To investigate the association between plasma cholesterol levels and survival in sepsis, specifically exploring the mechanisms by which elevated cholesterol confers protection.
Key Findings:
Survivors had higher cholesterol levels (median 135 mg/dL) compared to non-survivors (126 mg/dL; p < 0.001).
High cholesterol (≥133 mg/dL) was linked to reduced 28-day mortality (adjusted HR = 0.80; 95% CI: 0.67–0.95; p = 0.012).
Mice on HCD showed improved survival rates (52.5% to 90%) and metabolic reprogramming, including enhanced oxidative phosphorylation and antioxidant pathways.
Interpretation:
Elevated plasma cholesterol levels are associated with improved survival in sepsis, likely through promoting hepatic metabolic changes rather than broad immune activation, highlighting the need for further investigation into these mechanisms.
Limitations:
The study is retrospective and relies on data from a single database, which may limit generalizability.
Causality in human subjects cannot be definitively established from observational data, necessitating further research.
Conclusion:
Targeting hepatic bioenergetics may offer new therapeutic strategies for improving outcomes in sepsis, warranting further exploration in clinical settings.
