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-15174
    Dactolisib Tosylate
    		Inhibitor 99.87%
    Dactolisib Tosylate (BEZ235 Tosylate) is a dual PI3K and mTOR kinase inhibitor with IC50 values of 4, 75, 7, 5 nM for PI3Kα, β, γ, δ, respectively. Dactolisib Tosylate (BEZ235 Tosylate) inhibits mTORC1 and mTORC2.
    Dactolisib Tosylate
  • HY-N0876
    Arenobufagin
    		99.86%
    Arenobufagin is a natural bufadienolide that can be extracted from toad venom. Arenobufagin can induce apoptosis and autophagy in human hepatocellular carcinoma cells through inhibition of PI3K/Akt/mTOR pathway. Arenobufagin has potent antineoplastic activity against HCC HepG2 cells as well as corresponding multidrug-resistant HepG2/ADM cells. Arenobufagin can inhibit VEGF-mediated angiogenesis through suppression of VEGFR-2 signaling pathway.
    Arenobufagin
  • HY-13334A
    BGT226
    		Inhibitor 99.85%
    BGT226 (NVP-BGT226) is a PI3K (with IC50s of 4 nM, 63 nM and 38 nM for PI3Kα, PI3Kβ and PI3Kγ)/mTOR dual inhibitor which displays potent growth-inhibitory activity against human head and neck cancer cells.
    BGT226
  • HY-W142080
    α-Methyl-DL-tryptophan
    		Inhibitor 99.92%
    α-Methyl-DL-tryptophan (α-Methyltryptophan), a tryptophan derivative, is a selective SLC6A14 blocker. In estrogen receptor (ER)-positive breast cancer cells, α-Methyl-DL-tryptophan inhibits mTOR and activates autophagy and apoptosis. α-Methyl-DL-tryptophan also has the effect of reducing weight.
    α-Methyl-DL-tryptophan
  • HY-N0447
    8-Gingerol
    		Modulator 99.82%
    8-Gingerol can be found in the rhizome of ginger (Z. officinale) and has oral bioactivity. It activates TRPV1, with an EC50 value of 5.0 µM. 8-Gingerol inhibits COX-2 and also suppresses the growth of H. pylori in vitro. Additionally, 8-Gingerol exhibits anticancer, antioxidant, and anti-inflammatory properties by inhibiting the epidermal growth factor receptor (EGFR) and modulating its downstream STAT3/ERK pathway to suppress the proliferation, migration, and invasion of colorectal cancer cells. 8-Gingerol also exerts immunosuppressive effects by inhibiting oxidative stress, inducing cell cycle arrest, promoting apoptosis, and regulating autophagy. Furthermore, 8-Gingerol has cardioprotective effects. 8-Gingerol is promising for research in the fields of cancer, infection, immunosuppression, and cardiovascular diseases.
    8-Gingerol
  • HY-134904
    RMC-6272
    		Inhibitor
    RMC-6272 (RM-006) is a bi-steric mTORC1-selective inhibitor. RMC-6272 exhibits potent and selective (> 10-fold) inhibition of mTORC1 over mTORC2. RMC-6272 shows improved inhibition of mTORC1 in comparison to Rapamycin, and induces more cell death in TSC2 null tumors.
    RMC-6272
  • HY-10423
    OSI-027
    		Inhibitor 99.95%
    OSI-027 (ASP7486) is a potent, selective, orally active and ATP-competitive mTOR kinase activity inhibitor with an IC50 of 4 nM. OSI-027 targets both mTORC1 and mTORC2 with IC50s of 22 nM and 65 nM, respectively.
    OSI-027
  • HY-N6602
    α-Solanine
    		Inhibitor 99.89%
    α-solanine, a bioactive component and one of the major steroidal glycoalkaloids in Solanum nigrum, has been observed to inhibit growth and induce apoptosis in cancer cells.
