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  • Title: A novel viscosity-sensitive fluorescent probe for monitoring the changes of mitochondrial viscosity.
    Author: Li X, Guo R, Gong X, Yang Y, Lin W.
    Journal: Luminescence; 2023 Sep; 38(9):1618-1623. PubMed ID: 37376960.
    Abstract:
    As a fundamental physical parameter, viscosity influences the diffusion in biological processes. The changes in intracellular viscosity led to the occurrence of relevant diseases. Monitoring changes in cellular viscosity is important for distinguishing abnormal cells in cell biology and oncologic pathology. Here, we devised and synthesized a viscosity-sensitive fluorescent probe LBX-1. LBX-1 showed high sensitivity, providing a large Stokes shift as well as an enhancement in fluorescent intensity (16.1-fold) from methanol solution to glycerol solution. Furthermore, the probe LBX-1 could localize in mitochondria because of the ability of the probe to penetrate the cell membrane and accumulate in mitochondria. These results suggested that the probe could be utilized in monitoring the changes in mitochondrial viscosity in complex biological systems.
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