Reversible spatial and temporal control of lipid signaling

Chem Commun (Camb). 2020 Sep 15;56(73):10646-10649. doi: 10.1039/d0cc04146g.

Abstract

Herein, we introduce versatile molecular tools that enable specific delivery and visualization of photoswitchable lipids at cellular membranes, namely at the plasma membrane and internal membranes. These molecules were prepared by tethering ortho-nitrobenzyl-based fluorescent cages with a signaling lipid bearing an azobenzene photoswitch. They permit two sequential photocontrolled reactions, which are uncaging of a lipid analogue and then its repeated activation and deactivation. We used these molecules to activate GPR40 receptor transiently expressed in HeLa cells and demonstrated downstream modulation of intracellular Ca2+ levels.

MeSH terms

  • Azo Compounds / chemistry*
  • Azo Compounds / radiation effects
  • Calcium / metabolism
  • Fluorescent Dyes / chemistry*
  • Fluorescent Dyes / radiation effects
  • Green Fluorescent Proteins / metabolism
  • HeLa Cells
  • Humans
  • Microscopy, Confocal
  • Microscopy, Fluorescence
  • Receptors, G-Protein-Coupled / metabolism
  • Rhodamines / chemistry*
  • Rhodamines / radiation effects
  • Ultraviolet Rays

Substances

  • Azo Compounds
  • FFAR1 protein, human
  • Fluorescent Dyes
  • Receptors, G-Protein-Coupled
  • Rhodamines
  • Green Fluorescent Proteins
  • Calcium