1. Signaling Pathways
  2. PI3K/Akt/mTOR
  3. mTOR

mTOR

Mammalian target of Rapamycin

mTOR (mammalian target of Rapamycin) is a protein that in humans is encoded by the mTOR gene. mTOR is a serine/threonine protein kinase that regulates cell growth, cell proliferation, cell motility, cell survival, protein synthesis, and transcription. mTOR belongs to the phosphatidylinositol 3-kinase-related kinase protein family. mTOR integrates the input from upstream pathways, including growth factors and amino acids. mTOR also senses cellular nutrient, oxygen, and energy levels. The mTOR pathway is dysregulated in human diseases, such as diabetes, obesity, depression, and certain cancers. Rapamycin inhibits mTOR by associating with its intracellular receptor FKBP12. The FKBP12-rapamycin complex binds directly to the FKBP12-Rapamycin Binding (FRB) domain of mTOR, inhibiting its activity.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-10219G
    Rapamycin (GMP)
    Inhibitor
    Rapamycin (Sirolimus) (GMP) is Rapamycin (HY-10219) produced by using GMP guidelines. GMP small molecules works appropriately as an auxiliary reagent for cell therapy manufacture. Rapamycin is a potent and specific mTOR inhibitor.
    Rapamycin (GMP)
  • HY-N4315
    Pomiferin
    Inhibitor 98.98%
    Pomiferin (NSC 5113) acts as an potential inhibitor of HDAC, with an IC50 of 1.05 μM, and also potently inhibits mTOR (IC50, 6.2 µM).
    Pomiferin
  • HY-N2590
    Lupenone
    99.74%
    Lupenone is an orally active lupine-type triterpenoid that can be isolated from Musa basjoo. Lupenone Lupenone plays a role through the PI3K/Akt/mTOR and NF-κB signaling pathways. Lupenone has anti-inflammatory, antiviral, antidiabetic and anticancer activities.
    Lupenone
  • HY-N0427
    Phellodendrine
    Agonist 99.60%
    Phellodendrine is an orally active plant alkaloid. Phellodendrine inhibits the proliferation of KRAS-mutated pancreatic cancer cells by suppressing macropinocytosis and glutamine metabolism, inducing ROS accumulation and mitochondrial apoptosis. Phellodendrine promotes autophagy by activating the AMPK/mTOR pathway, alleviating intestinal damage in ulcerative colitis. Phellodendrine can alleviate gouty arthritis by inhibiting the IL-6/STAT3 signaling pathway. Phellodendrine suppresses allergic reactions by altering the conformation of MRGPRB3/MRGPRX2 protein, thereby inhibiting the activation of PKC and subsequent downstream MAPK and NF-κB signaling. Phellodendrine inhibits the AKT/NF-κB pathway and down-regulates the expression of COX-2, thereby protecting zebrafish embryos from oxidative stress. Phellodendrine has an anti-major depressive disorder (MDD) effect by down-regulating CHRM1, HTR1A, and the PI3K/Akt signaling pathway.
    Phellodendrine
  • HY-141805
    MHY-1685
    Inhibitor 99.84%
    MHY-1685, a novel mammalian target of rapamycin (mTOR) inhibitor, provides opportunities to improve hCSC-based myocardial regeneration.
    MHY-1685
  • HY-113038
    D-α-Hydroxyglutaric acid
    Inhibitor ≥98.0%
    D-α-Hydroxyglutaric acid ((R)-2-Hydroxyglutarate) is the principal metabolite accumulating in neurometabolic disease D-2-hydroxyglutaric aciduria. D-α-Hydroxyglutaric acid is a weak competitive antagonist of α-ketoglutarate (α-KG) and inhibits multiple α-KG-dependent dioxygenases with a Ki of 10.87 mM. D-α-Hydroxyglutaric acid increases reactive oxygen species (ROS) production. D-α-Hydroxyglutaric acid binds and inhibits ATP synthase and inhibits mTOR signaling.
    D-α-Hydroxyglutaric acid
  • HY-155066
    FD274
    Inhibitor 99.45%
    FD274 is a highly potent PI3K/mTOR dual inhibitor with IC50s of 0.65 nM, 1.57 nM, 0.65 nM, 0.42 nM, and 2.03 nM against PI3Kα/β/γ/δ and mTOR, respectively. FD274 exhibits significant anti-proliferation of AML cell lines (HL-60 and MOLM-16). FD274 demonstrates dose-dependent inhibition of tumor growth in the HL-60 xenograft model. FD274 has the potential for acute myeloid leukemia research.
    FD274
  • HY-125927
    8-Aminoadenosine
    Inhibitor 99.94%
    8-Aminoadenosine (8-NH2-Ado), a RNA-directed nucleoside analogue, reduces cellular ATP levels and inhibits mRNA synthesis. 8-Aminoadenosine blocks Akt/mTOR signaling and induces autophagy and apoptosis in a p53-independent manner. 8-Aminoadenosine has antitumor activity.
    8-Aminoadenosine
  • HY-10218R
    Everolimus (Standard)
    Inhibitor
