A highly sensitive fluorescent probe based on simple pyrazoline for Zn2+ in living neuron cells

Area of Science:

• Chemical Biology
• Biomedical Engineering
• Analytical Chemistry

Background:

• Zinc ions (Zn2+) play critical roles in numerous biological processes.
• Accurate detection of intracellular Zn2+ is essential for understanding cellular function and disease.
• Existing detection methods often lack selectivity or require complex procedures.

Purpose of the Study:

• To develop a novel pyrazoline-based fluorescent sensor for selective and sensitive detection of Zn2+.
• To evaluate the sensor's performance in biological samples, including living cells.
• To demonstrate the utility of the sensor for imaging intracellular Zn2+ in neurons.

Main Methods:

• Synthesis of a pyrazoline-based fluorescent molecule.
• Spectroscopic analysis to determine binding affinity and selectivity for Zn2+.
• Cell-based assays using living neuron cells to assess probe permeability and intracellular Zn2+ detection.

Main Results:

• The developed sensor exhibited excellent binding selectivity for Zn2+ over other metal ions.
• A significant 40-fold fluorescence enhancement was observed upon Zn2+ binding.
• The probe demonstrated good cell permeability and successfully detected intracellular Zn2+ in living neuron cells.

Conclusions:

• The pyrazoline-based sensor provides a sensitive and selective tool for biological Zn2+ detection.
• The cell-permeable nature of the probe allows for real-time imaging of intracellular zinc dynamics.
• This sensor has potential applications in neuroscience and the study of zinc-related diseases.