Circadian marker in duodenal ulcer

Abstract

The purpose. To study the content of melatonin in venous blood, to assess the seasonal variability of the hormone in patients with duodenal ulcer (DU) and to establish a possible relationship between the studied parameters.Material and methods. 45 patients with varying clinical activity of DU during exacerbation and during treatment were examined. Determination of melatonin in venous blood was carried out using high-performance liquid chromatography with tandem mass spectrometry. To assess the condition of the duodenum, fibrogastroduodenoscopy of the gastroduodenal zone we used Exera (cIF160) and Olympus endoscopes.Results. It has been established that in the active stage of DU the levels of the hormone melatonin are reduced. In order to study the possible effect of light illumination on melatonin content, we studied the production of this indole in groups of patients with DU at different times of the year. It turned out that the melatonin content was significantly lower in the group of patients with peptic ulcer disease in winter and spring.Conclusion. The regression and correlation analysis carried out revealed a positive moderate dependence of the melatonin indicator on the duration of daylight hours in the venous blood. Clinical remission of DU after 2 months was accompanied by an increase in melatonin production.