Paediatric anaesthesia & critical care

Biologic Mechanisms Underlying the Heterogeneous Response to Tight Glycemic Control among Differentially Inflamed Patients in the HALF-PINT Trial

Am J Respir Crit Care MedPublished Secondary analysis of the HALF-PINT randomised trial

Authors' conclusion

These findings expand our understanding of the biology underlying inflammatory subphenotypes and provide biologic insight into the mortality benefit of TGC in hyperinflammatory children.

Study context

Population
Hyperglycemic children with heart and lung failure (HALF-PINT participants)740 blood samples
Participants
293 children
Comparison
Hypoinflammatory vs Hyperinflammatory
  • Hypoinflammatoryn = 250reference
  • Hyperinflammatoryn = 43
Methodological detailsmechanistic, causal mediation analysis, plasma cytokines and whole-blood transcriptomics
  • Mechanistic
  • Causal mediation analysis
  • Plasma cytokines and whole-blood transcriptomics

Primary result

As reported in the abstract

Biologic response to TGC by subphenotype · Study Days 0, 2, and 4
  • Hyperinflammatory subphenotype: greater baseline expression of genes relating to inflammation, cell-cycle activity and immunometabolism
  • Hyperinflammatory treated to 80-110 mg/dl vs 150-180 mg/dl: greater reductions in inflammatory cytokines, innate immune and heme metabolism gene expression, and increased lymphocyte gene expression
  • Causal mediation: these changes partly explained the mortality benefit of tight glycemic control (TGC) in the hyperinflammatory subgroup

Original publication

Biologic Mechanisms Underlying the Heterogeneous Response to Tight Glycemic Control among Differentially Inflamed Patients in the HALF-PINT Trial. Am J Respir Crit Care Med. Published 1 August 2025. doi:10.1164/rccm.202409-1719oc

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