Increased xanthine oxidase-related ROS production and TRPV1 synthesis preceding DOMS post-eccentric exercise in rats

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• 作者：Leandro T. Retamoso^a ; ^b ; ¹ ; Mauro E.P. Silveira Junior^a ; ^c ; ¹ ; Frederico D. Lima^a ; Guilherme L. Busanello^a ; ^b ; Guilherme Bresciani^d ; Leandro R. Ribeiro^a ; ^e ; Pietro M. Chagas^c ; Cristina W. Nogueira^c ; Ana Claudia M. Braga^f ; Ana Flá ; via Furian^f ; Mauro S. Oliveira^f ; Michele R. Fighera^g ; Luiz Fernando F. Royes^a ; ^c ; ^{nandoroyes@yahoo.com.br" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Eccentric exercise ; Xanthine oxidase ; Oxidative stress ; TRPV1 ; DOMS
• 刊名：Life Sciences
• 出版年：2016
• 出版时间：1 May 2016
• 年：2016
• 卷：152
• 期：Complete
• 页码：52-59
• 全文大小：668 K

文摘

It is well-known that unaccustomed exercise, especially eccentric exercise, is associated to delayed onset muscle soreness (DOMS). Whether DOMS is associated with reactive oxygen species (ROS) and the transient receptor potential vanilloid 1 (TRPV1) is still an open question. Thus, the aim of this study was to investigate the association between TRPV1 and xanthine oxidase-related ROS production in muscle and DOMS after a bout of eccentric exercise.

Main methods

Male Wistar rats performed a downhill running exercise on a treadmill at a − 16° tilt and a constant speed for 90 min (5 min/bout separated by 2 min of rest). Mechanical allodynia and grip force tests were performed before and 1, 3, 6, 9, 12, 24, 48 and 72 h after the downhill running. Biochemical assays probing oxidative stress, purine degradation, xanthine oxidase activity, Ca^2 + ATPase activity and TRPV1 protein content were performed in gastrocnemius muscle at 12, 24, and 48 h after the downhill running.

Key findings

Our statistical analysis showed an increase in mechanical allodynia and a loss of strength after the downhill running. Similarly, an increase in carbonyl, xanthine oxidase activity, uric acid levels and TRPV1 immunoreactivity were found 12 h post-exercise. On the other hand, Ca^2 + ATPase activity decreased in all analyzed times.

Significance

Our results suggest that a possible relationship between xanthine oxidase-related ROS and TRPV1 may exist during the events preceding eccentric exercise-related DOMS.