    Everolimus (Standard) is the analytical standard of Everolimus. This product is intended for research and analytical applications. Everolimus (RAD001) is a Rapamycin (HY-10219) derivative and a potent, selective and orally active mTOR1 inhibitor. Everolimus binds to FKBP-12 to generate an immunosuppressive complex. Everolimus inhibits tumor cells proliferation and induces cell apoptosis and autophagy. Everolimus has potent immunosuppressive and anticancer activities.
    Everolimus (Standard)
  • HY-10218S
    Everolimus-d4
    Inhibitor 98.74%
    Everolimus-d4 is the deuterium labeled Everolimus. Everolimus (RAD001) is a Rapamycin derivative and a potent, selective and orally active mTOR1 inhibitor. Everolimus binds to FKBP-12 to generate an immunosuppressive complex. Everolimus inhibits tumor cells proliferation and induces cell apoptosis and autophagy. Everolimus has potent immunosuppressive and anticancer activities.
    Everolimus-d<sub>4</sub>
  • HY-W142432
    Perfluoroundecanoic acid
    Activator 99.85%
    Perfluoroundecanoic acid is a perfluoroalkyl substance (PFAS). Perfluoroundecanoic acid is an orally active oxidative stress inducer. Perfluoroundecanoic acid promotes macrophage M2 polarization, activates Wnt/β-catenin signaling and enhances β-catenin nuclear accumulation. Perfluoroundecanoic acid -induced M2 phenotype macrophage accelerates tumor progression in vitro and in vivo. Perfluoroundecanoic acid induces DNA damage, reproductive and pathophysiological dysfunctions via oxidative stress in male Swiss mice. Perfluoroundecanoic acid inhibits Leydig cell development in pubertal male rats via inducing oxidative stress and autophagy. Perfluoroundecanoic acid accelerates insulitis development in a mouse model of type 1 diabetes. Perfluoroundecanoic acid can be used for the study of ovarian cancer, type 1 diabetes and inflammation.
    Perfluoroundecanoic acid
  • HY-122949
    Momordicine I
    Inhibitor
    Momordicine I is a cucurbitane-type triterpenoids. Momordicine I suppresses glioma growth by promoting apoptosis and impairing mitochondrial oxidative phosphorylation. Momordicine I inhibits glycolysis, lipid metabolism, induces autophagy in HNC cells to suppress head and neck cancer growth. Momordicine I alleviates isoproterenol-induced cardiomyocyte hypertrophy through suppression of PLA2G6 and DGK-ζ. Momordicine I exerts its cardiovascular benefits by upregulating nitric oxide, inhibiting the activity of angiotensin-converting enzyme (ACE), activating the PI3K/Akt pathway, reducing oxidative stress and inflammation. Momordicine I inhibits AKT1, IL-6, and SRC, suggesting its potential application in type 2 diabetes.
    Momordicine I
  • HY-W654330
    Pyraclostrobin-d6
    99.90%
    Pyraclostrobin-d6 is deuterium-labeled Pyraclostrobin (HY-N6626).
    Pyraclostrobin-d<sub>6</sub>
  • HY-169960
    2DII
    Inhibitor 98.92%
    2DII is a potent and selective mTORC2 inhibitor. 2DII selectively binds mSin1 PH domain and decreases the expression of AKT1 phosphorylation.
    2DII
  • HY-111065
    OXA-01
    Inhibitor
    OXA-01 is a potent mTORC1 and mTORC2 inhibitor, with IC50 values of 29 nM and 7 nM, respectively.
    OXA-01
  • HY-W130610R
    Stearamide (Standard)
    Activator
    Ginsenoside C-K (Standard) is the analytical standard of Ginsenoside C-K. This product is intended for research and analytical applications. Ginsenoside C-K, a bacterial metabolite of G-Rb1, exhibits anti-inflammatory effects by reducing iNOS and COX-2. Ginsenoside C-K exhibits an inhibition against the activity of CYP2C9 and CYP2A6 in human liver microsomes with IC50s of 32.0±3.6 μM and 63.6±4.2 μM, respectively.
    Stearamide (Standard)
  • HY-147284
    PI3K-IN-37
    Inhibitor ≥99.0%
    PI3K-IN-37 (Example 84.1) is a PI3K α/β/δ inhibitor with IC50s of 6, 8, 4 nM, respectively. PI3K-IN-37 can also inhibit mTOR (IC50=4 nM).
    PI3K-IN-37
  • HY-10620
    PI3K-IN-22
    Inhibitor 99.50%
    PI3K-IN-22 is a PI3Kα/mTOR dual kinase inhibitor. PI3K-IN-22 has IC50s of 0.9, 0.6 nM for PI3Kα and mTOR, respectively. PI3K-IN-22 can be used for the research of cancer.
    PI3K-IN-22
  • HY-123849
    SN32976
    Inhibitor 99.49%
    SN32976 is a potent and selective class I PI3K and mTOR inhibitor with IC50s of 15.1 nM, 461 nM, 110 nM, 134 nM and 194 nM for PI3Kα, PI3Kβ, PI3Kγ, PI3Kδ and mTOR, respectively. SN32976 shows high selectivity among other 442 kinases. SN32976 shows anticancer effects.
    SN32976
  • HY-137996
    Dehydrovomifoliol
    Inhibitor 98.88%
    Dehydrovomifoliol is a AKT/mTOR dual inhibitor. Dehydrovomifoliol reduces lipid accumulation and lipogenesis by inhibiting the AKT/mTOR signaling pathway. Dehydrovomifoliol is used in nonalcoholic fatty liver disease research (NAFLD) .
    Dehydrovomifoliol
Cat. No. Product Name / Synonyms Application Reactivity

