efficiency compared to single-pulse methods, while maintaining the biological safety advantages of the mechanical approach
Solution Approach 2:
The system maintains continuous flow of cell suspension through the processing chamber with sustained bubble generation, ensuring that compound introduction action continues without interruption. This continuous operation improves overall efficiency while preserving the safety benefits of the inkjet-based mechanical approach
3Productivity
If cell suspension flows through micro-sized flow channel, then shear force is generated for compound introduction, but cell damage increases
Solution Approach 1:
The patent introduces gas bubbles as an intermediary mechanism to transfer mechanical energy to cell membranes. The bubbles expand and collapse within the flow channel, generating localized mechanical stress that facilitates compound introduction without requiring high shear forces that would damage cells
Solution Approach 2:
The system controls bubble size, generation frequency, and dissolution rate to optimize mechanical stress on cell membranes. By adjusting these parameters, the patent achieves effective compound introduction while minimizing cell damage from excessive shear force
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 apparatus enhances compound introduction efficiency while maintaining high biological safety by temporarily trapping cells in processing chambers, applying controlled stress to cell membranes, and reducing cell death rates.
Implementation Method 1
a thermal inkjet method utilizing bubble generation of a solvent
Implementation Method 2
a piezoelectric inkjet method utilizing deformation of a piezoelectric element
Implementation Method 3
a pressurization unit configured to pressurize the discharge flow channel
Implementation Method 4
a backflow preventing unit configured to prevent backflow of the cell suspension from the processing chamber into the supply flow channel
Data Source
AI summary
Provided is a compound introduction apparatus including: a processing chamber; a first heater that introduces an introduction-target compound into a cell inside the processing chamber; a supply flow channel for supplying a cell suspension containing the cell and the introduction-target compound to the processing chamber; a discharge flow channel for discharging the cell suspension from the processing chamber; a second heater that prevents backflow of the cell suspension from the processing chamber into the supply flow channel; and a third heater that pressurizes the discharge flow channel.