The inflammatory path toward type 1 diabetes begins during pregnancy

Area of Science:

• Immunology
• Metabolomics
• Environmental Health

Background:

• Type 1 diabetes (T1D) incidence is rising globally, but early biological risk factors remain unclear.
• Understanding early determinants is crucial for developing effective prevention strategies for T1D.
• Population-based birth cohort studies are vital for identifying pre-diagnostic risk factors.

Purpose of the Study:

• To identify early-life biological risk factors for Type 1 diabetes (T1D) in a general population.
• To investigate inflammatory and metabolic signatures at birth that predict future T1D diagnosis.
• To explore the role of environmental toxicants in T1D development.

Main Methods:

• Utilized the Swedish population-based ABIS birth cohort (n=16,683).
• Performed Olink proteomic analysis on neonatal blood samples (286 controls, 146 cases).
• Employed machine learning algorithms to identify predictive protein subsets for T1D.

Main Results:

• Differential protein abundance related to neutrophil migration, cytotoxicity, and immune regulation identified at birth.
• Several protein markers remained significant predictors despite accounting for family history and other factors.
• Identified associations with metabolites (stearic acid, lysine, glutamine) and toxicants (PFOS).
• A protein subset accurately predicted T1D (AUC=0.89±0.02), independent of HLA genetic risk.

Conclusions:

• Innate immune and tissue-remodeling pathways are perturbed at birth in individuals who later develop T1D.
• Early-life disruptions, including environmental exposures, may indicate beta-cell vulnerability.
• Non-invasive identification of these early disruptions at birth presents an opportunity for T1D prevention before autoimmune attack.