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Calcium Imaging In Electrically Stimulated Flat-Mounted Retinas
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Calcium imaging in the optical stretcher.

Markus Gyger1, Daniel Rose, Roland Stange

  • 1Institut für Experimentelle Physik I, Abteilung für Physik der Weichen Materie, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany. Markus.Gyger@uni-leipzig.de

Optics Express
|October 15, 2011
PubMed
Summary
This summary is machine-generated.

The Microfluidic Optical Stretcher (MOS) measures cell mechanics and calcium (Ca2+) influx simultaneously. This combined technique reveals how cell stretching influences Ca2+ signaling, offering new insights into cell behavior regulation.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Optical Engineering

Background:

  • The Microfluidic Optical Stretcher (MOS) is a tool for measuring single-cell mechanical properties.
  • Calcium (Ca2+) signaling plays a crucial role in various cellular processes.
  • Understanding the interplay between cell mechanics and Ca2+ dynamics is essential.

Purpose of the Study:

  • To combine optical stretching with fluorescent calcium imaging.
  • To demonstrate the versatility of this integrated setup using a heat-sensitive cation channel cell line.
  • To investigate the role of Ca2+ in regulating cell mechanical behavior.

Main Methods:

  • Utilized a Microfluidic Optical Stretcher (MOS) for cell manipulation.
  • Performed simultaneous fluorescent calcium imaging using Fluo-4 dye.
  • Employed confocal laser scanning microscopy for high-resolution imaging.
  • Applied heat transfer during optical stretching to activate cation channels.

Main Results:

  • Successfully integrated optical stretching with Ca2+ imaging in a single setup.
  • Demonstrated heat-induced Ca2+ influx in cells expressing heat-sensitive cation channels during stretching.
  • Quantified the pronounced Ca2+ influx correlated with mechanical stress.

Conclusions:

  • The combined MOS and Ca2+ imaging technique is versatile for studying cell mechanics and signaling.
  • This method provides new perspectives on the role of Ca2+ in regulating cell mechanical properties.
  • The setup facilitates investigations into mechanotransduction pathways involving Ca2+.