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Psychosomatic Medicine, Vol 60, Issue 3 331-337, Copyright © 1998 by American Psychosomatic Society

ORIGINAL ARTICLES

Gastrin, cholecystokinin, and somatostatin in a laboratory experiment of patients with functional dyspepsia

BH Jonsson, K Uvnas-Moberg, T Theorell and R Gotthard
Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden.

OBJECTIVE: To explore the pattern of gastrointestinal hormonal variations in plasma and to relate this to possible pathophysiological mechanisms in functional dyspepsia. METHOD: There were 25 patients, 12 men and 13 women, aged 24 to 50 years, with recurrent functional dyspepsia, compared with community control subjects pair-wise, matched for age and sex. The subjects participated in a laboratory stress experiment with timed provocations. At fixed intervals, 22 samples of blood were drawn from each subject and frozen for later peptide analyses. Levels of gastrin, cholecystokinin (CCK), and somatostatin were measured by radioimmunoassay. Peptide levels were studied during a friendly greeting, a stress interview, and a food stimulation. RESULTS: Mean hormone values did not differ between the groups. Smokers had lower mean CCK than nonsmokers. Patients with a high degree of dyspeptic symptoms during the week preceding the experiment had a higher mean somatostatin level than patients with a low degree of dyspeptic symptoms. Heartburn correlated positively with the mean somatostatin level. Mean gastrin correlated with body mass index. During the 15-minute stress interview, significant changes in peptide variations were noted: Gastrin increased in both patient and control group subjects. CCK levels increased in patients from 7.2 pmol/l (6.0-8.5) to 9.8 pmol/l (8.2-11.4), but not in control subjects (p < 0.04, two-way interaction). Somatostatin increased significantly earlier in patients than in the control subjects during the stress interview. CONCLUSIONS: A positive relationship was found between the mean level of somatostatin and the degree of dyspeptic symptoms. Gastrin, CCK, and somatostatin were all sensitive to an anxiety-provoking interview. CCK and somatostatin may possibly link psychological reactions to the pathophysiology of functional dyspepsia.


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Copyright © 1998 by the American Psychosomatic Society