    α-Solanine
  • HY-16956
    Onatasertib
    		Inhibitor 99.13%
    Onatasertib (CC-223) is a potent, selective, and orally bioavailable inhibitor of mTOR kinase, with an IC50 value for mTOR kinase of 16 nM. Onatasertib inhibits both mTORC1 and mTORC2.
    Onatasertib
  • HY-D0195
    Acesulfame potassium
    		Activator 99.38%
    Acesulfame potassium is a synthetic sweetener. Long-term use of Acesulfame potassium can affect cognitive function, possibly by altering the neurometabolic functions in mice. Acesulfame potassium can suppress autophagic degradation of PD-L1 in RIL-175 and SK-Hep1 cells through the ERK1/2-mTORC1-ULK1 pathway, which may be related to immune evasion in cancer cells. Acesulfame potassium can be used in research on neurological diseases, metabolic disorders, cancer, and immune evasion.
    Acesulfame potassium
  • HY-15900
    Voxtalisib
    		Inhibitor 99.82%
    Voxtalisib (XL765) is a potent PI3K inhibitor, which has a similar activity toward class I PI3K (IC50s=39, 113, 9 and 43?nM for p110α, p110β, p110γ and p110δ, respectively), also inhibits DNA-PK (IC50=150?nM) and mTOR (IC50=157?nM). Voxtalisib (XL765) inhibits mTORC1 and mTORC2 with IC50s of 160 and 910 nM, respectively.
    Voxtalisib
  • HY-N0404
    Sinigrin
    		Inhibitor 99.97%
    Sinigrin (Allyl-glucosinolate) is an orally active glucosinolate found in cruciferous plants. Sinigrin possesses multiple activities such as anti-cancer, antibacterial, antifungal, anti-inflammatory, antioxidant, and inhibition of fat synthesis. Sinigrin can be used in the research of tumors, inflammatory, and metabolic diseases.
    Sinigrin
  • HY-134508
    C24-Ceramide
    		Activator 99.92%
    C24-Ceramide is an orally active competitive binding agonist of PIP4K2C (mTOR complex regulator), thereby activating the mTOR signaling pathway. At the same time, C24-Ceramide changes the membrane morphology by inducing the formation of a partially interlocked gel phase in the phospholipid bilayer. C24-Ceramide can promote the proliferation and migration of keratinocytes to accelerate skin wound healing and drive the proliferation and metastasis of gallbladder cancer cells. The level of C24-Ceramide in serum can be used as a diagnostic marker for gallbladder cancer.
    C24-Ceramide
  • HY-B0766
    Bicyclol
    		99.91%
    Bicyclol (SY801) is an orally active derivative of the traditional Chinese medicine Schisandra chinensis, which has antiviral, anti-inflammatory, immunomodulatory, antioxidant, anti-steatosis, anti-fibrotic and anti-tumor activities. Bicyclol regulates the expression of heat shock proteins and plays an anti-apoptosis role in hepatocytes. Bicyclol reduces the activation of NF-κB and the levels of inflammatory factors in hepatocytes infected with hepatitis C virus (HCV) by inhibiting the activation of the ROS-MAPK-NF-κB pathway, and prevents ferroptosis in acute liver injury. Bicyclol can change the expression of Mdr-1, GSH/GST and Bcl-2, increase the intracellular concentration of anticancer drugs, and sensitize drug-resistant cells to anticancer drugs. Bicyclol inhibits the proliferation of human malignant hepatoma cells by regulating the PI3K/AKT pathway and the Ras/Raf/MEK/ERK pathway. Bicyclol can be used in the study of chronic hepatitis, acute liver injury, nonalcoholic fatty liver disease, liver fibrosis and hepatocellular carcinoma.
