SUMMARY
Background. This study aimed investigating the effects of whole-body vibration (WBV) on morphological parameters and the antioxidant system of the diaphragm muscle of Wistar rats with monosodium glutamate (MSG) obesity induction.
Methods. 28 animals were separated into two groups: obesity (administration of MSG) and control group. At 80 days of age, the groups were subdivided and training with WBV was started for eight weeks, constituting the control (GC), WBV control (GCP), obese (GO) and obese WBV (GOP) groups. At the end of the experimental period, when the animals were 136 days old, euthanasia and removal of the diaphragm muscle occurred. The right muscle anthem was prepared for histological analysis, quantification of total proteins and oxidative stress.
Results. Obese animals exhibited a reduction in the cross-section area of fiber types IIA, IIB, and total proteins; as for the enzymes of oxidative stress, there was a reduction in catalase activity and an increase in glutathione S-transferase. On the other hand, in the animals trained, there was a reduction in the amount of fiber type IIB, inferring possible deleterious effects on the contractile capacity of strength and an increase in the activity of the glutathione S-transferase enzyme, which was also verified in the group of association of obesity and training, besides a reduction in the activity of glutathione reductase.
Conclusions. Obesity caused a reduction in the total proteins of the diaphragm muscle, as well as a decrease in the area of type IIA and IIB fibers and enzymes in the ant oxidant defense system. The WBV has not been able to reverse the effects caused by obesity.
Whole-Body Vibration, Morphological and Antioxidant Effects on the Diaphragm Muscle of Obese Rats
M. de Campos Oliveira, M. Laís Boaretto, A. Barbosa, A. T. Bittencourt Guimarães, G. R. Flor Bertolini, M. M. Torrejais, R. M. Costa
Original Article, 648-656
Keywords: diaphragm, exercise., hypothalamic obesity, muscle tissue, Oxidative stress,
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