YF476 and Type I Gastric Carcinoids (Norway)
YF476 and Type I Gastric Carcinoids (Norway)
The aim of the study is to find out if the experimental medicine, YF476, can make gastric
 carcinoids, a rare type of stomach tumour, shrink and disappear. Gastric carcinoids occur
 mainly in patients with chronic atrophic gastritis (CAG), a condition in which the
 acid-producing cells in the lining of the stomach can't make acid. Acid production is
 controlled by gastrin, a hormone (chemical messenger) that's released into the bloodstream.
 If the stomach can't make acid, blood levels of gastrin rise. High blood levels of gastrin in
 patients with CAG can cause other cells (ECL cells) in the lining of the stomach to grow and,
 over the years, to give rise to gastric carcinoids. Gastric carcinoids are usually benign,
 but they can become malignant. Therefore, patients with CAG and gastric carcinoids have the
 inside of their stomach checked regularly, by gastroscopy, to see if the gastric carcinoids
 need removing surgically. A gastroscope is a thin (1 cm), flexible tube at end of which is a
 mini video camera, which enables the user to inspect the lining of the stomach and a 'snare'
 to take samples of tissue (biopsies). YF476 (netazepide) is a gastrin receptor antagonist
 (blocks the effects of gastrin), so it's a potential new medical treatment for gastric
 carcinoids in patients with CAG. Up to 10 of these patients will take YF476 daily for up to
 12 weeks. They'll make up to seven outpatient visits for tests, including checks on the
 safety of YF476 and up to four gastroscopies. At each gastroscopy, the gastric carcinoids
 will be measured and biopsies taken for laboratory tests. Patients will take up to 24 weeks
 to finish the study.
Inclusion Criteria:

 -  Patients known to have gastric carcinoids associated with chronic atrophic gastritis
 and hypergastrinaemia, and who attend the outpatient clinic of the investigator;

 -  Men, postmenopausal women, premenopausal women who have been sterilised by tubal
 ligation, hysterectomy or bilateral oophorectomy, or premenopausal women using
 reliable contraception: condom and spermicide or intrauterine device;

 -  Adults ≥ 18 years;

 -  Good general health; and

 -  Able to give fully-informed, written consent.

 Exclusion Criteria:

 -  Women who are pregnant, lactating or using a steroid contraceptive;

 -  History of gastric surgery, apart from surgery for gastric carcinoids;

 -  Evidence of Zollinger-Ellison syndrome;

 -  Prolonged QTc interval (>450 msec);

 -  Certain medicines and herbal remedies taken during the 7 days before visit 1;

 -  Previous treatment with somatostatin; or

 -  Participation in other clinical trials of unlicensed medicines within the previous 3
 months.