P Janssen1, S Verschueren, J Tack. 1. Translational Research Center for Gastrointestinal Disorders, University of Leuven, Leuven, Belgium.
Abstract
BACKGROUND: Different studies indicated a correlation between intragastric pressure (IGP) and satiation. Our aim was to investigate this correlation while artificially increasing the IGP. METHODS: In 12 fasted healthy volunteers an infusion catheter and a manometry probe were positioned intragastrically. Intragastric pressure was increased using a custom-made belt before or progressively during intragastric nutrient infusion. Nutrient drink (1.5 kcal mL(-1)) was intragastrically infused at 60 mL min(-1) . The subjects scored satiation using a 6-point Likert scale until maximum, when the infusion ended and the belt was released. Results are presented as mean ± S.E.M. and compared using a paired t-test. KEY RESULTS: When the belt was tightened before the nutrient infusion, fasting IGP was significantly increased (13.6 ± 1.3 vs 9.6 ± 0.9 mmHg; P < 0.05) but no differences in satiation could be observed. When progressively tightening the belt during nutrient infusion the IGP increased with 0.43 ± 0.04 mmHg per minute while in control experiments this was 0.28 ± 0.05 mmHg per minute (P < 0.01). During the latter experiment satiation linearly increased with 0.35 ± 0.03 and 0.29 ± 0.02 units per minute until maximal satiation (P < 0.01) while maximum volume consumed was 926 ± 66 and 1095 ± 82 mL when progressively increasing the IGP vs control respectively (P < 0.01). CONCLUSIONS & INFERENCES: These findings indicate that IGP per se does not affect satiation but that a gradual IGP increase during food intake is associated with decreased food intake, indicating that gastric accommodation is an important determinant of food intake.
BACKGROUND: Different studies indicated a correlation between intragastric pressure (IGP) and satiation. Our aim was to investigate this correlation while artificially increasing the IGP. METHODS: In 12 fasted healthy volunteers an infusion catheter and a manometry probe were positioned intragastrically. Intragastric pressure was increased using a custom-made belt before or progressively during intragastric nutrient infusion. Nutrient drink (1.5 kcal mL(-1)) was intragastrically infused at 60 mL min(-1) . The subjects scored satiation using a 6-point Likert scale until maximum, when the infusion ended and the belt was released. Results are presented as mean ± S.E.M. and compared using a paired t-test. KEY RESULTS: When the belt was tightened before the nutrient infusion, fasting IGP was significantly increased (13.6 ± 1.3 vs 9.6 ± 0.9 mmHg; P < 0.05) but no differences in satiation could be observed. When progressively tightening the belt during nutrient infusion the IGP increased with 0.43 ± 0.04 mmHg per minute while in control experiments this was 0.28 ± 0.05 mmHg per minute (P < 0.01). During the latter experiment satiation linearly increased with 0.35 ± 0.03 and 0.29 ± 0.02 units per minute until maximal satiation (P < 0.01) while maximum volume consumed was 926 ± 66 and 1095 ± 82 mL when progressively increasing the IGP vs control respectively (P < 0.01). CONCLUSIONS & INFERENCES: These findings indicate that IGP per se does not affect satiation but that a gradual IGP increase during food intake is associated with decreased food intake, indicating that gastric accommodation is an important determinant of food intake.
Authors: R H Hunt; M Camilleri; S E Crowe; E M El-Omar; J G Fox; E J Kuipers; P Malfertheiner; K E L McColl; D M Pritchard; M Rugge; A Sonnenberg; K Sugano; J Tack Journal: Gut Date: 2015-09-04 Impact factor: 23.059