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

mTOR

Mammalian target of Rapamycin

mTOR

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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.

mTOR Isoform Specific Products:

mTOR Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • 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
  • HY-N0143A
    Phlorizin dihydrate
    		Inhibitor 99.51%
    Phlorizin (Floridzin) dihydrate is an orally active non-selective sodium-glucose cotransporter (SGLT) inhibitor, with an IC50 of 0.04 μM and a Ki of 39 nM against hSGLT2, and an IC50 of 0.17 μM and a Ki of 0.31 μM against hSGLT1. Phlorizin dihydrate promotes GLUT4 translocation, inhibits gluconeogenesis and promotes glycogen synthesis by activating the PI3K/Akt/mTOR pathway. Phlorizin dihydrate reduces DNA damage and apoptosis (apoptosis) by inhibiting the NF-κB inflammatory pathway. Phlorizin dihydrate induces apoptosis via activating the Caspase pathway by antagonizing the JAK/STAT3 and PCK pathways. Phlorizin dihydrate also exhibits antibacterial, anti-inflammatory and neuroprotective activities.
    Phlorizin dihydrate
  • HY-N6932
    Voacamine
    		99.64%
    Voacamine is an indole alkaloid with cannabinoid 1 (CB1) antagonistic activity. Voacamine can inhibit nuclear translocation. Voacamine is effective in enhancing the effect of Doxorubicin (HY-15142A) as it interferes with the P-glycoprotein (P-gp) function. Voacamine promotes apoptosis-independent autophagic cell death in human osteosarcoma cells. Voacamine activates mitochondrial-associated apoptosis signaling pathway and inhibition of PI3K/Akt/mTOR signaling pathway to suppress breast cancer progression. Voacamine inhibits EGFR to exert oncogenic activity against colorectal cancer.
    Voacamine
  • HY-124582
    NEO214
    		Activator 98.0%
    NEO214 is an autophagy inhibitor and a covalent conjugate of the PDE4 inhibitor Rolipram (HY-16900) and perillyl alcohol (HY-N7000). It has anti-cancer activity and blood-brain barrier (BBB) permeability. Over sex. NEO214 prevents autophagy-lysosome fusion, thereby blocking autophagic flux and triggering glioma cell death. The process involves mTOR activation, andTFEB(Transcription Factor EB) aggregation. NEO214 inhibitionMacroautophagy/autophagy in glioblastoma cells has the potential to overcome chemotherapy resistance in glioblastoma.
    NEO214
  • HY-N0390S3
    L-Glutamine-13C5,15N2,d5
    		Inhibitor 99.91%
    L-Glutamine-13C5,15N2,d5 is the deuterium, 13C-, and 15N-labeled L-Glutamine (HY-N0390). L-Glutamine is an orally active nutritional agent and cellular metabolism regulator. L-Glutamine is taken up in a Na+-dependent manner and targets multiple key molecules including glutaminase, mTORC1, NF-κB, STAT-3 and HIF-1α. L-Glutamine enhances glutaminolytic catabolism, drives the conversion of glutamate to α-ketoglutarate, thereby regulating gene expression, integrating metabolic signals, mediating glutamine flux and maintaining redox homeostasis. L-Glutamine also promotes cell proliferation, osteogenic differentiation and fracture healing, exerts neuroprotective and cardioprotective effects, and inhibits osteoarthritis. L-Glutamine can be applied to research related to osteoporosis, osteoarthritis, ischemic stroke and acute cantharidin-induced cardiotoxicity.
    L-Glutamine-<sup>13</sup>C<sub>5</sub>,<sup>15</sup>N<sub>2</sub>,d<sub>5</sub>
  • HY-P10323A
    T7 Peptide TFA
    		Inhibitor 98.20%
    T7 Peptide TFA is a protein synthesis inhibitor and anti-angiogenic agent, with a Kd of 10 nM for human transferrin receptor. T7 Peptide TFA inhibits the phosphorylation of focal adhesion kinase, the activation of phosphatidylinositol 3-kinase and Akt, the kinase activity of mTOR, as well as the phosphorylation of 4E-BP1 in endothelial cells. T7 Peptide TFA induces G0/G1 cell cycle arrest, apoptosis and protective autophagy in hepatocellular carcinoma cells, and suppresses tumor growth in mouse models. T7 Peptide TFA is applicable to research related to cancer, glioblastoma, hepatocellular carcinoma and glioma.
    T7 Peptide TFA
  • HY-N0486S4
    L-Leucine-d7
    		Activator 99.91%
