In Vitro Inflammatory Response Test for Glucose Polymer Contaminants
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Solution Overview
Problem
Current methods for producing glucose polymers for peritoneal dialysis are inadequate in terms of implementation, yield, and quality, and fail to effectively detect microbial contaminants and pro-inflammatory substances, leading to risks of peritonitis and aseptic inflammatory episodes.
Innovation Solution
A method involving an in vitro inflammatory response test using cell lines expressing Toll-Like Receptors (TLRs) and NOD-like receptors to detect pro-inflammatory contaminants like LPS and PGN, which are difficult to detect due to their low concentrations and synergistic effects, by measuring cytokine production and receptor activity, allowing for the identification of contaminants and their nature in glucose polymer preparations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard detection methods are used for contaminants in glucose polymers, then the detection process is simple and quick, but the detection sensitivity is insufficient and cannot detect contaminants below certain concentration thresholds
Solution Approach 1:
The patent introduces cell lines (such as HEK-Blue cells) as intermediary biological sensors that express specific receptors (TLR2, TLR4, NOD2) on their surface. These cell lines act as mediators between the contaminants and the detection system, amplifying the detection signal through cellular responses (color change, cytokine production) that can be measured with high sensitivity using standard plate readers, thus achieving high detection sensitivity without requiring complex specialized equipment
Solution Approach 2:
The patent replaces traditional mechanical/chemical detection methods with a biological detection system. Instead of using complex instrumental analysis or chemical assays to detect contaminants, the invention uses living cells with expressed receptors that naturally recognize and respond to contaminants, substituting a biological system for a mechanical/chemical one and enabling detection at lower concentrations through cellular amplification mechanisms
2Productivity
If conventional production methods are used for glucose polymers, then the production process is simple and fast, but the yield and quality are inadequate, and contamination risks are high
Solution Approach 1:
The patent implements preliminary detection of contaminants at the production stage using the developed ELISA-based assay with receptor-expressing cell lines. By detecting contaminants (LPS, PGN, β-glucans) early in the production process rather than only in finished products, the system allows for immediate corrective actions to be taken, preventing contaminated batches from proceeding further and ensuring higher overall product quality and safety while maintaining production efficiency
Solution Approach 2:
The patent establishes a feedback mechanism where the detection results from the ELISA assay with receptor-expressing cell lines are used to control the production process. The quantitative measurement of contaminant levels provides feedback that can trigger automatic rejection of contaminated batches or alert operators to adjust production parameters, creating a closed-loop system that continuously improves product quality while maintaining productivity through data-driven decision-making
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 method enables sensitive and reproducible detection of microbial contaminants below the threshold of standard tests, allowing for the retention or rejection of batches based on contamination levels, thereby reducing the risk of inflammatory reactions and improving the safety of peritoneal dialysis solutions.
Implementation Method 1
A method involving an in vitro inflammatory response test using cell lines expressing Toll-Like Receptors (TLRs) and NOD-like receptors to detect pro-inflammatory contaminants like LPS and PGN
Implementation Method 2
by measuring cytokine production and receptor activity, allowing for the identification of contaminants and their nature in glucose polymer preparations
Data Source
AI summary
The invention relates to a method for detecting contaminants of glucose polymers, said contaminants being capable of acting in synergy with one another so as to trigger an inflammatory reaction, characterized in that it comprises an in vitro inflammatory response test using modified cell lines.