Magnetic Substrate Prion Immobilization

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Solution Overview

Problem

Prion diseases are challenging to control due to the resistance of infectious prions to environmental degradation and their potential for transmission through various routes, and the mechanism of prion protein misfolding into infectious isoforms remains unknown, hindering effective detection and analysis methods.

Innovation Solution

A method involving the non-covalent immobilization of infectious prion proteins using magnetic substrates, such as silanized iron oxide microparticles, nanoparticles, or nanopowders, which selectively bind the infectious prion protein conformer without the need for cross-linking agents, facilitating analysis and potential treatment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional covalent immobilization methods are used, then stable binding is achieved, but the complexity of the system increases due to cross-linking agents and chemical modifications

Engineering Contradiction:

Improvebinding stabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces covalent chemical bonding mechanisms with magnetic field-based physical interaction. Magnetic substrates utilize magnetic field forces to bind prion proteins, eliminating the need for cross-linking agents and chemical modifications, thus reducing system complexity while maintaining binding stability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces magnetic substrates as intermediary elements between the prion proteins and the detection/analysis system. These substrates provide a stable platform for immobilization through magnetic interactions, simplifying the overall system by avoiding direct covalent modification of the prion proteins themselves

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If magnetic substrates are used for non-covalent immobilization, then system complexity is reduced, but binding strength may be insufficient for certain applications

Engineering Contradiction:

Improvesystem complexityVSAvoidbinding strength

Core Design Contradiction:

Device complexityVSStrength

Solution Approach 1:

The patent optimizes magnetic field parameters including substrate composition (iron oxide, magnetite), particle size, surface area, and magnetic field strength to enhance binding capacity. By adjusting these parameters, the system achieves sufficient binding strength for prion protein immobilization while maintaining the simplicity of non-covalent interaction

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite magnetic substrate materials combining iron oxide nanoparticles with appropriate surface coatings and support structures. This composite approach enhances both the magnetic binding strength and the stability of prion protein immobilization, overcoming the limitations of simple magnetic materials

Inventive Principle:

Principle #40Composite materials

3Measurement precision

If selective binding of infectious prion conformers is achieved, then detection precision is improved, but the difficulty of detecting and measuring increases due to the subtle conformational differences

Engineering Contradiction:

Improvedetection precisionVSAvoiddetection difficulty

Core Design Contradiction:

Measurement precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The patent replaces complex biochemical detection methods with magnetic field-based separation and immobilization. By using magnetic substrates to selectively bind prion proteins based on their conformational properties, the system simplifies detection while improving precision through physical rather than chemical measurement approaches

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts and isolates infectious prion proteins from complex biological samples using magnetic substrates. This extraction process concentrates the target proteins and eliminates interfering substances, making subsequent detection and measurement more precise and less difficult

Inventive Principle:

Principle #2Taking out (Extraction)

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 method allows for the efficient and selective immobilization of infectious prion proteins, enabling effective detection and analysis, such as through Protein Misfolding Cyclic Amplification (PMCA), and offers potential applications in diagnostics and treatment by removing infectious prions from samples.

Implementation Method 1

contacting the infectious prion protein, e.g., in a biological sample, with a magnetic substrate

Methodology Applied

Scientific EffectMagnetic binding: Magnetism

Implementation Method 2

immobilization is non-covalent and is carried out in the absence of a cross-linking agent

Methodology Applied

Scientific EffectNon-covalent interaction: Van der Waals Force

Data Source

PatentUS8889836B2Method for non-covalent immobilization of infectious prion protein

Publication Date: 2014.11.18 TRUSTEES OF DARTMOUTH COLLEGE THE

AI summary

The present invention is method for non-covalently immobilizing an infectious prion protein using a magnetic substrate.