Causal Structural Covariance Network Suggesting Structural Alterations Progression in Type 2 Diabetes Patients

Area of Science:

• Neuroscience
• Medical Imaging
• Endocrinology

Background:

• Type 2 diabetes (T2D) is recognized as a progressive condition.
• Previous research has not investigated the progressive brain structural changes associated with T2D.
• Understanding these changes is crucial for managing T2D complications.

Purpose of the Study:

• To determine if T2D patients exhibit progressive brain structural alterations.
• To elucidate the chronological progression of these alterations in the brain.

Main Methods:

• Structural MRI scans were acquired from 81 T2D patients and 48 healthy controls.
• Voxel-based morphometry (VBM) and causal structural covariance network (CaSCN) analyses were employed.
• Statistical analyses included two-sample t-tests with GRF correction for significance.

Main Results:

• Gray matter volume (GMV) alterations in T2D patients progressed with increasing disease duration.
• Early-stage T2D showed GMV atrophy in the right temporal pole.
• Later stages involved GMV alterations in the limbic system, cerebellum, subcortical, parietal, frontal, and occipital cortices.

Conclusions:

• Progressive GMV alterations in T2D follow a limbic-cerebellum-striatal-cortical sequence.
• Findings enhance understanding of T2D progression.
• Results may inform improved diagnosis and intervention strategies for T2D.