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Related Experiment Video

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In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
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Functional cardiac imaging by random access microscopy.

Claudia Crocini1, Raffaele Coppini2, Cecilia Ferrantini3

  • 1European Laboratory for Non-Linear Spectroscopy (LENS) Florence, Italy.

Frontiers in Physiology
|November 5, 2014
PubMed
Summary
This summary is machine-generated.

New optical methods using ultrafast deflectors enable simultaneous imaging and control of electrical activity and calcium (Ca2+) dynamics in cardiac cells. This approach promises deeper insights into cardiac diseases and excitable cell physiology.

Keywords:
calcium imagingchannelrhodopsinfluorescencemicroscopyoptical stimulationvoltage-sensitive dye imaging

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Area of Science:

  • Biophysics
  • Cellular Physiology
  • Optical Imaging

Background:

  • Voltage-sensitive dyes and Ca(2+) sensors combined with advanced microscopy offer high-resolution functional measurements.
  • Current limitations include the inability to image multiple fast phenomena while controlling biological determinants.
  • Understanding cardiac cell electrophysiology and Ca(2+) handling is crucial for disease research.

Purpose of the Study:

  • To introduce a novel optical methodology for simultaneous imaging and manipulation of cellular electrophysiology and Ca(2+) dynamics.
  • To overcome the limitations of current technologies in studying fast biological phenomena.
  • To explore the impact of induced perturbations on physiological cell activity.

Main Methods:

  • Utilizing ultrafast deflectors for rapid laser scanning across biological samples.
  • Performing optical measurements of action potentials and Ca(2+) release from multiple sites in cardiac cells.
  • Employing caged compounds and light-gated ion channels for controlled local Ca(2+) release and membrane electrical activity modulation.

Main Results:

  • Demonstrated capability for high-resolution, multi-site optical measurements of action potentials and Ca(2+) transients.
  • Showcased the potential to induce and study simulated arrhythmogenic events by precise control of Ca(2+) and voltage.
  • Established a foundation for exploring the physiological impact of localized perturbations in excitable cells.

Conclusions:

  • The developed optical methodology provides unprecedented spatial and temporal resolution for studying excitable cells.
  • This approach offers fundamental insights into cardiac disease mechanisms and potential therapeutic strategies.
  • Represents a significant advancement in the investigation of excitable cell physiology.