T2D Research

T2D T-Cell Immunometabolic Subtypes

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tagsconcept, type-2-diabetes, pbmc, immunology, transcriptomics
aliasesT2D T-Cell Immunometabolic Subtypes

3 min read

T2D T-Cell Immunometabolic Subtypes

Li et al. 2025 define paper-specific T2D subtypes from metabolic pathway activity in T-cell subpopulations, using GSVA scores over 42 KEGG metabolic pathways and consensus clustering.

Subtype Definition

  • Li et al. 2025 calculated mean GSVA pathway scores for each sample across T-cell subpopulations.
  • Li et al. 2025 tested consensus clustering from k = 2 through k = 9 and selected k = 4 by the delta-area elbow method.
  • Li et al. 2025 separated the four groups into T2D subtypes A, B, and C plus healthy-control group D.
  • Li et al. 2025 report group A contained 12 T2D patients, group B contained 14 T2D patients, group C contained 12 T2D patients, and group D contained 11 healthy controls.
  • Li et al. 2025 also report 37 T2D patients overall, but the subtype counts A=12, B=14, and C=12 sum to 38, so the exact sample count per subtype needs source-level checking before manuscript use.

Metabolic Patterns

  • Li et al. 2025 report subtype A showed elevated lipid, amino-acid, xenobiotic/drug metabolism, and carbohydrate-related pathways, including sphingolipid, tryptophan, arachidonic-acid, and starch/sucrose metabolism.
  • Li et al. 2025 report subtype B showed higher pyruvate, glutathione, nucleotide, nitrogen, inositol phosphate, glycerolipid, glycerophospholipid, fructose/mannose, and amino-sugar metabolism pathways.
  • Li et al. 2025 report subtype C shared several subtype B metabolic themes but showed a more restricted metabolic shift.
  • Li et al. 2025 report healthy-control group D showed stronger baseline energy-homeostasis pathways, including pyruvate, glutathione, purine, pyrimidine, fatty-acid, propanoate, butanoate, and beta-alanine metabolism.

Immune Differences Across Subtypes

  • Li et al. 2025 report groups A and healthy controls had higher central memory CD8+ T-cell proportions.
  • Li et al. 2025 report groups A and C had lower cytotoxic CD8+ T-cell proportions than healthy controls.
  • Li et al. 2025 report group C showed lower memory and naive CD8+ T-cell proportions and lower regulatory CD4+ T-cell proportions.
  • Li et al. 2025 report group B had lower classical monocyte proportions, while groups A and B had higher intermediate monocyte proportions than healthy controls.

Interpretation

  • These subtype labels are useful for organizing T2D PBMC immunometabolic heterogeneity, but they are not yet clinically validated categories.
  • Because the healthy controls came from a different accession than the T2D samples, subtype separation should be interpreted with attention to residual dataset effects.
  • For the manuscript, this concept supports the idea that T2D immune changes may vary by metabolic state within immune cells, which could modify apparent ancestry or cohort effects.

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