Researchers at Kobe University have made significant strides in understanding the genetic causes of autism spectrum disorder (ASD) by creating a bank of 63 mouse embryonic stem cell lines that incorporate mutations commonly associated with the condition. This advancement was facilitated by a new, efficient method for altering the genomes of embryonic stem cells, combining traditional manipulation techniques with the CRISPR gene-editing system.
While the influence of genetics on ASD is well-documented, identifying specific causes and mechanisms has proven challenging. To address this, researchers utilize both cell and animal models to examine how genetic alterations impact cell structure and overall health. Despite inherent differences between mice and humans, similarities in disease-causing genes provide valuable insights into human conditions.
Over the past twelve years, the research team, led by neuroscientist Takumi Toru, aimed to establish standardized biological models for studying the various mutations linked to ASD. Their innovative approach allowed for the development of diverse cell types and even adult mice with targeted genetic variations, confirming the effectiveness of their cell lines as models for ASD research.
Data analysis conducted on these cell lines revealed that mutations linked to autism often hinder neurons' ability to eliminate improperly shaped proteins, raising questions about the role of protein quality control in neuronal development.
The findings, published in the journal Cell Genomics, are anticipated to serve as a valuable resource for researchers investigating ASD and related neuropsychiatric disorders, such as schizophrenia and bipolar disorder. The study received funding from various Japanese research organizations and involved collaboration with multiple institutions, highlighting the collective effort in advancing the understanding of autism and its genetic underpinnings.