Microstructured hybrid scaffolds for aligning neonatal rat ventricular myocytes

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cardiovascular Research

Background:

• In vitro models are crucial for studying heart tissue mechanisms.
• Scaffolds enhance realism in cardiac tissue engineering (TE) models.
• Mimicking native heart architecture is key for TE.

Purpose of the Study:

• To develop novel cardiovascular-mimetic scaffolds using Parylene C and Polydimethylsiloxane (PDMS).
• To investigate the fabrication of hybrid and non-hybrid micropatterned PDMS scaffolds.
• To assess the impact of these scaffolds on Neonatal Rat Ventricular Myocyte (NRVM) growth and alignment.

Main Methods:

• Fabrication of Parylene C/PDMS hybrid and non-hybrid scaffolds.
• Utilizing Parylene C as a mask for micropatterning PDMS.
• Characterizing micro- and nanoscale wavy features on PDMS.
• Culturing NRVMs on fabricated scaffolds to evaluate cell behavior.

Main Results:

• Successfully fabricated micro- and nanoscale wavy PDMS features.
• Demonstrated PDMS integration into microfabrication without property alteration.
• Observed significant NRVM cell alignment exclusively on hybrid hydrophilic PDMS/hydrophobic Parylene C scaffolds.

Conclusions:

• Novel Parylene C/PDMS scaffolds offer a robust platform for cardiovascular TE.
• Hybrid scaffold architectures with specific surface properties are essential for directing cell alignment.
• These findings advance the development of biomimetic in vitro models for cardiac research.