Faecal bile acid excretion in diverticular disease

Area of Science:

• Gastroenterology
• Digestive Physiology

Background:

• Diverticular disease is a common gastrointestinal condition.
• Alterations in bile acid metabolism and colonic motility are implicated in its pathogenesis.

Purpose of the Study:

• To investigate fecal bile acid excretion and sigmoid myoelectrical activity in patients with diverticular disease.
• To compare these parameters with healthy controls and assess the effect of bran treatment.

Main Methods:

• Measurement of fecal bile acid concentrations (deoxycholic and lithocholic acid) over 12 months.
• Assessment of sigmoid myoelectrical activity (frequency and rhythm).
• Comparison between 21 diverticular disease patients and 17 age-matched controls, with follow-up after bran therapy.

Main Results:

• Significantly lower fecal deoxycholic and lithocholic acid levels in diverticular disease patients compared to controls (P < 0.001).
• Abnormally rapid sigmoid myoelectrical rhythm (0.2-0.3 Hz) observed in patients, which improved after one year of bran treatment.
• Significant correlations found between specific bile acid concentrations and myoelectrical activity frequencies.

Conclusions:

• Diverticular disease is associated with reduced fecal bile acid concentrations.
• Altered colonic bile acid absorption may influence sigmoid myoelectrical activity in diverticular disease.
• Bran supplementation may offer a therapeutic benefit by normalizing these physiological parameters.