High throughput micro-well generation of hepatocyte micro-aggregates for tissue engineering

Area of Science:

• Biotechnology
• Tissue Engineering
• Cell Biology

Background:

• Maintaining primary hepatocyte function in vitro is crucial for hepatic tissue engineering.
• Hepatocyte dedifferentiation in culture limits long-term applications.
• Cell aggregation is a promising strategy to preserve hepatocyte phenotype.

Purpose of the Study:

• To develop a high-throughput method for generating uniform hepatocyte aggregates.
• To investigate the effect of aggregate size on hepatocyte-specific marker expression.
• To evaluate the long-term stability of encapsulated hepatocyte aggregates.

Main Methods:

• Utilized an agarose micro-well chip for controlled hepatocyte aggregation.
• Encapsulated uniform hepatocyte aggregates in methacrylamide-modified gelatin hydrogels.
• Assessed hepatocyte phenotype and marker expression over 21 days.

Main Results:

• The micro-well chip enabled high-throughput generation of uniform hepatocyte aggregates.
• Hepatocyte aggregation positively influenced specific marker expression, dependent on aggregate size.
• Encapsulation in methacrylamide-gelatin hydrogels maintained stable hepatocyte phenotype for 21 days.

Conclusions:

• Micro-well chips are effective for generating hepatocyte aggregates with size-dependent phenotypic benefits.
• Methacrylamide-modified gelatin hydrogels are suitable for encapsulating and preserving hepatocyte aggregates.
• This approach advances hepatic tissue engineering by stabilizing hepatocyte function in vitro.