by Prateek Chopra | June 25, 2026 | Diabetes Conferences | ADA 2026
Research Objective
- This study investigated metabolic trajectories preceding the onset of type 2 diabetes (T2D) among distinct high-risk subphenotypes.
- The aim was to better understand how differences in insulin sensitivity, beta-cell function, and body fat distribution contribute to diabetes development.
Methods
- Individuals at elevated risk of T2D from the TUEF/TULIP cohort in Germany who subsequently developed diabetes were included.
- Participants underwent:
- Serial 75-g oral glucose tolerance tests (OGTTs).
- Whole-body MRI for assessment of body fat distribution.
- Proton magnetic resonance spectroscopy for liver fat quantification.
- Insulin sensitivity and beta-cell function indices were derived from OGTT data.
High-Risk Metabolic Clusters
- Cluster C3: Reduced beta-cell function.
- Cluster C5: High visceral fat, high liver fat, and marked insulin resistance.
- Cluster C6: High visceral fat and elevated insulin secretion.
Study Population
- C3: 162 participants.
- C5: 148 participants.
- C6: 48 participants.
- Mean observation period before T2D diagnosis: 3.5 ± 3.7 years.
Changes in Insulin Sensitivity
- Insulin sensitivity declined significantly in:
- C3 (p<0.046).
- C6 (p<0.018).
- No significant decline was observed in C5 (p=0.299).
Changes in Beta-Cell Function
- The greatest deterioration was observed in C5 (p<0.001).
- A modest decline occurred in C3 (p=0.004).
- Beta-cell function remained stable in C6 (p=0.501).
Adiposity Trajectories
- Neither visceral fat nor liver fat changed significantly within individual clusters over time.
- However, visceral fat accumulated more rapidly in C5 than in C3:
- Slope: 0.058 vs 0.039 (p=0.031).
Clinical Implications
- The biological pathways leading to T2D differ substantially among high-risk individuals.
- Some subgroups are characterized primarily by declining insulin sensitivity, whereas others exhibit accelerated beta-cell dysfunction.
- Recognition of these distinct trajectories may support more personalized diabetes prevention strategies.
High-risk metabolic subphenotypes follow different pathways toward the development of T2D. While progressive insulin resistance predominates in some individuals, accelerated beta-cell deterioration drives diabetes onset in others, highlighting the need for tailored prevention approaches based on underlying metabolic characteristics.