Home MAPK MEK inhibitor - Autophagy inhibitor - Antiviral inhibitor - Mitophagy inhibitor U0126-EtOH For research use only.

U0126-EtOH

U0126-EtOH is a highly selective inhibitor of MEK1/2 with IC50 of 0.07 μM/0.06 μM in cell-free assays, 100-fold higher affinity for ΔN3-S218E/S222D MEK than PD98059. U0126 inhibits autophagy and mitophagy with antiviral activity.

U0126-EtOH Chemical Structure

U0126-EtOH Chemical Structure

CAS No. 1173097-76-1

Purity & Quality Control

Products often used together with U0126-EtOH

SP600125

U0126-EtOH and SP600125 reverse several genes upregulation in RAW264.7 and Ana-1 cells caused by Echinococcus multilocularis soluble antigen.

Chong S, et al. Bioengineered. 2022 Apr;13(4):8747-8758.

Adezmapimod (SB203580)

U0126-EtOH and Adezmapimod ameliorate indoxyl sulfate-induced inhibitory effects and reductions in Kv4.2, Kv4.3, and KChIP2 proteins and genes.

Yang J, et al. JCI Insight. 2022 Feb 8; 7(3): e145475.

Purmorphamine

U0126-EtOH in the presence of Purmorphamine inhibits sonic hedgehog-induced levels of p-ERK1/2 in RA-FLSs.

Liu F, et al. Front Immunol. 2018 Dec 5;9:2847.

U0126-EtOH Related Products

Signaling Pathway

MEK Signaling Pathways

MEK Signaling Pathway

Cell Data

Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
rat PC12 cells Function assay 10 μM 1 h Activation of Nrf2/ARE in rat PC12 cells assessed as HO-1 protein induction at 10 uM after 5 hrs pretreated with JNK inhibitor SP600125 for 1 hr before compound addition by Western blot analysis 21345685
mouse RAS-3T3 cells Function assay 10-40 μM Inhibition of MEK-mediated ERK1/2 phosphorylation in mouse RAS-3T3 cells at 10 to 40 uM by ELISA. 24507826
HCT116 cells Function assay Ability of compound to inhibit anchorage independent colony formation (soft agar growth assay) in HCT116 cells, IC50=19.4 μM. 15225706
COS-7 cells Function assay Inhibitory concentration against AP-1 transcription in COS-7 cells， IC50=1 μM. 15006386
HeLa cells Function assay Inhibition of EGF-stimulated Elk1-luciferase reporter assay in HeLa cells, IC50=0.29 μM. 15225706
Click to View More Cell Line Experimental Data

Biological Activity

Description U0126-EtOH is a highly selective inhibitor of MEK1/2 with IC50 of 0.07 μM/0.06 μM in cell-free assays, 100-fold higher affinity for ΔN3-S218E/S222D MEK than PD98059. U0126 inhibits autophagy and mitophagy with antiviral activity.
Features A chemically synthesized and highly selective inhibitor of both MEK1 and MEK2.
Targets
MEK2 [1]
(Cell-free assay)		 MEK1 [1]
(Cell-free assay)
0.06 μM 0.07 μM
In vitro
In vitro

