Biosensor Tattoos Using Gene Delivery for Real-Time Biomarker Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for monitoring biomarkers, such as cytokines, are limited by the lack of real-time, precise, and minimally-invasive techniques, with existing assays being time-consuming and prone to interference, and microfluidic systems facing fouling issues, making them unsuitable for continuous monitoring.
Innovation Solution
Development of biosensor tattoos using spatially controlled intracutaneous gene delivery of optical reporters, driven by specific transcription factor response elements, which are delivered via microneedle arrays to transduce skin cells, allowing for real-time monitoring of biomarkers through non-invasive imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional clinical assays (radioimmunoassay, ELISA) are used to directly measure biomarkers, then measurement precision is improved, but loss of time increases significantly
Solution Approach 1:
The patent introduces a preliminary action by pre-transfecting skin cells with reporter genes that are already prepared and positioned in the patient's body. This allows the biosensor to be ready for immediate detection without requiring time-consuming laboratory procedures when biomarker measurement is needed, thus resolving the time-delay issue while maintaining precision through the pre-positioned reporter system
Solution Approach 2:
The patent uses an intermediary approach by introducing reporter genes as mediators between the target biomarker and the detection system. These reporter genes (such as fluorescent proteins) serve as intermediaries that can be detected rapidly through imaging techniques, bypassing the lengthy traditional assay procedures while still providing precise biomarker information through the reporter signal
2Productivity
If microfluidic-based sensor systems are used for continuous monitoring, then productivity is improved, but reliability deteriorates due to fouling and accumulation of biological molecules
Solution Approach 1:
The patent extracts the sensing function from the problematic microfluidic system and relocates it to the patient's own skin cells through gene transfection. By taking out the reporter genes and placing them directly in the body, the system eliminates the need for external microfluidic devices that are prone to fouling, thus maintaining continuous monitoring capability while improving reliability
Solution Approach 2:
The patent implements self-service by using the patient's own skin cells to perform the sensing function. The transfected cells continuously produce reporter proteins that reflect biomarker levels, enabling the body's own cells to serve as the sensor, thereby eliminating the need for external monitoring devices that require maintenance and are susceptible to contamination
3Measurement precision
If invasive blood sampling is used to collect biological samples, then measurement precision is improved, but object-affected harmful factors increase
Solution Approach 1:
The patent replaces the mechanical invasive sampling system with an optical detection system. Instead of physically drawing blood samples, the system uses light-based imaging to detect fluorescent signals from reporter genes in skin cells, thereby eliminating needle punctures and associated health risks while maintaining precision through optical measurement
Solution Approach 2:
The patent utilizes color changes (fluorescence emission) as the detection mechanism. The reporter genes produce fluorescent proteins that emit specific wavelengths of light when excited, allowing precise biomarker detection through non-invasive optical imaging, thus eliminating the need for invasive blood sampling while preserving measurement accuracy
4Measurement precision
If antibody-based assays are used to identify cytokines, then measurement precision is improved, but device complexity increases due to assay interference and secondary drug failure
Solution Approach 1:
The patent extracts the detection target from the complex antibody-antigen interaction system and replaces it with a simpler reporter gene expression system. By taking out the need for antibodies and their associated complications (interference, secondary failures), the system achieves cytokine monitoring through direct reporter signal measurement, reducing complexity while maintaining precision
Solution Approach 2:
The patent uses copying by replacing the direct measurement of complex cytokine molecules with a simplified copy or proxy signal from reporter genes. The reporter gene expression levels copy or reflect the cytokine activity states, providing a simpler readout that avoids the complexities of antibody-based direct detection while preserving the essential information
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
Enables real-time, precise monitoring of biomarkers with minimal health risk, providing a dynamic 2D assay barcode for continuous feedback on physiological states, suitable for chronic monitoring of various conditions and therapies.
Implementation Method 1
delivered via microneedle arrays to transduce skin cells
Implementation Method 2
spatially controlled intracutaneous gene delivery of optical reporters, e.g., fluorescent or colorimetric gene products
Data Source
AI summary
Provided herein are devices and methods used to produce tattoo biosensors that are based on spatially controlled intracutaneous gene delivery of optical reporters driven by specific transcription factor pathways for a given cytokine or other analyte. The biosensors can be specific to a given analyte, or more generically represent the convergence of several cytokines into commonly shared intracellular transcription factor pathways. These biosensors can be delivered as an array in order to monitor multiple cytokines. Biosensor redeployment can enable chronic monitoring from months to years. The tattooed biosensor array of the present invention includes endogenous reporter cells, naturally tuned to each patient's own biology and can be used to reliably measure the state of a patient in real-time.