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Proceedings Article

Live cell studies of adhesion receptors by two-photon image correlation spectroscopy and image cross-correlation spectroscopy

[+] Author Affiliations
Paul W. Wiseman

McGill Univ. (Canada)

Jeffrey A. Squier

Univ. of California/San Diego (USA)

Proc. SPIE 4620, Multiphoton Microscopy in the Biomedical Sciences II, 54 (June 17, 2002); doi:10.1117/12.470675
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From Conference Volume 4620

  • Multiphoton Microscopy in the Biomedical Sciences II
  • Ammasi Periasamy; Peter T. C. So
  • San Jose, CA | January 19, 2002

abstract

Our ability to study the complex interactions between macromolecules within living cells has been greatly enhanced by the development of biophysical techniques such as fluorescence correlation spectroscopy (FCS) and multiphoton microscopy. One area of great interest to cell biologists is the molecular mechanism that governs cellular adhesion. Direct physical and chemical measurements on intact living cells will be important for obtaining a better understanding of how cells control their adhesive properties at the molecular level in order to control tissue development, maintain tissue integrity, and regulate cellular migration. Cells dynamically regulate the formation and disassembly of macromolecules in focal adhesions within the basal membrane so it would be advantageous to be able to measure such phenomena in situ. By combining two-photon microscopy imaging of living cells expressing fusion proteins of adhesion molecules and mutants of the green fluorescent protein, and image correlation spectroscopy (ICS) and image cross-correlation spectroscopy (ICCS) analysis, we have been able to perform direct studies of the molecular transport and clustering. We report on the characterization of flow, diffusion, aggregation, and co-localization of adhesion macromolecules/fluorescent protein constructs in living cells by two-photon ICS and ICCS experiments at 37 degree(s)C.

© (2002) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Paul W. Wiseman and Jeffrey A. Squier
"Live cell studies of adhesion receptors by two-photon image correlation spectroscopy and image cross-correlation spectroscopy", Proc. SPIE 4620, Multiphoton Microscopy in the Biomedical Sciences II, 54 (June 17, 2002); doi:10.1117/12.470675; http://dx.doi.org/10.1117/12.470675


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