Magnetic Bead Transfer Module for Automated Nucleic Acid Extraction
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Solution Overview
Problem
Current methods for extracting nucleic acids using magnetic beads face challenges such as long reaction times in automated liquid handling systems and high costs due to reagent waste in bead transfer-type methods, as well as the need for additional equipment for PCR preparations.
Innovation Solution
A novel magnet module and cover module system that allows for automated bead transfer-type method execution within an automated liquid handling apparatus, utilizing a rod with magnetic force-generating material and a tube for guiding the rod, enabling efficient nucleic acid extraction with reduced reagent usage and eliminating the need for separate liquid handling apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the liquid transfer-type method is used in automated liquid handling systems, then automation level is improved, but reaction time increases due to dispensing and removing solutions
Solution Approach 1:
Instead of transferring liquid solutions between vessels (conventional approach), the patent inverts the approach by transferring magnetic beads while keeping the reaction vessels stationary. The magnetic rod assembly moves to different vessels to collect and transfer beads, eliminating the need for repeated liquid dispensing and removal operations that consume time in automated systems.
Solution Approach 2:
The patent extracts the magnetic beads from the liquid solution phase and transfers them separately using a magnetic rod assembly. By separating the bead transfer function from the liquid handling function, the system eliminates time-consuming liquid dispensing steps while maintaining automated operation.
2Loss of time
If the bead transfer-type method is used with pre-filled cartridges, then reaction time is shortened, but reagent cost increases due to waste
Solution Approach 1:
The patent employs a dynamic system where the magnetic rod assembly can be selectively positioned to transfer beads only between vessels that contain samples requiring processing. This dynamic control allows the system to process a variable number of samples without wasting reagents in pre-filled cartridges, as beads are transferred on-demand rather than using fixed pre-filled formats.
3Loss of time
If the bead transfer-type method is implemented, then reaction time is reduced, but additional liquid handling apparatus is required for PCR preparations
Solution Approach 1:
The automated liquid handling system is designed with multi-functionality, integrating both the bead transfer capability (via magnetic rod assembly) and liquid handling capability (via dispensing system) into a single platform. This universal system can perform nucleic acid extraction through bead transfer and subsequently prepare PCR reactions using the same apparatus, eliminating the need for separate dedicated equipment.
4Loss of time
If conventional bead transfer apparatus is used, then reaction time is shortened, but device complexity increases with specialized magnetic rod assembly
Solution Approach 1:
The patent merges the magnetic rod assembly for bead transfer with the existing automated liquid handling system. The magnetic rod assembly is integrated into the automated platform and can be controlled by the same or coordinated control system, combining two functions (bead transfer and liquid handling) into one unified apparatus rather than using separate specialized devices.
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 solution enables automated nucleic acid extraction with reduced reaction times and costs, as it minimizes reagent consumption and integrates PCR preparations within the same apparatus, eliminating the need for additional equipment.
Implementation Method 1
a rod (110) comprising magnetic force-generating material for collecting magnetic beads
Data Source
AI summary
The present invention relates to novel modules for transferring magnetic beads, an automated system comprising the same and a method for extracting nucleic acids using the same. The specifically designed magnet module and cover module of the present invention can be employed in the automated liquid handling apparatus by means of pre-existing moving modules (e.g., pipettor module) of the apparatus. The present invention enables a bead transfer-type method for extracting nucleic acids to be performed in an automated manner on the automated liquid handling apparatus. The present invention provides advantages of higher level of automation, more reduced cost and no need for another separate liquid handling apparatus compared to the conventional bead transfer-type method usually performed in the small apparatus designed to be used only for this bead transfer-type method. Also, the present method has the merits of more shortened reaction time compared to the conventional liquid transfer-type method.