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Related Experiment Video

Updated: Mar 9, 2026

A Quantitative Fluorescence Microscopy-based Single Liposome Assay for Detecting the Compositional Inhomogeneity Between Individual Liposomes
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Fluorescence-Based In Situ Quantitative Imaging for Cellular Lipids.

W Cho1, Y Yoon2, S-L Liu3

  • 1University of Illinois at Chicago, Chicago, IL, United States; Kyung Hee University, Yongin, South Korea.

Methods in Enzymology
|January 9, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed tunable fluorescence biosensors for quantitative in situ imaging of membrane lipids. This method reveals spatiotemporal dynamics and fluctuations of key signaling lipids in mammalian cells.

Keywords:
FluorescenceLipid imagingLipid sensorsLipid signaling

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Molecular Imaging

Background:

  • Membrane lipids are crucial regulators of cellular processes.
  • Accurate, in situ quantification of lipid dynamics is essential for understanding cell signaling.
  • Existing methods may lack the sensitivity or dynamic range for comprehensive lipid analysis.

Purpose of the Study:

  • To develop a novel ratiometric analysis method for quantitative in situ imaging of membrane lipids.
  • To engineer tunable fluorescence biosensors with variable dynamic ranges for lipid detection.
  • To provide new insights into the spatiotemporal dynamics and fluctuations of key signaling lipids.

Main Methods:

  • Development of ratiometric fluorescence biosensors, each comprising an engineered lipid-binding protein and a solvatochromic fluorophore.
  • Engineering of lipid-binding proteins to achieve variable dynamic ranges for broad lipid concentration coverage.
  • Application of the sensor strategy for robust and sensitive in situ quantitative lipid imaging in mammalian cells.

Main Results:

  • Successful development of tunable sensors enabling quantitative in situ lipid imaging.
  • Demonstration of robust and sensitive detection of lipid concentrations in mammalian cells.
  • Observation of spatiotemporal dynamics and fluctuations of key signaling lipids.

Conclusions:

  • The developed ratiometric sensor strategy enables sensitive and quantitative in situ imaging of membrane lipids.
  • Tunable biosensors provide new insights into lipid signaling dynamics within cells.
  • The approach is versatile, applicable to multiple lipids or specific membrane leaflets.