Plasma Insulin-Like Growth Factor-Binding Protein-2 Levels Predict Severe Septic Acute Kidney Injury: A Mendelian...

Area of Science:

• Nephrology
• Critical Care Medicine
• Biomarker Discovery

Background:

• Sepsis-associated acute kidney injury (SA-AKI) lacks sensitive early detection biomarkers, leading to delayed intervention and increased mortality.
• Early identification of SA-AKI is crucial for timely treatment and improved patient outcomes.

Purpose of the Study:

• To investigate the association between insulin-like growth factor-binding protein-2 (IGFBP-2) levels and the incidence of sepsis-induced kidney injury.
• To evaluate a potential causal relationship between IGFBP-2 and SA-AKI using Mendelian randomization (MR) analysis.

Main Methods:

• A prospective cohort study of 79 sepsis patients in the Intensive Care Unit (ICU).
• Patients were categorized into SA-AKI and non-SA-AKI groups based on development within 48 hours of admission.
• Mendelian randomization and sensitivity analyses were performed to assess causality.

Main Results:

• IGFBP-2 demonstrated high diagnostic value for SA-AKI prediction (AUC=0.8994).
• Combined prediction using IGFBP-2, APACHE II, SOFA scores, and vasopressor use yielded an AUC of 0.9604.
• MR analysis found no causal relationship between genetically predicted IGFBP-2 levels and AKI (p=0.2995).

Conclusions:

• Plasma IGFBP-2 levels are predictive of SA-AKI in sepsis patients.
• Despite predictive value, MR analysis suggests no direct causal link between IGFBP-2 and septic kidney injury.
• Further research, including randomized controlled trials, is needed to elucidate underlying mechanisms.