T2D Blood Neutrophil and ER-Stress Signature
Tkachenko et al. 2025 report that blood RNA-seq meta-analysis in type 2 diabetes highlights immune and stress-response pathways, especially neutrophil-associated compartments and ER-stress-related pathways.
Key Ideas
- Meta-analysis DEGs were enriched for neutrophil degranulation, p53-mediated transcriptional regulation, TNF-alpha signaling, oxidative phosphorylation, electron transport, mTOR signaling, cell division, and chromatin organization.
- Integration-driven discovery genes were enriched for vacuolar membrane, lytic vacuole membrane, and azurophil granule membrane terms.
- The authors interpret azurophil-granule and vacuolar-membrane enrichment as consistent with neutrophil effector function.
- The authors highlight ERAD-related IDD genes, including EDEM3, GET4, JKAMP, MAN1C1, RCN3, RHBDD2, and SELENOS.
- The authors argue that ERAD and mTOR pathway signals may be relevant T2D biomarkers despite low fold changes.
PBMC Interpretation Caution
- Neutrophil-associated signals are easier to interpret in whole blood than in PBMC, because mature neutrophils are not part of the classic PBMC compartment.
- If this project’s PBMC data show neutrophil-like or granulocyte-associated signatures, they may reflect low-density granulocytes, doublets, ambient RNA, contamination, or indirect immune signaling and should be validated carefully.
- ER-stress, mTOR, oxidative-stress, and RNA-splicing signals can be relevant to PBMC biology even when neutrophil-specific signals are not directly transferable.
Genes Mentioned as Potentially Relevant
- Concordant individual-study DEGs: FBLN2, TPCN1, PC, SHANK1, and PLD4.
- Same-direction genes across all eight datasets: LOC112268118, MPO, IL18BP, DELE1, TSPAN32, ITFG2, and NISCH.
- Additional diabetes-relevant genes discussed in the paper include GREM2, LY75, FOXRED2, NEK7, CPNE3, C1QTNF12, MTHFR, ZNF496, PM20D2, PALD1, and KAT5.