Macrophage Migration Inhibitory Factor as a Potential Biomarker in Acetaminophen Overdose: A Pilot Study.

Area of Science:

• Toxicology
• Biochemistry
• Emergency Medicine

Background:

• Acetaminophen overdose is a primary cause of acute liver failure in the U.S.
• Macrophage migration inhibitory factor (MIF), a cytokine, exacerbates acetaminophen-induced toxicity in preclinical studies.
• MIF's potential as an early biomarker in emergency department (ED) settings for acute acetaminophen overdose warrants investigation.

Purpose of the Study:

• To assess the feasibility of measuring MIF in ED patients with suspected acute acetaminophen overdose.
• To determine if MIF serum concentrations are elevated in patients with confirmed acetaminophen overdose compared to controls.
• To explore MIF's potential as a diagnostic biomarker for acetaminophen toxicity.

Main Methods:

• A convenience sample of 13 ED patients with suspected acute overdose was enrolled.
• Waste specimens were collected for MIF analysis.
• Patients were categorized into confirmed acetaminophen overdose (n=9), no acetaminophen exposure/liver injury (n=3), and liver injury without acetaminophen (n=1).

Main Results:

• All nine patients in the acetaminophen group had detectable acetaminophen levels.
• Median MIF serum concentration was significantly higher in the acetaminophen overdose group (16.08 ng/mL) compared to the control group (0.19 ng/mL) (p=0.0091).
• MIF measurement was feasible in ED drug overdose specimens.

Conclusions:

• MIF can be feasibly measured in specimens from emergency department drug overdose patients.
• Serum MIF levels were significantly elevated in patients with acetaminophen overdose.
• MIF demonstrates potential as a valuable biomarker for early detection of acetaminophen overdose in the ED.