期刊
CELL CYCLE
卷 5, 期 13, 页码 1391-1396出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/cc.5.13.2921
关键词
amino acids; exercise; growth; hypertrophy; mechanotransduction; stretch; phosphatidic acid; phospholipase D; phosphotidylinositol-3-kinase (PI3K); rapamycin
类别
资金
- NHLBI NIH HHS [R01HL80518, R01HL64382] Funding Source: Medline
- NIAMS NIH HHS [F32AR052240] Funding Source: Medline
- NICHD NIH HHS [HD050837] Funding Source: Medline
Mechanical stimuli play a major role in the regulation of skeletal muscle mass, and the maintenance of muscle mass contributes significantly to disease prevention and the quality of life. Although a link between mechanical stimuli and the regulation of muscle mass has been recognized for decades, the mechanisms involved in converting mechanical information into the molecular events that control this process have not been defined. Nevertheless, significant advancements are being made in this field, and it has recently been established that signaling through a rapamycin-sensitive pathway is necessary for mechanically induced growth of skeletal muscle. Since rapamycin is a highly specific inhibitor of a protein kinase called the mammalian target of rapamycin ( mTOR), many investigators have concluded that mTOR signaling is necessary for the mechanically induced growth of skeletal muscle. In this review, we have summarized the current knowledge regarding how mechanical stimuli activate mTOR signaling, discussed the newly discovered role of phospholipase D (PLD) and phosphatidic acid (PA) in this pathway, and considered the potential roles of PLD and PA in the mechanical regulation of skeletal muscle mass.
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