Intracellular FRET-based probes: a review

Area of Science:

• Biophysics
• Cell Biology
• Nanotechnology

Background:

• Förster resonance energy transfer (FRET) probes are valuable tools for intracellular studies due to their sensitivity, robustness, and low background noise.
• The distance-dependent nature of FRET enables probing of nanoscale environments beyond the diffraction limit of light.
• Recent advancements in biofunctionalization and imaging technologies have significantly enhanced the utility of FRET probes in live-cell research.

Purpose of the Study:

• To provide an overview of engineered intracellular FRET probes.
• To highlight the diversity of FRET probe designs and their applications within the cell.
• To showcase the capabilities of FRET-based technologies for intracellular investigations.

Main Methods:

• Review of recent literature on intracellular FRET probe development.
• Analysis of FRET probe engineering strategies, including biofunctionalization and optical imaging techniques.
• Categorization of FRET probes based on their design principles and target intracellular analytes or processes.

Main Results:

• Demonstration of FRET probes' ability to measure various intracellular parameters with high sensitivity and specificity.
• Illustration of diverse FRET probe applications, including monitoring enzyme activity, ion concentrations, and molecular interactions.
• Showcasing the successful integration of FRET probes with advanced imaging modalities for real-time intracellular analysis.

Conclusions:

• Intracellular FRET probes represent a powerful and versatile technology for dissecting complex cellular mechanisms.
• Continued innovation in FRET probe design and bioimaging will further expand their impact on cell biology and disease research.
• FRET-based approaches are at the forefront of intracellular studies, offering unique insights into biological processes at the nanoscale.