Lateral Flow Device for Brain-Specific Exosome Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current diagnostic methods for traumatic brain injury (TBI) and chronic traumatic encephalopathy (CTE) are inadequate for early detection, being invasive, costly, and unreliable, with existing technologies like MRI and PET scans being inconvenient and insufficient for widespread use.
Innovation Solution
Development of a point-of-care (POC) diagnostic device using a lateral flow assay (LFA) that isolates and detects brain-specific extracellular vesicles, such as exosomes, through specific binding agents like antibodies and lectins, which are stable and sensitive for biomarker detection in biological samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If MRI or PET scans are used for brain injury diagnosis, then diagnostic accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the diagnostic function from complex imaging equipment (MRI/PET) and transfers it to a simple lateral flow device that detects exosomes directly in blood samples. This extraction allows accurate brain injury diagnosis without requiring sophisticated imaging equipment, thereby reducing device complexity while maintaining diagnostic capability.
Solution Approach 2:
The patent introduces exosomes as an intermediary biomarker that bridges the connection between brain injury and detectable signals in blood. By detecting exosomes containing brain-specific proteins (tau, beta-amyloid) in peripheral blood, the system achieves indirect but accurate diagnosis without needing to image the brain directly, simplifying the diagnostic apparatus.
2Measurement precision
If MRI or PET scans are used for brain injury diagnosis, then diagnostic accuracy is improved, but cost increases
Solution Approach 1:
The patent employs disposable lateral flow test strips similar to pregnancy tests, which are inexpensive and single-use. These strips replace costly, reusable imaging equipment like MRI and PET scanners, providing accurate diagnosis at a fraction of the cost while maintaining simplicity and accessibility.
Solution Approach 2:
The diagnostic capability is extracted from expensive imaging equipment and embedded in low-cost lateral flow devices. This extraction enables the same diagnostic function to be performed with minimal equipment investment, dramatically reducing the cost barrier for brain injury detection.
3Measurement precision
If invasive diagnostic procedures are used, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent uses exosomes in peripheral blood as an intermediary that provides information about brain injury without requiring direct brain access. This intermediary approach allows diagnosis through simple blood draws instead of invasive brain procedures, maintaining measurement precision while dramatically improving ease of operation.
Solution Approach 2:
The lateral flow device is designed for self-service operation similar to home pregnancy tests. Users can collect blood samples and perform diagnostics themselves without requiring specialized medical equipment or expertise, making the process accessible to individuals in remote or resource-limited settings.
4Reliability
If early detection methods are implemented, then reliability of treatment is improved, but device complexity increases
Solution Approach 1:
The patent extracts the ability to detect early brain injury markers from complex research laboratories and imaging facilities and places it in simple lateral flow devices. This extraction enables early detection at the point of care, allowing timely intervention with tau-lowering therapies before irreversible damage occurs, while keeping the device simple and accessible.
Solution Approach 2:
Exosomes serve as an intermediary that carries early injury signals (tau, beta-amyloid) from the brain to peripheral blood, where they can be detected by simple devices. This intermediary mechanism enables early detection without requiring complex brain imaging, facilitating timely treatment decisions with straightforward equipment.
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 POC device provides a reliable, inexpensive, and portable means for early detection of TBI and CTE, enabling preventative measures and early treatment opportunities by identifying biomarkers in a minimally invasive manner.
Implementation Method 1
a lectin immobilized to said substrate at a test zone
Implementation Method 2
said sample reservoir comprises an amount of one or more mobilizable labeled antibodies or binding fragments thereof specific for tau, glycosylated tau, phosphorylated tau, β-amyloid, glycosylated β-amyloid, phosphorylated β-amyloid
Implementation Method 3
an absorbent material in fluid communication, such as by capillary flow, with said substrate distal from said sample reservoir
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed are methods, compositions, devices, and kits for the isolation of brain-specific exosomes. Specifically, methods, compositions, devices, and kits comprising an isolated brain-specific extracellular vesicle or exosome joined to a first binding agent that is specific for tau, β-amyloid, S100 β, neuron-specific enolase, glycoprotein A2B5, CD133, NQ01, synaptophysin, neuronal nuclei, MAB1569, polysialic acid-neural cell adhesion molecule (PSA-NCAM), or neurogenic differentiation 1 (NeuroD or Beta2), or glycosylated or phosphorylated forms of these molecules, are provided.