Culturing Cardiac Tissue Slices Under Continuous Physiological Mechanical Stretches

Area of Science:

• Cardiovascular Research
• Drug Discovery
• Tissue Engineering

Background:

• In vitro models improve detection of adverse cardiac events before human trials.
• Current models fail to fully replicate the human myocardium's complex multicellular organization.
• Limitations in existing models necessitate advanced platforms for comprehensive cardiac safety testing.

Purpose of the Study:

• To present detailed methods for culturing cardiac tissue slices.
• To introduce the cardiac tissue culture model (CTCM) for long-term cardiac tissue slice maintenance.
• To highlight the CTCM's potential as a medium-throughput screening platform for personalized drug testing.

Main Methods:

• Cardiac tissue slices (300-micron thin) were cultured using essential nutrients and electrical stimulation.
• Mechanical stimulation and humoral cues were added to extend culture viability to 12 days.
• The cardiac tissue culture model (CTCM) device was utilized to maintain tissue slices under continuous mechanical stimulation.

Main Results:

• Cardiac tissue slices maintained viability and functionality for up to 12 days in the CTCM.
• The CTCM successfully incorporated mechanical stimulation, electrical stimulation, nutrients, and humoral cues.
• The CTCM demonstrated potential for modeling disease conditions like overstretch-induced cardiac hypertrophy.

Conclusions:

• Cardiac tissue slices cultured in the CTCM represent a viable alternative to current in vitro models.
• The CTCM supports long-term culture and functionality of cardiac tissue, enabling more accurate drug screening.
• The CTCM's versatility positions it as a promising platform for medium-throughput screening and personalized drug testing.