简介：
Overview
This manuscript presents protocols for using genetically encoded nitric oxide (NO•) probes (geNOps) to monitor single-cell NO• fluctuations in real-time via fluorescence microscopy. The study visualizes Ca2+-triggered NO• formation in individual endothelial cells.
Key Study Components
Area of Science
- Neuroscience
- Cell Biology
- Fluorescence Microscopy
Background
- Nitric oxide plays a crucial role in various biological processes.
- Real-time visualization of NO• at the cellular level has been a long-standing goal.
- Genetically encoded probes provide a novel approach for monitoring NO• dynamics.
- High spatial and temporal resolution is achievable with conventional fluorescence microscopy.
Purpose of Study
- To develop protocols for real-time imaging of nitric oxide signals in single cells.
- To utilize geNOps for monitoring NO• generation, diffusion, and degradation.
- To enhance understanding of nitric oxide's role in cellular signaling.
Methods Used
- Preparation of endothelial cell line or HEK293 cells with iron(II) booster solution.
- Use of Fura-2AM for calcium imaging alongside geNOps.
- Fluorescence microscopy to capture real-time data on NO• and calcium signals.
- Stimulation of cells with histamine or ATP to observe NO• response.
Main Results
- Successful visualization of nitric oxide signals in real-time.
- Demonstrated the effects of histamine and ATP on NO• production.
- Established a baseline for fluorescence signals before and after stimulation.
- Showed the responsiveness of geNOps to nitric oxide donors.
Conclusions
- The geNOps technology allows for effective real-time imaging of nitric oxide.
- This method can facilitate further research into nitric oxide signaling in various cell models.
- Future studies may explore the implications of NO• in different physiological contexts.
What are geNOps?
Genetically encoded nitric oxide probes (geNOps) are fluorescent proteins designed to detect nitric oxide levels in cells.
How does the imaging process work?
The imaging process involves using fluorescence microscopy to monitor changes in fluorescence intensity in response to nitric oxide.
What cell types can be used with this protocol?
The protocol is applicable to various cell types, including endothelial cells and HEK293 cells.
What is the significance of real-time monitoring?
Real-time monitoring allows researchers to observe dynamic changes in nitric oxide signaling as they occur within the cell.
Can this technique be adapted for other signaling molecules?
Yes, the principles of this technique can potentially be adapted for monitoring other signaling molecules in cells.
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