Enhancing Biocompatibility: 3D-Printed Cyclic Olefin Copolymer Structures for Advanced Laboratory Applications

Area of Science:

• Biomaterials Science
• Cell Biology
• Additive Manufacturing

Background:

• Additive manufacturing, or 3D-printing, is vital for creating prototypes and specialized components in scientific fields.
• Biocompatibility of 3D-printed materials is critical for cell-based research and millifluidic applications, influencing cell culture and interactions with reactive substances.

Purpose of the Study:

• To investigate the biocompatibility and performance of 3D-printed cyclic olefin copolymer (COC) and polylactic acid (PLA) compared to traditional materials.
• To assess the impact of these materials on cell viability, metabolic activity, and potential toxicity using specific cell lines.

Main Methods:

• Experiments utilized rat cardiomyocyte (H9c2) and human embryonal kidney (HEK293) cell lines.
• Assays included lactate, lactate dehydrogenase (LDH), and thiazolyl blue tetrazolium bromide to evaluate metabolic activity, cell stress, and viability.
• Microscopy and atomic force microscopy (AFM) were employed to visualize cell growth and analyze surface characteristics.

Main Results:

• Glass + COC demonstrated increased metabolic activity and cell viability compared to standard polystyrene (PS) dishes.
• COC and PLA materials showed comparable cell viability to standard PS dishes, with a slight advantage for COC.
• Lactate assays indicated subtle increases in secretion, particularly with Glass + COC, correlating with cell viability.

Conclusions:

• 3D-printed COC and Glass + COC are biocompatible materials suitable for cell-based research and millifluidic applications.
• Material selection significantly impacts cell viability, metabolic activity, and lactate levels in cell culture.
• Microscopy and AFM analyses provide crucial insights into cell behavior and material properties for optimizing biocompatible 3D-printed applications.