Early postoperative enteral nutrition has repeatedly been described in the literature but has not found its place yet in everyday clinical life. We conducted perioperative intraduodenal glucose tolerance tests in 12 patients with a healthy metabolism who had to undergo moderately severe abdominal surgery. Our results suggest that the resorption is still markedly delayed 12 h postoperatively and that the hormonal regulation is also essentially disturbed. Therefore, we believe that enteral nutrition in the early postoperative period is beneficial only more than 24 h after surgery.
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Diabetes Obes Metab
December 2024
Adelaide Medical School and Centre of Research Excellence (CRE) in Translating Nutritional Science to Good Health, The University of Adelaide, Adelaide, South Australia, Australia.
Diabetologia
December 2024
Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia.
Aims/hypothesis: Quinine, when administered intraduodenally to activate bitter-taste receptors, in a dose of 600 mg, stimulates glucagon-like peptide-1 (GLP-1) and insulin, slows gastric emptying and lowers postprandial glucose in healthy people, with consequent implications for the management of type 2 diabetes; the effect of quinine on energy intake is uncertain. We have investigated the dose-related effects of quinine on postprandial blood glucose levels and energy intake in people with type 2 diabetes.
Methods: Male participants with type 2 diabetes (age: 68±5 years; HbA: 49.
Am J Clin Nutr
September 2024
Adelaide Medical School and Center of Research Excellence in Translating Nutritional Science to Good Health, University of Adelaide, Adelaide, Australia. Electronic address:
Background: In humans, intraduodenal infusion of L-tryptophan (Trp) increases plasma concentrations of gastrointestinal hormones and stimulates pyloric pressures, both key determinants of gastric emptying and associated with potent suppression of energy intake. The stimulation of gastrointestinal hormones by Trp has been shown, in preclinical studies, to be enhanced by extracellular calcium and mediated in part by the calcium-sensing receptor.
Objectives: This study aim was to determine whether intraduodenal calcium can enhance the effects of Trp to stimulate gastrointestinal hormones and pyloric pressures and, if so, whether it is associated with greater suppression of energy intake, in healthy males.
Diabetologia
July 2024
Adelaide Medical School and Centre of Research Excellence in Translating Nutritional Science to Good Health, The University of Adelaide, Adelaide, Australia.
Am J Clin Nutr
September 2023
Department of Surgery, Vanderbilt University Medical Center, Nashville, TN.
Background: Intestinal nutrient sensing regulates food intake and energy metabolism by acting locally and relaying nutritional status to the brain. It is unclear whether these mechanisms are altered in obese humans.
Objectives: We aimed to investigate differences in duodenal nutrient sensing in humans with or without obesity and the effects of transiently blocking vagal transmission on nutrient sensing, hunger, and appetite.
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