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Related Experiment Video

Updated: Apr 16, 2026

Subtype-specific Optical Action Potential Recordings in Human Induced Pluripotent Stem Cell-derived Ventricular Cardiomyocytes
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Pulse splitter-based nonlinear microscopy for live-cardiomyocyte imaging.

Zhonghai Wang1, Wan Qin1, Yonghong Shao2

  • 1Department of Bioengineering, COMSET, Clemson University, Clemson, SC 29631, USA.

Proceedings of Spie--The International Society for Optical Engineering
|March 14, 2015
PubMed
Summary
This summary is machine-generated.

A novel pulse-splitter system significantly reduces photodamage in neonatal cardiomyocytes during imaging. This breakthrough enables long-term, high-quality live cell imaging for studying sarcomeric addition in heart development.

Keywords:
SHGTPEFcardiomyocytehypertrophylive imagingpulse-splitter

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Area of Science:

  • Cardiovascular Biology
  • Biomedical Imaging
  • Cellular Physiology

Background:

  • Second harmonic generation (SHG) microscopy is crucial for studying sarcomeric addition in neonatal cardiomyocytes.
  • Neonatal cardiomyocytes are highly susceptible to photodamage with conventional SHG systems, hindering research.
  • Existing SHG techniques limit the duration and intensity of live cell imaging.

Purpose of the Study:

  • To develop an advanced imaging system minimizing photodamage in neonatal cardiomyocytes.
  • To enable prolonged, high-resolution live imaging of sarcomeric addition processes.
  • To overcome limitations of conventional SHG microscopy in early-stage cell cultures.

Main Methods:

  • Integration of a pulse-splitter system into a two-photon excitation fluorescence (TPEF) and SHG hybrid microscope.
  • Utilizing the pulse-splitter to reduce laser-induced photodamage to sensitive neonatal cardiomyocytes.
  • Implementing continuous live imaging of cardiomyocytes over extended periods.

Main Results:

  • The pulse-splitter system dramatically reduced photodamage, significantly increasing cardiomyocyte viability.
  • Achieved continuous live imaging of neonatal cardiomyocytes with enhanced laser power and duration.
  • Demonstrated successful long-term observation of sarcomeric addition dynamics.

Conclusions:

  • The developed pulse splitter-based TPEF-SHG microscope is ideal for studying sarcomeric addition in neonatal cardiomyocytes.
  • This advanced imaging approach overcomes previous photodamage limitations in live cardiomyocyte studies.
  • Enables more comprehensive and systematic investigations into heart development and cellular repair mechanisms.