Distinct protein profiles in cord blood plasma of children with autism spectrum disorder.

Researchers studied proteins in umbilical cord blood from 30 children with autism and 30 children without autism. They found over 500 proteins that were different between the groups, with most being higher in children with autism. The proteins were related to cell energy production, immune system, and brain development. This suggests that some autism-related changes might happen before birth and involve problems with how cells produce energy and communicate.

This study examined protein profiles in umbilical cord blood from 30 children with autism spectrum disorder (ASD) and 30 neurotypical controls using advanced proteomic analysis. Researchers identified 565 proteins with significantly different expression levels between groups, with most proteins more abundant in the ASD group. The protein expression patterns showed less variation in the ASD group, suggesting similar cellular activity patterns. Key findings included protein clusters related to mitochondria, endoplasmic reticulum, immune function, and cellular structure.

Twenty-four proteins showed strong predictive value for ASD, with some linked to brain development processes like synaptogenesis and myelination. The findings suggest ASD may involve a common pathway of mitochondrial and cellular dysfunction affecting brain development, potentially originating before birth.

This research suggests potential for prenatal biomarker development and early ASD identification through cord blood analysis. The findings point to mitochondrial and cellular communication dysfunction as key mechanisms in ASD development, potentially informing future therapeutic targets focused on cellular energy metabolism and synaptic development.

Single study with relatively small sample size (30 per group). Study type not clearly specified in metadata. Findings require replication in larger, independent cohorts. Clinical significance of protein differences needs validation through longitudinal follow-up studies.

Autism spectrum disorder (ASD) has a genetic origin in approximately 30% of cases, while the remaining causes are primarily linked to epigenetic and non-genetic factors. This study aims to identify potential non-genetic causes contributing to ASD by investigating the underlying cellular mechanisms through proteomic analysis. Extracellular vesicles (EVs) mediate cellular communication and are linked to brain development disorders. Here, we utilize mass-spectrometry-based proteomic analysis of EVs derived from umbilical cord blood plasma collected from 30 children diagnosed with non-syndromic ASD and 30 neurotypical controls.

The analysis identified 565 proteins with significantly different expression levels, most of which were more abundant in the ASD group. Notably, the protein expression variances were markedly lower in the ASD group, suggesting a similar cellular activity. Differentially expressed proteins were clustered using String software into 3 groups: mitochondria, endoplasmic reticulum (ER), and a mixture of immune and cytoskeletal proteins. Further statistical analysis identified 11 strongly predictive ASD proteins, while the Human Protein Atlas recognized an additional 13 brain-specific proteins.

A portion of these 24 proteins was associated with synaptogenesis and myelination. These findings suggest that, despite diverse etiologies, ASD may converge on a common final pathway involving mitochondrial and ER dysfunction, resulting in abnormal synaptogenesis. This study presents the first unbiased proteomic analysis of exosomal proteins aimed at determining whether neurodevelopmental disruptions linked to ASD originate prenatally or postnatally.