    Bicyclol
  • HY-128483
    Fusaric acid
    		Inhibitor 99.94%
    Fusaric acid is an orally active multi-pathway inhibitor with the activity of inducing oxidative stress and apoptosis. Fusaric acid can chelate divalent metal cations, damage mitochondrial membrane structure, and activate apoptosis-related proteases such as Caspase-3/7, -8, and -9. Fusaric acid also regulates Bax/Bcl-2 protein, inhibits fibrosis-related signaling pathways such as NF-κB, TGF-β1/SMADs, and PI3K/AKT/mTOR, and reduces collagen deposition. Fusaric acid is also a dopamine β-hydroxylase inhibitor, which reduces endogenous levels of norepinephrine and epinephrine in the brain, heart, spleen, and adrenal glands. Fusaric acid can play a role in myocardial fibrosis and improve cardiac hypertrophy in heart disease, and can also be used in the study of esophageal cancer and liver cancer.
    Fusaric acid
  • HY-10044
    WYE-132
    		Inhibitor 99.90%
    WYE-132 (WYE-125132) is a highly potent, ATP-competitive, and specific mTOR kinase inhibitor (IC50: 0.19±0.07 nM; >5,000-fold selective versus PI3Ks). WYE-132 (WYE-125132) inhibits mTORC1 and mTORC2.
    WYE-132
  • HY-N6996
    Methyl Eugenol
    		Inhibitor 99.79%
    Methyl Eugenol is a bait that has oral activity against oriental fruit fly (Hendel).Methyl Eugenol has anti-cancer and anti-inflammatory activities. Methyl Eugenol can induce Autophagy in cells. Methyl Eugenol can be used in the study of intestinal ischemia/reperfusion injury.
    Methyl Eugenol
  • HY-W592871
    10-Hydroxy-2-decenoic acid
    		99.99%
    10-Hydroxy-2-decenoic acid (10-HDA) is an orally active unsaturated medium-chain fatty acid with various physiological activities. 10-Hydroxy-2-decenoic acid induces ROS-mediated apoptosis in A549 cells. 10-Hydroxy-2-decenoic acid inhibits VEGF-induced angiogenesis in human venous endothelial cells. 10-Hydroxy-2-decenoic acid alleviates non-alcoholic fatty liver disease (NAFLD) by activating the AMPK-α signaling pathway. 10-Hydroxy-2-decenoic acid protects against bone loss by inhibiting NF-κB signaling downstream of FFAR4. 10-Hydroxy-2-decenoic acid is an antibiotic against many bacteria and fungi, such as Neurospora sitophila, molds and Staphylococcus aureus. 10-Hydroxy-2-decenoic acid has longevity-promoting effects in C. elegans. 10-Hydroxy-2-decenoic acid prevents osteoarthritis by targeting aspartyl β hydroxylase and inhibiting chondrocyte senescence.
    10-Hydroxy-2-decenoic acid
  • HY-W011927
    4,4'-Sulfonyldiphenol
    		Agonist 99.81%
    4,4'-Sulfonyldiphenol (Bisphenol S; Bis(4-hydroxyphenyl) sulfone), a substitute for Bisphenol A (HY-18260), is widely used in industrial and consumer products. 4,4'-Sulfonyldiphenol is an oally ative estrogen receptor (ER) agonist and can competitively bind to thyroid hormone receptors (TR) with IC50 values for TRα and TRβ are 2650 μM and 2294 μM respectively, thereby affecting breast development and reducing the expression of androgen receptor (AR) in fetal testes. 4,4'-Sulfonyldiphenol promotes the progression of glioblastoma by upregulating the EZH2 mediated PI3K/AKT/mTOR pathway. Under chronic exposure, 4,4'-Sulfonyldiphenol can cause significant lipid deposition and dyslipidemia in the mouse liver by upregulating JunB and Atf3, and has a role in causing obesity at low doses. 4,4'-Sulfonyldiphenol induces intestinal inflammation by altering the intestinal microbiome. 4,4'-Sulfonyldiphenol accelerates the progression of atherosclerosis in zebrafish embryo larvae.
    4,4'-Sulfonyldiphenol
  • HY-12763
    GNE-317
    		Inhibitor 98.76%
    GNE-317 is a PI3K/mTOR inhibitor, is able to cross the blood-brain barrier (BBB).
    GNE-317
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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