Guided Magnetic Nanostructures for Low-Toxicity Intracellular Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for high-throughput and targeted intracellular delivery of biomolecules are inefficient, costly, or toxic, and face challenges in releasing modified cells from nanostructured substrates for further study, while nano-/micromotor systems lack precision and biocompatibility due to catalytic reactions.
Innovation Solution
Magnetic nanostructures, such as nanospears, nanostars, and nanorods, are designed to carry biomolecular cargo and are guided by external magnetic fields for precise intracellular delivery, using biocompatible materials and coatings to penetrate cell membranes without chemical propellants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If viruses or chemical reagents are used for intracellular delivery, then delivery efficiency is improved, but cell toxicity and cost increase
Solution Approach 1:
The patent replaces chemical and biological delivery systems (viruses, chemical reagents) with a magnetic field-controlled mechanical system. Magnetic nanostructures are guided by external magnetic fields to physically penetrate cell membranes and deliver cargo, eliminating the need for toxic chemical transfection reagents or viral vectors while maintaining high delivery efficiency.
Solution Approach 2:
The patent introduces magnetic fields as an intermediary control mechanism. The magnetic field acts as a non-invasive mediator that guides magnetic nanostructures to target cells, enabling precise spatial and temporal control of delivery without direct chemical interaction with cells, thereby reducing toxicity.
2Productivity
If nanostructured substrates are used for cell transfection, then delivery efficiency is improved, but cell release and collection become difficult
Solution Approach 1:
The patent separates the delivery function from the substrate by using free-floating magnetic nanostructures in solution rather than cells grown on fixed nanostructured substrates. This segmentation allows cells to remain in suspension and be easily collected after transfection, while the magnetic nanostructures can be removed by magnetic separation.
Solution Approach 2:
The patent uses magnetic fields as an intermediary to control the nanostructures without requiring physical substrate attachment. The magnetic field mediates the interaction between nanostructures and cells, enabling delivery while keeping both components separable and recoverable.
3Adaptability or versatility
If nano-/micromotor systems are used for targeted delivery, then active transport capability is improved, but precision and biocompatibility deteriorate due to catalytic reactions
Solution Approach 1:
The patent replaces catalytic chemical reactions (which propel nano-/micromotors) with magnetic field-driven mechanical motion. External magnetic fields provide precise control over the motion of magnetic nanostructures, eliminating the imprecision and byproduct generation associated with catalytic propulsion while maintaining active transport capability.
4Reliability
If conventional transfection methods are used, then delivery capability is achieved, but cost and time efficiency worsen
Solution Approach 1:
The patent enables continuous and rapid transfection by using magnetic fields to continuously guide and concentrate magnetic nanostructures onto target cells until delivery is complete. This eliminates the long incubation times required by conventional methods, as the magnetic field actively drives the delivery process rather than relying on passive diffusion or cellular uptake over extended periods.
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 magnetic nanostructures enable efficient, safe, and scalable delivery of biomolecules into cells with high viability and minimal metabolic impact, suitable for both molecular biology studies and translational medicine.
Implementation Method 1
applying an external magnetic field to move the magnetic nanostructures into physical contact with at least some of the cells
Implementation Method 2
The magnetic nanostructures move into physical contact with a single cell, a subset of cells
Data Source
AI summary
A method of transporting biomolecular cargo intracellularly into cells includes the operations of providing magnetic nanostructures (e.g., nanospears, nanostars, nanorods, and other nanometer-sized structures) carrying the biomolecular cargo thereon and applying an external magnetic field to move the magnetic nanostructures into physical contact with at least some of the cells (or the cells into the magnetic nanostructures). The magnetic nanostructures move into physical contact with a single cell, a subset of cells, or all cells. The external magnetic field may be applied by a moving permanent magnet although an electromagnetic may also be used. The biomolecular cargo may include a molecule, a plurality of molecules, or higher order biological constructs. For example, the biological construct may include DNA plasmids, small interfering RNA, proteins, or targeted nuclease gene-editing cargo such as zinc-finger nucleases, transcription activator-like effector nucleases, Cas9 protein, Cas9 mRNA, and associated guide RNA sequences.