The development, use, and challenges of electromechanical tissue stimulation systems

Area of Science:

• Biomedical Engineering
• Cell Biology
• Tissue Engineering

Background:

• Tissue stimulation influences cell growth, phenotype, and function, crucial for modeling tissue physiology.
• In vitro tissue stimulation models aim to replicate in vivo tissue responses and understand cellular mechanisms.
• Developing accurate tissue models is essential for advancing regenerative medicine and disease research.

Purpose of the Study:

• To review the development and validation of tissue stimulators for electrical and mechanical applications.
• To assess the capabilities of current engineered tissue platforms in applying various stimulations.
• To identify challenges and limitations in current tissue simulator technologies.

Main Methods:

• Comprehensive review of existing literature on tissue stimulator development.
• Analysis of engineered tissue platforms capable of applying diverse mechanical stimuli (tensile, compression, torsion, shear).
• Evaluation of electrical stimulators designed for specific signal shapes, amplitudes, and load cycles.

Main Results:

• Engineered tissue platforms support various mechanical stimulations, from uniaxial to biaxial strain.
• Electrical stimulators are available for diverse applications, including stem cell development and tissue regeneration.
• Real-time morphological observation during stimulation is possible with some advanced systems.

Conclusions:

• Current tissue stimulators offer significant advancements but require further improvement.
• Future developments should focus on complex loading cycles and coupled electrical/mechanical/biological stimuli.
• Enhancing strain-field accuracy and response to applied inputs is critical for better physiological replication.