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Catalog No.
Substance P (SP) inhibitor
Grouped product items
SizePriceStock Qty
10mM (in 1mL DMSO)
In stock
In stock
In stock
In stock

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Aprepitant (also known as MK-0869) is a novel and highly selective Neurokinin-1 (NK-1) receptor antagonist that inhibits the activity of substance P (SP), an undecapeptide belonging to the tachykinin family of peptides, on the NK-1 receptor with the dissociation constant Kd of 86 pM for human NK-1 receptor and the half maximal inhibition concentration IC50 of 0.1 nM, 4 nM and 0.7 nM for human, rat and ferret NK-1 receptors respectively [1,2].

Since SP has been demonstrated to induce cell proliferation in several human cancer cell lines with overexpressed NK-1 receptors, aprepitant has also been found to concentration-dependently induce growth inhibition in a variety of tumor cell lines, including glioma (GAMG), neuroblastoma (SKN-BE2, IMR-32 and KELLY), retinoblastoma (Y-79 and WERI-Rb-1), pancreas carcinoma (PA-TU-8902 and CAPAN-1), larynx carcinoma (HEp-2), gastric carcinoma (23132-87) and colon carcinoma (SW-403), with IC50 of 33.1 μΜ, 24.6 μΜ, 19.6 μΜ, 27.7 μΜ, 30.4 μΜ, 23 μΜ, 31.2 μΜ, 27.4 μΜ, 22.7 μΜ, 24.2 μΜ and 30.5 μΜ respectively [2].

[1] Tattersall FD1, Rycroft W, Cumberbatch M, Mason G, Tye S, Williamson DJ, Hale JJ, Mills SG, Finke PE, MacCoss M, Sadowski S, Ber E, Cascieri M, Hill RG, MacIntyre DE, Hargreaves RJ. The novel NK1 receptor antagonist MK-0869 (L-754,030) and its water soluble phosphoryl prodrug, L-758,298, inhibit acute and delayed cisplatin-induced emesis in ferrets. Neuropharmacology. 2000 Feb 14;39(4):652-63.
[2] Muñoz M1, Rosso M. The NK-1 receptor antagonist aprepitant as a broad spectrum antitumor drug. Invest New Drugs. 2010 Apr;28(2):187-93. doi: 10.1007/s10637-009-9218-8. Epub 2009 Jan 17.

Product Citation

Chemical Properties

Physical AppearanceA solid
StorageStore at -20°C
Cas No.170729-80-3
Solubility≥26.72 mg/mL in DMSO; insoluble in H2O; insoluble in EtOH
Chemical Name5-[[(2R,3S)-2-[1-[3,5-bis(trifluoromethyl)phenyl]ethoxy]-3-(4-fluorophenyl)morpholin-4-yl]methyl]-1,2-dihydro-1,2,4-triazol-3-one
SDFDownload SDF
Canonical SMILESCC(C1=CC(=CC(=C1)C(F)(F)F)C(F)(F)F)OC2C(N(CCO2)CC3=NC(=O)NN3)C4=CC=C(C=C4)F
Shipping ConditionEvaluation sample solution: ship with blue ice. All other available sizes: ship with RT, or blue ice upon request.
General tipsFor obtaining a higher solubility, please warm the tube at 37°C and shake it in the ultrasonic bath for a while. Stock solution can be stored below -20°C for several months.


Cell experiment [1]:

Cell lines

Nalm-6 cells

Preparation method

The solubility of this compound in DMSO is >26.7mg/mL. General tips for obtaining a higher concentration: Please warm the tube at 37 ℃ for 10 minutes and/or shake it in the ultrasonic bath for a while. Stock solution can be stored below -20℃ for several months.

Reacting condition

20 μM


Aprepitant decreased the metabolic activity with an estimated IC50 value of 20 μM. Aprepitant induced cell-growth inhibition and G1 cell-cycle arrest. Aprepitant significantly induced apoptosis in Nalm-6 cells. Aprepitant (20 μM) induced p53 accumulation and expression of pro-apoptotic p53 target genes.

Animal experiment [2]:

Animal models

Male C57BL/6J mice

Dosage form

Intraperitoneal injection, 10 mg/kg


Aprepitant (10 mg/kg, i.p.) significantly attenuated AMPH-induced CPP expression and locomotor activation produced by AMPH and cocaine in mice. Aprepitant significantly enhanced the expression of CPP produced by morphine while significantly suppressing the locomotor activity of the mice conditioned with morphine.

Other notes

Please test the solubility of all compounds indoor, and the actual solubility may slightly differ with the theoretical value. This is caused by an experimental system error and it is normal.


[1]. Bayati S, Bashash D, Ahmadian S, et al. Inhibition of tachykinin NK 1 receptor using aprepitant induces apoptotic cell death and G1 arrest through Akt/p53 axis in pre-B acute lymphoblastic leukemia cells[J]. European journal of pharmacology, 2016, 791: 274-283.

[2]. Mannangatti P, Sundaramurthy S, Ramamoorthy S, et al. Differential effects of aprepitant, a clinically used neurokinin-1 receptor antagonist on the expression of conditioned psychostimulant versus opioid reward[J]. Psychopharmacology, 2017, 234(4): 695-705.

Quality Control

Chemical structure