Extracellular Vesicle Profiling Reveals Novel Autism Signatures in Patient-Derived Forebrain Organoids

Area of Science:

• Neuroscience
• Genetics
• Cell Biology

Background:

• Autism Spectrum Disorder (ASD) affects 1% of the global population, with a significant increase in prevalence.
• Altered synaptic function is implicated in ASD, but underlying molecular mechanisms are not well-defined.
• Extracellular vesicles (EVs), particularly exosomes, are crucial for brain cell communication and implicated in various diseases.

Purpose of the Study:

• To investigate the role of EVs in ASD by characterizing EVs secreted from patient-derived cortical organoids.
• To define the cargo of these EVs and compare them to EVs from healthy control organoids.
• To explore the potential of EVs as biomarkers and therapeutic targets for ASD.

Main Methods:

• Utilized patient-derived cortical organoid models (3D human tissue).
• Employed small RNA sequencing and proteomics to analyze EV cargo.
• Used nanoparticle tracking and microscopy for comprehensive EV characterization.

Main Results:

• Demonstrated, for the first time, significant alterations in EVs derived from ASD cortical organoids compared to controls.
• Revealed substantial differences in both RNA and protein content within ASD-derived EVs.
• Provided a comprehensive cargo analysis of EVs secreted from human 3D forebrain models.

Conclusions:

• ASD-derived EVs exhibit distinct molecular cargo, offering novel insights into the disorder's underlying mechanisms.
• EVs represent a promising avenue for developing exosome-based diagnostics for ASD.
• The findings highlight the therapeutic potential of targeting or utilizing EVs in ASD management.