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Published on: September 13, 2017
Protocol for preparing sensor molecules and analyzing heterotypic endomembrane fusion in insulin-responsive cells
Hiroyasu Hatakeyama1, Makoto Kanzaki2
1Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai 980-8579, Japan; Graduate School of Biomedical Engineering, Tohoku University, Sendai 980-8579, Japan; Department of Physiology, Kitasato University School of Medicine, Sagamihara 252-0374, Japan.
Researchers developed a new method to detect cell membrane fusion using fluorescent sensors. This technique allows for the analysis of insulin-responsive glucose transporter (GLUT4) translocation in live cells.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Insulin stimulates glucose uptake via the translocation of GLUT4 glucose transporters.
- This translocation involves heterotypic endomembrane fusion between GLUT4 vesicles and endosomes.
- Understanding this fusion process is crucial for metabolic research.
Purpose of the Study:
- To provide a protocol for preparing fluorescent sensor molecules.
- To enable detection and analysis of heterotypic endomembrane fusion.
- To specifically study insulin-responsive GLUT4 translocation.
Main Methods:
- Development of BODIPY-based fluorescent sensor molecules.
- Detection of endomembrane fusion via streptavidin-biotin dequenching.
- Ratiometric analysis of insulin-responsive events using live-cell imaging.
Main Results:
- Successful preparation of fluorescent sensor molecules for fusion detection.
- Demonstration of ratiometric analysis for quantifying insulin-responsive fusion.
- Validation of the protocol for studying GLUT4 translocation.
Conclusions:
- The developed protocol enables sensitive detection of heterotypic endomembrane fusion.
- This method allows for ratiometric analysis of insulin-responsive GLUT4 translocation.
- The protocol is adaptable for studying other membrane fusion events.
