Dumping Syndrome Clinical Trial
Official title:
SOMATULINE Autogel 90 mg IN DUMPING SYNDROME
The purpose of this study is to assess if Somatuline autogel 90 mg is effective in the treatment of dumping syndrome.
Dumping syndrome has characteristic alimentary and systemic manifestations. It is one of the most common postprandial syndromes observed after extensive gastric surgery. Dumping syndrome can be separated into an early and late phase depending on the occurrence of symptoms in relation to the time elapsed after a meal. The early phase occurs because of rapid delivery of large amounts of osmotic active solids and liquids into the duodenum. The late phase is caused by a rapid increase of the glycemia and insuline causing hypoglycemia when the nutrients are not available any more. Dumping syndrome is the direct result of alterations in the storage function of the stomach and/or the pyloric emptying mechanism. Incidence and severity of symptoms in dumping syndrome are related directly to the extent of gastric surgery. An estimated 25-50% of all patients who have undergone gastric surgery have some symptoms of dumping. Only 1-5% are reported to have severe disabling symptoms. Incidence of significant dumping has been reported to be 6-14% in patients after truncal vagotomy and drainage and from 14-20% in patients after partial gastrectomy. Incidence of dumping syndrome after proximal gastric vagotomy without any drainage procedure is less than 2%. In the pediatric population, dumping syndrome is described in children who have undergone Nissen fundoplication. Several treatments can be proposed to a patient with dumping. Initially a diet of several small meals with a low concentration of mono-and disaccharides is prescribed and the patient is asked to avoid liquids during a meal. Several medical treatments can be utilized as guar gum, to increase the viscosity and reduce gastric emptying; pectine, to avoid a late hypoglycemia; acarbose, to block the digestion of saccharides. Some of them have only a partial effect or important side effects. Surgical interventions like an interposition of an antiperistaltic jejunal segment will reduce the intestinal motility or a Roux-en-Y construction can be created. These surgical interventions are sometimes necessary but remain quite invasive and not always useful. Somatostatin analogues have been used with success in patients with dumping syndrome. They exert a strong inhibitory effect on the release of insulin and several gut-derived hormones. The effectiveness of analogues in controlling the symptoms of both early and late dumping has been demonstrated in several randomized control trials. Somatostatin analogues interfere with the pathophysiology of a dumping syndrome in several ways. Somatostatin analogues reduce the secretion of insulin and prevents the occurrence of a late hypoglycaemia; decrease the concentration of different hormones responsible for the vaso-dilatation and the activation of the renin-angiotensine system that is seen in the early faze of the dumping syndrome. Somatostatin has also an effect on gastric motility and transit time. One of the main problems is the high cost and daily subcutaneous administration of somatostatin analogues . Somatuline® Autogel is a slow-release formulation that requires only monthly injection and supply high-dose, stable serum levels of lanreotide. These agents provide improved patient compliance since they are administered on a monthly schedule. The purpose of this study is to assess if Somatuline autogel 90 mg is effective in the treatment of dumping syndrome. This will be a 27 weeks double blinded placebo-controlled cross-over multicenter study assessing the effect of Somatuline 90 mg in patients with dumping syndrome. Reports on the therapeutic effectiveness of lanreotide in the management of dumping symptoms are scarce and based on small numbers of patients. Data on the effect of lanreotide in the treatment of dumping are missing. In this trial, all patients will be treated with Somatuline ® Autogel 90 mg. From a pharmacokinetic point of view, all patients will have reached steady state concentration of lanreotide after 12 weeks of treatment. After 12 weeks, a wash-out period of 4 weeks is inserted before patients will be crossed over to placebo or active treatment at week 16. ;
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