AC Electric Field Selective Cell Destruction
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Solution Overview
Problem
Existing methods for destroying rapidly dividing cells, such as cancer cells or parasites, often damage normal cells as well, due to insufficient discrimination between dividing and non-dividing cells, leading to significant side effects and reduced therapeutic effectiveness.
Innovation Solution
Applying an alternating current (AC) electric field with specific frequency and field strength characteristics to target regions, taking advantage of the unique geometrical features of dividing cells during the division process, such as the formation of a cleavage furrow, to selectively damage dividing cells without affecting non-dividing cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods like radiation therapy and chemotherapy are used to destroy rapidly dividing cells, then tumor cells can be damaged or destroyed, but normal non-dividing cells are also damaged significantly
Solution Approach 1:
The patent applies different treatment approaches to different cell types based on their division state. Dividing cells (tumor cells) are targeted with electric field treatment that exploits their geometrical characteristics during mitosis, while non-dividing cells (normal cells) are spared by using treatment parameters that selectively affect only dividing cells. This local differentiation of treatment quality resolves the contradiction by making the therapy effective against tumor cells while minimizing harm to normal cells.
Solution Approach 2:
The patent changes the physical parameters of the treatment by using electric fields with specific frequencies and intensities that resonate with the geometrical changes occurring in dividing cells during mitosis. By tuning these parameters to match the temporal and spatial characteristics of cell division, the treatment selectively targets dividing cells while leaving non-dividing cells unaffected, thus resolving the contradiction between therapeutic effectiveness and normal cell preservation.
2Productivity
If existing cancer treatments are applied to destroy tumor cells, then cell multiplication can be controlled, but the treatments cause significant damage to normal tissues
Solution Approach 1:
The patent employs periodic electric field application synchronized with the mitotic cycle of dividing cells. The electric field is applied in cycles that correspond to the temporal progression of mitosis, exploiting the periodic geometrical changes that occur as cells divide. This periodic treatment approach enables control of cell multiplication while minimizing damage to normal tissues by timing the treatment to affect only cells in specific phases of division.
3Measurement precision
If radiation therapy and chemotherapy are used to treat tumors, then tumor cell sensitivity to treatment can be exploited, but the ability to distinguish between tumor cells and normal cells is insufficient
Solution Approach 1:
The patent uses electric fields that induce mechanical vibrations and stresses in dividing cells during mitosis, exploiting the transient geometrical changes and increased mechanical vulnerability of cells during division. The vibration and stress parameters are tuned to resonate with the dynamic structural changes in dividing cells, enabling precise discrimination between dividing tumor cells and non-dividing normal cells based on their mechanical responses, thus improving both measurement precision and selective treatment capability.
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 approach allows for the selective destruction of rapidly dividing cells with minimal impact on normal cells, reducing side effects and improving treatment accuracy compared to conventional methods like radiation therapy and chemotherapy.
Implementation Method 1
Applying an alternating current (AC) electric field with specific frequency and field strength characteristics to target regions
Implementation Method 2
taking advantage of the unique geometrical features of dividing cells during the division process
Data Source
Figure 1A~2A
Figure 2B
Figure 3A~3B
AI summary
Cells that are in the process division are vulnerable to damage by AC electric fields that have specific frequency and field strength characteristics. The selective disruption of rapidly dividing cells can therefore be accomplished by imposing an AC electric field in a target region for extended periods of time. Some of the cells that divide while the field is applied will be damaged, but the cells that do not divide will not be harmed. This selectively damages or disrupts rapidly dividing cells like parasites, but does not harm normal cells that are not dividing.