Glass-based organ-on-a-chip device for restricting small molecular absorption

Area of Science:

• Biotechnology
• Drug Discovery
• Materials Science

Background:

• Organ-on-a-chip (OOC) devices offer a promising alternative to traditional cell-based assays and animal testing.
• Polydimethylsiloxane (PDMS) is commonly used for OOC fabrication but suffers from hydrophobic molecule absorption, leading to biased assay results.
• This absorption issue in PDMS OOCs hinders the accurate evaluation of small hydrophobic molecules.

Purpose of the Study:

• To develop and characterize a novel glass-based OOC device.
• To compare the performance of glass OOCs with traditional PDMS OOCs regarding medium flow and molecular absorption.
• To assess the potential of glass OOCs for precise cell-based assays involving hydrophobic compounds.

Main Methods:

• Fabrication of a glass-based OOC device.
• Characterization of medium flow dynamics in both glass and PDMS OOCs.
• Quantification of molecular absorption properties for small hydrophobic molecules in both device types.
• Evaluation of cell adhesiveness on the glass OOC surface.

Main Results:

• The glass OOC device demonstrated stable medium flow characteristics.
• The glass OOC significantly restricted the absorption of small hydrophobic molecules compared to PDMS.
• Enhanced cell adhesiveness was observed on the glass OOC surface.
• PDMS OOCs showed significant absorption of small hydrophobic molecules, impacting assay accuracy.

Conclusions:

• Glass-based OOC devices provide a more reliable platform for drug discovery assays.
• The reduced molecular absorption of glass OOCs overcomes limitations associated with PDMS devices.
• Glass OOCs are suitable for precise cell-based assays, particularly for evaluating small hydrophobic molecules.