Children's erythrocyte fatty acids are associated with the risk of islet autoimmunity

Area of Science:

• Nutritional immunology
• Pediatric endocrinology
• Metabolomics

Background:

• Islet autoimmunity is the primary driver of type 1 diabetes.
• Early life factors influencing islet autoimmunity risk are not fully understood.
• Erythrocyte fatty acid profiles reflect long-term dietary intake and metabolic status.

Purpose of the Study:

• To examine the association between erythrocyte fatty acid composition and the risk of developing islet autoimmunity in high-risk children.
• To identify specific fatty acids that may serve as early biomarkers for islet autoimmunity.
• To explore the potential protective or risk-associated roles of different fatty acid classes.

Main Methods:

• Utilized a nested case-control design within the large prospective Environmental Determinants of Diabetes in the Young (TEDDY) cohort study.
• Analyzed erythrocyte fatty acid composition from infancy (3 months) up to 6 years of age.
• Employed conditional logistic regression, adjusting for key genetic and demographic factors (HLA genotype, ancestry, weight z-score).

Main Results:

• Elevated levels of eicosapentaenoic acid and docosapentaenoic acid (n-3 polyunsaturated fatty acids) in infancy were linked to a reduced risk of islet autoimmunity.
• Conjugated linoleic acid intake after infancy was also associated with lower islet autoimmunity risk.
• Higher concentrations of certain even-chain saturated fatty acids (SFAs) and monounsaturated fatty acids (MUFAs) were associated with an increased risk of islet autoimmunity.

Conclusions:

• Erythrocyte fatty acid profiles in early life are associated with islet autoimmunity risk in children.
• Omega-3 polyunsaturated fatty acids (n-3 PUFAs) may play a protective role against islet autoimmunity.
• Specific SFAs and MUFAs may be indicative of an increased susceptibility to islet autoimmunity, suggesting potential dietary interventions.