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2015 | 28 | 1 | 37-41
Article title

Changes of nitric oxide system and lipid peroxidation parameters in the digestive system of rats under conditions of acute stress, and use of nonsteroidal anti-inflammatory drugs

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EN
Abstracts
EN
The use of nonsteroidal anti-inflammatory drugs (NSAIDs) in combination with being physiologically stressed often occurs in in the course of different pathologies. This situation may result in the alteration of digestive system functioning. The effect of stress brings about changes in the activity of nitric oxide synthase (NOS), arginase, cyclooxygenase (COX) and lipid peroxidation, whereas the use of NSAIDs interrupts the multiple functions of the cell via the inhibition of prostaglandins (PGs) synthesis. Taking into account that NOS and COX-systems are connected in their regulation, the aim of the study was to determine the role played by NOS and lipid peroxidation under conditions of the combined action of NSAIDs and stress. In our study, male rats were used. The NSAIDs (naproxen - a non-selective COX inhibitor, celecoxib - a selective COX-2 blocker, and the compound 2A5DHT (which is the active substance of dual COX, and the lipoxygenase (LOX) inhibitor, darbufelone) were all administered at a dose 10 mg/kg, prior to water restraint stress (WRS). WRS brought about an increase of inducible NOS (iNOS) activity in the intestinal mucosal and muscular membranes, as well as in the pancreas. Because of this, constitutive NOS izoform (cNOS) and arginase activities decreased. Moreover, the MDA concentration increased, indicating the development of oxidative stress. In our work, pretreatment with naproxen, as in the WRS model, engendered a decrease in iNOS activity. What is more, administration of Celecoxib did not change iNOS activity, as compared to WRS alone, and it showed a tendency to reduce lipid peroxidation. In addition, 2A5DHT prior WRS brought about a decrease of iNOS activity, with the subsequent rise of cNOS activity. Of note, MDA concentration decreased in all studied organs, indicating the reduction of lipid peroxidation under the action of the darbufelone active substance.
Publisher

Year
Volume
28
Issue
1
Pages
37-41
Physical description
Dates
published
1 - 3 - 2015
accepted
12 - 12 - 2014
received
7 - 11 - 2014
online
9 - 5 - 2015
Contributors
author
  • Department of Biochemistry of Danylo Halytsky Lviv National Medical University, 69 Pekarska Street, 79000 Lviv, Ukrain, biochemistry@meta.ua
  • Department of Biochemistry of Danylo Halytsky Lviv National Medical University, 69 Pekarska Street, 79000 Lviv, Ukrain, biochemistry@meta.ua
  • Department of Biochemistry of Danylo Halytsky Lviv National Medical University, 69 Pekarska Street, 79000 Lviv, Ukrain, biochemistry@meta.ua
  • Department of Biochemistry of Danylo Halytsky Lviv National Medical University, 69 Pekarska Street, 79000 Lviv, Ukrain, biochemistry@meta.ua
  • Department of Biochemistry of Danylo Halytsky Lviv National Medical University, 69 Pekarska Street, 79000 Lviv, Ukrain, biochemistry@meta.ua
author
  • Department of Biochemistry of Danylo Halytsky Lviv National Medical University, 69 Pekarska Street, 79000 Lviv, Ukrain, biochemistry@meta.ua
author
  • Department of Biochemistry of Danylo Halytsky Lviv National Medical University, 69 Pekarska Street, 79000 Lviv, Ukrain, biochemistry@meta.ua
  • Department of Biochemistry of Danylo Halytsky Lviv National Medical University, 69 Pekarska Street, 79000 Lviv, Ukrain, biochemistry@meta.ua
References
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  • 3. Fomenko I.S. et al.: Parameters of NO synthase system of gastric mucosa in rats under stress conditions and inhibition of cyclooxygenase. Fiziol Zh., 60, 2, 2014.
  • 4. Fomenko I. et al.: Effects of conventional and hydrogen sulfidereleasing non-steroidal anti-inflammatory drugs in rats with stressinduced and epinephrine-induced gastric damage. Stress, 17(6), 528, 2014.[Crossref]
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_1515_cipms-2015-0040
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