Cord-Blood Lipidome in Progression to Islet Autoimmunity and Type 1 Diabetes

Area of Science:

• Metabolomics
• Pediatric Endocrinology
• Immunology

Background:

• Altered serum lipid profiles at birth are associated with later progression to type 1 diabetes (T1D).
• Understanding early lipidomic differences may identify infants at high risk for T1D.

Purpose of the Study:

• To compare cord blood lipidomic profiles in infants who progress to T1D, those who develop autoantibodies without T1D, and healthy controls.
• To identify specific lipids and lipid signatures predictive of T1D progression.

Main Methods:

• Cord blood samples were analyzed for lipidome composition.
• Three groups were studied: progressors to T1D (PT1D), autoantibody-positive non-progressors (P1Ab), and controls (CTR).
• Statistical analysis and receiver operating characteristic (ROC) curve analysis were used to identify predictive lipid signatures.

Main Results:

• Phospholipids, particularly sphingomyelins, were significantly lower in PT1D infants compared to P1Ab and CTR groups.
• Cholesterol esters were elevated in the PT1D group relative to the other groups.
• A five-lipid signature achieved an area under the ROC curve (AUROC) of 0.83 for predicting T1D progression.

Conclusions:

• Cord blood lipidomic profiles at birth differ between infants who progress to T1D and those who do not.
• Specific lipid alterations, including sphingomyelins and cholesterol esters, are associated with future T1D development.
• Early lipidomic profiling shows promise for predicting type 1 diabetes risk in newborns.