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Real-Time Monitoring of Tyrosine Hydroxylase Activity with a Ratiometric Fluorescent Probe
Jia-Yi Yao1, Lu Li2, Ji-Xuan Xu2
1Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China.
Analytical Chemistry
|April 23, 2024
Summary
A new fluorescent probe, TH-1, enables specific detection and visualization of tyrosine hydroxylase (TH) activity. This offers a potential tool for real-time monitoring and early diagnosis of Parkinson's disease (PD) in complex biological systems.
Area of Science:
- Biochemistry
- Neuroscience
- Chemical Biology
Background:
- Parkinson's disease (PD) is a prevalent neurodegenerative disorder requiring early diagnosis.
- Tyrosine hydroxylase (TH) is a key enzyme in dopamine synthesis, making its activity a crucial indicator for PD.
- Current methods lack specific fluorescent probes for real-time TH monitoring.
Purpose of the Study:
- To develop and validate a novel ratiometric fluorescent probe for detecting TH activity.
- To assess the probe's efficacy in cellular and in vivo models of PD.
Main Methods:
- Design and synthesis of three wash-free ratiometric fluorescent probes.
- Evaluation of photophysical properties and specificity of the probes.
- Application of the probe (TH-1) for bioimaging TH activity in nerve cells, zebrafish brains, and mouse brain slices.
Main Results:
- The developed probe TH-1 demonstrated ideal photophysical properties.
- TH-1 enabled specific dual-channel bioimaging of TH activity in SH-SY5Y nerve cells.
- In vivo imaging of TH activity was achieved in zebrafish brains and mouse striatal slices.
Conclusions:
- The ratiometric fluorescent probe TH-1 is a potential tool for real-time monitoring of PD.
- TH-1 facilitates the visualization of TH activity in complex biosystems.
- This probe could aid in the early diagnosis and progression assessment of Parkinson's disease.
