Serum and urinary myoglobin in alcoholics

Area of Science:

• Biochemistry
• Clinical Chemistry
• Nephrology

Background:

• Alcoholism is associated with various health complications.
• Myoglobin is a protein found in muscle tissue.
• Serum myoglobin levels can indicate muscle damage or other physiological changes.

Purpose of the Study:

• To investigate serum myoglobin levels in male alcoholics.
• To explore the relationship between alcohol consumption, myoglobin levels, and potential underlying causes.
• To assess myoglobinuria and its association with renal tubular function in alcoholics.

Main Methods:

• Serum myoglobin levels were measured in 106 male alcoholics.
• Patients were categorized based on recent alcohol intake and clinical status.
• Serial myoglobin levels were monitored in patients after cessation of heavy drinking.
• Serum creatine kinase (CK), glomerular filtration rate, and electrolytes were assessed.
• Urinary myoglobin and beta 2-microglobulin excretion were analyzed.

Main Results:

• 31% of alcoholics with recent abstinence had subnormal myoglobin levels.
• 18% of alcoholics with current alcohol intake had elevated myoglobin levels.
• Five patients showed marked myoglobin elevations after heavy drinking, normalizing within 4-7 days without clinical myopathy.
• No correlation was found between serum myoglobin and impaired kidney function, liver disease markers, or electrolyte imbalances.
• Transient myoglobinuria with increased beta 2-microglobulin was observed in two patients, suggesting minor tubular dysfunction.

Conclusions:

• Serum myoglobin abnormalities are common in male alcoholics, irrespective of recent alcohol intake or clinical signs of myopathy.
• Elevated myoglobin levels in alcoholics can be transient and may normalize with abstinence.
• Myoglobinuria in some alcoholics with recent heavy drinking might stem from transient renal tubular dysfunction.