| Autor: |
Shute RJ; Department of Health and Kinesiology, University of Nebraska at Omaha , Omaha, Nebraska., Heesch MW; Department of Health and Kinesiology, University of Nebraska at Omaha , Omaha, Nebraska., Zak RB; Department of Health and Kinesiology, University of Nebraska at Omaha , Omaha, Nebraska., Kreiling JL; Department of Chemistry, University of Nebraska at Omaha , Omaha, Nebraska., Slivka DR; Department of Health and Kinesiology, University of Nebraska at Omaha , Omaha, Nebraska. |
| Jazyk: |
angličtina |
| Zdroj: |
American journal of physiology. Regulatory, integrative and comparative physiology [Am J Physiol Regul Integr Comp Physiol] 2018 Jun 01; Vol. 314 (6), pp. R850-R857. Date of Electronic Publication: 2018 Mar 14. |
| DOI: |
10.1152/ajpregu.00425.2017 |
| Abstrakt: |
Peroxisome proliferator-activated receptor-α coactivator-1α (PGC-1α) mRNA is increased with both exercise and exposure to cold temperature. However, transcriptional control has yet to be examined during exercise in the cold. Additionally, the need for environmental cold exposure after exercise may not be a practical recovery modality. The purpose of this study was to determine mitochondrial-related gene expression and transcriptional control of PGC-1α following exercise in a cold compared with room temperature environment. Eleven recreationally trained males completed two 1-h cycling bouts in a cold (7°C) or room temperature (20°C) environment, followed by 3 h of supine recovery in standard room conditions. Muscle biopsies were taken from the vastus lateralis preexercise, postexercise, and after a 3-h recovery. Gene expression and transcription factor binding to the PGC-1α promoter were analyzed. PGC-1α mRNA increased from preexercise to 3 h of recovery, but there was no difference between trials. Estrogen-related receptor-α (ERRα), myocyte enhancer factor-2 (MEF2A), and nuclear respiratory factor-1 (NRF-1) mRNA were lower in cold than at room temperature. Forkhead box class-O (FOXO1) and cAMP response element-binding protein (CREB) binding to the PGC-1α promoter were increased postexercise and at 3 h of recovery. MEF2A binding increased postexercise, and activating transcription factor 2 (ATF2) binding increased at 3 h of recovery. These data indicate no difference in PGC-1α mRNA or transcriptional control after exercise in cold versus room temperature and 3 h of recovery. However, the observed reductions in the mRNA of select transcription factors downstream of PGC-1α indicate a potential influence of exercise in the cold on the transcriptional response related to mitochondrial biogenesis. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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