Time-course Of Transcriptomic Responses In Skeletal Muscle During Recovery From Endurance Exercise Indicates Prolonged Muscular Inflammation

Authors

Oliver Neubauer, University of Vienna, Austria; Griffith University, AustraliaFollow
Surendran Sabapathy, Griffith University, Australia
Jonathan M. Peake, Queensland University of Technology, Australia
Kevin J. Ashton, Bond University, Australia
Barbara Wessner, University of Vienna, Austria
Ben Desbrow, Griffith University, Australia
Ross Lazarus, Baker IDI Heart and Diabetes Institute, Australia; Harvard Medical School, USA
David Cameron-Smith, University of Auckland, New Zealand
Karl-Heinz Wagner, University of Vienna, Austria; Griffith University, Australia
Luke J. Haseler, Griffith University, Australia
Andrew C. Bulmer, Griffith University, Australia

Abstract

Introduction

Re-programming of gene expression is fundamental for skeletal muscle adaptations in response to endurance exercise. Although inflammatory responses in muscle following muscle-damaging exercise can persist for days, there is a paucity of global gene expression data beyond 48 hours following exercise. This study aimed to investigate the changes in the transcriptome of skeletal muscle until 96 hours after an endurance exercise trial (EXTRI; one hour of cycling followed by one hour of running). Data on the transcriptome of circulating neutrophils from participants in the current study indicated that the neutrophil transcriptional activity was related to the muscle-damaging component of the EXTRI (Neubauer et al. 2013, J Appl Physiol.). We hypothesised that the muscular transcriptome would particularly reflect interactions between muscle and infiltrating leukocytes.

Methods

Eight healthy, endurance-trained, male individuals participated. Skeletal muscle samples were taken one week before the EXTRI, 3, 48, and 96 hours post-EXTRI. RNA was extracted from muscle tissue. Differential gene expression was evaluated using Illumina microarrays, and validated with q-PCR. Gene set enrichment analysis identified functionally related gene sets chosen from the Molecular Signatures Database.

Results

Significantly (FWER p-value

Conclusions

The current data indicate that many of the coordinated gene expression responses in skeletal muscle, particularly at 96 hours post-EXTRI, were related with exercise-induced muscle damage, and the subsequent accumulation of muscle leukocytes. The substantial transcriptional activity 96 h post-EXTRI was strongly associated with inflammatory and immune responses, and suggests that muscular recovery, from a transcriptional perspective, is incomplete 96 hours after exercise.

Recommended Citation

Neubauer, Oliver; Sabapathy, Surendran; Peake, Jonathan M.; Ashton, Kevin J.; Wessner, Barbara; Desbrow, Ben; Lazarus, Ross; Cameron-Smith, David; Wagner, Karl-Heinz; Haseler, Luke J.; and Bulmer, Andrew C. (2013) "Time-course Of Transcriptomic Responses In Skeletal Muscle During Recovery From Endurance Exercise Indicates Prolonged Muscular Inflammation," International Journal of Exercise Science: Conference Proceedings: Vol. 10: Iss. 1, Article 22.
Available at: https://digitalcommons.wku.edu/ijesab/vol10/iss1/22