Nanoporous Substrates for Low Molecular Weight Biomarker Enrichment
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Solution Overview
Problem
Current analytical techniques for clinical samples, such as blood serum, face challenges in resolving interference from highly abundant substances like albumin, which hinders the analysis of other substances of interest, necessitating the development of more effective methods for sample analysis.
Innovation Solution
The use of nanoporous materials, such as silica or silicon substrates with specific pore sizes and surface modifications, to selectively retain or deplete certain components from biological samples, allowing for enhanced analysis of low molecular weight molecules and biomarkers by mass spectrometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional analytical techniques are used to analyze clinical samples, then the analysis can be performed with standard methods, but highly abundant substances like albumin interfere with the detection of low molecular weight biomarkers
Solution Approach 1:
The patent employs nanoporous substrates with specifically engineered pore sizes (ranging from nanometers to micrometers) that enable size-based fractionation of proteins in clinical samples. The porous structure physically separates low molecular weight biomarkers from high molecular weight abundant proteins, allowing selective retention and detection of target analytes while excluding interfering substances through the pore size cutoff mechanism
Solution Approach 2:
The invention extracts and removes highly abundant interfering proteins from the sample matrix by utilizing the nanoporous substrate's selective retention capability. The substrate captures and holds abundant proteins within its porous structure, effectively depleting them from the sample and eliminating their interference with subsequent biomarker detection
2Object-affected harmful factors
If antibodies are used to capture highly abundant material to reduce interference, then interference from abundant substances is reduced, but the system becomes more complex and requires additional reagents
Solution Approach 1:
The patent replaces expensive and complex antibody-based depletion systems with inexpensive, disposable nanoporous substrates that can be manufactured at low cost and used in a single-use or limited-use manner. These substrates provide the same interference reduction function without requiring additional reagents or complex preparation protocols
Solution Approach 2:
The invention changes the physical parameter of pore size in the substrate to achieve selective protein retention based on molecular dimensions. By adjusting the pore size parameter, the substrate can be optimized to retain specific size ranges of proteins, providing a simple physical separation mechanism that eliminates the need for biological reagents
3Measurement precision
If nanoporous materials are used to selectively retain components, then low molecular weight biomarkers are enriched and detected with higher sensitivity, but the substrate requires specific pore size control and surface modifications
Solution Approach 1:
The patent utilizes nanoporous substrates with controlled pore sizes to achieve size-based fractionation and enrichment of low molecular weight biomarkers. The porous structure provides a physical cutoff that retains small biomarker molecules while allowing larger proteins to pass through, thereby enriching the concentration of target analytes for enhanced detection sensitivity
Solution Approach 2:
The invention applies specific surface modifications to localized regions of the nanoporous substrate to enhance selective retention of target biomarkers. By modifying the surface properties (such as charge, hydrophobicity, or affinity) in specific areas, the substrate can selectively interact with and retain particular classes of molecules while maintaining the overall size-based separation function
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 the selective enrichment and detection of low molecular weight biomarkers, improving the sensitivity of mass spectrometry analysis and reducing interference from abundant proteins, thereby facilitating the detection of disease markers in clinical samples.
Implementation Method 1
nanoporous material retains the first component and does not retain the second component
Implementation Method 2
selective enrichment and detection of low molecular weight biomarkers
Data Source
AI summary
Nanoporous materials can be used to enrich samples for subsequent analysis of substances contained in the sample. The method is shown to enrich the yield of species in the low molecular weight proteome, allowing detection of small peptides in the low nanomolar range.