Red Blood Cell Detection Using Antigen-Binding Agents
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Solution Overview
Problem
Current methods for detecting red blood cells in miniaturized assays rely heavily on visual identification, which is unreliable for diverse antigen profiles and cannot consistently detect all red blood cell types, especially in systems where visual detection is not feasible.
Innovation Solution
The method involves using binding agents that target specific red blood cell antigens such as Ena, Ge:2, Ge:3, GPA, GPB, H, Rh29, and Wrb, which are expressed by a majority of red blood cell types, allowing for reliable detection through binding and subsequent identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If visual identification methods are used to detect red blood cells in miniaturized assays, then the detection process is simple and quick, but the reliability of detection deteriorates for diverse antigen profiles and in systems where visual detection is not feasible
Solution Approach 1:
The patent introduces binding agents (antibodies or antibody fragments) as intermediaries that specifically bind to red blood cell antigens. These binding agents serve as mediators between the red blood cells and the detection system, enabling reliable detection through binding events that can be measured by various methods (fluorescence, colorimetry, etc.) rather than direct visual identification.
Solution Approach 2:
The patent replaces the mechanical/visual detection system with a biochemical binding-based detection system. Instead of relying on visual observation of red blood cell morphology or haemagglutination, the system uses specific antigen-antibody binding events that can be detected through biochemical assays, enabling detection in miniaturized formats where visual observation is not feasible.
2Reliability
If binding agents targeting specific antigens are used to detect red blood cells, then detection reliability improves across diverse types, but the complexity of the assay system increases
Solution Approach 1:
The patent employs binding agents that recognize highly conserved red blood cell antigens (such as glycophorin A, glycophorin B, or other ubiquitous RBC surface antigens). These binding agents serve multiple functions: they detect the presence of red blood cells, confirm proper sample addition, and work across diverse red blood cell types with different antigen profiles, thereby reducing the need for multiple specialized reagents.
Solution Approach 2:
The patent changes the detection parameter from visual observation of physical properties (shape, color, haemagglutination) to measurement of biochemical binding events. By utilizing antigens that are consistently expressed across red blood cell types and detecting their binding to specific antibodies, the assay achieves reliable detection while maintaining a relatively simple system architecture.
3Productivity
If miniaturization of assays is implemented, then productivity and efficiency improve, but the ability to visually detect red blood cells is lost
Solution Approach 1:
The patent replaces visual detection mechanisms with biochemical detection mechanisms that are compatible with miniaturized formats. By using binding agents that produce detectable signals (fluorescence, colorimetric changes, etc.) upon binding to red blood cell antigens, the system enables reliable detection in microplate wells, microdroplets, and other miniaturized assay formats where direct visual observation of red blood cells is not feasible.
Solution Approach 2:
The patent utilizes color changes or other optical signal changes resulting from binding agent-red blood cell interactions as the detection mechanism. This allows detection in miniaturized formats where the signal can be read by plate readers, scanners, or other automated detection devices, maintaining productivity while overcoming the loss of direct visual detection capability.
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 approach enables consistent and reliable detection of red blood cells across various types, improving the reliability of control tests in assays and confirming the addition of red blood cells, even in microarray systems where visual detection is impossible.
Implementation Method 1
using binding agents that target specific red blood cell antigens such as Ena, Ge:2, Ge:3, GPA, GPB, H, Rh29, and Wrb, which are expressed by a majority of red blood cell types, allowing for reliable detection through binding and subsequent identification
Data Source
AI summary
The present invention is based on the finding that red blood cell antigens can be exploited as a means to detect red blood cells/erythrocytes. Specifically, by identifying red blood cell antigens which are expressed by substantially all red blood cell types, it is possible to provide a method which achieves the reliable detection of red blood cells.