Expression of melatonin synthesizing enzymes in Helicobacter pylori infected gastric mucosa

Cezary Chojnacki, Tomasz Popławski, Janusz Blasiak, Jan Chojnacki, Russel J. Reiter, Grazyna Klupinska

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Helicobacter pylori colonization of gastric mucosa causes pain of unknown etiology in about 15-20% of infected subjects. The aim of the present work was to determine the level of expression of enzymes involved in the synthesis of melatonin in gastric mucosa of asymptomatic and symptomatic H. pylori infected patients. To diagnose H. pylori infection, histological analysis and the urea breath test (UBT C13) were performed. The levels of mRNA expression of arylalkylamine-N-acetyltransferase (AA-NAT) and acetylserotonin methyltransferase (ASMT) were estimated in gastric mucosa with RT-PCR. The level of AA-NAT expression and AMST was decreased in H. pylori infected patients and was increased after H. pylori eradication. We conclude that decreased expression of melatonin synthesizing enzymes, AA-NAT and ASMT, in patients with symptomatic H. pylori infection returns to normal level after H. pylori eradication.

Original languageEnglish (US)
Article number845032
JournalBioMed Research International
StatePublished - 2013

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology
  • General Immunology and Microbiology


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