Biocompatibility and Connectivity of Semiconductor Nanostructures for Cardiac Tissue Engineering Applications

Area of Science:

• Bioelectronics
• Materials Science
• Cellular Engineering

Background:

• Nano- and microdevices are crucial for long-term, multisite cellular recording and stimulation.
• Advancements in cardiology and neuroscience rely on improved bioelectronic interfaces.
• Optimizing cell-to-circuit contact is a persistent challenge in developing advanced bioelectronic systems.

Purpose of the Study:

• To develop an innovative approach for eliciting bioelectrical information from cell membranes using integrated circuits (ICs) with nanowire (NW) coatings.
• To evaluate the biocompatibility and cell interaction of silicon (Si) and zinc oxide (ZnO) NWs as seeding substrates for different cell lines.
• To lay the groundwork for a new generation of NW-based devices for biological investigation and regenerative medicine.

Main Methods:

• Nanowires were grown directly on the backend of ICs for on-site signal amplification.
• Biocompatibility of Si and ZnO NWs was assessed using human cardiac stromal cells, BV-2 microglial-like cells, and GH4-C1 neuroendocrine-like cells.
• Cell behavior, morphology, growth, and cell membrane-NW interaction were analyzed.

Main Results:

• The study evaluated the effects of ZnO NWs on cardiac stromal cells, assessing length-dependent impacts on cell behavior.
• Si NWs were used to examine cell membrane-NW interactions with microglial-like and neuroendocrine-like cells.
• The integration of NWs on ICs demonstrated potential for enhanced bioelectric signal detection.

Conclusions:

• The developed technological approach, utilizing NW-coated ICs, offers a promising solution for improving bioelectronic device performance.
• This innovation may significantly advance the investigation of biological systems and the development of tissue engineering applications.
• The findings pave the way for new NW-based systems in regenerative medicine and bioelectronic research.