Autonomic dysfunction of gastric motility in major depression

Area of Science:

• Gastroenterology
• Psychiatry
• Neuroscience

Background:

• Major depressive disorder (MDD) is frequently associated with somatic symptoms, including gastrointestinal complaints.
• While cardiac symptoms are well-studied, gastrointestinal issues in MDD patients are common and linked to poorer outcomes.
• Research on gastric motility changes in MDD patients remains limited.

Purpose of the Study:

• To investigate gastric motility dysfunction in patients with MDD.
• To identify the relationship between gastrointestinal symptoms and MDD.
• To examine the influence of MDD duration and severity on gastric emptying.

Main Methods:

• Gastric emptying was assessed using a 13C-acetate breath test in 29 MDD patients and 51 healthy controls.
• Depression severity was measured using validated scales (HAMD-21, MADRS, BDI, CGI).
• Spearman's correlation analyzed the impact of MDD severity and duration on gastric emptying; autonomic complaints were also assessed.

Main Results:

• MDD patients exhibited significantly altered gastric emptying parameters (Tmax and T1/2b) compared to controls.
• A significant negative correlation was found between MDD severity (BDI, HAMD-21) and the maximum gastric emptying rate (Tmax).
• No correlation was observed between MDD duration and gastric emptying parameters.

Conclusions:

• Gastrointestinal motility is significantly impaired in MDD patients.
• The severity of MDD negatively correlates with the rate of gastric emptying.
• Autonomic nervous system dysfunction is a likely contributor to slowed gastric motility in MDD.