A Golgi-localized two-photon probe for imaging zinc ions

Area of Science:

• Biochemistry
• Cell Biology
• Fluorescence Microscopy

Background:

• Zinc ions (Zn2+) play crucial roles in cellular signaling and biological processes.
• Accurate detection and imaging of intracellular Zn2+ are essential for understanding its biological functions.
• Existing methods for Zn2+ detection often face limitations in sensitivity, specificity, or cell permeability.

Purpose of the Study:

• To develop and characterize a novel two-photon fluorescent probe for sensitive and selective detection of Zn2+.
• To investigate the probe's ability to monitor dynamic changes and 3D distribution of Zn2+ in the Golgi apparatus of live cells and tissues.

Main Methods:

• Synthesis and characterization of the two-photon fluorescent probe.
• Evaluation of probe's photophysical properties, including fluorescence enhancement upon Zn2+ binding.
• Assessment of probe's cellular uptake, Golgi localization, cytotoxicity, and photostability.
• Two-photon microscopy imaging of Zn2+ in live cells and tissues.

Main Results:

• The developed probe exhibits a significant fluorescence enhancement in the presence of Zn2+.
• The probe demonstrates excellent cell permeability, specific localization to the Golgi apparatus, low cytotoxicity, and high photostability.
• Real-time two-photon microscopy successfully visualized dynamic changes and 3D distributions of Zn2+ within the Golgi of live cells and tissues.

Conclusions:

• The novel two-photon fluorescent probe is a valuable tool for real-time monitoring of Golgi Zn2+.
• This probe facilitates deeper understanding of the biological roles of zinc in live cellular environments.
• The probe's properties make it suitable for advanced imaging applications in cell biology and neuroscience.