Enterokinase activity in human intestinalized gastric mucosa

Area of Science:

• Gastroenterology
• Cell Biology
• Histopathology

Background:

• Intestinal metaplasia (IM) is a condition where gastric mucosa cells transform into cells resembling intestinal epithelium.
• The functional capacity of these metaplastic cells remains incompletely understood.
• Enterokinase is a key enzyme typically found in the small intestine.

Purpose of the Study:

• To investigate the presence and activity of enterokinase in gastric biopsies.
• To explore the functional potential of intestinalized brush border cells in gastric mucosa.

Main Methods:

• Biopsies were obtained from 6 patients undergoing gastroscopy.
• Patients had confirmed extended intestinal metaplasia of the gastric mucosa.
• Enterokinase activity was assayed in the collected tissue samples.

Main Results:

• Enterokinase activity was successfully demonstrated in the gastric biopsies.
• The findings indicate the presence of functional enterokinase in intestinalized gastric cells.
• This activity supports the concept of regained intestinal epithelium characteristics.

Conclusions:

• Intestinalized brush border cells in gastric mucosa exhibit enterokinase activity.
• These cells may possess the original absorptive and secretory capacities of true intestinal epithelium.
• Gastric intestinal metaplasia may involve a partial restoration of intestinal cell function.