Comparative effect of ozone exposure and 5-aminosalicylic acid in oxazolon-induced colitis upon the indices of innate immunity

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Abstract

Multiple effects of ozone are a prerequisite for its use in the complex therapy of inflammatory bowel diseases. Our aim was to analyze the effects of ozone and 5-aminosalicylic acid (5-ASA) in oxazolone-induced colitis (OIC) upon the innate immunity functions.

OIC was modeled in 72 male Wistar rats weighing 240±20 g by a two-stage application of oxazolone solution. Ozone at a dose of 0.05 mg/kg, as a part of ozone-oxygen mixture, was injected intraperitoneally every 24 hours. The laboratory indices were studied on the days 2, 4, 6. In blood samples, the number of leukocytes, differential leukocyte counts, absorptive capacity of blood neutrophils and their oxygen-dependent metabolism were studied. In homogenate of the colon mucosa, IL-17 concentration was measured.

In OIC, on days 2, 4, and 6, the number of blood leukocytes was increased, with a predominance of lymphocytes, monocytes, neutrophils and their absorption capacity; the concentration of IL-17 increased in the areas of colonic damage. On days 2 and 4, the activity and intensity of the spontaneous NBT test is increased like as activity and intensity of induced NBT-test on days 2 and 6. Administration of ozone reduced the content of blood leukocytes, lymphocytes, neutrophils on days 2 and 6, like as their absorption capacity on days 2 and 4, along with a decrease in NCT-reducing ability on days 6, and decreased IL-17 concentration in the area of colonic damage on days 4 and 6. The effects of ozone administration in OIC, if compared with 5-ASA, are less pronounced on days 2 and 4, with respect to decreased number of monocytes, neutrophils in blood and their absorption capacity on days 2, like as IL-17 concentration in the area of colonic damage on days 4 and 6.

About the authors

M. V. Osikov

South Ural State Medical University; Chelyabinsk Regional Clinical Hospital

Author for correspondence.
Email: prof.osikov@yandex.ru

PhD, MD (Medicine), Professor, Head, Department of Pathological Physiology; Head, Research Department

Russian Federation, Chelyabinsk; Chelyabinsk

N. V. Kaigorodtseva

South Ural State Medical University; Chelyabinsk Regional Clinical Hospital

Email: prof.osikov@yandex.ru

Assistant Professor, Department of Pathological Physiology; Anesthesiologist-Resuscitator, Resuscitation and Intensive Care Unit No. 3

Russian Federation, Chelyabinsk; Chelyabinsk

M. S. Boyko

South Ural State Medical University

Email: prof.osikov@yandex.ru

Assistant Professor, Department of Pathological Physiology

Russian Federation, Chelyabinsk

A. A. Fedosov

N. Pirogov Russian National Research Medical University; Peoples’ Friendship University of Russia

Email: prof.osikov@yandex.ru

PhD (Medicine), Associate Professor, Department of Anatomy, Faculty of Medicine; Associate Professor, Department of Histology, Cytology and Embryology

Russian Federation, Moscow; Moscow

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Copyright (c) 2022 Osikov M.V., Kaigorodtseva N.V., Boyko M.S., Fedosov A.A.

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