Autism Spectrum Disorder and Perivascular Spaces: An Integrative Perspective Across the Lifespan

Area of Science:

• Neuroscience
• Developmental Biology
• Radiology

Background:

• Autism Spectrum Disorder (ASD) is a neurodevelopmental condition with poorly understood adult progression.
• Perivascular space (PVS) abnormalities, particularly enlarged PVS (ePVS), are observed in children with ASD, suggesting early neurovascular and cerebrospinal fluid (CSF) homeostasis alterations.
• The persistence and evolution of PVS abnormalities throughout the lifespan in ASD remain unexplored.

Purpose of the Study:

• To investigate the role of PVS abnormalities in the aging brain of individuals with Autism Spectrum Disorder.
• To explore whether PVS alterations represent enduring traits or dynamic indicators of disease progression in ASD across the lifespan.
• To examine the potential of PVS as a unifying mechanism linking early neurodevelopmental divergence to later neurovascular vulnerability and cognitive aging in ASD.

Main Methods:

• Utilizing advanced ultra-high-field MRI for precise in vivo quantification of PVS burden.
• Employing automated segmentation techniques for accurate PVS measurement.
• Combining structural and functional neuroimaging methodologies to assess PVS trajectories.

Main Results:

• Early PVS abnormalities in children with ASD correlate with increased extra-axial CSF and clinical severity.
• Evidence suggests PVS alterations may indicate impaired neurovascular integrity and glymphatic clearance in ASD.
• The study hypothesizes that PVS changes may link early neurodevelopmental trajectories to later neurovascular vulnerability and cognitive aging in ASD.

Conclusions:

• PVS abnormalities may be a critical factor in understanding the lifespan trajectory of Autism Spectrum Disorder.
• Further research into PVS dynamics could reveal insights into the continuum between neurodevelopmental and neurodegenerative processes in ASD.
• PVS quantification offers potential for identifying therapeutic targets for managing neurovascular health in aging autistic adults.