Vascular network-inspired diffusible scaffolds for engineering functional neural organoids

Area of Science:

• Biotechnology
• Developmental Biology
• Neuroscience

Background:

• Organoids are 3D in vitro cultures with potential in medicine but face diffusion limitations.
• Neural organoids, in particular, suffer from poor oxygen, nutrient, and drug diffusion.
• Current organoid models have limited physiological relevance and drug response accuracy.

Purpose of the Study:

• To develop Vascular network-Inspired Diffusible (VID) scaffolds for improved organoid generation.
• To overcome diffusion limitations in organoid cultures.
• To enhance the functionality and drug response phenotyping of engineered organoids.

Main Methods:

• 3D printing of meshed tubular channel networks (VID scaffolds).
• Generation of engineered human midbrain organoids using VID scaffolds.
• Comparison of engineered organoids with conventional organoids regarding necrosis, hypoxia, and function.
• Assessment of drug response in engineered versus conventional organoids.

Main Results:

• VID scaffolds enabled the generation of engineered human midbrain organoids with minimal necrosis and hypoxia.
• Engineered organoids exhibited enhanced physiological relevance, including midbrain identity, oxygen metabolism, and neuronal maturation.
• Engineered organoids demonstrated more accurate recapitulation of drug responses, such as to fentanyl exposure.
• Improved neuronal network activity was observed in engineered organoids.

Conclusions:

• VID scaffolds effectively address diffusion limitations in organoid culture.
• Engineered organoids generated using VID scaffolds offer improved physiological relevance and functionality.
• This approach holds promise for advancing organoid development and drug discovery.
• VID scaffolds and engineered organoids can provide insights for therapeutic innovation.