Acoustic Microfluidic Cell Separation with Additive Pretreatment
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Solution Overview
Problem
Current cell separation technologies, such as centrifugation and magnetic separation, are inadequate for selectively separating leukocyte subclasses like T cells from B cells due to limitations in size and density separation, and often require foreign particles or complex procedures that are not scalable or safe for therapeutic use.
Innovation Solution
A method and system utilizing acoustic energy in microfluidic separation channels, where biofluids are pretreated with additives to alter cell properties, allowing for the selective separation of target cells like leukocytes from non-target cells based on size, density, and aggregation potential, without the need for affinity-based capture particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centrifugation or magnetic separation is used to separate cells, then separation can be achieved, but foreign particles or complex procedures are required which are not scalable or safe for therapeutic use
Solution Approach 1:
The patent replaces mechanical separation methods (centrifugation) and magnetic separation with acoustic field-based separation. Acoustic waves generate acoustic radiation forces that act on cells based on their physical properties (compressibility, density, size) without requiring foreign particles or complex mechanical procedures, making the method safer and more scalable for therapeutic applications.
Solution Approach 2:
The patent introduces an acoustic field as an intermediary between the separation target (cells) and the separation outcome. The acoustic field mediates the separation process by generating forces that selectively move different cell types based on their physical properties, eliminating the need for direct mechanical or magnetic interactions that require foreign particles.
2Productivity
If centrifugation or magnetic separation is used, then cell separation can be achieved, but the methods are not scalable
Solution Approach 1:
The patent replaces complex mechanical and magnetic separation systems with an acoustic field-based system that is inherently more scalable. Acoustic waves can be generated and controlled in continuous flow systems, allowing for scalable production without the complexity and limitations of mechanical centrifugation or magnetic separation equipment.
3Device complexity
If acoustic energy is applied to separate cells, then foreign particles are eliminated, but cell properties must be altered through pretreatment
Solution Approach 1:
The patent applies preliminary action by pretreating cells with agents that modify their physical properties (size, compressibility, aggregation potential) before acoustic separation. This pretreatment enhances the acoustic responsiveness of target cells, allowing for more effective separation without requiring foreign particles during the actual separation process.
Solution Approach 2:
The patent changes physical parameters of cells through pretreatment (size, compressibility, aggregation potential) to optimize their response to acoustic fields. By modifying these parameters, the separation efficiency is improved while eliminating the need for foreign particles, balancing the trade-off between pretreatment complexity and elimination of foreign materials.
4Manufacturing precision
If acoustic energy is used for separation, then continuous high-purity separation is enabled, but energy consumption increases
Solution Approach 1:
The patent replaces high-energy mechanical separation methods with acoustic field-based separation. While acoustic energy is consumed, it is generally more efficient and requires less energy than mechanical centrifugation or magnetic separation systems, especially when scaled to continuous flow operations. The acoustic radiation forces provide precise control over cell separation, achieving high purity with reasonable energy input.
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
Enables continuous, high-purity separation of specific cell types, such as lymphocytes and platelets, with improved efficiency and scalability, reducing the reliance on foreign particles and complex procedures, and enhancing the effectiveness of cell therapies like CAR-T treatment.
Implementation Method 1
applying acoustic energy to the microfluidic separation channel to accumulate target cells within a primary stream along the separation channel and accumulate non-target cells within a secondary stream along the separation channel
Implementation Method 2
the acoustic energy may be applied transverse to a direction of the fluid flow through the separation channel
Data Source
AI summary
A method for separating cells in a biofluid includes pretreating the biofluid by introducing an additive comprising a cell activator, flowing the pretreated biofluid through a microfluidic separation channel, and applying acoustic energy to the microfluidic separation channel to accumulate target cells in a primary stream and non-target cells in a secondary stream. A system for microfluidic cell separation capable of separating target cells from non-target cells in a biofluid includes at least one microfluidic separation channel, a source of biofluid, a source of additive comprising a cell activator, and at least one acoustic transducer coupled to the microfluidic separation channel.