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Updated: Mar 22, 2026

A Fluorescence Fluctuation Spectroscopy Assay of Protein-Protein Interactions at Cell-Cell Contacts

A Fluorescence Fluctuation Spectroscopy Assay of Protein-Protein Interactions at Cell-Cell Contacts

Published on: December 1, 2018

Two-photon light-sheet nanoscopy by fluorescence fluctuation correlation analysis.

Xuanze Chen¹, Weijian Zong, Rongqin Li

¹State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, P.R. China. sun_yujie@pku.edu.cn.

|April 29, 2016

Summary

This summary is machine-generated.

We developed two-photon super-resolution light-sheet imaging via stochastic optical fluctuation imaging (2PLS-SOFI) for faster, deeper 3D live cell imaging. This advanced microscopy technique significantly enhances spatial and temporal resolution for subcellular structure visualization.

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Area of Science:

Biophysics
Microscopy
Optical Imaging

Background:

Light-sheet microscopy enables fast 3D imaging of live specimens with reduced photodamage.
Super-resolution microscopy combined with light-sheet illumination offers potential for resolving subcellular structures.
Existing super-resolution light-sheet methods using single-molecule localization have limitations in imaging depth and temporal resolution.

Purpose of the Study:

To present a novel super-resolution light-sheet imaging technique, 2PLS-SOFI, that overcomes limitations of existing methods.
To achieve high spatiotemporal resolution and excellent optical sectioning for deep-tissue imaging.
To demonstrate enhanced imaging capabilities for live cells and bulk specimens.

Main Methods:

Developed two-photon super-resolution light-sheet imaging via stochastic optical fluctuation imaging (2PLS-SOFI).
Utilized a fast two-photon three-axis digital scanned light-sheet microscope (2P3A-DSLM) for non-linear excitation of fluctuation probes.
Enabled deep penetration and thin light sheets for improved optical sectioning.

Main Results:

2PLS-SOFI achieved up to a 3-fold increase in spatial resolution compared to conventional two-photon light-sheet (2PLS) microscopy.
Demonstrated approximately a 40-fold enhancement in temporal resolution compared to individual molecule localization-selective plane illumination microscopy (IML-SPIM).
Showcased high spatiotemporal resolution and excellent optical sectioning ability.

Conclusions:

2PLS-SOFI offers significant improvements in spatial and temporal resolution for super-resolution light-sheet microscopy.
The technique is well-suited for 3D long-term, deep-tissue imaging applications.
2PLS-SOFI represents a promising advancement for visualizing subcellular dynamics in biological samples.