Where does mTOR phosphorylate p70S6K?
gallbladder cancer tissue
AKT/mTOR substrate P70S6K is frequently phosphorylated in gallbladder cancer tissue and cell lines – PMC.
What is p70S6K function?
The 70-kDa ribosomal protein S6 kinase (p70S6K) is known to regulate cell growth by inducing protein synthesis components. We purified membrane-based p70S6K as a kinase responsible for site-specific phosphorylation of BAD, which inactivates this proapoptotic molecule.
Is mTOR phosphorylated?
Serine 1261 was identified as an unambiguous site of mTOR phosphorylation in cells growing in serum-containing medium as well as in factor-deprived cells that were stimulated with both insulin and amino acids (Fig. 1B).
What is mTOR used for?
Mammalian target of rapamycin (mTOR) inhibitors are used in treatment of renal cancer and is being studied for use in other types of cancers. More benefits are being seen when MTOR inhibitors are combined with other chemotherapy agents.
Does rapamycin reduce inflammation?
Rapamycin inhibits the formation and development of atherosclerosis (AS) by promoting vasorelaxation, inhibiting monocyte recruitment, inhibiting VSMCs de-differentiation, reducing inflammatory immune response, decreasing foam cell formation, inhibiting platelet activation, enhancing autophagy, and inhibiting …
What are the effects of mTOR?
Importantly, the introduction of mTOR inhibitors as a therapeutic regimen generated a new spectrum of side effects that resulted in 20-40% dropout rates in phase III clinical trials [61]. The most common side effects are immunosuppression, hyperglycemia, and dyslipidemia as well as interstitial pneumonitis [59].
What is mTOR in the body?
A protein that helps control several cell functions, including cell division and survival, and binds to rapamycin and other drugs. mTOR may be more active in some types of cancer cells than it is in normal cells. Blocking mTOR may cause the cancer cells to die. It is a type of serine/threonine protein kinase.
What is mTOR responsible for?
The mTOR pathway is a central regulator of mammalian metabolism and physiology, with important roles in the function of tissues including liver, muscle, white and brown adipose tissue, and the brain, and is dysregulated in human diseases, such as diabetes, obesity, depression, and certain cancers.
What happens when mTOR is inhibited?
The inhibition of mTOR blocks the binding of the accessory protein raptor (regulatory-associated protein of mTOR) to mTOR, but that is necessary for downstream phosphorylation of S6K1 and 4EBP1. As a consequence, S6K1 dephosphorylates, which reduces protein synthesis and decreases cell mortality and size.
What is the purpose of mTOR?
mTOR, as the catalytic subunit of two distinct protein complexes, mTORC1 and mTORC2, is the major regulator of growth in animals and controls most anabolic and catabolic processes in response to nutrients and nutrient-induced signals, like insulin (Fig. 1).