Body composition in affective disorder before, during, and after lithium carbonate therapy

Area of Science:

• Psychiatry
• Biochemistry
• Physiology

Background:

• Mood disorders like bipolar disorder are associated with physiological changes.
• Understanding body composition can offer insights into the pathophysiology of mood disorders.

Purpose of the Study:

• To compare body composition, specifically water and electrolyte content, between patients with unipolar/bipolar depression and healthy controls.
• To investigate the effects of lithium carbonate therapy on body composition in bipolar patients.

Main Methods:

• Body composition analysis was performed on 3 unipolar and 17 bipolar patients during depressive states and compared to 48 controls.
• Electrolyte concentrations (sodium, potassium) and water distribution (extracellular vs. intracellular) were measured.
• Six patients underwent body composition analysis before, during, and after lithium carbonate treatment.

Main Results:

• Male bipolar patients had a significantly lower extracellular to intracellular water ratio than male controls.
• All patients exhibited higher residual sodium concentrations compared to controls.
• Lithium treatment led to decreased body weight and water content, with increased residual sodium upon discontinuation.

Conclusions:

• Altered body water and sodium balance may be linked to the pathophysiology of bipolar disorder.
• Lithium carbonate therapy influences body composition, necessitating monitoring of water and electrolyte levels.