    L-Leucine-d7 is the deuterium labeled L-Leucine. L-Leucine is an essential branched-chain amino acid (BCAA), which activates the mTOR signaling pathway.
    L-Leucine-d<sub>7</sub>
  • HY-121811
    Pongamol
    		Inhibitor 99.81%
    Pongamol (Lanceolatin C) is an orally active flavonoid with an IC50 of 75 μM and a Ki of 58 μM against PTPase-1B, and an IC50 of 103.5 μM against intestinal α-Glycosidase. Pongamol reduces the release of IL‑1β, TNF‑α, COX‑2 and iNOS in cells, reverses the nuclear translocation of NF‑κB, and upregulates the levels of Beclin 1 and LC3 Ⅱ/LC3 Ⅰ. Pongamol promotes glucose uptake by increasing the level of GLUT4 on the surface of skeletal muscle cells. Pongamol inhibits epithelial-mesenchymal transition by suppressing the FAK/Akt-mTOR signaling pathway. Pongamol inhibits neuronal cytotoxicity, suppresses cell apoptosis and extends the lifespan of Caenorhabditis elegans by activating the MAPKs/Nrf2 signaling pathway. Pongamol exerts hypoglycemic effects in diabetic mouse models. Pongamol exhibits antibacterial activity. Pongamol alleviates oxidative stress, neuroinflammation, Aβ deposition and excessive phosphorylation of Tau Protein, and restores autophagy function in Alzheimer's disease mouse models by inhibiting the Akt/mTOR signaling pathway. Pongamol is applicable to research related to Alzheimer's disease, type 2 diabetes, non-small cell lung cancer and postprandial hyperglycemia.
    Pongamol
  • HY-N5136
    25(R,S)-Ruscogenin
    		Inhibitor 99.83%
    Ruscogenin suppresses HCC metastasis by reducing the expression of MMP-2, MMP-9, uPA, VEGF and HIF-1α via regulating the PI3K/Akt/mTOR signaling pathway. And Ruscogenin alleviates LPS-induced pulmonary endothelial cell apoptosis by su
    25(R,S)-Ruscogenin
  • HY-101349
    L 741742
    		Inhibitor 99.28%
    L 741742 is a highly selective and brain-penetrant D4 dopamine receptor antagonist, with Ki values of 3.5 nM, 770 nM and >1700 nM for human D4, D3 and D2 receptors, respectively. L 741742 suppresses PDGFRβ, ERK1/2, and mTOR signaling pathways, and impairs autophagic flux while disrupting lysosomal function.L 741742 induces G0/G1 cell-cycle arrest and apoptosis, promotes neuronal differentiation of normal human neural stem cells, selectively inhibits growth and clonogenic potential of glioblastoma neural stem cells and primary glioblastoma tumor cells, exerts synergistic effects with Temozolomide (TMZ) (HY-17364) against glioblastoma neural stem cells in vitro, and inhibits glioblastoma neural stem cell xenograft growth in immunocompromised mice. L 741742 can be used for the research of schizophrenia and glioblastoma.
    L 741742
  • HY-N2896
    Arjunolic acid
    		Activator 98.83%
    Arjunolic acid is an orally active, multifunctional bioactive compound. Arjunolic acid exhibits free radical scavenging activity, as well as fungal and bacterial activities. Arjunolic acid induces apoptosis (Apoptosis) in various cancer cells. Arjunolic acid protects hepatocytes against induced oxidative stress and apoptosis by reducing reactive oxygen species and inhibiting NF-κB activation. Arjunolic acid regulates pancreatic dysfunction in type 2 diabetic rats by blocking the activation of the TLR-4/MyD88 and canonical Wnt pathways. Arjunolic acid inhibits neuroinflammation and ameliorates depressive behaviors via the SIRT1/AMPK/Notch1 signaling pathway in microglia. Arjunolic acid improves Crohn's disease-like colitis by restoring gut microbiota composition and inhibiting TLR4 signaling. Arjunolic acid suppresses osteosarcoma progression by inhibiting Wnt3a-mediated M2 polarization of macrophages. Arjunolic acid ameliorates diabetic retinopathy via the autophagy pathway regulated by AMPK/mTOR/HO-1. Arjunolic acid is applicable to research related to type 2 diabetes, organ toxicity, depression, Crohn's disease, osteosarcoma, diabetic retinopathy, and testicular dysfunction.
    Arjunolic acid
  • HY-Y0106
    2,6-Dihydroxyacetophenone
    		Inhibitor 99.85%
