Brain-Region-Specific Organoids Using Mini-bioreactors for Modeling ZIKV Exposure

Area of Science:

• Neuroscience
• Developmental Biology
• Biotechnology

Background:

• Cerebral organoids offer a model for human brain development but face limitations like cost and variability.
• Investigating human brain development and diseases requires advanced, accessible modeling systems.

Purpose of the Study:

• To develop a miniaturized spinning bioreactor (SpinΩ) for generating region-specific human brain organoids.
• To utilize these organoids for modeling Zika virus (ZIKV) infection and its effects on neural development.
• To establish a versatile platform for disease modeling and drug screening.

Main Methods:

• Generation of forebrain, midbrain, and hypothalamic organoids from human induced pluripotent stem cells (iPSCs) using the SpinΩ bioreactor.
• Characterization of organoid development, including progenitor organization, neurogenesis, and gene expression.
• Modeling Zika virus (ZIKV) infection in forebrain organoids and quantifying viral effects on neural cells.

Main Results:

• SpinΩ successfully generated human brain organoids recapitulating key developmental features, including a human-specific outer radial glia layer.
• Organoids exhibited region-specific development (forebrain, midbrain, hypothalamus).
• ZIKV infection preferentially targeted neural progenitors, leading to increased cell death, reduced proliferation, and microcephaly-like phenotypes.

Conclusions:

• The SpinΩ bioreactor provides an accessible and versatile platform for generating region-specific human brain organoids.
• These organoids effectively model human brain development and ZIKV-induced microcephaly.
• The platform is suitable for studying neurodevelopmental diseases and screening potential antiviral therapeutics for ZIKV.