Hyperamylasemia in bulimia nervosa.

Area of Science:

• Biochemistry
• Psychiatry
• Clinical Medicine

Background:

• Bulimia nervosa is an eating disorder characterized by binge eating and compensatory behaviors like vomiting.
• Biomarkers are sought to objectively assess the severity and presence of behavioral disturbances in eating disorders.

Purpose of the Study:

• To evaluate the diagnostic value of total serum amylase and its isoenzymes (salivary and pancreatic) as biological markers for bulimia nervosa.
• To investigate the correlation between serum amylase levels and the frequency of binge eating and vomiting in patients with bulimia nervosa.

Main Methods:

• Serum amylase levels (total, salivary, and pancreatic isoenzymes) were measured in 40 patients diagnosed with bulimia nervosa and 25 healthy controls.
• Patients were part of a placebo-controlled trial for desipramine, a medication used to treat depression and eating disorders.

Main Results:

• Total and salivary amylase levels were significantly higher in patients with bulimia nervosa compared to controls.
• A significant correlation was found between the frequency of binge eating and vomiting and elevated salivary amylase levels.
• Serum amylase levels showed limited ability to differentiate between patients and controls, and the correlation with binge frequency was inconsistent in a subset of patients.

Conclusions:

• Hyperamylasemia is associated with bulimia nervosa, particularly elevated salivary amylase correlating with specific behaviors.
• Serum amylase measurements have limited clinical utility for the routine assessment and diagnosis of bulimia nervosa.
• Further research may be needed to identify more specific biomarkers for behavioral disturbances in bulimia nervosa.