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Oxidative Medicine and Cellular Longevity
Volume 2015, Article ID 190640, 11 pages
http://dx.doi.org/10.1155/2015/190640
Research Article

Daily Oxygen/O3 Treatment Reduces Muscular Fatigue and Improves Cardiac Performance in Rats Subjected to Prolonged High Intensity Physical Exercise

1Department of Experimental Medicine, Section of Pharmacology “L. Donatelli”, Second University of Naples, 80138 Naples, Italy
2Department of Anaesthetic, Surgical and Emergency Sciences, Second University of Naples, 80138 Naples, Italy
3Department of Physical and Mental Health and Preventive Medicine, Second University of Naples, 80138 Naples, Italy
4Department Magrassi-Lanzara, Second University of Naples, 80138 Naples, Italy

Received 26 May 2015; Accepted 28 June 2015

Academic Editor: Steven McAnulty

Copyright © 2015 C. Di Filippo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Rats receiving daily intraperitoneal administration of O2 and running on a treadmill covered an average distance of 482.8 ± 21.8 m/week as calculated during 5-week observation. This distance was increased in rats receiving daily intraperitoneal administration of an oxygen/O3 mixture at a dose of 100; 150; and 300 μg/kg with the maximum increase being +34.5% at 300 μg/kg and still present after stopping the administration of oxygen/O3. Oxygen/O3 decreased the mean arterial blood pressure (−13%), the heart rate (−6%), the gastrocnemius and cardiac hypertrophy, and fibrosis and reduced by 49% the left ventricular mass and relative wall thickness measurements. Systolic and diastolic functions were improved in exercised oxygen/O3 rats compared to O2 rats. Oxygen/O3 treatment led to higher MPI index starting from the dose of 150 μg/kg () and more effective (+14%) at a dose of 300 μg/kg oxygen/O3. Oxygen/O3 dose-dependently increased the expression of the antioxidant enzymes Mn-SOD and GPx1 and of eNOS compared to the exercised O2 rats. The same doses resulted in decrease of LDH levels, CPK, TnI, and nitrotyrosine concentration in the heart and gastrocnemius tissues, arguing a beneficial effect of the ozone molecule against the fatigue induced by a prolonged high intensity exercise.