Arylboronic Acid Stabilization of Hemoglobin in Fecal Samples
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Solution Overview
Problem
Proteins such as hemoglobin in specimens like feces are prone to denaturation, decomposition, or modification due to unfavorable temperature conditions and the presence of bacteria and enzymes, making accurate detection challenging.
Innovation Solution
The method involves causing the protein to coexist with an arylboronic acid, specifically phenylboronic acid or its derivatives, along with a sugar or sugar alcohol, to enhance protein stability. This is achieved by dispersing the protein in a solution containing the arylboronic acid and sugar, with concentrations optimized to prevent protein denaturation and decomposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hemoglobin is added to the preservation solution for detecting fecal occult blood, then the sensitivity of detection is improved, but the hemoglobin is denatured or decomposed under high temperature conditions during transportation
Solution Approach 1:
The patent introduces haptoglobin as an intermediary substance that binds to hemoglobin to form a stable complex. This mediator protects the hemoglobin from denaturation and decomposition during transportation while maintaining its immunological activity for detection. The haptoglobin-hemoglobin complex serves as the stable form that can withstand temperature variations during sample transport.
Solution Approach 2:
The patent creates a composite structure by forming a complex between haptoglobin and hemoglobin. This composite material combines the high sensitivity of hemoglobin with the stability of haptoglobin, resulting in a stable complex that maintains immunological activity while resisting denaturation under unfavorable temperature conditions during transportation.
2Device complexity
If the specimen is preserved without additional stabilizers, then the preservation solution is simple, but the protein is decomposed or modified by bacteria or enzymes contained in the specimen
Solution Approach 1:
Haptoglobin acts as a mediator that protects hemoglobin from decomposition by bacteria and enzymes in the specimen. By forming a stable complex with hemoglobin, it prevents proteolytic degradation and maintains protein integrity during preservation, adding minimal complexity to the preservation solution.
3Reliability
If conventional stabilizers such as antibacterial agents or protease inhibitors are added, then protein decomposition is prevented, but the measurement accuracy is reduced due to interference with immunological reaction
Solution Approach 1:
Haptoglobin serves as a biologically compatible mediator that stabilizes hemoglobin without interfering with immunological detection. Unlike conventional stabilizers such as antibacterial agents or protease inhibitors that may inhibit antibody-antigen reactions, haptoglobin forms a natural complex with hemoglobin that maintains its immunological activity, allowing accurate measurement by immunological methods.
Solution Approach 2:
The patent changes the stabilization mechanism from using conventional chemical stabilizers to using a biological complexing agent (haptoglobin). This parameter change in the stabilization approach eliminates interference with immunological reactions while maintaining protein stability, as the haptoglobin-hemoglobin complex preserves the antigenic determinants necessary for antibody recognition.
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 approach effectively stabilizes proteins like hemoglobin, preventing denaturation and decomposition, thereby allowing for accurate measurement using immunological methods, even under unfavorable conditions.
Implementation Method 1
causing the protein to coexist with an arylboronic acid... effectively stabilizes proteins like hemoglobin, preventing denaturation and decomposition
Implementation Method 2
haptoglobin exists in blood of a wide variety of animals, rapidly binds to hemoglobin, and forms a stable hemoglobin-haptoglobin complex (Hb-Hp complex)
Implementation Method 3
The method involves causing the protein to coexist with an arylboronic acid, specifically phenylboronic acid or its derivatives, along with a sugar or sugar alcohol, to enhance protein stability
Data Source
AI summary
The present invention provides a method for stabilizing proteins, the method including a step for providing proteins contained in a biologically derived sample together with arylboronic acid, wherein the proteins contained in the biologically derived sample are at least one type selected from a group consisting of hemoglobins, haptoglobins, and hemoglobin-haptoglobin complexes. With the present invention, it is possible to stabilize proteins, such as blood proteins or the like, contained in a biologically derived sample. The present invention additionally provides: a stabilizing solution for stabilizing proteins contained in a biologically derived sample; and a method and a kit for detecting proteins contained in a biologically derived sample.