Enzymatic/Mitochondrial Import Bottleneck in Sepsis with Possible Extensions to DIC: IV Glutathione and Hinokitiol as Potential Therapeutic Candidates

Sepsis-induced disseminated intravascular coagulation (DIC) carries approximately 44% mortality and has no targeted mechanistic therapy. Stable isotope tracer data show whole-blood glutathione (GSH) synthesis falling by approximately 60% in sepsis despite paradoxically elevated cysteine flux, consistent with enzymatic failure at the glutamate-cysteine ligase (GCL) step rather than substrate shortage. We propose that GCL failure may unify endothelial coagulopathy and innate immune dysfunction in DIC, linked to the NLRP3/GSDMD pyroptotic coagulation pathway through both cytosolic synthesis and mitochondrial import failure. Cross-dataset bioinformatic analysis was conducted across four independent GEO datasets. Three whole-blood cohorts (n = 200; 144 sepsis, 56 controls; two platforms) were selected for this study (two adult cohorts and one pediatric cohort). All cohorts were strictly filtered to day 1 baseline samples to prevent pseudoreplication. Differential expression was evaluated via Mann–Whitney U with Benjamini–Hochberg correction, with xCell deconvolution resolving bulk signals into cell-type-specific components via Spearman’s correlation. Mitochondrial GSH transporter and receptor-mediated mitophagy genes were evaluated using the same pipeline as an independent evidential layer. A fourth dataset of isolated monocytes (GSE46955; n = 14 individuals, 22 samples) was analyzed to assess AFG3L2 and SLC25A39 co-transcription. Across cohorts, NLRP3 transcript abundance positively correlated with monocyte and neutrophil enrichment scores (e.g., rho = +0.633 and +0.537). Conversely, transcripts for GCLC (rho = −0.530) and SLC25A39 (rho = −0.400), the principal mitochondrial GSH importer, inversely correlated with these same myeloid population scores. Furthermore, the receptor-mediated mitophagy transcripts FUNDC1 and BNIP3L were significantly downregulated and inversely correlated with expanding myeloid fractions. These bulk transcriptomic patterns reveal a strong inverse relationship between the expression of inflammasome components and GSH synthesis, import, and clearance machinery, though further studies are required to confirm functional protein activation or enzymatic failure. Longitudinal analysis of isolated monocytes, utilizing a linear mixed-effects model to account for repeated within-patient sampling, demonstrated significant aggregate co-transcription between AFG3L2 and SLC25A39 (p = 0.012), indicating tight co-regulation of the importer and its protease. These findings, derived from sepsis-versus-control cohorts without DIC adjudication, suggest that the transcriptional suppression of GSH synthesis and mitochondrial import machinery correlates strongly with NLRP3 and GSDMD transcript upregulation in estimated myeloid populations. Extending this axis to a mechanistic role in DIC is a hypothesis supported by the independent literature, not a direct finding of the present dataset. Because this bottleneck appears enzymatic rather than substrate-dependent, N-acetylcysteine alone may be insufficient to restore homeostasis. We therefore hypothesize that combining intravenous glutathione with an Fe–S cluster-promoting agent, such as hinokitiol, could mechanistically address these findings. However, this remains strictly a preclinical hypothesis that requires extensive investigation to resolve existing safety concerns, particularly the potential for ionophore toxicity in humans.