Meng-Yang Li, Kun Li, Yan-hong Liu
Jan 20, 2020
Citations
1
Influential Citations
42
Citations
Journal
Analytical chemistry
Abstract
A mitochondria targeting and immobilized fluorescent probe (Rd1) using triphenylphosphonium as the targeting group and methoxymaleimide as the fixed site is designed for the detection of ClO‾. The methoxymaleimide fixed group can react with nucleophiles, such as the reactive thiol groups present in mitochondrial polypeptides and proteins, and form covalent bonds to immobilize the probe within mitochondria. The immobilization of Rd1 enhances its ability to withstand the risk of leakage from mitochondria. Methoxymaleimide shows better reactivity towards Cys than GSH, which decreases the ineffective labeling of GSH when it covalently bonds with the reactive thiol residues of mitochondrial proteins; furthermore, it can resist hydrolysis during a long-term storage in water compared with the classic benzyl chloride fixed unit. The imaging results indicate that Rd1 displays enhanced retention within the mitochondria of cells and tissues upon the decrease of MMP caused by different stimulations. Furthermore, it possesses the ability to visualize exogenous and endogenous ClO‾ in living cells, tissues and zebrafishes.