Organic Polymer Magnetic Particles for High-Sensitivity Biological Detection
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Solution Overview
Problem
Current diagnostic agents using magnetic particles face insufficient sensitivity in detecting biological substances due to the loss of primary probe activity after bonding, primarily because of conformation changes in proteins, and existing methods to maintain activity are either ineffective or costly and complex.
Innovation Solution
Development of organic polymer particles with a carboxyl group derived from scarcely water-soluble carboxylic acid monomers, such as 2-(meth)acryloyloxyethyl succinate and 2-(meth)acryloyloxyethyl phthalate, which form a polymer layer that allows high sensitivity bonding with biological substances like antibodies or antigens, using a process that includes polymerization and activation with water-soluble carbodiimides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods (polyhydric alcohol or hybrid protein) are used to bond primary probes to magnetic particles, then probe bonding is achieved, but the activity of the primary probe is insufficient or the production process becomes complicated and high-cost
Solution Approach 1:
The invention changes the chemical parameters of the polymer particles by incorporating specific carboxyl-containing functional groups (such as carboxymethyl groups) into the polymer structure. This chemical modification enables direct chemical bonding of primary probes to the particle surface, replacing complex hybrid protein methods and achieving both high probe activity and simplified production.
Solution Approach 2:
The invention creates composite magnetic particles consisting of magnetic core materials combined with polymer shells containing specific carboxyl functional groups. This composite structure integrates the magnetic properties needed for particle manipulation with the chemical bonding capabilities required for high-activity probe attachment, eliminating the need for separate hybrid protein layers.
2Measurement precision
If primary probes are bonded to particles, then diagnostic function is achieved, but sensitivity is insufficient due to conformation changes in the protein
Solution Approach 1:
The invention modifies the chemical environment at the particle surface by introducing specific carboxyl-containing functional groups that create optimal bonding conditions. This chemical parameter change allows for gentle, specific chemical bonding that maintains protein conformation and activity, thereby preserving detection sensitivity while achieving functional bonding.
Solution Approach 2:
The carboxyl-containing polymer groups act as intermediary bonding sites between the magnetic particles and the primary probes. These intermediary groups facilitate specific chemical bonding (through carbodiimide chemistry) that preserves the conformation and activity of the protein probes, enabling high-sensitivity detection.
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 organic polymer particles exhibit high sensitivity and maintain primary probe activity, enhancing the detection capability of diagnostic agents by chemically bonding with proteins, thereby improving the detection sensitivity of biological substances.
Implementation Method 1
organic polymer particles that can chemically bond to biological-related substances, including proteins such as an antibody or an antigen, by utilizing a carboxyl group
Implementation Method 2
a process that includes polymerization and activation with water-soluble carbodiimides
Data Source
AI summary
Organic polymer particles having a structure shown by the following formula (1) are disclosed.wherein A represents an alkylidene group, an alkylene group, a cyclohexylene group, or a phenylene group, and B represents a linear or branched alkylene group or an alkylidene group having 1 to 6 carbon atoms.