Genetic biosensors for imaging nitric oxide in single cells

Area of Science:

• Biochemistry
• Cell Biology
• Molecular Biology

Background:

• Nitric oxide (NO) is a crucial signaling molecule with a short half-life, making its real-time monitoring challenging.
• Sophisticated fluorescent protein-based probes have been developed to specifically detect NO and its metabolites.

Purpose of the Study:

• To review and discuss available genetically encoded fluorescent sensors for NO detection.
• To highlight the applications and functionality of these probes in various cell types and subcellular compartments.

Main Methods:

• Review of existing literature on genetically encoded fluorescent sensors for NO.
• Critical discussion of probe characteristics, functionality, and applicability.
• Analysis of NO detection at single-cell and subcellular levels.

Main Results:

• Genetically encoded fluorescent sensors enable real-time visualization of NO and its byproducts (peroxynitrite, nitrite, nitrate).
• These probes facilitate the study of NO formation, diffusion, and degradation dynamics.
• Current sensors offer insights into NO signaling in individual cells and organelles.

Conclusions:

• Genetically encoded fluorescent sensors are powerful tools for understanding NO biology.
• Further development of NO probes and imaging protocols is needed for enhanced applications.
• These biosensors significantly advance the study of spatiotemporal NO dynamics.