Functional Evaluation of 3D Liver Models Labeled with Polysaccharide Functionalized Magnetic Nanoparticles

Area of Science:

• Biotechnology
• Nanomedicine
• Hepatology

Background:

• Rapid in vitro drug screening is crucial for new drug development.
• Three-dimensional (3D) culture systems using microfabrication offer more physiologically relevant models.
• Patterned substrates enable the creation of 3D liver models with specific structures and functions.

Purpose of the Study:

• To evaluate the impact of magnetic iron oxide nanoparticle labeling on the function of 3D liver models.
• To synthesize and characterize nanoparticle derivatives for potential use as MRI contrast agents.
• To assess the toxicity and functional capacity (CYP3A, albumin secretion) of nanoparticle-labeled 3D liver models.

Main Methods:

• Synthesis and morphological examination of four types of magnetic iron oxide nanoparticle derivatives.
• Preparation of primary hepatocyte-endothelial cell heterospheroids as 3D liver models.
• Evaluation of heterospheroid toxicity, CYP3A activity, and albumin secretory capacity after nanoparticle labeling.

Main Results:

• Nanoparticle derivatives exhibited smooth-edged spherical morphology.
• Heterospheroids labeled with both anionic and cationic nanoparticles showed reduced liver function over time compared to unlabeled controls.
• Labeling with nanoparticles led to decreased toxicity, CYP3A, and albumin secretory capacity.

Conclusions:

• Current magnetic iron oxide nanoparticle labeling methods can impair the function of 3D liver models.
• Further research is needed to optimize artificial 3D liver creation or develop less invasive MRI contrast agents for labeling.
• This highlights a challenge in integrating diagnostic imaging agents with functional in vitro tissue models for drug screening.