Pparγ Expression in T Cells as a Prognostic Marker of Sepsis

Shock
Marco BrenneisAndreas von Knethen

Abstract

Translating murine data to the human situation, we proposed that the level of peroxisome proliferator-activated receptor γ (PPARγ) expression in T cells from septic patients correlates with clinical outcome. In this preliminary report, we analyzed PPARγ mRNA expression in CD3 T cells derived from blood of a very small number of septic patients (n = 18) on various days up to 2 weeks after the initial diagnosis. CD3 T cell count was determined by flow cytometry. T cells from n = 11 healthy donors were included as controls. Maximal PPARγ mRNA expression was observed on the day of sepsis diagnosis (day 0; 5,896 ± 1,523 copies PPARγ mRNA/25 ng mRNA, P < 0.05 vs. controls). In contrast, the number of CD3 T cells was significantly decreased in septic patients compared with healthy controls (296 ± 31 vs. 1,803 ± 134 T cells/μL blood, P < 0.001). Setting two arbitrary limits: patients with a PPARγ expression in T cells higher than 7,000 copies/25 ng mRNA, of whom five of six patients died during the ICU stay, and patients with a T cell count below 100 T cells/μL blood, of whom five of eight patients died, we identified a correlation between sepsis survival and low T cell number, paired with high T cell-specific PPARγ expression. Among a...Continue Reading

References

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