Crosstalk between glucocorticoid receptor and nutritional sensor mTOR in skeletal muscle

Noriaki Shimizu, Noritada Yoshikawa, Naoki Ito, Takako Maruyama, Yuko Suzuki, Sin Ichi Takeda, Jun Nakae, Yusuke Tagata, Shinobu Nishitani, Kenji Takehana, Motoaki Sano, Keiichi Fukuda, Makoto Suematsu, Chikao Morimoto, Hirotoshi Tanaka

Research output: Contribution to journalArticle

210 Citations (Scopus)

Abstract

Maintenance of skeletal muscle mass relies on the dynamic balance between anabolic and catabolic processes and is important for motility, systemic energy homeostasis, and viability. We identified direct target genes of the glucocorticoid receptor (GR) in skeletal muscle, i.e., REDD1 and KLF15. As well as REDD1, KLF15 inhibits mTOR activity, but via a distinct mechanism involving BCAT2 gene activation. Moreover, KLF15 upregulates the expression of the E3 ubiquitin ligases atrogin-1 and MuRF1 genes and negatively modulates myofiber size. Thus, GR is a liaison involving a variety of downstream molecular cascades toward muscle atrophy. Notably, mTOR activation inhibits GR transcription function and efficiently counteracts the catabolic processes provoked by glucocorticoids. This mutually exclusive crosstalk between GR and mTOR, a highly coordinated interaction between the catabolic hormone signal and the anabolic machinery, may be a rational mechanism for fine-tuning of muscle volume and a potential therapeutic target for muscle wasting.

Original languageEnglish
Pages (from-to)170-182
Number of pages13
JournalCell Metabolism
Volume13
Issue number2
DOIs
Publication statusPublished - 2011 Feb 2

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Glucocorticoid Receptors
Skeletal Muscle
Muscles
Ubiquitin-Protein Ligases
Muscular Atrophy
Transcriptional Activation
Glucocorticoids
Genes
Homeostasis
Up-Regulation
Maintenance
Hormones
Therapeutics

ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology
  • Physiology

Cite this

Shimizu, N., Yoshikawa, N., Ito, N., Maruyama, T., Suzuki, Y., Takeda, S. I., ... Tanaka, H. (2011). Crosstalk between glucocorticoid receptor and nutritional sensor mTOR in skeletal muscle. Cell Metabolism, 13(2), 170-182. https://doi.org/10.1016/j.cmet.2011.01.001

Crosstalk between glucocorticoid receptor and nutritional sensor mTOR in skeletal muscle. / Shimizu, Noriaki; Yoshikawa, Noritada; Ito, Naoki; Maruyama, Takako; Suzuki, Yuko; Takeda, Sin Ichi; Nakae, Jun; Tagata, Yusuke; Nishitani, Shinobu; Takehana, Kenji; Sano, Motoaki; Fukuda, Keiichi; Suematsu, Makoto; Morimoto, Chikao; Tanaka, Hirotoshi.

In: Cell Metabolism, Vol. 13, No. 2, 02.02.2011, p. 170-182.

Research output: Contribution to journalArticle

Shimizu, N, Yoshikawa, N, Ito, N, Maruyama, T, Suzuki, Y, Takeda, SI, Nakae, J, Tagata, Y, Nishitani, S, Takehana, K, Sano, M, Fukuda, K, Suematsu, M, Morimoto, C & Tanaka, H 2011, 'Crosstalk between glucocorticoid receptor and nutritional sensor mTOR in skeletal muscle', Cell Metabolism, vol. 13, no. 2, pp. 170-182. https://doi.org/10.1016/j.cmet.2011.01.001
Shimizu N, Yoshikawa N, Ito N, Maruyama T, Suzuki Y, Takeda SI et al. Crosstalk between glucocorticoid receptor and nutritional sensor mTOR in skeletal muscle. Cell Metabolism. 2011 Feb 2;13(2):170-182. https://doi.org/10.1016/j.cmet.2011.01.001
Shimizu, Noriaki ; Yoshikawa, Noritada ; Ito, Naoki ; Maruyama, Takako ; Suzuki, Yuko ; Takeda, Sin Ichi ; Nakae, Jun ; Tagata, Yusuke ; Nishitani, Shinobu ; Takehana, Kenji ; Sano, Motoaki ; Fukuda, Keiichi ; Suematsu, Makoto ; Morimoto, Chikao ; Tanaka, Hirotoshi. / Crosstalk between glucocorticoid receptor and nutritional sensor mTOR in skeletal muscle. In: Cell Metabolism. 2011 ; Vol. 13, No. 2. pp. 170-182.
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