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Design to Implementation Study for Development and Patient Validation of Paper-Based Toehold Switch Diagnostics

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Engineering Protein Switches for Rapid Diagnostic Tests.

Hope Adamson¹, Lars J C Jeuken¹

¹School of Biomedical Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom.

|October 14, 2020

Summary

Engineered protein switches offer potential for rapid, wash-free diagnostic tests. Overcoming design and implementation challenges is key to realizing their widespread use in point-of-need diagnostics.

Keywords:

biosensors homogeneous assay immunoassay point-of-care protein engineering protein switch rapid diagnostics wash-free

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Area of Science:

Biotechnology
Molecular Biology
Assay Development

Background:

Biological signaling relies on protein switches responding to molecular cues.
Engineered protein switches transduce analyte binding into quantitative signals for homogeneous assays.
These switches hold promise for point-of-need diagnostics, improving speed and accessibility over lab assays.

Purpose of the Study:

To review opportunities and challenges in engineering protein switches for rapid diagnostic tests.
To evaluate the relationship between protein switch design (recognition element, reporter, switching mechanism) and assay performance.
To identify areas for improvement to guide future optimization of protein switch technology.

Main Methods:

Review of current literature on engineered protein switches.
Analysis of protein switch design principles and their impact on performance.
Discussion of translational challenges for practical implementation in diagnostics.

Main Results:

Protein switch assays offer a simple, wash-free, homogeneous format with potential for rapid diagnostics.
Design elements like recognition, reporter, and switching mechanisms critically influence performance.
Modular switches facilitate targeting new analytes without complete redesign, enhancing development efficiency.

Conclusions:

Engineered protein switches present a promising platform for point-of-need diagnostics.
Addressing design and translational barriers is essential for routine clinical adoption.
Further optimization and integration into user-friendly devices are crucial for realizing diagnostic potential.