meso-Methylhydroxy BODIPY: a scaffold for photo-labile protecting groups

Area of Science:

• Organic Chemistry
• Photochemistry
• Chemical Biology

Background:

• Boron dipyrromethene (BODIPY) dyes are widely used fluorescent probes.
• Developing efficient and photolabile caging groups is crucial for spatiotemporal control in chemical biology.
• Existing caging strategies often require UV light, limiting their biological applications.

Purpose of the Study:

• To develop a novel green light-removable caging group based on the BODIPY scaffold.
• To demonstrate the utility of this caging group for controlling chemical functionalities.
• To showcase green light-mediated control over biological processes in cellular systems.

Main Methods:

• Synthesis of a modified BODIPY scaffold incorporating a meso-methylhydroxy moiety.
• Photochemical characterization of the caging and uncaging kinetics under green light irradiation.
• Application of the caging group to mask and release biologically relevant molecules.
• Demonstration of green light-induced uncaging in cultured cell lines and primary neurons.

Main Results:

• The meso-methylhydroxy BODIPY moiety functions as an efficient photolabile caging group.
• The caging group is readily removable upon irradiation with green light (e.g., 520 nm).
• Successful caging and subsequent uncaging of various chemical functionalities were achieved.
• Green light-mediated uncaging demonstrated control over biological processes in neuronal and cell cultures.

Conclusions:

• The developed BODIPY-based caging group offers a valuable tool for spatiotemporal control using green light.
• This approach provides a non-invasive method for manipulating biological processes with high spatial and temporal precision.
• The findings open new avenues for photopharmacology and advanced cellular imaging techniques.