Conformationally Induced Off-On Two-Photon Fluorescent Bioprobes for Dynamically Tracking the Interactions among Multiple Organelles

Anal Chem. 2019 May 21;91(10):6730-6737. doi: 10.1021/acs.analchem.9b00806. Epub 2019 Apr 30.

Abstract

Unveiling the synergism among multiple organelles for fully exploring the mysteries of the cell has drawn more and more attention. Herein, we developed two two-photon fluorescent bioprobes (Lyso-TA and Mito-QA), of which the conformational change triggered an "off-on" fluorescent response. Lyso-TA can real-time monitor the fusion and movement of lysosomes as well as unveil the mitophagy process with the engagement of lysosomes. Mito-QA was transformed from Lyso-TA by one-step ambient temperature reaction, visualizing the dysfunctional mitochondria through a shift from mitochondria to nucleoli. With superior two-photon absorption cross section, good biocompatibility, and greater penetration depth, two small bioprobes were both applied in in vivo bioimaging of brain tissues and zebrafish.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acrylonitrile / analogs & derivatives
  • Acrylonitrile / chemical synthesis*
  • Acrylonitrile / radiation effects
  • Acrylonitrile / toxicity
  • Animals
  • Brain / metabolism
  • Cell Nucleolus / metabolism
  • Fluorescent Dyes / chemical synthesis
  • Fluorescent Dyes / chemistry*
  • Fluorescent Dyes / radiation effects
  • Fluorescent Dyes / toxicity
  • HeLa Cells
  • Humans
  • Lysosomes / metabolism*
  • Microscopy, Fluorescence / methods
  • Mitochondria / metabolism*
  • Mitophagy / physiology
  • Molecular Conformation
  • Photons
  • Zebrafish

Substances

  • Fluorescent Dyes
  • Acrylonitrile