The mammalian target of rapamycin (mTOR) signaling pathway integrates both intracellular and extracellular signals and serves as a central regulator of cell metabolism, growth, proliferation and survival[1]. mTOR is the catalytic subunit of two distinct complexes called mTORC1 and mTORC2. mTORC1 comprises DEPTOR, PRAS40, RAPTOR, mLST8, mTOR, whereas mTORC2 comprises DEPTOR, mLST8, PROTOR, RICTOR, mSIN1, mTOR[2]. Rapamycin binds to FKBP12 and inhibits mTORC1 by disrupting the interaction between mTOR and RAPTOR. mTORC1 negatively regulates autophagy through multiple inputs, including inhibitory phosphorylation of ULK1 and TFEB. mTORC1 promotes protein synthesis through activation of the translation initiation promoter S6K and through inhibition of the inhibitory mRNA cap binding 4E-BP1, and regulates glycolysis through HIF-1α. It promotes de novo lipid synthesis through the SREBP transcription factors. mTORC2 inhibits FOXO1,3 through SGK and Akt, which can lead to increased longevity. The complex also regulates actin cytoskeleton assembly through PKC and Rho kinase[3]

 

Growth factors: Growth factors can signal to mTORC1 through both PI3K-Akt and Ras-Raf-MEK-ERK axis. For example, ERK and RSK phosphorylate TSC2, and inhibit it.

 

Insulin Receptor: The activated insulin receptor recruits intracellular adaptor protein IRS1. Phosphorylation of these proteins on tyrosine residues by the insulin receptor initiates the recruitment and activation of PI3K. PIP3 acts as a second messenger which promotes the phosphorylation of Akt and triggers the Akt-dependent multisite phosphorylation of TSC2. TSC is a heterotrimeric complex comprised of TSC1, TSC2, and TBC1D7, and functions as a GTPase activating protein (GAP) for the small GTPase Rheb, which directly binds and activates mTORC1. mTORC2 primarily functions as an effector of insulin/PI3K signaling. 

 

Wnt: The Wnt pathway activates mTORC1. Glycogen synthase kinase 3β (GSK-3β) acts as a negative regulator of mTORC1 by phosphorylating TSC2. mTORC2 is activated by Wnt in a manner dependent on the small GTPase RAC1[4].

 

Amino acids: mTORC1 senses both lysosomal and cytosolic amino acids through distinct mechanisms. Amino acids induce the movement of mTORC1 to lysosomal membranes, where the Rag proteins reside. A complex named Ragulator, interact with the Rag GTPases, recruits them to lysosomes through a mechanism dependent on the lysosomal v-ATPase, and is essential for mTORC1 activation. In turn, lysosomal recruitment enables mTORC1 to interact with GTP-bound RHEB, the end point of growth factor. Cytosolic leucine and arginine signal to mTORC1 through a distinct pathway comprised of the GATOR1 and GATOR2 complexes.    

 

Stresses: mTORC1 responds to intracellular and environmental stresses that are incompatible with growth such as low ATP levels, hypoxia, or DNA damage. A reduction in cellular energy charge, for example during glucose deprivation, activates the stress responsive metabolic regulator AMPK, which inhibits mTORC1 both indirectly, through phosphorylation and activation of TSC2, as well as directly through the phosphorylation of RAPTOR. Sestrin1/2 are two transcriptional targets of p53 that are implicated in the DNA damage response, and they potently activate AMPK, thus mediating the p53-dependent suppression of mTOR activity upon DNA damage. During hypoxia, mitochondrial respiration is impaired, leading to low ATP levels and activation of AMPK. Hypoxia also affects mTORC1 in AMPK-independent ways by inducing the expression of REDD1, the protein products of which then suppress mTORC1 by promoting the assembly of TSC1-TSC2[2].

 

Reference:

[1]. Laplante M, et al.mTOR signaling at a glance.J Cell Sci. 2009 Oct 15;122(Pt 20):3589-94. 
[2]. Zoncu R, et al. mTOR: from growth signal integration to cancer, diabetes and ageing.Nat Rev Mol Cell Biol. 2011 Jan;12(1):21-35. 
[3]. Johnson SC, et al. mTOR is a key modulator of ageing and age-related disease.Nature. 2013 Jan 17;493(7432):338-45.
[4]. Shimobayashi M, et al. Making new contacts: the mTOR network in metabolism and signalling crosstalk.Nat Rev Mol Cell Biol. 2014 Mar;15(3):155-62.

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