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ISSN 2522-9028 (Print)
ISSN 2522-9036 (Online)
DOI: https://doi.org/10.15407/fz

Fiziologichnyi Zhurnal

is a scientific journal issued by the

Bogomoletz Institute of Physiology
National Academy of Sciences of Ukraine

Editor-in-chief: V.F. Sagach

The journal was founded in 1955 as
1955 – 1977 "Fiziolohichnyi zhurnal" (ISSN 0015 – 3311)
1978 – 1993 "Fiziologicheskii zhurnal" (ISSN 0201 – 8489)
1994 – 2016 "Fiziolohichnyi zhurnal" (ISSN 0201 – 8489)
2017 – "Fiziolohichnyi zhurnal" (ISSN 2522-9028)

Fiziol. Zh. 2015; 61(1): 42-49


ROLE OF CYCLOOXYGENASE IN MODIFICATION OF INTESTINAL MICROFLORA UNDER STRESS CONDITION

I.S. Fomenko, O.P. Korniychuk, A.R. Hural’, R.G. Shykula, I.I. Ilkiv, A.Ya. Sklyarov

    D. Halytskyi National Medical University, Lviv, Ukraine
DOI: https://doi.org/10.15407/fz61.01.042

Abstract

Stress and nonsteroidal anti-inflammatory drugs, which act as nonselective inhibitors of cyclooxygenase, are the main factors of ulcerogenesis in digestive system. However, the peculiarities of their combined action upon the status of intestinal microflora and the parameters of NO-synthase system are still poorly understood. In experiments with rats we show that water-restrained stress was accompanied by a considerable increase of iNOS activity and intensity of lipoperoxidation processes. The increase of Escherichia coli content and the decrease in Enterococcus spp. concentration in the small intestine with their simultaneous rise in the large intestine were noticed under these conditions. Cyclooxygenese blockage with naproxen prior to induction of water-restrained stress was accompanied by the decease of iNOS in small and large intestines, with the synchronous rise of cNOS activity in the large intestine as compared with indexes in stress. The moderate increase in Enterococcus spp. content in duodenum with the rise of Escherichia coli concentration in the ileum was shown. The Escherichia coli content decreased in the proximal part of the large intestine and decreased in its distal part. Disbiosis, intensification of lipoperoxidation processes and changes in NO-synthase system parameters under condition of simultaneous action of stress and cyclooxygenase blockage can create preconditions for the development of destructive changes and enteropathias.

Keywords: stress; NSAIDs; nitric oxide; microflora; small intestine; large intestine.

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