Utility of Extracellular Nicotinamide Phosphoribosyl Transferase as a Novel Biomarker in Predicting Early Severe Organ Dysfunction and Mortality in Acute Respiratory Distress Syndrome: A Prospective Observational Study

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Background and aim: Nicotinamide phosphoribosyl transferase (NAMPT) is an upstream cytozyme (cytokine plus enzyme) with unique features, having intracellular NAMPT (iNAMPT) and extracellular NAMPT (eNAMPT) components. Genetic associations and therapeutic inhibition highlight its potential as both a biomarker and therapeutic target. We aimed to study the utility of eNAMPT as a predictor of severe organ dysfunction and its association with mortality in acute respiratory distress syndrome (ARDS). Patients and methods: This is a single-center, prospective observational study involving 90 patients with ARDS. We noted plasma eNAMPT levels, oxygenation levels, inflammatory markers, lung ultrasound scores, driving pressures, and echocardiography parameters. Severity of organ dysfunction and ICU mortality were the outcomes. Conclusion: Plasma eNAMPT (≥4.38 ng/mL) predicts early severe organ dysfunction in ARDS patients. It is also associated with mortality and a shorter median survival time. How to cite this article: Utility of Extracellular Nicotinamide Phosphoribosyl Transferase as a Novel Biomarker in Predicting Early Severe Organ Dysfunction and Mortality in Acute Respiratory Distress Syndrome: A Prospective Observational Study. Indian J Crit Care Med 2025;29(12):1010-1019.