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Published on: October 12, 2017
A malondialdehyde-activated fluorescent probe reveals lysosomal dysfunction in atherosclerosis
Xia Zhang1, Guocheng Li1, Yanhua Li1
1College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University Jinan 250014 P. R. China liyanhua@sdnu.edu.cn lina@sdnu.edu.cn panwei@sdnu.edu.cn.
Researchers developed a new fluorescent probe to detect malondialdehyde, a marker of oxidative stress, within cell lysosomes. This tool aids in monitoring atherosclerosis progression and enables earlier diagnosis by assessing lysosomal dysfunction.
Area of Science:
- Cell biology
- Biochemistry
- Medical diagnostics
Background:
- Lysosomes are vital cellular organelles involved in lipid metabolism, inflammation, and maintaining homeostasis.
- Lysosomal dysfunction and oxidative stress are interconnected, driving the development and instability of atherosclerosis.
- Accurate assessment of lysosomal oxidative stress is crucial for monitoring atherosclerosis progression and early diagnosis.
Purpose of the Study:
- To develop and validate a novel fluorescent probe for evaluating oxidative stress within lysosomes in the context of atherosclerosis.
- To assess the probe's specificity, sensitivity, and cellular localization for detecting malondialdehyde.
Main Methods:
- Construction of a malondialdehyde-activated fluorescent probe (Lyso-Np-Hy) using naphthalimide dye and a hydrazine group.
- Evaluation of the probe's performance in living cells, including specificity, sensitivity, and lysosomal targeting.
- Application of the probe to monitor malondialdehyde levels in lysosomes across different stages of atherosclerosis.
Main Results:
- The developed probe, Lyso-Np-Hy, demonstrated high specificity and sensitivity to malondialdehyde in living cells.
- The probe exhibited excellent localization within cellular lysosomes.
- Lyso-Np-Hy successfully monitored malondialdehyde levels in lysosomes during various stages of atherosclerosis progression.
Conclusions:
- A novel chemical tool, Lyso-Np-Hy, has been developed for the effective evaluation of lysosomal oxidative stress.
- This probe offers a valuable method for tracking atherosclerosis progression and assessing lysosomal dysfunction.
- The findings provide a new approach for early diagnosis and monitoring of atherosclerosis.
