Current Trends in Brain Organoid Research: Scientific Opportunities and Challenges

Brain organoids, derived from human pluripotent stem cells, have become essential culture-based models for studying the human brain. These organoids recapitulate key aspects of brain development and function, offering insights into the pathogenesis of not only neurodevelopmental disorders but also neurodegenerative diseases and brain cancer. Despite their promise, organoids face limitations such as lack of vascularization, non-neural cell types, and structural organization. Researchers are addressing these issues through modification of culture conditions, which include co-culture approaches to incorporate cells of non-neural origin as well as bioengineering approaches like 3D bioprinting to more accurately replicate complex brain structure. Current organoid models have already provided valuable insights into the mechanisms of neurological and psychiatric disorders, particularly the emerging concept of phenotypic convergence in autism spectrum disorder during early brain development. Technological advances such as CRISPR screening together with improvements in organoid protocols have the potential to further increase the value of organoids as a model for human brain function and could be integral to our discovery of novel treatments for brain disorders.