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Endoplasmic Reticulum-Targeted Two-Photon Fluorescent Probe for the Detection of Nitroxyl in a Parkinson's Disease
1Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photo-electronic/Electro Photonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China.
Nitroxyl (HNO) is elevated in Parkinson's disease (PD) brain models. A new probe, KD-HNO, detects increased HNO during ER stress, aiding PD research and early diagnosis.
Area of Science:
- Neuroscience
- Biochemistry
- Medical Diagnostics
Background:
- Nitroxyl (HNO) and endoplasmic reticulum (ER) stress are implicated in Parkinson's disease (PD) pathogenesis.
- The precise relationship between HNO neurotoxicity and ER stress in PD remains unclear.
- Sensitive *in vivo* tools are needed for HNO detection to understand PD progression and enable early diagnosis.
Purpose of the Study:
- To develop a sensitive fluorescent probe for HNO detection.
- To investigate the role of HNO in ER stress-induced cellular models of PD.
- To explore the correlation between HNO levels and PD in animal models.
Main Methods:
- Development of a two-photon fluorescent probe (KD-HNO) with high selectivity and sensitivity for HNO.
- Application of KD-HNO to detect HNO levels in tunicamycin-stimulated PC12 cells exhibiting ER stress and PD features.
- Measurement of HNO levels in the brains of PD-model mice using the KD-HNO probe.
Main Results:
- The KD-HNO probe demonstrated high sensitivity (7.93 nM) and selectivity for HNO.
- HNO levels were significantly increased in PC12 cells undergoing ER stress.
- A notable increase in brain HNO levels was observed in PD-model mice, establishing a positive correlation with PD.
Conclusions:
- The KD-HNO probe is a valuable tool for studying HNO's biological roles in PD.
- Findings suggest a link between elevated HNO levels and PD pathology.
- The KD-HNO probe shows potential for the early diagnosis of Parkinson's disease.
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