Gastrointestinal transit in patients with systemic sclerosis

Area of Science:

• Gastroenterology
• Autoimmune Diseases
• Clinical Physiology

Background:

• Systemic sclerosis (SSc) is an autoimmune disease causing fibrosis.
• Gastrointestinal (GI) symptoms like abdominal pain are common in SSc but poorly understood.
• The pathophysiology of diffuse abdominal symptoms in SSc requires investigation.

Purpose of the Study:

• To investigate the pathophysiology of abdominal pain and discomfort in individuals with SSc.
• To evaluate small intestinal motility and gastrointestinal transit time in SSc patients.

Main Methods:

• 15 SSc patients with diffuse abdominal symptoms and 17 healthy controls were studied.
• Motility Tracking System (MTS-1) measured gastric emptying (GE) and small intestinal velocity.
• Hydrogen breath tests assessed bacterial overgrowth; radiopaque markers determined gastrointestinal transit time (GITT).

Main Results:

• SSc patients exhibited significantly reduced proximal small intestinal velocity compared to controls (p=0.02).
• Prolonged GE occurred in 27% of SSc patients (p=0.04).
• Slow small intestinal transit correlated with prolonged GITT (>3 days in 53% of patients).

Conclusions:

• Reduced velocity through the small intestine is a key finding in SSc patients with abdominal symptoms.
• Altered small intestinal motility may contribute to GI dysfunction in systemic sclerosis.