PGC-1α alternative promoter (Exon 1b) controls augmentation of total PGC-1α gene expression in response to cold water immersion and low glycogen availability

被引:5
|
作者
Allan, R. [1 ,2 ]
Morton, J. P. [1 ]
Close, G. L. [1 ]
Drust, B. [1 ]
Gregson, W. [1 ]
Sharples, A. P. [1 ,3 ]
机构
[1] Liverpool John Moores Univ, Res Inst Sport & Exercise Sci, Liverpool, Merseyside, England
[2] Univ Cent Lancashire, Div Sport Exercise & Nutr Sci, Preston, Lancs, England
[3] Norwegian Sch Sport Sci, Inst Phys Performance, Oslo, Norway
关键词
CWI; PGC-1; alpha; Exon; MESSENGER-RNA; EXERCISE;
D O I
10.1007/s00421-020-04467-6
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
This investigation sought to determine whether post-exercise cold water immersion and low glycogen availability, separately and in combination, would preferentially activate either the Exon 1a or Exon 1b Peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1 alpha) promoter. Through a reanalysis of sample design, we identified that the systemic cold-induced augmentation of total PGC-1 alpha gene expression observed previously (Allan et al. in J Appl Physiol 123(2):451-459, 2017) was largely a result of increased expression from the alternative promoter (Exon 1b), rather than canonical promoter (Exon 1a). Low glycogen availability in combination with local cooling of the muscle (Allan et al. in Physiol Rep 7(11):e14082, 2019) demonstrated that PGC-1 alpha alternative promoter (Exon 1b) expression continued to rise at 3 h post-exercise in all conditions; whilst, expression from the canonical promoter (Exon 1a) decreased between the same time points (post-exercise-3 h post-exercise). Importantly, this increase in PGC-1 alpha Exon 1b expression was reduced compared to the response of low glycogen or cold water immersion alone, suggesting that the combination of prior low glycogen and CWI post-exercise impaired the response in gene expression versus these conditions individually. Data herein emphasise the influence of post-exercise cooling and low glycogen availability on Exon-specific control of total PGC-1 alpha gene expression and highlight the need for future research to assess Exon-specific regulation of PGC-1 alpha.
引用
收藏
页码:2487 / 2493
页数:7
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