Contractility analysis of human engineered 3D heart tissues by an automatic tracking technique using a standalone...

Area of Science:

• Biomedical Engineering
• Cardiovascular Research
• In Vitro Modeling

Background:

• Engineered Heart Tissues (EHTs) are increasingly used for disease modeling and drug screening.
• Existing analysis methods for EHTs lack standardization, robustness, and automation.
• Accurate analysis of EHT physiological features is crucial for reliable in vitro studies.

Purpose of the Study:

• To develop and validate a standalone application for automatic, unbiased, and robust analysis of EHTs.
• To provide a tool for analyzing contractile properties and contraction kinetics of EHTs.
• To facilitate and accelerate post-analysis by generating comprehensive summary data.

Main Methods:

• Development of a standalone application named "EHT Analysis" with automatic and manual modes.
• Analysis of high-speed bright-field videos of EHTs to assess contractile properties and kinetics.
• Incorporation of axial stress (force per surface area) analysis for tissue compaction insights.

Main Results:

• The "EHT Analysis" application provides automatic, robust, and unbiased analysis with low computational time.
• Generated outputs include graphs of displacement, contraction force, contraction kinetics, and raw data.
• The tool demonstrated utility in analyzing contractile properties and compaction of EHTs with varying fibroblast ratios.

Conclusions:

• The "EHT Analysis" application offers a standardized and efficient method for analyzing EHT physiological features.
• Axial stress analysis provides critical insights into tissue compaction over time.
• This tool is applicable to various studies involving EHTs, including drug compound effects and disease modeling.