BACKGROUND/AIMS: Gastric inhibitory polypeptide is recognized as an acid inhibitor, while its relationship with Helicobacter pylori colonization is unknown. The present study measured serum gastric inhibitory polypeptide levels in patients after various types of gastric resection and the influence of demographic characteristics including Helicobacter pylori on serum gastric inhibitory polypeptide levels. METHODOLOGY: The study included twenty patients who underwent distal gastrectomy for duodenal ulcer, 33 patients who underwent radical subtotal gastrectomy for gastric carcinoma and 7 patients who underwent total gastrectomy. Another 58 healthy subjects served as controls. Their demographic characteristics were recorded, while serum gastric inhibitory polypeptide levels were measured using a homemade radioimmunoassay kit. RESULTS: The serum gastric inhibitory polypeptide levels in the three patient groups and the controls were 246.2+/-38.7 pg/ml, 201.7+/-30.9 pg/ml, 183.5+/-34.5 pg/ml and 202.6+/-14.0 pg/ml, respectively. The difference among the four groups was not significant. Neither age, gender, body mass index, smoking, Helicobacter pylori colonization nor type of gastrectomy had an influence on serum gastric inhibitory polypeptide levels in the controls and the three patient groups. However, elapsed time since operation in patients following total gastrectomy exhibited a significant positive correlation with their gastric inhibitory polypeptide levels (r=0.89, p<0.05). CONCLUSIONS: Serum gastric inhibitory polypeptide levels remain unchanged in patients undergoing various types of gastrectomy. Colonization of Helicobacter pylori does not influence its level. This peptide is probably less important in mediating gastric acid secretion.
BACKGROUND/AIMS: Gastric inhibitory polypeptide is recognized as an acid inhibitor, while its relationship with Helicobacter pylori colonization is unknown. The present study measured serum gastric inhibitory polypeptide levels in patients after various types of gastric resection and the influence of demographic characteristics including Helicobacter pylori on serum gastric inhibitory polypeptide levels. METHODOLOGY: The study included twenty patients who underwent distal gastrectomy for duodenal ulcer, 33 patients who underwent radical subtotal gastrectomy for gastric carcinoma and 7 patients who underwent total gastrectomy. Another 58 healthy subjects served as controls. Their demographic characteristics were recorded, while serum gastric inhibitory polypeptide levels were measured using a homemade radioimmunoassay kit. RESULTS: The serum gastric inhibitory polypeptide levels in the three patient groups and the controls were 246.2+/-38.7 pg/ml, 201.7+/-30.9 pg/ml, 183.5+/-34.5 pg/ml and 202.6+/-14.0 pg/ml, respectively. The difference among the four groups was not significant. Neither age, gender, body mass index, smoking, Helicobacter pylori colonization nor type of gastrectomy had an influence on serum gastric inhibitory polypeptide levels in the controls and the three patient groups. However, elapsed time since operation in patients following total gastrectomy exhibited a significant positive correlation with their gastric inhibitory polypeptide levels (r=0.89, p<0.05). CONCLUSIONS: Serum gastric inhibitory polypeptide levels remain unchanged in patients undergoing various types of gastrectomy. Colonization of Helicobacter pylori does not influence its level. This peptide is probably less important in mediating gastric acid secretion.