Imaging nuclear, endoplasmic reticulum and plasma membrane events in real time

Area of Science:

• Biophysical Chemistry
• Cellular Biology
• Bioimaging

Background:

• Live cell imaging is crucial for understanding cellular dynamics but limited by current imaging reagents.
• Metal-based complexes present a promising alternative to overcome limitations of conventional imaging agents.
• Existing reagents often suffer from poor photostability, slow uptake, or high cytotoxicity.

Discussion:

• The rhenium (I)-based complex, fac-[Re(CO)3 (1,10-phenanthroline)(4-pyridyltetrazolate)] (ReZolve-ER™), demonstrates significant potential as a live cell imaging agent.
• ReZolve-ER™ exhibits rapid cellular uptake, low cytotoxicity, and resistance to photobleaching, making it suitable for extended imaging periods.
• Its compatibility with multicolour imaging allows for simultaneous observation of multiple cellular processes.

Key Insights:

• ReZolve-ER™ localizes to the nuclear membrane and endoplasmic reticulum (ER), providing specific cellular compartment visualization.
• The agent facilitates the detection of exocytotic events occurring at the plasma membrane in real time.
• This new imaging agent overcomes key limitations of existing technologies for live cell studies.

Outlook:

• ReZolve-ER™ is ideal for monitoring both short- and long-term live cell events.
• Further applications in studying dynamic cellular processes and disease mechanisms are anticipated.
• This development paves the way for more advanced in vivo and in vitro imaging techniques.