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Oligomerization Dynamics of Cell Surface Receptors in Living Cells by Total Internal Reflection Fluorescence Microscopy Combined with Number and Brightness Analysis
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Biologia
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JoVE Journal Biologia
Oligomerization Dynamics of Cell Surface Receptors in Living Cells by Total Internal Reflection Fluorescence Microscopy Combined with Number and Brightness Analysis

Oligomerization Dynamics of Cell Surface Receptors in Living Cells by Total Internal Reflection Fluorescence Microscopy Combined with Number and Brightness Analysis

DOI:
10.3791/60398-v

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10:43 min

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November 06, 2019

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, , , ,
1Unit of Microscopy and Dynamic Imaging,Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain, 2Centro di Imaging Sperimentale,Ospedale San Raffaele, Milan, Italy, 3Unit of Gynecological Oncology Research,European Institute of Oncology IRCCS, Milan, Italy

Capitoli

  • 00:04Titolo
  • 01:48Sample Preparation
  • 02:38TIRF Imaging: Alignment of the Laser Line and Optimization of TIRF Illumination
  • 04:05TIRF Imaging: Capture of the Time Series
  • 05:46Number & Brightness (N&B): Quality Check of the Time Series
  • 06:34Number & Brightness (N&B): Computation of the B-values in Selected Region-of-interest (ROI)
  • 08:19Results: N&B Analysis and Kinetics of FGFR1 Oligomerization
  • 09:42Conclusion

Summary

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We describe an imaging approach for the determination of the average oligomeric state of mEGFP-tagged-receptor oligomers induced by ligand binding in the plasma membrane of living cells. The protocol is based on Total Internal Reflection Fluorescence (TIRF) microscopy combined with Number and Brightness (N&B) analysis.

Tags

OligomerizationCell Surface ReceptorsTIRF MicroscopyNumber And Brightness AnalysisReceptor ClusteringFGFR1Fluorescence FluctuationLive Cell ImagingProtein OligomerizationCell Signaling

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