Combination of small molecule microarray and confocal microscopy techniques for live cell staining fluorescent dye...

Area of Science:

• Chemical Biology
• Microscopy
• Drug Discovery

Background:

• High-throughput screening (HTS) methods accelerate the discovery of novel fluorochromes.
• Developing new fluorescent dyes is crucial for advanced biological imaging and diagnostics.

Purpose of the Study:

• To develop and apply a combined small molecule microarray (SMM) prescreening and confocal laser scanning microscopy (CLSM) approach for discovering novel cell-staining fluorescent dyes.
• To identify novel, compartment-specific, cell-permeable fluorochromes with low cytotoxicity.

Main Methods:

• A library of 14,585 compounds was prescreened using SMM to identify those with high native fluorescence.
• Promising compounds were further tested on living cells using CLSM for cell permeability and compartment specificity.
• Cytotoxicity assays were performed to evaluate the safety of identified fluorochromes.

Main Results:

• Eleven novel fluorochromes were identified with cell-specific staining properties.
• The identified dyes demonstrated cell permeability or targeted the plasma membrane.
• The fluorochromes exhibited no significant toxicity at concentrations between 1-10 micromolar, even with long-term incubation.

Conclusions:

• The combined SMM and CLSM approach is effective for discovering novel, functional fluorochromes.
• The identified fluorochromes are suitable for cell staining applications due to their specificity and low toxicity.
• These new dyes represent valuable tools for advanced biological research and imaging.