U0126-EtOH functionally antagonizes AP- 1 transcriptional activity and blocks the production of a variety of cytokines and metalloproteinases involved in the inflammatory response. [1] U0126-EtOH inhibits T cell proliferation in response to antigenic stimulation or cross-linked anti-CD3 plus anti-CD28 Abs without effect on IL-2-induced proliferation by down-regulating IL-2 mRNA levels. [2] A recent study shows that U0126-EtOH antagonizes resveratrol-induced apoptosis in castration-resistant human prostate cancer C4-2 cells, inhibits mitochondrial function and shifts cells to aerobic glycolysis independently of MEK. [3]
Kinase Assay In Vitro Kinase Assays
The amount of immunoprecipitated wild type MEK used in these assays is adjusted to give a similar amount of activity units as obtained with 10 nM recombinant MEK. Reaction velocities are measured using a 96-well nitrocellulose filter apparatus as described below. Unless otherwise noted, reactions are carried out at an enzyme concentration of 10 nM, in 20 mM Hepes, 10 mM MgCl2, 5 mM β-mercaptoethanol, 0.1 mg/mL BSA, pH 7.4, at room temperature. Reactions are initiated by the addition of [γ-33P]ATP into the premixed MEK/ERK/inhibitor reaction mixture, and an aliquot of 100 μL is taken every 6 minutes and transferred to the 96-well nitrocellulose membrane plate which has 50 mM EDTA to stop the reaction. The membrane plate is drawn and washed 4 times with buffer under vacuum. Wells are then filled with 30 μL of Microscint-20 scintillation fluid, and the radioactivity of 33P-phosphorylated ERK is counted with a Top Count scintillation counter. Velocities are obtained from the slopes of radioactivity versus time plots. Concentrations of ERK and ATP are 400 nM and 40 μM, respectively, unless otherwise indicated. For all of the in vitro enzyme assays, the percent inhibition is calculated 100 (1 −Vi/Vo) where Vi and Vo are the initial reaction velocities in the presence and absence of inhibitor, respectively. The data are then plotted as percent inhibition as a function of inhibitor concentration and fit, by nonlinear least squares regression, to the standard equation for a Langmuir isotherm to determine the IC50. As reported, enzyme concentrations are based upon molecular weights and mass of protein used in the final assay volume and not on active site titration. Thus, the actual enzyme active site concentration may differ from that reported.
Cell Research Cell lines A.E7 or Th17 cells
Concentrations 0 to 10 μM
Incubation Time 48 hours
Method

A.E7 or Th17 cells are incubated with C-treated B10.BR or BALB/c splenocytes plus varying concentrations of pigeon cytochrome c or PR8 Ag, or with 5 U/mL human rIL-2. In addition, some assays contains U0126 or an inactive analogue, U0124, to determine direct effects of MEK inhibition on T cell proliferation. Two days after culture initiation, each well is pulsed with 1 µCi of [3H]TdR and harvested the following day. The incorporation of [3H]TdR into DNA is quantitated on a Packard Matrix 96 direct beta counter without the use of liquid scintillation mixtures.
Experimental Result Images Methods Biomarkers Images PMID
Western blot p-MEK / MEK / p-ERK / ERK E-cadherin / Vimentin / Twist-2 27487136
Immunofluorescence pERK / pPPARγ E-cadherin / Vimentin CD40 27145370
In Vivo
In vivo

U0126-EtOH, as the inhibitor of intracellular Raf/MEK/ERK signaling pathway, demonstrates antiviral activity by suppressing propagation of the 2009 pandemic IV H1N1 variant and highly pathogenic avian influenza viruses (HPAIV) in vivo in the mouse lung by inhibiting. [4] U0126-EtOH shows the potential neuroprotective effect and improving spatial learning in Morris water maze (MWM) by activating peroxisome proliferator-activated receptor gamma coactivator-1a, nuclear respiratory factor 1, and mitochondrial transcription factor A in Aβ-injected rats. [5]
Animal Research Animal Models Female C57Bl/6 mice infected by Mouse-adapted highly pathogenic avian influenza A/FPV/Bratislava/79 (H7N7; FPV) virus and swine origin human influenza A virus (SOIV) A/Regensburg/D6/2009 (H1N1v; RB1).
Dosages ≤10 mM
Administration Administered via aerosol.

Chemical Information & Solubility

Molecular Weight 426.56 Formula

C18H16N6S2.C2H6O
CAS No. 1173097-76-1 SDF Download U0126-EtOH SDF
Smiles CCO.C1=CC=C(C(=C1)N)SC(=C(C#N)C(=C(N)SC2=CC=CC=C2N)C#N)N
Storage (From the date of receipt)

In vitro
Batch:

DMSO : 85 mg/mL ( (199.26 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Water : Insoluble

Ethanol : Insoluble


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In vivo
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Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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Frequently Asked Questions

Question 1:
I want to know whether the compound is light-sensitive?

Answer:
S1102 U0126-EtOH is not stable. It should be stored as powder at -20°C, and prepared the solution just before use.

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