A Clinical Study of Urine Amino Acids in Children with Autism Spectrum Disorder

Area of Science:

• Biochemistry
• Neuroscience
• Genetics

Background:

• Amino acids are vital organic compounds for protein structure and bodily functions.
• The precise role of amino acids in the development of autism spectrum disorder (ASD) requires further investigation.
• Understanding these biochemical pathways could offer new insights into ASD etiology.

Purpose of the Study:

• To investigate potential correlations between specific amino acids and their derivatives in urine and the presence of autism spectrum disorder (ASD).
• To explore differences in urinary amino acid profiles between children with ASD and neurotypical children.

Main Methods:

• A case-control study involving 75 children aged 2-12 years.
• Urine samples were collected and analyzed for amino acid profiles using liquid chromatography-tandem mass spectrometry (LC-MS/MS).

Main Results:

• Children with ASD exhibited higher levels of glutamine, hydroxyproline, tyrosine, aspartic acid, and tryptophan, and lower levels of serine compared to controls.
• Boys with ASD showed elevated serine, threonine, and aspartic acid.
• Significant differences in amino acid levels were observed in children under 5 years, with higher histidine, threonine, valine, methionine, aspartic acid, glutamic acid, alpha amino-adipic acid, sarcosine, alanine, and beta-alanine, and lower proline in the ASD group.

Conclusions:

• The study findings support the hypothesis that amino acids may be implicated in the expression of autism spectrum disorder (ASD).
• Further research is warranted to elucidate the specific mechanisms linking amino acid metabolism and ASD.
• These findings could pave the way for novel diagnostic or therapeutic strategies.