Type 2 diabetes mellitus moderates the relationship between interleukin-8 and Alzheimer's disease pathology in mild cognitive impairment
This study analyzed 373 mild cognitive impairment participants to investigate how type 2 diabetes modifies the association between baseline plasma IL-8 levels and cognitive decline, amyloid pathology, and neurodegeneration. Results showed that in the T2DM group, higher IL-8 was associated with slower clinical decline, lower hippocampal amyloid burden, and reduced brain atrophy, suggesting IL-8's role is context-dependent and may reflect an adaptive immune response under metabolic stress.