Cell Culture Surface Patterning for Ultrasonic Cell Detachment
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Solution Overview
Problem
Existing methods for detaching adherent cells from culture vessels face challenges in achieving both high detachability and proliferation ability, often leading to reduced cell proliferation when attempting to weaken adhesion.
Innovation Solution
A cell culture vessel with a periodic recess/protrusion pattern on the culture surface, where the pitch and dimensions of the pattern are optimized to allow for efficient ultrasonic vibration detachment, maintaining a large cell adhesion area and facilitating detachment without reducing proliferation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If protrusions are formed on the culture surface to reduce adhesion area, then cell detachability is improved, but cell proliferation ability deteriorates
Solution Approach 1:
The patent applies ultrasonic vibration to the culture vessel to detach cells from the culture surface. The vibration unit generates ultrasonic waves that transmit through the culture vessel, causing mechanical oscillation of the culture surface and cells, thereby weakening adhesion bonds and facilitating cell detachment without requiring surface protrusions that would reduce proliferation ability
Solution Approach 2:
The patent replaces the mechanical adhesion-reduction approach (surface protrusions) with a dynamic vibration-based detachment method. Instead of modifying the static culture surface structure to reduce adhesion, the system uses ultrasonic vibration to dynamically disrupt adhesion bonds during the detachment process, preserving the flat culture surface that supports cell proliferation
2Ease of operation
If adhesion strength is weakened to facilitate detachment, then cell detachability is improved, but cell proliferation ability deteriorates
Solution Approach 1:
The patent employs periodic ultrasonic vibration to detach cells. The vibration unit applies oscillatory forces at ultrasonic frequencies to the culture vessel, creating periodic mechanical stress on the cell-adhesion interface. This periodic action gradually weakens adhesion bonds through cyclic loading without permanently compromising the adhesion strength required for cell proliferation during culture
3Productivity
If a flat culture surface is used to maintain large adhesion area, then cell proliferation ability is improved, but cell detachability deteriorates
Solution Approach 1:
The patent uses ultrasonic vibration to detach cells from the flat culture surface. The vibration unit transmits mechanical oscillations through the culture vessel, causing the culture surface and adhered cells to vibrate at ultrasonic frequencies. This mechanical vibration disrupts adhesion bonds between cells and the flat surface, enabling efficient detachment while preserving the large adhesion area provided by the flat culture surface for cell proliferation
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 method enables efficient detachment of cells while preserving their proliferation ability, allowing for increased cell harvest and improved culture efficiency.
Implementation Method 1
causing a vibrating unit arranged and configured to apply vibration to the culture vessel to generate ultrasonic vibration; and transmitting the ultrasonic vibration to the cell, to thereby detach the cell from the culture surface
Data Source
AI summary
To provide: a cell culture vessel that can achieve both detachability and proliferation ability, that is, can facilitate cell detachment without reducing the proliferation ability of cells; and a cell detachment method using the cell culture vessel, provided is a cell detachment method of detaching, through use of a culture vessel having a periodic recess/protrusion pattern on a culture surface, comprising a detachment step of: causing a vibrating unit in which, when an observation image of a cross section perpendicular to the culture surface is obtained, a length Lcp of a contour of the cell on the culture surface side in a measurement region of the observation image and a length Lf of the measurement region in a direction parallel to the culture surface satisfy Lcp>Lf; and transmitting the ultrasonic vibration to the cell, to thereby detach the cell from the culture surface.