Simple and efficient delivery of cell-impermeable organic fluorescent probes into live cells for live-cell superresolution imaging.
Meng ZhangMeihua LiWenting ZhangYubing HanYu-Hui ZhangPublished in: Light, science & applications (2019)
Numerous commercial organic fluorophores with excellent optical properties are precluded from live-cell superresolution imaging due to poor cell permeability. Here, we develop a simple but effective strategy that renders cells permeable to cell-impermeable, organic fluorescent probes by using a novel peptide vehicle, PV-1. By simple coincubation with PV-1, 22 different cell-impermeable, organic fluorescent probes were efficiently delivered into live cells and specifically labeled a variety of organelles. Moreover, PV-1 can simultaneously transfer up to three different probes into live cells. By using PV-1 and these cell-impermeable fluorescent probes, we obtained multicolor, long-term, live-cell superresolution images of various organelles, which allowed us to study the dynamic interactions between them. PV-1, together with these organic fluorescent probes, will greatly broaden the applications of superresolution imaging technology in diverse live-cell studies and opens up a new avenue in the design and application of peptide vehicles.
Keyphrases
- living cells
- induced apoptosis
- single cell
- small molecule
- fluorescence imaging
- cell therapy
- cell cycle arrest
- fluorescent probe
- single molecule
- stem cells
- endoplasmic reticulum stress
- cell death
- computed tomography
- optical coherence tomography
- label free
- machine learning
- bone marrow
- mass spectrometry
- pet imaging
- photodynamic therapy
- pi k akt