    2,6-Dihydroxyacetophenone, a polyphenolic derivative of Acetophenone (HY-Y0989), is an orally active mTOR inhibitor. 2,6-Dihydroxyacetophenone shows antioxidant activity. 2,6-Dihydroxyacetophenone inhibits cell growth and proliferation in CRC cells. 2,6-Dihydroxyacetophenone arrests at G0/G1 phase of cell cycle, induces apoptosis and suppresses cell migration in CRC cells. 2,6-Dihydroxyacetophenone inhibits xanthine oxidase (XOD) with an IC50 of 1.24 mM. 2,6-dihydroxyacetophenone improves uric acid metabolism in hyperuricemia mice, reduces plasma cholesterol in hypercholesterolemic rats, and inhibits lipid accumulation in HFD-induced obese mice. 2,6-Dihydroxyacetophenone can be used for the study of colorectal cancer (CRC), hyperuricemia and hypercholesterolemia.
    2,6-Dihydroxyacetophenone
  • HY-15271
    WYE-687
    		Inhibitor 98.05%
    WYE-687 is an ATP-competitive mTOR inhibitor with an IC50 of 7 nM. WYE-687 concurrently inhibits activation of mTORC1 and mTORC2. WYE-687 also inhibits PI3Kα and PI3Kγ with IC50s of 81 nM and 3.11 μM, respectively.
    WYE-687
  • HY-N2000
    Bellidifolin
    		Modulator 99.74%
    Bellidifolin is an orally active compound with antiproliferative, anti-inflammatory and antioxidant properties. Bellidifolin modulates key signaling pathways including STAT3, PI3K-Akt, mTOR and BRD4, and inhibits the viral protein R (Vpr). Bellidifolin induces cell cycle arrest and apoptosis, exerts significant antifibrotic effects, and protects the heart, liver and nervous system. Bellidifolin is applicable to the research of various diseases such as lung cancer, non-alcoholic fatty liver disease, myocardial hypertrophy and ischemic cranial nerve injury.
    Bellidifolin
  • HY-171047
    Autophagy inducer 7
    		Inhibitor 99.45%
    Autophagy inducer 7 (Compound SSA) is an Autophagy and Apoptosis inducer. Autophagy inducer 7 activates autophagy by inhibiting Akt/mTOR signaling and the expression of downstream proteins. Autophagy inducer 7 suppresses DNA synthesis and causes a G0-G1 cell-cycle arrest. Autophagy inducer 7 inhibits tumor cell growth.
    Autophagy inducer 7
  • HY-N6896
    Isoviolanthin
    		Inhibitor 99.87%
    Isoviolanthin is a flavonoid glycoside. Isoviolanthin can be extracted from Dendrobium officinale. Isoviolanthin has a strong affinity for binding to KDM6B, CHAC2, ESCO2, and IPO4. Isoviolanthin decreases MMP-2 and MMP-9. Isoviolanthin inhibits TGF-β/Smad and PI3K/Akt/mTOR signaling pathways. Isoviolanthin increases Fhl3 expression. Isoviolanthin has cytoprotective effects. Isoviolanthin has anticancer activity against hepatocellular carcinoma.
    Isoviolanthin
  • HY-N9942
    Physalin A
    		Inhibitor 99.63%
    Physalin A is a biologically active withanolide. Physalin A shows anti-inflammatory, antifibrotic and ameliorative effects on autophagy in models of disc degeneration. Physalin A has antitumor activity and can induce apoptosis, ROS production and G2/M phase cell cycle arrest. Besides. Physalin A can significantly increase the activity of quinone reductase and increase the expression of detoxifying enzymesc.
    Physalin A
  • HY-10219S1
    Rapamycin-13C,d3
    		Inhibitor
    Rapamycin-13C,d3 (Sirolimus-13C,d3) is the 13C, deuterated-labeled Rapamycin (HY-10219). Rapamycin (Sirolimus; AY 22989) is a potent and specific blood-brain barrier-transmissible mTOR inhibitor with an IC50 of 0.1 nM in HEK293 cells. Rapamycin is a molecular glue that binds FKBP12 and mTOR proteins together, thereby inhibiting mTOR kinase activity. Rapamycin binds to FKBP12 and specifically acts as an allosteric inhibitor of mTORC1. Rapamycin is an autophagy activator, an immunosuppressant.
    Rapamycin-<sup>13</sup>C,d<sub>3</sub>
  • 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-101776A
    Desmethyl-VS-5584 hydrochloride
    		Inhibitor 98.63%
    Desmethyl-VS-5584 hydrochloride is a dimethyl analog of VS-5584, a potent and selective mTOR/< with a pyridine[2,3-d]pyrimidine structure. b>PI3KDual inhibitor.
    Desmethyl-VS-5584 hydrochloride
Cat. No. Product Name / Synonyms Application Reactivity
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Download mTOR Signaling Pathway Map.

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.

mTOR Isoform Comparison

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