Analysis of Hair Trace Elements in Children with Autism Spectrum Disorders and Communication Disorders

Area of Science:

• Pediatric Medicine
• Environmental Health
• Neurodevelopmental Disorders

Background:

• Communication disorder (CD) and autism spectrum disorder (ASD) are neurodevelopmental conditions impacting children.
• Altered trace element levels in hair have been implicated in various neurodevelopmental disorders.
• Hair analysis offers a non-invasive method to assess long-term exposure and metabolic handling of elements.

Purpose of the Study:

• To analyze and compare hair trace element content in children diagnosed with CD and ASD against a control group.
• To investigate age-related differences in trace element profiles within these pediatric groups.
• To explore potential correlations between specific trace elements and the pathophysiology of CD and ASD.

Main Methods:

• Inductively coupled plasma mass spectrometry (ICP-MS) was utilized for precise quantification of hair trace elements.
• A cohort of 99 children, including control, CD, and ASD groups (n=33 each), was recruited.
• Participants were stratified into age subgroups (3-4 years and 5-8 years) for detailed analysis.

Main Results:

• Children with CD exhibited significantly higher hair levels of lithium, selenium, arsenic, beryllium, and cadmium compared to controls.
• The ASD group showed a tendency towards lower hair copper, iodine, and beryllium, but elevated selenium, iron, and aluminum.
• Age-specific differences were noted, with CD showing more pronounced alterations in older children and ASD in younger children.

Conclusions:

• Hair trace element analysis reveals distinct elemental profiles in children with CD and ASD.
• Elevated levels of certain toxic elements in CD and altered metal handling in ASD suggest a role in their respective conditions.
• Findings indicate that children with ASD may have more significant disruptions in metal metabolism and excretion compared to those with CD.