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Abnormal fatty acids in Canadian children with autism
1Guelph, Ontario N1G 2X6, Canada.
Insights
Canadian children with autism show abnormal fatty acid levels in red blood cells and serum. These findings highlight potential differences in essential fatty acid status in autism, particularly docosahexaenoic acid and arachidonic acid.
Area of Science:
- Neuroscience
- Biochemistry
- Pediatrics
Background:
- Fatty acids are crucial for neurodevelopment.
- Autism spectrum disorder (ASD) is associated with abnormal fatty acid metabolism, but findings are inconsistent.
- Limited data exists on fatty acid status in Canadian children with ASD.
Purpose of the Study:
- To investigate red blood cell and serum fatty acid status in Canadian children with ASD.
- To identify specific fatty acid abnormalities in this population.
- To provide data for improved cross-study comparisons in autism research.
Main Methods:
- Study included 11 Canadian children diagnosed with ASD and 15 typically developing controls.
- Participants had no recent medication, supplements, specialty diets, or recent illnesses.
- Red blood cell and serum samples were analyzed for fatty acid composition.
Main Results:
- Children with ASD had significantly lower red blood cell levels of docosahexaenoic acid (DHA), eicosapentaenoic acid (EPA), and arachidonic acid (AA).
- Lower omega-3/omega-6 ratios were observed in the red blood cells of children with ASD.
- Serum analysis revealed lower levels of DHA, AA, and linoleic acid in the ASD group compared to controls.
Conclusions:
- Abnormalities in both serum and red blood cell fatty acids were detected in Canadian children with ASD.
- These findings suggest a potential role for fatty acid dysregulation in the complex etiology of autism.
- Larger, age- and sex-matched studies are needed to confirm these results and explore potential interventions.
Objective:
Fatty acids are critical for pediatric neurodevelopment and are abnormal in autism, although prior studies have demonstrated conflicting results and methodological differences. To our knowledge, there are no published data on fatty acid in Canadian children with autism. The aim of this study was to investigate red blood cell and serum fatty acid status to identify whether abnormalities exist in Canadian children with autism, and to enhance future cross-study comparison.
Methods:
Eleven Canadian children with autism (3 girls, 8 boys; age 3.05 ± 0.79 y) and 15 controls (9 girls, 6 boys; age 3.87 ± 1.06 y) met inclusion criteria, which included prior Diagnostic and Statistical Manual diagnosis of autism spectrum disorder, no recent medication or supplements, no specialty diets, and no recent illness.
Results:
The children with autism demonstrated lower red blood cell docosahexaenoic acid (P < 0.0003), eicosapentaenoic acid (P < 0.03), arachidonic acid (P < 0.002), and ω-3/ω-6 ratios (P < 0.001). They also demonstrated lower serum docosahexaenoic acid (P < 0.02), arachidonic acid (P < 0.05), and linoleic acid (P < 0.02) levels.
Conclusions:
Fatty acids in both serum and red blood cells were abnormal in this small group of Canadian children with autism than in controls, underlining a need for larger age- and sex-matched investigations in this community. A potential role for fatty acid abnormalities within the complex epigenetic etiology of autism is proposed in relation to emerging understanding of relationships between cobalamin metabolism, gut microbiota, and propionic acid production.
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