Visualising and understanding cGMP signals in the cardiovascular system

Area of Science:

• Cellular and Molecular Physiology
• Pharmacology
• Biomedical Imaging

Background:

• Cyclic guanosine monophosphate (cGMP) is a critical intracellular signaling molecule involved in numerous physiological and pathological processes.
• Fluorescent cGMP biosensors offer a powerful method for sensitive, real-time analysis of cGMP dynamics at the single-cell level.

Purpose of the Study:

• To review the role of cGMP in human physiology and disease.
• To summarize advances in understanding cGMP signaling and drug action using cGMP imaging.
• To highlight the application of cGMP biosensors in cardiovascular research.

Main Methods:

• Utilized fluorescent cGMP biosensors for single-cell imaging.
• Analyzed endogenous cGMP signaling pathways.
• Focused on cGMP dynamics in the cardiovascular system.

Main Results:

• cGMP imaging has uncovered novel aspects of cGMP signaling, including local, intercellular, and mechanosensitive signals.
• Single-cell imaging demonstrates the heterogeneity of cGMP signals within cell populations.
• Provided new insights into drug actions on cGMP pathways.

Conclusions:

• Fluorescent cGMP biosensors are invaluable tools for dissecting complex cGMP signaling networks.
• Single-cell cGMP imaging offers critical information on signal heterogeneity and drug efficacy.
• Future directions include in vivo imaging and simultaneous monitoring of multiple signaling molecules.